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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © 2010 Derk-Jan Hartman <hartman@videolan.org> |
| 4 | * |
| 5 | * @license GPL-2.0-or-later |
| 6 | * @file |
| 7 | */ |
| 8 | |
| 9 | namespace MediaWiki\Specials; |
| 10 | |
| 11 | use MediaWiki\Content\IContentHandlerFactory; |
| 12 | use MediaWiki\Diff\DifferenceEngine; |
| 13 | use MediaWiki\HTMLForm\HTMLForm; |
| 14 | use MediaWiki\Revision\RevisionLookup; |
| 15 | use MediaWiki\Revision\RevisionRecord; |
| 16 | use MediaWiki\Revision\SlotRecord; |
| 17 | use MediaWiki\SpecialPage\SpecialPage; |
| 18 | use MediaWiki\Title\Title; |
| 19 | |
| 20 | /** |
| 21 | * Implements Special:ComparePages |
| 22 | * |
| 23 | * @ingroup SpecialPage |
| 24 | */ |
| 25 | class SpecialComparePages extends SpecialPage { |
| 26 | |
| 27 | /** @var DifferenceEngine */ |
| 28 | private $differenceEngine; |
| 29 | |
| 30 | public function __construct( |
| 31 | private readonly RevisionLookup $revisionLookup, |
| 32 | private readonly IContentHandlerFactory $contentHandlerFactory |
| 33 | ) { |
| 34 | parent::__construct( 'ComparePages' ); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Show a form for filtering namespace and username |
| 39 | * |
| 40 | * @param string|null $par |
| 41 | */ |
| 42 | public function execute( $par ) { |
| 43 | $this->setHeaders(); |
| 44 | $this->outputHeader(); |
| 45 | $this->getOutput()->addModuleStyles( 'mediawiki.special' ); |
| 46 | $this->addHelpLink( 'Help:Diff' ); |
| 47 | |
| 48 | $form = HTMLForm::factory( 'ooui', [ |
| 49 | 'Page1' => [ |
| 50 | 'type' => 'title', |
| 51 | 'exists' => true, |
| 52 | 'name' => 'page1', |
| 53 | 'label-message' => 'compare-page1', |
| 54 | 'size' => '40', |
| 55 | 'section' => 'page1', |
| 56 | 'required' => false, |
| 57 | ], |
| 58 | 'Revision1' => [ |
| 59 | 'type' => 'int', |
| 60 | 'name' => 'rev1', |
| 61 | 'label-message' => 'compare-rev1', |
| 62 | 'size' => '8', |
| 63 | 'section' => 'page1', |
| 64 | 'validation-callback' => $this->checkExistingRevision( ... ), |
| 65 | ], |
| 66 | 'Page2' => [ |
| 67 | 'type' => 'title', |
| 68 | 'name' => 'page2', |
| 69 | 'exists' => true, |
| 70 | 'label-message' => 'compare-page2', |
| 71 | 'size' => '40', |
| 72 | 'section' => 'page2', |
| 73 | 'required' => false, |
| 74 | ], |
| 75 | 'Revision2' => [ |
| 76 | 'type' => 'int', |
| 77 | 'name' => 'rev2', |
| 78 | 'label-message' => 'compare-rev2', |
| 79 | 'size' => '8', |
| 80 | 'section' => 'page2', |
| 81 | 'validation-callback' => $this->checkExistingRevision( ... ), |
| 82 | ], |
| 83 | 'Action' => [ |
| 84 | 'type' => 'hidden', |
| 85 | 'name' => 'action', |
| 86 | ], |
| 87 | 'Unhide' => [ |
| 88 | 'type' => 'hidden', |
| 89 | 'name' => 'unhide', |
| 90 | ], |
| 91 | ], $this->getContext(), 'compare' ); |
| 92 | |
| 93 | $form->setMethod( 'get' ) |
| 94 | ->setSubmitTextMsg( 'compare-submit' ) |
| 95 | ->setSubmitCallback( $this->showDiff( ... ) ) |
| 96 | ->show(); |
| 97 | |
| 98 | if ( $this->differenceEngine ) { |
| 99 | $this->differenceEngine->showDiffPage( true ); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * @param array $data |
| 105 | * @param HTMLForm $form |
| 106 | */ |
| 107 | private function showDiff( $data, HTMLForm $form ) { |
| 108 | $rev1 = $this->revOrTitle( $data['Revision1'], $data['Page1'] ); |
| 109 | $rev2 = $this->revOrTitle( $data['Revision2'], $data['Page2'] ); |
| 110 | |
| 111 | if ( $rev1 && $rev2 ) { |
| 112 | // Revision IDs either passed the existence check or were fetched from existing titles. |
| 113 | $revisionRecord = $this->revisionLookup->getRevisionById( $rev1 ); |
| 114 | $contentModel = $revisionRecord->getSlot( |
| 115 | SlotRecord::MAIN, |
| 116 | RevisionRecord::RAW |
| 117 | )->getModel(); |
| 118 | $contentHandler = $this->contentHandlerFactory->getContentHandler( $contentModel ); |
| 119 | $this->differenceEngine = $contentHandler->createDifferenceEngine( $form->getContext(), |
| 120 | $rev1, |
| 121 | $rev2, |
| 122 | 0, // rcid |
| 123 | ( $data['Action'] == 'purge' ), |
| 124 | ( $data['Unhide'] == '1' ) |
| 125 | ); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | private function revOrTitle( ?string $revision, ?string $title ): ?int { |
| 130 | if ( $revision ) { |
| 131 | return (int)$revision; |
| 132 | } elseif ( $title ) { |
| 133 | return Title::newFromText( $title )->getLatestRevID(); |
| 134 | } |
| 135 | |
| 136 | return null; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * @param string|null $value |
| 141 | * @param array $alldata |
| 142 | * @return string|bool |
| 143 | */ |
| 144 | private function checkExistingRevision( $value, $alldata ) { |
| 145 | if ( $value === '' || $value === null ) { |
| 146 | return true; |
| 147 | } |
| 148 | $revisionRecord = $this->revisionLookup->getRevisionById( (int)$value ); |
| 149 | if ( $revisionRecord === null ) { |
| 150 | return $this->msg( 'compare-revision-not-exists' )->parseAsBlock(); |
| 151 | } |
| 152 | |
| 153 | return true; |
| 154 | } |
| 155 | |
| 156 | /** @inheritDoc */ |
| 157 | protected function getGroupName() { |
| 158 | return 'pagetools'; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /** @deprecated class alias since 1.41 */ |
| 163 | class_alias( SpecialComparePages::class, 'SpecialComparePages' ); |