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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | * @author fdcn <fdcn64@gmail.com>, PhiLiP <philip.npc@gmail.com> |
| 20 | */ |
| 21 | |
| 22 | use MediaWiki\Logger\LoggerFactory; |
| 23 | |
| 24 | /** |
| 25 | * The rules used for language conversion, this processes the rules |
| 26 | * extracted by Parser from the `-{ }-` wikitext syntax. |
| 27 | * |
| 28 | * @ingroup Language |
| 29 | */ |
| 30 | class ConverterRule { |
| 31 | /** |
| 32 | * @var string original text in -{text}- |
| 33 | */ |
| 34 | public $mText; |
| 35 | /** |
| 36 | * @var LanguageConverter |
| 37 | */ |
| 38 | public $mConverter; |
| 39 | public $mRuleDisplay = ''; |
| 40 | public $mRuleTitle = false; |
| 41 | /** |
| 42 | * @var string the text of the rules |
| 43 | */ |
| 44 | public $mRules = ''; |
| 45 | public $mRulesAction = 'none'; |
| 46 | public $mFlags = []; |
| 47 | public $mVariantFlags = []; |
| 48 | public $mConvTable = []; |
| 49 | /** |
| 50 | * @var array of the translation in each variant |
| 51 | */ |
| 52 | public $mBidtable = []; |
| 53 | /** |
| 54 | * @var array of the translation in each variant |
| 55 | */ |
| 56 | public $mUnidtable = []; |
| 57 | |
| 58 | /** |
| 59 | * @param string $text The text between -{ and }- |
| 60 | * @param LanguageConverter $converter |
| 61 | */ |
| 62 | public function __construct( $text, LanguageConverter $converter ) { |
| 63 | $this->mText = $text; |
| 64 | $this->mConverter = $converter; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Check if the variant array is in the convert array. |
| 69 | * |
| 70 | * @param array|string $variants Variant language code |
| 71 | * @return string|false Translated text |
| 72 | */ |
| 73 | public function getTextInBidtable( $variants ) { |
| 74 | $variants = (array)$variants; |
| 75 | if ( !$variants ) { |
| 76 | return false; |
| 77 | } |
| 78 | foreach ( $variants as $variant ) { |
| 79 | if ( isset( $this->mBidtable[$variant] ) ) { |
| 80 | return $this->mBidtable[$variant]; |
| 81 | } |
| 82 | } |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Parse flags with syntax -{FLAG| ... }- |
| 88 | */ |
| 89 | private function parseFlags() { |
| 90 | $text = $this->mText; |
| 91 | $flags = []; |
| 92 | $variantFlags = []; |
| 93 | |
| 94 | $sepPos = strpos( $text, '|' ); |
| 95 | if ( $sepPos !== false ) { |
| 96 | $validFlags = $this->mConverter->getFlags(); |
| 97 | $f = StringUtils::explode( ';', substr( $text, 0, $sepPos ) ); |
| 98 | foreach ( $f as $ff ) { |
| 99 | $ff = trim( $ff ); |
| 100 | if ( isset( $validFlags[$ff] ) ) { |
| 101 | $flags[$validFlags[$ff]] = true; |
| 102 | } |
| 103 | } |
| 104 | $text = strval( substr( $text, $sepPos + 1 ) ); |
| 105 | } |
| 106 | |
| 107 | if ( !$flags ) { |
| 108 | $flags['S'] = true; |
| 109 | } elseif ( isset( $flags['R'] ) ) { |
| 110 | // remove other flags |
| 111 | $flags = [ 'R' => true ]; |
| 112 | } elseif ( isset( $flags['N'] ) ) { |
| 113 | // remove other flags |
| 114 | $flags = [ 'N' => true ]; |
| 115 | } elseif ( isset( $flags['-'] ) ) { |
| 116 | // remove other flags |
| 117 | $flags = [ '-' => true ]; |
| 118 | } elseif ( count( $flags ) === 1 && isset( $flags['T'] ) ) { |
| 119 | $flags['H'] = true; |
| 120 | } elseif ( isset( $flags['H'] ) ) { |
| 121 | // replace A flag, and remove other flags except T |
| 122 | $temp = [ '+' => true, 'H' => true ]; |
| 123 | if ( isset( $flags['T'] ) ) { |
| 124 | $temp['T'] = true; |
| 125 | } |
| 126 | if ( isset( $flags['D'] ) ) { |
