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<?php |
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namespace WebThumbnailer\Application; |
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use WebThumbnailer\Utils\DataUtils; |
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use WebThumbnailer\Utils\FileUtils; |
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/** |
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* Class ConfigManager |
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* |
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* Load configuration from JSON files. |
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* |
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* @package WebThumbnailer\Application |
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*/ |
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class ConfigManager |
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{ |
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/** |
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* @var string Flag telling a setting is not found. |
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*/ |
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public static $NOT_FOUND = 'NOT_FOUND'; |
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/** |
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* @var array List of JSON configuration file path. |
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*/ |
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public static $configFiles = [ |
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FileUtils::RESOURCES_PATH . 'settings.json', |
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]; |
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/** |
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* @var array Loaded config array. |
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*/ |
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protected static $loadedConfig; |
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/** |
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* Rebuild the loaded config array from config files. |
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*/ |
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public static function reload() |
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{ |
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self::initialize(); |
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} |
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/** |
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* Initialize loaded conf in ConfigManager. |
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*/ |
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protected static function initialize() |
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{ |
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self::$loadedConfig = []; |
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foreach (self::$configFiles as $configFile) { |
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self::$loadedConfig = array_replace_recursive(self::$loadedConfig, DataUtils::loadJson($configFile)); |
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} |
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} |
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/** |
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* Add a configuration file. |
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* |
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* @param string $file path. |
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*/ |
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public static function addFile($file) |
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{ |
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self::$configFiles[] = $file; |
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self::initialize(); |
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} |
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/** |
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* Clear the current config |
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*/ |
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public static function clear() |
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{ |
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self::$configFiles = [ |
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FileUtils::RESOURCES_PATH . 'settings.json', |
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]; |
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self::reload(); |
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} |
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/** |
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* Get a setting. |
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* |
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* Supports nested settings with dot separated keys. |
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* Eg. 'config.stuff.option' will find $conf[config][stuff][option], |
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* or in JSON: |
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* { "config": { "stuff": {"option": "mysetting" } } } } |
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* |
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* @param string $setting Asked setting, keys separated with dots. |
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* @param mixed $default Default value if not found. |
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* |
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* @return mixed Found setting, or the default value. |
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*/ |
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public static function get($setting, $default = '') |
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{ |
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if (empty(self::$loadedConfig)) { |
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self::initialize(); |
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} |
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$settings = explode('.', $setting); |
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$value = self::getConfig($settings, self::$loadedConfig); |
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if ($value == self::$NOT_FOUND) { |
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return $default; |
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} |
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return $value; |
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} |
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/** |
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* Recursive function which find asked setting in the loaded config. |
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* |
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* @param array $settings Ordered array which contains keys to find. |
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* @param array $config Loaded settings, then sub-array. |
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* |
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* @return mixed Found setting or NOT_FOUND flag. |
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*/ |
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protected static function getConfig($settings, $config) |
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{ |
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if (! is_array($settings) || count($settings) == 0) { |
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return self::$NOT_FOUND; |
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} |
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$setting = array_shift($settings); |
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if (!isset($config[$setting])) { |
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return self::$NOT_FOUND; |
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} |
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if (count($settings) > 0) { |
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return self::getConfig($settings, $config[$setting]); |
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} |
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return $config[$setting]; |
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} |
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} |
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ArthurHoaro /
web-thumbnailer
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