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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Class for exposing the parser functions for Cargo to Lua. |
| 5 | * The functions are available via mw.ext.cargo Lua table. |
| 6 | * |
| 7 | * @author Yaron Koren. |
| 8 | * @author Alexander Mashin. |
| 9 | */ |
| 10 | class CargoLuaLibrary extends Scribunto_LuaLibraryBase { |
| 11 | |
| 12 | /** |
| 13 | * Register two Lua bindings: mw.ext.cargo.query and mw.ext.cargo.format |
| 14 | * @return array|null |
| 15 | */ |
| 16 | public function register() { |
| 17 | $lib = [ |
| 18 | 'query' => [ $this, 'cargoQuery' ], |
| 19 | 'format' => [ $this, 'cargoFormat' ] |
| 20 | ]; |
| 21 | return $this->getEngine()->registerInterface( __DIR__ . '/../cargo.lua', $lib, [] ); |
| 22 | } |
| 23 | |
| 24 | /** |
| 25 | * Implementation of mw.ext.cargo.query. |
| 26 | * |
| 27 | * @param string $tables |
| 28 | * @param string $fields |
| 29 | * @param array|null $args |
| 30 | * @return array[] |
| 31 | * @throws MWException |
| 32 | * @throws Scribunto_LuaError |
| 33 | */ |
| 34 | public function cargoQuery( $tables, $fields, $args ): array { |
| 35 | $this->checkType( 'query', 1, $tables, 'string' ); |
| 36 | $this->checkType( 'query', 2, $fields, 'string' ); |
| 37 | $this->checkTypeOptional( 'query', 3, $args, 'table', [] ); |
| 38 | |
| 39 | $where = $args['where'] ?? null; |
| 40 | $join = $args['join'] ?? null; |
| 41 | $groupBy = $args['groupBy'] ?? null; |
| 42 | $having = $args['having'] ?? null; |
| 43 | $orderBy = $args['orderBy'] ?? null; |
| 44 | $limit = $args['limit'] ?? null; |
| 45 | $offset = $args['offset'] ?? null; |
| 46 | |
| 47 | try { |
| 48 | $query = CargoSQLQuery::newFromValues( $tables, $fields, $where, $join, |
| 49 | $groupBy, $having, $orderBy, $limit, $offset ); |
| 50 | $rows = $query->run(); |
| 51 | } catch ( Exception $e ) { |
| 52 | // Allow for error handling within Lua. |
| 53 | throw new Scribunto_LuaError( $e->getMessage() ); |
| 54 | } |
| 55 | |
| 56 | $result = []; |
| 57 | |
| 58 | $fieldArray = CargoUtils::smartSplit( ',', $fields ); |
| 59 | |
| 60 | $rowIndex = 1; // because Lua arrays start at 1 |
| 61 | foreach ( $rows as $row ) { |
| 62 | $values = []; |
| 63 | foreach ( $fieldArray as $fieldString ) { |
| 64 | $alias = $query->getAliasForFieldString( $fieldString ); |
| 65 | if ( !isset( $row[$alias] ) ) { |
| 66 | if ( !$GLOBALS["wgCargoLegacyNullLuaFieldsAsEmptyString"] ) { |
| 67 | continue; |
| 68 | } |
| 69 | $row[$alias] = ""; |
| 70 | } |
| 71 | $nameArray = CargoUtils::smartSplit( '=', $fieldString ); |
| 72 | $name = $nameArray[ count( $nameArray ) - 1 ]; |
| 73 | $values[$name] = htmlspecialchars_decode( $row[$alias] ); |
| 74 | } |
| 75 | $result[$rowIndex++] = $values; |
| 76 | } |
| 77 | |
| 78 | return [ $result ]; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Implementation of mw.ext.cargo.formatTable(). |
| 83 | * |
| 84 | * @param array[] $values A 2D row-based array of associative arrays corresponding to a Lua table. |
| 85 | * @param array $params Parameters, as passed to {{#cargo_query:}}. |
| 86 | * @return array [ [ 0 => string, 'noparse' => bool, 'isHTML' => bool ] ]. |
| 87 | */ |
| 88 | public function cargoFormat( array $values, array $params ): array { |
| 89 | $mappings = []; |
| 90 | $rows = []; |
| 91 | foreach ( self::convertLuaTableToArray( $values ) as $row ) { |
| 92 | if ( is_array( $row ) ) { |
| 93 | $rows[] = $row; |
| 94 | foreach ( $row as $key => $value ) { |
| 95 | if ( !isset( $mappings[$key] ) ) { |
| 96 | $mappings[$key] = $key; |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | return [ |
| 102 | CargoDisplayFormat::formatArray( $this->getParser(), $rows, $mappings, self::convertLuaTableToArray( $params ) ) |
| 103 | ]; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Convert 1-based Lua table to 0-based PHP array. |
| 108 | * |
| 109 | * @param mixed $table |
| 110 | * |
| 111 | * @return mixed |
| 112 | */ |
| 113 | private static function convertLuaTableToArray( $table ) { |
| 114 | if ( is_array( $table ) ) { |
| 115 | $converted = []; |
| 116 | foreach ( $table as $key => $value ) { |
| 117 | if ( is_int( $key ) || is_string( $key ) ) { |
| 118 | $new_key = is_int( $key ) ? $key - 1 : $key; |
| 119 | $converted[$new_key] = self::convertLuaTableToArray( $value ); |
| 120 | } |
| 121 | } |
| 122 | return $converted; |
| 123 | } |
| 124 | return $table; |
| 125 | } |
| 126 | } |