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1<?php
2/**
3 * Copyright © 2007 Roan Kattouw <roan.kattouw@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 */
22
23namespace MediaWiki\Api;
24
25use MediaWiki\Cache\LinkBatchFactory;
26use MediaWiki\ChangeTags\ChangeTagsStore;
27use MediaWiki\CommentFormatter\RowCommentFormatter;
28use MediaWiki\CommentStore\CommentStore;
29use MediaWiki\ParamValidator\TypeDef\UserDef;
30use MediaWiki\Revision\RevisionRecord;
31use MediaWiki\Revision\RevisionStore;
32use MediaWiki\Revision\SlotRecord;
33use MediaWiki\Storage\NameTableAccessException;
34use MediaWiki\Storage\NameTableStore;
35use MediaWiki\Title\Title;
36use Wikimedia\ParamValidator\ParamValidator;
37use Wikimedia\ParamValidator\TypeDef\EnumDef;
38use Wikimedia\ParamValidator\TypeDef\IntegerDef;
39use Wikimedia\Rdbms\IExpression;
40use Wikimedia\Rdbms\LikeValue;
41
42/**
43 * Query module to enumerate all deleted revisions.
44 *
45 * @ingroup API
46 * @deprecated since 1.25
47 */
48class ApiQueryDeletedrevs extends ApiQueryBase {
49
50    private CommentStore $commentStore;
51    private RowCommentFormatter $commentFormatter;
52    private RevisionStore $revisionStore;
53    private NameTableStore $changeTagDefStore;
54    private ChangeTagsStore $changeTagsStore;
55    private LinkBatchFactory $linkBatchFactory;
56
57    public function __construct(
58        ApiQuery $query,
59        string $moduleName,
60        CommentStore $commentStore,
61        RowCommentFormatter $commentFormatter,
62        RevisionStore $revisionStore,
63        NameTableStore $changeTagDefStore,
64        ChangeTagsStore $changeTagsStore,
65        LinkBatchFactory $linkBatchFactory
66    ) {
67        parent::__construct( $query, $moduleName, 'dr' );
68        $this->commentStore = $commentStore;
69        $this->commentFormatter = $commentFormatter;
70        $this->revisionStore = $revisionStore;
71        $this->changeTagDefStore = $changeTagDefStore;
72        $this->changeTagsStore = $changeTagsStore;
73        $this->linkBatchFactory = $linkBatchFactory;
74    }
75
76    public function execute() {
77        // Before doing anything at all, let's check permissions
78        $this->checkUserRightsAny( 'deletedhistory' );
79
80        $this->addDeprecation( 'apiwarn-deprecation-deletedrevs', 'action=query&list=deletedrevs' );
81
82        $user = $this->getUser();
83        $db = $this->getDB();
84        $params = $this->extractRequestParams( false );
85        $prop = array_fill_keys( $params['prop'], true );
86        $fld_parentid = isset( $prop['parentid'] );
87        $fld_revid = isset( $prop['revid'] );
88        $fld_user = isset( $prop['user'] );
89        $fld_userid = isset( $prop['userid'] );
90        $fld_comment = isset( $prop['comment'] );
91        $fld_parsedcomment = isset( $prop['parsedcomment'] );
92        $fld_minor = isset( $prop['minor'] );
93        $fld_len = isset( $prop['len'] );
94        $fld_sha1 = isset( $prop['sha1'] );
95        $fld_content = isset( $prop['content'] );
96        $fld_token = isset( $prop['token'] );
97        $fld_tags = isset( $prop['tags'] );
98
99        // If we're in a mode that breaks the same-origin policy, no tokens can
100        // be obtained
101        if ( $this->lacksSameOriginSecurity() ||
102            // If user can't undelete, no tokens
103            !$this->getAuthority()->isAllowed( 'undelete' )
104        ) {
105            $fld_token = false;
106        }
107
108        $result = $this->getResult();
109        $pageSet = $this->getPageSet();
110        $titles = $pageSet->getPages();
111
112        // This module operates in three modes:
113        // 'revs': List deleted revs for certain titles (1)
114        // 'user': List deleted revs by a certain user (2)
115        // 'all': List all deleted revs in NS (3)
116        $mode = 'all';
117        if ( count( $titles ) > 0 ) {
118            $mode = 'revs';
119        } elseif ( $params['user'] !== null ) {
120            $mode = 'user';
121        }
122
123        if ( $mode == 'revs' || $mode == 'user' ) {
124            // Ignore namespace and unique due to inability to know whether they were purposely set
125            foreach ( [ 'from', 'to', 'prefix', /*'namespace', 'unique'*/ ] as $p ) {
126                if ( $params[$p] !== null ) {
127                    $this->dieWithError( [ 'apierror-deletedrevs-param-not-1-2', $p ], 'badparams' );
128                }
129            }
130        } else {
131            foreach ( [ 'start', 'end' ] as $p ) {
132                if ( $params[$p] !== null ) {
133                    $this->dieWithError( [ 'apierror-deletedrevs-param-not-3', $p ], 'badparams' );
134                }
135            }
136        }
137
138        if ( $params['user'] !== null && $params['excludeuser'] !== null ) {
