/**
* Creates context object if context config passed to `$context` param.
* @param mixed $context the context object or config for creating it.
* @param string $name the name of context.
* @return Context instantiated instance of Context.
* @throws InvalidConfigException if context has invalid config.
*/
protected function instantiateContext($context, $name)
{
if (!$context instanceof Context) {
if (is_array($context)) {
$defaultContext = is_array($this->defaultContext) ? $this->defaultContext : ['class' => $this->defaultContext];
$context = ArrayHelper::merge($defaultContext, $context);
}
$context = Yii::createObject($context);
if (!$context instanceof Context) {
throw new InvalidConfigException("Context '{$name}' has invalid config. It must be an instance of " . Context::className() . ' or a config for creating it.');
}
if ($context->name === null) {
$context->name = $name;
}
}
return $context;
}
/**
* Changes structure of base class.
* @see [[_changeStructure()]]
*
* Checks required property `$context`.
* @throws InvalidConfigException if required property `$context` is missed or is incorrect.
*/
public function init()
{
$this->_changeStructure();
parent::init();
if (!$this->context instanceof Context) {
throw new InvalidConfigException('An instance of ' . Context::className() . ' is required for ' . get_class($this) . '.');
}
}