/**
* Add a dependency where the value in one field can change settings for the other field
*
* Dependencies are processed in the order they are added
*
* @param mixed $dependency \MUtil\Model\Dependency\DependencyInterface or string or array to create one
* @param mixed $dependsOn Optional string field name or array of fields that do the changing
* @param array $effects Optional array of field => array(setting) of settings are changed, array of whatever
* the dependency accepts as an addEffects() argument
* @param mixed $key A key to identify the specific dependency.
* @return int The actual key used.
*/
public function addDependency($dependency, $dependsOn = null, array $effects = null, $key = null)
{
if (!$dependency instanceof DependencyInterface) {
$loader = \MUtil_Model::getDependencyLoader();
if (is_array($dependency)) {
$parameters = $dependency;
$className = array_shift($parameters);
} else {
$parameters = array();
$className = (string) $dependency;
}
$dependency = $loader->createClass($className, $parameters);
}
if (null !== $dependsOn) {
$dependency->addDependsOn($dependsOn);
}
if (is_array($effects)) {
$dependency->addEffecteds($effects);
}
if (null === $key) {
$keys = array_filter(array_keys($this->_model_dependencies), 'is_int');
$key = ($keys ? max($keys) : 0) + 10;
}
$dependency->applyToModel($this);
$this->_model_dependencies[$key] = $dependency;
return $key;
}
