+ return true;
+ }
+
+ /**
+ * Compress the text in chunks after concatenating the revisions.
+ *
+ * @param int $startId
+ * @param int $maxChunkSize
+ * @param string $beginDate
+ * @param string $endDate
+ * @param string $extdb
+ * @param bool|int $maxPageId
+ * @return bool
+ */
+ private function compressWithConcat( $startId, $maxChunkSize, $beginDate,
+ $endDate, $extdb = "", $maxPageId = false
+ ) {
+ $loadStyle = self::LS_CHUNKED;
+
+ $dbr = $this->getDB( DB_REPLICA );
+ $dbw = $this->getDB( DB_MASTER );
+
+ # Set up external storage
+ if ( $extdb != '' ) {
+ $storeObj = new ExternalStoreDB;
+ }
+
+ # Get all articles by page_id
+ if ( !$maxPageId ) {
+ $maxPageId = $dbr->selectField( 'page', 'max(page_id)', '', __METHOD__ );
+ }
+ $this->output( "Starting from $startId of $maxPageId\n" );
+ $pageConds = [];
+
+ /*
+ if ( $exclude_ns0 ) {
+ print "Excluding main namespace\n";
+ $pageConds[] = 'page_namespace<>0';
+ }
+ if ( $queryExtra ) {
+ $pageConds[] = $queryExtra;
+ }
+ */
+
+ # For each article, get a list of revisions which fit the criteria
+
+ # No recompression, use a condition on old_flags
+ # Don't compress object type entities, because that might produce data loss when
+ # overwriting bulk storage concat rows. Don't compress external references, because
+ # the script doesn't yet delete rows from external storage.
+ $conds = [
+ 'old_flags NOT ' . $dbr->buildLike( $dbr->anyString(), 'object', $dbr->anyString() )
+ . ' AND old_flags NOT '
+ . $dbr->buildLike( $dbr->anyString(), 'external', $dbr->anyString() )
+ ];
+
+ if ( $beginDate ) {
+ if ( !preg_match( '/^\d{14}$/', $beginDate ) ) {
+ $this->error( "Invalid begin date \"$beginDate\"\n" );
+
+ return false;
+ }
+ $conds[] = "rev_timestamp>'" . $beginDate . "'";
+ }
+ if ( $endDate ) {
+ if ( !preg_match( '/^\d{14}$/', $endDate ) ) {
+ $this->error( "Invalid end date \"$endDate\"\n" );
+
+ return false;
+ }
+ $conds[] = "rev_timestamp<'" . $endDate . "'";
+ }
+ if ( $loadStyle == self::LS_CHUNKED ) {
+ $tables = [ 'revision', 'text' ];
+ $fields = [ 'rev_id', 'rev_text_id', 'old_flags', 'old_text' ];
+ $conds[] = 'rev_text_id=old_id';
+ $revLoadOptions = 'FOR UPDATE';
+ } else {
+ $tables = [ 'revision' ];
+ $fields = [ 'rev_id', 'rev_text_id' ];
+ $revLoadOptions = [];
+ }
+
+ # Don't work with current revisions
+ # Don't lock the page table for update either -- TS 2006-04-04
+ # $tables[] = 'page';
+ # $conds[] = 'page_id=rev_page AND rev_id != page_latest';
+
+ for ( $pageId = $startId; $pageId <= $maxPageId; $pageId++ ) {
+ wfWaitForSlaves();
+
+ # Wake up
+ $dbr->ping();
+
+ # Get the page row
+ $pageRes = $dbr->select( 'page',
+ [ 'page_id', 'page_namespace', 'page_title', 'page_latest' ],
+ $pageConds + [ 'page_id' => $pageId ], __METHOD__ );
+ if ( $pageRes->numRows() == 0 ) {
+ continue;
+ }
+ $pageRow = $dbr->fetchObject( $pageRes );
+
+ # Display progress
+ $titleObj = Title::makeTitle( $pageRow->page_namespace, $pageRow->page_title );
+ $this->output( "$pageId\t" . $titleObj->getPrefixedDBkey() . " " );
+
+ # Load revisions
+ $revRes = $dbw->select( $tables, $fields,
+ array_merge( [
+ 'rev_page' => $pageRow->page_id,
+ # Don't operate on the current revision
+ # Use < instead of <> in case the current revision has changed
+ # since the page select, which wasn't locking
+ 'rev_id < ' . $pageRow->page_latest
+ ], $conds ),
+ __METHOD__,
+ $revLoadOptions
