forked from GNUsocial/gnu-social
90 lines
3.0 KiB
PHP
90 lines
3.0 KiB
PHP
<?php
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// {{{ License
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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// }}}
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namespace Component\Tag;
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use App\Core\Cache;
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use App\Core\DB\DB;
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use App\Core\Event;
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use App\Core\Modules\Component;
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use App\Core\Router\Router;
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use App\Entity\Note;
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use App\Entity\NoteTag;
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use App\Util\Formatting;
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use App\Util\HTML;
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/**
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* Component responsible for extracting tags from posted notes, as well as normalizing them
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*
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* @author Hugo Sales <hugo@hsal.es>
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* @copyright 2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class Tag extends Component
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{
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const MAX_TAG_LENGTH = 64;
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const TAG_REGEX = '/(^|\\s)(#[\\pL\\pN_\\-\\.]{1,64})/u'; // Brion Vibber 2011-02-23 v2:classes/Notice.php:367 function saveTags
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const TAG_SLUG_REGEX = '[A-Za-z0-9]{1,64}';
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public function onAddRoute($r): bool
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{
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$r->connect('tag', '/tag/{tag<' . self::TAG_SLUG_REGEX . '>}' , [Controller\Tag::class, 'tag']);
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return Event::next;
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}
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/**
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* Process note by extracting any tags present
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*/
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public function onProcessNoteContent(Note $note, string $content)
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{
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$matched_tags = [];
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$processed_tags = false;
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preg_match_all(self::TAG_REGEX, $content, $matched_tags, PREG_SET_ORDER);
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foreach ($matched_tags as $match) {
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$tag = $match[2];
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$canonical_tag = self::canonicalTag($tag);
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DB::persist(NoteTag::create(['tag' => $tag, 'canonical' => $canonical_tag, 'note_id' => $note->getId()]));
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Cache::pushList("tag-{$canonical_tag}", $note);
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$processed_tags = true;
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}
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if ($processed_tags) {
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DB::flush();
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}
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}
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public function onRenderContent(string &$text)
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{
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$text = preg_replace_callback(self::TAG_REGEX, fn ($m) => $m[1] . $this->tagLink($m[2]), $text);
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}
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private function tagLink(string $tag): string
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{
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$canonical = self::canonicalTag($tag);
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$url = Router::url('tag', ['tag' => $canonical]);
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return HTML::html(['a' => ['attrs' => ['href' => $url, 'title' => $tag, 'rel' => 'tag'], $tag]], options: ['indent' => false]);
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}
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public static function canonicalTag(string $tag): string
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{
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return substr(Formatting::slugify($tag), 0, self::MAX_TAG_LENGTH);
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}
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}
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