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+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Base class for RC feed engines that send messages in a freely configurable
+ * format to a uri-addressed engine set in $wgRCEngines.
+ * @since 1.29
+ */
+abstract class FormattedRCFeed extends RCFeed {
+ private $params;
+
+ /**
+ * @param array $params
+ * - 'uri'
+ * - 'formatter'
+ * @see $wgRCFeeds
+ */
+ public function __construct( array $params = [] ) {
+ $this->params = $params;
+ }
+
+ /**
+ * Send some text to the specified feed.
+ *
+ * @param array $feed The feed, as configured in an associative array
+ * @param string $line The text to send
+ * @return bool Success
+ */
+ abstract public function send( array $feed, $line );
+
+ /**
+ * @param RecentChange $rc
+ * @param string|null $actionComment
+ * @return bool Success
+ */
+ public function notify( RecentChange $rc, $actionComment = null ) {
+ $params = $this->params;
+ /** @var RCFeedFormatter $formatter */
+ $formatter = is_object( $params['formatter'] ) ? $params['formatter'] : new $params['formatter'];
+
+ $line = $formatter->getLine( $params, $rc, $actionComment );
+ if ( !$line ) {
+ // @codeCoverageIgnoreStart
+ // T109544 - If a feed formatter returns null, this will otherwise cause an
+ // error in at least RedisPubSubFeedEngine. Not sure best to handle this.
+ return;
+ // @codeCoverageIgnoreEnd
+ }
+ return $this->send( $params, $line );
+ }
+}