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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Maintenance; |
| 4 | |
| 5 | use Flow\Container; |
| 6 | use Flow\DbFactory; |
| 7 | use Flow\Hooks; |
| 8 | use Flow\Import\ArchiveNameHelper; |
| 9 | use Maintenance; |
| 10 | use MediaWiki\Revision\RevisionRecord; |
| 11 | use MediaWiki\Revision\SlotRecord; |
| 12 | use MediaWiki\Status\Status; |
| 13 | use MediaWiki\Title\Title; |
| 14 | use MediaWiki\User\ActorMigration; |
| 15 | use MediaWiki\User\User; |
| 16 | |
| 17 | $IP = getenv( 'MW_INSTALL_PATH' ); |
| 18 | if ( $IP === false ) { |
| 19 | $IP = __DIR__ . '/../../..'; |
| 20 | } |
| 21 | |
| 22 | require_once "$IP/maintenance/Maintenance.php"; |
| 23 | |
| 24 | class FlowRestoreLQT extends Maintenance { |
| 25 | /** |
| 26 | * @var User |
| 27 | */ |
| 28 | protected $talkpageManagerUser; |
| 29 | |
| 30 | /** |
| 31 | * @var DbFactory |
| 32 | */ |
| 33 | protected $dbFactory; |
| 34 | |
| 35 | /** |
| 36 | * @var bool |
| 37 | */ |
| 38 | protected $dryRun = false; |
| 39 | |
| 40 | /** |
| 41 | * @var bool |
| 42 | */ |
| 43 | protected $overwrite = false; |
| 44 | |
| 45 | public function __construct() { |
| 46 | parent::__construct(); |
| 47 | |
| 48 | $this->addDescription( 'Restores LQT boards after a Flow conversion (revert LQT conversion ' . |
| 49 | 'edits & move LQT boards back)' ); |
| 50 | |
| 51 | $this->addOption( 'dryrun', 'Simulate script run, without making actual changes' ); |
| 52 | $this->addOption( 'overwrite-flow', 'Removes the Flow board entirely, restoring LQT to ' . |
| 53 | 'its original location' ); |
| 54 | |
| 55 | $this->setBatchSize( 1 ); |
| 56 | |
| 57 | $this->requireExtension( 'Flow' ); |
| 58 | } |
| 59 | |
| 60 | public function execute() { |
| 61 | $this->talkpageManagerUser = Hooks::getOccupationController()->getTalkpageManager(); |
| 62 | $this->dbFactory = Container::get( 'db.factory' ); |
| 63 | $this->dryRun = $this->getOption( 'dryrun', false ); |
| 64 | $this->overwrite = $this->getOption( 'overwrite-flow', false ); |
| 65 | |
| 66 | $this->output( "Restoring posts...\n" ); |
| 67 | $this->restoreLQTThreads(); |
| 68 | |
| 69 | $this->output( "Restoring boards...\n" ); |
| 70 | $this->restoreLQTBoards(); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * During an import, LQT boards are moved out of the way (archived) to make |
| 75 | * place for the Flow board. |
| 76 | * And after completing an import, LQT boards are disabled with |
| 77 | * {{#useliquidthreads:0}} |
| 78 | * That's all perfectly fine assuming the conversion goes well, but we'll |
| 79 | * want to go back to the original content with this script... |
| 80 | */ |
| 81 | protected function restoreLQTBoards() { |
| 82 | $dbr = $this->dbFactory->getWikiDB( DB_REPLICA ); |
| 83 | $batchSize = $this->getBatchSize(); |
| 84 | |
| 85 | $revWhere = ActorMigration::newMigration() |
| 86 | ->getWhere( $dbr, 'rev_user', $this->talkpageManagerUser ); |
| 87 | |
| 88 | $lbFactory = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
| 89 | |
| 90 | foreach ( $revWhere['orconds'] as $revCond ) { |
| 91 | $startId = 0; |
| 92 | do { |
| 93 | // fetch all LQT boards that have been moved out of the way, |
