1 files changed, 130 insertions, 0 deletions
diff --git a/includes/api/ApiComparePages.php b/includes/api/ApiComparePages.php
new file mode 100644
index 00000000..d43fa53f
--- /dev/null
+++ b/includes/api/ApiComparePages.php
@@ -0,0 +1,130 @@
+<?php
+/**
+ *
+ * Created on May 1, 2011
+ *
+ * Copyright © 2011 Sam Reed
+ *
+ * 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
+ */
+
+class ApiComparePages extends ApiBase {
+
+	public function __construct( $main, $action ) {
+		parent::__construct( $main, $action );
+	}
+
+	public function execute() {
+		$params = $this->extractRequestParams();
+
+		$rev1 = $this->revisionOrTitle( $params['fromrev'], $params['fromtitle'] );
+		$rev2 = $this->revisionOrTitle( $params['torev'], $params['totitle'] );
+
+		$de = new DifferenceEngine( null,
+			$rev1,
+			$rev2,
+			null, // rcid
+			true,
+			false );
+
+		$vals = array();
+		if ( isset( $params['fromtitle'] ) ) {
+			$vals['fromtitle'] = $params['fromtitle'];
+		}
+		$vals['fromrevid'] = $rev1;
+		if ( isset( $params['totitle'] ) ) {
+			$vals['totitle'] = $params['totitle'];
+		}
+		$vals['torevid'] = $rev2;
+
+		$difftext = $de->getDiffBody();
+
+		if ( $difftext === false ) {
+			$this->dieUsage( 'The diff cannot be retrieved. ' .
+				'Maybe one or both revisions do not exist or you do not have permission to view them.', 'baddiff' );
+		} else {
+			ApiResult::setContent( $vals, $difftext );
+		}
+
+		$this->getResult()->addValue( null, $this->getModuleName(), $vals );
+	}
+
+	/**
+	 * @param $revision int
+	 * @param $titleText string
+	 * @return int
+	 */
+	private function revisionOrTitle( $revision, $titleText ) {
+		if( $revision ){
+			return $revision;
+		} elseif( $titleText ) {
+			$title = Title::newFromText( $titleText );
+			if( !$title ){
+				$this->dieUsageMsg( array( 'invalidtitle', $titleText ) );
+			}
+			return $title->getLatestRevID();
+		}
+		$this->dieUsage( 'inputneeded', 'A title or a revision number is needed for both the from and the to parameters' );
+	}
+
+	public function getAllowedParams() {
+		return array(
+			'fromtitle' => null,
+			'fromrev' => array(
+				ApiBase::PARAM_TYPE => 'integer'
+			),
+			'totitle' => null,
+			'torev' => array(
+				ApiBase::PARAM_TYPE => 'integer'
+			),
+		);
+	}
+
+	public function getParamDescription() {
+		return array(
+			'fromtitle' => 'First title to compare',
+			'fromrev' => 'First revision to compare',
+			'totitle' => 'Second title to compare',
+			'torev' => 'Second revision to compare',
+		);
+	}
+	public function getDescription() {
+		return array(
+			'Get the difference between 2 pages',
+			'You must pass a revision number or a page title for each part (1 and 2)'
+		);
+	}
+
+	public function getPossibleErrors() {
+		return array_merge( parent::getPossibleErrors(), array(
+			array( 'code' => 'inputneeded', 'info' => 'A title or a revision is needed' ),
+			array( 'invalidtitle', 'title' ),
+			array( 'code' => 'baddiff', 'info' => 'The diff cannot be retrieved. Maybe one or both revisions do not exist or you do not have permission to view them.' ),
+		) );
+	}
+
+	protected function getExamples() {
+		return array(
+			'api.php?action=compare&fromrev=1&torev=2',
+		);
+	}
+
+	public function getVersion() {
+		return __CLASS__ . ': $Id: ApiComparePages.php 92400 2011-07-17 16:51:11Z reedy $';
+	}
+}