503 lines
14 KiB
PHP
503 lines
14 KiB
PHP
<?php
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/**
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* @file src/Model/Term.php
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*/
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namespace Friendica\Model;
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use Friendica\Core\Cache;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\Database\DBA;
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use Friendica\Util\Strings;
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/**
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* Class Term
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*
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* This Model class handles term table interactions.
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* This tables stores relevant terms related to posts, photos and searches, like hashtags, mentions and
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* user-applied categories.
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*
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* @package Friendica\Model
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*/
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class Term
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{
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const UNKNOWN = 0;
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const HASHTAG = 1;
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const MENTION = 2;
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const CATEGORY = 3;
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const PCATEGORY = 4;
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const FILE = 5;
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const SAVEDSEARCH = 6;
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const CONVERSATION = 7;
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/**
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* An implicit mention is a mention in a comment body that is redundant with the threading information.
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*/
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const IMPLICIT_MENTION = 8;
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/**
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* An exclusive mention transfers the ownership of the post to the target account, usually a forum.
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*/
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const EXCLUSIVE_MENTION = 9;
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const TAG_CHARACTER = [
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self::HASHTAG => '#',
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self::MENTION => '@',
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self::IMPLICIT_MENTION => '%',
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self::EXCLUSIVE_MENTION => '!',
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];
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const OBJECT_TYPE_POST = 1;
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const OBJECT_TYPE_PHOTO = 2;
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/**
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* Returns a list of the most frequent global hashtags over the given period
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*
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* @param int $period Period in hours to consider posts
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* @return array
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* @throws \Exception
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*/
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public static function getGlobalTrendingHashtags(int $period, $limit = 10)
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{
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$tags = Cache::get('global_trending_tags');
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if (!$tags) {
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$tagsStmt = DBA::p("SELECT t.`term`, COUNT(*) AS `score`
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FROM `term` t
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JOIN `item` i ON i.`id` = t.`oid` AND i.`uid` = t.`uid`
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JOIN `thread` ON `thread`.`iid` = i.`id`
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WHERE `thread`.`visible`
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AND NOT `thread`.`deleted`
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AND NOT `thread`.`moderated`
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AND NOT `thread`.`private`
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AND t.`uid` = 0
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AND t.`otype` = ?
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AND t.`type` = ?
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AND t.`term` != ''
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AND i.`received` > DATE_SUB(NOW(), INTERVAL ? HOUR)
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GROUP BY `term`
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ORDER BY `score` DESC
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LIMIT ?",
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Term::OBJECT_TYPE_POST,
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Term::HASHTAG,
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$period,
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$limit
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);
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if (DBA::isResult($tagsStmt)) {
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$tags = DBA::toArray($tagsStmt);
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Cache::set('global_trending_tags', $tags, Cache::HOUR);
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}
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}
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return $tags ?: [];
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}
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/**
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* Returns a list of the most frequent local hashtags over the given period
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*
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* @param int $period Period in hours to consider posts
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* @return array
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* @throws \Exception
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*/
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public static function getLocalTrendingHashtags(int $period, $limit = 10)
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{
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$tags = Cache::get('local_trending_tags');
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if (!$tags) {
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$tagsStmt = DBA::p("SELECT t.`term`, COUNT(*) AS `score`
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FROM `term` t
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JOIN `item` i ON i.`id` = t.`oid` AND i.`uid` = t.`uid`
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JOIN `thread` ON `thread`.`iid` = i.`id`
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JOIN `user` ON `user`.`uid` = `thread`.`uid` AND NOT `user`.`hidewall`
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WHERE `thread`.`visible`
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AND NOT `thread`.`deleted`
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AND NOT `thread`.`moderated`
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AND NOT `thread`.`private`
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AND `thread`.`wall`
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AND `thread`.`origin`
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AND t.`otype` = ?
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AND t.`type` = ?
