+ }
+
+ /**
+ * Create implicit mentions for a given post
+ *
+ * @param integer $uri_id
+ * @param integer $parent_uri_id
+ */
+ public static function createImplicitMentions(int $uri_id, int $parent_uri_id)
+ {
+ // Always mention the direct parent author
+ $parent = Item::selectFirst(['author-link', 'author-name'], ['uri-id' => $parent_uri_id]);
+ self::store($uri_id, self::IMPLICIT_MENTION, $parent['author-name'], $parent['author-link']);
+
+ if (DI::config()->get('system', 'disable_implicit_mentions')) {
+ return;
+ }
+
+ $tags = DBA::select('tag-view', ['name', 'url'], ['uri-id' => $parent_uri_id]);
+ while ($tag = DBA::fetch($tags)) {
+ self::store($uri_id, self::IMPLICIT_MENTION, $tag['name'], $tag['url']);
+ }
+ DBA::close($tags);
+ }
+
+ /**
+ * Retrieves the terms from the provided type(s) associated with the provided item ID.
+ *
+ * @param int $item_id
+ * @param int|array $type
+ * @return array
+ * @throws \Exception
+ */
+ public static function getByURIId(int $uri_id, array $type = [self::HASHTAG, self::MENTION, self::IMPLICIT_MENTION, self::EXCLUSIVE_MENTION])
+ {
+ $condition = ['uri-id' => $uri_id, 'type' => $type];
+ return DBA::selectToArray('tag-view', ['type', 'name', 'url'], $condition);
+ }
+
+ /**
+ * Return a string with all tags and mentions
+ *
+ * @param integer $uri_id
+ * @param array $type
+ * @return string tags and mentions
+ * @throws \Exception
+ */
+ public static function getCSVByURIId(int $uri_id, array $type = [self::HASHTAG, self::MENTION, self::IMPLICIT_MENTION, self::EXCLUSIVE_MENTION])
+ {
+ $tag_list = [];
+ $tags = self::getByURIId($uri_id, $type);
+ foreach ($tags as $tag) {
+ $tag_list[] = self::TAG_CHARACTER[$tag['type']] . '[url=' . $tag['url'] . ']' . $tag['name'] . '[/url]';
+ }
+
+ return implode(',', $tag_list);
+ }
+
+ /**
+ * Sorts an item's tags into mentions, hashtags and other tags. Generate personalized URLs by user and modify the
+ * provided item's body with them.
+ *
+ * @param array $item
+ * @return array
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ * @throws \ImagickException
+ */
+ public static function populateFromItem(&$item)
+ {
+ $return = [
+ 'tags' => [],
+ 'hashtags' => [],
+ 'mentions' => [],
+ 'implicit_mentions' => [],
+ ];
+
+ $searchpath = DI::baseUrl() . "/search?tag=";
+
+ $taglist = DBA::select('tag-view', ['type', 'name', 'url'],
+ ['uri-id' => $item['uri-id'], 'type' => [self::HASHTAG, self::MENTION, self::EXCLUSIVE_MENTION, self::IMPLICIT_MENTION]]);
+ while ($tag = DBA::fetch($taglist)) {
+ if ($tag['url'] == '') {
+ $tag['url'] = $searchpath . rawurlencode($tag['name']);
+ }
+
+ $orig_tag = $tag['url'];
+
+ $prefix = self::TAG_CHARACTER[$tag['type']];
+ switch($tag['type']) {
+ case self::HASHTAG:
+ if ($orig_tag != $tag['url']) {
+ $item['body'] = str_replace($orig_tag, $tag['url'], $item['body']);
+ }
+
+ $return['hashtags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank" rel="noopener noreferrer">' . htmlspecialchars($tag['name']) . '</a>';
+ $return['tags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank" rel="noopener noreferrer">' . htmlspecialchars($tag['name']) . '</a>';
+ break;
+ case self::MENTION:
+ case self::EXCLUSIVE_MENTION:
+ $tag['url'] = Contact::magicLink($tag['url']);
+ $return['mentions'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank" rel="noopener noreferrer">' . htmlspecialchars($tag['name']) . '</a>';
+ $return['tags'][] = $prefix . '<a href="' . $tag['url'] . '" target="_blank" rel="noopener noreferrer">' . htmlspecialchars($tag['name']) . '</a>';
+ break;
+ case self::IMPLICIT_MENTION:
+ $return['implicit_mentions'][] = $prefix . $tag['name'];
+ break;
+ }
+ }
+ DBA::close($taglist);
+
+ return $return;
+ }
+
+ /**
+ * Counts posts for given tag
+ *
+ * @param string $search
+ * @param integer $uid
+ * @return integer number of posts
+ */
+ public static function countByTag(string $search, int $uid = 0)
+ {
+ $condition = ["`name` = ? AND (NOT `private` OR (`private` AND `uid` = ?))", $search, $uid];
+ $params = ['group_by' => ['uri-id']];
+
+ return DBA::count('tag-search-view', $condition, $params);
+ }
+
+ /**
+ * Search posts for given tag
+ *
+ * @param string $search
+ * @param integer $uid
+ * @param integer $start
+ * @param integer $limit
+ * @param integer $last_uriid
+ * @return array with URI-ID
+ */