| 94 | // with their original title & their current title |
| 95 | $rows = $dbr->select( |
| 96 | [ 'logging', 'page', 'revision' ] + $revWhere['tables'], |
| 97 | // log_namespace & log_title will be the original location |
| 98 | // page_namespace & page_title will be the current location |
| 99 | // rev_id is the first Flow talk page manager edit id |
| 100 | // log_id is the log entry for when importer moved LQT page |
| 101 | [ 'log_namespace', 'log_title', 'page_id', 'page_namespace', 'page_title', |
| 102 | 'rev_id' => 'MIN(rev_id)', 'log_id' ], |
| 103 | [ |
| 104 | 'log_actor' => $this->talkpageManagerUser->getActorId(), |
| 105 | 'log_type' => 'move', |
| 106 | 'page_content_model' => 'wikitext', |
| 107 | 'page_id > ' . $dbr->addQuotes( $startId ), |
| 108 | $revCond, |
| 109 | ], |
| 110 | __METHOD__, |
| 111 | [ |
| 112 | 'GROUP BY' => 'rev_page', |
| 113 | 'LIMIT' => $batchSize, |
| 114 | 'ORDER BY' => 'log_id ASC', |
| 115 | ], |
| 116 | [ |
| 117 | 'page' => [ |
| 118 | 'INNER JOIN', |
| 119 | [ 'page_id = log_page' ], |
| 120 | ], |
| 121 | 'revision' => [ |
| 122 | 'INNER JOIN', |
| 123 | [ 'rev_page = log_page' ], |
| 124 | ], |
| 125 | ] + $revWhere['joins'] |
| 126 | ); |
| 127 | |
| 128 | foreach ( $rows as $row ) { |
| 129 | $from = Title::newFromText( $row->page_title, $row->page_namespace ); |
| 130 | $to = Title::newFromText( $row->log_title, $row->log_namespace ); |
| 131 | |
| 132 | // undo {{#useliquidthreads:0}} |
| 133 | $this->restorePageRevision( $row->page_id, $row->rev_id ); |
| 134 | // undo page move to archive location |
| 135 | $this->restoreLQTPage( $from, $to, $row->log_id ); |
| 136 | |
| 137 | $startId = $row->page_id; |
| 138 | } |
| 139 | |
| 140 | $lbFactory->waitForReplication(); |
| 141 | } while ( $rows->numRows() >= $batchSize ); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * After converting an LQT thread to Flow, it's content is altered to |
| 147 | * redirect to the new Flow topic. |
| 148 | * This finds all last original revisions & restores them. |
| 149 | */ |
| 150 | protected function restoreLQTThreads() { |
| 151 | $dbr = $this->dbFactory->getWikiDB( DB_REPLICA ); |
| 152 | $batchSize = $this->getBatchSize(); |
| 153 | |
| 154 | $revWhere = ActorMigration::newMigration() |
| 155 | ->getWhere( $dbr, 'rev_user', $this->talkpageManagerUser ); |
| 156 | |
| 157 | $lbFactory = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
| 158 | |
| 159 | foreach ( $revWhere['orconds'] as $revCond ) { |
| 160 | $startId = 0; |
| 161 | do { |
| 162 | // for every LQT post, find the first edit by Flow talk page manager |
| 163 | // (to redirect to the new Flow copy) |
| 164 | $rows = $dbr->select( |
| 165 | [ 'page', 'revision' ] + $revWhere['tables'], |
| 166 | [ 'rev_page', 'rev_id' => ' MIN(rev_id)' ], |
| 167 | [ |
| 168 | 'page_namespace' => [ NS_LQT_THREAD, NS_LQT_SUMMARY ], |
| 169 | $revCond, |
| 170 | 'page_id > ' . $dbr->addQuotes( $startId ), |
| 171 | ], |
| 172 | __METHOD__, |
| 173 | [ |
| 174 | 'GROUP BY' => 'page_id', |
| 175 | 'LIMIT' => $batchSize, |
| 176 | 'ORDER BY' => 'page_id ASC', |
| 177 | ], |
| 178 | [ |
| 179 | 'revision' => [ |
| 180 | 'INNER JOIN', |
| 181 | [ 'rev_page = page_id' ], |
| 182 | ], |
| 183 | ] + $revWhere['joins'] |
| 184 | ); |