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AND t.`term` != ''
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AND i.`received` > DATE_SUB(NOW(), INTERVAL ? HOUR)
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GROUP BY `term`
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ORDER BY `score` DESC
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LIMIT ?",
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Term::OBJECT_TYPE_POST,
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Term::HASHTAG,
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$period,
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$limit
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);
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if (DBA::isResult($tagsStmt)) {
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$tags = DBA::toArray($tagsStmt);
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Cache::set('local_trending_tags', $tags, Cache::HOUR);
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}
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}
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return $tags ?: [];
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}
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/**
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* Generates the legacy item.tag field comma-separated BBCode string from an item ID.
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* Includes only hashtags, implicit and explicit mentions.
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*
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* @param int $item_id
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* @return string
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* @throws \Exception
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*/
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public static function tagTextFromItemId($item_id)
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{
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$tag_list = [];
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$tags = self::tagArrayFromItemId($item_id, [self::HASHTAG, self::MENTION, self::IMPLICIT_MENTION]);
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foreach ($tags as $tag) {
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$tag_list[] = self::TAG_CHARACTER[$tag['type']] . '[url=' . $tag['url'] . ']' . $tag['term'] . '[/url]';
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}
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return implode(',', $tag_list);
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}
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/**
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* Retrieves the terms from the provided type(s) associated with the provided item ID.
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*
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* @param int $item_id
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* @param int|array $type
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* @return array
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* @throws \Exception
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*/
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public static function tagArrayFromItemId($item_id, $type = [self::HASHTAG, self::MENTION])
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{
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$condition = ['otype' => self::OBJECT_TYPE_POST, 'oid' => $item_id, 'type' => $type];
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$tags = DBA::select('term', ['type', 'term', 'url'], $condition);
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if (!DBA::isResult($tags)) {
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return [];
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}
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return DBA::toArray($tags);
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}
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/**
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* Generates the legacy item.file field string from an item ID.
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* Includes only file and category terms.
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*
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* @param int $item_id
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* @return string
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* @throws \Exception
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*/
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public static function fileTextFromItemId($item_id)
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{
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$file_text = '';
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$tags = self::tagArrayFromItemId($item_id, [self::FILE, self::CATEGORY]);
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foreach ($tags as $tag) {
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if ($tag['type'] == self::CATEGORY) {
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$file_text .= '<' . $tag['term'] . '>';
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} else {
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$file_text .= '[' . $tag['term'] . ']';
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}
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}
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return $file_text;
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}
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/**
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* Inserts new terms for the provided item ID based on the legacy item.tag field BBCode content.
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* Deletes all previous tag terms for the same item ID.
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* Sets both the item.mention and thread.mentions field flags if a mention concerning the item UID is found.
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*
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* @param int $item_id
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* @param string $tag_str
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function insertFromTagFieldByItemId($item_id, $tag_str)
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{
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$profile_base = System::baseUrl();
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$profile_data = parse_url($profile_base);
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$profile_path = defaults($profile_data, 'path', '');
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$profile_base_friendica = $profile_data['host'] . $profile_path . '/profile/';
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$profile_base_diaspora = $profile_data['host'] . $profile_path . '/u/';
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$fields = ['guid', 'uid', 'id', 'edited', 'deleted', 'created', 'received', 'title', 'body', 'parent'];
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$item = Item::selectFirst($fields, ['id' => $item_id]);
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if (!DBA::isResult($item)) {
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return;
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}
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$item['tag'] = $tag_str;
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// Clean up all tags
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self::deleteByItemId($item_id);
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if ($item['deleted']) {
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return;
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}
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$taglist = explode(',', $item['tag']);
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$tags_string = '';
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foreach ($taglist as $tag) {
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if (Strings::startsWith($tag, self::TAG_CHARACTER)) {
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$tags_string .= ' ' . trim($tag);
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} else {
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$tags_string .= ' #' . trim($tag);
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}
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}
