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| 1 | <?php |
| 2 | /** |
| 3 | * This implements the "json" content model as an extension, to allow editing |
| 4 | * JSON data structures using Visual Editor. It represents the JSON |
| 5 | * structure as a nested table. |
| 6 | */ |
| 7 | |
| 8 | declare( strict_types = 1 ); |
| 9 | |
| 10 | namespace Wikimedia\Parsoid\Ext\JSON; |
| 11 | |
| 12 | use Wikimedia\Assert\Assert; |
| 13 | use Wikimedia\Parsoid\Core\ContentModelHandler; |
| 14 | use Wikimedia\Parsoid\Core\SelserData; |
| 15 | use Wikimedia\Parsoid\DOM\Document; |
| 16 | use Wikimedia\Parsoid\DOM\Element; |
| 17 | use Wikimedia\Parsoid\Ext\DOMUtils; |
| 18 | use Wikimedia\Parsoid\Ext\ExtensionModule; |
| 19 | use Wikimedia\Parsoid\Ext\ParsoidExtensionAPI; |
| 20 | use Wikimedia\Parsoid\Ext\PHPUtils; |
| 21 | use Wikimedia\Parsoid\Utils\DOMCompat; |
| 22 | |
| 23 | /** |
| 24 | * Native Parsoid implementation of the "json" contentmodel. |
| 25 | */ |
| 26 | class JSON extends ContentModelHandler implements ExtensionModule { |
| 27 | private const PARSE_ERROR_HTML = "<table typeof=\"mw:Error\" data-mw='{\"errors\":[{\"key\":\"bad-json\"}]}'>"; |
| 28 | |
| 29 | /** @inheritDoc */ |
| 30 | public function getConfig(): array { |
| 31 | return [ |
| 32 | 'name' => 'JSON content', |
| 33 | 'contentModels' => [ |
| 34 | 'json' => self::class, |
| 35 | ], |
| 36 | ]; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * @param Element $parent |
| 41 | * @param array|object|string $val |
| 42 | */ |
| 43 | private function rootValueTable( Element $parent, $val ): void { |
| 44 | if ( is_array( $val ) ) { |
| 45 | // Wrap arrays in another array so they're visually boxed in a |
| 46 | // container. Otherwise they are visually indistinguishable from |
| 47 | // a single value. |
| 48 | self::arrayTable( $parent, [ $val ] ); |
| 49 | return; |
| 50 | } |
| 51 | |
| 52 | if ( $val && is_object( $val ) ) { |
| 53 | self::objectTable( $parent, (array)$val ); |
| 54 | return; |
| 55 | } |
| 56 | |
| 57 | DOMCompat::setInnerHTML( $parent, |
| 58 | '<table class="mw-json mw-json-single-value"><tbody><tr><td>' ); |
| 59 | self::primitiveValue( DOMCompat::querySelector( $parent, 'td' ), $val ); |
| 60 | } |
| 61 | |
| 62 | private function objectTable( Element $parent, array $val ): void { |
| 63 | DOMCompat::setInnerHTML( $parent, |
| 64 | '<table class="mw-json mw-json-object"><tbody>' ); |
| 65 | $tbody = $parent->firstChild->firstChild; |
| 66 | DOMUtils::assertElt( $tbody ); |
| 67 | $keys = array_keys( $val ); |
| 68 | if ( count( $keys ) ) { |
| 69 | foreach ( $val as $k => $v ) { |
| 70 | self::objectRow( $tbody, (string)$k, $v ); |
| 71 | } |
| 72 | } else { |
| 73 | DOMCompat::setInnerHTML( $tbody, |
| 74 | '<tr><td class="mw-json-empty">' ); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * @param Element $parent |
| 80 | * @param ?string $key |
| 81 | * @param mixed $val |
| 82 | */ |
| 83 | private function objectRow( Element $parent, ?string $key, $val ): void { |
| 84 | $tr = $parent->ownerDocument->createElement( 'tr' ); |
| 85 | if ( $key !== null ) { |
| 86 | $th = $parent->ownerDocument->createElement( 'th' ); |
| 87 | $th->textContent = $key; |
| 88 | $tr->appendChild( $th ); |
| 89 | } |
| 90 | self::valueCell( $tr, $val ); |
| 91 | $parent->appendChild( $tr ); |
| 92 | } |
| 93 | |
| 94 | private function arrayTable( Element $parent, array $val ): void { |
| 95 | DOMCompat::setInnerHTML( $parent, |
| 96 | '<table class="mw-json mw-json-array"><tbody>' ); |
| 97 | $tbody = $parent->firstChild->firstChild; |
| 98 | DOMUtils::assertElt( $tbody ); |
| 99 | if ( count( $val ) ) { |
| 100 | foreach ( $val as $v ) { |
| 101 | self::objectRow( $tbody, null, $v ); |
| 102 | } |
| 103 | } else { |
| 104 | DOMCompat::setInnerHTML( $tbody, |
| 105 | '<tr><td class="mw-json-empty">' ); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @param Element $parent |
| 111 | * @param mixed $val |
| 112 | */ |
| 113 | private function valueCell( Element $parent, $val ): void { |
