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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2013-2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | */ |
| 20 | |
| 21 | use oat\oatbox\service\ConfigurableService; |
| 22 | use oat\taoResultServer\models\classes\ResultDeliveryExecutionDelete; |
| 23 | use oat\taoResultServer\models\classes\ResultManagement; |
| 24 | use oat\taoResultServer\models\Entity\ItemVariableStorable; |
| 25 | use oat\taoResultServer\models\Entity\TestVariableStorable; |
| 26 | use oat\taoResultServer\models\Entity\VariableStorable; |
| 27 | use oat\taoResultServer\models\Exceptions\DuplicateVariableException; |
| 28 | |
| 29 | /** |
| 30 | * Implements tao results storage using the configured persistency "taoAltResultStorage" |
| 31 | * |
| 32 | * The storage is done on a callId basis (the key). retrieval of all variables pertainign to a callid |
| 33 | * is done using get or hget for aparticular variable 0(1) |
| 34 | * The jsondata contains all the observations recorderd with the variable data + context |
| 35 | * |
| 36 | * keyPrefixCallId.$callId => |
| 37 | * (field)variableIdentifier : json data , |
| 38 | * (field)variableIdentifier : json data, |
| 39 | * ... |
| 40 | * } |
| 41 | * |
| 42 | * phpcs:disable Squiz.Classes.ValidClassName,PSR1.Classes.ClassDeclaration |
| 43 | */ |
| 44 | class taoAltResultStorage_models_classes_KeyValueResultStorage extends ConfigurableService implements |
| 45 | taoResultServer_models_classes_WritableResultStorage, |
| 46 | ResultManagement |
| 47 | { |
| 48 | use ResultDeliveryExecutionDelete; |
| 49 | |
| 50 | public const SERVICE_ID = 'taoAltResultStorage/KeyValueResultStorage'; |
| 51 | |
| 52 | /** result storage persistence identifier */ |
| 53 | public const OPTION_PERSISTENCE = 'persistence_id'; |
| 54 | |
| 55 | // prefixes used for keys |
| 56 | // keyPrefixCallId.$callId --> variables |
| 57 | public const PREFIX_CALL_ID = 'taoAltResultStorage:callIdVariables'; |
| 58 | // keyPrefixTestTaker.$deliveryResultIdentifier -->testtaker |
| 59 | public const PREFIX_TESTTAKER = 'taoAltResultStorage:resultsTestTaker'; |
| 60 | // keyPrefixDelivery.$deliveryResultIdentifier -->testtaker |
| 61 | public const PREFIX_DELIVERY = 'taoAltResultStorage:resultsDelivery'; |
| 62 | public const PREFIX_RESULT_ID = 'taoAltResultStorage:id'; |
| 63 | |
| 64 | /** |
| 65 | * Property separator string. |
| 66 | */ |
| 67 | public const PROPERTY_SEPARATOR = '_prop_'; |
| 68 | |
| 69 | /** |
| 70 | * @var common_persistence_AdvKeyValuePersistence |
| 71 | */ |
| 72 | private $persistence; |
| 73 | |
| 74 | /** |
| 75 | * Initialise the persistence and return it |
| 76 | * |
| 77 | * @return common_persistence_AdvKeyValuePersistence |
| 78 | */ |
| 79 | private function getPersistence() |
| 80 | { |
| 81 | if (is_null($this->persistence)) { |
| 82 | $perisistenceManager = $this->getServiceLocator()->get(common_persistence_Manager::SERVICE_ID); |
| 83 | $this->persistence = $perisistenceManager->getPersistenceById($this->getOption(self::OPTION_PERSISTENCE)); |
| 84 | } |
| 85 | |
| 86 | return $this->persistence; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * @param string $callId |
| 91 | * @param string $variableIdentifier |
| 92 | * @param VariableStorable $data |
| 93 | * the actual variable-value object, |
| 94 | */ |
