3968 lines
149 KiB
C++
3968 lines
149 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/MessageEntity.h"
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#include "td/telegram/ContactsManager.h"
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#include "td/telegram/misc.h"
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#include "td/telegram/SecretChatActor.h"
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/unicode.h"
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#include "td/utils/utf8.h"
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#include <algorithm>
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#include <cstring>
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#include <limits>
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#include <tuple>
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#include <unordered_set>
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namespace td {
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int MessageEntity::get_type_priority(Type type) {
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static const int types[] = {50, 50, 50, 50, 50, 90, 91, 20, 11, 10, 49, 49, 50, 50, 92, 93, 0};
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return types[static_cast<int32>(type)];
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}
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StringBuilder &operator<<(StringBuilder &string_builder, const MessageEntity::Type &message_entity_type) {
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switch (message_entity_type) {
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case MessageEntity::Type::Mention:
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return string_builder << "Mention";
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case MessageEntity::Type::Hashtag:
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return string_builder << "Hashtag";
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case MessageEntity::Type::BotCommand:
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return string_builder << "BotCommand";
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case MessageEntity::Type::Url:
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return string_builder << "Url";
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case MessageEntity::Type::EmailAddress:
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return string_builder << "EmailAddress";
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case MessageEntity::Type::Bold:
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return string_builder << "Bold";
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case MessageEntity::Type::Italic:
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return string_builder << "Italic";
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case MessageEntity::Type::Underline:
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return string_builder << "Underline";
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case MessageEntity::Type::Strikethrough:
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return string_builder << "Strikethrough";
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case MessageEntity::Type::BlockQuote:
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return string_builder << "BlockQuote";
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case MessageEntity::Type::Code:
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return string_builder << "Code";
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case MessageEntity::Type::Pre:
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return string_builder << "Pre";
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case MessageEntity::Type::PreCode:
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return string_builder << "PreCode";
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case MessageEntity::Type::TextUrl:
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return string_builder << "TextUrl";
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case MessageEntity::Type::MentionName:
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return string_builder << "MentionName";
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case MessageEntity::Type::Cashtag:
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return string_builder << "Cashtag";
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case MessageEntity::Type::PhoneNumber:
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return string_builder << "PhoneNumber";
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case MessageEntity::Type::BankCardNumber:
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return string_builder << "BankCardNumber";
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default:
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UNREACHABLE();
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return string_builder << "Impossible";
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}
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}
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StringBuilder &operator<<(StringBuilder &string_builder, const MessageEntity &message_entity) {
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string_builder << '[' << message_entity.type << ", offset = " << message_entity.offset
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<< ", length = " << message_entity.length;
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if (!message_entity.argument.empty()) {
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string_builder << ", argument = \"" << message_entity.argument << "\"";
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}
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if (message_entity.user_id.is_valid()) {
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string_builder << ", " << message_entity.user_id;
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}
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string_builder << ']';
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return string_builder;
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}
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tl_object_ptr<td_api::TextEntityType> MessageEntity::get_text_entity_type_object() const {
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switch (type) {
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case MessageEntity::Type::Mention:
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return make_tl_object<td_api::textEntityTypeMention>();
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case MessageEntity::Type::Hashtag:
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return make_tl_object<td_api::textEntityTypeHashtag>();
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case MessageEntity::Type::BotCommand:
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return make_tl_object<td_api::textEntityTypeBotCommand>();
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case MessageEntity::Type::Url:
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return make_tl_object<td_api::textEntityTypeUrl>();
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case MessageEntity::Type::EmailAddress:
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return make_tl_object<td_api::textEntityTypeEmailAddress>();
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case MessageEntity::Type::Bold:
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return make_tl_object<td_api::textEntityTypeBold>();
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case MessageEntity::Type::Italic:
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return make_tl_object<td_api::textEntityTypeItalic>();
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case MessageEntity::Type::Underline:
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return make_tl_object<td_api::textEntityTypeUnderline>();
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case MessageEntity::Type::Strikethrough:
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return make_tl_object<td_api::textEntityTypeStrikethrough>();
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case MessageEntity::Type::BlockQuote:
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return nullptr;
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case MessageEntity::Type::Code:
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return make_tl_object<td_api::textEntityTypeCode>();
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case MessageEntity::Type::Pre:
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return make_tl_object<td_api::textEntityTypePre>();
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case MessageEntity::Type::PreCode:
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return make_tl_object<td_api::textEntityTypePreCode>(argument);
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case MessageEntity::Type::TextUrl:
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return make_tl_object<td_api::textEntityTypeTextUrl>(argument);
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case MessageEntity::Type::MentionName:
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// can't use contacts_manager, because can be called from a static request
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return make_tl_object<td_api::textEntityTypeMentionName>(user_id.get());
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case MessageEntity::Type::Cashtag:
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return make_tl_object<td_api::textEntityTypeCashtag>();
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case MessageEntity::Type::PhoneNumber:
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return make_tl_object<td_api::textEntityTypePhoneNumber>();
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case MessageEntity::Type::BankCardNumber:
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return make_tl_object<td_api::textEntityTypeBankCardNumber>();
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default:
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UNREACHABLE();
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return nullptr;
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}
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}
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tl_object_ptr<td_api::textEntity> MessageEntity::get_text_entity_object() const {
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return make_tl_object<td_api::textEntity>(offset, length, get_text_entity_type_object());
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}
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vector<tl_object_ptr<td_api::textEntity>> get_text_entities_object(const vector<MessageEntity> &entities) {
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vector<tl_object_ptr<td_api::textEntity>> result;
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result.reserve(entities.size());
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for (auto &entity : entities) {
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auto entity_object = entity.get_text_entity_object();
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if (entity_object->type_ != nullptr) {
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result.push_back(std::move(entity_object));
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}
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}
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return result;
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}
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StringBuilder &operator<<(StringBuilder &string_builder, const FormattedText &text) {
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return string_builder << '"' << text.text << "\" with entities " << text.entities;
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}
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td_api::object_ptr<td_api::formattedText> get_formatted_text_object(const FormattedText &text) {
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return td_api::make_object<td_api::formattedText>(text.text, get_text_entities_object(text.entities));
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}
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static bool is_word_character(uint32 code) {
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switch (get_unicode_simple_category(code)) {
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case UnicodeSimpleCategory::Letter:
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case UnicodeSimpleCategory::DecimalNumber:
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case UnicodeSimpleCategory::Number:
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return true;
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default:
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return code == '_';
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}
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}
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/*
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static bool is_word_boundary(uint32 a, uint32 b) {
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return is_word_character(a) ^ is_word_character(b);
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}
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*/
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static bool is_alpha_digit(uint32 code) {
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return ('0' <= code && code <= '9') || ('a' <= code && code <= 'z') || ('A' <= code && code <= 'Z');
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}
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static bool is_alpha_digit_or_underscore(uint32 code) {
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return is_alpha_digit(code) || code == '_';
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}
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static bool is_alpha_digit_or_underscore_or_minus(uint32 code) {
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return is_alpha_digit_or_underscore(code) || code == '-';
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}
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// This functions just implements corresponding regexps
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// All other fixes will be in other functions
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static vector<Slice> match_mentions(Slice str) {
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vector<Slice> result;
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const unsigned char *begin = str.ubegin();
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const unsigned char *end = str.uend();
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const unsigned char *ptr = begin;
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// '/(?<=\B)@([a-zA-Z0-9_]{2,32})(?=\b)/u'
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while (true) {
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ptr = static_cast<const unsigned char *>(std::memchr(ptr, '@', narrow_cast<int32>(end - ptr)));
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if (ptr == nullptr) {
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break;
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}
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if (ptr != begin) {
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uint32 prev;
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next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_mentions");
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if (is_word_character(prev)) {
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ptr++;
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continue;
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}
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}
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auto mention_begin = ++ptr;
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while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
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ptr++;
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}
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auto mention_end = ptr;
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auto mention_size = mention_end - mention_begin;
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if (mention_size < 2 || mention_size > 32) {
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continue;
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}
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uint32 next = 0;
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if (ptr != end) {
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next_utf8_unsafe(ptr, &next, "match_mentions 2");
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}
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if (is_word_character(next)) {
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continue;
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}
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result.emplace_back(mention_begin - 1, mention_end);
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}
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return result;
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}
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static vector<Slice> match_bot_commands(Slice str) {
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vector<Slice> result;
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const unsigned char *begin = str.ubegin();
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const unsigned char *end = str.uend();
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const unsigned char *ptr = begin;
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// '/(?<!\b|[\/<>])\/([a-zA-Z0-9_]{1,64})(?:@([a-zA-Z0-9_]{3,32}))?(?!\B|[\/<>])/u'
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while (true) {
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ptr = static_cast<const unsigned char *>(std::memchr(ptr, '/', narrow_cast<int32>(end - ptr)));
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if (ptr == nullptr) {
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break;
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}
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if (ptr != begin) {
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uint32 prev;
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next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_bot_commands");
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if (is_word_character(prev) || prev == '/' || prev == '<' || prev == '>') {
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ptr++;
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continue;
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}
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}
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auto command_begin = ++ptr;
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while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
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ptr++;
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}
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auto command_end = ptr;
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auto command_size = command_end - command_begin;
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if (command_size < 1 || command_size > 64) {
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continue;
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}
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if (ptr != end && *ptr == '@') {
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auto mention_begin = ++ptr;
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while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
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ptr++;
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}
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auto mention_end = ptr;
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auto mention_size = mention_end - mention_begin;
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if (mention_size < 3 || mention_size > 32) {
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continue;
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}
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command_end = ptr;
