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| 1 | <?php |
| 2 | |
| 3 | namespace PropertySuggester\UpdateTable\Importer; |
| 4 | |
| 5 | use PropertySuggester\UpdateTable\ImportContext; |
| 6 | use UnexpectedValueException; |
| 7 | use Wikimedia\Rdbms\IDatabase; |
| 8 | use Wikimedia\Rdbms\ILBFactory; |
| 9 | |
| 10 | /** |
| 11 | * A strategy which imports entries from a CSV file into a DB table. Used as fallback, when no |
| 12 | * special import commands are supported by the DBMS. |
| 13 | * |
| 14 | * @author BP2013N2 |
| 15 | * @license GPL-2.0-or-later |
| 16 | */ |
| 17 | class BasicImporter implements Importer { |
| 18 | |
| 19 | /** |
| 20 | * Import using SQL Insert |
| 21 | * @param ImportContext $importContext |
| 22 | * @return bool |
| 23 | */ |
| 24 | public function importFromCsvFileToDb( ImportContext $importContext ) { |
| 25 | $fileHandle = fopen( $importContext->getCsvFilePath(), "r" ); |
| 26 | if ( $fileHandle == false ) { |
| 27 | return false; |
| 28 | } |
| 29 | |
| 30 | $lbFactory = $importContext->getLbFactory(); |
| 31 | $lb = $lbFactory->getMainLB(); |
| 32 | $db = $lb->getConnection( DB_PRIMARY ); |
| 33 | $this->doImport( $fileHandle, $lbFactory, $db, $importContext ); |
| 34 | fclose( $fileHandle ); |
| 35 | |
| 36 | return true; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * @param resource $fileHandle |
| 41 | * @param ILBFactory $lbFactory |
| 42 | * @param IDatabase $db |
| 43 | * @param ImportContext $importContext |
| 44 | * @throws UnexpectedValueException |
| 45 | * @suppress SecurityCheck-SQLInjection ImportContext::getTargetTableName is marked as unsafe |
| 46 | */ |
| 47 | private function doImport( |
| 48 | $fileHandle, |
| 49 | ILBFactory $lbFactory, |
| 50 | IDatabase $db, |
| 51 | ImportContext $importContext |
| 52 | ) { |
| 53 | $accumulator = []; |
| 54 | $batchSize = $importContext->getBatchSize(); |
| 55 | $i = 0; |
| 56 | $header = fgetcsv( $fileHandle, 0, $importContext->getCsvDelimiter() ); |
| 57 | $expectedHeader = [ 'pid1', 'qid1', 'pid2', 'count', 'probability', 'context' ]; |
| 58 | if ( $header != $expectedHeader ) { |
| 59 | throw new UnexpectedValueException( |
| 60 | "provided csv-file does not match the expected format:\n" . |
| 61 | implode( ',', $expectedHeader ) |
| 62 | ); |
| 63 | } |
| 64 | |
| 65 | while ( true ) { |
| 66 | $data = fgetcsv( $fileHandle, 0, $importContext->getCsvDelimiter() ); |
| 67 | |
| 68 | if ( $data == false || ++$i % $batchSize == 0 ) { |
| 69 | $db->commit( __METHOD__, 'flush' ); |
| 70 | $lbFactory->waitForReplication(); |
| 71 | $db->newInsertQueryBuilder() |
| 72 | ->insertInto( $importContext->getTargetTableName() ) |
| 73 | ->rows( $accumulator ) |
| 74 | ->caller( __METHOD__ ) |
| 75 | ->execute(); |
| 76 | if ( !$importContext->isQuiet() ) { |
| 77 | print "$i rows inserted\n"; |
| 78 | } |
| 79 | $accumulator = []; |
| 80 | if ( $data == false ) { |
| 81 | break; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | $qid1 = is_numeric( $data[1] ) ? $data[1] : 0; |
| 86 | |
| 87 | $accumulator[] = [ |
| 88 | 'pid1' => $data[0], |
| 89 | 'qid1' => $qid1, |
| 90 | 'pid2' => $data[2], |
| 91 | 'count' => $data[3], |
| 92 | 'probability' => $data[4], |
| 93 | 'context' => $data[5], |
| 94 | ]; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | } |