public function run(App $previousApp = null)
{
//Make sure all correct feature aliases are registered
$this->_registerFeatureAliases();
//We will sort the features by dependency on other features
//and initialize them in the correct order
//First we create an instance of all features.
/**
* @var \Tale\App\FeatureBase[] $features
*/
$features = [];
foreach ($this->getOption('features') as $name => $options) {
//Aliases are resolved.
$className = $this->_featureFactory->resolveClassName($name);
//We don't want duplicate instances. Rather create a new feature
//It's better for unique identification
if (isset($features[$className])) {
throw new RuntimeException("Failed to add feature {$name}({$className}): Feature does already exist");
}
//This creates the actual instance via Tale\Factory
$feature = $this->_featureFactory->createInstance($className, [$this]);
//We can pass a string as the options to use a config file
if (is_string($options)) {
$feature->appendOptionFile($options, true);
} else {
if (is_array($options)) {
$feature->appendOptions($options, true);
} else {
throw new RuntimeException("Failed to initialize feature {$name}({$className}): " . "Config needs to be a path to a file or an option array");
}
}
$features[] = $feature;
}
//All features are instanced and got all the options they will get
//at this point.
//Now we sort the features by dependencies.
//TODO: Circular dependencies probably f**k up.
ArrayUtil::mergeSort($features, [__CLASS__, 'compareFeatures']);
$classes = array_map('get_class', $features);
$features = array_combine($classes, $features);
//Now we can initialize the features
//Since our deps are ordered now, we can just iterate
foreach ($features as $feature) {
//First append our dependencies
foreach ($feature->getDependencies() as $name => $className) {
if (isset($features[$className])) {
$feature->setDependency($name, $features[$className]);
}
}
//Now initialize the feature
//This is the possibility to add events etc.
$feature->init();
}
//This is only sorting! We dont ensure, that the feature exists.
//The feature has to do that by itself (through an easy way, look at it)
//Put together our event args
$args = ['app' => $this, 'previousApp' => $previousApp];
//First, we prepare (and let features prepare)
if ($this->emit('beforeRun', new Event\Args($args))) {
$this->_setPhpOptions();
//Then we run
if ($this->emit('run', new Event\Args($args))) {
//Clear our features
$this->_features = null;
//Allow clean-up at the end (Notice that the "true"
//makes it reverse
$this->emit('afterRun', new Event\Args($args), true);
}
}
return $this;
}