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}
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uint32 next = 0;
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if (ptr != end) {
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next_utf8_unsafe(ptr, &next, "match_bot_commands 2");
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}
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if (is_word_character(next) || next == '/' || next == '<' || next == '>') {
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continue;
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}
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result.emplace_back(command_begin - 1, command_end);
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}
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return result;
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}
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static bool is_hashtag_letter(uint32 c, UnicodeSimpleCategory &category) {
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category = get_unicode_simple_category(c);
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if (c == '_' || c == 0x200c) {
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return true;
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}
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switch (category) {
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case UnicodeSimpleCategory::DecimalNumber:
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case UnicodeSimpleCategory::Letter:
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return true;
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default:
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return false;
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}
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}
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static vector<Slice> match_hashtags(Slice str) {
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vector<Slice> result;
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const unsigned char *begin = str.ubegin();
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const unsigned char *end = str.uend();
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const unsigned char *ptr = begin;
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// '/(?<=^|[^\d_\pL\x{200c}])#([\d_\pL\x{200c}]{1,256})(?![\d_\pL\x{200c}]*#)/u'
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// and at least one letter
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UnicodeSimpleCategory category;
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while (true) {
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ptr = static_cast<const unsigned char *>(std::memchr(ptr, '#', narrow_cast<int32>(end - ptr)));
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if (ptr == nullptr) {
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break;
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}
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if (ptr != begin) {
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uint32 prev;
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next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_hashtags");
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if (is_hashtag_letter(prev, category)) {
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ptr++;
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continue;
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}
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}
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auto hashtag_begin = ++ptr;
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size_t hashtag_size = 0;
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const unsigned char *hashtag_end = nullptr;
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bool was_letter = false;
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while (ptr != end) {
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uint32 code;
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auto next_ptr = next_utf8_unsafe(ptr, &code, "match_hashtags 2");
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if (!is_hashtag_letter(code, category)) {
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break;
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}
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ptr = next_ptr;
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if (hashtag_size == 255) {
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hashtag_end = ptr;
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}
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if (hashtag_size != 256) {
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was_letter |= category == UnicodeSimpleCategory::Letter;
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hashtag_size++;
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}
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}
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if (!hashtag_end) {
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hashtag_end = ptr;
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}
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if (hashtag_size < 1) {
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continue;
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}
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if (ptr != end && ptr[0] == '#') {
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continue;
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}
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if (!was_letter) {
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continue;
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}
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result.emplace_back(hashtag_begin - 1, hashtag_end);
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}
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return result;
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}
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static vector<Slice> match_cashtags(Slice str) {
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vector<Slice> result;
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const unsigned char *begin = str.ubegin();
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const unsigned char *end = str.uend();
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const unsigned char *ptr = begin;
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// '/(?<=^|[^$\d_\pL\x{200c}])\$([A-Z]{3,8})(?![$\d_\pL\x{200c}])/u'
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UnicodeSimpleCategory category;
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while (true) {
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ptr = static_cast<const unsigned char *>(std::memchr(ptr, '$', narrow_cast<int32>(end - ptr)));
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if (ptr == nullptr) {
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break;
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}
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if (ptr != begin) {
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uint32 prev;
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next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_cashtags");
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if (is_hashtag_letter(prev, category) || prev == '$') {
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ptr++;
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continue;
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}
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}
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auto cashtag_begin = ++ptr;
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while (ptr != end && 'Z' >= *ptr && *ptr >= 'A') {
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ptr++;
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}
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auto cashtag_end = ptr;
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auto cashtag_size = cashtag_end - cashtag_begin;
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if (cashtag_size < 3 || cashtag_size > 8) {
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continue;
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}
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if (cashtag_end != end) {
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uint32 code;
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next_utf8_unsafe(ptr, &code, "match_cashtags 2");
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if (is_hashtag_letter(code, category) || code == '$') {
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continue;
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}
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}
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result.emplace_back(cashtag_begin - 1, cashtag_end);
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}
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return result;
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}
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static vector<Slice> match_bank_card_numbers(Slice str) {
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vector<Slice> result;
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const unsigned char *begin = str.ubegin();
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const unsigned char *end = str.uend();
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const unsigned char *ptr = begin;
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// '/(?<=^|[^+_\pL\d-.,])[\d -]{13,}([^_\pL\d-]|$)/'
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while (true) {
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while (ptr != end && !is_digit(*ptr)) {
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ptr++;
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}
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if (ptr == end) {
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break;
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}
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if (ptr != begin) {
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uint32 prev;
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next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_bank_card_numbers");
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if (prev == '.' || prev == ',' || prev == '+' || prev == '-' || prev == '_' ||
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get_unicode_simple_category(prev) == UnicodeSimpleCategory::Letter) {
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while (ptr != end && (is_digit(*ptr) || *ptr == ' ' || *ptr == '-')) {
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ptr++;
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}
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continue;
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}
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}
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auto card_number_begin = ptr;
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size_t digit_count = 0;
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while (ptr != end && (is_digit(*ptr) || *ptr == ' ' || *ptr == '-')) {
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if (*ptr == ' ' && digit_count >= 16 && digit_count <= 19 &&
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digit_count == static_cast<size_t>(ptr - card_number_begin)) {
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// continuous card number
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break;
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}
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digit_count += static_cast<size_t>(is_digit(*ptr));
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ptr++;
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}
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if (digit_count < 13 || digit_count > 19) {
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continue;
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}
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auto card_number_end = ptr;
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while (!is_digit(card_number_end[-1])) {
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card_number_end--;
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}
|
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auto card_number_size = static_cast<size_t>(card_number_end - card_number_begin);
|
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if (card_number_size > 2 * digit_count - 1) {
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continue;
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}
|
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if (card_number_end != end) {
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uint32 next;
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next_utf8_unsafe(card_number_end, &next, "match_bank_card_numbers 2");
|
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if (next == '-' || next == '_' || get_unicode_simple_category(next) == UnicodeSimpleCategory::Letter) {
|
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continue;
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}
|
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}
|
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result.emplace_back(card_number_begin, card_number_end);
|
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}
|
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return result;
|
||
}
|
||
|
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static vector<Slice> match_urls(Slice str) {
|
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vector<Slice> result;
|
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const unsigned char *begin = str.ubegin();
|
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const unsigned char *end = str.uend();
|
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|
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const auto &is_protocol_symbol = [](uint32 c) {
|
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if (c < 0x80) {
|
||
// do not allow dots in the protocol
|
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return is_alpha_digit(c) || c == '+' || c == '-';
|
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}
|
||
// add unicode letters and digits to later discard protocol as invalid
|
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return get_unicode_simple_category(c) != UnicodeSimpleCategory::Separator;
|
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};
|
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|
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const auto &is_user_data_symbol = [](uint32 c) {
|
||
switch (c) {
|
||
case '\n':
|
||
case '/':
|
||
case '[':
|
||
case ']':
|
||
case '{':
|
||
case '}':
|
||
case '(':
|
||
case ')':
|
||
case '\'':
|
||
case '`':
|
||
case '<':
|
||
case '>':
|
||
case '"':
|
||
case 0xab: // «
|
||
case 0xbb: // »
|
||
return false;
|
||
default:
|
||
if (0x2000 <= c && c <= 0x206f) { // General Punctuation
|
||
return c == 0x200c || c == 0x200d; // Zero Width Non-Joiner/Joiner
|
||
}
|
||
return get_unicode_simple_category(c) != UnicodeSimpleCategory::Separator;
|
||
}
|
||
};
|
||
|
||
const auto &is_domain_symbol = [](uint32 c) {
|
||
if (c < 0xc0) {
|
||
return c == '.' || is_alpha_digit_or_underscore_or_minus(c) || c == '~';
|
||
}
|
||
if (0x2000 <= c && c <= 0x206f) { // General Punctuation
|
||
return c == 0x200c || c == 0x200d; // Zero Width Non-Joiner/Joiner
|
||
}
|
||
return get_unicode_simple_category(c) != UnicodeSimpleCategory::Separator;
|
||
};
|
||
|
||
const auto &is_path_symbol = [](uint32 c) {
|
||
switch (c) {
|
||
case '\n':
|
||
case '<':
|
||
case '>':
|
||
case '"':
|
||
case 0xab: // «
|
||
case 0xbb: // »
|
||
return false;
|
||
default:
|
||
if (0x2000 <= c && c <= 0x206f) { // General Punctuation
|
||
return c == 0x200c || c == 0x200d; // Zero Width Non-Joiner/Joiner
|
||
}
|
||
return get_unicode_simple_category(c) != UnicodeSimpleCategory::Separator;
|
||
}
|
||
};
|
||
|
||
Slice bad_path_end_chars(".:;,('?!`");
|
||
|
||
while (true) {
|
||
auto dot_pos = str.find('.');
|
||
if (dot_pos > str.size() || dot_pos + 1 == str.size()) {
|
||
break;
|
||
}
|
||
if (str[dot_pos + 1] == ' ') {
|
||
// fast path
|
||
str = str.substr(dot_pos + 2);
|
||
begin = str.ubegin();
|
||
continue;
|
||
}
|
||
|
||
const unsigned char *last_at_ptr = nullptr;
|
||
const unsigned char *domain_end_ptr = begin + dot_pos;
|
||
while (domain_end_ptr != end) {
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(domain_end_ptr, &code, "match_urls");
|
||
if (code == '@') {
|
||
last_at_ptr = domain_end_ptr;
|
||
}
|
||
if (!is_user_data_symbol(code)) {
|
||
break;
|
||
}
|
||
domain_end_ptr = next_ptr;
|
||
}
|
||
domain_end_ptr = last_at_ptr == nullptr ? begin + dot_pos : last_at_ptr + 1;
|
||
while (domain_end_ptr != end) {
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(domain_end_ptr, &code, "match_urls 2");
|
||
if (!is_domain_symbol(code)) {
|
||
break;
|
||
}
|
||
domain_end_ptr = next_ptr;
|
||
}
|
||
|
||
const unsigned char *domain_begin_ptr = begin + dot_pos;
|
||
while (domain_begin_ptr != begin) {
|
||
domain_begin_ptr = prev_utf8_unsafe(domain_begin_ptr);
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(domain_begin_ptr, &code, "match_urls 3");
|
||
if (last_at_ptr == nullptr ? !is_domain_symbol(code) : !is_user_data_symbol(code)) {
|
||
domain_begin_ptr = next_ptr;
|
||
break;
|
||
}
|
||
}
|
||
// LOG(ERROR) << "Domain: " << Slice(domain_begin_ptr, domain_end_ptr);
|
||
|
||
const unsigned char *url_end_ptr = domain_end_ptr;
|
||
if (url_end_ptr != end && url_end_ptr[0] == ':') {
|
||
auto port_end_ptr = url_end_ptr + 1;
|
||
|
||
while (port_end_ptr != end && is_digit(port_end_ptr[0])) {
|
||
port_end_ptr++;
|
||
}
|
||
|
||
auto port_begin_ptr = url_end_ptr + 1;
|
||
while (port_begin_ptr != port_end_ptr && *port_begin_ptr == '0') {
|
||
port_begin_ptr++;
|
||
}
|
||
if (port_begin_ptr != port_end_ptr && narrow_cast<int>(port_end_ptr - port_begin_ptr) <= 5 &&
|
||
to_integer<uint32>(Slice(port_begin_ptr, port_end_ptr)) <= 65535) {
|
||
url_end_ptr = port_end_ptr;
|
||
}
|
||
}
|
||
// LOG(ERROR) << "Domain_port: " << Slice(domain_begin_ptr, url_end_ptr);
|
||
|
||
if (url_end_ptr != end && (url_end_ptr[0] == '/' || url_end_ptr[0] == '?' || url_end_ptr[0] == '#')) {
|
||
auto path_end_ptr = url_end_ptr + 1;
|
||
while (path_end_ptr != end) {
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(path_end_ptr, &code, "match_urls 4");
|
||
if (!is_path_symbol(code)) {
|
||
break;
|
||
}
|
||
path_end_ptr = next_ptr;
|
||
}
|
||
while (bad_path_end_chars.find(path_end_ptr[-1]) < bad_path_end_chars.size()) {
|
||
path_end_ptr--;
|
||
}
|
||
if (url_end_ptr[0] == '/' || path_end_ptr > url_end_ptr + 1) {
|
||
url_end_ptr = path_end_ptr;
|
||
}
|
||
}
|
||
while (url_end_ptr > begin + dot_pos + 1 && url_end_ptr[-1] == '.') {
|
||
url_end_ptr--;
|
||
}
|
||
// LOG(ERROR) << "Domain_port_path: " << Slice(domain_begin_ptr, url_end_ptr);
|
||
|
||
bool is_bad = false;
|
||
const unsigned char *url_begin_ptr = domain_begin_ptr;
|
||
if (url_begin_ptr != begin && url_begin_ptr[-1] == '@') {
|
||
auto user_data_begin_ptr = url_begin_ptr - 1;
|
||
while (user_data_begin_ptr != begin) {
|
||
user_data_begin_ptr = prev_utf8_unsafe(user_data_begin_ptr);
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(user_data_begin_ptr, &code, "match_urls 5");
|
||
if (!is_user_data_symbol(code)) {
|
||
user_data_begin_ptr = next_ptr;
|
||
break;
|
||
}
|
||
}
|
||
if (user_data_begin_ptr == url_begin_ptr - 1) {
|
||
is_bad = true;
|
||
}
|
||
url_begin_ptr = user_data_begin_ptr;
|
||
}
|
||
// LOG(ERROR) << "User_data_port_path: " << Slice(url_begin_ptr, url_end_ptr);
|
||
|
||
if (url_begin_ptr != begin) {
|
||
Slice prefix(begin, url_begin_ptr);
|
||
if (prefix.size() >= 6 && ends_with(prefix, "://")) {
|
||
auto protocol_begin_ptr = url_begin_ptr - 3;
|
||
while (protocol_begin_ptr != begin) {
|
||
protocol_begin_ptr = prev_utf8_unsafe(protocol_begin_ptr);
|
||
uint32 code = 0;
|
||
auto next_ptr = next_utf8_unsafe(protocol_begin_ptr, &code, "match_urls 6");
|
||
if (!is_protocol_symbol(code)) {
|
||
protocol_begin_ptr = next_ptr;
|
||
break;
|
||
}
|
||
}
|
||
auto protocol = to_lower(Slice(protocol_begin_ptr, url_begin_ptr - 3));
