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tdlib-fork/td/telegram/MessageEntity.cpp
levlam a92860a046 Better strip_empty_characters.
GitOrigin-RevId: 35863d02683e75da361712647d643866ae4800cf
2018-03-21 17:54:39 +03:00

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This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/telegram/MessageEntity.h"
#include "td/telegram/ContactsManager.h"
#include "td/telegram/misc.h"
#include "td/utils/HttpUrl.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/unicode.h"
#include "td/utils/utf8.h"
#include <algorithm>
#include <cstring>
#include <tuple>
#include <unordered_set>
namespace td {
StringBuilder &operator<<(StringBuilder &string_builder, const MessageEntity &message_entity) {
bool has_argument = false;
string_builder << '[';
switch (message_entity.type) {
case MessageEntity::Type::Mention:
string_builder << "Mention";
break;
case MessageEntity::Type::Hashtag:
string_builder << "Hashtag";
break;
case MessageEntity::Type::BotCommand:
string_builder << "BotCommand";
break;
case MessageEntity::Type::Url:
string_builder << "Url";
break;
case MessageEntity::Type::EmailAddress:
string_builder << "EmailAddress";
break;
case MessageEntity::Type::Bold:
string_builder << "Bold";
break;
case MessageEntity::Type::Italic:
string_builder << "Italic";
break;
case MessageEntity::Type::Code:
string_builder << "Code";
break;
case MessageEntity::Type::Pre:
string_builder << "Pre";
break;
case MessageEntity::Type::PreCode:
string_builder << "PreCode";
has_argument = true;
break;
case MessageEntity::Type::TextUrl:
string_builder << "TextUrl";
has_argument = true;
break;
case MessageEntity::Type::MentionName:
string_builder << "MentionName";
break;
case MessageEntity::Type::Cashtag:
string_builder << "Cashtag";
break;
case MessageEntity::Type::PhoneNumber:
string_builder << "PhoneNumber";
break;
default:
UNREACHABLE();
string_builder << "Impossible";
break;
}
string_builder << ", offset = " << message_entity.offset << ", length = " << message_entity.length;
if (has_argument) {
string_builder << ", argument = \"" << message_entity.argument << "\"";
}
if (message_entity.user_id.is_valid()) {
string_builder << ", " << message_entity.user_id;
}
string_builder << ']';
return string_builder;
}
tl_object_ptr<td_api::TextEntityType> MessageEntity::get_text_entity_type_object() const {
switch (type) {
case MessageEntity::Type::Mention:
return make_tl_object<td_api::textEntityTypeMention>();
case MessageEntity::Type::Hashtag:
return make_tl_object<td_api::textEntityTypeHashtag>();
case MessageEntity::Type::BotCommand:
return make_tl_object<td_api::textEntityTypeBotCommand>();
case MessageEntity::Type::Url:
return make_tl_object<td_api::textEntityTypeUrl>();
case MessageEntity::Type::EmailAddress:
return make_tl_object<td_api::textEntityTypeEmailAddress>();
case MessageEntity::Type::Bold:
return make_tl_object<td_api::textEntityTypeBold>();
case MessageEntity::Type::Italic:
return make_tl_object<td_api::textEntityTypeItalic>();
case MessageEntity::Type::Code:
return make_tl_object<td_api::textEntityTypeCode>();
case MessageEntity::Type::Pre:
return make_tl_object<td_api::textEntityTypePre>();
case MessageEntity::Type::PreCode:
return make_tl_object<td_api::textEntityTypePreCode>(argument);
case MessageEntity::Type::TextUrl:
return make_tl_object<td_api::textEntityTypeTextUrl>(argument);
case MessageEntity::Type::MentionName:
return make_tl_object<td_api::textEntityTypeMentionName>(user_id.get());
case MessageEntity::Type::Cashtag:
return make_tl_object<td_api::textEntityTypeCashtag>();
case MessageEntity::Type::PhoneNumber:
return make_tl_object<td_api::textEntityTypePhoneNumber>();
default:
UNREACHABLE();
return nullptr;
}
}
tl_object_ptr<td_api::textEntity> MessageEntity::get_text_entity_object() const {