139            $this->dieWithError( 'user and excludeuser cannot be used together', 'badparams' );
140        }
141
142        $arQuery = $this->revisionStore->getArchiveQueryInfo();
143        $this->addTables( $arQuery['tables'] );
144        $this->addFields( $arQuery['fields'] );
145        $this->addJoinConds( $arQuery['joins'] );
146        $this->addFields( [ 'ar_title', 'ar_namespace' ] );
147
148        if ( $fld_tags ) {
149            $this->addFields( [
150                'ts_tags' => $this->changeTagsStore->makeTagSummarySubquery( 'archive' )
151            ] );
152        }
153
154        if ( $params['tag'] !== null ) {
155            $this->addTables( 'change_tag' );
156            $this->addJoinConds(
157                [ 'change_tag' => [ 'JOIN', [ 'ar_rev_id=ct_rev_id' ] ] ]
158            );
159            try {
160                $this->addWhereFld( 'ct_tag_id', $this->changeTagDefStore->getId( $params['tag'] ) );
161            } catch ( NameTableAccessException ) {
162                // Return nothing.
163                $this->addWhere( '1=0' );
164            }
165        }
166
167        // This means stricter restrictions
168        if ( $fld_content ) {
169            $this->checkUserRightsAny( [ 'deletedtext', 'undelete' ] );
170        }
171        // Check limits
172        $userMax = $fld_content ? ApiBase::LIMIT_SML1 : ApiBase::LIMIT_BIG1;
173        $botMax = $fld_content ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_BIG2;
174
175        $limit = $params['limit'];
176
177        if ( $limit == 'max' ) {
178            $limit = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
179            $this->getResult()->addParsedLimit( $this->getModuleName(), $limit );
180        }
181
182        $limit = $this->getMain()->getParamValidator()->validateValue(
183            $this, 'limit', $limit, [
184                ParamValidator::PARAM_TYPE => 'limit',
185                IntegerDef::PARAM_MIN => 1,
186                IntegerDef::PARAM_MAX => $userMax,
187                IntegerDef::PARAM_MAX2 => $botMax,
188                IntegerDef::PARAM_IGNORE_RANGE => true,
189            ]
190        );
191
192        if ( $fld_token ) {
193            // Undelete tokens are identical for all pages, so we cache one here
194            $token = $user->getEditToken( '', $this->getMain()->getRequest() );
195        }
196
197        $dir = $params['dir'];
198
199        // We need a custom WHERE clause that matches all titles.
200        if ( $mode == 'revs' ) {
201            $lb = $this->linkBatchFactory->newLinkBatch( $titles );
202            $where = $lb->constructSet( 'ar', $db );
203            $this->addWhere( $where );
204        } elseif ( $mode == 'all' ) {
205            $this->addWhereFld( 'ar_namespace', $params['namespace'] );
206
207            $from = $params['from'] === null
208                ? null
209                : $this->titlePartToKey( $params['from'], $params['namespace'] );
210            $to = $params['to'] === null
211                ? null
212                : $this->titlePartToKey( $params['to'], $params['namespace'] );
213            $this->addWhereRange( 'ar_title', $dir, $from, $to );
214
215            if ( isset( $params['prefix'] ) ) {
216                $this->addWhere(
217                    $db->expr(
218                        'ar_title',
219                        IExpression::LIKE,
220                        new LikeValue(
221                            $this->titlePartToKey( $params['prefix'], $params['namespace'] ),
222                            $db->anyString()
223                        )
224                    )
225                );
226            }
227        }
228
229        if ( $params['user'] !== null ) {
230            // We already join on actor due to getArchiveQueryInfo()
231            $this->addWhereFld( 'actor_name', $params['user'] );
232        } elseif ( $params['excludeuser'] !== null ) {
233            $this->addWhere( $db->expr( 'actor_name', '!=', $params['excludeuser'] ) );
234        }
235
236        if ( $params['user'] !== null || $params['excludeuser'] !== null ) {
237            // Paranoia: avoid brute force searches (T19342)
238            // (shouldn't be able to get here without 'deletedhistory', but
239            // check it again just in case)
240            if ( !$this->getAuthority()->isAllowed( 'deletedhistory' ) ) {
241                $bitmask = RevisionRecord::DELETED_USER;
242            } elseif ( !$this->getAuthority()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
243                $bitmask = RevisionRecord::DELETED_USER | RevisionRecord::DELETED_RESTRICTED;
244            } else {
245                $bitmask = 0;
246            }
247            if ( $bitmask ) {
248                $this->addWhere( $db->bitAnd( 'ar_deleted', $bitmask ) . " != $bitmask" );