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$data = ' ' . $item['title'] . ' ' . $item['body'] . ' ' . $tags_string . ' ';
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// ignore anything in a code block
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$data = preg_replace('/\[code\](.*?)\[\/code\]/sm', '', $data);
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$tags = [];
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$pattern = '/\W\#([^\[].*?)[\s\'".,:;\?!\[\]\/]/ism';
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if (preg_match_all($pattern, $data, $matches)) {
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foreach ($matches[1] as $match) {
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$tags['#' . $match] = '';
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}
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}
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$pattern = '/\W([\#@!%])\[url\=(.*?)\](.*?)\[\/url\]/ism';
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if (preg_match_all($pattern, $data, $matches, PREG_SET_ORDER)) {
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foreach ($matches as $match) {
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if (in_array($match[1], [
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self::TAG_CHARACTER[self::MENTION],
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self::TAG_CHARACTER[self::IMPLICIT_MENTION],
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self::TAG_CHARACTER[self::EXCLUSIVE_MENTION]
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])) {
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$contact = Contact::getDetailsByURL($match[2], 0);
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if (!empty($contact['addr'])) {
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$match[3] = $contact['addr'];
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}
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if (!empty($contact['url'])) {
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$match[2] = $contact['url'];
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}
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}
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$tags[$match[2]] = $match[1] . trim($match[3], ',.:;[]/\"?!');
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}
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}
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foreach ($tags as $link => $tag) {
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if (self::isType($tag, self::HASHTAG)) {
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// try to ignore #039 or #1 or anything like that
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if (ctype_digit(substr(trim($tag), 1))) {
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continue;
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}
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// try to ignore html hex escapes, e.g. #x2317
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if ((substr(trim($tag), 1, 1) == 'x' || substr(trim($tag), 1, 1) == 'X') && ctype_digit(substr(trim($tag), 2))) {
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continue;
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}
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$type = self::HASHTAG;
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$term = substr($tag, 1);
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$link = '';
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} elseif (self::isType($tag, self::MENTION, self::EXCLUSIVE_MENTION, self::IMPLICIT_MENTION)) {
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if (self::isType($tag, self::MENTION, self::EXCLUSIVE_MENTION)) {
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$type = self::MENTION;
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} else {
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$type = self::IMPLICIT_MENTION;
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}
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$contact = Contact::getDetailsByURL($link, 0);
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if (!empty($contact['name'])) {
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$term = $contact['name'];
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} else {
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$term = substr($tag, 1);
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}
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} else { // This shouldn't happen
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$type = self::HASHTAG;
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$term = $tag;
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$link = '';
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Logger::notice('Unknown term type', ['tag' => $tag]);
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}
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if (DBA::exists('term', ['uid' => $item['uid'], 'otype' => self::OBJECT_TYPE_POST, 'oid' => $item_id, 'term' => $term, 'type' => $type])) {
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continue;
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}
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if ($item['uid'] == 0) {
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$global = true;
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DBA::update('term', ['global' => true], ['otype' => self::OBJECT_TYPE_POST, 'guid' => $item['guid']]);
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} else {
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$global = DBA::exists('term', ['uid' => 0, 'otype' => self::OBJECT_TYPE_POST, 'guid' => $item['guid']]);
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}
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DBA::insert('term', [
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'uid' => $item['uid'],
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'oid' => $item_id,
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'otype' => self::OBJECT_TYPE_POST,
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'type' => $type,
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'term' => $term,
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'url' => $link,
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'guid' => $item['guid'],
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'created' => $item['created'],
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'received' => $item['received'],
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'global' => $global
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]);
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// Search for mentions
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if (self::isType($tag, self::MENTION, self::EXCLUSIVE_MENTION)
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&& (
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strpos($link, $profile_base_friendica) !== false
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|| strpos($link, $profile_base_diaspora) !== false
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)
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) {
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$users_stmt = DBA::p("SELECT `uid` FROM `contact` WHERE self AND (`url` = ? OR `nurl` = ?)", $link, $link);
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$users = DBA::toArray($users_stmt);
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foreach ($users AS $user) {
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if ($user['uid'] == $item['uid']) {
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/// @todo This function is called from Item::update - so we mustn't call that function here
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DBA::update('item', ['mention' => true], ['id' => $item_id]);
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DBA::update('thread', ['mention' => true], ['iid' => $item['parent']]);
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}
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}
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}
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}
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}
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/**
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* Inserts new terms for the provided item ID based on the legacy item.file field BBCode content.
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* Deletes all previous file terms for the same item ID.