return make_tl_object<td_api::textEntity>(offset, length, get_text_entity_type_object());
}
vector<tl_object_ptr<td_api::textEntity>> get_text_entities_object(const vector<MessageEntity> &entities) {
vector<tl_object_ptr<td_api::textEntity>> result;
result.reserve(entities.size());
for (auto &entity : entities) {
result.push_back(entity.get_text_entity_object());
}
return result;
}
static bool is_word_character(uint32 code) {
switch (get_unicode_simple_category(code)) {
case UnicodeSimpleCategory::Letter:
case UnicodeSimpleCategory::DecimalNumber:
case UnicodeSimpleCategory::Number:
return true;
default:
return code == '_';
}
}
td_api::object_ptr<td_api::formattedText> get_formatted_text_object(const FormattedText &text) {
return td_api::make_object<td_api::formattedText>(text.text, get_text_entities_object(text.entities));
}
/*
static bool is_word_boundary(uint32 a, uint32 b) {
return is_word_character(a) ^ is_word_character(b);
}
*/
static bool is_alpha_digit(uint32 code) {
return ('0' <= code && code <= '9') || ('a' <= code && code <= 'z') || ('A' <= code && code <= 'Z');
}
static bool is_alpha_digit_or_underscore(uint32 code) {
return is_alpha_digit(code) || code == '_';
}
static bool is_alpha_digit_or_underscore_or_minus(uint32 code) {
return is_alpha_digit_or_underscore(code) || code == '-';
}
// This functions just implements corresponding regexps
// All other fixes will be in other functions
static vector<Slice> match_mentions(Slice str) {
vector<Slice> result;
const unsigned char *begin = str.ubegin();
const unsigned char *end = str.uend();
const unsigned char *ptr = begin;
// '/(?<=\B)@([a-zA-Z0-9_]{2,32})(?=\b)/u'
while (true) {
ptr = reinterpret_cast<const unsigned char *>(std::memchr(ptr, '@', narrow_cast<int32>(end - ptr)));
if (ptr == nullptr) {
break;
}
if (ptr != begin) {
uint32 prev;
next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev);
if (is_word_character(prev)) {
ptr++;
continue;
}
}
auto mention_begin = ++ptr;
while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
ptr++;
}
auto mention_end = ptr;
auto mention_size = mention_end - mention_begin;
if (mention_size < 2 || mention_size > 32) {
continue;
}
uint32 next = 0;
if (ptr != end) {
next_utf8_unsafe(ptr, &next);
}
if (is_word_character(next)) {
continue;
}
result.emplace_back(mention_begin - 1, mention_end);
}
return result;
}
static vector<Slice> match_bot_commands(Slice str) {
vector<Slice> result;
const unsigned char *begin = str.ubegin();
const unsigned char *end = str.uend();
const unsigned char *ptr = begin;
// '/(?<!\b|[\/<>])\/([a-zA-Z0-9_]{1,64})(?:@([a-zA-Z0-9_]{3,32}))?(?!\B|[\/<>])/u'
while (true) {
ptr = reinterpret_cast<const unsigned char *>(std::memchr(ptr, '/', narrow_cast<int32>(end - ptr)));
if (ptr == nullptr) {
break;
}
if (ptr != begin) {
uint32 prev;
next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev);
if (is_word_character(prev) || prev == '/' || prev == '<' || prev == '>') {
ptr++;
continue;
}
}
auto command_begin = ++ptr;
while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
ptr++;
}
auto command_end = ptr;
auto command_size = command_end - command_begin;
if (command_size < 1 || command_size > 64) {
continue;
}
if (ptr != end && *ptr == '@') {
auto mention_begin = ++ptr;
while (ptr != end && is_alpha_digit_or_underscore(*ptr)) {
ptr++;
}
auto mention_end = ptr;
auto mention_size = mention_end - mention_begin;
if (mention_size < 3 || mention_size > 32) {
continue;
}
command_end = ptr;
}
uint32 next = 0;
if (ptr != end) {
next_utf8_unsafe(ptr, &next);
}
if (is_word_character(next) || next == '/' || next == '<' || next == '>') {
continue;
}
result.emplace_back(command_begin - 1, command_end);
}
return result;
}
static bool is_hashtag_letter(uint32 c, UnicodeSimpleCategory &category) {
category = get_unicode_simple_category(c);