| 95 | private function storeVariableKeyValue($callId, $variableIdentifier, $data) |
| 96 | { |
| 97 | $callId = self::PREFIX_CALL_ID . $callId; |
| 98 | |
| 99 | /* |
| 100 | * Seems to be the same complexity, worse if not yet value set for that key to be benchmarked against the |
| 101 | * general case only |
| 102 | */ |
| 103 | // Time complexity: O(1) |
| 104 | $observed = $this->getPersistence()->hExists($callId, $variableIdentifier); |
| 105 | $serializedData = $this->serializeVariableValue([$data]); |
| 106 | |
| 107 | if (!$observed) { |
| 108 | // Time complexity: O(1) |
| 109 | $this->getPersistence()->hSet($callId, $variableIdentifier, $serializedData); |
| 110 | } else { |
| 111 | // Time complexity: O(1) |
| 112 | $variableObservations = $this->unserializeVariableValue( |
| 113 | $this->getPersistence()->hGet($callId, $variableIdentifier) |
| 114 | ); |
| 115 | $unserializedData = $this->unserializeVariableValue($serializedData); |
| 116 | |
| 117 | if (in_array($unserializedData[0], $variableObservations, false)) { |
| 118 | throw new DuplicateVariableException( |
| 119 | sprintf('An identical result variable already exists. CallId:%s', $callId) |
| 120 | ); |
| 121 | } |
| 122 | |
| 123 | $variableObservations[] = $data; |
| 124 | // Time complexity: O(1) |
| 125 | $this->getPersistence()->hSet( |
| 126 | $callId, |
| 127 | $variableIdentifier, |
| 128 | $this->serializeVariableValue($variableObservations) |
| 129 | ); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Ids must be delegated on key value persistency as we may want to load balance and keep unique identifier |
| 135 | */ |
| 136 | public function spawnResult() |
| 137 | { |
| 138 | return 'id_' . $this->getPersistence()->incr(self::PREFIX_RESULT_ID); |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * @param type $deliveryResultIdentifier |
| 143 | * lis_result_sourcedid |
| 144 | * @param type $test |
| 145 | * ignored |
| 146 | * @param taoResultServer_models_classes_Variable $testVariable |
| 147 | * @param type $callIdTest |
| 148 | * ignored |
| 149 | */ |
| 150 | public function storeTestVariable( |
| 151 | $deliveryResultIdentifier, |
| 152 | $test, |
| 153 | taoResultServer_models_classes_Variable $testVariable, |
| 154 | $callIdTest |
| 155 | ) { |
| 156 | if (! ($testVariable->isSetEpoch())) { |
| 157 | $testVariable->setEpoch(microtime()); |
| 158 | } |
| 159 | |
| 160 | $variable = new TestVariableStorable($deliveryResultIdentifier, $test, $testVariable, $callIdTest); |
| 161 | |
| 162 | $this->storeVariableKeyValue($callIdTest, $variable->getIdentifier(), $variable); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * @param $deliveryResultIdentifier |
| 167 | * @param $test |
| 168 | * @param array $testVariables |
| 169 | * @param $callIdTest |
| 170 | */ |
| 171 | public function storeTestVariables($deliveryResultIdentifier, $test, array $testVariables, $callIdTest) |
| 172 | { |
| 173 | foreach ($testVariables as $testVariable) { |
| 174 | $this->storeTestVariable($deliveryResultIdentifier, $test, $testVariable, $callIdTest); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * retrieve specific parameters from the resultserver to configure the storage |
| 180 | */ |
| 181 | /*sic*/ |
| 182 | public function configure($callOptions = []) |
| 183 | { |
| 184 | } |
| 185 | |
| 186 | public function storeRelatedTestTaker($deliveryResultIdentifier, $testTakerIdentifier) |
