1 files changed, 91 insertions, 0 deletions
diff --git a/www/wiki/includes/externalstore/ExternalStoreMedium.php b/www/wiki/includes/externalstore/ExternalStoreMedium.php
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+++ b/www/wiki/includes/externalstore/ExternalStoreMedium.php
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+<?php
+/**
+ * External storage in some particular medium.
+ *
+ * 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
+ * @ingroup ExternalStorage
+ */
+
+/**
+ * Accessable external objects in a particular storage medium
+ *
+ * @ingroup ExternalStorage
+ * @since 1.21
+ */
+abstract class ExternalStoreMedium {
+	/** @var array */
+	protected $params = [];
+
+	/**
+	 * @param array $params Usage context options:
+	 *   - wiki: the domain ID of the wiki this is being used for [optional]
+	 */
+	public function __construct( array $params = [] ) {
+		$this->params = $params;
+	}
+
+	/**
+	 * Fetch data from given external store URL
+	 *
+	 * @param string $url An external store URL
+	 * @return string|bool The text stored or false on error
+	 * @throws MWException
+	 */
+	abstract public function fetchFromURL( $url );
+
+	/**
+	 * Fetch data from given external store URLs.
+	 *
+	 * @param array $urls A list of external store URLs
+	 * @return array Map from the url to the text stored. Unfound data is not represented
+	 */
+	public function batchFetchFromURLs( array $urls ) {
+		$retval = [];
+		foreach ( $urls as $url ) {
+			$data = $this->fetchFromURL( $url );
+			// Dont return when false to allow for simpler implementations.
+			// errored urls are handled in ExternalStore::batchFetchFromURLs
+			if ( $data !== false ) {
+				$retval[$url] = $data;
+			}
+		}
+
+		return $retval;
+	}
+
+	/**
+	 * Insert a data item into a given location
+	 *
+	 * @param string $location The location name
+	 * @param string $data The data item
+	 * @return string|bool The URL of the stored data item, or false on error
+	 * @throws MWException
+	 */
+	abstract public function store( $location, $data );
+
+	/**
+	 * Check if a given location is read-only
+	 *
+	 * @param string $location The location name
+	 * @return bool Whether this location is read-only
+	 * @since 1.31
+	 */
+	public function isReadOnly( $location ) {
+		return false;
+	}
+}