+ );
+ $revs = [];
+ foreach ( $revRes as $revRow ) {
+ $revs[] = $revRow;
+ }
+
+ if ( count( $revs ) < 2 ) {
+ # No revisions matching, no further processing
+ $this->output( "\n" );
+ continue;
+ }
+
+ # For each chunk
+ $i = 0;
+ while ( $i < count( $revs ) ) {
+ if ( $i < count( $revs ) - $maxChunkSize ) {
+ $thisChunkSize = $maxChunkSize;
+ } else {
+ $thisChunkSize = count( $revs ) - $i;
+ }
+
+ $chunk = new ConcatenatedGzipHistoryBlob();
+ $stubs = [];
+ $this->beginTransaction( $dbw, __METHOD__ );
+ $usedChunk = false;
+ $primaryOldid = $revs[$i]->rev_text_id;
+
+ // @codingStandardsIgnoreStart Ignore avoid function calls in a FOR loop test part warning
+ # Get the text of each revision and add it to the object
+ for ( $j = 0; $j < $thisChunkSize && $chunk->isHappy(); $j++ ) {
+ // @codingStandardsIgnoreEnd
+ $oldid = $revs[$i + $j]->rev_text_id;
+
+ # Get text
+ if ( $loadStyle == self::LS_INDIVIDUAL ) {
+ $textRow = $dbw->selectRow( 'text',
+ [ 'old_flags', 'old_text' ],
+ [ 'old_id' => $oldid ],
+ __METHOD__,
+ 'FOR UPDATE'
+ );
+ $text = Revision::getRevisionText( $textRow );
+ } else {
+ $text = Revision::getRevisionText( $revs[$i + $j] );
+ }
+
+ if ( $text === false ) {
+ $this->error( "\nError, unable to get text in old_id $oldid" );
+ # $dbw->delete( 'old', [ 'old_id' => $oldid ] );
+ }
+
+ if ( $extdb == "" && $j == 0 ) {
+ $chunk->setText( $text );
+ $this->output( '.' );
+ } else {
+ # Don't make a stub if it's going to be longer than the article
+ # Stubs are typically about 100 bytes
+ if ( strlen( $text ) < 120 ) {
+ $stub = false;
+ $this->output( 'x' );
+ } else {
+ $stub = new HistoryBlobStub( $chunk->addItem( $text ) );
+ $stub->setLocation( $primaryOldid );
+ $stub->setReferrer( $oldid );
+ $this->output( '.' );
+ $usedChunk = true;
+ }
+ $stubs[$j] = $stub;
+ }
+ }
+ $thisChunkSize = $j;
+
+ # If we couldn't actually use any stubs because the pages were too small, do nothing
+ if ( $usedChunk ) {
+ if ( $extdb != "" ) {
+ # Move blob objects to External Storage
+ $stored = $storeObj->store( $extdb, serialize( $chunk ) );
+ if ( $stored === false ) {
+ $this->error( "Unable to store object" );
+
+ return false;
+ }
+ # Store External Storage URLs instead of Stub placeholders
+ foreach ( $stubs as $stub ) {
+ if ( $stub === false ) {
+ continue;
+ }
+ # $stored should provide base path to a BLOB
+ $url = $stored . "/" . $stub->getHash();
+ $dbw->update( 'text',
+ [ /* SET */
+ 'old_text' => $url,
+ 'old_flags' => 'external,utf-8',
+ ], [ /* WHERE */
+ 'old_id' => $stub->getReferrer(),
+ ]
+ );
+ }
+ } else {
+ # Store the main object locally
+ $dbw->update( 'text',
+ [ /* SET */
+ 'old_text' => serialize( $chunk ),
+ 'old_flags' => 'object,utf-8',
+ ], [ /* WHERE */
+ 'old_id' => $primaryOldid
+ ]
+ );
+
+ # Store the stub objects
+ for ( $j = 1; $j < $thisChunkSize; $j++ ) {
+ # Skip if not compressing and don't overwrite the first revision
+ if ( $stubs[$j] !== false && $revs[$i + $j]->rev_text_id != $primaryOldid ) {
+ $dbw->update( 'text',
+ [ /* SET */
+ 'old_text' => serialize( $stubs[$j] ),
+ 'old_flags' => 'object,utf-8',
+ ], [ /* WHERE */
+ 'old_id' => $revs[$i + $j]->rev_text_id
+ ]
+ );
+ }
+ }
+ }
+ }
+ # Done, next
+ $this->output( "/" );
+ $this->commitTransaction( $dbw, __METHOD__ );
+ $i += $thisChunkSize;
+ wfWaitForSlaves();
+ }
+ $this->output( "\n" );
+ }
+
+ return true;
+ }
+}