| 127 | $temp['D'] = true; |
| 128 | } |
| 129 | $flags = $temp; |
| 130 | } else { |
| 131 | if ( isset( $flags['A'] ) ) { |
| 132 | $flags['+'] = true; |
| 133 | $flags['S'] = true; |
| 134 | } |
| 135 | if ( isset( $flags['D'] ) ) { |
| 136 | unset( $flags['S'] ); |
| 137 | } |
| 138 | // try to find flags like "zh-hans", "zh-hant" |
| 139 | // allow syntaxes like "-{zh-hans;zh-hant|XXXX}-" |
| 140 | $variantFlags = array_intersect( array_keys( $flags ), $this->mConverter->getVariants() ); |
| 141 | if ( $variantFlags ) { |
| 142 | $variantFlags = array_fill_keys( $variantFlags, true ); |
| 143 | $flags = []; |
| 144 | } |
| 145 | } |
| 146 | $this->mVariantFlags = $variantFlags; |
| 147 | $this->mRules = $text; |
| 148 | $this->mFlags = $flags; |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Generate conversion table. |
| 153 | */ |
| 154 | private function parseRules() { |
| 155 | $rules = $this->mRules; |
| 156 | $bidtable = []; |
| 157 | $unidtable = []; |
| 158 | $varsep_pattern = $this->mConverter->getVarSeparatorPattern(); |
| 159 | |
| 160 | // Split text according to $varsep_pattern, but ignore semicolons from HTML entities |
| 161 | $rules = preg_replace( '/(&[#a-zA-Z0-9]+);/', "$1\x01", $rules ); |
| 162 | $choice = preg_split( $varsep_pattern, $rules ); |
| 163 | // @phan-suppress-next-line PhanTypeComparisonFromArray |
| 164 | if ( $choice === false ) { |
| 165 | $error = preg_last_error(); |
| 166 | $errorText = preg_last_error_msg(); |
| 167 | LoggerFactory::getInstance( 'parser' )->warning( |
| 168 | 'ConverterRule preg_split error: {code} {errorText}', |
| 169 | [ |
| 170 | 'code' => $error, |
| 171 | 'errorText' => $errorText |
| 172 | ] |
| 173 | ); |
| 174 | $choice = []; |
| 175 | } |
| 176 | $choice = str_replace( "\x01", ';', $choice ); |
| 177 | |
| 178 | foreach ( $choice as $c ) { |
| 179 | $v = explode( ':', $c, 2 ); |
| 180 | if ( count( $v ) !== 2 ) { |
| 181 | // syntax error, skip |
| 182 | continue; |
| 183 | } |
| 184 | $to = trim( $v[1] ); |
| 185 | $v = trim( $v[0] ); |
| 186 | $u = explode( '=>', $v, 2 ); |
| 187 | $vv = $this->mConverter->validateVariant( $v ); |
| 188 | // if $to is empty (which is also used as $from in bidtable), |
| 189 | // strtr() could return a wrong result. |
| 190 | if ( count( $u ) === 1 && $to !== '' && $vv ) { |
| 191 | $bidtable[$vv] = $to; |
| 192 | } elseif ( count( $u ) === 2 ) { |
| 193 | $from = trim( $u[0] ); |
| 194 | $v = trim( $u[1] ); |
| 195 | $vv = $this->mConverter->validateVariant( $v ); |
| 196 | // if $from is empty, strtr() could return a wrong result. |
| 197 | if ( array_key_exists( $vv, $unidtable ) |
| 198 | && !is_array( $unidtable[$vv] ) |
| 199 | && $from !== '' |
| 200 | && $vv ) { |
| 201 | $unidtable[$vv] = [ $from => $to ]; |
| 202 | } elseif ( $from !== '' && $vv ) { |
| 203 | $unidtable[$vv][$from] = $to; |
| 204 | } |
| 205 | } |
| 206 | // syntax error, pass |
| 207 | if ( !isset( $this->mConverter->getVariantNames()[$vv] ) ) { |
| 208 | $bidtable = []; |
| 209 | $unidtable = []; |
| 210 | break; |
| 211 | } |
| 212 | } |
| 213 | $this->mBidtable = $bidtable; |
| 214 | $this->mUnidtable = $unidtable; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * @return string |
| 219 | */ |
| 220 | private function getRulesDesc() { |
| 221 | $codesep = $this->mConverter->getDescCodeSeparator(); |
| 222 | $varsep = $this->mConverter->getDescVarSeparator(); |
| 223 | $text = ''; |
| 224 | foreach ( $this->mBidtable as $k => $v ) { |
