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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 | */ |
| 20 | |
| 21 | use Wikimedia\Assert\Assert; |
| 22 | use Wikimedia\Message\MessageParam; |
| 23 | use Wikimedia\Message\MessageSpecifier; |
| 24 | use Wikimedia\Message\MessageValue; |
| 25 | |
| 26 | /** |
| 27 | * Generic operation result class |
| 28 | * Has warning/error list, boolean status and arbitrary value |
| 29 | * |
| 30 | * "Good" means the operation was completed with no warnings or errors. |
| 31 | * |
| 32 | * "OK" means the operation was partially or wholly completed. |
| 33 | * |
| 34 | * An operation which is not OK should have errors so that the user can be |
| 35 | * informed as to what went wrong. Calling the fatal() function sets an error |
| 36 | * message and simultaneously switches off the OK flag. |
| 37 | * |
| 38 | * The recommended pattern for functions returning StatusValue objects is |
| 39 | * to return a StatusValue unconditionally, both on success and on failure |
| 40 | * (similarly to Option, Maybe, Promise etc. objects in other languages) -- |
| 41 | * so that the developer of the calling code is reminded that the function |
| 42 | * can fail, and so that a lack of error-handling will be explicit. |
| 43 | * |
| 44 | * This class accepts any MessageSpecifier objects. The use of Message objects |
| 45 | * should be avoided when serializability is needed. Use MessageValue in that |
| 46 | * case instead. |
| 47 | * |
| 48 | * @newable |
| 49 | * @stable to extend |
| 50 | * @since 1.25 |
| 51 | */ |
| 52 | class StatusValue implements Stringable { |
| 53 | |
| 54 | /** |
| 55 | * @var bool |
| 56 | * @internal Only for use by Status. Use {@link self::isOK()} or {@link self::setOK()}. |
| 57 | */ |
| 58 | protected $ok = true; |
| 59 | |
| 60 | /** |
| 61 | * @var array[] |
| 62 | * @internal Only for use by Status. Use {@link self::getErrors()} (get full list), |
| 63 | * {@link self::splitByErrorType()} (get errors/warnings), or |
| 64 | * {@link self::fatal()}, {@link self::error()} or {@link self::warning()} (add error/warning). |
| 65 | */ |
| 66 | protected $errors = []; |
| 67 | |
| 68 | /** @var mixed */ |
| 69 | public $value; |
| 70 | |
| 71 | /** @var bool[] Map of (key => bool) to indicate success of each part of batch operations */ |
| 72 | public $success = []; |
| 73 | |
| 74 | /** @var int Counter for batch operations */ |
| 75 | public $successCount = 0; |
| 76 | |
| 77 | /** @var int Counter for batch operations */ |
| 78 | public $failCount = 0; |
| 79 | |
| 80 | /** @var mixed arbitrary extra data about the operation */ |
| 81 | public $statusData; |
| 82 | |
| 83 | /** |
| 84 | * Factory function for fatal errors |
| 85 | * |
| 86 | * @param string|MessageSpecifier $message Message key or object |
| 87 | * @phpcs:ignore Generic.Files.LineLength |
| 88 | * @param MessageParam|MessageSpecifier|string|int|float|list<MessageParam|MessageSpecifier|string|int|float> ...$parameters |
| 89 | * See Message::params() |
| 90 | * @return static |
| 91 | */ |
| 92 | public static function newFatal( $message, ...$parameters ) { |
| 93 | $result = new static(); |
| 94 | $result->fatal( $message, ...$parameters ); |
| 95 | return $result; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Factory function for good results |
| 100 | * |
| 101 | * @param mixed|null $value |
| 102 | * @return static |
| 103 | */ |
| 104 | public static function newGood( $value = null ) { |
| 105 | $result = new static(); |
| 106 | $result->value = $value; |
| 107 | return $result; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Splits this StatusValue object into two new StatusValue objects, one which contains only |
| 112 | * the error messages, and one that contains the warnings, only. The returned array is |
| 113 | * defined as: |
| 114 | * [ |
| 115 | * 0 => object(StatusValue) # the StatusValue with error messages, only |
