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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\ActiveRecord;
/**
* Provides a {@link Model} instance.
*/
class ModelProvider
{
/**
* @var callable {@link Model} provider
*/
static private $provider;
/**
* Defines the {@link Model} provider.
*
* @param callable $provider
*
* @return callable The previous provider, or `null` if none was defined.
*/
static public function define(callable $provider)
{
$previous = self::$provider;
self::$provider = $provider;
return $previous;
}
/**
* Returns the current provider.
*
* @return callable|null
*/
static public function defined()
{
return self::$provider;
}
/**
* Undefine the provider.
*/
static public function undefine()
{
self::$provider = null;
}
/**
* Returns a {@link Model} instance using the provider.
*
* @param string $id Model identifier.
*
* @return Model
*
* @throws ModelNotDefined if the model cannot be provided.
*/
static public function provide($id)
{
$provider = self::$provider;
if (!$provider)
{
throw new \LogicException("No provider is defined yet. Please define one with `ModelProvider::define(\$provider)`.");
}
$model = $provider($id);
if (!$model)
{
throw new ModelNotDefined($id);
}
return $model;
}
}