summaryrefslogtreecommitdiff
path: root/includes/FileDeleteForm.php
blob: 28403ccacc8349bc35a1d119890105d4a07f8cb9 (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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
<?php
/**
 * File deletion user interface.
 *
 * 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
 * @author Rob Church <robchur@gmail.com>
 * @ingroup Media
 */

/**
 * File deletion user interface
 *
 * @ingroup Media
 */
class FileDeleteForm {

	/**
	 * @var Title
	 */
	private $title = null;

	/**
	 * @var File
	 */
	private $file = null;

	/**
	 * @var File
	 */
	private $oldfile = null;
	private $oldimage = '';

	/**
	 * Constructor
	 *
	 * @param $file File object we're deleting
	 */
	public function __construct( $file ) {
		$this->title = $file->getTitle();
		$this->file = $file;
	}

	/**
	 * Fulfil the request; shows the form or deletes the file,
	 * pending authentication, confirmation, etc.
	 */
	public function execute() {
		global $wgOut, $wgRequest, $wgUser, $wgUploadMaintenance;

		$permissionErrors = $this->title->getUserPermissionsErrors( 'delete', $wgUser );
		if ( count( $permissionErrors ) ) {
			throw new PermissionsError( 'delete', $permissionErrors );
		}

		if ( wfReadOnly() ) {
			throw new ReadOnlyError;
		}

		if ( $wgUploadMaintenance ) {
			throw new ErrorPageError( 'filedelete-maintenance-title', 'filedelete-maintenance' );
		}

		$this->setHeaders();

		$this->oldimage = $wgRequest->getText( 'oldimage', false );
		$token = $wgRequest->getText( 'wpEditToken' );
		# Flag to hide all contents of the archived revisions
		$suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );

		if( $this->oldimage ) {
			$this->oldfile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->title, $this->oldimage );
		}

		if( !self::haveDeletableFile( $this->file, $this->oldfile, $this->oldimage ) ) {
			$wgOut->addHTML( $this->prepareMessage( 'filedelete-nofile' ) );
			$wgOut->addReturnTo( $this->title );
			return;
		}

		// Perform the deletion if appropriate
		if( $wgRequest->wasPosted() && $wgUser->matchEditToken( $token, $this->oldimage ) ) {
			$deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList' );
			$deleteReason = $wgRequest->getText( 'wpReason' );

			if ( $deleteReasonList == 'other' ) {
				$reason = $deleteReason;
			} elseif ( $deleteReason != '' ) {
				// Entry from drop down menu + additional comment
				$reason = $deleteReasonList . wfMessage( 'colon-separator' )
					->inContentLanguage()->text() . $deleteReason;
			} else {
				$reason = $deleteReasonList;
			}

			$status = self::doDelete( $this->title, $this->file, $this->oldimage, $reason, $suppress, $wgUser );

			if( !$status->isGood() ) {
				$wgOut->addHTML( '<h2>' . $this->prepareMessage( 'filedeleteerror-short' ) . "</h2>\n" );
				$wgOut->addWikiText( '<div class="error">' . $status->getWikiText( 'filedeleteerror-short', 'filedeleteerror-long' ) . '</div>' );
			}
			if( $status->ok ) {
				$wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
				$wgOut->addHTML( $this->prepareMessage( 'filedelete-success' ) );
				// Return to the main page if we just deleted all versions of the
				// file, otherwise go back to the description page
				$wgOut->addReturnTo( $this->oldimage ? $this->title : Title::newMainPage() );

				if ( $wgUser->isLoggedIn() && $wgRequest->getCheck( 'wpWatch' ) != $wgUser->isWatched( $this->title ) ) {
					if ( $wgRequest->getCheck( 'wpWatch' ) ) {
						WatchAction::doWatch( $this->title, $wgUser );
					} else {
						WatchAction::doUnwatch( $this->title, $wgUser );
					}
				}
			}
			return;
		}