249            }
250        }
251
252        if ( $params['continue'] !== null ) {
253            $op = ( $dir == 'newer' ? '>=' : '<=' );
254            if ( $mode == 'all' || $mode == 'revs' ) {
255                $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'int', 'string', 'timestamp', 'int' ] );
256                $this->addWhere( $db->buildComparison( $op, [
257                    'ar_namespace' => $cont[0],
258                    'ar_title' => $cont[1],
259                    'ar_timestamp' => $db->timestamp( $cont[2] ),
260                    'ar_id' => $cont[3],
261                ] ) );
262            } else {
263                $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'timestamp', 'int' ] );
264                $this->addWhere( $db->buildComparison( $op, [
265                    'ar_timestamp' => $db->timestamp( $cont[0] ),
266                    'ar_id' => $cont[1],
267                ] ) );
268            }
269        }
270
271        $this->addOption( 'LIMIT', $limit + 1 );
272        if ( $mode == 'all' ) {
273            if ( $params['unique'] ) {
274                // @todo Does this work on non-MySQL?
275                $this->addOption( 'GROUP BY', 'ar_title' );
276            } else {
277                $sort = ( $dir == 'newer' ? '' : ' DESC' );
278                $this->addOption( 'ORDER BY', [
279                    'ar_title' . $sort,
280                    'ar_timestamp' . $sort,
281                    'ar_id' . $sort,
282                ] );
283            }
284        } else {
285            if ( $mode == 'revs' ) {
286                // Sort by ns and title in the same order as timestamp for efficiency
287                $this->addWhereRange( 'ar_namespace', $dir, null, null );
288                $this->addWhereRange( 'ar_title', $dir, null, null );
289            }
290            $this->addTimestampWhereRange( 'ar_timestamp', $dir, $params['start'], $params['end'] );
291            // Include in ORDER BY for uniqueness
292            $this->addWhereRange( 'ar_id', $dir, null, null );
293        }
294        $res = $this->select( __METHOD__ );
295
296        $formattedComments = [];
297        if ( $fld_parsedcomment ) {
298            $formattedComments = $this->commentFormatter->formatItems(
299                $this->commentFormatter->rows( $res )
300                    ->indexField( 'ar_id' )
301                    ->commentKey( 'ar_comment' )
302                    ->namespaceField( 'ar_namespace' )
303                    ->titleField( 'ar_title' )
304            );
305        }
306
307        $pageMap = []; // Maps ns&title to (fake) pageid
308        $count = 0;
309        $newPageID = 0;
310        foreach ( $res as $row ) {
311            if ( ++$count > $limit ) {
312                // We've had enough
313                if ( $mode == 'all' || $mode == 'revs' ) {
314                    $this->setContinueEnumParameter( 'continue',
315                        "$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
316                    );
317                } else {
318                    $this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
319                }
320                break;
321            }
322
323            $rev = [];
324            $anyHidden = false;
325
326            $rev['timestamp'] = wfTimestamp( TS_ISO_8601, $row->ar_timestamp );
327            if ( $fld_revid ) {
328                $rev['revid'] = (int)$row->ar_rev_id;
329            }
330            if ( $fld_parentid && $row->ar_parent_id !== null ) {
331                $rev['parentid'] = (int)$row->ar_parent_id;
332            }
333            if ( $fld_user || $fld_userid ) {
334                if ( $row->ar_deleted & RevisionRecord::DELETED_USER ) {
335                    $rev['userhidden'] = true;
336                    $anyHidden = true;
337                }
338                if ( RevisionRecord::userCanBitfield(
339                    $row->ar_deleted,
340                    RevisionRecord::DELETED_USER,
341                    $user
342                ) ) {
343                    if ( $fld_user ) {
344                        $rev['user'] = $row->ar_user_text;
345                    }
346                    if ( $fld_userid ) {
347                        $rev['userid'] = (int)$row->ar_user;
348                    }
349                }
350            }
351
352            if ( $fld_comment || $fld_parsedcomment ) {
353                if ( $row->ar_deleted & RevisionRecord::DELETED_COMMENT ) {
354                    $rev['commenthidden'] = true;
355                    $anyHidden = true;
356                }
357                if ( RevisionRecord::userCanBitfield(
358                    $row->ar_deleted,
359                    RevisionRecord::DELETED_COMMENT,
