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<?php |
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/** |
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* Abstract Config Object |
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* |
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* @package BrightNucleus\Config |
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* @author Alain Schlesser <[email protected]> |
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* @license GPL-2.0+ |
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* @link http://www.brightnucleus.com/ |
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* @copyright 2016 Alain Schlesser, Bright Nucleus |
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*/ |
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namespace BrightNucleus\Config; |
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use ArrayObject; |
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use Assert; |
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use BrightNucleus\Exception\BadMethodCallException; |
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use BrightNucleus\Exception\OutOfRangeException; |
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use Exception; |
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/** |
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* Config loader used to load config PHP files as objects. |
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* |
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* @since 0.1.0 |
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* |
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* @package BrightNucleus\Config |
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* @author Alain Schlesser <[email protected]> |
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*/ |
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abstract class AbstractConfig extends ArrayObject implements ConfigInterface |
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{ |
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/** |
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* Array of strings that are used as delimiters to parse configuration keys. |
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* |
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* @since 0.1.6 |
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* |
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* @var array |
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*/ |
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protected $delimiter = ['\\', '/', '.']; |
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/** |
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* Instantiate the AbstractConfig object. |
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* |
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* @since 0.1.0 |
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* @since 0.1.6 Accepts a delimiter to parse configuration keys. |
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* |
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* @param array $config Array with settings. |
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* @param string[]|string|null $delimiter A string or array of strings that are used as delimiters to parse |
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* configuration keys. Defaults to "\", "/" & ".". |
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*/ |
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public function __construct(array $config, $delimiter = null) |
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{ |
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// Make sure the config entries can be accessed as properties. |
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parent::__construct($config, ArrayObject::ARRAY_AS_PROPS); |
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if (null !== $delimiter) { |
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$this->delimiter = (array)$delimiter; |
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} |
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} |
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/** |
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* Get the value of a specific key. |
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* |
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* To get a value several levels deep, add the keys for each level as a comma-separated list. |
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* |
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* @since 0.1.0 |
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* @since 0.1.4 Accepts list of keys. |
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* |
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* @param string ... List of keys. |
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* @return mixed |
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* @throws BadMethodCallException If no argument was provided. |
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* @throws OutOfRangeException If an unknown key is requested. |
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*/ |
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public function getKey() |
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{ |
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$keys = $this->validateKeys(func_get_args()); |
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$keys = array_reverse($keys); |
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$array = $this->getArrayCopy(); |
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while (count($keys) > 0) { |
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$key = array_pop($keys); |
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$array = $array[$key]; |
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} |
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return $array; |
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} |
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/** |
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* Check whether the Config has a specific key. |
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* |
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* To check a value several levels deep, add the keys for each level as a comma-separated list. |
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* |
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* @since 0.1.0 |
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* @since 0.1.4 Accepts list of keys. |
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* |
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* @param string ... List of keys. |
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* @return bool |
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*/ |
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public function hasKey() |
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{ |
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try { |
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$keys = array_reverse($this->getKeyArguments(func_get_args())); |
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$array = $this->getArrayCopy(); |
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while (count($keys) > 0) { |
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$key = array_pop($keys); |
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if (! array_key_exists($key, $array)) { |
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return false; |
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} |
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$array = $array[$key]; |
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} |
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} catch (Exception $exception) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Get a (multi-dimensional) array of all the configuration settings. |
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* |
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* @since 0.1.4 |
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* |
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* @return array |
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*/ |
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public function getAll() |
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{ |
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return $this->getArrayCopy(); |
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} |
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/** |
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* Get the an array with all the keys |
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* |
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* @since 0.1.0 |
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* @return array |
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*/ |
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public function getKeys() |
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{ |
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return array_keys((array)$this); |
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} |
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/** |
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* Get a new config at a specific sub-level. |
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* |
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* @since 0.1.13 |
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* |
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* @param string ... List of keys. |
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* @return ConfigInterface |
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* @throws BadMethodCallException If no argument was provided. |
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* @throws OutOfRangeException If an unknown key is requested. |
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*/ |
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public function getSubConfig() |
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{ |
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$keys = $this->validateKeys(func_get_args()); |
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$subConfig = clone $this; |
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$subConfig->reduceToSubKey($keys); |
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return $subConfig; |
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} |
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/** |
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* Validate a set of keys to make sure they exist. |
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* |
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* @since 0.1.13 |
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* |
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* @param string ... List of keys. |
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* @return array List of keys. |
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* @throws BadMethodCallException If no argument was provided. |
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* @throws OutOfRangeException If an unknown key is requested. |
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*/ |
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public function validateKeys() |
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{ |
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$keys = $this->getKeyArguments(func_get_args()); |
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Assert\that($keys)->all()->string()->notEmpty(); |
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if (! $this->hasKey($keys)) { |
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throw new OutOfRangeException( |
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sprintf( |
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_('The configuration key %1$s does not exist.'), |
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implode('->', $keys) |
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) |
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); |
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} |
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return $keys; |
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} |
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/** |
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* Reduce the currently stored config array to a subarray at a specific level. |
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* |
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* @since 0.1.13 |
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* |
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* @param array $keys Array of keys that point to a key down in the hierarchy. |
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*/ |
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protected function reduceToSubkey(array $keys) |
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{ |
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$this->exchangeArray($this->getKey($keys)); |
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} |
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/** |
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* Recursively extract the configuration key arguments from an arbitrary array. |
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* |
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* @since 0.1.6 |
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* |
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* @param array $arguments Array as fetched through get_func_args(). |
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* @return array Array of strings. |
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* @throws BadMethodCallException If no argument was provided. |
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*/ |
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protected function getKeyArguments($arguments) |
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{ |
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Assert\that($arguments)->isArray()->notEmpty(); |
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$keys = []; |
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foreach ($arguments as $argument) { |
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if (is_array($argument)) { |
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$keys = array_merge($keys, $this->getKeyArguments($argument)); |
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} |
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if (is_string($argument)) { |
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$keys = array_merge($keys, $this->parseKeysString($argument)); |
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} |
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} |
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return $keys; |
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} |
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/** |
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* Extract individual keys from a delimited string. |
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* |
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* @since 0.1.6 |
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* |
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* @param string $keyString Delimited string of keys. |
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* @return array Array of key strings. |
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*/ |
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protected function parseKeysString($keyString) |
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{ |
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Assert\that($keyString)->string()->notEmpty(); |
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// Replace all of the configured delimiters by the first one, so that we can then use explode(). |
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$normalizedString = str_replace($this->delimiter, $this->delimiter[0], $keyString); |
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return (array)explode($this->delimiter[0], $normalizedString); |
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} |
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/** |
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* Validate the Config file. |
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* |
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* @since 0.1.0 |
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* @return boolean |
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*/ |
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abstract public function isValid(); |
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} |
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This check looks for the generic type
array
as a return type and suggests a more specific type. This type is inferred from the actual code.