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<?php |
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namespace roaresearch\yii2\workflow\models; |
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use roaresearch\yii2\rmdb\models\Entity; |
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use yii\{base\InvalidConfigException, db\ActiveQuery}; |
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/** |
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* Model class for process which change stages depending on a worklow |
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* |
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* @property int workflowId |
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* @property Workflow workflow |
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* @property WorkLog[] $workLogs |
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* @property WorkLog $activeWorkLog |
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*/ |
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abstract class Process extends Entity |
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{ |
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/** |
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* @var WorkLog model used internally to create the initial WorkLog |
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* @see hasInitialWorkLog() |
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*/ |
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private $initialWorkLog; |
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/** |
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* @var bool Whether or not autogenerate the initial worklog. It only works |
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* on new records. |
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* @see hasInitialWorkLog() |
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*/ |
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protected $autogenerateInitialWorklog = true; |
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/** |
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* @return string full class name of the class to be used for the relation |
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* `getWorkflow()`. |
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*/ |
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public function workflowClass(): string |
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{ |
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return Workflow::class; |
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} |
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/** |
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* @return string full class name of the class to be used to store the |
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* assignment records. |
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*/ |
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abstract protected function assignmentClass(): string; |
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/** |
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* @return string full class name of the class to be used to store the |
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* WorkLog records. |
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*/ |
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abstract protected function workLogClass(): string; |
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/** |
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* @return int the id of the workflow this process belongs to. |
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*/ |
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abstract public function getWorkflowId(): int; |
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/** |
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* Determines if the current process record has the need of an initial |
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* worklog. If thats the case it autogenerates the initial worklog in case |
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* its not already autogenerated. |
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* |
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* @return bool whether the initial worklog was autogenerated. |
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*/ |
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private function hasInitialWorkLog(): bool |
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{ |
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if (!$this->autogenerateInitialWorklog || !$this->isNewRecord) { |
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return false; |
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} |
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if (null === $this->initialWorkLog) { |
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$this->initialWorkLog = $this->ensureWorkLog([ |
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'scenario' => WorkLog::SCENARIO_INITIAL, |
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]); |
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} |
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return true; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function load($data, $formName = null) |
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{ |
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if ($this->hasInitialWorklog()) { |
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$logLoad = $this->initialWorkLog->load($data, $formName); |
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return parent::load($data, $formName) || $logLoad; |
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} |
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return parent::load($data, $formName); |
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} |
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/** |
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* Whether the user is asigned to the process. |
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* |
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* @param ?int $userId |
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* @return bool |
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*/ |
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public function userAssigned(?int $userId): bool |
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{ |
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return !$this->getAssignments()->exists() // no one is assigned |
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|| $this->getAssignments() |
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->andWhere(['user_id' => $userId]) |
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->exists(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function validate($attributeNames = null, $clearErrors = true) |
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{ |
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$parentValidate = parent::validate($attributeNames, $clearErrors); |
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if ($this->hasInitialWorklog()) { |
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if ( |
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$this->initialWorkLog->validate($attributeNames, $clearErrors) |
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) { |
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return $parentValidate; |
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} |
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$this->addErrors($this->initialWorkLog->getErrors()); |
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return false; |
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} |
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return $parentValidate; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function transactions() |
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{ |
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return [ |
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self::SCENARIO_DEFAULT => self::OP_INSERT, |
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]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function afterSave($insert, $changedAttributes) |
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{ |
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parent::afterSave($insert, $changedAttributes); |
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if ($insert) { |
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$this->initialWorkLog->process_id = $this->id; |
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$this->initialWorkLog->save(false); // skip validation |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function init() |
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{ |
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if (!is_subclass_of($this->workLogClass(), WorkLog::class)) { |
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throw new InvalidConfigException( |
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static::class . '::workLogClass() must extend ' |
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. WorkLog::class |
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); |
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} |
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if (!is_subclass_of($this->assignmentClass(), Assignment::class)) { |
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throw new InvalidConfigException( |
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static::class . '::assignmentClass() must extend ' |
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. Assignment::class |
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); |
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} |
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parent::init(); |
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} |
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/** |
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* @return Workflow |
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*/ |
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public function getWorkflow(): Workflow |
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{ |
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$workflowClass = $this->workflowClass(); |
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return $workflowClass::findOne($this->getWorkflowId()); |
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} |
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/** |
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* @return ActiveQuery |
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*/ |
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public function getAssignments(): ActiveQuery |
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{ |
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return $this->hasMany($this->assignmentClass(), [ |
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'process_id' => 'id', |
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])->inverseOf('process'); |
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} |
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/** |
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* @return ActiveQuery |
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*/ |
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public function getWorkLogs(): ActiveQuery |
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{ |
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return $this->hasMany($this->workLogClass(), [ |
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'process_id' => 'id', |
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])->inverseOf('process'); |
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} |
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/** |
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* @return ActiveQuery |
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* @see https://dev.mysql.com/doc/refman/5.7/en/example-maximum-column-group-row.html |
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*/ |
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public function getActiveWorkLog(): ActiveQuery |
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{ |
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$query = $this->getWorkLogs()->alias('WorkLog'); |
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$query->multiple = false; |
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$workLogClass = $this->workLogClass(); |
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return $query->andWhere([ |
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'id' => $workLogClass::find() |
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->select(['MAX(id)']) |
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->alias('WorkLog_groupwise') |
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->andWhere('WorkLog.process_id = WorkLog_groupwise.process_id') |
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]); |
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} |
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/** |
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* Adds record to the WorkLog effectively transitioning the stage of the |
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* process. |
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* |
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* @param array|WorkLog the WorkLog the process will transit to or an array |
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* to create said WorkLog. |
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* @param bool $runValidation |
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*/ |
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public function flow(&$workLog, bool $runValidation = true) |
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{ |
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$workLog = $this->ensureWorkLog($workLog); |
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$workLog->scenario = WorkLog::SCENARIO_FLOW; |
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return $workLog->save($runValidation); |
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} |
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/** |
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* Ensures that the provided parameter is either an array to create a valid |
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* instance of the `workLogClass()` class. |
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* |
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* @param array|WorkLog $workLog |
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* @return WorkLog extending the class defined in `workLogClass()` |
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*/ |
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private function ensureWorkLog($workLog): WorkLog |
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{ |
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$workLogClass = $this->workLogClass(); |
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if (is_array($workLog)) { |
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$workLog = new $workLogClass($workLog); |
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} elseif (!$workLog instanceof $workLogClass) { |
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throw new InvalidParamException( |
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"Parameter must be an instance of {$workLogClass} or an " |
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. 'array to configure an instance' |
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); |
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} |
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$workLog->process_id = $this->id; |
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$workLog->populateRelation('process', $this); |
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return $workLog; |
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} |
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} |
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