| 185 | |
| 186 | foreach ( $rows as $row ) { |
| 187 | // undo #REDIRECT edit |
| 188 | $this->restorePageRevision( $row->rev_page, $row->rev_id ); |
| 189 | $startId = $row->rev_page; |
| 190 | } |
| 191 | |
| 192 | $lbFactory->waitForReplication(); |
| 193 | } while ( $rows->numRows() >= $batchSize ); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * @param Title $lqt Title of the LQT board |
| 199 | * @param Title $flow Title of the Flow board |
| 200 | * @param int $logId Log id for when LQT board was moved by import |
| 201 | * @return Status |
| 202 | */ |
| 203 | protected function restoreLQTPage( Title $lqt, Title $flow, $logId ) { |
| 204 | if ( $lqt->equals( $flow ) ) { |
| 205 | // is at correct location already (probably a rerun of this script) |
| 206 | return Status::newGood(); |
| 207 | } |
| 208 | |
| 209 | $archiveNameHelper = new ArchiveNameHelper(); |
| 210 | |
| 211 | if ( !$flow->exists() ) { |
| 212 | $this->movePage( $lqt, $flow, '/* Restore LQT board to original location */' ); |
| 213 | } else { |
| 214 | /* |
| 215 | * The importer will query the log table to find the LQT archive |
| 216 | * location. It will assume that Flow talk page manager moved the |
| 217 | * LQT board to its archive location, and will not recognize the |
| 218 | * board if it's been moved by someone else. |
| 219 | * Because of that feature (yes, that is intended), we need to make |
| 220 | * sure that - in order to enable LQT imports to be picked up again |
| 221 | * after this - the move from <original page> to <archive page> |
| 222 | * happens in 1 go, by Flow talk page manager. |
| 223 | */ |
| 224 | if ( !$this->overwrite ) { |
| 225 | /* |
| 226 | * Before we go moving pages around like crazy, let's see if we |
| 227 | * actually need to. While it's certainly possible that the LQT |
| 228 | * pages have been moved since the import and we need to fix |
| 229 | * them, it's very likely that they haven't. In that case, we |
| 230 | * won't have to do the complex moves. |
| 231 | */ |
| 232 | $dbr = $this->dbFactory->getWikiDB( DB_REPLICA ); |
| 233 | $count = $dbr->selectRowCount( |
| 234 | [ 'logging' ], |
| 235 | '*', |
| 236 | [ |
| 237 | 'log_page' => $lqt->getArticleID(), |
| 238 | 'log_type' => 'move', |
| 239 | 'log_id > ' . $dbr->addQuotes( $logId ), |
| 240 | ], |
| 241 | __METHOD__ |
| 242 | ); |
| 243 | |
| 244 | if ( $count > 0 ) { |
| 245 | $this->output( "Ensuring LQT board '{$lqt->getPrefixedDBkey()}' is " . |
| 246 | "recognized as archive of Flow board '{$flow->getPrefixedDBkey()}'.\n" ); |
| 247 | |
| 248 | // 1: move Flow board out of the way so we can restore LQT to |
| 249 | // its original location |
| 250 | $archive = $archiveNameHelper->decideArchiveTitle( $flow, [ '%s/Flow Archive %d' ] ); |
| 251 | $this->movePage( $flow, $archive, '/* Make place to restore LQT board */' ); |
| 252 | |
| 253 | // 2: move LQT board to the original location |
| 254 | $this->movePage( $lqt, $flow, '/* Restore LQT board to original location */' ); |
| 255 | |
| 256 | // 3: move LQT board back to archive location |
| 257 | $this->movePage( $flow, $lqt, '/* Restore LQT board to archive location */' ); |
| 258 | |
| 259 | // 4: move Flow board back to the original location |
