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<?php |
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/** |
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* Config class. |
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* |
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* @package SugiPHP.Config |
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* @author Plamen Popov <[email protected]> |
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* @license http://opensource.org/licenses/mit-license.php (MIT License) |
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*/ |
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namespace SugiPHP\Config; |
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class Config |
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{ |
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protected $registry = array(); |
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protected $loaders = array(); |
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/** |
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* Creates a Config instance. |
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* |
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* @param array|LoaderInterface|null $loaders array of LoaderInterface |
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*/ |
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public function __construct($loaders = null) |
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{ |
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if (!is_null($loaders)) { |
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if (is_array($loaders)) { |
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foreach ($loaders as $loader) { |
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$this->addLoader($loader); |
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} |
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} else { |
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$this->addLoader($loaders); |
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} |
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} |
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} |
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public function addLoader(LoaderInterface $loader) |
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{ |
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$this->loaders[] = $loader; |
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} |
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/** |
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* Returns loaded config option. If the key is not found it checks if registered loaders can |
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* find the key. |
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* |
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* @param string $key |
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* @param mixed $default - the value to be returned if the $key is not found |
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* |
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* @return mixed |
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*/ |
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public function get($key, $default = null) |
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{ |
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if (empty($key)) { |
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return $default; |
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} |
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$parts = explode(".", $key); |
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$file = array_shift($parts); |
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if (!isset($this->registry[$file])) { |
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$this->registry[$file] = $this->discover($file); |
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} |
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$res = $this->parse($key); |
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return is_null($res) ? $default : $res; |
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} |
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/** |
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* Registers a config variable |
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* |
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* @param string $key |
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* @param mixed $value |
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* |
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* @return void |
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*/ |
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public function set($key, $value) |
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{ |
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if (empty($key)) { |
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throw new Exception("Key must be set"); |
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} |
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$parts = array_reverse(explode(".", $key)); |
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$file = array_pop($parts); |
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// we'll try to load a configuration file (if exists) |
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if (!isset($this->registry[$file])) { |
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$this->registry[$file] = $this->discover($file); |
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} |
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foreach ($parts as $part) { |
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$value = array($part => $value); |
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} |
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if (is_array($this->registry[$file]) && (is_array($value))) { |
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$this->registry[$file] = array_replace_recursive($this->registry[$file], $value); |
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} else { |
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$this->registry[$file] = $value; |
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} |
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} |
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/** |
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* Tries to find needed resource by looping each of registered loaders. |
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* |
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* @param string $resource |
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* |
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* @return array|null Returns null if resource is not found |
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*/ |
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protected function discover($resource) |
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{ |
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foreach ($this->loaders as $loader) { |
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$res = $loader->load($resource); |
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if (!is_null($res)) { |
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return $res; |
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} |
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} |
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} |
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/** |
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* Search for a key with dot notation in the array. If the key is not found NULL is returned |
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* |
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* @param string $key |
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* |
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* @return mixed|null Returns NULL if the key is not found. |
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*/ |
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protected function parse($key) |
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{ |
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$values = $this->registry; |
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$parts = explode(".", $key); |
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foreach ($parts as $part) { |
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if ($part === "") { |
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return $values; |
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} |
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if (!is_array($values) || !array_key_exists($part, $values)) { |
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return ; |
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} |
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$values = $values[$part]; |
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} |
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return $values; |
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} |
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} |
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SugiPHP /
Config