		$this->showForm();
		$this->showLogEntries();
	}

	/**
	 * Really delete the file
	 *
	 * @param $title Title object
	 * @param File $file: file object
	 * @param string $oldimage archive name
	 * @param string $reason reason of the deletion
	 * @param $suppress Boolean: whether to mark all deleted versions as restricted
	 * @param $user User object performing the request
	 * @throws MWException
	 * @return bool|Status
	 */
	public static function doDelete( &$title, &$file, &$oldimage, $reason, $suppress, User $user = null ) {
		if ( $user === null ) {
			global $wgUser;
			$user = $wgUser;
		}

		if( $oldimage ) {
			$page = null;
			$status = $file->deleteOld( $oldimage, $reason, $suppress );
			if( $status->ok ) {
				// Need to do a log item
				$logComment = wfMessage( 'deletedrevision', $oldimage )->inContentLanguage()->text();
				if( trim( $reason ) != '' ) {
					$logComment .= wfMessage( 'colon-separator' )
						->inContentLanguage()->text() . $reason;
				}

				$logtype = $suppress ? 'suppress' : 'delete';

				$logEntry = new ManualLogEntry( $logtype, 'delete' );
				$logEntry->setPerformer( $user );
				$logEntry->setTarget( $title );
				$logEntry->setComment( $logComment );
				$logid = $logEntry->insert();
				$logEntry->publish( $logid );
			}
		} else {
			$status = Status::newFatal( 'cannotdelete',
				wfEscapeWikiText( $title->getPrefixedText() )
			);
			$page = WikiPage::factory( $title );
			$dbw = wfGetDB( DB_MASTER );
			try {
				// delete the associated article first
				$error = '';
				$deleteStatus = $page->doDeleteArticleReal( $reason, $suppress, 0, false, $error, $user );
				// doDeleteArticleReal() returns a non-fatal error status if the page
				// or revision is missing, so check for isOK() rather than isGood()
				if ( $deleteStatus->isOK() ) {
					$status = $file->delete( $reason, $suppress );
					if( $status->isOK() ) {
						$dbw->commit( __METHOD__ );
					} else {
						$dbw->rollback( __METHOD__ );
					}
				}
			} catch ( MWException $e ) {
				// rollback before returning to prevent UI from displaying incorrect "View or restore N deleted edits?"
				$dbw->rollback( __METHOD__ );
				throw $e;
			}
		}

		if ( $status->isOK() ) {
			wfRunHooks( 'FileDeleteComplete', array( &$file, &$oldimage, &$page, &$user, &$reason ) );
		}

		return $status;
	}

	/**
	 * Show the confirmation form
	 */
	private function showForm() {
		global $wgOut, $wgUser, $wgRequest;

		if( $wgUser->isAllowed( 'suppressrevision' ) ) {
			$suppress = "<tr id=\"wpDeleteSuppressRow\">
					<td></td>
					<td class='mw-input'><strong>" .
						Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
							'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '3' ) ) .
					"</strong></td>
				</tr>";
		} else {
			$suppress = '';
		}

		$checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $wgUser->isWatched( $this->title );
		$form = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getAction(),
			'id' => 'mw-img-deleteconfirm' ) ) .
			Xml::openElement( 'fieldset' ) .
			Xml::element( 'legend', null, wfMessage( 'filedelete-legend' )->text() ) .
			Html::hidden( 'wpEditToken', $wgUser->getEditToken( $this->oldimage ) ) .
			$this->prepareMessage( 'filedelete-intro' ) .
			Xml::openElement( 'table', array( 'id' => 'mw-img-deleteconfirm-table' ) ) .
			"<tr>
				<td class='mw-label'>" .
					Xml::label( wfMessage( 'filedelete-comment' )->text(), 'wpDeleteReasonList' ) .
				"</td>
				<td class='mw-input'>" .
					Xml::listDropDown(
						'wpDeleteReasonList',
						wfMessage( 'filedelete-reason-dropdown' )->inContentLanguage()->text(),
						wfMessage( 'filedelete-reason-otherlist' )->inContentLanguage()->text(),
						'',
						'wpReasonDropDown',
						1
					) .
				"</td>
			</tr>
			<tr>
				<td class='mw-label'>" .
					Xml::label( wfMessage( 'filedelete-otherreason' )->text(), 'wpReason' ) .
				"</td>
				<td class='mw-input'>" .
					Xml::input( 'wpReason', 60, $wgRequest->getText( 'wpReason' ),
						array( 'type' => 'text', 'maxlength' => '255', 'tabindex' => '2', 'id' => 'wpReason' ) ) .
				"</td>
			</tr>
			{$suppress}";
		if( $wgUser->isLoggedIn() ) {
			$form .= "
			<tr>
				<td></td>
				<td class='mw-input'>" .
					Xml::checkLabel( wfMessage( 'watchthis' )->text(),
						'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
				"</td>
			</tr>";
		}
		$form .= "
			<tr>
				<td></td>
				<td class='mw-submit'>" .
					Xml::submitButton( wfMessage( 'filedelete-submit' )->text(),
						array( 'name' => 'mw-filedelete-submit', 'id' => 'mw-filedelete-submit', 'tabindex' => '4' ) ) .
				"</td>
			</tr>" .
			Xml::closeElement( 'table' ) .
			Xml::closeElement( 'fieldset' ) .
			Xml::closeElement( 'form' );

