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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\DiscussionTools; |
| 4 | |
| 5 | use LogicException; |
| 6 | use MediaWiki\Html\HtmlHelper; |
| 7 | use Wikimedia\RemexHtml\Serializer\SerializerNode; |
| 8 | |
| 9 | class BatchModifyElements { |
| 10 | /** @var array<array{callable, callable}> */ |
| 11 | private array $modifications = []; |
| 12 | |
| 13 | /** |
| 14 | * Add a modification to the queue. |
| 15 | * |
| 16 | * @param callable $shouldModifyCallback |
| 17 | * @param callable $modifyCallback |
| 18 | */ |
| 19 | public function add( callable $shouldModifyCallback, callable $modifyCallback ): void { |
| 20 | $this->modifications[] = [ $shouldModifyCallback, $modifyCallback ]; |
| 21 | } |
| 22 | |
| 23 | /** |
| 24 | * Apply all modifications to a fragment. |
| 25 | * |
| 26 | * @param string $htmlFragment |
| 27 | * @param bool $html5format |
| 28 | * @return string |
| 29 | */ |
| 30 | public function apply( string $htmlFragment, bool $html5format = true ): string { |
| 31 | if ( !count( $this->modifications ) ) { |
| 32 | return $htmlFragment; |
| 33 | } |
| 34 | |
| 35 | return HtmlHelper::modifyElements( |
| 36 | $htmlFragment, |
| 37 | function ( SerializerNode $node ) { |
| 38 | foreach ( $this->modifications as [ $shouldModify, $modify ] ) { |
| 39 | if ( $shouldModify( $node ) ) { |
| 40 | return true; |
| 41 | } |
| 42 | } |
| 43 | return false; |
| 44 | }, |
| 45 | function ( SerializerNode $node ) { |
| 46 | $modified = null; |
| 47 | foreach ( $this->modifications as [ $shouldModify, $modify ] ) { |
| 48 | if ( $shouldModify( $node ) ) { |
| 49 | if ( !$modified ) { |
| 50 | $modified = $modify( $node ); |
| 51 | } else { |
| 52 | // Ideally we would support matching mulitple modifiers, but as a modifier |
| 53 | // can return a string but has to be passed a SerizliazerNode, this is |
| 54 | // not trivial. |
| 55 | throw new LogicException( 'Node matches multiple modifiers.' ); |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | return $modified ?? $node; |
| 60 | }, |
| 61 | $html5format |
| 62 | ); |
| 63 | } |
| 64 | } |