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@levlam @arseny30
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//
// 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 find 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: {
auto entity_text_url = static_cast<const telegram_api::messageEntityTextUrl *>(entity.get());
auto r_url = check_url(entity_text_url->url_);
if (r_url.is_error()) {
LOG(ERROR) << "Wrong URL entity: \"" << entity_text_url->url_ << "\": " << r_url.error().message() << " from "
<< source;
continue;
}
entities.emplace_back(MessageEntity::Type::TextUrl, entity_text_url->offset_, entity_text_url->length_,
r_url.move_as_ok());
break;
}
case telegram_api::messageEntityMentionName::ID: {
auto entity_mention_name = static_cast<const telegram_api::messageEntityMentionName *>(entity.get());
UserId user_id(entity_mention_name->user_id_);
if (!user_id.is_valid()) {
LOG(ERROR) << "Receive invalid " << user_id << " in MentionName from " << source;
continue;
}
if (contacts_manager == nullptr || !contacts_manager->have_user(user_id)) {
LOG(ERROR) << "Receive unknown " << user_id << " in MentionName from " << source;
continue;
}
if (!contacts_manager->have_input_user(user_id)) {
LOG(ERROR) << "Receive inaccessible " << user_id << " in MentionName from " << source;
continue;
}
entities.emplace_back(entity_mention_name->offset_, entity_mention_name->length_, user_id);
break;
}
default:
UNREACHABLE();
}
}
return entities;
}
vector<MessageEntity> get_message_entities(vector<tl_object_ptr<secret_api::MessageEntity>> &&secret_entities) {
vector<MessageEntity> entities;
entities.reserve(secret_entities.size());
for (auto &entity : secret_entities) {
switch (entity->get_id()) {
case secret_api::messageEntityUnknown::ID:
break;
case secret_api::messageEntityMention::ID:
// skip, will find it ourselves
break;
case secret_api::messageEntityHashtag::ID:
// skip, will find it ourselves
break;
case secret_api::messageEntityCashtag::ID:
// skip, will find it ourselves
break;
case secret_api::messageEntityPhone::ID:
// skip, will find it ourselves
break;
case secret_api::messageEntityBotCommand::ID:
// skip all bot commands in secret chats
break;
case secret_api::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);
}
}
LOG_CHECK(check_utf8(text)) << text;
if (!allow_empty && is_empty_string(text)) {
return Status::Error(3, "Message must be non-empty");
}
constexpr size_t LENGTH_LIMIT = 35000; // server side limit
if (text.size() > LENGTH_LIMIT) {
size_t new_size = LENGTH_LIMIT;
while (!is_utf8_character_first_code_unit(text[new_size])) {
new_size--;
}
text.resize(new_size);
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
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