|
||
if (ends_with(protocol, "http") && protocol != "shttp") {
|
||
url_begin_ptr = url_begin_ptr - 7;
|
||
} else if (ends_with(protocol, "https")) {
|
||
url_begin_ptr = url_begin_ptr - 8;
|
||
} else if (ends_with(protocol, "sftp")) {
|
||
url_begin_ptr = url_begin_ptr - 7;
|
||
} else if (ends_with(protocol, "ftp") && protocol != "tftp") {
|
||
url_begin_ptr = url_begin_ptr - 6;
|
||
} else {
|
||
is_bad = true;
|
||
}
|
||
} else {
|
||
auto prefix_end = prefix.uend();
|
||
auto prefix_back = prev_utf8_unsafe(prefix_end);
|
||
uint32 code = 0;
|
||
next_utf8_unsafe(prefix_back, &code, "match_urls 7");
|
||
if (is_word_character(code) || code == '/' || code == '#' || code == '@') {
|
||
is_bad = true;
|
||
}
|
||
}
|
||
}
|
||
// LOG(ERROR) << "Full: " << Slice(url_begin_ptr, url_end_ptr) << " " << is_bad;
|
||
|
||
if (!is_bad) {
|
||
if (url_end_ptr > begin + dot_pos + 1) {
|
||
result.emplace_back(url_begin_ptr, url_end_ptr);
|
||
}
|
||
while (url_end_ptr != end && url_end_ptr[0] == '.') {
|
||
url_end_ptr++;
|
||
}
|
||
} else {
|
||
while (url_end_ptr[-1] != '.') {
|
||
url_end_ptr--;
|
||
}
|
||
}
|
||
|
||
if (url_end_ptr <= begin + dot_pos) {
|
||
url_end_ptr = begin + dot_pos + 1;
|
||
}
|
||
str = str.substr(url_end_ptr - begin);
|
||
begin = url_end_ptr;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
static bool is_valid_bank_card(Slice str) {
|
||
const size_t MIN_CARD_LENGTH = 13;
|
||
const size_t MAX_CARD_LENGTH = 19;
|
||
char digits[MAX_CARD_LENGTH];
|
||
size_t digit_count = 0;
|
||
for (auto c : str) {
|
||
if (is_digit(c)) {
|
||
CHECK(digit_count < MAX_CARD_LENGTH);
|
||
digits[digit_count++] = c;
|
||
}
|
||
}
|
||
CHECK(digit_count >= MIN_CARD_LENGTH);
|
||
|
||
// Luhn algorithm
|
||
int32 sum = 0;
|
||
for (size_t i = digit_count; i > 0; i--) {
|
||
int32 digit = digits[i - 1] - '0';
|
||
if ((digit_count - i) % 2 == 0) {
|
||
sum += digit;
|
||
} else {
|
||
sum += (digit < 5 ? 2 * digit : 2 * digit - 9);
|
||
}
|
||
}
|
||
if (sum % 10 != 0) {
|
||
return false;
|
||
}
|
||
|
||
int32 prefix1 = (digits[0] - '0');
|
||
int32 prefix2 = prefix1 * 10 + (digits[1] - '0');
|
||
int32 prefix3 = prefix2 * 10 + (digits[2] - '0');
|
||
int32 prefix4 = prefix3 * 10 + (digits[3] - '0');
|
||
if (prefix1 == 4) {
|
||
// Visa
|
||
return digit_count == 13 || digit_count == 16 || digit_count == 18 || digit_count == 19;
|
||
}
|
||
if ((51 <= prefix2 && prefix2 <= 55) || (2221 <= prefix4 && prefix4 <= 2720)) {
|
||
// mastercard
|
||
return digit_count == 16;
|
||
}
|
||
if (prefix2 == 34 || prefix2 == 37) {
|
||
// American Express
|
||
return digit_count == 15;
|
||
}
|
||
if (prefix2 == 62 || prefix2 == 81) {
|
||
// UnionPay
|
||
return digit_count >= 16;
|
||
}
|
||
if (2200 <= prefix4 && prefix4 <= 2204) {
|
||
// MIR
|
||
return digit_count == 16;
|
||
}
|
||
return true; // skip length check
|
||
}
|
||
|
||
bool is_email_address(Slice str) {
|
||
// /^([a-z0-9_-]{0,26}[.+]){0,10}[a-z0-9_-]{1,35}@(([a-z0-9][a-z0-9_-]{0,28})?[a-z0-9][.]){1,6}[a-z]{2,6}$/i
|
||
Slice userdata;
|
||
Slice domain;
|
||
std::tie(userdata, domain) = split(str, '@');
|
||
vector<Slice> userdata_parts;
|
||
size_t prev = 0;
|
||
for (size_t i = 0; i < userdata.size(); i++) {
|
||
if (userdata[i] == '.' || userdata[i] == '+') {
|
||
userdata_parts.push_back(userdata.substr(prev, i - prev));
|
||
prev = i + 1;
|
||
}
|
||
}
|
||
userdata_parts.push_back(userdata.substr(prev));
|
||
if (userdata_parts.size() >= 12) {
|
||
return false;
|
||
}
|
||
for (auto &part : userdata_parts) {
|
||
for (auto c : part) {
|
||
if (!is_alpha_digit_or_underscore_or_minus(c)) {
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
if (userdata_parts.back().empty() || userdata_parts.back().size() >= 36) {
|
||
return false;
|
||
}
|
||
userdata_parts.pop_back();
|
||
for (auto &part : userdata_parts) {
|
||
if (part.size() >= 27) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
vector<Slice> domain_parts = full_split(domain, '.');
|
||
if (domain_parts.size() <= 1 || domain_parts.size() > 7) {
|
||
return false;
|
||
}
|
||
if (domain_parts.back().size() <= 1 || domain_parts.back().size() >= 7) {
|
||
return false;
|
||
}
|
||
for (auto c : domain_parts.back()) {
|
||
if (!is_alpha(c)) {
|
||
return false;
|
||
}
|
||
}
|
||
domain_parts.pop_back();
|
||
for (auto &part : domain_parts) {
|
||
if (part.empty() || part.size() >= 31) {
|
||
return false;
|
||
}
|
||
for (auto c : part) {
|
||
if (!is_alpha_digit_or_underscore_or_minus(c)) {
|
||
return false;
|
||
}
|
||
}
|
||
if (!is_alpha_digit(part[0])) {
|
||
return false;
|
||
}
|
||
if (!is_alpha_digit(part.back())) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static bool is_common_tld(Slice str) {
|
||
static const std::unordered_set<Slice, SliceHash> tlds(
|
||
{"aaa", "aarp", "abarth", "abb", "abbott", "abbvie", "abc", "able", "abogado", "abudhabi", "ac", "academy",
|
||
"accenture", "accountant", "accountants", "aco", "active", "actor", "ad", "adac", "ads", "adult", "ae", "aeg",
|
||
"aero", "aetna", "af", "afamilycompany", "afl", "africa", "ag", "agakhan", "agency", "ai", "aig", "aigo",
|
||
"airbus", "airforce", "airtel", "akdn", "al", "alfaromeo", "alibaba", "alipay", "allfinanz", "allstate", "ally",
|
||
"alsace", "alstom", "am", "americanexpress", "americanfamily", "amex", "amfam", "amica", "amsterdam",
|
||
"analytics", "android", "anquan", "anz", "ao", "aol", "apartments", "app", "apple", "aq", "aquarelle", "ar",
|
||
"arab", "aramco", "archi", "army", "arpa", "art", "arte", "as", "asda", "asia", "associates", "at", "athleta",
|
||
"attorney", "au", "auction", "audi", "audible", "audio", "auspost", "author", "auto", "autos", "avianca", "aw",
|
||
"aws", "ax", "axa", "az", "azure", "ba", "baby", "baidu", "banamex", "bananarepublic", "band", "bank", "bar",
|
||
"barcelona", "barclaycard", "barclays", "barefoot", "bargains", "baseball", "basketball", "bauhaus", "bayern",
|
||
"bb", "bbc", "bbt", "bbva", "bcg", "bcn", "bd", "be", "beats", "beauty", "beer", "bentley", "berlin", "best",
|
||
"bestbuy", "bet", "bf", "bg", "bh", "bharti", "bi", "bible", "bid", "bike", "bing", "bingo", "bio", "biz", "bj",
|
||
"black", "blackfriday", "blanco", "blockbuster", "blog", "bloomberg", "blue", "bm", "bms", "bmw", "bn", "bnl",
|
||
"bnpparibas", "bo", "boats", "boehringer", "bofa", "bom", "bond", "boo", "book", "booking", "boots", "bosch",
|
||
"bostik", "boston", "bot", "boutique", "box", "br", "bradesco", "bridgestone", "broadway", "broker", "brother",
|
||
"brussels", "bs", "bt", "budapest", "bugatti", "build", "builders", "business", "buy", "buzz", "bv", "bw", "by",
|
||
"bz", "bzh", "ca", "cab", "cafe", "cal", "call", "calvinklein", "cam", "camera", "camp", "cancerresearch",
|
||
"canon", "capetown", "capital", "capitalone", "car", "caravan", "cards", "care", "career", "careers", "cars",
|
||
"cartier", "casa", "case", "caseih", "cash", "casino", "cat", "catering", "catholic", "cba", "cbn", "cbre",
|
||
"cbs", "cc", "cd", "ceb", "center", "ceo", "cern", "cf", "cfa", "cfd", "cg", "ch", "chanel", "channel", "chase",
|
||
"chat", "cheap", "chintai", "christmas", "chrome", "chrysler", "church", "ci", "cipriani", "circle", "cisco",
|
||
"citadel", "citi", "citic", "city", "cityeats", "ck", "cl", "claims", "cleaning", "click", "clinic", "clinique",
|
||
"clothing", "cloud", "club", "clubmed", "cm", "cn", "co", "coach", "codes", "coffee", "college", "cologne",
|
||
"com", "comcast", "commbank", "community", "company", "compare", "computer", "comsec", "condos", "construction",
|
||
"consulting", "contact", "contractors", "cooking", "cookingchannel", "cool", "coop", "corsica", "country",
|
||
"coupon", "coupons", "courses", "cr", "credit", "creditcard", "creditunion", "cricket", "crown", "crs", "cruise",
|
||
"cruises", "csc", "cu", "cuisinella", "cv", "cw", "cx", "cy", "cymru", "cyou", "cz", "dabur", "dad", "dance",
|
||
"data", "date", "dating", "datsun", "day", "dclk", "dds", "de", "deal", "dealer", "deals", "degree", "delivery",
|
||
"dell", "deloitte", "delta", "democrat", "dental", "dentist", "desi", "design", "dev", "dhl", "diamonds", "diet",
|
||
"digital", "direct", "directory", "discount", "discover", "dish", "diy", "dj", "dk", "dm", "dnp", "do", "docs",
|
||
"doctor", "dodge", "dog", "doha", "domains", "dot", "download", "drive", "dtv", "dubai", "duck", "dunlop",
|
||
"duns", "dupont", "durban", "dvag", "dvr", "dz", "earth", "eat", "ec", "eco", "edeka", "edu", "education", "ee",
|
||
"eg", "email", "emerck", "energy", "engineer", "engineering", "enterprises", "epost", "epson", "equipment", "er",
|
||
"ericsson", "erni", "es", "esq", "estate", "esurance", "et", "etisalat", "eu", "eurovision", "eus", "events",
|
||
"everbank", "exchange", "expert", "exposed", "express", "extraspace", "fage", "fail", "fairwinds", "faith",
|
||
"family", "fan", "fans", "farm", "farmers", "fashion", "fast", "fedex", "feedback", "ferrari", "ferrero", "fi",
|
||
"fiat", "fidelity", "fido", "film", "final", "finance", "financial", "fire", "firestone", "firmdale", "fish",
|
||
"fishing", "fit", "fitness", "fj", "fk", "flickr", "flights", "flir", "florist", "flowers", "fly", "fm", "fo",
|
||
"foo", "food", "foodnetwork", "football", "ford", "forex", "forsale", "forum", "foundation", "fox", "fr", "free",
|
||
"fresenius", "frl", "frogans", "frontdoor", "frontier", "ftr", "fujitsu", "fujixerox", "fun", "fund",
|
||
"furniture", "futbol", "fyi", "ga", "gal", "gallery", "gallo", "gallup", "game", "games", "gap", "garden", "gb",
|
||
"gbiz", "gd", "gdn", "ge", "gea", "gent", "genting", "george", "gf", "gg", "ggee", "gh", "gi", "gift", "gifts",
|
||
"gives", "giving", "gl", "glade", "glass", "gle", "global", "globo", "gm", "gmail", "gmbh", "gmo", "gmx", "gn",
|
||
"godaddy", "gold", "goldpoint", "golf", "goo", "goodhands", "goodyear", "goog", "google", "gop", "got", "gov",
|
||
"gp", "gq", "gr", "grainger", "graphics", "gratis", "green", "gripe", "grocery", "group", "gs", "gt", "gu",
|
||
"guardian", "gucci", "guge", "guide", "guitars", "guru", "gw", "gy", "hair", "hamburg", "hangout", "haus", "hbo",
|
||
"hdfc", "hdfcbank", "health", "healthcare", "help", "helsinki", "here", "hermes", "hgtv", "hiphop", "hisamitsu",
|
||
"hitachi", "hiv", "hk", "hkt", "hm", "hn", "hockey", "holdings", "holiday", "homedepot", "homegoods", "homes",
|
||
"homesense", "honda", "honeywell", "horse", "hospital", "host", "hosting", "hot", "hoteles", "hotels", "hotmail",
|
||
"house", "how", "hr", "hsbc", "ht", "hu", "hughes", "hyatt", "hyundai", "ibm", "icbc", "ice", "icu", "id", "ie",
|
||
"ieee", "ifm", "ikano", "il", "im", "imamat", "imdb", "immo", "immobilien", "in", "industries", "infiniti",
|
||
"info", "ing", "ink", "institute", "insurance", "insure", "int", "intel", "international", "intuit",
|
||
"investments", "io", "ipiranga", "iq", "ir", "irish", "is", "iselect", "ismaili", "ist", "istanbul", "it",
|
||
"itau", "itv", "iveco", "iwc", "jaguar", "java", "jcb", "jcp", "je", "jeep", "jetzt", "jewelry", "jio", "jlc",
|
||
"jll", "jm", "jmp", "jnj", "jo", "jobs", "joburg", "jot", "joy", "jp", "jpmorgan", "jprs", "juegos", "juniper",
|
||
"kaufen", "kddi", "ke", "kerryhotels", "kerrylogistics", "kerryproperties", "kfh", "kg", "kh", "ki", "kia",
|
||
"kim", "kinder", "kindle", "kitchen", "kiwi", "km", "kn", "koeln", "komatsu", "kosher", "kp", "kpmg", "kpn",
|
||
"kr", "krd", "kred", "kuokgroup", "kw", "ky", "kyoto", "kz", "la", "lacaixa", "ladbrokes", "lamborghini",
|
||
"lamer", "lancaster", "lancia", "lancome", "land", "landrover", "lanxess", "lasalle", "lat", "latino", "latrobe",
|
||
"law", "lawyer", "lb", "lc", "lds", "lease", "leclerc", "lefrak", "legal", "lego", "lexus", "lgbt", "li",
|
||
"liaison", "lidl", "life", "lifeinsurance", "lifestyle", "lighting", "like", "lilly", "limited", "limo",
|
||
"lincoln", "linde", "link", "lipsy", "live", "living", "lixil", "lk", "loan", "loans", "locker", "locus", "loft",
|
||
"lol", "london", "lotte", "lotto", "love", "lpl", "lplfinancial", "lr", "ls", "lt", "ltd", "ltda", "lu",
|
||
"lundbeck", "lupin", "luxe", "luxury", "lv", "ly", "ma", "macys", "madrid", "maif", "maison", "makeup", "man",
|
||
"management", "mango", "map", "market", "marketing", "markets", "marriott", "marshalls", "maserati", "mattel",
|
||
"mba", "mc", "mckinsey", "md", "me", "med", "media", "meet", "melbourne", "meme", "memorial", "men", "menu",
|
||
"meo", "merckmsd", "metlife", "mg", "mh", "miami", "microsoft", "mil", "mini", "mint", "mit", "mitsubishi", "mk",
|
||
"ml", "mlb", "mls", "mm", "mma", "mn", "mo", "mobi", "mobile", "mobily", "moda", "moe", "moi", "mom", "monash",
|
||
"money", "monster", "mopar", "mormon", "mortgage", "moscow", "moto", "motorcycles", "mov", "movie", "movistar",
|
||
"mp", "mq", "mr", "ms", "msd", "mt", "mtn", "mtr", "mu", "museum", "mutual", "mv", "mw", "mx", "my", "mz", "na",
|
||
"nab", "nadex", "nagoya", "name", "nationwide", "natura", "navy", "nba", "nc", "ne", "nec", "net", "netbank",
|
||
"netflix", "network", "neustar", "new", "newholland", "news", "next", "nextdirect", "nexus", "nf", "nfl", "ng",
|
||
"ngo", "nhk", "ni", "nico", "nike", "nikon", "ninja", "nissan", "nissay", "nl", "no", "nokia",
|
||
"northwesternmutual", "norton", "now", "nowruz", "nowtv", "np", "nr", "nra", "nrw", "ntt", "nu", "nyc", "nz",
|
||
"obi", "observer", "off", "office", "okinawa", "olayan", "olayangroup", "oldnavy", "ollo", "om", "omega", "one",
|
||
"ong", "onion", "onl", "online", "onyourside", "ooo", "open", "oracle", "orange", "org", "organic", "origins",
|
||
"osaka", "otsuka", "ott", "ovh", "pa", "page", "panasonic", "panerai", "paris", "pars", "partners", "parts",
|
||
"party", "passagens", "pay", "pccw", "pe", "pet", "pf", "pfizer", "pg", "ph", "pharmacy", "phd", "philips",
|
||
"phone", "photo", "photography", "photos", "physio", "piaget", "pics", "pictet", "pictures", "pid", "pin",
|
||
"ping", "pink", "pioneer", "pizza", "pk", "pl", "place", "play", "playstation", "plumbing", "plus", "pm", "pn",
|
||
"pnc", "pohl", "poker", "politie", "porn", "post", "pr", "pramerica", "praxi", "press", "prime", "pro", "prod",
|
||
"productions", "prof", "progressive", "promo", "properties", "property", "protection", "pru", "prudential", "ps",
|
||
"pt", "pub", "pw", "pwc", "py", "qa", "qpon", "quebec", "quest", "qvc", "racing", "radio", "raid", "re", "read",
|
||
"realestate", "realtor", "realty", "recipes", "red", "redstone", "redumbrella", "rehab", "reise", "reisen",
|
||
"reit", "reliance", "ren", "rent", "rentals", "repair", "report", "republican", "rest", "restaurant", "review",
|
||
"reviews", "rexroth", "rich", "richardli", "ricoh", "rightathome", "ril", "rio", "rip", "rmit", "ro", "rocher",
|
||
"rocks", "rodeo", "rogers", "room", "rs", "rsvp", "ru", "rugby", "ruhr", "run", "rw", "rwe", "ryukyu", "sa",
|
||
"saarland", "safe", "safety", "sakura", "sale", "salon", "samsclub", "samsung", "sandvik", "sandvikcoromant",
|
||
"sanofi", "sap", "sapo", "sarl", "sas", "save", "saxo", "sb", "sbi", "sbs", "sc", "sca", "scb", "schaeffler",
|
||
"schmidt", "scholarships", "school", "schule", "schwarz", "science", "scjohnson", "scor", "scot", "sd", "se",
|
||
"search", "seat", "secure", "security", "seek", "select", "sener", "services", "ses", "seven", "sew", "sex",
|
||
"sexy", "sfr", "sg", "sh", "shangrila", "sharp", "shaw", "shell", "shia", "shiksha", "shoes", "shop", "shopping",
|
||
"shouji", "show", "showtime", "shriram", "si", "silk", "sina", "singles", "site", "sj", "sk", "ski", "skin",
|
||
"sky", "skype", "sl", "sling", "sm", "smart", "smile", "sn", "sncf", "so", "soccer", "social", "softbank",
|
||
"software", "sohu", "solar", "solutions", "song", "sony", "soy", "space", "spiegel", "sport", "spot",
|
||
"spreadbetting", "sr", "srl", "srt", "st", "stada", "staples", "star", "starhub", "statebank", "statefarm",
|
||
"statoil", "stc", "stcgroup", "stockholm", "storage", "store", "stream", "studio", "study", "style", "su",
|
||
"sucks", "supplies", "supply", "support", "surf", "surgery", "suzuki", "sv", "swatch", "swiftcover", "swiss",
|
||
"sx", "sy", "sydney", "symantec", "systems", "sz", "tab", "taipei", "talk", "taobao", "target", "tatamotors",
|
||
"tatar", "tattoo", "tax", "taxi", "tc", "tci", "td", "tdk", "team", "tech", "technology", "tel", "telecity",
|
||
"telefonica", "temasek", "tennis", "teva", "tf", "tg", "th", "thd", "theater", "theatre", "tiaa", "tickets",
|
||
"tienda", "tiffany", "tips", "tires", "tirol", "tj", "tjmaxx", "tjx", "tk", "tkmaxx", "tl", "tm", "tmall", "tn",
|
||
"to", "today", "tokyo", "tools", "top", "toray", "toshiba", "total", "tours", "town", "toyota", "toys", "tr",
|
||
"trade", "trading", "training", "travel", "travelchannel", "travelers", "travelersinsurance", "trust", "trv",
|
||
"tt", "tube", "tui", "tunes", "tushu", "tv", "tvs", "tw", "tz", "ua", "ubank", "ubs", "uconnect", "ug", "uk",
|
||
"unicom", "university", "uno", "uol", "ups", "us", "uy", "uz", "va", "vacations", "vana", "vanguard", "vc", "ve",
|
||
"vegas", "ventures", "verisign", "versicherung", "vet", "vg", "vi", "viajes", "video", "vig", "viking", "villas",
|
||
"vin", "vip", "virgin", "visa", "vision", "vista", "vistaprint", "viva", "vivo", "vlaanderen", "vn", "vodka",
|
||
"volkswagen", "volvo", "vote", "voting", "voto", "voyage", "vu", "vuelos", "wales", "walmart", "walter", "wang",
|
||
"wanggou", "warman", "watch", "watches", "weather", "weatherchannel", "webcam", "weber", "website", "wed",
|
||
"wedding", "weibo", "weir", "wf", "whoswho", "wien", "wiki", "williamhill", "win", "windows", "wine", "winners",
|
||
"wme", "wolterskluwer", "woodside", "work", "works", "world", "wow", "ws", "wtc", "wtf", "xbox", "xerox",
|
||
"xfinity", "xihuan", "xin", "कॉम", "セール", "佛山", "ಭಾರತ", "慈善", "集团", "在线", "한국", "ଭାରତ", "大众汽车",
|
||
"点看", "คอม", "ভাৰত", "ভারত", "八卦", "موقع", "বাংলা", "公益", "公司", "香格里拉", "网站", "移动", "我爱你",
|
||
"москва", "қаз", "католик", "онлайн", "сайт", "联通", "срб", "бг", "бел", "קום", "时尚", "微博", "淡马锡",
|
||
"ファッション", "орг", "नेट", "ストア", "삼성", "சிங்கப்பூர்", "商标", "商店", "商城", "дети", "мкд", "ею",
|
||
"ポイント", "新闻", "工行", "家電", "كوم", "中文网", "中信", "中国", "中國", "娱乐", "谷歌", "భారత్", "ලංකා",
|
||
"電訊盈科", "购物", "クラウド", "ભારત", "通販", "भारतम्", "भारत", "भारोत", "网店", "संगठन", "餐厅", "网络", "ком",
|
||
"укр", "香港", "诺基亚", "食品", "飞利浦", "台湾", "台灣", "手表", "手机", "мон", "الجزائر", "عمان", "ارامكو",
|
||
"ایران", "العليان", "اتصالات", "امارات", "بازار", "پاکستان", "الاردن", "موبايلي", "بارت", "بھارت", "المغرب",
|
||
"ابوظبي", "السعودية", "ڀارت", "كاثوليك", "سودان", "همراه", "عراق", "مليسيا", "澳門", "닷컴", "政府", "شبكة",
|
||
"بيتك", "عرب", "გე", "机构", "组织机构", "健康", "ไทย", "سورية", "招聘", "рус", "рф", "珠宝", "تونس", "大拿",
|
||
"みんな", "グーグル", "ελ", "世界", "書籍", "ഭാരതം", "ਭਾਰਤ", "网址", "닷넷", "コム", "天主教", "游戏",
|
||
"vermögensberater", "vermögensberatung", "企业", "信息", "嘉里大酒店", "嘉里", "مصر", "قطر", "广东", "இலங்கை",
|
||
"இந்தியா", "հայ", "新加坡", "فلسطين", "政务", "xperia", "xxx", "xyz", "yachts", "yahoo", "yamaxun", "yandex",
|
||
"ye", "yodobashi", "yoga", "yokohama", "you", "youtube", "yt", "yun", "za", "zappos", "zara", "zero", "zip",
|
||
"zippo", "zm", "zone", "zuerich",
|
||
// comment for clang-format to prevent him from placing all strings on separate lines
|
||
"zw"});
|
||
string str_lower = utf8_to_lower(str);
|
||
if (str_lower != str && utf8_substr(Slice(str_lower), 1) == utf8_substr(str, 1)) {
|
||
return false;
|
||
}
|
||
return tlds.count(str_lower) > 0;
|
||
}
|
||
|
||
Slice fix_url(Slice str) {
|
||
auto full_url = str;
|
||
|
||
bool has_protocol = false;
|
||
auto str_begin = to_lower(str.substr(0, 8));
|
||
if (begins_with(str_begin, "http://") || begins_with(str_begin, "https://") || begins_with(str_begin, "sftp://") ||
|
||
begins_with(str_begin, "ftp://")) {
|
||
auto pos = str.find(':');
|
||
str = str.substr(pos + 3);
|
||
has_protocol = true;
|
||
}
|
||
auto domain_end = std::min({str.size(), str.find('/'), str.find('?'), str.find('#')}); // TODO server: str.find('#')
|
||
auto domain = str.substr(0, domain_end);
|
||
auto path = str.substr(domain_end);
|
||
|
||
auto at_pos = domain.find('@');
|
||
if (at_pos < domain.size()) {
|
||
domain.remove_prefix(at_pos + 1);
|
||
}
|
||
domain.truncate(domain.rfind(':'));
|
||
|
||
string domain_lower = domain.str();
|
||
to_lower_inplace(domain_lower);
|
||
if (domain_lower == "teiegram.org") {
|
||
return Slice();
|
||
}
|
||
|
||
int32 balance[3] = {0, 0, 0};
|
||
size_t path_pos;
|
||
for (path_pos = 0; path_pos < path.size(); path_pos++) {
|
||
switch (path[path_pos]) {
|
||
case '(':
|
||
balance[0]++;
|
||
break;
|
||
case '[':
|
||
balance[1]++;
|
||
break;
|
||
case '{':
|
||
balance[2]++;
|
||
break;
|
||
case ')':
|
||
balance[0]--;
|
||
break;
|
||
case ']':
|
||
balance[1]--;
|
||
break;
|
||
case '}':
|
||
balance[2]--;
|
||
break;
|
||
}
|