360                    $user
361                ) ) {
362                    $comment = $this->commentStore->getComment( 'ar_comment', $row )->text;
363                    if ( $fld_comment ) {
364                        $rev['comment'] = $comment;
365                    }
366                    if ( $fld_parsedcomment ) {
367                        $rev['parsedcomment'] = $formattedComments[$row->ar_id];
368                    }
369                }
370            }
371
372            if ( $fld_minor ) {
373                $rev['minor'] = $row->ar_minor_edit == 1;
374            }
375            if ( $fld_len ) {
376                $rev['len'] = $row->ar_len;
377            }
378            if ( $fld_sha1 ) {
379                if ( $row->ar_deleted & RevisionRecord::DELETED_TEXT ) {
380                    $rev['sha1hidden'] = true;
381                    $anyHidden = true;
382                }
383                if ( RevisionRecord::userCanBitfield(
384                    $row->ar_deleted,
385                    RevisionRecord::DELETED_TEXT,
386                    $user
387                ) ) {
388                    if ( $row->ar_sha1 != '' ) {
389                        $rev['sha1'] = \Wikimedia\base_convert( $row->ar_sha1, 36, 16, 40 );
390                    } else {
391                        $rev['sha1'] = '';
392                    }
393                }
394            }
395            if ( $fld_content ) {
396                if ( $row->ar_deleted & RevisionRecord::DELETED_TEXT ) {
397                    $rev['texthidden'] = true;
398                    $anyHidden = true;
399                }
400                if ( RevisionRecord::userCanBitfield(
401                    $row->ar_deleted,
402                    RevisionRecord::DELETED_TEXT,
403                    $user
404                ) ) {
405                    ApiResult::setContentValue( $rev, 'text',
406                        $this->revisionStore->newRevisionFromArchiveRow( $row )
407                            ->getContent( SlotRecord::MAIN )->serialize() );
408                }
409            }
410
411            if ( $fld_tags ) {
412                if ( $row->ts_tags ) {
413                    $tags = explode( ',', $row->ts_tags );
414                    ApiResult::setIndexedTagName( $tags, 'tag' );
415                    $rev['tags'] = $tags;
416                } else {
417                    $rev['tags'] = [];
418                }
419            }
420
421            if ( $anyHidden && ( $row->ar_deleted & RevisionRecord::DELETED_RESTRICTED ) ) {
422                $rev['suppressed'] = true;
423            }
424
425            if ( !isset( $pageMap[$row->ar_namespace][$row->ar_title] ) ) {
426                $pageID = $newPageID++;
427                $pageMap[$row->ar_namespace][$row->ar_title] = $pageID;
428                $a = [ 'revisions' => [ $rev ] ];
429                ApiResult::setIndexedTagName( $a['revisions'], 'rev' );
430                $title = Title::makeTitle( $row->ar_namespace, $row->ar_title );
431                ApiQueryBase::addTitleInfo( $a, $title );
432                if ( $fld_token ) {
433                    // @phan-suppress-next-line PhanPossiblyUndeclaredVariable token is set when used
434                    $a['token'] = $token;
435                }
436                $fit = $result->addValue( [ 'query', $this->getModuleName() ], $pageID, $a );
437            } else {
438                $pageID = $pageMap[$row->ar_namespace][$row->ar_title];
439                $fit = $result->addValue(
440                    [ 'query', $this->getModuleName(), $pageID, 'revisions' ],
441                    null, $rev );
442            }
443            if ( !$fit ) {
444                if ( $mode == 'all' || $mode == 'revs' ) {
445                    $this->setContinueEnumParameter( 'continue',
446                        "$row->ar_namespace|$row->ar_title|$row->ar_timestamp|$row->ar_id"
447                    );
448                } else {
449                    $this->setContinueEnumParameter( 'continue', "$row->ar_timestamp|$row->ar_id" );
450                }
451                break;
452            }
453        }
454        $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'page' );
455    }
456
457    public function isDeprecated() {
458        return true;
459    }
460
461    public function getAllowedParams() {
462        $smallLimit = $this->getMain()->canApiHighLimits() ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_SML1;
463        return [
464            'start' => [
465                ParamValidator::PARAM_TYPE => 'timestamp',
466                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 2 ] ],
467            ],
468            'end' => [
469                ParamValidator::PARAM_TYPE => 'timestamp',
