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| 1 | <?php |
| 2 | /** |
| 3 | * An interface to delete a "Cargo table", which can be one or more real |
| 4 | * database tables. |
| 5 | * |
| 6 | * @author Yaron Koren |
| 7 | * @ingroup Cargo |
| 8 | */ |
| 9 | |
| 10 | class SpecialDeleteCargoTable extends UnlistedSpecialPage { |
| 11 | |
| 12 | public function __construct() { |
| 13 | parent::__construct( 'DeleteCargoTable', 'deletecargodata' ); |
| 14 | } |
| 15 | |
| 16 | public function doesWrites() { |
| 17 | return true; |
| 18 | } |
| 19 | |
| 20 | /** |
| 21 | * The table being deleted here is a Cargo table, not a DB table per |
| 22 | * se - a Cargo table corresponds to a main DB table, plus |
| 23 | * potentially one or more helper tables; all need to be deleted. |
| 24 | * Also, records need to be removed from the cargo_tables and |
| 25 | * cargo_pages tables. |
| 26 | */ |
| 27 | public static function deleteTable( $mainTable, $fieldTables, $fieldHelperTables ) { |
| 28 | $cdb = CargoUtils::getDB(); |
| 29 | try { |
| 30 | $cdb->begin(); |
| 31 | foreach ( $fieldTables as $fieldTable ) { |
| 32 | $cdb->dropTable( $fieldTable ); |
| 33 | } |
| 34 | if ( is_array( $fieldHelperTables ) ) { |
| 35 | foreach ( $fieldHelperTables as $fieldHelperTable ) { |
| 36 | $cdb->dropTable( $fieldHelperTable ); |
| 37 | } |
| 38 | } |
| 39 | $cdb->dropTable( $mainTable ); |
| 40 | $cdb->commit(); |
| 41 | } catch ( Exception $e ) { |
| 42 | throw new MWException( "Caught exception ($e) while trying to drop Cargo table. " |
| 43 | . "Please make sure that your database user account has the DROP permission." ); |
| 44 | } |
| 45 | |
| 46 | $dbw = CargoUtils::getMainDBForWrite(); |
| 47 | $dbw->delete( 'cargo_tables', [ 'main_table' => $mainTable ] ); |
| 48 | $dbw->delete( 'cargo_pages', [ 'table_name' => $mainTable ] ); |
| 49 | } |
| 50 | |
| 51 | public function execute( $subpage = false ) { |
| 52 | $this->checkPermissions(); |
| 53 | |
| 54 | $out = $this->getOutput(); |
| 55 | $req = $this->getRequest(); |
| 56 | |
| 57 | $out->enableOOUI(); |
| 58 | |
| 59 | $this->setHeaders(); |
| 60 | if ( $subpage == '' ) { |
| 61 | CargoUtils::displayErrorMessage( $out, $this->msg( "cargo-notable" ) ); |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | $replacementTable = $req->getCheck( '_replacement' ); |
| 66 | $origTableName = $subpage; |
| 67 | if ( $replacementTable ) { |
| 68 | $tableName = $subpage . '__NEXT'; |
| 69 | } else { |
| 70 | $tableName = $subpage; |
| 71 | } |
| 72 | |
| 73 | // Make sure that this table exists. |
| 74 | $dbr = CargoUtils::getMainDBForRead(); |
| 75 | $res = $dbr->select( 'cargo_tables', [ 'main_table', 'field_tables', 'field_helper_tables' ], |
| 76 | [ 'main_table' => $tableName ] ); |
| 77 | if ( $res->numRows() == 0 ) { |
| 78 | CargoUtils::displayErrorMessage( $out, $this->msg( "cargo-unknowntable", $tableName ) ); |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | $ctPage = CargoUtils::getSpecialPage( 'CargoTables' ); |
| 83 | $row = $res->fetchRow(); |
| 84 | $fieldTables = unserialize( $row['field_tables'] ); |
| 85 | $fieldHelperTables = unserialize( $row['field_helper_tables'] ); |
| 86 | |
| 87 | if ( $this->getRequest()->getCheck( 'delete' ) ) { |
| 88 | self::deleteTable( $tableName, $fieldTables, $fieldHelperTables ); |
| 89 | $text = Html::element( 'p', null, $this->msg( 'cargo-deletetable-success', $tableName )->parse() ) . "\n"; |
| 90 | $tablesLink = CargoUtils::makeLink( $this->getLinkRenderer(), |
| 91 | $ctPage->getPageTitle(), |
| 92 | htmlspecialchars( $ctPage->getDescription() ) ); |
| 93 | $text .= Html::rawElement( 'p', null, $this->msg( 'returnto', $tablesLink )->text() ); |
| 94 | $out->addHTML( $text ); |
| 95 | if ( !$replacementTable ) { |
| 96 | CargoUtils::logTableAction( 'deletetable', $tableName, $this->getUser() ); |
| 97 | } |
| 98 | return true; |
| 99 | } |
| 100 | |
| 101 | $ctURL = $ctPage->getPageTitle()->getFullURL(); |
| 102 | $tableLink = "[$ctURL/$origTableName $origTableName]"; |
| 103 | |
| 104 | if ( $replacementTable ) { |
| 105 | $replacementTableURL = "$ctURL/$origTableName"; |
| 106 | $replacementTableURL .= ( strpos( $replacementTableURL, '?' ) ) ? '&' : '?'; |
| 107 | $replacementTableURL .= '_replacement'; |
| 108 | $text = Html::rawElement( 'p', |
| 109 | [ 'class' => 'plainlinks' ], |
| 110 | $this->msg( 'cargo-deletetable-replacementconfirm', $replacementTableURL, $tableLink )->parse() |
| 111 | ); |
| 112 | } else { |
| 113 | $text = Html::rawElement( 'p', |
| 114 | [ 'class' => 'plainlinks' ], |
| 115 | $this->msg( 'cargo-deletetable-confirm', $tableLink )->parse() |
| 116 | ); |
| 117 | } |
| 118 | $out->addHTML( $text ); |
| 119 | |
| 120 | $htmlForm = HTMLForm::factory( 'ooui', [], $this->getContext() ); |
| 121 | |
| 122 | if ( $replacementTable ) { |
| 123 | $htmlForm = $htmlForm->addHiddenField( '_replacement', '' ); |
| 124 | } |
| 125 | |
| 126 | $htmlForm |
| 127 | ->setSubmitName( 'delete' ) |
| 128 | ->setSubmitTextMsg( 'delete' ) |
| 129 | ->setSubmitDestructive() |
| 130 | ->prepareForm() |
| 131 | ->displayForm( false ); |
| 132 | |
| 133 | return true; |
| 134 | } |
| 135 | } |