||
if (balance[0] < 0 || balance[1] < 0 || balance[2] < 0) {
|
||
break;
|
||
}
|
||
}
|
||
Slice bad_path_end_chars(".:;,('?!`");
|
||
while (path_pos > 0 && bad_path_end_chars.find(path[path_pos - 1]) < bad_path_end_chars.size()) {
|
||
path_pos--;
|
||
}
|
||
full_url.remove_suffix(path.size() - path_pos);
|
||
|
||
vector<Slice> domain_parts = full_split(domain, '.');
|
||
if (domain_parts.size() <= 1) {
|
||
return Slice();
|
||
}
|
||
|
||
bool is_ipv4 = domain_parts.size() == 4;
|
||
bool has_non_digit = false;
|
||
for (auto &part : domain_parts) {
|
||
if (part.empty() || part.size() >= 64) {
|
||
return Slice();
|
||
}
|
||
if (part.back() == '-') {
|
||
return Slice();
|
||
}
|
||
|
||
if (!has_non_digit) {
|
||
if (part.size() > 3) {
|
||
is_ipv4 = false;
|
||
}
|
||
for (auto c : part) {
|
||
if (!is_digit(c)) {
|
||
is_ipv4 = false;
|
||
has_non_digit = true;
|
||
}
|
||
}
|
||
if (part.size() == 3 &&
|
||
(part[0] >= '3' || (part[0] == '2' && (part[1] >= '6' || (part[1] == '5' && part[2] >= '6'))))) {
|
||
is_ipv4 = false;
|
||
}
|
||
if (part[0] == '0' && part.size() >= 2) {
|
||
is_ipv4 = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (is_ipv4) {
|
||
return full_url;
|
||
}
|
||
|
||
if (!has_non_digit) {
|
||
return Slice();
|
||
}
|
||
|
||
auto tld = domain_parts.back();
|
||
if (utf8_length(tld) <= 1) {
|
||
return Slice();
|
||
}
|
||
|
||
if (begins_with(tld, "xn--")) {
|
||
if (tld.size() <= 5) {
|
||
return Slice();
|
||
}
|
||
for (auto c : tld.substr(4)) {
|
||
if (!is_alpha_digit(c)) {
|
||
return Slice();
|
||
}
|
||
}
|
||
} else {
|
||
if (tld.find('_') < tld.size()) {
|
||
return Slice();
|
||
}
|
||
if (tld.find('-') < tld.size()) {
|
||
return Slice();
|
||
}
|
||
|
||
if (!has_protocol && !is_common_tld(tld)) {
|
||
return Slice();
|
||
}
|
||
}
|
||
|
||
domain_parts.pop_back();
|
||
if (domain_parts.back().find('_') < domain_parts.back().size()) {
|
||
return Slice();
|
||
}
|
||
|
||
return full_url;
|
||
}
|
||
|
||
const std::unordered_set<Slice, SliceHash> &get_valid_short_usernames() {
|
||
static const std::unordered_set<Slice, SliceHash> valid_usernames{"gif", "wiki", "vid", "bing", "pic",
|
||
"bold", "imdb", "coub", "like", "vote"};
|
||
return valid_usernames;
|
||
}
|
||
|
||
vector<Slice> find_mentions(Slice str) {
|
||
auto mentions = match_mentions(str);
|
||
td::remove_if(mentions, [](Slice mention) {
|
||
mention.remove_prefix(1);
|
||
if (mention.size() >= 5) {
|
||
return false;
|
||
}
|
||
return get_valid_short_usernames().count(mention) == 0;
|
||
});
|
||
return mentions;
|
||
}
|
||
|
||
vector<Slice> find_bot_commands(Slice str) {
|
||
return match_bot_commands(str);
|
||
}
|
||
|
||
vector<Slice> find_hashtags(Slice str) {
|
||
return match_hashtags(str);
|
||
}
|
||
|
||
vector<Slice> find_cashtags(Slice str) {
|
||
return match_cashtags(str);
|
||
}
|
||
|
||
vector<Slice> find_bank_card_numbers(Slice str) {
|
||
vector<Slice> result;
|
||
for (auto bank_card : match_bank_card_numbers(str)) {
|
||
if (is_valid_bank_card(bank_card)) {
|
||
result.emplace_back(bank_card);
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
vector<std::pair<Slice, bool>> find_urls(Slice str) {
|
||
vector<std::pair<Slice, bool>> result;
|
||
for (auto url : match_urls(str)) {
|
||
if (is_email_address(url)) {
|
||
result.emplace_back(url, true);
|
||
} else if (begins_with(url, "mailto:") && is_email_address(url.substr(7))) {
|
||
result.emplace_back(url.substr(7), true);
|
||
} else {
|
||
url = fix_url(url);
|
||
if (!url.empty()) {
|
||
result.emplace_back(url, false);
|
||
}
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static int32 text_length(Slice text) {
|
||
return narrow_cast<int32>(utf8_utf16_length(text));
|
||
}
|
||
|
||
static void sort_entities(vector<MessageEntity> &entities) {
|
||
if (std::is_sorted(entities.begin(), entities.end())) {
|
||
return;
|
||
}
|
||
|
||
std::sort(entities.begin(), entities.end());
|
||
}
|
||
|
||
#define check_is_sorted(entities) check_is_sorted_impl(entities, __LINE__)
|
||
static void check_is_sorted_impl(const vector<MessageEntity> &entities, int line) {
|
||
LOG_CHECK(std::is_sorted(entities.begin(), entities.end())) << line << " " << entities;
|
||
}
|
||
|
||
#define check_non_intersecting(entities) check_non_intersecting_impl(entities, __LINE__)
|
||
static void check_non_intersecting_impl(const vector<MessageEntity> &entities, int line) {
|
||
for (size_t i = 0; i + 1 < entities.size(); i++) {
|
||
LOG_CHECK(entities[i].offset + entities[i].length <= entities[i + 1].offset) << line << " " << entities;
|
||
}
|
||
}
|
||
|
||
static constexpr int32 get_entity_type_mask(MessageEntity::Type type) {
|
||
return 1 << static_cast<int32>(type);
|
||
}
|
||
|
||
static constexpr int32 get_splittable_entities_mask() {
|
||
return get_entity_type_mask(MessageEntity::Type::Bold) | get_entity_type_mask(MessageEntity::Type::Italic) |
|
||
get_entity_type_mask(MessageEntity::Type::Underline) |
|
||
get_entity_type_mask(MessageEntity::Type::Strikethrough);
|
||
}
|
||
|
||
static constexpr int32 get_blockquote_entities_mask() {
|
||
return get_entity_type_mask(MessageEntity::Type::BlockQuote);
|
||
}
|
||
|
||
static constexpr int32 get_continuous_entities_mask() {
|
||
return get_entity_type_mask(MessageEntity::Type::Mention) | get_entity_type_mask(MessageEntity::Type::Hashtag) |
|
||
get_entity_type_mask(MessageEntity::Type::BotCommand) | get_entity_type_mask(MessageEntity::Type::Url) |
|
||
get_entity_type_mask(MessageEntity::Type::EmailAddress) | get_entity_type_mask(MessageEntity::Type::TextUrl) |
|
||
get_entity_type_mask(MessageEntity::Type::MentionName) | get_entity_type_mask(MessageEntity::Type::Cashtag) |
|
||
get_entity_type_mask(MessageEntity::Type::PhoneNumber) |
|
||
get_entity_type_mask(MessageEntity::Type::BankCardNumber);
|
||
}
|
||
|
||
static constexpr int32 get_pre_entities_mask() {
|
||
return get_entity_type_mask(MessageEntity::Type::Pre) | get_entity_type_mask(MessageEntity::Type::Code) |
|
||
get_entity_type_mask(MessageEntity::Type::PreCode);
|
||
}
|
||
|
||
static constexpr int32 get_user_entities_mask() {
|
||
return get_splittable_entities_mask() | get_blockquote_entities_mask() |
|
||
get_entity_type_mask(MessageEntity::Type::TextUrl) | get_entity_type_mask(MessageEntity::Type::MentionName) |
|
||
get_pre_entities_mask();
|
||
}
|
||
|
||
static int32 is_splittable_entity(MessageEntity::Type type) {
|
||
return (get_entity_type_mask(type) & get_splittable_entities_mask()) != 0;
|
||
}
|
||
|
||
static int32 is_blockquote_entity(MessageEntity::Type type) {
|
||
return type == MessageEntity::Type::BlockQuote;
|
||
}
|
||
|
||
static int32 is_continuous_entity(MessageEntity::Type type) {
|
||
return (get_entity_type_mask(type) & get_continuous_entities_mask()) != 0;
|
||
}
|
||
|
||
static int32 is_pre_entity(MessageEntity::Type type) {
|
||
return (get_entity_type_mask(type) & get_pre_entities_mask()) != 0;
|
||
}
|
||
|
||
static int32 is_user_entity(MessageEntity::Type type) {
|
||
return (get_entity_type_mask(type) & get_user_entities_mask()) != 0;
|
||
}
|
||
|
||
static constexpr size_t SPLITTABLE_ENTITY_TYPE_COUNT = 4;
|
||
|
||
static size_t get_splittable_entity_type_index(MessageEntity::Type type) {
|
||
if (static_cast<int32>(type) <= static_cast<int32>(MessageEntity::Type::Bold) + 1) {
|
||
// Bold or Italic
|
||
return static_cast<int32>(type) - static_cast<int32>(MessageEntity::Type::Bold);
|
||
} else {
|
||
// Underline or Strikethrough
|
||
return static_cast<int32>(type) - static_cast<int32>(MessageEntity::Type::Underline) + 2;
|
||
}
|
||
}
|
||
|
||
static bool are_entities_valid(const vector<MessageEntity> &entities) {
|
||
if (entities.empty()) {
|
||
return true;
|
||
}
|
||
check_is_sorted(entities);
|
||
|
||
int32 end_pos[SPLITTABLE_ENTITY_TYPE_COUNT];
|
||
std::fill_n(end_pos, SPLITTABLE_ENTITY_TYPE_COUNT, -1);
|
||
vector<const MessageEntity *> nested_entities_stack;
|
||
int32 nested_entity_type_mask = 0;
|
||
for (auto &entity : entities) {
|
||
while (!nested_entities_stack.empty() &&
|
||
entity.offset >= nested_entities_stack.back()->offset + nested_entities_stack.back()->length) {
|
||
// remove non-intersecting entities from the stack
|
||
nested_entity_type_mask -= get_entity_type_mask(nested_entities_stack.back()->type);
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
|
||
if (!nested_entities_stack.empty()) {
|
||
if (entity.offset + entity.length > nested_entities_stack.back()->offset + nested_entities_stack.back()->length) {
|
||
// entity intersects some previous entity
|
||
return false;
|
||
}
|
||
if ((nested_entity_type_mask & get_entity_type_mask(entity.type)) != 0) {
|
||
// entity has the same type as one of the previous nested
|
||
return false;
|
||
}
|
||
auto parent_type = nested_entities_stack.back()->type;
|
||
if (is_pre_entity(parent_type)) {
|
||
// Pre and Code can't contain nested entities
|
||
return false;
|
||
}
|
||
// parents are not pre after this point
|
||
if (is_pre_entity(entity.type) && (nested_entity_type_mask & ~get_blockquote_entities_mask()) != 0) {
|
||
// Pre and Code can't be contained in other entities, except blockquote
|
||
return false;
|
||
}
|
||
if ((is_continuous_entity(entity.type) || is_blockquote_entity(entity.type)) &&
|
||
(nested_entity_type_mask & get_continuous_entities_mask()) != 0) {
|
||
// continuous and blockquote can't be contained in continuous
|
||
return false;
|
||
}
|
||
if ((nested_entity_type_mask & get_splittable_entities_mask()) != 0) {
|
||
// the previous nested entity may be needed to splitted for consistency
|
||
// alternatively, better entity merging needs to be implemented
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (is_splittable_entity(entity.type)) {
|
||
auto index = get_splittable_entity_type_index(entity.type);
|
||
if (end_pos[index] >= entity.offset) {
|
||
// the entities can be merged
|
||
return false;
|
||
}
|
||
end_pos[index] = entity.offset + entity.length;
|
||
}
|
||
nested_entities_stack.push_back(&entity);
|
||
nested_entity_type_mask += get_entity_type_mask(entity.type);
|
||
}
|
||
return true;
|
||
}
|
||
|
||
// removes all intersecting entities, including nested
|
||
static void remove_intersecting_entities(vector<MessageEntity> &entities) {
|
||
check_is_sorted(entities);
|
||
int32 last_entity_end = 0;
|
||
size_t left_entities = 0;
|
||
for (size_t i = 0; i < entities.size(); i++) {
|
||
CHECK(entities[i].length > 0);
|
||
if (entities[i].offset >= last_entity_end) {
|
||
last_entity_end = entities[i].offset + entities[i].length;
|
||
if (i != left_entities) {
|
||
entities[left_entities] = std::move(entities[i]);
|
||
}
|
||
left_entities++;
|
||
}
|
||
}
|
||
entities.erase(entities.begin() + left_entities, entities.end());
|
||
}
|
||
|
||
// continuous_entities and blockquote_entities must be pre-sorted and non-overlapping
|
||
static void remove_entities_intersecting_blockquote(vector<MessageEntity> &entities,
|
||
const vector<MessageEntity> &blockquote_entities) {
|
||
check_non_intersecting(entities);
|
||
check_non_intersecting(blockquote_entities);
|
||
if (blockquote_entities.empty()) {
|
||
// fast path
|
||
return;
|
||
}
|
||
|
||
auto blockquote_it = blockquote_entities.begin();
|
||
size_t left_entities = 0;
|
||
for (size_t i = 0; i < entities.size(); i++) {
|
||
while (blockquote_it != blockquote_entities.end() &&
|
||
(blockquote_it->type != MessageEntity::Type::BlockQuote ||
|
||
blockquote_it->offset + blockquote_it->length <= entities[i].offset)) {
|
||
blockquote_it++;
|
||
}
|
||
if (blockquote_it != blockquote_entities.end() &&
|
||
(blockquote_it->offset + blockquote_it->length < entities[i].offset + entities[i].length ||
|
||
(entities[i].offset < blockquote_it->offset &&
|
||
blockquote_it->offset < entities[i].offset + entities[i].length))) {
|
||
continue;
|
||
}
|
||
if (i != left_entities) {
|
||
entities[left_entities] = std::move(entities[i]);
|
||
}
|
||
left_entities++;
|
||
}
|
||
entities.erase(entities.begin() + left_entities, entities.end());
|
||
}
|
||
|
||
vector<MessageEntity> find_entities(Slice text, bool skip_bot_commands, bool only_urls) {
|
||
vector<MessageEntity> entities;
|
||
|
||
if (!only_urls) {
|
||
auto add_entities = [&entities, &text](MessageEntity::Type type, vector<Slice> (*find_entities_f)(Slice)) mutable {
|
||
auto new_entities = find_entities_f(text);
|
||
for (auto &entity : new_entities) {
|
||
auto offset = narrow_cast<int32>(entity.begin() - text.begin());
|
||
auto length = narrow_cast<int32>(entity.size());
|
||
entities.emplace_back(type, offset, length);
|
||
}
|
||
};
|
||
add_entities(MessageEntity::Type::Mention, find_mentions);
|
||
if (!skip_bot_commands) {
|
||
add_entities(MessageEntity::Type::BotCommand, find_bot_commands);
|
||
}
|
||
add_entities(MessageEntity::Type::Hashtag, find_hashtags);
|
||
add_entities(MessageEntity::Type::Cashtag, find_cashtags);
|
||
// TODO find_phone_numbers
|
||
add_entities(MessageEntity::Type::BankCardNumber, find_bank_card_numbers);
|
||
}
|
||
|
||
auto urls = find_urls(text);
|
||
for (auto &url : urls) {
|
||
auto type = url.second ? MessageEntity::Type::EmailAddress : MessageEntity::Type::Url;
|
||
if (only_urls && type != MessageEntity::Type::Url) {
|
||
continue;
|
||
}
|
||
auto offset = narrow_cast<int32>(url.first.begin() - text.begin());
|
||
auto length = narrow_cast<int32>(url.first.size());
|
||
entities.emplace_back(type, offset, length);
|
||
}
|
||
|
||
if (entities.empty()) {
|
||
return entities;
|
||
}
|
||
|
||
sort_entities(entities);
|
||
|
||
remove_intersecting_entities(entities);
|
||
|
||
// fix offsets to UTF-16 offsets
|
||
const unsigned char *begin = text.ubegin();
|
||
const unsigned char *ptr = begin;
|
||
const unsigned char *end = text.uend();
|
||
|
||
int32 utf16_pos = 0;
|
||
for (auto &entity : entities) {
|
||
int cnt = 2;
|
||
auto entity_begin = entity.offset;
|
||
auto entity_end = entity.offset + entity.length;
|
||
|
||
int32 pos = static_cast<int32>(ptr - begin);
|
||
if (entity_begin == pos) {
|
||
cnt--;
|
||
entity.offset = utf16_pos;
|
||
}
|
||
|
||
while (ptr != end && cnt > 0) {
|
||
unsigned char c = ptr[0];
|
||
utf16_pos += 1 + (c >= 0xf0);
|
||
ptr = next_utf8_unsafe(ptr, nullptr, "find_entities");
|
||
|
||
pos = static_cast<int32>(ptr - begin);
|
||
if (entity_begin == pos) {
|
||
cnt--;
|
||
entity.offset = utf16_pos;
|
||
} else if (entity_end == pos) {
|
||
cnt--;
|
||
entity.length = utf16_pos - entity.offset;
|
||
}
|
||
}
|
||
CHECK(cnt == 0);
|
||
}
|
||
|
||
return entities;
|
||
}
|
||
|
||
static vector<MessageEntity> merge_entities(vector<MessageEntity> old_entities, vector<MessageEntity> new_entities) {
|
||
if (new_entities.empty()) {
|
||
return old_entities;
|
||
}
|
||
if (old_entities.empty()) {
|
||
return new_entities;
|
||
}
|
||
|
||
vector<MessageEntity> result;
|
||
result.reserve(old_entities.size() + new_entities.size());
|
||
|
||
auto new_it = new_entities.begin();
|
||
auto new_end = new_entities.end();
|
||
for (auto &old_entity : old_entities) {
|
||
while (new_it != new_end && new_it->offset + new_it->length <= old_entity.offset) {
|
||
result.push_back(std::move(*new_it));
|
||
new_it++;
|
||
}
|
||
auto old_entity_end = old_entity.offset + old_entity.length;
|
||
result.push_back(std::move(old_entity));
|
||
while (new_it != new_end && new_it->offset < old_entity_end) {
|
||
new_it++;
|
||
}
|
||
}
|
||
while (new_it != new_end) {
|
||
result.push_back(std::move(*new_it));
|
||
new_it++;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
static bool is_plain_domain(Slice url) {
|
||
return url.find('/') >= url.size() && url.find('?') >= url.size() && url.find('#') >= url.size();
|
||
}
|
||
|
||
string get_first_url(Slice text, const vector<MessageEntity> &entities) {
|
||
for (auto &entity : entities) {
|
||
switch (entity.type) {
|
||
case MessageEntity::Type::Mention:
|
||
break;
|
||
case MessageEntity::Type::Hashtag:
|
||
break;
|
||
case MessageEntity::Type::BotCommand:
|
||
break;
|
||
case MessageEntity::Type::Url: {
|
||
Slice url = utf8_utf16_substr(text, entity.offset, entity.length);
|
||
if (begins_with(url, "ton:") || begins_with(url, "tg:") || is_plain_domain(url)) {
|
||
continue;
|
||
}
|
||
return url.str();
|
||
}
|
||
case MessageEntity::Type::EmailAddress:
|
||
break;
|
||
case MessageEntity::Type::Bold:
|
||
break;
|
||
case MessageEntity::Type::Italic:
|
||
break;
|
||
case MessageEntity::Type::Underline:
|
||
break;
|
||
case MessageEntity::Type::Strikethrough:
|
||
break;
|
||
case MessageEntity::Type::BlockQuote:
|
||
break;
|
||
case MessageEntity::Type::Code:
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
break;
|
||
case MessageEntity::Type::PreCode:
|
||
break;
|
||
case MessageEntity::Type::TextUrl:
|
||
if (begins_with(entity.argument, "ton:") || begins_with(entity.argument, "tg:")) {
|
||
continue;
|
||
}
|
||
return entity.argument;
|
||
case MessageEntity::Type::MentionName:
|
||
break;
|
||
case MessageEntity::Type::Cashtag:
|
||
break;
|
||
case MessageEntity::Type::PhoneNumber:
|
||
break;
|
||
case MessageEntity::Type::BankCardNumber:
|
||
break;
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
|
||
return string();
|
||
}
|
||
|
||
static UserId get_link_user_id(Slice url) {
|
||
string lower_cased_url = to_lower(url);
|
||
url = lower_cased_url;
|
||
|
||
Slice link_scheme("tg:");
|
||
if (!begins_with(url, link_scheme)) {
|
||
return UserId();
|
||
}
|
||
url.remove_prefix(link_scheme.size());
|
||
if (begins_with(url, "//")) {
|
||
url.remove_prefix(2);
|
||
}
|
||
|
||
Slice host("user");
|
||
if (!begins_with(url, host)) {
|
||
return UserId();
|
||
}
|
||
url.remove_prefix(host.size());
|
||
if (begins_with(url, "/")) {
|
||
url.remove_prefix(1);
|
||
}
|
||
if (!begins_with(url, "?")) {
|
||
return UserId();
|
||
}
|
||
url.remove_prefix(1);
|
||
url.truncate(url.find('#'));
|
||
|
||
for (auto parameter : full_split(url, '&')) {
|
||
Slice key;
|
||
Slice value;
|
||
std::tie(key, value) = split(parameter, '=');
|
||
if (key == Slice("id")) {
|
||
auto r_user_id = to_integer_safe<int32>(value);
|
||
if (r_user_id.is_error()) {
|
||
return UserId();
|
||
}
|
||
return UserId(r_user_id.ok());
|
||
}
|
||
}
|
||
return UserId();
|
||
}
|
||
|
||
Result<vector<MessageEntity>> parse_markdown(string &text) {
|
||
string result;
|
||
vector<MessageEntity> entities;
|
||
size_t size = text.size();
|
||
int32 utf16_offset = 0;
|
||
for (size_t i = 0; i < size; i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (c == '\\' && (text[i + 1] == '_' || text[i + 1] == '*' || text[i + 1] == '`' || text[i + 1] == '[')) {
|
||
i++;
|
||
result.push_back(text[i]);
|
||
utf16_offset++;
|
||
continue;
|
||
}
|
||
if (c != '_' && c != '*' && c != '`' && c != '[') {
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
result.push_back(text[i]);
|
||
continue;
|
||
}
|
||
|
||
// we are at begin of the entity
|
||
size_t begin_pos = i;
|
||
char end_character = text[i];
|
||
bool is_pre = false;
|
||
if (c == '[') {
|
||
end_character = ']';
|
||
}
|
||
|
||
i++;
|
||
|
||
string language;
|
||
if (c == '`' && text[i] == '`' && text[i + 1] == '`') {
|
||
i += 2;
|
||
is_pre = true;
|
||
size_t language_end = i;
|
||
while (!is_space(text[language_end]) && text[language_end] != '`') {
|
||
language_end++;
|
||
}
|
||
if (i != language_end && language_end < size && text[language_end] != '`') {
|
||
language.assign(text, i, language_end - i);
|
||
i = language_end;
|
||
}
|
||
// skip one new line in the beginning of the text
|
||
if (text[i] == '\n' || text[i] == '\r') {
|
||
if ((text[i + 1] == '\n' || text[i + 1] == '\r') && text[i] != text[i + 1]) {
|
||
i += 2;
|
||
} else {
|
||
i++;
|
||
}
|
||
}
|
||
}
|
||
|
||
int32 entity_offset = utf16_offset;
|
||
while (i < size && (text[i] != end_character || (is_pre && !(text[i + 1] == '`' && text[i + 2] == '`')))) {
|
||
auto cur_ch = static_cast<unsigned char>(text[i]);
|
||
if (is_utf8_character_first_code_unit(cur_ch)) {
|
||
utf16_offset += 1 + (cur_ch >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
result.push_back(text[i++]);
|
||
}
|
||
if (i == size) {
|
||
return Status::Error(400, PSLICE() << "Can't find end of the entity starting at byte offset " << begin_pos);
|
||
}
|
||
|
||
if (entity_offset != utf16_offset) {
|
||
auto entity_length = utf16_offset - entity_offset;
|
||
switch (c) {
|
||
case '_':
|
||
entities.emplace_back(MessageEntity::Type::Italic, entity_offset, entity_length);
|
||
break;
|
||
case '*':
|
||
entities.emplace_back(MessageEntity::Type::Bold, entity_offset, entity_length);
|
||
break;
|
||
case '[': {
|
||
string url;
|
||
if (text[i + 1] != '(') {
|
||
// use text as a url
|
||
url.assign(text, begin_pos + 1, i - begin_pos - 1);
|
||
} else {
|
||
i += 2;
|
