139 lines
3.8 KiB
PHP
139 lines
3.8 KiB
PHP
<?php namespace System;
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class Config {
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/**
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* All of the loaded configuration items.
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*
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* @var array
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*/
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public static $items = array();
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/**
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* Determine if a configuration item or file exists.
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*
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* @param string $key
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* @return bool
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*/
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public static function has($key)
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{
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return ! is_null(static::get($key));
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}
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/**
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* Get a configuration item.
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*
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* Configuration items are retrieved using "dot" notation. So, asking for the
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* "application.timezone" configuration item would return the "timezone" option
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* from the "application" configuration file.
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*
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* If the name of a configuration file is passed without specifying an item, the
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* entire configuration array will be returned.
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*
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* @param string $key
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* @param string $default
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* @return array
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*/
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public static function get($key, $default = null)
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{
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list($module, $file, $key) = static::parse($key);
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if ( ! static::load($module, $file))
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{
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return is_callable($default) ? call_user_func($default) : $default;
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}
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if (is_null($key))
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{
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return static::$items[$module][$file];
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}
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return Arr::get(static::$items[$module][$file], $key, $default);
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}
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/**
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* Set a configuration item.
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*
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* @param string $key
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* @param mixed $value
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* @return void
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*/
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public static function set($key, $value)
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{
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list($module, $file, $key) = static::parse($key);
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if (is_null($key) or ! static::load($module, $file))
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{
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throw new \Exception("Unable to find configuration file item [$key].");
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}
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static::$items[$module][$file][$key] = $value;
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}
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/**
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* Parse a configuration key.
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*
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* The value on the left side of the dot is the configuration file
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* name, while the right side of the dot is the item within that file.
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*
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* @param string $key
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* @return array
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*/
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private static function parse($key)
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{
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// Check for a module qualifier. If a module name is present, we need to extract it from
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// the configuration key, otherwise, we will use "application" as the module.
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$module = (strpos($key, '::') !== false) ? substr($key, 0, strpos($key, ':')) : 'application';
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// If the configuration item is stored in a module, we need to strip the module qualifier
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// off of the configuration key before continuing.
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if ($module != 'application')
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{
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$key = substr($key, strpos($key, ':') + 2);
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}
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$segments = explode('.', $key);
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// If there is more than one segment, we need to splice together and portion of the
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// configuration key that comes after the first segment, which is the file name.
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$key = (count($segments) > 1) ? implode('.', array_slice($segments, 1)) : null;
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return array($module, $segments[0], $key);
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}
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/**
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* Load all of the configuration items from a file.
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*
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* If it exists, the configuration file in the application/config directory will be loaded first.
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* Any environment specific configuration files will be merged with the root file.
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*
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* @param string $file
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* @param string $module
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* @return bool
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*/
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public static function load($module, $file)
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{
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// If the configuration items for this module and file have already been
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// loaded, we can bail out of this method.
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if (isset(static::$items[$module]) and array_key_exists($file, static::$items[$module])) return true;
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$path = ($module === 'application') ? CONFIG_PATH : MODULE_PATH.$module.'/config/';
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// Load the base configuration items for the module and file.
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$config = (file_exists($base = $path.$file.EXT)) ? require $base : array();
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// Merge any enviornment specific configuration items for the module and file.
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if (isset($_SERVER['LARAVEL_ENV']) and file_exists($path = $path.$_SERVER['LARAVEL_ENV'].'/'.$file.EXT))
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{
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$config = array_merge($config, require $path);
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}
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if (count($config) > 0)
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{
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static::$items[$module][$file] = $config;
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}
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return isset(static::$items[$module][$file]);
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}
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} |