| 225 | $text .= $this->mConverter->getVariantNames()[$k] . "$codesep$v$varsep"; |
| 226 | } |
| 227 | foreach ( $this->mUnidtable as $k => $a ) { |
| 228 | foreach ( $a as $from => $to ) { |
| 229 | $text .= $from . '⇒' . $this->mConverter->getVariantNames()[$k] . |
| 230 | "$codesep$to$varsep"; |
| 231 | } |
| 232 | } |
| 233 | return $text; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Parse rules conversion. |
| 238 | * |
| 239 | * @param string $variant |
| 240 | * |
| 241 | * @return string |
| 242 | */ |
| 243 | private function getRuleConvertedStr( $variant ) { |
| 244 | $bidtable = $this->mBidtable; |
| 245 | $unidtable = $this->mUnidtable; |
| 246 | |
| 247 | if ( count( $bidtable ) + count( $unidtable ) === 0 ) { |
| 248 | return $this->mRules; |
| 249 | } |
| 250 | |
| 251 | // display current variant in bidirectional array |
| 252 | $disp = $this->getTextInBidtable( $variant ); |
| 253 | // or display current variant in fallbacks |
| 254 | if ( $disp === false ) { |
| 255 | $disp = $this->getTextInBidtable( |
| 256 | $this->mConverter->getVariantFallbacks( $variant ) ); |
| 257 | } |
| 258 | // or display current variant in unidirectional array |
| 259 | if ( $disp === false && array_key_exists( $variant, $unidtable ) ) { |
| 260 | $disp = array_values( $unidtable[$variant] )[0]; |
| 261 | } |
| 262 | // or display first text under disable manual convert |
| 263 | if ( $disp === false && $this->mConverter->getManualLevel()[$variant] === 'disable' ) { |
| 264 | if ( count( $bidtable ) > 0 ) { |
| 265 | $disp = array_values( $bidtable )[0]; |
| 266 | } else { |
| 267 | $disp = array_values( array_values( $unidtable )[0] )[0]; |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | return $disp; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Similar to getRuleConvertedStr(), but this prefers to use MediaWiki\Title\Title; |
| 276 | * use original page title if $variant === $this->mConverter->getMainCode(), |
| 277 | * and may return false in this case (so this title conversion rule |
| 278 | * will be ignored and the original title is shown). |
| 279 | * |
| 280 | * @since 1.22 |
| 281 | * @param string $variant The variant code to display page title in |
| 282 | * @return string|false The converted title or false if just page name |
| 283 | */ |
| 284 | private function getRuleConvertedTitle( $variant ) { |
| 285 | if ( $variant === $this->mConverter->getMainCode() ) { |
| 286 | // If a string targeting exactly this variant is set, |
| 287 | // use it. Otherwise, just return false, so the real |
| 288 | // page name can be shown (and because variant === main, |
| 289 | // there'll be no further automatic conversion). |
| 290 | $disp = $this->getTextInBidtable( $variant ); |
| 291 | if ( $disp ) { |
| 292 | return $disp; |
| 293 | } |
| 294 | if ( array_key_exists( $variant, $this->mUnidtable ) ) { |
| 295 | $disp = array_values( $this->mUnidtable[$variant] )[0]; |
| 296 | } |
| 297 | // Assigned above or still false. |
| 298 | return $disp; |
| 299 | } |
| 300 | |
| 301 | return $this->getRuleConvertedStr( $variant ); |
| 302 | } |
| 303 | |
| 304 | /** |
| 305 | * Generate conversion table for all text. |
| 306 | */ |
| 307 | private function generateConvTable() { |
| 308 | // Special case optimisation |
| 309 | if ( !$this->mBidtable && !$this->mUnidtable ) { |
| 310 | $this->mConvTable = []; |
| 311 | return; |
| 312 | } |
| 313 | |
| 314 | $bidtable = $this->mBidtable; |
| 315 | $unidtable = $this->mUnidtable; |
| 316 | $manLevel = $this->mConverter->getManualLevel(); |
| 317 | |