if (c == '_' || c == 0x200c) {
return true;
}
switch (category) {
case UnicodeSimpleCategory::DecimalNumber:
case UnicodeSimpleCategory::Letter:
return true;
default:
return false;
}
}
static vector<Slice> match_hashtags(Slice str) {
vector<Slice> result;
const unsigned char *begin = str.ubegin();
const unsigned char *end = str.uend();
const unsigned char *ptr = begin;
// '/(?<=^|[^\d_\pL\x{200c}])#([\d_\pL\x{200c}]{1,256})(?![\d_\pL\x{200c}]*#)/u'
// and at least one letter
UnicodeSimpleCategory category;
while (true) {
ptr = reinterpret_cast<const unsigned char *>(std::memchr(ptr, '#', narrow_cast<int32>(end - ptr)));
if (ptr == nullptr) {
break;
}
if (ptr != begin) {
uint32 prev;
next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev);
if (is_hashtag_letter(prev, category)) {
ptr++;
continue;
}
}
auto hashtag_begin = ++ptr;
size_t hashtag_size = 0;
const unsigned char *hashtag_end = nullptr;
bool was_letter = false;
while (ptr != end) {
uint32 code;
auto next_ptr = next_utf8_unsafe(ptr, &code);
if (!is_hashtag_letter(code, category)) {
break;
}
ptr = next_ptr;
if (hashtag_size == 255) {
hashtag_end = ptr;
}
if (hashtag_size != 256) {
was_letter |= category == UnicodeSimpleCategory::Letter;
hashtag_size++;
}
}
if (!hashtag_end) {
hashtag_end = ptr;
}
if (hashtag_size < 1) {
continue;
}
if (ptr != end && ptr[0] == '#') {
continue;
}
if (!was_letter) {
continue;
}
result.emplace_back(hashtag_begin - 1, hashtag_end);
}
return result;
}
static vector<Slice> match_cashtags(Slice str) {
vector<Slice> result;
const unsigned char *begin = str.ubegin();
const unsigned char *end = str.uend();
const unsigned char *ptr = begin;
// '/(?<=^|[^$\d_\pL\x{200c}])\$([A-Z]{3,8})(?![$\d_\pL\x{200c}])/u'
UnicodeSimpleCategory category;
while (true) {
ptr = reinterpret_cast<const unsigned char *>(std::memchr(ptr, '$', narrow_cast<int32>(end - ptr)));
if (ptr == nullptr) {
break;
}
if (ptr != begin) {
uint32 prev;
next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev);
if (is_hashtag_letter(prev, category) || prev == '$') {
ptr++;
continue;
}
}
auto cashtag_begin = ++ptr;
while (ptr != end && 'Z' >= *ptr && *ptr >= 'A') {
ptr++;
}
auto cashtag_end = ptr;
auto cashtag_size = cashtag_end - cashtag_begin;
if (cashtag_size < 3 || cashtag_size > 8) {
continue;
}
if (cashtag_end != end) {
uint32 code;
next_utf8_unsafe(ptr, &code);
if (is_hashtag_letter(code, category) || code == '$') {
continue;
}
}
result.emplace_back(cashtag_begin - 1, cashtag_end);
}
return result;
}
static vector<Slice> match_urls(Slice str) {
vector<Slice> result;
const unsigned char *begin = str.ubegin();
const unsigned char *end = str.uend();
const auto &is_protocol_symbol = [](uint32 c) {
if (c < 0x80) {
// do not allow dots in the protocol
return is_alpha_digit(c) || c == '+' || c == '-';
}
// add unicode letters and digits to later discard protocol as invalid
return get_unicode_simple_category(c) != UnicodeSimpleCategory::Separator;
};
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()) {
break;
}
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);
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);
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);
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);
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] == '/' || 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);
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);
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);
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;
}
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{
"ya", "gif", "wiki", "vid", "bing", "pic", "bold", "imdb", "coub", "like", "vote", "giff", "cap"};
return valid_usernames;
}
vector<Slice> find_mentions(Slice str) {
auto mentions = match_mentions(str);
mentions.erase(std::remove_if(mentions.begin(), mentions.end(),
