summaryrefslogtreecommitdiff
path: root/includes/api/ApiExpandTemplates.php
blob: 8a3b534d4b412d07ac97c140761e917710145a80 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
<?php
/**
 *
 *
 * Created on Oct 05, 2007
 *
 * Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
 *
 * 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
 */

/**
 * API module that functions as a shortcut to the wikitext preprocessor. Expands
 * any templates in a provided string, and returns the result of this expansion
 * to the caller.
 *
 * @ingroup API
 */
class ApiExpandTemplates extends ApiBase {

	public function execute() {
		// Cache may vary on $wgUser because ParserOptions gets data from it
		$this->getMain()->setCacheMode( 'anon-public-user-private' );

		// Get parameters
		$params = $this->extractRequestParams();
		$this->requireMaxOneParameter( $params, 'prop', 'generatexml' );

		if ( $params['prop'] === null ) {
			$this->logFeatureUsage( 'action=expandtemplates&!prop' );
			$this->setWarning( 'Because no values have been specified for the prop parameter, a ' .
				'legacy format has been used for the output. This format is deprecated, and in ' .
				'the future, a default value will be set for the prop parameter, causing the new' .
				'format to always be used.' );
			$prop = array();
		} else {
			$prop = array_flip( $params['prop'] );
		}

		// Create title for parser
		$title_obj = Title::newFromText( $params['title'] );
		if ( !$title_obj || $title_obj->isExternal() ) {
			$this->dieUsageMsg( array( 'invalidtitle', $params['title'] ) );
		}

		$result = $this->getResult();

		// Parse text
		global $wgParser;
		$options = ParserOptions::newFromContext( $this->getContext() );

		if ( $params['includecomments'] ) {
			$options->setRemoveComments( false );
		}

		$retval = array();

		if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
			if ( !isset( $prop['parsetree'] ) ) {
				$this->logFeatureUsage( 'action=expandtemplates&generatexml' );
			}

			$wgParser->startExternalParse( $title_obj, $options, OT_PREPROCESS );
			$dom = $wgParser->preprocessToDom( $params['text'] );
			if ( is_callable( array( $dom, 'saveXML' ) ) ) {
				$xml = $dom->saveXML();
			} else {
				$xml = $dom->__toString();
			}
			if ( isset( $prop['parsetree'] ) ) {
				unset( $prop['parsetree'] );
				$retval['parsetree'] = $xml;
			} else {
				// the old way
				$xml_result = array();
				ApiResult::setContent( $xml_result, $xml );
				$result->addValue( null, 'parsetree', $xml_result );
			}
		}

		// if they didn't want any output except (probably) the parse tree,
		// then don't bother actually fully expanding it
		if ( $prop || $params['prop'] === null ) {
			$wgParser->startExternalParse( $title_obj, $options, OT_PREPROCESS );
			$frame = $wgParser->getPreprocessor()->newFrame();
			$wikitext = $wgParser->preprocess( $params['text'], $title_obj, $options, null, $frame );
			if ( $params['prop'] === null ) {
				// the old way
				ApiResult::setContent( $retval, $wikitext );
			} else {
				if ( isset( $prop['categories'] ) ) {
					$categories = $wgParser->getOutput()->getCategories();
					if ( !empty( $categories ) ) {
						$categories_result = array();
						foreach ( $categories as $category => $sortkey ) {
							$entry = array();
							$entry['sortkey'] = $sortkey;
							ApiResult::setContent( $entry, $category );
							$categories_result[] = $entry;
						}
						$result->setIndexedTagName( $categories_result, 'category' );
						$retval['categories'] = $categories_result;
					}
				}
				if ( isset( $prop['volatile'] ) && $frame->isVolatile() ) {
					$retval['volatile'] = '';
				}
				if ( isset( $prop['ttl'] ) && $frame->getTTL() !== null ) {
					$retval['ttl'] = $frame->getTTL();
				}
				if ( isset( $prop['wikitext'] ) ) {
					$retval['wikitext'] = $wikitext;
				}
			}
		}
		$result->setSubelements( $retval, array( 'wikitext', 'parsetree' ) );
		$result->addValue( null, $this->getModuleName(), $retval );
	}

	public function getAllowedParams() {
		return array(
			'title' => array(
				ApiBase::PARAM_DFLT => 'API',
			),
			'text' => array(
				ApiBase::PARAM_TYPE => 'string',
				ApiBase::PARAM_REQUIRED => true,
			),
			'prop' => array(
				ApiBase::PARAM_TYPE => array(
					'wikitext',
					'categories',
					'volatile',
					'ttl',
					'parsetree',
				),
				ApiBase::PARAM_ISMULTI => true,
			),
			'includecomments' => false,
			'generatexml' => array(
				ApiBase::PARAM_TYPE => 'boolean',
				ApiBase::PARAM_DEPRECATED => true,
			),
		);
	}

	public function getParamDescription() {
		return array(
			'text' => 'Wikitext to convert',
			'title' => 'Title of page',
			'prop' => array(
				'Which pieces of information to get',
				' wikitext   - The expanded wikitext',
				' categories - Any categories present in the input that are not represented in ' .
					'the wikitext output',
				' volatile   - Whether the output is volatile and should not be reused ' .
					'elsewhere within the page',
				' ttl        - The maximum time after which caches of the result should be ' .
					'invalidated',
				' parsetree  - The XML parse tree of the input',
				'Note that if no values are selected, the result will contain the wikitext,',
				'but the output will be in a deprecated format.',
			),
			'includecomments' => 'Whether to include HTML comments in the output',
			'generatexml' => 'Generate XML parse tree (replaced by prop=parsetree)',
		);
	}

	public function getDescription() {
		return 'Expands all templates in wikitext.';
	}

	public function getExamples() {
		return array(
			'api.php?action=expandtemplates&text={{Project:Sandbox}}'
		);
	}

	public function getHelpUrls() {
		return 'https://www.mediawiki.org/wiki/API:Parsing_wikitext#expandtemplates';
	}
}