function testUnder()
{
$transition = new Transition('A', 'B');
$transition->setStates(array('A', 'C', 'D', 'F'));
$transition->addGuard('atMost', 4, array('C', 'D', 'E', 'F', 'G'));
$this->assertEquals(array(), $transition->explain());
}
function testImpossibleCondition()
{
$transition = new Transition('A', 'B');
$transition->setStates(array('A', 'C', 'D', 'F'));
$transition->addGuard('atLeast', 4, array('C', 'D', 'E'));
$this->assertEquals(array(array('class' => 'invalid', 'count' => 4, 'set' => array('C', 'D', 'E'))), $transition->explain());
}
function triggerTransition( $transitionId, $object, $type = null )
{
// Make sure the transition exists
if ( ! $transition = $this->getTransition($transitionId) ) {
return false;
}
// Make sure the user can use it
$perms = Perms::get(array('type' => 'transition', 'object' => $transitionId));
if ( ! $perms->trigger_transition ) {
return false;
}
// Verify that the states are consistent
$states = $this->getCurrentStates($object, $type);
$tr = new Transition($transition['from'], $transition['to']);
$tr->setStates($states);
foreach ( $transition['guards'] as $guard ) {
call_user_func_array(array($tr, 'addGuard'), $guard);
}
if ( ! $tr->isReady() ) {
return false;
}
$this->addState($transition['to'], $object, $type);
if ( ! $transition['preserve'] ) {
$this->removeState($transition['from'], $object, $type);
}
return true;
}