| 114 | $td = $parent->ownerDocument->createElement( 'td' ); |
| 115 | if ( is_array( $val ) ) { |
| 116 | self::arrayTable( $td, $val ); |
| 117 | } elseif ( $val && is_object( $val ) ) { |
| 118 | self::objectTable( $td, (array)$val ); |
| 119 | } else { |
| 120 | DOMCompat::getClassList( $td )->add( 'value' ); |
| 121 | self::primitiveValue( $td, $val ); |
| 122 | } |
| 123 | $parent->appendChild( $td ); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * @param Element $parent |
| 128 | * @param string|int|bool|null $val |
| 129 | */ |
| 130 | private function primitiveValue( Element $parent, $val ): void { |
| 131 | if ( $val === null ) { |
| 132 | DOMCompat::getClassList( $parent )->add( 'mw-json-null' ); |
| 133 | $parent->textContent = 'null'; |
| 134 | return; |
| 135 | } elseif ( is_bool( $val ) ) { |
| 136 | DOMCompat::getClassList( $parent )->add( 'mw-json-boolean' ); |
| 137 | $parent->textContent = $val ? 'true' : 'false'; |
| 138 | return; |
| 139 | } elseif ( is_int( $val ) || is_float( $val ) ) { |
| 140 | DOMCompat::getClassList( $parent )->add( 'mw-json-number' ); |
| 141 | } elseif ( is_string( $val ) ) { |
| 142 | DOMCompat::getClassList( $parent )->add( 'mw-json-string' ); |
| 143 | } |
| 144 | $parent->textContent = (string)$val; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * JSON to HTML. |
| 149 | * Implementation matches that from includes/content/JsonContent.php in |
| 150 | * mediawiki core, except that we distinguish value types. |
| 151 | * @param ParsoidExtensionAPI $extApi |
| 152 | * @return Document |
| 153 | */ |
| 154 | public function toDOM( ParsoidExtensionAPI $extApi ): Document { |
| 155 | // @phan-suppress-next-line PhanDeprecatedFunction not ready for this yet |
| 156 | $jsonText = $extApi->getPageConfig()->getPageMainContent(); |
| 157 | $document = $extApi->getTopLevelDoc(); |
| 158 | $body = DOMCompat::getBody( $document ); |
| 159 | |
| 160 | // PORT-FIXME: When production moves to PHP 7.3, re-enable this try |
| 161 | // catch code |
| 162 | |
| 163 | // try { |
| 164 | // $src = json_decode( $jsonText, false, 6, JSON_THROW_ON_ERROR ); |
| 165 | // self::rootValueTable( $body, $src ); |
| 166 | // } catch ( JsonException $e ) { |
| 167 | // DOMCompat::setInnerHTML( $body, self::PARSE_ERROR_HTML ); |
| 168 | // } |
| 169 | |
| 170 | $src = json_decode( $jsonText, false, 6 ); |
| 171 | if ( $src === null && json_last_error() !== JSON_ERROR_NONE ) { |
| 172 | DOMCompat::setInnerHTML( $body, self::PARSE_ERROR_HTML ); |
| 173 | } else { |
| 174 | self::rootValueTable( $body, $src ); |
| 175 | } |
| 176 | |
| 177 | // end of PHP 7.2 compatible error handling code, remove whem enabling |
| 178 | // 7.3+ try catch code |
| 179 | |
| 180 | // We're responsible for running the standard DOMPostProcessor on our |
| 181 | // resulting document. |
| 182 | $extApi->postProcessDOM( $document ); |
| 183 | |
| 184 | return $document; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * RootValueTableFrom |
| 189 | * @param Element $el |
| 190 | * @return array|false|int|string|null |
| 191 | */ |
| 192 | private function rootValueTableFrom( Element $el ) { |
| 193 | if ( DOMUtils::hasClass( $el, 'mw-json-single-value' ) ) { |
| 194 | return self::primitiveValueFrom( DOMCompat::querySelector( $el, 'tr > td' ) ); |
| 195 | } elseif ( DOMUtils::hasClass( $el, 'mw-json-array' ) ) { |
| 196 | return self::arrayTableFrom( $el )[0]; |
| 197 | } else { |
| 198 | return self::objectTableFrom( $el ); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * @param Element $el |
| 204 | * @return array |
| 205 | */ |
| 206 | private function objectTableFrom( Element $el ) { |
| 207 | Assert::invariant( DOMUtils::hasClass( $el, 'mw-json-object' ), |
| 208 | 'Expected mw-json-object' ); |
| 209 | $tbody = $el; |
| 210 | if ( $tbody->firstChild ) { |
| 211 | $child = $tbody->firstChild; |
| 212 | DOMUtils::assertElt( $child ); |
| 213 | if ( DOMCompat::nodeName( $child ) === 'tbody' ) { |
| 214 | $tbody = $child; |
| 215 | } |
| 216 | } |
| 217 | $rows = $tbody->childNodes; |
