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<?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 execute() {
$params = $this->extractRequestParams();
$rev1 = $this->revisionOrTitleOrId( $params['fromrev'], $params['fromtitle'], $params['fromid'] );
$rev2 = $this->revisionOrTitleOrId( $params['torev'], $params['totitle'], $params['toid'] );
$revision = Revision::newFromId( $rev1 );
if ( !$revision ) {
$this->dieUsage( 'The diff cannot be retrieved, ' .
'one revision does not exist or you do not have permission to view it.', 'baddiff' );
}
$contentHandler = $revision->getContentHandler();
$de = $contentHandler->createDifferenceEngine( $this->getContext(),
$rev1,
$rev2,
null, // rcid
true,
false );
$vals = array();
if ( isset( $params['fromtitle'] ) ) {
$vals['fromtitle'] = $params['fromtitle'];
}
if ( isset( $params['fromid'] ) ) {
$vals['fromid'] = $params['fromid'];
}
$vals['fromrevid'] = $rev1;
if ( isset( $params['totitle'] ) ) {
$vals['totitle'] = $params['totitle'];
}
if ( isset( $params['toid'] ) ) {
$vals['toid'] = $params['toid'];
}
$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
* @param $titleId int
* @return int
*/
private function revisionOrTitleOrId( $revision, $titleText, $titleId ) {
if ( $revision ) {
return $revision;
} elseif ( $titleText ) {
$title = Title::newFromText( $titleText );
if ( !$title || $title->isExternal() ) {
$this->dieUsageMsg( array( 'invalidtitle', $titleText ) );
}
return $title->getLatestRevID();
} elseif ( $titleId ) {
$title = Title::newFromID( $titleId );
if ( !$title ) {
$this->dieUsageMsg( array( 'nosuchpageid', $titleId ) );
}
return $title->getLatestRevID();
}
$this->dieUsage( 'inputneeded', 'A title, a page ID, or a revision number is needed for both the from and the to parameters' );
}
public function getAllowedParams() {
return array(
'fromtitle' => null,
'fromid' => array(
ApiBase::PARAM_TYPE => 'integer'
),
'fromrev' => array(
ApiBase::PARAM_TYPE => 'integer'
),
'totitle' => null,
'toid' => array(
ApiBase::PARAM_TYPE => 'integer'
),
'torev' => array(
ApiBase::PARAM_TYPE => 'integer'
),
);
}
public function getParamDescription() {
return array(
'fromtitle' => 'First title to compare',
'fromid' => 'First page ID to compare',
'fromrev' => 'First revision to compare',
'totitle' => 'Second title to compare',
'toid' => 'Second page ID to compare',
'torev' => 'Second revision to compare',
);
}
public function getResultProperties() {
return array(
'' => array(
'fromtitle' => array(
ApiBase::PROP_TYPE => 'string',
ApiBase::PROP_NULLABLE => true
),
'fromrevid' => 'integer',
'totitle' => array(
ApiBase::PROP_TYPE => 'string',
ApiBase::PROP_NULLABLE => true
),
'torevid' => 'integer',
'*' => 'string'
)
);
}
public function getDescription() {
return array(
'Get the difference between 2 pages',
'You must pass a revision number or a page title or a page ID id 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( 'nosuchpageid', 'pageid' ),
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.' ),
) );
}
public function getExamples() {
return array(
'api.php?action=compare&fromrev=1&torev=2' => 'Create a diff between revision 1 and 2',
);
}
}
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