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| 1 | <?php |
| 2 | |
| 3 | use MediaWiki\Extension\Math\MathSource; |
| 4 | use MediaWiki\MediaWikiServices; |
| 5 | use MediaWiki\Revision\RevisionRecord; |
| 6 | use MediaWiki\Revision\SlotRecord; |
| 7 | |
| 8 | class MathIdGenerator { |
| 9 | |
| 10 | public const CONTENT_POS = 1; |
| 11 | public const ATTRIB_POS = 2; |
| 12 | |
| 13 | private string $wikiText; |
| 14 | private array $mathTags; |
| 15 | private int $revisionId; |
| 16 | /** @var int[] */ |
| 17 | private $contentAccessStats = []; |
| 18 | private string $format = "math.%d.%d"; |
| 19 | private bool $useCustomIds = false; |
| 20 | /** @var int[]|null */ |
| 21 | private $keys; |
| 22 | /** @var string[][]|null */ |
| 23 | private $contentIdMap; |
| 24 | |
| 25 | public static function newFromRevisionRecord( RevisionRecord $revisionRecord ): MathIdGenerator { |
| 26 | $contentModel = $revisionRecord |
| 27 | ->getSlot( SlotRecord::MAIN, RevisionRecord::RAW ) |
| 28 | ->getModel(); |
| 29 | if ( $contentModel !== CONTENT_MODEL_WIKITEXT ) { |
| 30 | throw new RuntimeException( "MathIdGenerator supports only CONTENT_MODEL_WIKITEXT" ); |
| 31 | } |
| 32 | $content = $revisionRecord->getContent( SlotRecord::MAIN ); |
| 33 | if ( !$content instanceof TextContent ) { |
| 34 | throw new RuntimeException( "MathIdGenerator supports only TextContent" ); |
| 35 | } |
| 36 | return new self( |
| 37 | $content->getText(), |
| 38 | $revisionRecord->getId() |
| 39 | ); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * @return int[] Array mapping key names to their position |
| 44 | */ |
| 45 | public function getKeys() { |
| 46 | if ( !isset( $this->keys ) ) { |
| 47 | $this->keys = array_flip( array_keys( $this->mathTags ) ); |
| 48 | } |
| 49 | return $this->keys; |
| 50 | } |
| 51 | |
| 52 | public function __construct( string $wikiText, int $revisionId = 0 ) { |
| 53 | $wikiText = Sanitizer::removeHTMLcomments( $wikiText ); |
| 54 | $this->wikiText = |
| 55 | Parser::extractTagsAndParams( [ 'nowki', 'syntaxhighlight', 'math' ], $wikiText, |
| 56 | $tags ); |
| 57 | $this->mathTags = array_filter( $tags, static function ( $v ) { |
| 58 | return $v[0] === 'math'; |
| 59 | } ); |
| 60 | $this->revisionId = $revisionId; |
| 61 | } |
| 62 | |
| 63 | public static function newFromRevisionId( int $revId ): MathIdGenerator { |
| 64 | $revisionRecord = MediaWikiServices::getInstance() |
| 65 | ->getRevisionLookup() |
| 66 | ->getRevisionById( $revId ); |
| 67 | |
| 68 | return self::newFromRevisionRecord( $revisionRecord ); |
| 69 | } |
| 70 | |
| 71 | public static function newFromTitle( Title $title ): MathIdGenerator { |
| 72 | return self::newFromRevisionId( $title->getLatestRevID() ); |
| 73 | } |
| 74 | |
| 75 | public function getIdList() { |
| 76 | return $this->formatIds( $this->mathTags ); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * @param array $mathTags |
| 81 | * |
| 82 | * @return string[] |
| 83 | */ |
| 84 | public function formatIds( $mathTags ) { |
| 85 | return array_map( [ $this, 'parserKey2fId' ], array_keys( $mathTags ) ); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * @param string $key |
| 90 | * |
| 91 | * @return string|null |
| 92 | */ |
| 93 | public function parserKey2fId( $key ) { |
| 94 | if ( $this->useCustomIds ) { |
| 95 | if ( isset( $this->mathTags[$key][self::ATTRIB_POS]['id'] ) ) { |
| 96 | return $this->mathTags[$key][self::ATTRIB_POS]['id']; |
| 97 | } |
| 98 | } |
| 99 | if ( isset( $this->mathTags[$key] ) ) { |