| 187 | { |
| 188 | $this->getPersistence()->hmSet(self::PREFIX_TESTTAKER . $deliveryResultIdentifier, [ |
| 189 | 'deliveryResultIdentifier' => $deliveryResultIdentifier, |
| 190 | 'testTakerIdentifier' => $testTakerIdentifier, |
| 191 | ]); |
| 192 | } |
| 193 | |
| 194 | public function storeRelatedDelivery($deliveryResultIdentifier, $deliveryIdentifier) |
| 195 | { |
| 196 | $this->getPersistence()->hmSet(self::PREFIX_DELIVERY . $deliveryResultIdentifier, [ |
| 197 | 'deliveryResultIdentifier' => $deliveryResultIdentifier, |
| 198 | 'deliveryIdentifier' => $deliveryIdentifier, |
| 199 | ]); |
| 200 | } |
| 201 | |
| 202 | public function storeItemVariable( |
| 203 | $deliveryResultIdentifier, |
| 204 | $test, |
| 205 | $item, |
| 206 | taoResultServer_models_classes_Variable $itemVariable, |
| 207 | $callIdItem |
| 208 | ) { |
| 209 | if (! ($itemVariable->isSetEpoch())) { |
| 210 | $itemVariable->setEpoch(microtime()); |
| 211 | } |
| 212 | |
| 213 | $variable = new ItemVariableStorable($deliveryResultIdentifier, $test, $itemVariable, $item, $callIdItem); |
| 214 | |
| 215 | $this->storeVariableKeyValue($callIdItem, $variable->getIdentifier(), $variable); |
| 216 | } |
| 217 | |
| 218 | public function storeItemVariables($deliveryResultIdentifier, $test, $item, array $itemVariables, $callIdItem) |
| 219 | { |
| 220 | foreach ($itemVariables as $itemVariable) { |
| 221 | $this->storeItemVariable($deliveryResultIdentifier, $test, $item, $itemVariable, $callIdItem); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * @param string|array one or more callIds (item execution identifier) |
| 227 | * @param mixed $callId |
| 228 | * |
| 229 | * @return array keys as variableIdentifier , values is an array of observations , |
| 230 | * each observation is an object with deliveryResultIdentifier, test, |
| 231 | * taoResultServer_models_classes_Variable variable, callIdTest |
| 232 | * Array |
| 233 | ( |
| 234 | [LtiOutcome] => Array |
| 235 | ( |
| 236 | [0] => stdClass Object |
| 237 | ( |
| 238 | [deliveryResultIdentifier] => con-777:::rlid-777:::777777 |
| 239 | [test] => http://tao26/tao26.rdf#i1402389674744647 |
| 240 | [variable] => taoResultServer_models_classes_OutcomeVariable Object |
| 241 | ( |
| 242 | [normalMaximum] => |
| 243 | [normalMinimum] => |
| 244 | [value] => MC41 |
| 245 | [identifier] => LtiOutcome |
| 246 | [cardinality] => single |
| 247 | [baseType] => float |
| 248 | [epoch] => 0.10037600 1402390997 |
| 249 | ) |
| 250 | [callIdTest] => http://tao26/tao26.rdf#i14023907995907103 |
| 251 | ) |
| 252 | |
| 253 | ) |
| 254 | |
| 255 | ) |
| 256 | */ |
| 257 | public function getVariables($callId) |
| 258 | { |
| 259 | $variables = []; |
| 260 | |
| 261 | if (is_array($callId)) { |
| 262 | foreach ($callId as $id) { |
| 263 | $variables = array_merge($variables, $this->getVariables($id)); |
| 264 | } |
| 265 | } else { |
| 266 | $tmpVariables = $this->getPersistence()->hGetAll(self::PREFIX_CALL_ID . $callId); |
| 267 | |
| 268 | foreach ($tmpVariables as $variableIdentifier => $variableObservations) { |
| 269 | $observations = $this->unserializeVariableValue($variableObservations); |
| 270 | |
| 271 | foreach ($observations as $key => $observation) { |
| 272 | $observation->variable = unserialize($observation->variable); |
| 273 | $observation->uri .= static::PROPERTY_SEPARATOR . $observation->variable->getIdentifier(); |