| 116 | * 1 => object(StatusValue) # The StatusValue with warning messages, only |
| 117 | * ] |
| 118 | * |
| 119 | * @return static[] |
| 120 | */ |
| 121 | public function splitByErrorType() { |
| 122 | $errorsOnlyStatusValue = static::newGood(); |
| 123 | $warningsOnlyStatusValue = static::newGood(); |
| 124 | $warningsOnlyStatusValue->setResult( true, $this->getValue() ); |
| 125 | $errorsOnlyStatusValue->setResult( $this->isOK(), $this->getValue() ); |
| 126 | |
| 127 | foreach ( $this->errors as $item ) { |
| 128 | if ( $item['type'] === 'warning' ) { |
| 129 | $warningsOnlyStatusValue->errors[] = $item; |
| 130 | } else { |
| 131 | $errorsOnlyStatusValue->errors[] = $item; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | return [ $errorsOnlyStatusValue, $warningsOnlyStatusValue ]; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Returns whether the operation completed and didn't have any error or |
| 140 | * warnings |
| 141 | * |
| 142 | * @return bool |
| 143 | */ |
| 144 | public function isGood() { |
| 145 | return $this->ok && !$this->errors; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns whether the operation completed |
| 150 | * |
| 151 | * @return bool |
| 152 | */ |
| 153 | public function isOK() { |
| 154 | return $this->ok; |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * @return mixed |
| 159 | */ |
| 160 | public function getValue() { |
| 161 | return $this->value; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Get the list of errors |
| 166 | * |
| 167 | * Each error is a (message:string or MessageSpecifier,params:array) map |
| 168 | * |
| 169 | * @deprecated since 1.43 Use `->getMessages()` instead |
| 170 | * @return array[] |
| 171 | * @phan-return array{type:'warning'|'error', message:string|MessageSpecifier, params:array}[] |
| 172 | */ |
| 173 | public function getErrors() { |
| 174 | return $this->errors; |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Change operation status |
| 179 | * |
| 180 | * @param bool $ok |
| 181 | * @return $this |
| 182 | */ |
| 183 | public function setOK( $ok ) { |
| 184 | $this->ok = $ok; |
| 185 | return $this; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Change operation result |
| 190 | * |
| 191 | * @param bool $ok Whether the operation completed |
| 192 | * @param mixed|null $value |
| 193 | * @return $this |
| 194 | */ |
| 195 | public function setResult( $ok, $value = null ) { |
| 196 | $this->ok = (bool)$ok; |
| 197 | $this->value = $value; |
| 198 | return $this; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Add a new error to the error array ($this->errors) if that error is not already in the |
| 203 | * error array. Each error is passed as an array with the following fields: |
| 204 | * |
| 205 | * - type: 'error' or 'warning' |
| 206 | * - message: a string (message key) or MessageSpecifier |
| 207 | * - params: an array of string parameters |
| 208 | * |
| 209 | * If the new error is of type 'error' and it matches an existing error of type 'warning', |
| 210 | * the existing error is upgraded to type 'error'. An error provided as a MessageSpecifier |
| 211 | * will successfully match an error provided as the same string message key and array of |
| 212 | * parameters as separate array elements. |
| 213 | * |
| 214 | * @param array $newError |
| 215 | * @phan-param array{type:'warning'|'error', message:string|MessageSpecifier, params:array} $newError |
| 216 | * @return $this |
| 217 | */ |
| 218 | private function addError( array $newError ) { |
| 219 | [ 'type' => $newType, 'message' => $newKey, 'params' => $newParams ] = $newError; |
| 220 | if ( $newKey instanceof MessageSpecifier ) { |
| 221 | Assert::parameter( $newParams === [], |
| 222 | '$parameters', "must be empty when using a MessageSpecifier" ); |
| 223 | $newParams = $newKey->getParams(); |
| 224 | $newKey = $newKey->getKey(); |
| 225 | } |