+ public static function getURIIdListByTag(string $search, int $uid = 0, int $start = 0, int $limit = 100, int $last_uriid = 0)
+ {
+ $condition = ["`name` = ? AND (NOT `private` OR (`private` AND `uid` = ?))", $search, $uid];
+
+ if (!empty($last_uriid)) {
+ $condition = DBA::mergeConditions($condition, ["`uri-id` < ?", $last_uriid]);
+ }
+
+ $params = [
+ 'order' => ['uri-id' => true],
+ 'group_by' => ['uri-id'],
+ 'limit' => [$start, $limit]
+ ];
+
+ $tags = DBA::select('tag-search-view', ['uri-id'], $condition, $params);
+
+ $uriids = [];
+ while ($tag = DBA::fetch($tags)) {
+ $uriids[] = $tag['uri-id'];
+ }
+ DBA::close($tags);
+
+ return $uriids;
+ }
+
+ /**
+ * Returns a list of the most frequent global hashtags over the given period
+ *
+ * @param int $period Period in hours to consider posts
+ * @param int $limit Number of returned tags
+ * @return array
+ * @throws \Exception
+ */
+ public static function getGlobalTrendingHashtags(int $period, $limit = 10)
+ {
+ $tags = DI::cache()->get('global_trending_tags-' . $period . '-' . $limit);
+ if (!empty($tags)) {
+ return $tags;
+ } else {
+ return self::setGlobalTrendingHashtags($period, $limit);
+ }
+ }
+
+ /**
+ * Creates a list of the most frequent global hashtags over the given period
+ *
+ * @param int $period Period in hours to consider posts
+ * @param int $limit Number of returned tags
+ * @return array
+ * @throws \Exception
+ */
+ public static function setGlobalTrendingHashtags(int $period, $limit = 10)
+ {
+ $tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`
+ FROM `tag-search-view`
+ WHERE `private` = ? AND `uid` = ? AND `received` > DATE_SUB(NOW(), INTERVAL ? HOUR)
+ GROUP BY `term` ORDER BY `score` DESC LIMIT ?",
+ Item::PUBLIC, 0, $period, $limit);
+
+ if (DBA::isResult($tagsStmt)) {
+ $tags = DBA::toArray($tagsStmt);
+ DI::cache()->set('global_trending_tags-' . $period . '-' . $limit, $tags, Duration::DAY);
+ return $tags;
+ }
+
+ return [];
+ }
+
+ /**
+ * Returns a list of the most frequent local hashtags over the given period
+ *
+ * @param int $period Period in hours to consider posts
+ * @param int $limit Number of returned tags
+ * @return array
+ * @throws \Exception
+ */
+ public static function getLocalTrendingHashtags(int $period, $limit = 10)
+ {
+ $tags = DI::cache()->get('local_trending_tags-' . $period . '-' . $limit);
+ if (!empty($tags)) {
+ return $tags;
+ } else {
+ return self::setLocalTrendingHashtags($period, $limit);
+ }
+ }
+
+ /**
+ * Returns a list of the most frequent local hashtags over the given period
+ *
+ * @param int $period Period in hours to consider posts
+ * @param int $limit Number of returned tags
+ * @return array
+ * @throws \Exception
+ */
+ public static function setLocalTrendingHashtags(int $period, $limit = 10)
+ {
+ $tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`
+ FROM `tag-search-view`
+ WHERE `private` = ? AND `wall` AND `origin` AND `received` > DATE_SUB(NOW(), INTERVAL ? HOUR)
+ GROUP BY `term` ORDER BY `score` DESC LIMIT ?",
+ Item::PUBLIC, $period, $limit);
+
+ if (DBA::isResult($tagsStmt)) {
+ $tags = DBA::toArray($tagsStmt);
+ DI::cache()->set('local_trending_tags-' . $period . '-' . $limit, $tags, Duration::DAY);
+ return $tags;
+ }
+
+ return [];
+ }
+
+ /**
+ * Check if the provided tag is of one of the provided term types.
+ *
+ * @param string $tag
+ * @param int ...$types
+ * @return bool
+ */
+ public static function isType($tag, ...$types)
+ {
+ $tag_chars = [];
+ foreach ($types as $type) {
+ if (array_key_exists($type, self::TAG_CHARACTER)) {
+ $tag_chars[] = self::TAG_CHARACTER[$type];
+ }
+ }
+
+ return Strings::startsWithChars($tag, $tag_chars);
+ }
+
+ /**
+ * Fetch user who subscribed to the given tag
+ *
+ * @param string $tag
+ * @return array User list
+ */
+ private static function getUIDListByTag(string $tag)
+ {
+ $uids = [];
+ $searches = DBA::select('search', ['uid'], ['term' => $tag]);
+ while ($search = DBA::fetch($searches)) {
+ $uids[] = $search['uid'];
+ }
+ DBA::close($searches);
+
+ return $uids;
+ }
+
+ /**
+ * Fetch user who subscribed to the tags of the given item
+ *
+ * @param integer $uri_id
+ * @return array User list
+ */
+ public static function getUIDListByURIId(int $uri_id)
+ {
+ $uids = [];
+ $tags = self::getByURIId($uri_id, [self::HASHTAG]);
+
+ foreach ($tags as $tag) {
+ $uids = array_merge($uids, self::getUIDListByTag(self::TAG_CHARACTER[self::HASHTAG] . $tag['name']));
+ }