||
while (i < size && text[i] != ')') {
|
||
url.push_back(text[i++]);
|
||
}
|
||
}
|
||
auto user_id = get_link_user_id(url);
|
||
if (user_id.is_valid()) {
|
||
entities.emplace_back(entity_offset, entity_length, user_id);
|
||
} else {
|
||
auto r_url = check_url(url);
|
||
if (r_url.is_ok()) {
|
||
entities.emplace_back(MessageEntity::Type::TextUrl, entity_offset, entity_length, r_url.move_as_ok());
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case '`':
|
||
if (is_pre) {
|
||
if (language.empty()) {
|
||
entities.emplace_back(MessageEntity::Type::Pre, entity_offset, entity_length);
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::PreCode, entity_offset, entity_length, language);
|
||
}
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::Code, entity_offset, entity_length);
|
||
}
|
||
break;
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
if (is_pre) {
|
||
i += 2;
|
||
}
|
||
}
|
||
text = result;
|
||
return entities;
|
||
}
|
||
|
||
static Result<vector<MessageEntity>> do_parse_markdown_v2(CSlice text, string &result) {
|
||
vector<MessageEntity> entities;
|
||
int32 utf16_offset = 0;
|
||
|
||
struct EntityInfo {
|
||
MessageEntity::Type type;
|
||
string argument;
|
||
int32 entity_offset;
|
||
size_t entity_byte_offset;
|
||
size_t entity_begin_pos;
|
||
|
||
EntityInfo(MessageEntity::Type type, string argument, int32 entity_offset, size_t entity_byte_offset,
|
||
size_t entity_begin_pos)
|
||
: type(type)
|
||
, argument(std::move(argument))
|
||
, entity_offset(entity_offset)
|
||
, entity_byte_offset(entity_byte_offset)
|
||
, entity_begin_pos(entity_begin_pos) {
|
||
}
|
||
};
|
||
std::vector<EntityInfo> nested_entities;
|
||
|
||
for (size_t i = 0; i < text.size(); i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (c == '\\' && text[i + 1] > 0 && text[i + 1] <= 126) {
|
||
i++;
|
||
utf16_offset += 1;
|
||
result += text[i];
|
||
continue;
|
||
}
|
||
|
||
Slice reserved_characters("_*[]()~`>#+-=|{}.!");
|
||
if (!nested_entities.empty()) {
|
||
switch (nested_entities.back().type) {
|
||
case MessageEntity::Type::Code:
|
||
case MessageEntity::Type::Pre:
|
||
case MessageEntity::Type::PreCode:
|
||
reserved_characters = Slice("`");
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (reserved_characters.find(text[i]) == Slice::npos) {
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
result.push_back(text[i]);
|
||
continue;
|
||
}
|
||
|
||
bool is_end_of_an_entity = false;
|
||
if (!nested_entities.empty()) {
|
||
is_end_of_an_entity = [&] {
|
||
switch (nested_entities.back().type) {
|
||
case MessageEntity::Type::Bold:
|
||
return c == '*';
|
||
case MessageEntity::Type::Italic:
|
||
return c == '_' && text[i + 1] != '_';
|
||
case MessageEntity::Type::Code:
|
||
return c == '`';
|
||
case MessageEntity::Type::Pre:
|
||
case MessageEntity::Type::PreCode:
|
||
return c == '`' && text[i + 1] == '`' && text[i + 2] == '`';
|
||
case MessageEntity::Type::TextUrl:
|
||
return c == ']';
|
||
case MessageEntity::Type::Underline:
|
||
return c == '_' && text[i + 1] == '_';
|
||
case MessageEntity::Type::Strikethrough:
|
||
return c == '~';
|
||
default:
|
||
UNREACHABLE();
|
||
return false;
|
||
}
|
||
}();
|
||
}
|
||
|
||
if (!is_end_of_an_entity) {
|
||
// begin of an entity
|
||
MessageEntity::Type type;
|
||
string argument;
|
||
auto entity_byte_offset = i;
|
||
switch (c) {
|
||
case '_':
|
||
if (text[i + 1] == '_') {
|
||
type = MessageEntity::Type::Underline;
|
||
i++;
|
||
} else {
|
||
type = MessageEntity::Type::Italic;
|
||
}
|
||
break;
|
||
case '*':
|
||
type = MessageEntity::Type::Bold;
|
||
break;
|
||
case '~':
|
||
type = MessageEntity::Type::Strikethrough;
|
||
break;
|
||
case '[':
|
||
type = MessageEntity::Type::TextUrl;
|
||
break;
|
||
case '`':
|
||
if (text[i + 1] == '`' && text[i + 2] == '`') {
|
||
i += 3;
|
||
type = MessageEntity::Type::Pre;
|
||
size_t language_end = i;
|
||
while (!is_space(text[language_end]) && text[language_end] != '`') {
|
||
language_end++;
|
||
}
|
||
if (i != language_end && language_end < text.size() && text[language_end] != '`') {
|
||
type = MessageEntity::Type::PreCode;
|
||
argument = text.substr(i, language_end - i).str();
|
||
i = language_end;
|
||
}
|
||
// skip one new line in the beginning of the text
|
||
if (text[i] == '\n' || text[i] == '\r') {
|
||
if ((text[i + 1] == '\n' || text[i + 1] == '\r') && text[i] != text[i + 1]) {
|
||
i += 2;
|
||
} else {
|
||
i++;
|
||
}
|
||
}
|
||
|
||
i--;
|
||
} else {
|
||
type = MessageEntity::Type::Code;
|
||
}
|
||
break;
|
||
default:
|
||
return Status::Error(
|
||
400, PSLICE() << "Character '" << text[i] << "' is reserved and must be escaped with the preceding '\\'");
|
||
}
|
||
nested_entities.emplace_back(type, std::move(argument), utf16_offset, entity_byte_offset, result.size());
|
||
} else {
|
||
// end of an entity
|
||
auto type = nested_entities.back().type;
|
||
auto argument = std::move(nested_entities.back().argument);
|
||
UserId user_id;
|
||
bool skip_entity = utf16_offset == nested_entities.back().entity_offset;
|
||
switch (type) {
|
||
case MessageEntity::Type::Bold:
|
||
case MessageEntity::Type::Italic:
|
||
case MessageEntity::Type::Code:
|
||
case MessageEntity::Type::Strikethrough:
|
||
break;
|
||
case MessageEntity::Type::Underline:
|
||
i++;
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
case MessageEntity::Type::PreCode:
|
||
i += 2;
|
||
break;
|
||
case MessageEntity::Type::TextUrl: {
|
||
string url;
|
||
if (text[i + 1] != '(') {
|
||
// use text as a url
|
||
url = result.substr(nested_entities.back().entity_begin_pos);
|
||
} else {
|
||
i += 2;
|
||
auto url_begin_pos = i;
|
||
while (i < text.size() && text[i] != ')') {
|
||
if (text[i] == '\\' && text[i + 1] > 0 && text[i + 1] <= 126) {
|
||
url += text[i + 1];
|
||
i += 2;
|
||
continue;
|
||
}
|
||
url += text[i++];
|
||
}
|
||
if (text[i] != ')') {
|
||
return Status::Error(400, PSLICE() << "Can't find end of a URL at byte offset " << url_begin_pos);
|
||
}
|
||
}
|
||
user_id = get_link_user_id(url);
|
||
if (!user_id.is_valid()) {
|
||
auto r_url = check_url(url);
|
||
if (r_url.is_error()) {
|
||
skip_entity = true;
|
||
} else {
|
||
argument = r_url.move_as_ok();
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
UNREACHABLE();
|
||
return false;
|
||
}
|
||
|
||
if (!skip_entity) {
|
||
auto entity_offset = nested_entities.back().entity_offset;
|
||
auto entity_length = utf16_offset - entity_offset;
|
||
if (user_id.is_valid()) {
|
||
entities.emplace_back(entity_offset, entity_length, user_id);
|
||
} else {
|
||
entities.emplace_back(type, entity_offset, entity_length, std::move(argument));
|
||
}
|
||
}
|
||
nested_entities.pop_back();
|
||
}
|
||
}
|
||
if (!nested_entities.empty()) {
|
||
return Status::Error(400, PSLICE() << "Can't find end of " << nested_entities.back().type
|
||
<< " entity at byte offset " << nested_entities.back().entity_byte_offset);
|
||
}
|
||
|
||
sort_entities(entities);
|
||
|
||
return entities;
|
||
}
|
||
|
||
Result<vector<MessageEntity>> parse_markdown_v2(string &text) {
|
||
string result;
|
||
TRY_RESULT(entities, do_parse_markdown_v2(text, result));
|
||
text = result;
|
||
return entities;
|
||
}
|
||
|
||
static vector<Slice> find_text_url_entities_v3(Slice text) {
|
||
vector<Slice> result;
|
||
size_t size = text.size();
|
||
for (size_t i = 0; i < size; i++) {
|
||
if (text[i] != '[') {
|
||
continue;
|
||
}
|
||
|
||
auto text_begin = i;
|
||
auto text_end = text_begin + 1;
|
||
while (text_end < size && text[text_end] != ']') {
|
||
text_end++;
|
||
}
|
||
|
||
i = text_end; // prevent quadratic asymptotic
|
||
|
||
if (text_end == size || text_end == text_begin + 1) {
|
||
continue;
|
||
}
|
||
|
||
auto url_begin = text_end + 1;
|
||
if (url_begin == size || text[url_begin] != '(') {
|
||
continue;
|
||
}
|
||
|
||
size_t url_end = url_begin + 1;
|
||
while (url_end < size && text[url_end] != ')') {
|
||
url_end++;
|
||
}
|
||
|
||
i = url_end; // prevent quadratic asymptotic, disallows [a](b[c](t.me)
|
||
|
||
if (url_end < size) {
|
||
Slice url = text.substr(url_begin + 1, url_end - url_begin - 1);
|
||
if (check_url(url).is_ok()) {
|
||
result.push_back(text.substr(text_begin, text_end - text_begin + 1));
|
||
result.push_back(text.substr(url_begin, url_end - url_begin + 1));
|
||
}
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// entities must be valid for the text
|
||
static FormattedText parse_text_url_entities_v3(Slice text, const vector<MessageEntity> &entities) {
|
||
// continuous entities can't intersect TextUrl entities,
|
||
// so try to find new TextUrl entities only between the predetermined continuous entities
|
||
|
||
Slice debug_initial_text = text;
|
||
|
||
FormattedText result;
|
||
int32 result_text_utf16_length = 0;
|
||
vector<MessageEntity> part_entities;
|
||
vector<MessageEntity> part_splittable_entities[SPLITTABLE_ENTITY_TYPE_COUNT];
|
||
int32 part_begin = 0;
|
||
int32 max_end = 0;
|
||
int32 skipped_length = 0;
|
||
auto add_part = [&](int32 part_end) {
|
||
// we have [part_begin, max_end) kept part and [max_end, part_end) part to parse text_url entities
|
||
|
||
if (max_end != part_begin) {
|
||
// add all entities from the kept part
|
||
auto kept_part_text = utf8_utf16_substr(text, 0, max_end - part_begin);
|
||
text = text.substr(kept_part_text.size());
|
||
|
||
result.text.append(kept_part_text.begin(), kept_part_text.size());
|
||
append(result.entities, std::move(part_entities));
|
||
part_entities.clear();
|
||
result_text_utf16_length += max_end - part_begin;
|
||
}
|
||
|
||
size_t splittable_entity_pos[SPLITTABLE_ENTITY_TYPE_COUNT] = {};
|
||
for (size_t index = 0; index < SPLITTABLE_ENTITY_TYPE_COUNT; index++) {
|
||
check_non_intersecting(part_splittable_entities[index]);
|
||
}
|
||
if (part_end != max_end) {
|
||
// try to find text_url entities in the left part
|
||
auto parsed_part_text = utf8_utf16_substr(text, 0, part_end - max_end);
|
||
text = text.substr(parsed_part_text.size());
|
||
|
||
vector<Slice> text_urls = find_text_url_entities_v3(parsed_part_text);
|
||
|
||
int32 text_utf16_offset = max_end;
|
||
size_t prev_pos = 0;
|
||
for (size_t i = 0; i < text_urls.size(); i += 2) {
|
||
auto text_begin_pos = static_cast<size_t>(text_urls[i].begin() - parsed_part_text.begin());
|
||
auto text_end_pos = text_begin_pos + text_urls[i].size() - 1;
|
||
auto url_begin_pos = static_cast<size_t>(text_urls[i + 1].begin() - parsed_part_text.begin());
|
||
auto url_end_pos = url_begin_pos + text_urls[i + 1].size() - 1;
|
||
CHECK(parsed_part_text[text_begin_pos] == '[');
|
||
CHECK(parsed_part_text[text_end_pos] == ']');
|
||
CHECK(url_begin_pos == text_end_pos + 1);
|
||
CHECK(parsed_part_text[url_begin_pos] == '(');
|
||
CHECK(parsed_part_text[url_end_pos] == ')');
|
||
|
||
Slice before_text_url = parsed_part_text.substr(prev_pos, text_begin_pos - prev_pos);
|
||
auto before_text_url_utf16_length = text_length(before_text_url);
|
||
result_text_utf16_length += before_text_url_utf16_length;
|
||
result.text.append(before_text_url.begin(), before_text_url.size());
|
||
text_utf16_offset += before_text_url_utf16_length;
|
||
|
||
Slice text_url = parsed_part_text.substr(text_begin_pos + 1, text_end_pos - text_begin_pos - 1);
|
||
auto text_url_utf16_length = text_length(text_url);
|
||
Slice url = parsed_part_text.substr(url_begin_pos + 1, url_end_pos - url_begin_pos - 1);
|
||
auto url_utf16_length = text_length(url);
|
||
result.entities.emplace_back(MessageEntity::Type::TextUrl, result_text_utf16_length, text_url_utf16_length,
|
||
check_url(url).move_as_ok());
|
||
result.text.append(text_url.begin(), text_url.size());
|
||
result_text_utf16_length += text_url_utf16_length;
|
||
|
||
auto initial_utf16_length = 1 + text_url_utf16_length + 1 + 1 + url_utf16_length + 1;
|
||
|
||
// adjust splittable entities, removing deleted parts from them
|
||
// in the segment [text_utf16_offset, text_utf16_offset + initial_utf16_length)
|
||
// the first character and the last (url_utf16_length + 3) characters are deleted
|
||
for (size_t index = 0; index < SPLITTABLE_ENTITY_TYPE_COUNT; index++) {
|
||
auto &pos = splittable_entity_pos[index];
|
||
auto &splittable_entities = part_splittable_entities[index];
|
||
while (pos < splittable_entities.size() &&
|
||
splittable_entities[pos].offset < text_utf16_offset + initial_utf16_length) {
|
||
auto offset = splittable_entities[pos].offset;
|
||
auto length = splittable_entities[pos].length;
|
||
if (offset + length > text_utf16_offset + 1 + text_url_utf16_length) {
|
||
// ends after last removed part; truncate length
|
||
length = text_utf16_offset + 1 + text_url_utf16_length - offset;
|
||
}
|
||
if (offset >= text_utf16_offset + 1) {
|
||
offset--;
|
||
} else if (offset + length >= text_utf16_offset + 1) {
|
||
length--;
|
||
}
|
||
if (length > 0) {
|
||
CHECK(offset >= skipped_length);
|
||
CHECK(offset - skipped_length + length <= result_text_utf16_length);
|
||
if (offset < text_utf16_offset && offset + length > text_utf16_offset) {
|
||
// entity intersects start on the new text_url entity; split it
|
||
result.entities.emplace_back(splittable_entities[pos].type, offset - skipped_length,
|
||
text_utf16_offset - offset);
|
||
length -= text_utf16_offset - offset;
|
||
offset = text_utf16_offset;
|
||
}
|
||
result.entities.emplace_back(splittable_entities[pos].type, offset - skipped_length, length);
|
||
}
|
||
if (splittable_entities[pos].offset + splittable_entities[pos].length >
|
||
text_utf16_offset + initial_utf16_length) {
|
||
// begins before end of the segment, but ends after it
|
||
// need to keep the entity for future segments, so split the entity
|
||
splittable_entities[pos].length = splittable_entities[pos].offset + splittable_entities[pos].length -
|
||
(text_utf16_offset + initial_utf16_length);
|
||
splittable_entities[pos].offset = text_utf16_offset + initial_utf16_length;
|
||
} else {
|
||
pos++;
|
||
}
|
||
}
|
||
}
|
||
text_utf16_offset += initial_utf16_length;
|
||
|
||
skipped_length += 2 + 2 + url_utf16_length;
|
||
prev_pos = url_end_pos + 1;
|
||
}
|
||
|
||
result.text.append(parsed_part_text.begin() + prev_pos, parsed_part_text.size() - prev_pos);
|
||
result_text_utf16_length += part_end - text_utf16_offset;
|
||
}
|
||
|
||
// now add all left splittable entities from [part_begin, part_end)
|
||
for (size_t index = 0; index < SPLITTABLE_ENTITY_TYPE_COUNT; index++) {
|
||
auto &pos = splittable_entity_pos[index];
|
||
auto &splittable_entities = part_splittable_entities[index];
|
||
while (pos < splittable_entities.size() && splittable_entities[pos].offset < part_end) {
|
||
if (splittable_entities[pos].offset + splittable_entities[pos].length > part_end) {
|
||
// begins before end of the segment, but ends after it
|
||
// need to keep the entity for future segments, so split the entity
|
||
// entities don't intersect each other, so there can be at most one such entity
|
||
result.entities.emplace_back(splittable_entities[pos].type, splittable_entities[pos].offset - skipped_length,
|
||
part_end - splittable_entities[pos].offset);
|
||
|
||
splittable_entities[pos].length =
|
||
splittable_entities[pos].offset + splittable_entities[pos].length - part_end;
|
||
splittable_entities[pos].offset = part_end;
|
||
} else {
|
||
result.entities.emplace_back(splittable_entities[pos].type, splittable_entities[pos].offset - skipped_length,
|
||
splittable_entities[pos].length);
|
||
pos++;
|
||
}
|
||
}
|
||
if (pos == splittable_entities.size()) {
|
||
splittable_entities.clear();
|
||
} else {
|
||
CHECK(pos == splittable_entities.size() - 1);
|
||
LOG_CHECK(!text.empty()) << '"' << debug_initial_text << "\" " << entities;
|
||
splittable_entities[0] = std::move(splittable_entities.back());
|
||
splittable_entities.resize(1);
|
||
}
|
||
}
|
||
|
||
part_begin = part_end;
|
||
};
|
||
|
||
for (const auto &entity : entities) {
|
||
if (is_splittable_entity(entity.type)) {
|
||
auto index = get_splittable_entity_type_index(entity.type);
|
||
part_splittable_entities[index].push_back(entity);
|
||
continue;
|
||
}
|
||
CHECK(is_continuous_entity(entity.type));
|
||
|
||
if (entity.offset > max_end) {
|
||
// found a gap from max_end to entity.offset between predetermined entities
|
||
add_part(entity.offset);
|
||
} else {
|
||
CHECK(entity.offset == max_end);
|
||
}
|
||
|
||
max_end = entity.offset + entity.length;
|
||
part_entities.push_back(entity);
|
||
part_entities.back().offset -= skipped_length;
|
||
}
|
||
add_part(part_begin + text_length(text));
|
||
|
||
return result;
|
||
}
|
||
|
||
static vector<MessageEntity> find_splittable_entities_v3(Slice text, const vector<MessageEntity> &entities) {
|
||
std::unordered_set<size_t> unallowed_boundaries;
|
||
for (auto &entity : entities) {
|
||
unallowed_boundaries.insert(entity.offset);
|
||
unallowed_boundaries.insert(entity.offset + entity.length);
|
||
if (entity.type == MessageEntity::Type::Mention || entity.type == MessageEntity::Type::Hashtag ||
|
||
entity.type == MessageEntity::Type::BotCommand || entity.type == MessageEntity::Type::Cashtag ||
|
||
entity.type == MessageEntity::Type::PhoneNumber || entity.type == MessageEntity::Type::BankCardNumber) {
|
||
for (int32 i = 1; i < entity.length; i++) {
|
||
unallowed_boundaries.insert(entity.offset + i);
|
||
}
|
||
}
|
||
}
|
||
|
||
auto found_entities = find_entities(text, false, false);
|
||
td::remove_if(found_entities, [](const auto &entity) {
|
||
return entity.type == MessageEntity::Type::EmailAddress || entity.type == MessageEntity::Type::Url;
|
||
});
|
||
for (auto &entity : found_entities) {
|
||
for (int32 i = 0; i <= entity.length; i++) {
|
||
unallowed_boundaries.insert(entity.offset + i);
|
||
}
|
||
}
|
||
|
||
vector<MessageEntity> result;
|
||
int32 splittable_entity_offset[SPLITTABLE_ENTITY_TYPE_COUNT] = {};
|
||
int32 utf16_offset = 0;
|
||
for (size_t i = 0; i + 1 < text.size(); i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
if ((c == '_' || c == '*' || c == '~') && text[i] == text[i + 1] && unallowed_boundaries.count(utf16_offset) == 0) {
|
||
auto j = i + 2;
|
||
while (j != text.size() && text[j] == text[i] && unallowed_boundaries.count(utf16_offset + j - i - 1) == 0) {
|
||
j++;
|
||
}
|
||
if (j == i + 2) {
|
||
auto type = c == '_' ? MessageEntity::Type::Italic
|
||
: (c == '*' ? MessageEntity::Type::Bold : MessageEntity::Type::Strikethrough);
|
||
auto index = get_splittable_entity_type_index(type);
|
||
if (splittable_entity_offset[index] != 0) {
|
||
auto length = utf16_offset - splittable_entity_offset[index] - 1;
|
||
if (length > 0) {
|
||
result.emplace_back(type, splittable_entity_offset[index], length);
|
||
}
|
||
splittable_entity_offset[index] = 0;
|
||
} else {
|
||
splittable_entity_offset[index] = utf16_offset + 1;
|
||
}
|
||
}
|
||
utf16_offset += narrow_cast<int32>(j - i - 1);
|
||
i = j - 1;
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// entities must be valid and can contain only splittable and continuous entities
|
||
// __italic__ ~~strikethrough~~ **bold** and [text_url](telegram.org) entities are left to be parsed
|
||
static FormattedText parse_markdown_v3_without_pre(Slice text, vector<MessageEntity> entities) {
|
||
check_is_sorted(entities);
|
||
|
||
FormattedText parsed_text_url_text;
|
||
if (text.find('[') != string::npos) {
|
||
parsed_text_url_text = parse_text_url_entities_v3(text, entities);
|
||
text = parsed_text_url_text.text;
|
||
entities = std::move(parsed_text_url_text.entities);
|
||
}
|
||
// splittable entities are sorted only within a fixed type now
|
||
|
||
bool have_splittable_entities = false;
|
||
for (size_t i = 0; i + 1 < text.size(); i++) {
|
||
if ((text[i] == '_' || text[i] == '*' || text[i] == '~') && text[i] == text[i + 1]) {
|
||
have_splittable_entities = true;
|
||
break;
|
||
}
|
||
}
|
||
if (!have_splittable_entities) {
|
||
// fast path
|
||
sort_entities(entities);
|
||
return {text.str(), std::move(entities)};
|
||
}
|
||
|
||
auto found_splittable_entities = find_splittable_entities_v3(text, entities);
|
||
vector<int32> removed_pos;
|
||
for (auto &entity : found_splittable_entities) {
|
||
removed_pos.push_back(entity.offset - 1);
|
||
removed_pos.push_back(entity.offset + entity.length + 1);
|
||
}
|
||
std::sort(removed_pos.begin(), removed_pos.end());
|
||
|
||
string new_text;
|
||
CHECK(text.size() >= 2 * removed_pos.size());
|
||
new_text.reserve(text.size() - 2 * removed_pos.size());
|
||
size_t j = 0;
|
||
int32 utf16_offset = 0;
|
||
for (size_t i = 0; i < text.size(); i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
if (j < removed_pos.size() && utf16_offset == removed_pos[j]) {
|
||
i++;
|
||
utf16_offset++;
|
||
CHECK(j + 1 == removed_pos.size() || removed_pos[j + 1] >= removed_pos[j] + 2);