| 226 | |
| 227 | foreach ( $this->errors as [ 'type' => &$type, 'message' => $key, 'params' => $params ] ) { |
| 228 | if ( $key instanceof MessageSpecifier ) { |
| 229 | $params = $key->getParams(); |
| 230 | $key = $key->getKey(); |
| 231 | } |
| 232 | |
| 233 | // This uses loose equality as we must support equality between MessageParam objects |
| 234 | // (e.g. ScalarParam), including when they are created separate and not by-ref equal. |
| 235 | if ( $newKey === $key && $newParams == $params ) { |
| 236 | if ( $type === 'warning' && $newType === 'error' ) { |
| 237 | $type = 'error'; |
| 238 | } |
| 239 | return $this; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | $this->errors[] = $newError; |
| 244 | |
| 245 | return $this; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Add a new warning |
| 250 | * |
| 251 | * @param string|MessageSpecifier $message Message key or object |
| 252 | * @phpcs:ignore Generic.Files.LineLength |
| 253 | * @param MessageParam|MessageSpecifier|string|int|float|list<MessageParam|MessageSpecifier|string|int|float> ...$parameters |
| 254 | * See Message::params() |
| 255 | * @return $this |
| 256 | */ |
| 257 | public function warning( $message, ...$parameters ) { |
| 258 | return $this->addError( [ |
| 259 | 'type' => 'warning', |
| 260 | 'message' => $message, |
| 261 | 'params' => $parameters |
| 262 | ] ); |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Add an error, do not set fatal flag |
| 267 | * This can be used for non-fatal errors |
| 268 | * |
| 269 | * @param string|MessageSpecifier $message Message key or object |
| 270 | * @phpcs:ignore Generic.Files.LineLength |
| 271 | * @param MessageParam|MessageSpecifier|string|int|float|list<MessageParam|MessageSpecifier|string|int|float> ...$parameters |
| 272 | * See Message::params() |
| 273 | * @return $this |
| 274 | */ |
| 275 | public function error( $message, ...$parameters ) { |
| 276 | return $this->addError( [ |
| 277 | 'type' => 'error', |
| 278 | 'message' => $message, |
| 279 | 'params' => $parameters |
| 280 | ] ); |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Add an error and set OK to false, indicating that the operation |
| 285 | * as a whole was fatal |
| 286 | * |
| 287 | * @param string|MessageSpecifier $message Message key or object |
| 288 | * @phpcs:ignore Generic.Files.LineLength |
| 289 | * @param MessageParam|MessageSpecifier|string|int|float|list<MessageParam|MessageSpecifier|string|int|float> ...$parameters |
| 290 | * See Message::params() |
| 291 | * @return $this |
| 292 | */ |
| 293 | public function fatal( $message, ...$parameters ) { |
| 294 | $this->ok = false; |
| 295 | return $this->error( $message, ...$parameters ); |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Merge another status object into this one |
| 300 | * |
| 301 | * @param StatusValue $other |
| 302 | * @param bool $overwriteValue Whether to override the "value" member |
| 303 | * @return $this |
| 304 | */ |
| 305 | public function merge( $other, $overwriteValue = false ) { |
| 306 | if ( $this->statusData !== null && $other->statusData !== null ) { |
| 307 | throw new RuntimeException( "Status cannot be merged, because they both have \$statusData" ); |
| 308 | } else { |
| 309 | $this->statusData ??= $other->statusData; |
| 310 | } |
| 311 | |
| 312 | foreach ( $other->errors as $error ) { |
| 313 | $this->addError( $error ); |
| 314 | } |
| 315 | $this->ok = $this->ok && $other->ok; |
| 316 | if ( $overwriteValue ) { |
| 317 | $this->value = $other->value; |
| 318 | } |
| 319 | $this->successCount += $other->successCount; |
| 320 | $this->failCount += $other->failCount; |
| 321 | |
| 322 | return $this; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Returns a list of status messages of the given type |
| 327 | * |
| 328 | * Each entry is a map of: |
| 329 | * - message: string message key or MessageSpecifier |