[](Slice mention) {
mention.remove_prefix(1);
if (mention.size() >= 5) {
return false;
}
return get_valid_short_usernames().count(mention) == 0;
}),
mentions.end());
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<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 {
url = fix_url(url);
if (!url.empty()) {
result.emplace_back(url, false);
}
}
}
return result;
}
// sorts entities, removes intersecting and empty entities
static void fix_entities(vector<MessageEntity> &entities) {
if (entities.empty()) {
return;
}
std::sort(entities.begin(), entities.end());
int32 last_entity_end = 0;
size_t left_entities = 0;
for (size_t i = 0; i < entities.size(); i++) {
if (entities[i].length > 0 && 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());
}
vector<MessageEntity> find_entities(Slice text, bool skip_bot_commands, bool only_urls) {
vector<MessageEntity> entities;
if (!only_urls) {
auto mentions = find_mentions(text);
for (auto &mention : mentions) {
entities.emplace_back(MessageEntity::Type::Mention, narrow_cast<int32>(mention.begin() - text.begin()),
narrow_cast<int32>(mention.size()));
}
if (!skip_bot_commands) {
auto bot_commands = find_bot_commands(text);
for (auto &bot_command : bot_commands) {
entities.emplace_back(MessageEntity::Type::BotCommand, narrow_cast<int32>(bot_command.begin() - text.begin()),
narrow_cast<int32>(bot_command.size()));
}
}
auto hashtags = find_hashtags(text);
for (auto &hashtag : hashtags) {
entities.emplace_back(MessageEntity::Type::Hashtag, narrow_cast<int32>(hashtag.begin() - text.begin()),
narrow_cast<int32>(hashtag.size()));
}
auto cashtags = find_cashtags(text);
for (auto &cashtag : cashtags) {
entities.emplace_back(MessageEntity::Type::Cashtag, narrow_cast<int32>(cashtag.begin() - text.begin()),
narrow_cast<int32>(cashtag.size()));
}
// TODO find_phone_numbers
}
auto urls = find_urls(text);
for (auto &url : urls) {
// TODO better find messageEntityUrl
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;
}
fix_entities(entities);
// fix offsets to utf16 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);
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;
}
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:
return utf8_utf16_substr(text, entity.offset, entity.length).str();
case MessageEntity::Type::EmailAddress:
break;
case MessageEntity::Type::Bold:
break;
case MessageEntity::Type::Italic:
break;
case MessageEntity::Type::Code:
break;
case MessageEntity::Type::Pre:
break;
case MessageEntity::Type::PreCode:
break;
case MessageEntity::Type::TextUrl:
return entity.argument;
case MessageEntity::Type::MentionName:
break;
case MessageEntity::Type::Cashtag:
break;
case MessageEntity::Type::PhoneNumber:
break;
default:
UNREACHABLE();
}
}
return string();
}
static UserId get_link_user_id(Slice url) {
auto 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")) {
return UserId(to_integer<int32>(value));
}
}
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 (language_end < size && !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 utf16_entity_length = 0;
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_entity_length += 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 (utf16_entity_length > 0) {
switch (c) {
case '_':
entities.emplace_back(MessageEntity::Type::Italic, utf16_offset, utf16_entity_length);
break;
case '*':
entities.emplace_back(MessageEntity::Type::Bold, utf16_offset, utf16_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(utf16_offset, utf16_entity_length, user_id);
} else {
auto r_http_url = parse_url(url);
if (r_http_url.is_ok() && url.find('.') != string::npos) {
entities.emplace_back(MessageEntity::Type::TextUrl, utf16_offset, utf16_entity_length,
r_http_url.ok().get_url());
}
}
break;
}
case '`':
if (is_pre) {
if (language.empty()) {
