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PhabricatorRemarkupRuleMention.php
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Wed, Jan 29, 06:22

PhabricatorRemarkupRuleMention.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @group markup
*/
class PhabricatorRemarkupRuleMention
extends PhutilRemarkupRule {
private $actualUsers;
public function apply($text) {
// NOTE: Negative lookahead for period prevents us from picking up email
// addresses, while allowing constructs like "@tomo, lol". The negative
// lookbehind for a word character prevents us from matching "mail@lists"
// while allowing "@tomo/@mroch". The negative lookahead prevents us from
// matching "@joe.com" while allowing us to match "hey, @joe.".
$regexp = '/(?<!\w)@([a-zA-Z0-9]+)\b(?![.]\w)/';
$matches = null;
$ok = preg_match_all($regexp, $text, $matches);
if (!$ok) {
// No mentions in this text.
return $text;
}
$usernames = $matches[1];
// TODO: This is a little sketchy perf-wise. Once APC comes up, it is an
// ideal candidate to back with an APC cache.
$user_table = new PhabricatorUser();
$real_user_names = queryfx_all(
$user_table->establishConnection('r'),
'SELECT username, phid, realName FROM %T WHERE username IN (%Ls)',
$user_table->getTableName(),
$usernames);
$engine = $this->getEngine();
$metadata_key = 'phabricator.mentioned-user-phids';
$mentioned = $engine->getTextMetadata($metadata_key, array());
foreach ($real_user_names as $row) {
$this->actualUsers[strtolower($row['username'])] = $row;
$mentioned[$row['phid']] = $row['phid'];
}
$engine->setTextMetadata($metadata_key, $mentioned);
return preg_replace_callback(
$regexp,
array($this, 'markupMention'),
$text);
}
public function markupMention($matches) {
$username = strtolower($matches[1]);
$exists = isset($this->actualUsers[$username]);
$real = $this->actualUsers[$username]['realName'];
$class = $exists
? 'phabricator-remarkup-mention-exists'
: 'phabricator-remarkup-mention-unknown';
if ($exists) {
$tag = phutil_render_tag(
'a',
array(
'class' => $class,
'href' => '/p/'.$username.'/',
'target' => '_blank',
'title' => $real,
),
phutil_escape_html('@'.$username));
} else {
$tag = phutil_render_tag(
'span',
array(
'class' => $class,
),
phutil_escape_html('@'.$username));
}
return $this->getEngine()->storeText($tag);
}
}

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