| 330 | * - params: array list of parameters |
| 331 | * |
| 332 | * @deprecated since 1.43 Use `->getMessages( $type )` instead |
| 333 | * @param string $type |
| 334 | * @return array[] |
| 335 | * @phan-return array{type:'warning'|'error', message:string|MessageSpecifier, params:array}[] |
| 336 | */ |
| 337 | public function getErrorsByType( $type ) { |
| 338 | $result = []; |
| 339 | foreach ( $this->errors as $error ) { |
| 340 | if ( $error['type'] === $type ) { |
| 341 | $result[] = $error; |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | return $result; |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Returns a list of error messages, optionally only those of the given type |
| 350 | * |
| 351 | * If the `warning()` or `error()` method was called with a MessageSpecifier object, |
| 352 | * this method is guaranteed to return the same object. |
| 353 | * |
| 354 | * @since 1.43 |
| 355 | * @param ?string $type If provided, only return messages of the type 'warning' or 'error' |
| 356 | * @phan-param null|'warning'|'error' $type |
| 357 | * @return MessageSpecifier[] |
| 358 | */ |
| 359 | public function getMessages( ?string $type = null ): array { |
| 360 | Assert::parameter( $type === null || $type === 'warning' || $type === 'error', |
| 361 | '$type', "must be null, 'warning', or 'error'" ); |
| 362 | $result = []; |
| 363 | foreach ( $this->errors as $error ) { |
| 364 | if ( $type === null || $error['type'] === $type ) { |
| 365 | [ 'message' => $key, 'params' => $params ] = $error; |
| 366 | if ( $key instanceof MessageSpecifier ) { |
| 367 | $result[] = $key; |
| 368 | } else { |
| 369 | $result[] = new MessageValue( $key, $params ); |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | return $result; |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Returns true if the specified message is present as a warning or error. |
| 379 | * Any message using the same key will be found (ignoring the message parameters). |
| 380 | * |
| 381 | * @param string $message Message key to search for |
| 382 | * @return bool |
| 383 | */ |
| 384 | public function hasMessage( string $message ) { |
| 385 | foreach ( $this->errors as [ 'message' => $key ] ) { |
| 386 | if ( ( $key instanceof MessageSpecifier && $key->getKey() === $message ) || |
| 387 | $key === $message |
| 388 | ) { |
| 389 | return true; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | return false; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Returns true if any other message than the specified ones is present as a warning or error. |
| 398 | * Any messages using the same keys will be found (ignoring the message parameters). |
| 399 | * |
| 400 | * @param string ...$messages Message keys to search for |
| 401 | * @return bool |
| 402 | */ |
| 403 | public function hasMessagesExcept( string ...$messages ) { |
| 404 | foreach ( $this->errors as [ 'message' => $key ] ) { |
| 405 | if ( $key instanceof MessageSpecifier ) { |
| 406 | $key = $key->getKey(); |
| 407 | } |
| 408 | if ( !in_array( $key, $messages, true ) ) { |
| 409 | return true; |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | return false; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * If the specified source message exists, replace it with the specified |
| 418 | * destination message, but keep the same parameters as in the original error. |
| 419 | * |
| 420 | * Any message using the same key will be replaced (ignoring the message parameters). |
| 421 | * |
| 422 | * @param string $source Message key to search for |
| 423 | * @param MessageSpecifier|string $dest Replacement message key or object |
| 424 | * @return bool Return true if the replacement was done, false otherwise. |
| 425 | */ |
| 426 | public function replaceMessage( string $source, $dest ) { |
| 427 | $replaced = false; |
| 428 | |
| 429 | foreach ( $this->errors as [ 'message' => &$message, 'params' => &$params ] ) { |