| 260 | $this->movePage( $archive, $flow, '/* Restore Flow board to correct location */' ); |
| 261 | } |
| 262 | } else { |
| 263 | $this->output( "Deleting '{$flow->getPrefixedDBkey()}' & moving " . |
| 264 | "'{$lqt->getPrefixedDBkey()}' there.\n" ); |
| 265 | |
| 266 | if ( !$this->dryRun ) { |
| 267 | $page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $flow ); |
| 268 | $page->doDeleteArticleReal( |
| 269 | '/* Make place to restore LQT board */', |
| 270 | $this->talkpageManagerUser, |
| 271 | false, |
| 272 | null, |
| 273 | $error, |
| 274 | null, |
| 275 | [], |
| 276 | 'delete', |
| 277 | true |
| 278 | ); |
| 279 | } |
| 280 | |
| 281 | $this->movePage( $lqt, $flow, '/* Restore LQT board to original location */' ); |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * @param Title $from |
| 288 | * @param Title $to |
| 289 | * @param string $reason |
| 290 | * @return Status |
| 291 | */ |
| 292 | protected function movePage( Title $from, Title $to, $reason ) { |
| 293 | $this->output( " Moving '{$from->getPrefixedDBkey()}' to '{$to->getPrefixedDBkey()}'.\n" ); |
| 294 | |
| 295 | $movePage = $this->getServiceContainer() |
| 296 | ->getMovePageFactory() |
| 297 | ->newMovePage( $from, $to ); |
| 298 | $status = $movePage->isValidMove(); |
| 299 | if ( !$status->isGood() ) { |
| 300 | return $status; |
| 301 | } |
| 302 | |
| 303 | if ( $this->dryRun ) { |
| 304 | return Status::newGood(); |
| 305 | } |
| 306 | |
| 307 | return $movePage->move( $this->talkpageManagerUser, $reason, false ); |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * @param int $pageId |
| 312 | * @param int $nextRevisionId Revision of the first *bad* revision |
| 313 | * @return Status |
| 314 | */ |
| 315 | protected function restorePageRevision( $pageId, $nextRevisionId ) { |
| 316 | global $wgLang; |
| 317 | |
| 318 | $page = $this->getServiceContainer()->getWikiPageFactory()->newFromID( $pageId ); |
| 319 | $revisionLookup = $this->getServiceContainer()->getRevisionLookup(); |
| 320 | $nextRevision = $revisionLookup->getRevisionById( $nextRevisionId ); |
| 321 | $revision = $revisionLookup->getPreviousRevision( $nextRevision ); |
| 322 | $mainContent = $revision->getContent( SlotRecord::MAIN, RevisionRecord::RAW ); |
| 323 | '@phan-var \Content $mainContent'; |
| 324 | |
| 325 | if ( $page->getContent()->equals( $mainContent ) ) { |
| 326 | // has correct content already (probably a rerun of this script) |
| 327 | return Status::newGood(); |
| 328 | } |
| 329 | |
| 330 | $content = $mainContent->serialize(); |
| 331 | $content = $wgLang->truncateForVisual( $content, 150 ); |
| 332 | $content = str_replace( "\n", '\n', $content ); |
| 333 | $this->output( "Restoring revision {$revision->getId()} for LQT page {$pageId}: {$content}\n" ); |
| 334 | |
| 335 | if ( $this->dryRun ) { |
| 336 | return Status::newGood(); |
| 337 | } else { |
| 338 | return $page->doUserEditContent( |
| 339 | $mainContent, |
| 340 | $this->talkpageManagerUser, |
| 341 | '/* Restore LQT topic content */', |
| 342 | EDIT_UPDATE | EDIT_MINOR | EDIT_FORCE_BOT, |
| 343 | $revision->getId() |
| 344 | ); |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | $maintClass = FlowRestoreLQT::class; |
| 350 | require_once RUN_MAINTENANCE_IF_MAIN; |