|
||
j++;
|
||
} else {
|
||
new_text += text[i];
|
||
}
|
||
}
|
||
CHECK(j == removed_pos.size());
|
||
combine(entities, std::move(found_splittable_entities));
|
||
for (auto &entity : entities) {
|
||
auto removed_before_begin = narrow_cast<int32>(
|
||
std::upper_bound(removed_pos.begin(), removed_pos.end(), entity.offset) - removed_pos.begin());
|
||
auto removed_before_end = narrow_cast<int32>(
|
||
std::upper_bound(removed_pos.begin(), removed_pos.end(), entity.offset + entity.length) - removed_pos.begin());
|
||
entity.length -= 2 * (removed_before_end - removed_before_begin);
|
||
entity.offset -= 2 * removed_before_begin;
|
||
CHECK(entity.offset >= 0);
|
||
CHECK(entity.length >= 0);
|
||
CHECK(entity.offset + entity.length <= utf16_offset);
|
||
}
|
||
|
||
td::remove_if(entities, [](const auto &entity) { return entity.length == 0; });
|
||
|
||
sort_entities(entities);
|
||
return {std::move(new_text), std::move(entities)};
|
||
}
|
||
|
||
static FormattedText parse_pre_entities_v3(Slice text) {
|
||
string result;
|
||
vector<MessageEntity> entities;
|
||
size_t size = text.size();
|
||
int32 utf16_offset = 0;
|
||
for (size_t i = 0; i < size; i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (c != '`') {
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
result.push_back(text[i]);
|
||
continue;
|
||
}
|
||
|
||
size_t j = i + 1;
|
||
while (j < size && text[j] == '`') {
|
||
j++;
|
||
}
|
||
|
||
if (j - i == 1 || j - i == 3) {
|
||
// trying to find end of the entity
|
||
int32 entity_length = 0;
|
||
bool is_found = false;
|
||
for (size_t end_tag_begin = j; end_tag_begin < size; end_tag_begin++) {
|
||
auto cur_c = static_cast<unsigned char>(text[end_tag_begin]);
|
||
if (cur_c == '`') {
|
||
// possible end tag
|
||
size_t end_tag_end = end_tag_begin + 1;
|
||
while (end_tag_end < size && text[end_tag_end] == '`') {
|
||
end_tag_end++;
|
||
}
|
||
if (end_tag_end - end_tag_begin == j - i) {
|
||
// end tag found
|
||
CHECK(entity_length > 0);
|
||
entities.emplace_back(j - i == 3 ? MessageEntity::Type::Pre : MessageEntity::Type::Code, utf16_offset,
|
||
entity_length);
|
||
result.append(text.begin() + j, end_tag_begin - j);
|
||
utf16_offset += entity_length;
|
||
i = end_tag_end - 1;
|
||
is_found = true;
|
||
break;
|
||
} else {
|
||
// not an end tag, skip
|
||
entity_length += narrow_cast<int32>(end_tag_end - end_tag_begin);
|
||
end_tag_begin = end_tag_end - 1;
|
||
}
|
||
} else if (is_utf8_character_first_code_unit(cur_c)) {
|
||
entity_length += 1 + (cur_c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
}
|
||
if (is_found) {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
result.append(text.begin() + i, j - i);
|
||
utf16_offset += narrow_cast<int32>(j - i);
|
||
i = j - 1;
|
||
}
|
||
return {std::move(result), std::move(entities)};
|
||
}
|
||
|
||
// entities must be valid for the text
|
||
static FormattedText parse_pre_entities_v3(Slice text, vector<MessageEntity> entities) {
|
||
// nothing can intersect pre entities, so ignore all '`' inside the predetermined entities
|
||
// and try to find new pre entities only between the predetermined entities
|
||
|
||
FormattedText result;
|
||
int32 result_text_utf16_length = 0;
|
||
int32 part_begin = 0;
|
||
int32 max_end = 0;
|
||
int32 skipped_length = 0;
|
||
|
||
auto add_part = [&](int32 part_end) {
|
||
// we have [part_begin, max_end) kept part and [max_end, part_end) part to parse pre entities
|
||
CHECK(part_begin == result_text_utf16_length + skipped_length);
|
||
|
||
if (max_end != part_begin) {
|
||
// add the kept part
|
||
auto kept_part_text = utf8_utf16_substr(text, 0, max_end - part_begin);
|
||
text = text.substr(kept_part_text.size());
|
||
|
||
result.text.append(kept_part_text.begin(), kept_part_text.size());
|
||
result_text_utf16_length += max_end - part_begin;
|
||
}
|
||
|
||
if (part_end != max_end) {
|
||
// try to find pre entities in the left part
|
||
auto parsed_part_text = utf8_utf16_substr(text, 0, part_end - max_end);
|
||
text = text.substr(parsed_part_text.size());
|
||
|
||
if (parsed_part_text.find('`') == string::npos) {
|
||
// fast path, no pre entities; just append the text
|
||
result.text.append(parsed_part_text.begin(), parsed_part_text.size());
|
||
result_text_utf16_length += part_end - max_end;
|
||
} else {
|
||
FormattedText parsed_text = parse_pre_entities_v3(parsed_part_text);
|
||
int32 new_skipped_length = 0;
|
||
for (auto &entity : parsed_text.entities) {
|
||
new_skipped_length += (entity.type == MessageEntity::Type::Pre ? 6 : 2);
|
||
}
|
||
CHECK(new_skipped_length < part_end - max_end);
|
||
result.text += parsed_text.text;
|
||
for (auto &entity : parsed_text.entities) {
|
||
entity.offset += result_text_utf16_length;
|
||
}
|
||
append(result.entities, std::move(parsed_text.entities));
|
||
result_text_utf16_length += part_end - max_end - new_skipped_length;
|
||
skipped_length += new_skipped_length;
|
||
}
|
||
}
|
||
|
||
part_begin = part_end;
|
||
};
|
||
|
||
for (auto &entity : entities) {
|
||
if (entity.offset > max_end) {
|
||
// found a gap from max_end to entity.offset between predetermined entities
|
||
add_part(entity.offset);
|
||
}
|
||
|
||
max_end = td::max(max_end, entity.offset + entity.length);
|
||
result.entities.push_back(std::move(entity));
|
||
result.entities.back().offset -= skipped_length;
|
||
}
|
||
add_part(part_begin + text_length(text));
|
||
|
||
return result;
|
||
}
|
||
|
||
// text entities must be valid
|
||
// returned entities must be resplitted and fixed
|
||
FormattedText parse_markdown_v3(FormattedText text) {
|
||
if (text.text.find('`') != string::npos) {
|
||
text = parse_pre_entities_v3(text.text, std::move(text.entities));
|
||
check_is_sorted(text.entities);
|
||
}
|
||
|
||
bool have_pre = false;
|
||
for (auto &entity : text.entities) {
|
||
if (is_pre_entity(entity.type)) {
|
||
have_pre = true;
|
||
break;
|
||
}
|
||
}
|
||
if (!have_pre) {
|
||
// fast path
|
||
return parse_markdown_v3_without_pre(text.text, std::move(text.entities));
|
||
}
|
||
|
||
FormattedText result;
|
||
int32 result_text_utf16_length = 0;
|
||
vector<MessageEntity> part_entities;
|
||
int32 part_begin = 0;
|
||
int32 max_end = 0;
|
||
Slice left_text = text.text;
|
||
|
||
auto add_part = [&](int32 part_end) {
|
||
auto part_text = utf8_utf16_substr(left_text, 0, part_end - part_begin);
|
||
left_text = left_text.substr(part_text.size());
|
||
|
||
FormattedText part = parse_markdown_v3_without_pre(part_text, std::move(part_entities));
|
||
part_entities.clear();
|
||
|
||
result.text += part.text;
|
||
for (auto &entity : part.entities) {
|
||
entity.offset += result_text_utf16_length;
|
||
}
|
||
append(result.entities, std::move(part.entities));
|
||
result_text_utf16_length += text_length(part.text);
|
||
part_begin = part_end;
|
||
};
|
||
|
||
for (size_t i = 0; i < text.entities.size(); i++) {
|
||
auto &entity = text.entities[i];
|
||
CHECK(is_splittable_entity(entity.type) || is_pre_entity(entity.type) || is_continuous_entity(entity.type));
|
||
if (is_pre_entity(entity.type)) {
|
||
CHECK(entity.offset >= max_end);
|
||
CHECK(i + 1 == text.entities.size() || text.entities[i + 1].offset >= entity.offset + entity.length);
|
||
|
||
add_part(entity.offset);
|
||
|
||
auto part_text = utf8_utf16_substr(left_text, 0, entity.length);
|
||
left_text = left_text.substr(part_text.size());
|
||
|
||
result.text.append(part_text.begin(), part_text.size());
|
||
result.entities.push_back(entity);
|
||
result.entities.back().offset = result_text_utf16_length;
|
||
result_text_utf16_length += entity.length;
|
||
part_begin = entity.offset + entity.length;
|
||
} else {
|
||
part_entities.push_back(entity);
|
||
part_entities.back().offset -= part_begin;
|
||
}
|
||
|
||
max_end = td::max(max_end, entity.offset + entity.length);
|
||
}
|
||
add_part(part_begin + text_length(left_text));
|
||
|
||
return result;
|
||
}
|
||
|
||
// text entities must be valid
|
||
FormattedText get_markdown_v3(FormattedText text) {
|
||
if (text.entities.empty()) {
|
||
return text;
|
||
}
|
||
|
||
check_is_sorted(text.entities);
|
||
for (auto &entity : text.entities) {
|
||
if (!is_user_entity(entity.type)) {
|
||
return text;
|
||
}
|
||
}
|
||
|
||
FormattedText result;
|
||
struct EntityInfo {
|
||
const MessageEntity *entity;
|
||
int32 utf16_added_before;
|
||
|
||
EntityInfo(MessageEntity *entity, int32 utf16_added_before)
|
||
: entity(entity), utf16_added_before(utf16_added_before) {
|
||
}
|
||
};
|
||
vector<EntityInfo> nested_entities_stack;
|
||
size_t current_entity = 0;
|
||
|
||
int32 utf16_offset = 0;
|
||
int32 utf16_added = 0;
|
||
|
||
for (size_t pos = 0; pos <= text.text.size(); pos++) {
|
||
auto c = static_cast<unsigned char>(text.text[pos]);
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
while (!nested_entities_stack.empty()) {
|
||
const auto *entity = nested_entities_stack.back().entity;
|
||
auto entity_end = entity->offset + entity->length;
|
||
if (utf16_offset < entity_end) {
|
||
break;
|
||
}
|
||
|
||
CHECK(utf16_offset == entity_end);
|
||
|
||
switch (entity->type) {
|
||
case MessageEntity::Type::Italic:
|
||
result.text += "__";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::Bold:
|
||
result.text += "**";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::Strikethrough:
|
||
result.text += "~~";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::TextUrl:
|
||
result.text += "](";
|
||
result.text += entity->argument;
|
||
result.text += ')';
|
||
utf16_added += narrow_cast<int32>(3 + entity->argument.size());
|
||
break;
|
||
case MessageEntity::Type::Code:
|
||
result.text += '`';
|
||
utf16_added++;
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
result.text += "```";
|
||
utf16_added += 3;
|
||
break;
|
||
default:
|
||
result.entities.push_back(*entity);
|
||
result.entities.back().offset += nested_entities_stack.back().utf16_added_before;
|
||
result.entities.back().length += utf16_added - nested_entities_stack.back().utf16_added_before;
|
||
break;
|
||
}
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
|
||
while (current_entity < text.entities.size() && utf16_offset >= text.entities[current_entity].offset) {
|
||
CHECK(utf16_offset == text.entities[current_entity].offset);
|
||
switch (text.entities[current_entity].type) {
|
||
case MessageEntity::Type::Italic:
|
||
result.text += "__";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::Bold:
|
||
result.text += "**";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::Strikethrough:
|
||
result.text += "~~";
|
||
utf16_added += 2;
|
||
break;
|
||
case MessageEntity::Type::TextUrl:
|
||
result.text += '[';
|
||
utf16_added++;
|
||
break;
|
||
case MessageEntity::Type::Code:
|
||
result.text += '`';
|
||
utf16_added++;
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
result.text += "```";
|
||
utf16_added += 3;
|
||
break;
|
||
default:
|
||
// keep as is
|
||
break;
|
||
}
|
||
nested_entities_stack.emplace_back(&text.entities[current_entity++], utf16_added);
|
||
}
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
if (pos == text.text.size()) {
|
||
break;
|
||
}
|
||
|
||
result.text.push_back(text.text[pos]);
|
||
}
|
||
|
||
sort_entities(result.entities);
|
||
if (parse_markdown_v3(result) != text) {
|
||
return text;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static uint32 decode_html_entity(CSlice text, size_t &pos) {
|
||
auto c = static_cast<unsigned char>(text[pos]);
|
||
if (c != '&') {
|
||
return 0;
|
||
}
|
||
|
||
size_t end_pos = pos + 1;
|
||
uint32 res = 0;
|
||
if (text[pos + 1] == '#') {
|
||
// numeric character reference
|
||
end_pos++;
|
||
if (text[pos + 2] == 'x') {
|
||
// hexadecimal numeric character reference
|
||
end_pos++;
|
||
while (is_hex_digit(text[end_pos])) {
|
||
res = res * 16 + hex_to_int(text[end_pos++]);
|
||
}
|
||
} else {
|
||
// decimal numeric character reference
|
||
while (is_digit(text[end_pos])) {
|
||
res = res * 10 + text[end_pos++] - '0';
|
||
}
|
||
}
|
||
if (res == 0 || res >= 0x10ffff || end_pos - pos >= 10) {
|
||
return 0;
|
||
}
|
||
} else {
|
||
while (is_alpha(text[end_pos])) {
|
||
end_pos++;
|
||
}
|
||
Slice entity = text.substr(pos + 1, end_pos - pos - 1);
|
||
if (entity == Slice("lt")) {
|
||
res = static_cast<uint32>('<');
|
||
} else if (entity == Slice("gt")) {
|
||
res = static_cast<uint32>('>');
|
||
} else if (entity == Slice("amp")) {
|
||
res = static_cast<uint32>('&');
|
||
} else if (entity == Slice("quot")) {
|
||
res = static_cast<uint32>('"');
|
||
} else {
|
||
// unsupported literal entity
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
if (text[end_pos] == ';') {
|
||
pos = end_pos + 1;
|
||
} else {
|
||
pos = end_pos;
|
||
}
|
||
return res;
|
||
}
|
||
|
||
static Result<vector<MessageEntity>> do_parse_html(CSlice text, string &result) {
|
||
vector<MessageEntity> entities;
|
||
int32 utf16_offset = 0;
|
||
|
||
struct EntityInfo {
|
||
string tag_name;
|
||
string argument;
|
||
int32 entity_offset;
|
||
size_t entity_begin_pos;
|
||
|
||
EntityInfo(string tag_name, string argument, int32 entity_offset, size_t entity_begin_pos)
|
||
: tag_name(std::move(tag_name))
|
||
, argument(std::move(argument))
|
||
, entity_offset(entity_offset)
|
||
, entity_begin_pos(entity_begin_pos) {
|
||
}
|
||
};
|
||
std::vector<EntityInfo> nested_entities;
|
||
|
||
for (size_t i = 0; i < text.size(); i++) {
|
||
auto c = static_cast<unsigned char>(text[i]);
|
||
if (c == '&') {
|
||
auto ch = decode_html_entity(text, i);
|
||
if (ch != 0) {
|
||
i--; // i will be incremented in for
|
||
utf16_offset += 1 + (ch > 0xffff);
|
||
append_utf8_character(result, ch);
|
||
continue;
|
||
}
|
||
}
|
||
if (c != '<') {
|
||
if (is_utf8_character_first_code_unit(c)) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
result.push_back(text[i]);
|
||
continue;
|
||
}
|
||
|
||
auto begin_pos = i++;
|
||
if (text[i] != '/') {
|
||
// begin of an entity
|
||
while (!is_space(text[i]) && text[i] != '>') {
|
||
i++;
|
||
}
|
||
if (text[i] == 0) {
|
||
return Status::Error(400, PSLICE() << "Unclosed start tag at byte offset " << begin_pos);
|
||
}
|
||
|
||
string tag_name = to_lower(text.substr(begin_pos + 1, i - begin_pos - 1));
|
||
if (tag_name != "a" && tag_name != "b" && tag_name != "strong" && tag_name != "i" && tag_name != "em" &&
|
||
tag_name != "s" && tag_name != "strike" && tag_name != "del" && tag_name != "u" && tag_name != "ins" &&
|
||
tag_name != "pre" && tag_name != "code") {
|
||
return Status::Error(400, PSLICE()
|
||
<< "Unsupported start tag \"" << tag_name << "\" at byte offset " << begin_pos);
|
||
}
|
||
|
||
string argument;
|
||
while (text[i] != '>') {
|
||
while (text[i] != 0 && is_space(text[i])) {
|
||
i++;
|
||
}
|
||
if (text[i] == '>') {
|
||
break;
|
||
}
|
||
auto attribute_begin_pos = i;
|
||
while (!is_space(text[i]) && text[i] != '=') {
|
||
i++;
|
||
}
|
||
Slice attribute_name = text.substr(attribute_begin_pos, i - attribute_begin_pos);
|
||
if (attribute_name.empty()) {
|
||
return Status::Error(
|
||
400, PSLICE() << "Empty attribute name in the tag \"" << tag_name << "\" at byte offset " << begin_pos);
|
||
}
|
||
while (text[i] != 0 && is_space(text[i])) {
|
||
i++;
|
||
}
|
||
if (text[i] != '=') {
|
||
return Status::Error(400, PSLICE() << "Expected equal sign in declaration of an attribute of the tag \""
|
||
<< tag_name << "\" at byte offset " << begin_pos);
|
||
}
|
||
i++;
|
||
while (text[i] != 0 && is_space(text[i])) {
|
||
i++;
|
||
}
|
||
if (text[i] == 0) {
|
||
return Status::Error(400, PSLICE()
|
||
<< "Unclosed start tag \"" << tag_name << "\" at byte offset " << begin_pos);
|
||
}
|
||
|
||
string attribute_value;
|
||
if (text[i] != '\'' && text[i] != '"') {
|
||
// A name token (a sequence of letters, digits, periods, or hyphens). Name tokens are not case sensitive.
|
||
auto token_begin_pos = i;
|
||
while (is_alnum(text[i]) || text[i] == '.' || text[i] == '-') {
|
||
i++;
|
||
}
|
||
attribute_value = to_lower(text.substr(token_begin_pos, i - token_begin_pos));
|
||
|
||
if (!is_space(text[i]) && text[i] != '>') {
|
||
return Status::Error(400, PSLICE() << "Unexpected end of name token at byte offset " << token_begin_pos);
|
||
}
|
||
} else {
|
||
// A string literal
|
||
char end_character = text[i++];
|
||
while (text[i] != end_character && text[i] != 0) {
|
||
if (text[i] == '&') {
|
||
auto ch = decode_html_entity(text, i);
|
||
if (ch != 0) {
|
||
append_utf8_character(attribute_value, ch);
|
||
continue;
|
||
}
|
||
}
|
||
attribute_value.push_back(text[i++]);
|
||
}
|
||
if (text[i] == end_character) {
|
||
i++;
|
||
}
|
||
}
|
||
if (text[i] == 0) {
|
||
return Status::Error(400, PSLICE() << "Unclosed start tag at byte offset " << begin_pos);
|
||
}
|
||
|
||
if (tag_name == "a" && attribute_name == Slice("href")) {
|
||
argument = std::move(attribute_value);
|
||
}
|
||
if (tag_name == "code" && attribute_name == Slice("class") && begins_with(attribute_value, "language-")) {
|
||
argument = attribute_value.substr(9);
|
||
}
|
||
}
|
||
|
||
nested_entities.emplace_back(std::move(tag_name), std::move(argument), utf16_offset, result.size());
|
||
} else {
|
||
// end of an entity
|
||
if (nested_entities.empty()) {
|
||
return Status::Error(400, PSLICE() << "Unexpected end tag at byte offset " << begin_pos);
|
||
}
|
||
|
||
while (!is_space(text[i]) && text[i] != '>') {
|
||
i++;
|
||
}
|
||
Slice end_tag_name = text.substr(begin_pos + 2, i - begin_pos - 2);
|
||
while (is_space(text[i]) && text[i] != 0) {
|
||
i++;
|
||
}
|
||
if (text[i] != '>') {
|
||
return Status::Error(400, PSLICE() << "Unclosed end tag at byte offset " << begin_pos);
|
||
}
|
||
|
||
string tag_name = std::move(nested_entities.back().tag_name);
|
||
if (!end_tag_name.empty() && end_tag_name != tag_name) {
|
||
return Status::Error(400, PSLICE() << "Unmatched end tag at byte offset " << begin_pos << ", expected \"</"
|
||
<< tag_name << ">\", found \"</" << end_tag_name << ">\"");
|
||
}
|
||
|
||
if (utf16_offset > nested_entities.back().entity_offset) {
|
||
auto entity_offset = nested_entities.back().entity_offset;
|
||
auto entity_length = utf16_offset - entity_offset;
|
||
if (tag_name == "i" || tag_name == "em") {
|
||
entities.emplace_back(MessageEntity::Type::Italic, entity_offset, entity_length);
|
||
} else if (tag_name == "b" || tag_name == "strong") {
|
||
entities.emplace_back(MessageEntity::Type::Bold, entity_offset, entity_length);
|
||
} else if (tag_name == "s" || tag_name == "strike" || tag_name == "del") {
|
||
entities.emplace_back(MessageEntity::Type::Strikethrough, entity_offset, entity_length);
|
||
} else if (tag_name == "u" || tag_name == "ins") {
|
||
entities.emplace_back(MessageEntity::Type::Underline, entity_offset, entity_length);
|
||
} else if (tag_name == "a") {
|
||
auto url = std::move(nested_entities.back().argument);
|
||
if (url.empty()) {
|
||
url = result.substr(nested_entities.back().entity_begin_pos);
|
||
}
|
||
auto user_id = get_link_user_id(url);
|
||
if (user_id.is_valid()) {
|
||
entities.emplace_back(entity_offset, entity_length, user_id);
|
||
} else {
|
||
auto r_url = check_url(url);
|
||
if (r_url.is_ok()) {
|
||
entities.emplace_back(MessageEntity::Type::TextUrl, entity_offset, entity_length, r_url.move_as_ok());
|
||
}
|
||
}
|
||
} else if (tag_name == "pre") {
|
||
if (!entities.empty() && entities.back().type == MessageEntity::Type::Code &&
|
||
entities.back().offset == entity_offset && entities.back().length == entity_length &&
|
||
!entities.back().argument.empty()) {
|
||
entities.back().type = MessageEntity::Type::PreCode;
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::Pre, entity_offset, entity_length);
|
||
}
|
||
} else if (tag_name == "code") {
|
||
if (!entities.empty() && entities.back().type == MessageEntity::Type::Pre &&
|
||
entities.back().offset == entity_offset && entities.back().length == entity_length &&
|
||
!nested_entities.back().argument.empty()) {
|
||
entities.back().type = MessageEntity::Type::PreCode;
|
||
entities.back().argument = std::move(nested_entities.back().argument);
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::Code, entity_offset, entity_length,
|
||
nested_entities.back().argument);
|
||
}
|
||
} else {
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
nested_entities.pop_back();
|
||
}
|
||
}
|
||
if (!nested_entities.empty()) {
|
||
return Status::Error(
|
||
400, PSLICE() << "Can't find end tag corresponding to start tag " << nested_entities.back().tag_name);
|
||
}
|
||
|
||
for (auto &entity : entities) {
|
||
if (entity.type == MessageEntity::Type::Code && !entity.argument.empty()) {
|
||
entity.argument.clear();
|
||
}
|
||
}
|
||
|
||
sort_entities(entities);
|
||
|
||
return entities;
|
||
}
|
||
|
||