| 274 | } |
| 275 | |
| 276 | $variables[$callId . $variableIdentifier] = $observations; |
| 277 | } |
| 278 | |
| 279 | unset($tmpVariables); |
| 280 | } |
| 281 | |
| 282 | return $variables; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * @param string|array $deliveryResultIdentifier |
| 287 | * |
| 288 | * @return array |
| 289 | */ |
| 290 | public function getDeliveryVariables($deliveryResultIdentifier) |
| 291 | { |
| 292 | $variables = []; |
| 293 | |
| 294 | if (is_array($deliveryResultIdentifier)) { |
| 295 | $deliveryVariables = []; |
| 296 | |
| 297 | foreach ($deliveryResultIdentifier as $id) { |
| 298 | $deliveryVariables[] = $this->getDeliveryVariables($id); |
| 299 | } |
| 300 | $variables = array_merge(...$deliveryVariables); |
| 301 | } else { |
| 302 | $keys = $this->getPersistence()->keys(self::PREFIX_CALL_ID . $deliveryResultIdentifier . '.*'); |
| 303 | |
| 304 | foreach ($keys as $key) { |
| 305 | $prefixedVariables = $this->getVariables(str_replace(self::PREFIX_CALL_ID, '', $key)); |
| 306 | |
| 307 | foreach ($prefixedVariables as $varId => $variable) { |
| 308 | $variables[$variable[0]->uri . $varId] = $variable; |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | return $variables; |
| 314 | } |
| 315 | |
| 316 | public function getVariable($callId, $variableIdentifier) |
| 317 | { |
| 318 | $observations = $this->unserializeVariableValue( |
| 319 | $this->getPersistence()->hGet(self::PREFIX_CALL_ID . $callId, $variableIdentifier) |
| 320 | ); |
| 321 | |
| 322 | foreach ($observations as $key => $observation) { |
| 323 | $observation->variable = unserialize($observation->variable); |
| 324 | $observations[$key] = $observation; |
| 325 | } |
| 326 | |
| 327 | return $observations; |
| 328 | } |
| 329 | |
| 330 | public function getTestTaker($deliveryResultIdentifier) |
| 331 | { |
| 332 | $testTaker = $this->getTestTakerArray($deliveryResultIdentifier); |
| 333 | |
| 334 | return $testTaker['testTakerIdentifier']; |
| 335 | } |
| 336 | |
| 337 | public function getDelivery($deliveryResultIdentifier) |
| 338 | { |
| 339 | $delivery = $this->getDeliveryArray($deliveryResultIdentifier); |
| 340 | |
| 341 | return $delivery['deliveryIdentifier']; |
| 342 | } |
| 343 | |
| 344 | public function getTestTakerArray($deliveryResultIdentifier) |
| 345 | { |
| 346 | return $this->getPersistence()->hGetAll(self::PREFIX_TESTTAKER . $deliveryResultIdentifier); |
| 347 | } |
| 348 | |
| 349 | public function getDeliveryArray($deliveryResultIdentifier) |
| 350 | { |
| 351 | return $this->getPersistence()->hGetAll(self::PREFIX_DELIVERY . $deliveryResultIdentifier); |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * @return array the list of item executions ids (across all results) |
| 356 | * o(n) do not use real time (postprocessing) |
| 357 | */ |
| 358 | |
| 359 | public function getAllCallIds() |
| 360 | { |
| 361 | $keys = $this->getPersistence()->keys(self::PREFIX_CALL_ID . '*'); |
| 362 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_CALL_ID); |
| 363 | |
| 364 | return $keys; |
| 365 | } |
| 366 | /** |
| 367 | * @return array each element is a two fields array deliveryResultIdentifier, testTakerIdentifier |
| 368 | */ |
| 369 | public function getAllTestTakerIds() |
| 370 | { |
| 371 | $deliveryResults = []; |
| 372 | $keys = $this->getPersistence()->keys(self::PREFIX_TESTTAKER . '*'); |