| 430 | if ( $message === $source || |
| 431 | ( $message instanceof MessageSpecifier && $message->getKey() === $source ) |
| 432 | ) { |
| 433 | $message = $dest; |
| 434 | if ( $dest instanceof MessageSpecifier ) { |
| 435 | // 'params' will be ignored now, so remove them from the internal array |
| 436 | $params = []; |
| 437 | } |
| 438 | $replaced = true; |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | return $replaced; |
| 443 | } |
| 444 | |
| 445 | /** |
| 446 | * Returns a string representation of the status for debugging. |
| 447 | * This is fairly verbose and may change without notice. |
| 448 | * |
| 449 | * @return string |
| 450 | */ |
| 451 | public function __toString() { |
| 452 | $status = $this->isOK() ? "OK" : "Error"; |
| 453 | if ( count( $this->errors ) ) { |
| 454 | $errorcount = "collected " . ( count( $this->errors ) ) . " message(s) on the way"; |
| 455 | } else { |
| 456 | $errorcount = "no errors detected"; |
| 457 | } |
| 458 | if ( $this->value !== null ) { |
| 459 | $valstr = get_debug_type( $this->value ) . " value set"; |
| 460 | } else { |
| 461 | $valstr = "no value set"; |
| 462 | } |
| 463 | $out = sprintf( "<%s, %s, %s>", |
| 464 | $status, |
| 465 | $errorcount, |
| 466 | $valstr |
| 467 | ); |
| 468 | if ( count( $this->errors ) > 0 ) { |
| 469 | $hdr = sprintf( "+-%'-8s-+-%'-25s-+-%'-36s-+\n", "", "", "" ); |
| 470 | $out .= "\n" . $hdr; |
| 471 | foreach ( $this->errors as [ 'type' => $type, 'message' => $key, 'params' => $params ] ) { |
| 472 | if ( $key instanceof MessageSpecifier ) { |
| 473 | $params = $key->getParams(); |
| 474 | $key = $key->getKey(); |
| 475 | } |
| 476 | |
| 477 | $keyChunks = mb_str_split( $key, 25 ); |
| 478 | $paramsChunks = mb_str_split( $this->flattenParams( $params, " | " ), 36 ); |
| 479 | |
| 480 | // array_map(null,...) is like Python's zip() |
| 481 | foreach ( array_map( null, [ $type ], $keyChunks, $paramsChunks ) |
| 482 | as [ $typeChunk, $keyChunk, $paramsChunk ] |
| 483 | ) { |
| 484 | $out .= sprintf( "| %-8s | %-25s | %-36s |\n", |
| 485 | $typeChunk, |
| 486 | $keyChunk, |
| 487 | $paramsChunk |
| 488 | ); |
| 489 | } |
| 490 | } |
| 491 | $out .= $hdr; |
| 492 | } |
| 493 | |
| 494 | return $out; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * @param array $params Message parameters |
| 499 | * @param string $joiner |
| 500 | * |
| 501 | * @return string String representation |
| 502 | */ |
| 503 | private function flattenParams( array $params, string $joiner = ', ' ): string { |
| 504 | $ret = []; |
| 505 | foreach ( $params as $p ) { |
| 506 | if ( is_array( $p ) ) { |
| 507 | $r = '[ ' . self::flattenParams( $p ) . ' ]'; |
| 508 | } elseif ( $p instanceof MessageSpecifier ) { |
| 509 | $r = '{ ' . $p->getKey() . ': ' . self::flattenParams( $p->getParams() ) . ' }'; |
| 510 | } elseif ( $p instanceof MessageParam ) { |
| 511 | $r = $p->dump(); |
| 512 | } else { |
| 513 | $r = (string)$p; |
| 514 | } |
| 515 | |
| 516 | $ret[] = mb_strlen( $r ) > 100 ? mb_substr( $r, 0, 99 ) . "..." : $r; |
| 517 | } |
| 518 | return implode( $joiner, $ret ); |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * Returns a list of status messages of the given type (or all if false) |
| 523 | * |
| 524 | * @internal Only for use by Status. |
| 525 | * |
| 526 | * @param string|bool $type |
| 527 | * @return array[] |
| 528 | */ |
| 529 | protected function getStatusArray( $type = false ) { |
| 530 | $result = []; |
| 531 | |
| 532 | foreach ( $this->getErrors() as $error ) { |
| 533 | if ( !$type || $error['type'] === $type ) { |
| 534 | if ( $error['message'] instanceof MessageSpecifier ) { |
| 535 | $result[] = [ $error['message']->getKey(), ...$error['message']->getParams() ]; |
| 536 | } else { |
| 537 | $result[] = [ $error['message'], ...$error['params'] ]; |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | return $result; |
| 543 | } |
| 544 | } |