Result<vector<MessageEntity>> parse_html(string &text) {
|
||
string result;
|
||
TRY_RESULT(entities, do_parse_html(text, result));
|
||
if (!check_utf8(result)) {
|
||
return Status::Error(400,
|
||
"Text contains invalid Unicode characters after decoding HTML entities, check for unmatched "
|
||
"surrogate code units");
|
||
}
|
||
text = result;
|
||
return entities;
|
||
}
|
||
|
||
vector<tl_object_ptr<telegram_api::MessageEntity>> get_input_message_entities(const ContactsManager *contacts_manager,
|
||
const vector<MessageEntity> &entities,
|
||
const char *source) {
|
||
vector<tl_object_ptr<telegram_api::MessageEntity>> result;
|
||
for (auto &entity : entities) {
|
||
if (!is_user_entity(entity.type)) {
|
||
continue;
|
||
}
|
||
switch (entity.type) {
|
||
case MessageEntity::Type::Bold:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityBold>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Italic:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityItalic>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Underline:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityUnderline>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Strikethrough:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityStrike>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::BlockQuote:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityBlockquote>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Code:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityCode>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityPre>(entity.offset, entity.length, string()));
|
||
break;
|
||
case MessageEntity::Type::PreCode:
|
||
result.push_back(make_tl_object<telegram_api::messageEntityPre>(entity.offset, entity.length, entity.argument));
|
||
break;
|
||
case MessageEntity::Type::TextUrl:
|
||
result.push_back(
|
||
make_tl_object<telegram_api::messageEntityTextUrl>(entity.offset, entity.length, entity.argument));
|
||
break;
|
||
case MessageEntity::Type::MentionName: {
|
||
auto input_user = contacts_manager->get_input_user(entity.user_id);
|
||
LOG_CHECK(input_user != nullptr) << source;
|
||
result.push_back(make_tl_object<telegram_api::inputMessageEntityMentionName>(entity.offset, entity.length,
|
||
std::move(input_user)));
|
||
break;
|
||
}
|
||
case MessageEntity::Type::Mention:
|
||
case MessageEntity::Type::Hashtag:
|
||
case MessageEntity::Type::BotCommand:
|
||
case MessageEntity::Type::Url:
|
||
case MessageEntity::Type::EmailAddress:
|
||
case MessageEntity::Type::Cashtag:
|
||
case MessageEntity::Type::PhoneNumber:
|
||
case MessageEntity::Type::BankCardNumber:
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
vector<tl_object_ptr<telegram_api::MessageEntity>> get_input_message_entities(const ContactsManager *contacts_manager,
|
||
const FormattedText *text,
|
||
const char *source) {
|
||
if (text != nullptr && !text->entities.empty()) {
|
||
return get_input_message_entities(contacts_manager, text->entities, source);
|
||
}
|
||
return {};
|
||
}
|
||
|
||
vector<tl_object_ptr<secret_api::MessageEntity>> get_input_secret_message_entities(
|
||
const vector<MessageEntity> &entities, int32 layer) {
|
||
vector<tl_object_ptr<secret_api::MessageEntity>> result;
|
||
for (auto &entity : entities) {
|
||
switch (entity.type) {
|
||
case MessageEntity::Type::Mention:
|
||
result.push_back(make_tl_object<secret_api::messageEntityMention>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Hashtag:
|
||
result.push_back(make_tl_object<secret_api::messageEntityHashtag>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Cashtag:
|
||
break;
|
||
case MessageEntity::Type::BotCommand:
|
||
break;
|
||
case MessageEntity::Type::PhoneNumber:
|
||
break;
|
||
case MessageEntity::Type::BankCardNumber:
|
||
break;
|
||
case MessageEntity::Type::Url:
|
||
result.push_back(make_tl_object<secret_api::messageEntityUrl>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::EmailAddress:
|
||
result.push_back(make_tl_object<secret_api::messageEntityEmail>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Bold:
|
||
result.push_back(make_tl_object<secret_api::messageEntityBold>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Italic:
|
||
result.push_back(make_tl_object<secret_api::messageEntityItalic>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Underline:
|
||
if (layer >= SecretChatActor::NEW_ENTITIES_LAYER) {
|
||
result.push_back(make_tl_object<secret_api::messageEntityUnderline>(entity.offset, entity.length));
|
||
}
|
||
break;
|
||
case MessageEntity::Type::Strikethrough:
|
||
if (layer >= SecretChatActor::NEW_ENTITIES_LAYER) {
|
||
result.push_back(make_tl_object<secret_api::messageEntityStrike>(entity.offset, entity.length));
|
||
}
|
||
break;
|
||
case MessageEntity::Type::BlockQuote:
|
||
if (layer >= SecretChatActor::NEW_ENTITIES_LAYER) {
|
||
result.push_back(make_tl_object<secret_api::messageEntityBlockquote>(entity.offset, entity.length));
|
||
}
|
||
break;
|
||
case MessageEntity::Type::Code:
|
||
result.push_back(make_tl_object<secret_api::messageEntityCode>(entity.offset, entity.length));
|
||
break;
|
||
case MessageEntity::Type::Pre:
|
||
result.push_back(make_tl_object<secret_api::messageEntityPre>(entity.offset, entity.length, string()));
|
||
break;
|
||
case MessageEntity::Type::PreCode:
|
||
result.push_back(make_tl_object<secret_api::messageEntityPre>(entity.offset, entity.length, entity.argument));
|
||
break;
|
||
case MessageEntity::Type::TextUrl:
|
||
result.push_back(
|
||
make_tl_object<secret_api::messageEntityTextUrl>(entity.offset, entity.length, entity.argument));
|
||
break;
|
||
case MessageEntity::Type::MentionName:
|
||
break;
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
Result<vector<MessageEntity>> get_message_entities(const ContactsManager *contacts_manager,
|
||
vector<tl_object_ptr<td_api::textEntity>> &&input_entities,
|
||
bool allow_all) {
|
||
vector<MessageEntity> entities;
|
||
for (auto &entity : input_entities) {
|
||
if (entity == nullptr || entity->type_ == nullptr) {
|
||
continue;
|
||
}
|
||
|
||
switch (entity->type_->get_id()) {
|
||
case td_api::textEntityTypeMention::ID:
|
||
entities.emplace_back(MessageEntity::Type::Mention, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeHashtag::ID:
|
||
entities.emplace_back(MessageEntity::Type::Hashtag, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeBotCommand::ID:
|
||
entities.emplace_back(MessageEntity::Type::BotCommand, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeUrl::ID:
|
||
entities.emplace_back(MessageEntity::Type::Url, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeEmailAddress::ID:
|
||
entities.emplace_back(MessageEntity::Type::EmailAddress, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeCashtag::ID:
|
||
entities.emplace_back(MessageEntity::Type::Cashtag, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypePhoneNumber::ID:
|
||
entities.emplace_back(MessageEntity::Type::PhoneNumber, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeBankCardNumber::ID:
|
||
entities.emplace_back(MessageEntity::Type::BankCardNumber, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeBold::ID:
|
||
entities.emplace_back(MessageEntity::Type::Bold, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeItalic::ID:
|
||
entities.emplace_back(MessageEntity::Type::Italic, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeUnderline::ID:
|
||
entities.emplace_back(MessageEntity::Type::Underline, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeStrikethrough::ID:
|
||
entities.emplace_back(MessageEntity::Type::Strikethrough, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypeCode::ID:
|
||
entities.emplace_back(MessageEntity::Type::Code, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypePre::ID:
|
||
entities.emplace_back(MessageEntity::Type::Pre, entity->offset_, entity->length_);
|
||
break;
|
||
case td_api::textEntityTypePreCode::ID: {
|
||
auto entity_pre_code = static_cast<td_api::textEntityTypePreCode *>(entity->type_.get());
|
||
if (!clean_input_string(entity_pre_code->language_)) {
|
||
return Status::Error(400, "MessageEntityPreCode.language must be encoded in UTF-8");
|
||
}
|
||
entities.emplace_back(MessageEntity::Type::PreCode, entity->offset_, entity->length_,
|
||
entity_pre_code->language_);
|
||
break;
|
||
}
|
||
case td_api::textEntityTypeTextUrl::ID: {
|
||
auto entity_text_url = static_cast<td_api::textEntityTypeTextUrl *>(entity->type_.get());
|
||
if (!clean_input_string(entity_text_url->url_)) {
|
||
return Status::Error(400, "MessageEntityTextUrl.url must be encoded in UTF-8");
|
||
}
|
||
auto r_url = check_url(entity_text_url->url_);
|
||
if (r_url.is_error()) {
|
||
return Status::Error(400, PSTRING() << "Wrong message entity: " << r_url.error().message());
|
||
}
|
||
entities.emplace_back(MessageEntity::Type::TextUrl, entity->offset_, entity->length_, r_url.move_as_ok());
|
||
break;
|
||
}
|
||
case td_api::textEntityTypeMentionName::ID: {
|
||
auto entity_mention_name = static_cast<td_api::textEntityTypeMentionName *>(entity->type_.get());
|
||
UserId user_id(entity_mention_name->user_id_);
|
||
if (contacts_manager != nullptr && !contacts_manager->have_input_user(user_id)) {
|
||
return Status::Error(7, "Have no access to the user");
|
||
}
|
||
entities.emplace_back(entity->offset_, entity->length_, user_id);
|
||
break;
|
||
}
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
CHECK(!entities.empty());
|
||
if (!allow_all && !is_user_entity(entities.back().type)) {
|
||
entities.pop_back();
|
||
}
|
||
}
|
||
return entities;
|
||
}
|
||
|
||
vector<MessageEntity> get_message_entities(const ContactsManager *contacts_manager,
|
||
vector<tl_object_ptr<telegram_api::MessageEntity>> &&server_entities,
|
||
const char *source) {
|
||
vector<MessageEntity> entities;
|
||
entities.reserve(server_entities.size());
|
||
for (auto &entity : server_entities) {
|
||
switch (entity->get_id()) {
|
||
case telegram_api::messageEntityUnknown::ID:
|
||
break;
|
||
case telegram_api::messageEntityMention::ID: {
|
||
auto entity_mention = static_cast<const telegram_api::messageEntityMention *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Mention, entity_mention->offset_, entity_mention->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityHashtag::ID: {
|
||
auto entity_hashtag = static_cast<const telegram_api::messageEntityHashtag *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Hashtag, entity_hashtag->offset_, entity_hashtag->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityCashtag::ID: {
|
||
auto entity_cashtag = static_cast<const telegram_api::messageEntityCashtag *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Cashtag, entity_cashtag->offset_, entity_cashtag->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityPhone::ID: {
|
||
auto entity_phone = static_cast<const telegram_api::messageEntityPhone *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::PhoneNumber, entity_phone->offset_, entity_phone->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityBotCommand::ID: {
|
||
auto entity_bot_command = static_cast<const telegram_api::messageEntityBotCommand *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::BotCommand, entity_bot_command->offset_,
|
||
entity_bot_command->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityBankCard::ID: {
|
||
auto entity_bank_card = static_cast<const telegram_api::messageEntityBankCard *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::BankCardNumber, entity_bank_card->offset_,
|
||
entity_bank_card->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityUrl::ID: {
|
||
auto entity_url = static_cast<const telegram_api::messageEntityUrl *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Url, entity_url->offset_, entity_url->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityEmail::ID: {
|
||
auto entity_email = static_cast<const telegram_api::messageEntityEmail *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::EmailAddress, entity_email->offset_, entity_email->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityBold::ID: {
|
||
auto entity_bold = static_cast<const telegram_api::messageEntityBold *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Bold, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityItalic::ID: {
|
||
auto entity_italic = static_cast<const telegram_api::messageEntityItalic *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Italic, entity_italic->offset_, entity_italic->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityUnderline::ID: {
|
||
auto entity_bold = static_cast<const telegram_api::messageEntityUnderline *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Underline, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityStrike::ID: {
|
||
auto entity_bold = static_cast<const telegram_api::messageEntityStrike *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Strikethrough, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityBlockquote::ID: {
|
||
auto entity_bold = static_cast<const telegram_api::messageEntityBlockquote *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::BlockQuote, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityCode::ID: {
|
||
auto entity_code = static_cast<const telegram_api::messageEntityCode *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Code, entity_code->offset_, entity_code->length_);
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityPre::ID: {
|
||
auto entity_pre = static_cast<telegram_api::messageEntityPre *>(entity.get());
|
||
if (entity_pre->language_.empty()) {
|
||
entities.emplace_back(MessageEntity::Type::Pre, entity_pre->offset_, entity_pre->length_);
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::PreCode, entity_pre->offset_, entity_pre->length_,
|
||
std::move(entity_pre->language_));
|
||
}
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityTextUrl::ID: {
|
||
auto entity_text_url = static_cast<const telegram_api::messageEntityTextUrl *>(entity.get());
|
||
auto r_url = check_url(entity_text_url->url_);
|
||
if (r_url.is_error()) {
|
||
LOG(ERROR) << "Wrong URL entity: \"" << entity_text_url->url_ << "\": " << r_url.error().message() << " from "
|
||
<< source;
|
||
continue;
|
||
}
|
||
entities.emplace_back(MessageEntity::Type::TextUrl, entity_text_url->offset_, entity_text_url->length_,
|
||
r_url.move_as_ok());
|
||
break;
|
||
}
|
||
case telegram_api::messageEntityMentionName::ID: {
|
||
auto entity_mention_name = static_cast<const telegram_api::messageEntityMentionName *>(entity.get());
|
||
UserId user_id(entity_mention_name->user_id_);
|
||
if (!user_id.is_valid()) {
|
||
LOG(ERROR) << "Receive invalid " << user_id << " in MentionName from " << source;
|
||
continue;
|
||
}
|
||
if (contacts_manager == nullptr || !contacts_manager->have_user(user_id)) {
|
||
LOG(ERROR) << "Receive unknown " << user_id << " in MentionName from " << source;
|
||
continue;
|
||
}
|
||
if (!contacts_manager->have_input_user(user_id)) {
|
||
LOG(ERROR) << "Receive inaccessible " << user_id << " in MentionName from " << source;
|
||
continue;
|
||
}
|
||
entities.emplace_back(entity_mention_name->offset_, entity_mention_name->length_, user_id);
|
||
break;
|
||
}
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
return entities;
|
||
}
|
||
|
||
vector<MessageEntity> get_message_entities(vector<tl_object_ptr<secret_api::MessageEntity>> &&secret_entities) {
|
||
vector<MessageEntity> entities;
|
||
entities.reserve(secret_entities.size());
|
||
for (auto &entity : secret_entities) {
|
||
switch (entity->get_id()) {
|
||
case secret_api::messageEntityUnknown::ID:
|
||
break;
|
||
case secret_api::messageEntityMention::ID:
|
||
// skip, will find it ourselves
|
||
break;
|
||
case secret_api::messageEntityHashtag::ID:
|
||
// skip, will find it ourselves
|
||
break;
|
||
case secret_api::messageEntityCashtag::ID:
|
||
// skip, will find it ourselves
|
||
break;
|
||
case secret_api::messageEntityPhone::ID:
|
||
// skip, will find it ourselves
|
||
break;
|
||
case secret_api::messageEntityBotCommand::ID:
|
||
// skip all bot commands in secret chats
|
||
break;
|
||
case secret_api::messageEntityBankCard::ID:
|
||
// skip, will find it ourselves
|
||
break;
|
||
case secret_api::messageEntityUrl::ID: {
|
||
auto entity_url = static_cast<const secret_api::messageEntityUrl *>(entity.get());
|
||
// TODO skip URL when find_urls will be better
|
||
entities.emplace_back(MessageEntity::Type::Url, entity_url->offset_, entity_url->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityEmail::ID: {
|
||
auto entity_email = static_cast<const secret_api::messageEntityEmail *>(entity.get());
|
||
// TODO skip emails when find_urls will be better
|
||
entities.emplace_back(MessageEntity::Type::EmailAddress, entity_email->offset_, entity_email->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityBold::ID: {
|
||
auto entity_bold = static_cast<const secret_api::messageEntityBold *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Bold, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityItalic::ID: {
|
||
auto entity_italic = static_cast<const secret_api::messageEntityItalic *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Italic, entity_italic->offset_, entity_italic->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityUnderline::ID: {
|
||
auto entity_bold = static_cast<const secret_api::messageEntityUnderline *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Underline, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityStrike::ID: {
|
||
auto entity_bold = static_cast<const secret_api::messageEntityStrike *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Strikethrough, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityBlockquote::ID: {
|
||
auto entity_bold = static_cast<const secret_api::messageEntityBlockquote *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::BlockQuote, entity_bold->offset_, entity_bold->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityCode::ID: {
|
||
auto entity_code = static_cast<const secret_api::messageEntityCode *>(entity.get());
|
||
entities.emplace_back(MessageEntity::Type::Code, entity_code->offset_, entity_code->length_);
|
||
break;
|
||
}
|
||
case secret_api::messageEntityPre::ID: {
|
||
auto entity_pre = static_cast<secret_api::messageEntityPre *>(entity.get());
|
||
if (!clean_input_string(entity_pre->language_)) {
|
||
LOG(WARNING) << "Wrong language in entity: \"" << entity_pre->language_ << '"';
|
||
entity_pre->language_.clear();
|
||
}
|
||
if (entity_pre->language_.empty()) {
|
||
entities.emplace_back(MessageEntity::Type::Pre, entity_pre->offset_, entity_pre->length_);
|
||
} else {
|
||
entities.emplace_back(MessageEntity::Type::PreCode, entity_pre->offset_, entity_pre->length_,
|
||
std::move(entity_pre->language_));
|
||
}
|
||
break;
|
||
}
|
||
case secret_api::messageEntityTextUrl::ID: {
|
||
auto entity_text_url = static_cast<secret_api::messageEntityTextUrl *>(entity.get());
|
||
if (!clean_input_string(entity_text_url->url_)) {
|
||
LOG(WARNING) << "Wrong URL entity: \"" << entity_text_url->url_ << '"';
|
||
continue;
|
||
}
|
||
auto r_url = check_url(entity_text_url->url_);
|
||
if (r_url.is_error()) {
|
||
LOG(WARNING) << "Wrong URL entity: \"" << entity_text_url->url_ << "\": " << r_url.error().message();
|
||
continue;
|
||
}
|
||
entities.emplace_back(MessageEntity::Type::TextUrl, entity_text_url->offset_, entity_text_url->length_,
|
||
r_url.move_as_ok());
|
||
break;
|
||
}
|
||
case secret_api::messageEntityMentionName::ID:
|
||
// skip all name mentions in secret chats
|
||
break;
|
||
default:
|
||
UNREACHABLE();
|
||
}
|
||
}
|
||
return entities;
|
||
}
|
||
|
||
// like clean_input_string but also fixes entities
|
||
// entities must be sorted, can be nested, but must not intersect each other
|
||
static Result<string> clean_input_string_with_entities(const string &text, vector<MessageEntity> &entities) {
|
||
check_is_sorted(entities);
|
||
|
||
struct EntityInfo {
|
||
MessageEntity *entity;
|
||
int32 utf16_skipped_before;
|
||
|
||
EntityInfo(MessageEntity *entity, int32 utf16_skipped_before)
|
||
: entity(entity), utf16_skipped_before(utf16_skipped_before) {
|
||
}
|
||
};
|
||
vector<EntityInfo> nested_entities_stack;
|
||
size_t current_entity = 0;
|
||
|
||
int32 utf16_offset = 0;
|
||
int32 utf16_skipped = 0;
|
||
|
||
size_t text_size = text.size();
|
||
|
||
string result;
|
||
result.reserve(text_size);
|
||
for (size_t pos = 0; pos <= text_size; pos++) {
|
||
auto c = static_cast<unsigned char>(text[pos]);
|
||
bool is_utf8_character_begin = is_utf8_character_first_code_unit(c);
|
||
if (is_utf8_character_begin) {
|
||
while (!nested_entities_stack.empty()) {
|
||
auto *entity = nested_entities_stack.back().entity;
|
||
auto entity_end = entity->offset + entity->length;