| 373 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_TESTTAKER); |
| 374 | |
| 375 | foreach ($keys as $key) { |
| 376 | $deliveryResults[$key] = $this->getTestTakerArray($key); |
| 377 | } |
| 378 | |
| 379 | return $deliveryResults; |
| 380 | } |
| 381 | /** |
| 382 | * @return array each element is a two fields array deliveryResultIdentifier, deliveryIdentifier |
| 383 | */ |
| 384 | public function getAllDeliveryIds() |
| 385 | { |
| 386 | $deliveryResults = []; |
| 387 | $keys = $this->getPersistence()->keys(self::PREFIX_DELIVERY . '*'); |
| 388 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_DELIVERY); |
| 389 | |
| 390 | foreach ($keys as $key) { |
| 391 | $deliveryResults[$key] = $this->getDeliveryArray($key); |
| 392 | } |
| 393 | |
| 394 | return $deliveryResults; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * helper |
| 399 | * |
| 400 | * @param mixed $value |
| 401 | * @param mixed $key |
| 402 | * @param mixed $prefix |
| 403 | */ |
| 404 | private function subStrPrefix(&$value, $key, $prefix) |
| 405 | { |
| 406 | $value = str_replace($prefix, '', $value); |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Get only one property from a variable |
| 411 | * |
| 412 | * @param string $variableId on which we want the property |
| 413 | * @param string $property to retrieve |
| 414 | * |
| 415 | * @return int|string the property retrieved |
| 416 | */ |
| 417 | public function getVariableProperty($variableId, $property) |
| 418 | { |
| 419 | list($itemUri, $propertyName) = $this->extractResultVariableProperty($variableId); |
| 420 | $response = $this->unserializeVariableValue( |
| 421 | $this->getPersistence()->hGet( |
| 422 | self::PREFIX_CALL_ID . $itemUri, |
| 423 | $propertyName |
| 424 | ) |
| 425 | ); |
| 426 | $variable = unserialize($response[0]->variable); |
| 427 | |
| 428 | $getter = 'get' . ucfirst($property); |
| 429 | |
| 430 | if (method_exists($variable, $getter)) { |
| 431 | return $variable->$getter(); |
| 432 | } |
| 433 | |
| 434 | return ''; |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * Returns the variable property key from the absolute variable key. |
| 439 | * |
| 440 | * @param string $variableId |
| 441 | * |
| 442 | * @return array |
| 443 | */ |
| 444 | public function extractResultVariableProperty($variableId) |
| 445 | { |
| 446 | $variableIds = explode('http://', $variableId); |
| 447 | $parts = explode(static::PROPERTY_SEPARATOR, $variableIds[2]); |
| 448 | |
| 449 | $itemUri = $variableIds[0] . 'http://' . $parts[0]; |
| 450 | $propertyName = empty($parts[1]) ? 'RESPONSE' : $parts[1]; |
| 451 | |
| 452 | return [ |
| 453 | $itemUri, |
| 454 | $propertyName, |
| 455 | ]; |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * @todo Only works for QTI Tests, fix this in a more generic way |
| 460 | * |
| 461 | * (non-PHPdoc) |
| 462 | * |
| 463 | * @see \oat\taoResultServer\models\classes\ResultManagement::getRelatedItemCallIds() |
| 464 | * |
| 465 | * @param mixed $deliveryResultIdentifier |
| 466 | */ |
| 467 | public function getRelatedItemCallIds($deliveryResultIdentifier) |
| 468 | { |
| 469 | $keys = $this->getPersistence()->keys(self::PREFIX_CALL_ID . $deliveryResultIdentifier . '.*'); |
| 470 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_CALL_ID); |
| 471 | |
| 472 | return $keys; |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * @todo Only works for QTI Tests, fix this in a more generic way |