470                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 2 ] ],
471            ],
472            'dir' => [
473                ParamValidator::PARAM_TYPE => [
474                    'newer',
475                    'older'
476                ],
477                ParamValidator::PARAM_DEFAULT => 'older',
478                ApiBase::PARAM_HELP_MSG => 'api-help-param-direction',
479                ApiBase::PARAM_HELP_MSG_PER_VALUE => [
480                    'newer' => 'api-help-paramvalue-direction-newer',
481                    'older' => 'api-help-paramvalue-direction-older',
482                ],
483                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 1, 3 ] ],
484            ],
485            'from' => [
486                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
487            ],
488            'to' => [
489                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
490            ],
491            'prefix' => [
492                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
493            ],
494            'unique' => [
495                ParamValidator::PARAM_DEFAULT => false,
496                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
497            ],
498            'namespace' => [
499                ParamValidator::PARAM_TYPE => 'namespace',
500                ParamValidator::PARAM_DEFAULT => NS_MAIN,
501                ApiBase::PARAM_HELP_MSG_INFO => [ [ 'modes', 3 ] ],
502            ],
503            'tag' => null,
504            'user' => [
505                ParamValidator::PARAM_TYPE => 'user',
506                UserDef::PARAM_ALLOWED_USER_TYPES => [ 'name', 'ip', 'temp', 'id', 'interwiki' ],
507            ],
508            'excludeuser' => [
509                ParamValidator::PARAM_TYPE => 'user',
510                UserDef::PARAM_ALLOWED_USER_TYPES => [ 'name', 'ip', 'temp', 'id', 'interwiki' ],
511            ],
512            'prop' => [
513                ParamValidator::PARAM_DEFAULT => 'user|comment',
514                ParamValidator::PARAM_TYPE => [
515                    'revid',
516                    'parentid',
517                    'user',
518                    'userid',
519                    'comment',
520                    'parsedcomment',
521                    'minor',
522                    'len',
523                    'sha1',
524                    'content',
525                    'token',
526                    'tags'
527                ],
528                ParamValidator::PARAM_ISMULTI => true,
529                ApiBase::PARAM_HELP_MSG_PER_VALUE => [
530                    'content' => [ 'apihelp-query+deletedrevs-paramvalue-prop-content', $smallLimit ],
531                ],
532                EnumDef::PARAM_DEPRECATED_VALUES => [
533                    'token' => true,
534                ],
535            ],
536            'limit' => [
537                ParamValidator::PARAM_DEFAULT => 10,
538                ParamValidator::PARAM_TYPE => 'limit',
539                IntegerDef::PARAM_MIN => 1,
540                IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1,
541                IntegerDef::PARAM_MAX2 => ApiBase::LIMIT_BIG2,
542                ApiBase::PARAM_HELP_MSG => [ 'apihelp-query+deletedrevs-param-limit', $smallLimit ],
543            ],
544            'continue' => [
545                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
546            ],
547        ];
548    }
549
550    protected function getExamplesMessages() {
551        $title = Title::newMainPage();
552        $talkTitle = $title->getTalkPageIfDefined();
553        $examples = [];
554
555        if ( $talkTitle ) {
556            $title = rawurlencode( $title->getPrefixedText() );
557            $talkTitle = rawurlencode( $talkTitle->getPrefixedText() );
558            $examples = [
559                "action=query&list=deletedrevs&titles={$title}|{$talkTitle}&" .
560                    'drprop=user|comment|content'
561                    => 'apihelp-query+deletedrevs-example-mode1',
562            ];
563        }
564
565        return array_merge( $examples, [
566            'action=query&list=deletedrevs&druser=Bob&drlimit=50'
567                => 'apihelp-query+deletedrevs-example-mode2',
568            'action=query&list=deletedrevs&drdir=newer&drlimit=50'
569                => 'apihelp-query+deletedrevs-example-mode3-main',
570            'action=query&list=deletedrevs&drdir=newer&drlimit=50&drnamespace=1&drunique='
571                => 'apihelp-query+deletedrevs-example-mode3-talk',
572        ] );
573    }
574
575    public function getHelpUrls() {
576        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Deletedrevs';
577    }
578}
579
580/** @deprecated class alias since 1.43 */
581class_alias( ApiQueryDeletedrevs::class, 'ApiQueryDeletedrevs' );