			if ( $wgUser->isAllowed( 'editinterface' ) ) {
				$title = Title::makeTitle( NS_MEDIAWIKI, 'Filedelete-reason-dropdown' );
				$link = Linker::link(
					$title,
					wfMessage( 'filedelete-edit-reasonlist' )->escaped(),
					array(),
					array( 'action' => 'edit' )
				);
				$form .= '<p class="mw-filedelete-editreasons">' . $link . '</p>';
			}

		$wgOut->addHTML( $form );
	}

	/**
	 * Show deletion log fragments pertaining to the current file
	 */
	private function showLogEntries() {
		global $wgOut;
		$deleteLogPage = new LogPage( 'delete' );
		$wgOut->addHTML( '<h2>' . $deleteLogPage->getName()->escaped() . "</h2>\n" );
		LogEventsList::showLogExtract( $wgOut, 'delete', $this->title );
	}

	/**
	 * Prepare a message referring to the file being deleted,
	 * showing an appropriate message depending upon whether
	 * it's a current file or an old version
	 *
	 * @param string $message message base
	 * @return String
	 */
	private function prepareMessage( $message ) {
		global $wgLang;
		if( $this->oldimage ) {
			return wfMessage(
				"{$message}-old", # To ensure grep will find them: 'filedelete-intro-old', 'filedelete-nofile-old', 'filedelete-success-old'
				wfEscapeWikiText( $this->title->getText() ),
				$wgLang->date( $this->getTimestamp(), true ),
				$wgLang->time( $this->getTimestamp(), true ),
				wfExpandUrl( $this->file->getArchiveUrl( $this->oldimage ), PROTO_CURRENT ) )->parseAsBlock();
		} else {
			return wfMessage(
				$message,
				wfEscapeWikiText( $this->title->getText() )
			)->parseAsBlock();
		}
	}

	/**
	 * Set headers, titles and other bits
	 */
	private function setHeaders() {
		global $wgOut;
		$wgOut->setPageTitle( wfMessage( 'filedelete', $this->title->getText() ) );
		$wgOut->setRobotPolicy( 'noindex,nofollow' );
		$wgOut->addBacklinkSubtitle( $this->title );
	}

	/**
	 * Is the provided `oldimage` value valid?
	 *
	 * @return bool
	 */
	public static function isValidOldSpec( $oldimage ) {
		return strlen( $oldimage ) >= 16
			&& strpos( $oldimage, '/' ) === false
			&& strpos( $oldimage, '\\' ) === false;
	}

	/**
	 * Could we delete the file specified? If an `oldimage`
	 * value was provided, does it correspond to an
	 * existing, local, old version of this file?
	 *
	 * @param $file File
	 * @param $oldfile File
	 * @param $oldimage File
	 * @return bool
	 */
	public static function haveDeletableFile( &$file, &$oldfile, $oldimage ) {
		return $oldimage
			? $oldfile && $oldfile->exists() && $oldfile->isLocal()
			: $file && $file->exists() && $file->isLocal();
	}

	/**
	 * Prepare the form action
	 *
	 * @return string
	 */
	private function getAction() {
		$q = array();
		$q['action'] = 'delete';

		if( $this->oldimage ) {
			$q['oldimage'] = $this->oldimage;
		}

		return $this->title->getLocalUrl( $q );
	}

	/**
	 * Extract the timestamp of the old version
	 *
	 * @return string
	 */
	private function getTimestamp() {
		return $this->oldfile->getTimestamp();
	}
}