| 318 | $vmarked = []; |
| 319 | foreach ( $this->mConverter->getVariants() as $v ) { |
| 320 | /* for bidirectional array |
| 321 | fill in the missing variants, if any, |
| 322 | with fallbacks */ |
| 323 | if ( !isset( $bidtable[$v] ) ) { |
| 324 | $variantFallbacks = |
| 325 | $this->mConverter->getVariantFallbacks( $v ); |
| 326 | $vf = $this->getTextInBidtable( $variantFallbacks ); |
| 327 | if ( $vf ) { |
| 328 | $bidtable[$v] = $vf; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | if ( isset( $bidtable[$v] ) ) { |
| 333 | foreach ( $vmarked as $vo ) { |
| 334 | // use syntax: -{A|zh:WordZh;zh-tw:WordTw}- |
| 335 | // or -{H|zh:WordZh;zh-tw:WordTw}- |
| 336 | // or -{-|zh:WordZh;zh-tw:WordTw}- |
| 337 | // to introduce a custom mapping between |
| 338 | // words WordZh and WordTw in the whole text |
| 339 | if ( $manLevel[$v] === 'bidirectional' ) { |
| 340 | $this->mConvTable[$v][$bidtable[$vo]] = $bidtable[$v]; |
| 341 | } |
| 342 | if ( $manLevel[$vo] === 'bidirectional' ) { |
| 343 | $this->mConvTable[$vo][$bidtable[$v]] = $bidtable[$vo]; |
| 344 | } |
| 345 | } |
| 346 | $vmarked[] = $v; |
| 347 | } |
| 348 | /* for unidirectional array fill to convert tables */ |
| 349 | if ( ( $manLevel[$v] === 'bidirectional' || $manLevel[$v] === 'unidirectional' ) |
| 350 | && isset( $unidtable[$v] ) |
| 351 | ) { |
| 352 | if ( isset( $this->mConvTable[$v] ) ) { |
| 353 | $this->mConvTable[$v] = $unidtable[$v] + $this->mConvTable[$v]; |
| 354 | } else { |
| 355 | $this->mConvTable[$v] = $unidtable[$v]; |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * Parse rules and flags. |
| 363 | * @param string|null $variant Variant language code |
| 364 | */ |
| 365 | public function parse( $variant = null ) { |
| 366 | if ( !$variant ) { |
| 367 | $variant = $this->mConverter->getPreferredVariant(); |
| 368 | } |
| 369 | |
| 370 | $this->parseFlags(); |
| 371 | $flags = $this->mFlags; |
| 372 | |
| 373 | // convert to specified variant |
| 374 | // syntax: -{zh-hans;zh-hant[;...]|<text to convert>}- |
| 375 | if ( $this->mVariantFlags ) { |
| 376 | // check if current variant in flags |
| 377 | if ( isset( $this->mVariantFlags[$variant] ) ) { |
| 378 | // then convert <text to convert> to current language |
| 379 | $this->mRules = $this->mConverter->autoConvert( $this->mRules, |
| 380 | $variant ); |
| 381 | } else { |
| 382 | // if the current variant is not in flags, |
| 383 | // then we check its fallback variants. |
| 384 | $variantFallbacks = |
| 385 | $this->mConverter->getVariantFallbacks( $variant ); |
| 386 | if ( is_array( $variantFallbacks ) ) { |
| 387 | foreach ( $variantFallbacks as $variantFallback ) { |
| 388 | // if current variant's fallback exist in flags |
| 389 | if ( isset( $this->mVariantFlags[$variantFallback] ) ) { |
| 390 | // then convert <text to convert> to fallback language |
| 391 | $this->mRules = |
| 392 | $this->mConverter->autoConvert( $this->mRules, |
| 393 | $variantFallback ); |
| 394 | break; |
| 395 | } |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | $this->mFlags = $flags = [ 'R' => true ]; |
| 400 | } |
| 401 | |
| 402 | if ( !isset( $flags['R'] ) && !isset( $flags['N'] ) ) { |
| 403 | // decode => HTML entities modified by Sanitizer::internalRemoveHtmlTags |
| 404 | $this->mRules = str_replace( '=>', '=>', $this->mRules ); |
| 405 | $this->parseRules(); |
| 406 | } |
| 407 | $rules = $this->mRules; |
| 408 | |
| 409 | if ( !$this->mBidtable && !$this->mUnidtable ) { |
| 410 | if ( isset( $flags['+'] ) || isset( $flags['-'] ) ) { |