| 477 | * |
| 478 | * (non-PHPdoc) |
| 479 | * |
| 480 | * @see \oat\taoResultServer\models\classes\ResultManagement::getRelatedTestCallIds() |
| 481 | * |
| 482 | * @param mixed $deliveryResultIdentifier |
| 483 | */ |
| 484 | public function getRelatedTestCallIds($deliveryResultIdentifier) |
| 485 | { |
| 486 | $keys = $this->getPersistence()->keys(self::PREFIX_CALL_ID . $deliveryResultIdentifier); |
| 487 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_CALL_ID); |
| 488 | |
| 489 | return $keys; |
| 490 | } |
| 491 | |
| 492 | public function getResultByDelivery($delivery, $options = []) |
| 493 | { |
| 494 | $returnValue = []; |
| 495 | $keys = $this->getPersistence()->keys(self::PREFIX_DELIVERY . '*'); |
| 496 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_DELIVERY); |
| 497 | |
| 498 | foreach ($keys as $key) { |
| 499 | $deliveryExecution = $this->getDelivery($key); |
| 500 | |
| 501 | if (empty($delivery) || in_array($deliveryExecution, $delivery)) { |
| 502 | $returnValue[] = [ |
| 503 | 'deliveryResultIdentifier' => $key, |
| 504 | 'testTakerIdentifier' => $this->getTestTaker($key), |
| 505 | 'deliveryIdentifier' => $deliveryExecution, |
| 506 | ]; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | return $returnValue; |
| 511 | } |
| 512 | |
| 513 | public function countResultByDelivery($delivery) |
| 514 | { |
| 515 | $count = 0; |
| 516 | $keys = $this->getPersistence()->keys(self::PREFIX_DELIVERY . '*'); |
| 517 | array_walk($keys, 'self::subStrPrefix', self::PREFIX_DELIVERY); |
| 518 | |
| 519 | foreach ($keys as $key) { |
| 520 | $deliveryExecution = $this->getDelivery($key); |
| 521 | |
| 522 | if (empty($delivery) || in_array($deliveryExecution, $delivery)) { |
| 523 | $count++; |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | return $count; |
| 528 | } |
| 529 | |
| 530 | /** |
| 531 | * Remove the result and all the related variables |
| 532 | * |
| 533 | * @param string $deliveryResultIdentifier The identifier of the delivery execution |
| 534 | * |
| 535 | * @return boolean if the deletion was successful or not |
| 536 | */ |
| 537 | public function deleteResult($deliveryResultIdentifier) |
| 538 | { |
| 539 | $return = true; |
| 540 | |
| 541 | foreach ($this->getRelatedTestCallIds($deliveryResultIdentifier) as $key) { |
| 542 | $return = $return && $this->getPersistence()->del(self::PREFIX_CALL_ID . $key); |
| 543 | } |
| 544 | |
| 545 | foreach ($this->getRelatedItemCallIds($deliveryResultIdentifier) as $key) { |
| 546 | $return = $return && $this->getPersistence()->del(self::PREFIX_CALL_ID . $key); |
| 547 | } |
| 548 | $return = $return && $this->getPersistence()->del(self::PREFIX_DELIVERY . $deliveryResultIdentifier); |
| 549 | $return = $return && $this->getPersistence()->del(self::PREFIX_TESTTAKER . $deliveryResultIdentifier); |
| 550 | |
| 551 | return $return; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * @param $value |
| 556 | * |
| 557 | * @return mixed |
| 558 | */ |
| 559 | protected function unserializeVariableValue($value) |
| 560 | { |
| 561 | return json_decode($value); |
| 562 | } |
| 563 | |
| 564 | /** |
| 565 | * @param $value |
| 566 | * |
| 567 | * @return string |
| 568 | */ |
| 569 | protected function serializeVariableValue($value) |
| 570 | { |
| 571 | return json_encode($value); |
| 572 | } |
| 573 | } |