entities.emplace_back(MessageEntity::Type::Pre, utf16_offset, utf16_entity_length);
} else {
entities.emplace_back(MessageEntity::Type::PreCode, utf16_offset, utf16_entity_length, language);
}
} else {
entities.emplace_back(MessageEntity::Type::Code, utf16_offset, utf16_entity_length);
}
break;
default:
UNREACHABLE();
}
utf16_offset += utf16_entity_length;
}
if (is_pre) {
i += 2;
}
}
text = result;
return entities;
}
static uint32 decode_html_entity(const string &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++;
}
string entity(text, pos + 1, end_pos - pos - 1);
if (entity == "lt") {
res = static_cast<uint32>('<');
} else if (entity == "gt") {
res = static_cast<uint32>('>');
} else if (entity == "amp") {
res = static_cast<uint32>('&');
} else if (entity == "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;
}
Result<vector<MessageEntity>> parse_html(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 == '&') {
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;
}
// we are at begin of the entity
size_t begin_pos = i++;
if (text[i] == '/') {
return Status::Error(400, PSLICE() << "Unexpected end tag at byte offset " << begin_pos);
}
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(text, begin_pos + 1, i - begin_pos - 1);
to_lower_inplace(tag_name);
if (tag_name != "em" && tag_name != "strong" && tag_name != "a" && tag_name != "b" && tag_name != "i" &&
tag_name != "pre" && tag_name != "code") {
return Status::Error(400,
PSLICE() << "Unsupported start tag \"" << tag_name << "\" at byte offset " << begin_pos);
}
string url;
// string language; TODO PreCode support
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++;
}
string attribute_name(text, attribute_begin_pos, i - attribute_begin_pos);
if (attribute_name.empty()) {
return Status::Error(400, PSLICE() << "Expected equal sign in declaration of attribute of 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 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 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.assign(text, token_begin_pos, i - token_begin_pos);
to_lower_inplace(attribute_value);
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 == "href") {
url = attribute_value;
}
}
i++;
int32 utf16_entity_length = 0;
size_t entity_begin_pos = result.size();
while (text[i] != 0 && text[i] != '<') {
auto cur_ch = static_cast<unsigned char>(text[i]);
if (cur_ch == '&') {
auto ch = decode_html_entity(text, i);
if (ch != 0) {
utf16_entity_length += 1 + (ch > 0xffff);
append_utf8_character(result, ch);
continue;
}
}
if (is_utf8_character_first_code_unit(cur_ch)) {
utf16_entity_length += 1 + (cur_ch >= 0xf0); // >= 4 bytes in symbol => surrogaite pair
}
result.push_back(text[i++]);
}
if (text[i] == 0) {
return Status::Error(400,
PSLICE() << "Can't found end tag corresponding to start tag at byte offset " << begin_pos);
}
auto end_tag_begin_pos = i++;
if (text[i] != '/') {
return Status::Error(400, PSLICE() << "Expected end tag at byte offset " << end_tag_begin_pos);
}
while (!is_space(text[i]) && text[i] != '>') {
i++;
}
string end_tag_name(text, end_tag_begin_pos + 2, i - end_tag_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 " << end_tag_begin_pos);
}
if (!end_tag_name.empty() && end_tag_name != tag_name) {
return Status::Error(400, PSLICE() << "Unmatched end tag at byte offset " << end_tag_begin_pos
<< ", expected \"</" << tag_name << ">\", found\"</" << end_tag_name << ">\"");
}
if (utf16_entity_length > 0) {
if (tag_name == "i" || tag_name == "em") {
entities.emplace_back(MessageEntity::Type::Italic, utf16_offset, utf16_entity_length);
} else if (tag_name == "b" || tag_name == "strong") {
entities.emplace_back(MessageEntity::Type::Bold, utf16_offset, utf16_entity_length);
} else if (tag_name == "a") {
if (url.empty()) {
url = result.substr(entity_begin_pos);
