// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019 // // 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/format.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 = static_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, "match_mentions"); 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, "match_mentions 2"); } 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 = static_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, "match_bot_commands"); 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, "match_bot_commands 2"); } 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 = static_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, "match_hashtags"); 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, "match_hashtags 2"); 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 = static_cast<const unsigned char *>(std::memchr(ptr, '$', narrow_cast<int32>(end - ptr))); if (ptr == nullptr) { break; } if (ptr != begin) { uint32 prev; next_utf8_unsafe(prev_utf8_unsafe(ptr), &prev, "match_cashtags"); if (is_hashtag_letter(prev, category) || prev == '$') { 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, "match_cashtags 2"); 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, "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; } 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"}; 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 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; } // 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, "match_urls 8"); 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, "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::Code: break; case MessageEntity::Type::Pre: break; case MessageEntity::Type::PreCode: break; case MessageEntity::Type::TextUrl: if (begins_with(entity.argument, "tg:")) { continue; } 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) { 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 (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_url = check_url(url); if (r_url.is_ok()) { entities.emplace_back(MessageEntity::Type::TextUrl, utf16_offset, utf16_entity_length, r_url.move_as_ok()); } } 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_url = check_url(url); if (r_url.is_ok()) { entities.emplace_back(MessageEntity::Type::TextUrl, utf16_offset, utf16_entity_length, r_url.move_as_ok()); } } } 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; } } 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) { 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); LOG_CHECK(input_user != nullptr) << source; 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<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) { 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, 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_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->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_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::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_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; } 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 have_space_in_entity = false; bool have_non_whitespace_in_entity = false; size_t current_entity = 0; int32 skipped_before_current_entity = 0; size_t left_entities = 0; // will remove entities containing whitespaces only int32 utf16_offset = 0; int32 utf16_skipped = 0; size_t text_size = text.size(); size_t last_non_whitespace_pos = text_size + 1; int32 last_non_whitespace_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; auto entity_type = entities[current_entity].type; auto have_hidden_data = entity_type == MessageEntity::Type::TextUrl || entity_type == MessageEntity::Type::MentionName; if (have_non_whitespace_in_entity || (have_space_in_entity && have_hidden_data)) { // 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; have_space_in_entity = false; have_non_whitespace_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: have_space_in_entity = true; 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') { have_non_whitespace_in_entity = true; last_non_whitespace_pos = result.size(); last_non_whitespace_utf16_offset = utf16_offset - utf16_skipped; } break; } } entities.erase(entities.begin() + left_entities, entities.end()); if (last_non_whitespace_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_whitespace_pos); while (!entities.empty() && entities.back().offset >= last_non_whitespace_utf16_offset) { CHECK(entities.back().type == MessageEntity::Type::TextUrl || entities.back().type == MessageEntity::Type::MentionName); entities.pop_back(); } for (auto &entity : entities) { if (entity.offset + entity.length > last_non_whitespace_utf16_offset) { entity.length = last_non_whitespace_utf16_offset - entity.offset; CHECK(entity.length > 0); } } // 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); } } 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(); } 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, const char *source) { auto entities = get_message_entities(contacts_manager, std::move(server_entities), source); auto status = fix_formatted_text(message_text, entities, true, skip_new_entities, true, false); if (status.is_error()) { if (send_date == 0 || send_date > 1497000000) { // approximate fix date LOG(ERROR) << "Receive error " << status << " while parsing message from " << source << " with content \"" << message_text << "\" sent at " << send_date << " with entities " << format::as_array(entities); } if (!clean_input_string(message_text)) { message_text.clear(); } entities.clear(); } 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 (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 !contacts_manager->is_user_bot(user_id); } case DialogType::Chat: case DialogType::Channel: case DialogType::None: return false; default: UNREACHABLE(); return false; } } } // namespace td