| 411 | // fill all variants if the text in -{A/H/-|text}- is non-empty but without rules |
| 412 | if ( $rules !== '' ) { |
| 413 | foreach ( $this->mConverter->getVariants() as $v ) { |
| 414 | $this->mBidtable[$v] = $rules; |
| 415 | } |
| 416 | } |
| 417 | } elseif ( !isset( $flags['N'] ) && !isset( $flags['T'] ) ) { |
| 418 | $this->mFlags = $flags = [ 'R' => true ]; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | $this->mRuleDisplay = false; |
| 423 | foreach ( $flags as $flag => $unused ) { |
| 424 | switch ( $flag ) { |
| 425 | case 'R': |
| 426 | // if we don't do content convert, still strip the -{}- tags |
| 427 | $this->mRuleDisplay = $rules; |
| 428 | break; |
| 429 | case 'N': |
| 430 | // process N flag: output current variant name |
| 431 | $ruleVar = trim( $rules ); |
| 432 | $this->mRuleDisplay = $this->mConverter->getVariantNames()[$ruleVar] ?? ''; |
| 433 | break; |
| 434 | case 'D': |
| 435 | // process D flag: output rules description |
| 436 | $this->mRuleDisplay = $this->getRulesDesc(); |
| 437 | break; |
| 438 | case 'H': |
| 439 | // process H,- flag or T only: output nothing |
| 440 | $this->mRuleDisplay = ''; |
| 441 | break; |
| 442 | case '-': |
| 443 | $this->mRulesAction = 'remove'; |
| 444 | $this->mRuleDisplay = ''; |
| 445 | break; |
| 446 | case '+': |
| 447 | $this->mRulesAction = 'add'; |
| 448 | $this->mRuleDisplay = ''; |
| 449 | break; |
| 450 | case 'S': |
| 451 | $this->mRuleDisplay = $this->getRuleConvertedStr( $variant ); |
| 452 | break; |
| 453 | case 'T': |
| 454 | $this->mRuleTitle = $this->getRuleConvertedTitle( $variant ); |
| 455 | $this->mRuleDisplay = ''; |
| 456 | break; |
| 457 | default: |
| 458 | // ignore unknown flags (but see error-case below) |
| 459 | } |
| 460 | } |
| 461 | if ( $this->mRuleDisplay === false ) { |
| 462 | $this->mRuleDisplay = '<span class="error">' |
| 463 | . wfMessage( 'converter-manual-rule-error' )->inContentLanguage()->escaped() |
| 464 | . '</span>'; |
| 465 | } |
| 466 | |
| 467 | $this->generateConvTable(); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * Checks if there are conversion rules. |
| 472 | * @return bool |
| 473 | */ |
| 474 | public function hasRules() { |
| 475 | return $this->mRules !== ''; |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * Get display text on markup -{...}- |
| 480 | * @return string |
| 481 | */ |
| 482 | public function getDisplay() { |
| 483 | return $this->mRuleDisplay; |
| 484 | } |
| 485 | |
| 486 | /** |
| 487 | * Get converted title. |
| 488 | * @return string|false |
| 489 | */ |
| 490 | public function getTitle() { |
| 491 | return $this->mRuleTitle; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * Return how to deal with conversion rules. |
| 496 | * @return string |
| 497 | */ |
| 498 | public function getRulesAction() { |
| 499 | return $this->mRulesAction; |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * Get conversion table. (bidirectional and unidirectional |
| 504 | * conversion table) |
| 505 | * @return array |
| 506 | */ |
| 507 | public function getConvTable() { |
| 508 | return $this->mConvTable; |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * Get conversion rules string. |
| 513 | * @return string |
| 514 | */ |
| 515 | public function getRules() { |
| 516 | return $this->mRules; |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * Get conversion flags. |
| 521 | * @return array |
| 522 | */ |
| 523 | public function getFlags() { |
| 524 | return $this->mFlags; |
| 525 | } |
| 526 | } |