| 218 | $obj = []; |
| 219 | $empty = count( $rows ) === 0; |
| 220 | if ( !$empty ) { |
| 221 | $child = $rows->item( 0 )->firstChild; |
| 222 | DOMUtils::assertElt( $child ); |
| 223 | if ( DOMUtils::hasClass( $child, 'mw-json-empty' ) ) { |
| 224 | $empty = true; |
| 225 | } |
| 226 | } |
| 227 | if ( !$empty ) { |
| 228 | for ( $i = 0; $i < count( $rows ); $i++ ) { |
| 229 | $item = $rows->item( $i ); |
| 230 | DOMUtils::assertElt( $item ); |
| 231 | self::objectRowFrom( $item, $obj, null ); |
| 232 | } |
| 233 | } |
| 234 | return $obj; |
| 235 | } |
| 236 | |
| 237 | private function objectRowFrom( Element $tr, array &$obj, ?int $key ): void { |
| 238 | $td = $tr->firstChild; |
| 239 | if ( $key === null ) { |
| 240 | $key = $td->textContent; |
| 241 | $td = $td->nextSibling; |
| 242 | } |
| 243 | DOMUtils::assertElt( $td ); |
| 244 | $obj[$key] = self::valueCellFrom( $td ); |
| 245 | } |
| 246 | |
| 247 | private function arrayTableFrom( Element $el ): array { |
| 248 | Assert::invariant( DOMUtils::hasClass( $el, 'mw-json-array' ), |
| 249 | 'Expected ms-json-array' ); |
| 250 | $tbody = $el; |
| 251 | if ( $tbody->firstChild ) { |
| 252 | $child = $tbody->firstChild; |
| 253 | DOMUtils::assertElt( $child ); |
| 254 | if ( DOMCompat::nodeName( $child ) === 'tbody' ) { |
| 255 | $tbody = $child; |
| 256 | } |
| 257 | } |
| 258 | $rows = $tbody->childNodes; |
| 259 | $arr = []; |
| 260 | $empty = count( $rows ) === 0; |
| 261 | if ( !$empty ) { |
| 262 | $child = $rows->item( 0 )->firstChild; |
| 263 | DOMUtils::assertElt( $child ); |
| 264 | if ( DOMUtils::hasClass( $child, 'mw-json-empty' ) ) { |
| 265 | $empty = true; |
| 266 | } |
| 267 | } |
| 268 | if ( !$empty ) { |
| 269 | for ( $i = 0; $i < count( $rows ); $i++ ) { |
| 270 | $item = $rows->item( $i ); |
| 271 | DOMUtils::assertElt( $item ); |
| 272 | self::objectRowFrom( $item, $arr, $i ); |
| 273 | } |
| 274 | } |
| 275 | return $arr; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * @param Element $el |
| 280 | * @return array|object|false|float|int|string|null |
| 281 | */ |
| 282 | private function valueCellFrom( Element $el ) { |
| 283 | Assert::invariant( DOMCompat::nodeName( $el ) === 'td', 'Expected tagName = td' ); |
| 284 | $table = $el->firstChild; |
| 285 | if ( $table instanceof Element ) { |
| 286 | if ( DOMUtils::hasClass( $table, 'mw-json-array' ) ) { |
| 287 | return self::arrayTableFrom( $table ); |
| 288 | } elseif ( DOMUtils::hasClass( $table, 'mw-json-object' ) ) { |
| 289 | return self::objectTableFrom( $table ); |
| 290 | } |
| 291 | } else { |
| 292 | return self::primitiveValueFrom( $el ); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * @param Element $el |
| 298 | * @return false|float|int|string|null |
| 299 | */ |
| 300 | private function primitiveValueFrom( Element $el ) { |
| 301 | if ( DOMUtils::hasClass( $el, 'mw-json-null' ) ) { |
| 302 | return null; |
| 303 | } elseif ( DOMUtils::hasClass( $el, 'mw-json-boolean' ) ) { |
| 304 | return str_contains( $el->textContent, 'true' ); |
| 305 | } elseif ( DOMUtils::hasClass( $el, 'mw-json-number' ) ) { |
| 306 | return floatval( $el->textContent ); |
| 307 | } elseif ( DOMUtils::hasClass( $el, 'mw-json-string' ) ) { |
| 308 | return (string)$el->textContent; |
| 309 | } else { |
| 310 | return null; // shouldn't happen. |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * DOM to JSON. |
| 316 | * @param ParsoidExtensionAPI $extApi |
| 317 | * @param ?SelserData $selserData |
| 318 | * @return string |
| 319 | */ |
| 320 | public function fromDOM( |
| 321 | ParsoidExtensionAPI $extApi, ?SelserData $selserData = null |
| 322 | ): string { |
| 323 | $body = DOMCompat::getBody( $extApi->getTopLevelDoc() ); |
| 324 | $t = $body->firstChild; |
| 325 | DOMUtils::assertElt( $t ); |
| 326 | Assert::invariant( $t && DOMCompat::nodeName( $t ) === 'table', |
| 327 | 'Expected tagName = table' ); |
| 328 | self::rootValueTableFrom( $t ); |
| 329 | return PHPUtils::jsonEncode( self::rootValueTableFrom( $t ) ); |
| 330 | } |
| 331 | |
| 332 | } |