}
auto user_id = get_link_user_id(url);
if (user_id.is_valid()) {
entities.emplace_back(utf16_offset, utf16_entity_length, user_id);
} else {
auto r_http_url = parse_url(url);
if (r_http_url.is_ok() && url.find('.') != string::npos) {
entities.emplace_back(MessageEntity::Type::TextUrl, utf16_offset, utf16_entity_length,
r_http_url.ok().get_url());
}
}
} else if (tag_name == "pre") {
entities.emplace_back(MessageEntity::Type::Pre, utf16_offset, utf16_entity_length);
} else if (tag_name == "code") {
entities.emplace_back(MessageEntity::Type::Code, utf16_offset, utf16_entity_length);
}
utf16_offset += utf16_entity_length;
}
}
text = result;
return entities;
}
vector<tl_object_ptr<telegram_api::MessageEntity>> get_input_message_entities(const ContactsManager *contacts_manager,
const vector<MessageEntity> &entities) {
vector<tl_object_ptr<telegram_api::MessageEntity>> result;
for (auto &entity : entities) {
switch (entity.type) {
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:
continue;
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::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);
CHECK(input_user != nullptr);
result.push_back(make_tl_object<telegram_api::inputMessageEntityMentionName>(entity.offset, entity.length,
std::move(input_user)));
break;
}
default:
UNREACHABLE();
}
}
return result;
}
vector<tl_object_ptr<secret_api::MessageEntity>> get_input_secret_message_entities(
const vector<MessageEntity> &entities) {
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::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::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;
case MessageEntity::Type::PhoneNumber:
break;
default:
UNREACHABLE();
}
}
return result;
}
Result<vector<MessageEntity>> get_message_entities(const ContactsManager *contacts_manager,
const vector<tl_object_ptr<td_api::textEntity>> &input_entities) {
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:
case td_api::textEntityTypeHashtag::ID:
case td_api::textEntityTypeBotCommand::ID:
case td_api::textEntityTypeUrl::ID:
case td_api::textEntityTypeEmailAddress::ID:
case td_api::textEntityTypeCashtag::ID:
case td_api::textEntityTypePhoneNumber::ID:
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::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_http_url = parse_url(entity_text_url->url_);
if (r_http_url.is_error()) {
return Status::Error(400, PSTRING() << "Wrong message entity: " << r_http_url.error().message());
}
entities.emplace_back(MessageEntity::Type::TextUrl, entity->offset_, entity->length_,
r_http_url.ok().get_url());
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->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();
}
}
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::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::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: {
// TODO const telegram_api::messageEntityTextUrl *
auto entity_text_url = static_cast<telegram_api::messageEntityTextUrl *>(entity.get());
auto r_http_url = parse_url(entity_text_url->url_);
if (r_http_url.is_error()) {
LOG(ERROR) << "Wrong URL entity: \"" << entity_text_url->url_ << "\": " << r_http_url.error().message()
<< " from " << source;
continue;
}
entities.emplace_back(MessageEntity::Type::TextUrl, entity_text_url->offset_, entity_text_url->length_,
r_http_url.ok().get_url());
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->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 unaccessible " << 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::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::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_http_url = parse_url(entity_text_url->url_);
if (r_http_url.is_error()) {
LOG(WARNING) << "Wrong URL entity: \"" << entity_text_url->url_ << "\": " << r_http_url.error().message();