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*
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* @param integer $item_id item id
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* @param $files
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* @return void
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* @throws \Exception
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*/
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public static function insertFromFileFieldByItemId($item_id, $files)
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{
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$message = Item::selectFirst(['uid', 'deleted'], ['id' => $item_id]);
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if (!DBA::isResult($message)) {
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return;
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}
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// Clean up all tags
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DBA::delete('term', ['otype' => self::OBJECT_TYPE_POST, 'oid' => $item_id, 'type' => [self::FILE, self::CATEGORY]]);
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if ($message["deleted"]) {
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return;
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}
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$message['file'] = $files;
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if (preg_match_all("/\[(.*?)\]/ism", $message["file"], $files)) {
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foreach ($files[1] as $file) {
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DBA::insert('term', [
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'uid' => $message["uid"],
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'oid' => $item_id,
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'otype' => self::OBJECT_TYPE_POST,
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'type' => self::FILE,
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'term' => $file
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]);
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}
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}
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if (preg_match_all("/\<(.*?)\>/ism", $message["file"], $files)) {
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foreach ($files[1] as $file) {
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DBA::insert('term', [
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'uid' => $message["uid"],
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'oid' => $item_id,
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'otype' => self::OBJECT_TYPE_POST,
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'type' => self::CATEGORY,
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'term' => $file
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]);
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}
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}
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}
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/**
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* Sorts an item's tags into mentions, hashtags and other tags. Generate personalized URLs by user and modify the
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* provided item's body with them.
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*
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* @param array $item
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* @return array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function populateTagsFromItem(&$item)
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{
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$return = [
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'tags' => [],
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'hashtags' => [],
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'mentions' => [],
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'implicit_mentions' => [],
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];
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$searchpath = System::baseUrl() . "/search?tag=";
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$taglist = DBA::select(
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'term',
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['type', 'term', 'url'],
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['otype' => self::OBJECT_TYPE_POST, 'oid' => $item['id'], 'type' => [self::HASHTAG, self::MENTION, self::IMPLICIT_MENTION]],
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['order' => ['tid']]
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);
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while ($tag = DBA::fetch($taglist)) {
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if ($tag['url'] == '') {
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$tag['url'] = $searchpath . rawurlencode($tag['term']);
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}
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$orig_tag = $tag['url'];
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$prefix = self::TAG_CHARACTER[$tag['type']];
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switch($tag['type']) {
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case self::HASHTAG:
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if ($orig_tag != $tag['url']) {
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$item['body'] = str_replace($orig_tag, $tag['url'], $item['body']);
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}
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$return['hashtags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank">' . $tag['term'] . '</a>';
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$return['tags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank">' . $tag['term'] . '</a>';
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break;
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case self::MENTION:
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$tag['url'] = Contact::magicLink($tag['url']);
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$return['mentions'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank">' . $tag['term'] . '</a>';
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$return['tags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank">' . $tag['term'] . '</a>';
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break;
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case self::IMPLICIT_MENTION:
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$return['implicit_mentions'][] = $prefix . $tag['term'];
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break;
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}
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}
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DBA::close($taglist);
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return $return;
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}
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/**
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* Delete tags of the specific type(s) from an item
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*
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* @param int $item_id
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* @param int|array $type
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* @throws \Exception
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*/
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public static function deleteByItemId($item_id, $type = [self::HASHTAG, self::MENTION, self::IMPLICIT_MENTION])
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{
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if (empty($item_id)) {
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return;
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}
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// Clean up all tags
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DBA::delete('term', ['otype' => self::OBJECT_TYPE_POST, 'oid' => $item_id, 'type' => $type]);
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}
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/**
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* Check if the provided tag is of one of the provided term types.
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*
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* @param string $tag
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* @param int ...$types
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* @return bool
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*/
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public static function isType($tag, ...$types)
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{
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$tag_chars = [];
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foreach ($types as $type) {
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if (array_key_exists($type, self::TAG_CHARACTER)) {
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$tag_chars[] = self::TAG_CHARACTER[$type];
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}
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}
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return Strings::startsWith($tag, $tag_chars);
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}
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}
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