function WorkflowTypeBase::deleteState

Overrides WorkflowTypeInterface::deleteState

File

core/modules/workflows/src/Plugin/WorkflowTypeBase.php, line 194

Class

WorkflowTypeBase

A base class for Workflow type plugins.

Namespace

Code

public function deleteState($state_id) {
    if (!$this->hasState($state_id)) {
        throw new \InvalidArgumentException("The state '{$state_id}' does not exist in workflow.");
    }
    if (count($this->configuration['states']) === 1) {
        throw new \InvalidArgumentException("The state '{$state_id}' can not be deleted from workflow as it is the only state.");
    }
    foreach ($this->configuration['transitions'] as $transition_id => $transition) {
        if ($transition['to'] === $state_id) {
            $this->deleteTransition($transition_id);
            continue;
        }
        $from_key = array_search($state_id, $transition['from'], TRUE);
        if ($from_key !== FALSE) {
            // Remove state from the from array.
            unset($transition['from'][$from_key]);
            if (empty($transition['from'])) {
                // There are no more 'from' entries, remove the transition.
                $this->deleteTransition($transition_id);
                continue;
            }
            // We changed the from state, update the transition.
            $this->setTransitionFromStates($transition_id, $transition['from']);
        }
    }
    unset($this->configuration['states'][$state_id]);
    return $this;
}