continue;
}
entities.emplace_back(MessageEntity::Type::TextUrl, entity_text_url->offset_, entity_text_url->length_,
r_http_url.ok().get_url());
break;
}
case secret_api::messageEntityMentionName::ID:
// skip all name mentions in secret chats
break;
default:
UNREACHABLE();
}
}
return 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");
}
fix_entities(entities);
bool in_entity = false;
bool has_non_space_in_entity = false;
size_t current_entity = 0;
int32 skipped_before_current_entity = 0;
size_t left_entities = 0; // will remove all entities containing spaces only
int32 utf16_offset = 0;
int32 utf16_skipped = 0;
size_t text_size = text.size();
size_t last_non_space_pos = text_size + 1;
int32 last_non_space_utf16_offset = 0;
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) {
if (in_entity) {
CHECK(current_entity < entities.size());
if (utf16_offset >= entities[current_entity].offset + entities[current_entity].length) {
if (utf16_offset != entities[current_entity].offset + entities[current_entity].length) {
CHECK(utf16_offset == entities[current_entity].offset + entities[current_entity].length + 1);
return Status::Error(16, PSLICE() << "Entity beginning at UTF-16 offset " << entities[current_entity].offset
<< " ends in a middle of a UTF-16 symbol at byte offset " << pos);
}
entities[current_entity].offset -= skipped_before_current_entity;
entities[current_entity].length -= utf16_skipped - skipped_before_current_entity;
in_entity = false;
if (has_non_space_in_entity) {
// TODO check entities for validness, for example, that mentions, hashtags, cashtags and URLs are valid
if (current_entity != left_entities) {
entities[left_entities] = std::move(entities[current_entity]);
}
left_entities++;
}
current_entity++;
}
}
if (!in_entity && 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(16, PSLICE() << "Entity begins in a middle of a UTF-16 symbol at byte offset " << pos);
}
in_entity = true;
has_non_space_in_entity = false;
skipped_before_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]);
if (c != '\n') {
has_non_space_in_entity = true;
last_non_space_pos = result.size();
last_non_space_utf16_offset = utf16_offset - utf16_skipped;
}
break;
}
}
entities.erase(entities.begin() + left_entities, entities.end());
if (last_non_space_pos == text_size + 1) {
if (allow_empty) {
text.clear();
entities.clear();
return Status::OK();
}
return Status::Error(3, "Message must be non-empty");
}
if (for_draft) {
text = std::move(result);
} else {
// rtrim
result.resize(last_non_space_pos);
for (auto &entity : entities) {
if (entity.offset + entity.length > last_non_space_utf16_offset) {
entity.length = last_non_space_utf16_offset - entity.offset;
CHECK(entity.length > 0);
}
}
// ltrim
size_t first_non_spaces_pos = 0;
size_t first_entity_begin_pos = entities.empty() ? result.size() : entities[0].offset;
while (first_non_spaces_pos < first_entity_begin_pos &&
(result[first_non_spaces_pos] == ' ' || result[first_non_spaces_pos] == '\n')) {
first_non_spaces_pos++;
}
if (first_non_spaces_pos > 0) {
int32 offset = narrow_cast<int32>(first_non_spaces_pos);
text = result.substr(first_non_spaces_pos);
for (auto &entity : entities) {
entity.offset -= offset;
CHECK(entity.offset >= 0);
}
} else {
text = std::move(result);
}
}
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);
while (!entities.empty() && entities.back().offset + entities.back().length > 8192) {
entities.pop_back();
}
}
if (!skip_new_entities) {
entities = merge_entities(std::move(entities), find_entities(text, skip_bot_commands));
}
for (auto it = entities.begin(); it != entities.end(); ++it) {
CHECK(it->length > 0);
if (it + 1 != entities.end()) {
CHECK(it->offset + it->length <= (it + 1)->offset);
}
}
// TODO MAX_MESSAGE_LENGTH and MAX_CAPTION_LENGTH
return Status::OK();
}
} // namespace td