| 100 | return $this->formatKey( $key ); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | public function getInputHash( $inputTex ) { |
| 105 | return pack( "H32", md5( $inputTex ) ); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @param string $content |
| 110 | * |
| 111 | * @return string[] |
| 112 | */ |
| 113 | public function getIdsFromContent( $content ) { |
| 114 | $contentIdMap = $this->getContentIdMap(); |
| 115 | if ( array_key_exists( $content, $contentIdMap ) ) { |
| 116 | return $contentIdMap[$content]; |
| 117 | } |
| 118 | return []; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * @return string[][] |
| 123 | */ |
| 124 | public function getContentIdMap() { |
| 125 | if ( !$this->contentIdMap ) { |
| 126 | $this->contentIdMap = []; |
| 127 | foreach ( $this->mathTags as $key => $tag ) { |
| 128 | $userInputTex = $this->getUserInputTex( $tag ); |
| 129 | if ( !array_key_exists( $userInputTex, |
| 130 | $this->contentIdMap ) |
| 131 | ) { |
| 132 | $this->contentIdMap[$userInputTex] = []; |
| 133 | } |
| 134 | $this->contentIdMap[$userInputTex][] = |
| 135 | $this->parserKey2fId( $key ); |
| 136 | } |
| 137 | } |
| 138 | return $this->contentIdMap; |
| 139 | } |
| 140 | |
| 141 | public function guessIdFromContent( string $content ): ?string { |
| 142 | $allIds = $this->getIdsFromContent( $content ); |
| 143 | $size = count( $allIds ); |
| 144 | if ( $size == 0 ) { |
| 145 | return null; |
| 146 | } |
| 147 | if ( $size == 1 ) { |
| 148 | return $allIds[0]; |
| 149 | } |
| 150 | if ( array_key_exists( $content, $this->contentAccessStats ) ) { |
| 151 | $this->contentAccessStats[$content]++; |
| 152 | } else { |
| 153 | $this->contentAccessStats[$content] = 0; |
| 154 | } |
| 155 | $currentIndex = $this->contentAccessStats[$content] % $size; |
| 156 | return $allIds[$currentIndex]; |
| 157 | } |
| 158 | |
| 159 | public function getMathTags(): array { |
| 160 | return $this->mathTags; |
| 161 | } |
| 162 | |
| 163 | public function getWikiText(): string { |
| 164 | return $this->wikiText; |
| 165 | } |
| 166 | |
| 167 | public function getRevisionId(): int { |
| 168 | return $this->revisionId; |
| 169 | } |
| 170 | |
| 171 | public function setUseCustomIds( bool $useCustomIds ): void { |
| 172 | $this->useCustomIds = $useCustomIds; |
| 173 | } |
| 174 | |
| 175 | public function getTagFromId( string $eid ): ?array { |
| 176 | foreach ( $this->mathTags as $key => $mathTag ) { |
| 177 | if ( $eid == $this->formatKey( $key ) ) { |
| 178 | return $mathTag; |
| 179 | } |
| 180 | if ( isset( $mathTag[self::ATTRIB_POS]['id'] ) && $eid == $mathTag[self::ATTRIB_POS]['id'] ) { |
| 181 | return $mathTag; |
| 182 | } |
| 183 | } |
| 184 | return null; |
| 185 | } |
| 186 | |
| 187 | public function getUniqueFromId( string $eid ): ?string { |
| 188 | foreach ( $this->mathTags as $key => $mathTag ) { |
| 189 | if ( $eid == $this->formatKey( $key ) ) { |
| 190 | return $key; |
| 191 | } |
| 192 | if ( isset( $mathTag[self::ATTRIB_POS]['id'] ) && $eid == $mathTag[self::ATTRIB_POS]['id'] ) { |
| 193 | return $key; |
| 194 | } |
| 195 | } |
| 196 | return null; |
| 197 | } |
| 198 | |
| 199 | private function formatKey( string $key ): string { |
| 200 | $keys = $this->getKeys(); |
| 201 | return sprintf( $this->format, $this->revisionId, $keys[$key] ); |
| 202 | } |
| 203 | |
| 204 | public function getUserInputTex( array $tag ): string { |
| 205 | return ( new MathSource( $tag[self::CONTENT_POS], $tag[self::ATTRIB_POS] ) )->getUserInputTex(); |
| 206 | } |
| 207 | } |