/**
* Emits a signal.
*
* @param object $signal \XPSPL\SIG
*
* @return object Event
*/
public function emit(SIG $signal)
{
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug(sprintf('%s emitted', $signal));
}
// Store the history of the signal
if (false !== $this->_history) {
$this->_history[] = [$signal, microtime()];
}
// Set child status
if (count($this->_signal) > 1) {
$signal->set_parent($this->current_signal());
}
// Check if signal is installed
$memory = $this->find_signal_database($signal);
if (null === $memory) {
$memory = new \XPSPL\database\Processes();
} else {
if (XPSPL_DEBUG) {
logger(XPSPL_LOG)->debug('Signal with no installed processes emitted');
}
}
// Evaluate complex signals
$evaluated = $this->evaluate_signals($signal);
if (null !== $evaluated) {
foreach ($evaluated as $_db) {
$memory->merge($_db);
}
}
// Execute if we have processes
if ($memory->count() > 0) {
// Set as currently executing signal
$this->_signal[] = $signal;
// Execute
$this->_execute($signal, $memory);
// Remove once finished
array_pop($this->_signal);
}
return $signal;
}
/**
* Determine if the given database processes are exhausted.
*
* @param object $queue \XPSPL\database\Processes
*
* @return boolean
*/
public function are_processes_exhausted(\XPSPL\database\Processes $database)
{
if ($database->count() === 0) {
return true;
}
$database->reset();
while ($database->valid()) {
if ($database->current() instanceof \XPSPL\database\Processes) {
if (!$this->are_processes_exhausted($database->current())) {
return false;
}
} elseif (!$database->current()->is_exhausted()) {
return false;
}
$database->next();
}
return true;
}
