4 * Created on May 1, 2011
6 * Copyright © 2011 Sam Reed
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 * http://www.gnu.org/copyleft/gpl.html
26 class ApiComparePages
extends ApiBase
{
28 public function execute() {
29 $params = $this->extractRequestParams();
31 $rev1 = $this->revisionOrTitleOrId( $params['fromrev'], $params['fromtitle'], $params['fromid'] );
32 $rev2 = $this->revisionOrTitleOrId( $params['torev'], $params['totitle'], $params['toid'] );
34 $revision = Revision
::newFromId( $rev1 );
37 $this->dieUsage( 'The diff cannot be retrieved, ' .
38 'one revision does not exist or you do not have permission to view it.', 'baddiff' );
41 $contentHandler = $revision->getContentHandler();
42 $de = $contentHandler->createDifferenceEngine( $this->getContext(),
50 if ( isset( $params['fromtitle'] ) ) {
51 $vals['fromtitle'] = $params['fromtitle'];
53 if ( isset( $params['fromid'] ) ) {
54 $vals['fromid'] = $params['fromid'];
56 $vals['fromrevid'] = $rev1;
57 if ( isset( $params['totitle'] ) ) {
58 $vals['totitle'] = $params['totitle'];
60 if ( isset( $params['toid'] ) ) {
61 $vals['toid'] = $params['toid'];
63 $vals['torevid'] = $rev2;
65 $difftext = $de->getDiffBody();
67 if ( $difftext === false ) {
68 $this->dieUsage( 'The diff cannot be retrieved. ' .
69 'Maybe one or both revisions do not exist or you do not have permission to view them.', 'baddiff' );
71 ApiResult
::setContent( $vals, $difftext );
74 $this->getResult()->addValue( null, $this->getModuleName(), $vals );
78 * @param $revision int
79 * @param $titleText string
83 private function revisionOrTitleOrId( $revision, $titleText, $titleId ) {
86 } elseif ( $titleText ) {
87 $title = Title
::newFromText( $titleText );
88 if ( !$title ||
$title->isExternal() ) {
89 $this->dieUsageMsg( array( 'invalidtitle', $titleText ) );
91 return $title->getLatestRevID();
92 } elseif ( $titleId ) {
93 $title = Title
::newFromID( $titleId );
95 $this->dieUsageMsg( array( 'nosuchpageid', $titleId ) );
97 return $title->getLatestRevID();
99 $this->dieUsage( 'inputneeded', 'A title, a page ID, or a revision number is needed for both the from and the to parameters' );
102 public function getAllowedParams() {
106 ApiBase
::PARAM_TYPE
=> 'integer'
109 ApiBase
::PARAM_TYPE
=> 'integer'
113 ApiBase
::PARAM_TYPE
=> 'integer'
116 ApiBase
::PARAM_TYPE
=> 'integer'
121 public function getParamDescription() {
123 'fromtitle' => 'First title to compare',
124 'fromid' => 'First page ID to compare',
125 'fromrev' => 'First revision to compare',
126 'totitle' => 'Second title to compare',
127 'toid' => 'Second page ID to compare',
128 'torev' => 'Second revision to compare',
132 public function getResultProperties() {
135 'fromtitle' => array(
136 ApiBase
::PROP_TYPE
=> 'string',
137 ApiBase
::PROP_NULLABLE
=> true
139 'fromrevid' => 'integer',
141 ApiBase
::PROP_TYPE
=> 'string',
142 ApiBase
::PROP_NULLABLE
=> true
144 'torevid' => 'integer',
150 public function getDescription() {
152 'Get the difference between 2 pages',
153 'You must pass a revision number or a page title or a page ID id for each part (1 and 2)'
157 public function getPossibleErrors() {
158 return array_merge( parent
::getPossibleErrors(), array(
159 array( 'code' => 'inputneeded', 'info' => 'A title or a revision is needed' ),
160 array( 'invalidtitle', 'title' ),
161 array( 'nosuchpageid', 'pageid' ),
162 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.' ),
166 public function getExamples() {
168 'api.php?action=compare&fromrev=1&torev=2' => 'Create a diff between revision 1 and 2',