|
||
if (utf16_offset < entity_end) {
|
||
break;
|
||
}
|
||
|
||
if (utf16_offset != entity_end) {
|
||
CHECK(utf16_offset == entity_end + 1);
|
||
return Status::Error(400, PSLICE() << "Entity beginning at UTF-16 offset " << entity->offset
|
||
<< " ends in a middle of a UTF-16 symbol at byte offset " << pos);
|
||
}
|
||
|
||
auto skipped_before_current_entity = nested_entities_stack.back().utf16_skipped_before;
|
||
entity->offset -= skipped_before_current_entity;
|
||
entity->length -= utf16_skipped - skipped_before_current_entity;
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
while (current_entity < entities.size() && utf16_offset >= entities[current_entity].offset) {
|
||
if (utf16_offset != entities[current_entity].offset) {
|
||
CHECK(utf16_offset == entities[current_entity].offset + 1);
|
||
return Status::Error(400, PSLICE() << "Entity begins in a middle of a UTF-16 symbol at byte offset " << pos);
|
||
}
|
||
nested_entities_stack.emplace_back(&entities[current_entity++], utf16_skipped);
|
||
}
|
||
}
|
||
if (pos == text_size) {
|
||
break;
|
||
}
|
||
|
||
switch (c) {
|
||
// remove control characters
|
||
case 0:
|
||
case 1:
|
||
case 2:
|
||
case 3:
|
||
case 4:
|
||
case 5:
|
||
case 6:
|
||
case 7:
|
||
case 8:
|
||
case 9:
|
||
// allow '\n'
|
||
case 11:
|
||
case 12:
|
||
// ignore '\r'
|
||
case 14:
|
||
case 15:
|
||
case 16:
|
||
case 17:
|
||
case 18:
|
||
case 19:
|
||
case 20:
|
||
case 21:
|
||
case 22:
|
||
case 23:
|
||
case 24:
|
||
case 25:
|
||
case 26:
|
||
case 27:
|
||
case 28:
|
||
case 29:
|
||
case 30:
|
||
case 31:
|
||
case 32:
|
||
result.push_back(' ');
|
||
utf16_offset++;
|
||
break;
|
||
case '\r':
|
||
// skip
|
||
utf16_offset++;
|
||
utf16_skipped++;
|
||
break;
|
||
default:
|
||
if (is_utf8_character_begin) {
|
||
utf16_offset += 1 + (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
}
|
||
if (c == 0xe2 && pos + 2 < text_size) {
|
||
unsigned char next = static_cast<unsigned char>(text[pos + 1]);
|
||
if (next == 0x80) {
|
||
next = static_cast<unsigned char>(text[pos + 2]);
|
||
if (0xa8 <= next && next <= 0xae) {
|
||
pos += 2;
|
||
utf16_skipped++;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (c == 0xcc && pos + 1 < text_size) {
|
||
unsigned char next = static_cast<unsigned char>(text[pos + 1]);
|
||
// remove vertical lines
|
||
if (next == 0xb3 || next == 0xbf || next == 0x8a) {
|
||
pos++;
|
||
utf16_skipped++;
|
||
break;
|
||
}
|
||
}
|
||
|
||
result.push_back(text[pos]);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (current_entity != entities.size()) {
|
||
return Status::Error(400, PSLICE() << "Entity begins after the end of the text at UTF-16 offset "
|
||
<< entities[current_entity].offset);
|
||
}
|
||
if (!nested_entities_stack.empty()) {
|
||
auto *entity = nested_entities_stack.back().entity;
|
||
return Status::Error(400, PSLICE() << "Entity beginning at UTF-16 offset " << entity->offset
|
||
<< " ends after the end of the text at UTF-16 offset "
|
||
<< entity->offset + entity->length);
|
||
}
|
||
|
||
replace_offending_characters(result);
|
||
|
||
return result;
|
||
}
|
||
|
||
// removes entities containing whitespaces only
|
||
// entities must be sorted by offset and length, but not necessary by type
|
||
// returns {last_non_whitespace_pos, last_non_whitespace_utf16_offset}
|
||
static std::pair<size_t, int32> remove_invalid_entities(const string &text, vector<MessageEntity> &entities) {
|
||
// check_is_sorted(entities);
|
||
vector<MessageEntity *> nested_entities_stack;
|
||
size_t current_entity = 0;
|
||
|
||
size_t last_non_whitespace_pos = text.size();
|
||
|
||
int32 utf16_offset = 0;
|
||
int32 last_space_utf16_offset = -1;
|
||
int32 last_non_whitespace_utf16_offset = -1;
|
||
|
||
td::remove_if(entities, [](const auto &entity) { return entity.length == 0; });
|
||
|
||
for (size_t pos = 0; pos <= text.size(); pos++) {
|
||
while (!nested_entities_stack.empty()) {
|
||
auto *entity = nested_entities_stack.back();
|
||
auto entity_end = entity->offset + entity->length;
|
||
if (utf16_offset < entity_end) {
|
||
break;
|
||
}
|
||
|
||
auto have_hidden_data = entity->type == MessageEntity::Type::TextUrl ||
|
||
entity->type == MessageEntity::Type::MentionName || is_pre_entity(entity->type);
|
||
if (last_non_whitespace_utf16_offset >= entity->offset ||
|
||
(last_space_utf16_offset >= entity->offset && have_hidden_data)) {
|
||
// TODO check entity for validness, for example, that mentions, hashtags, cashtags and URLs are valid
|
||
// keep entity
|
||
} else {
|
||
entity->length = 0;
|
||
}
|
||
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
while (current_entity < entities.size() && utf16_offset >= entities[current_entity].offset) {
|
||
nested_entities_stack.push_back(&entities[current_entity++]);
|
||
}
|
||
|
||
if (pos == text.size()) {
|
||
break;
|
||
}
|
||
|
||
if (!nested_entities_stack.empty() && nested_entities_stack.back()->offset == utf16_offset &&
|
||
(text[pos] == '\n' || text[pos] == ' ')) {
|
||
// entities was fixed, so there can't be more than one splittable entity of each type, one blockquote and
|
||
// one continuous entity for the given offset
|
||
for (size_t i = nested_entities_stack.size(); i > 0; i--) {
|
||
auto *entity = nested_entities_stack[i - 1];
|
||
if (entity->offset != utf16_offset || entity->type == MessageEntity::Type::TextUrl ||
|
||
entity->type == MessageEntity::Type::MentionName || is_pre_entity(entity->type)) {
|
||
break;
|
||
}
|
||
entity->offset++;
|
||
entity->length--;
|
||
if (entity->length == 0) {
|
||
CHECK(i == nested_entities_stack.size());
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
}
|
||
}
|
||
|
||
auto c = static_cast<unsigned char>(text[pos]);
|
||
switch (c) {
|
||
case '\n':
|
||
break;
|
||
case 32:
|
||
last_space_utf16_offset = utf16_offset;
|
||
break;
|
||
default:
|
||
while (!is_utf8_character_first_code_unit(static_cast<unsigned char>(text[pos + 1]))) {
|
||
pos++;
|
||
}
|
||
utf16_offset += (c >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
|
||
last_non_whitespace_pos = pos;
|
||
last_non_whitespace_utf16_offset = utf16_offset;
|
||
break;
|
||
}
|
||
|
||
utf16_offset++;
|
||
}
|
||
CHECK(nested_entities_stack.empty());
|
||
CHECK(current_entity == entities.size());
|
||
|
||
td::remove_if(entities, [](const auto &entity) { return entity.length == 0; });
|
||
|
||
return {last_non_whitespace_pos, last_non_whitespace_utf16_offset};
|
||
}
|
||
|
||
// enitities must contain only splittable entities
|
||
void split_entities(vector<MessageEntity> &entities, const vector<MessageEntity> &other_entities) {
|
||
check_is_sorted(entities);
|
||
check_is_sorted(other_entities);
|
||
|
||
int32 begin_pos[SPLITTABLE_ENTITY_TYPE_COUNT] = {};
|
||
int32 end_pos[SPLITTABLE_ENTITY_TYPE_COUNT] = {};
|
||
auto it = entities.begin();
|
||
vector<MessageEntity> result;
|
||
auto add_entities = [&](int32 end_offset) {
|
||
auto flush_entities = [&](int32 offset) {
|
||
for (auto type : {MessageEntity::Type::Bold, MessageEntity::Type::Italic, MessageEntity::Type::Underline,
|
||
MessageEntity::Type::Strikethrough}) {
|
||
auto index = get_splittable_entity_type_index(type);
|
||
if (end_pos[index] != 0 && begin_pos[index] < offset) {
|
||
if (end_pos[index] <= offset) {
|
||
result.emplace_back(type, begin_pos[index], end_pos[index] - begin_pos[index]);
|
||
begin_pos[index] = 0;
|
||
end_pos[index] = 0;
|
||
} else {
|
||
result.emplace_back(type, begin_pos[index], offset - begin_pos[index]);
|
||
begin_pos[index] = offset;
|
||
}
|
||
}
|
||
}
|
||
};
|
||
|
||
while (it != entities.end()) {
|
||
if (it->offset >= end_offset) {
|
||
break;
|
||
}
|
||
CHECK(is_splittable_entity(it->type));
|
||
auto index = get_splittable_entity_type_index(it->type);
|
||
if (it->offset <= end_pos[index] && end_pos[index] != 0) {
|
||
if (it->offset + it->length > end_pos[index]) {
|
||
end_pos[index] = it->offset + it->length;
|
||
}
|
||
} else {
|
||
flush_entities(it->offset);
|
||
begin_pos[index] = it->offset;
|
||
end_pos[index] = it->offset + it->length;
|
||
}
|
||
++it;
|
||
}
|
||
flush_entities(end_offset);
|
||
};
|
||
|
||
vector<const MessageEntity *> nested_entities_stack;
|
||
auto add_offset = [&](int32 offset) {
|
||
while (!nested_entities_stack.empty() &&
|
||
offset >= nested_entities_stack.back()->offset + nested_entities_stack.back()->length) {
|
||
// remove non-intersecting entities from the stack
|
||
auto old_size = result.size();
|
||
add_entities(nested_entities_stack.back()->offset + nested_entities_stack.back()->length);
|
||
if (is_pre_entity(nested_entities_stack.back()->type)) {
|
||
result.resize(old_size);
|
||
}
|
||
nested_entities_stack.pop_back();
|
||
}
|
||
|
||
add_entities(offset);
|
||
};
|
||
for (auto &other_entity : other_entities) {
|
||
add_offset(other_entity.offset);
|
||
nested_entities_stack.push_back(&other_entity);
|
||
}
|
||
add_offset(std::numeric_limits<int32>::max());
|
||
|
||
entities = std::move(result);
|
||
|
||
// entities are sorted only by offset now, re-sort if needed
|
||
sort_entities(entities);
|
||
}
|
||
|
||
static vector<MessageEntity> resplit_entities(vector<MessageEntity> &&splittable_entities,
|
||
vector<MessageEntity> &&entities) {
|
||
if (!splittable_entities.empty()) {
|
||
split_entities(splittable_entities, entities); // can merge some entities
|
||
|
||
if (entities.empty()) {
|
||
return std::move(splittable_entities);
|
||
}
|
||
|
||
combine(entities, std::move(splittable_entities));
|
||
sort_entities(entities);
|
||
}
|
||
return std::move(entities);
|
||
}
|
||
|
||
static void fix_entities(vector<MessageEntity> &entities) {
|
||
sort_entities(entities);
|
||
|
||
if (are_entities_valid(entities)) {
|
||
// fast path
|
||
return;
|
||
}
|
||
|
||
vector<MessageEntity> continuous_entities;
|
||
vector<MessageEntity> blockquote_entities;
|
||
vector<MessageEntity> splittable_entities;
|
||
for (auto &entity : entities) {
|
||
if (is_splittable_entity(entity.type)) {
|
||
splittable_entities.push_back(std::move(entity));
|
||
} else if (is_blockquote_entity(entity.type)) {
|
||
blockquote_entities.push_back(std::move(entity));
|
||
} else {
|
||
continuous_entities.push_back(std::move(entity));
|
||
}
|
||
}
|
||
remove_intersecting_entities(continuous_entities); // continuous entities can't intersect each other
|
||
|
||
if (!blockquote_entities.empty()) {
|
||
remove_intersecting_entities(blockquote_entities); // blockquote entities can't intersect each other
|
||
|
||
// blockquote entities can contain continuous entities, but can't intersect them in the other ways
|
||
remove_entities_intersecting_blockquote(continuous_entities, blockquote_entities);
|
||
|
||
combine(continuous_entities, std::move(blockquote_entities));
|
||
sort_entities(continuous_entities);
|
||
}
|
||
|
||
// must be called once to not merge some adjacent entities
|
||
entities = resplit_entities(std::move(splittable_entities), std::move(continuous_entities));
|
||
check_is_sorted(entities);
|
||
}
|
||
|
||
static void merge_new_entities(vector<MessageEntity> &entities, vector<MessageEntity> new_entities) {
|
||
check_is_sorted(entities);
|
||
if (new_entities.empty()) {
|
||
// fast path
|
||
return;
|
||
}
|
||
|
||
check_non_intersecting(new_entities);
|
||
|
||
vector<MessageEntity> continuous_entities;
|
||
vector<MessageEntity> blockquote_entities;
|
||
vector<MessageEntity> splittable_entities;
|
||
for (auto &entity : entities) {
|
||
if (is_splittable_entity(entity.type)) {
|
||
splittable_entities.push_back(std::move(entity));
|
||
} else if (is_blockquote_entity(entity.type)) {
|
||
blockquote_entities.push_back(std::move(entity));
|
||
} else {
|
||
continuous_entities.push_back(std::move(entity));
|
||
}
|
||
}
|
||
|
||
remove_entities_intersecting_blockquote(new_entities, blockquote_entities);
|
||
|
||
// merge before combining with blockquote entities
|
||
continuous_entities = merge_entities(std::move(continuous_entities), std::move(new_entities));
|
||
|
||
if (!blockquote_entities.empty()) {
|
||
combine(continuous_entities, std::move(blockquote_entities));
|
||
sort_entities(continuous_entities);
|
||
}
|
||
|
||
// must be called once to not merge some adjacent entities
|
||
entities = resplit_entities(std::move(splittable_entities), std::move(continuous_entities));
|
||
check_is_sorted(entities);
|
||
}
|
||
|
||
Status fix_formatted_text(string &text, vector<MessageEntity> &entities, bool allow_empty, bool skip_new_entities,
|
||
bool skip_bot_commands, bool for_draft) {
|
||
if (!check_utf8(text)) {
|
||
return Status::Error(400, "Strings must be encoded in UTF-8");
|
||
}
|
||
|
||
for (auto &entity : entities) {
|
||
if (entity.offset < 0 || entity.offset > 1000000) {
|
||
return Status::Error(400, PSLICE() << "Receive an entity with incorrect offset " << entity.offset);
|
||
}
|
||
if (entity.length < 0 || entity.length > 1000000) {
|
||
return Status::Error(400, PSLICE() << "Receive an entity with incorrect length " << entity.length);
|
||
}
|
||
}
|
||
td::remove_if(entities, [](const MessageEntity &entity) { return entity.length == 0; });
|
||
|
||
fix_entities(entities);
|
||
|
||
TRY_RESULT(result, clean_input_string_with_entities(text, entities));
|
||
|
||
// now entities are still sorted by offset and length, but not type,
|
||
// because some characters could be deleted and after that some entities begin to share a common end
|
||
|
||
size_t last_non_whitespace_pos;
|
||
int32 last_non_whitespace_utf16_offset;
|
||
std::tie(last_non_whitespace_pos, last_non_whitespace_utf16_offset) = remove_invalid_entities(result, entities);
|
||
if (last_non_whitespace_utf16_offset == -1) {
|
||
if (allow_empty) {
|
||
text.clear();
|
||
entities.clear();
|
||
return Status::OK();
|
||
}
|
||
return Status::Error(3, "Message must be non-empty");
|
||
}
|
||
|
||
// re-fix entities if needed after removal of some characters
|
||
// the sort order can be incorrect by type
|
||
// some splittable entities may be needed to be concatenated
|
||
fix_entities(entities);
|
||
|
||
if (for_draft) {
|
||
text = std::move(result);
|
||
} else {
|
||
// rtrim
|
||
CHECK(last_non_whitespace_pos < result.size());
|
||
result.resize(last_non_whitespace_pos + 1);
|
||
while (!entities.empty() && entities.back().offset > last_non_whitespace_utf16_offset) {
|
||
CHECK(entities.back().type == MessageEntity::Type::TextUrl ||
|
||
entities.back().type == MessageEntity::Type::MentionName || is_pre_entity(entities.back().type));
|
||
entities.pop_back();
|
||
}
|
||
bool need_sort = false;
|
||
for (auto &entity : entities) {
|
||
if (entity.offset + entity.length > last_non_whitespace_utf16_offset + 1) {
|
||
entity.length = last_non_whitespace_utf16_offset + 1 - entity.offset;
|
||
need_sort = true;
|
||
CHECK(entity.length > 0);
|
||
}
|
||
}
|
||
if (need_sort) {
|
||
sort_entities(entities);
|
||
}
|
||
|
||
// ltrim
|
||
size_t first_non_whitespaces_pos = 0;
|
||
size_t first_entity_begin_pos = entities.empty() ? result.size() : entities[0].offset;
|
||
while (first_non_whitespaces_pos < first_entity_begin_pos &&
|
||
(result[first_non_whitespaces_pos] == ' ' || result[first_non_whitespaces_pos] == '\n')) {
|
||
first_non_whitespaces_pos++;
|
||
}
|
||
if (first_non_whitespaces_pos > 0) {
|
||
int32 offset = narrow_cast<int32>(first_non_whitespaces_pos);
|
||
text = result.substr(first_non_whitespaces_pos);
|
||
for (auto &entity : entities) {
|
||
entity.offset -= offset;
|
||
CHECK(entity.offset >= 0);
|
||
}
|
||
} else {
|
||
text = std::move(result);
|
||
}
|
||
}
|
||
LOG_CHECK(check_utf8(text)) << text;
|
||
|
||
if (!allow_empty && is_empty_string(text)) {
|
||
return Status::Error(3, "Message must be non-empty");
|
||
}
|
||
|
||
constexpr size_t LENGTH_LIMIT = 35000; // server side limit
|
||
if (text.size() > LENGTH_LIMIT) {
|
||
size_t new_size = LENGTH_LIMIT;
|
||
while (!is_utf8_character_first_code_unit(text[new_size])) {
|
||
new_size--;
|
||
}
|
||
text.resize(new_size);
|
||
|
||
td::remove_if(entities, [text_utf16_length = text_length(text)](const auto &entity) {
|
||
return entity.offset + entity.length > text_utf16_length;
|
||
});
|
||
}
|
||
|
||
if (!skip_new_entities) {
|
||
merge_new_entities(entities, find_entities(text, skip_bot_commands));
|
||
}
|
||
|
||
// new whitespace-only entities could be added after splitting of entities
|
||
remove_invalid_entities(text, entities);
|
||
|
||
// TODO MAX_MESSAGE_LENGTH and MAX_CAPTION_LENGTH
|
||
|
||
return Status::OK();
|
||
}
|
||
|
||
FormattedText get_message_text(const ContactsManager *contacts_manager, string message_text,
|
||
vector<tl_object_ptr<telegram_api::MessageEntity>> &&server_entities,
|
||
bool skip_new_entities, int32 send_date, bool from_album, const char *source) {
|
||
auto entities = get_message_entities(contacts_manager, std::move(server_entities), source);
|
||
auto debug_message_text = message_text;
|
||
auto debug_entities = entities;
|
||
auto status = fix_formatted_text(message_text, entities, true, skip_new_entities, true, false);
|
||
if (status.is_error()) {
|
||
if (!from_album && (send_date == 0 || send_date > 1579219200)) { // approximate fix date
|
||
LOG(ERROR) << "Receive error " << status << " while parsing message text from " << source << " with content \""
|
||
<< debug_message_text << "\" -> \"" << message_text << "\" sent at " << send_date << " with entities "
|
||
<< format::as_array(debug_entities) << " -> " << format::as_array(entities);
|
||
}
|
||
if (!clean_input_string(message_text)) {
|
||
message_text.clear();
|
||
}
|
||
entities = find_entities(message_text, false);
|
||
}
|
||
return FormattedText{std::move(message_text), std::move(entities)};
|
||
}
|
||
|
||
td_api::object_ptr<td_api::formattedText> extract_input_caption(
|
||
tl_object_ptr<td_api::InputMessageContent> &input_message_content) {
|
||
switch (input_message_content->get_id()) {
|
||
case td_api::inputMessageAnimation::ID: {
|
||
auto input_animation = static_cast<td_api::inputMessageAnimation *>(input_message_content.get());
|
||
return std::move(input_animation->caption_);
|
||
}
|
||
case td_api::inputMessageAudio::ID: {
|
||
auto input_audio = static_cast<td_api::inputMessageAudio *>(input_message_content.get());
|
||
return std::move(input_audio->caption_);
|
||
}
|
||
case td_api::inputMessageDocument::ID: {
|
||
auto input_document = static_cast<td_api::inputMessageDocument *>(input_message_content.get());
|
||
return std::move(input_document->caption_);
|
||
}
|
||
case td_api::inputMessagePhoto::ID: {
|
||
auto input_photo = static_cast<td_api::inputMessagePhoto *>(input_message_content.get());
|
||
return std::move(input_photo->caption_);
|
||
}
|
||
case td_api::inputMessageVideo::ID: {
|
||
auto input_video = static_cast<td_api::inputMessageVideo *>(input_message_content.get());
|
||
return std::move(input_video->caption_);
|
||
}
|
||
case td_api::inputMessageVoiceNote::ID: {
|
||
auto input_voice_note = static_cast<td_api::inputMessageVoiceNote *>(input_message_content.get());
|
||
return std::move(input_voice_note->caption_);
|
||
}
|
||
default:
|
||
return nullptr;
|
||
}
|
||
}
|
||
|
||
Result<FormattedText> process_input_caption(const ContactsManager *contacts_manager, DialogId dialog_id,
|
||
tl_object_ptr<td_api::formattedText> &&caption, bool is_bot) {
|
||
if (caption == nullptr) {
|
||
return FormattedText();
|
||
}
|
||
TRY_RESULT(entities, get_message_entities(contacts_manager, std::move(caption->entities_)));
|
||
TRY_STATUS(fix_formatted_text(caption->text_, entities, true, false,
|
||
need_skip_bot_commands(contacts_manager, dialog_id, is_bot), false));
|
||
return FormattedText{std::move(caption->text_), std::move(entities)};
|
||
}
|
||
|
||
void add_formatted_text_dependencies(Dependencies &dependencies, const FormattedText *text) {
|
||
if (text == nullptr) {
|
||
return;
|
||
}
|
||
for (auto &entity : text->entities) {
|
||
if (entity.user_id.is_valid()) {
|
||
dependencies.user_ids.insert(entity.user_id);
|
||
}
|
||
}
|
||
}
|
||
|
||
bool need_skip_bot_commands(const ContactsManager *contacts_manager, DialogId dialog_id, bool is_bot) {
|
||
if (!dialog_id.is_valid()) {
|
||
return true;
|
||
}
|
||
if (is_bot) {
|
||
return false;
|
||
}
|
||
|
||
switch (dialog_id.get_type()) {
|
||
case DialogType::User:
|
||
return !contacts_manager->is_user_bot(dialog_id.get_user_id());
|
||
case DialogType::SecretChat: {
|
||
auto user_id = contacts_manager->get_secret_chat_user_id(dialog_id.get_secret_chat_id());
|
||
return !user_id.is_valid() || !contacts_manager->is_user_bot(user_id);
|
||
}
|
||
case DialogType::Chat:
|
||
case DialogType::Channel:
|
||
case DialogType::None:
|
||
return false;
|
||
default:
|
||
UNREACHABLE();
|
||
return false;
|
||
}
|
||
}
|
||
|
||
} // namespace td
|