/**
* Will return the script required by GraphViz (dot) to render the graph
*
* @param StateMachine $sm
* @return string
*/
public function render(StateMachine $sm)
{
$graph = new Digraph('G');
$graph->set('truecolor', true);
foreach ($sm->getStates() as $state) {
$graph->node($state->getValue(), $this->renderState($state, $this->profile['states']));
}
foreach ($sm->getStates() as $state) {
/** @var Event[] $connectors */
$connectors = array_merge($state->getEvents(), $state->getTimeOuts());
foreach ($connectors as $event) {
$p = $this->profile['events']['default'];
foreach ($this->profile['events']['exclusiveRoles'] as $exclusiveRole => $roleProfile) {
if ($event->isExclusiveTo($exclusiveRole)) {
$p = array_merge($p, $roleProfile);
break;
}
}
if ($event instanceof Timeout) {
$p = array_merge($p, $this->profile['events']['timeout']);
} elseif ($event->isRefresh()) {
$p = array_merge($p, $this->profile['events']['refresh']);
}
$fontcolor = $p['fontcolor'];
$fillcolor = $p['fillcolor'];
$color = $p['color'];
$style = $p['style'];
$graph->edge([$state->getValue(), $event->getTarget()], ['label' => chr(1) . '<<table border="0" cellspacing="0" cellpadding="2"><tr><td>' . $event->getLabel() . '</td></tr></table>>', 'margin' => 10, 'arrowsize' => 0.6, 'fontsize' => 9, 'fontname' => 'Helvetica Neue', 'fontcolor' => $fontcolor, 'fillcolor' => $fillcolor, 'color' => $color, 'style' => $style]);
}
}
return $graph->render();
}
/**
* @param string $name
* @param mixed $value
* @throws CannotGuessEventException
* @throws EventNotFoundException
* @throws InvalidSchemaException
* @throws TransitionException
* @throws \yii\base\UnknownPropertyException
* @throws exceptions\StateNotFoundException
* @throws null
*/
public function __set($name, $value)
{
if ($name === $this->virtAttr) {
$m = $this->owner;
// Value did not change - ignore
if ($m->{$this->attr} === $value) {
return;
}
// First time? Initialize SM for $value state
if ($m->{$this->attr} === null && $m->getIsNewRecord()) {
if ($value !== $this->sm->getInitialStateValue()) {
throw new InvalidValueException("This attribute is just entering the State Machine and must be set to {$this->sm->getInitialStateValue()}");
}
$context = $this->initStateMachine();
} else {
// Not first time, try to trigger for $value
$state = $this->sm->getState($m->{$this->attr});
if (!$state) {
throw new InvalidSchemaException("Cannot load current state {$m->{$this->attr}}");
}
$event = $state->guessEvent($value, $this->internalGetUserRole(Yii::$app->user->identity));
$context = $this->trigger($event);
}
// Migrate the context errors to the virtual attribute
foreach ($context->errors as $attr => $error) {
$m->addError($this->virtAttr, $error);
}
} else {
parent::__set($name, $value);
}
}
/**
* @return State
* @throws exceptions\InvalidSchemaException
* @throws exceptions\StateNotFoundException
*/
public function getTargetState()
{
return $this->sm->getState($this->target);
}
/**
* @return interfaces\StateMachineEvent[]
*/
public function getPossibleEvents()
{
return $this->sm->getState($this->model->{$this->attr})->getEvents($this->role, $this);
}