118 lines
3.0 KiB
PHP
118 lines
3.0 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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private static $items = array();
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/**
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* Get a configuration item.
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*
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* @param string $key
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* @return mixed
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*/
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public static function get($key)
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{
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// ---------------------------------------------
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// Parse the configuration key.
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// ---------------------------------------------
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list($file, $key) = static::parse($key);
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// ---------------------------------------------
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// Load the configuration file.
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// ---------------------------------------------
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static::load($file);
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// ---------------------------------------------
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// Return the requested item.
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// ---------------------------------------------
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return (array_key_exists($key, static::$items[$file])) ? static::$items[$file][$key] : null;
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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 $value
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* @return void
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*/
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public static function set($file, $value)
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{
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// ---------------------------------------------
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// Parse the configuration key.
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// ---------------------------------------------
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list($file, $key) = static::parse($key);
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// ---------------------------------------------
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// Load the configuration file.
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// ---------------------------------------------
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static::load($file);
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// ---------------------------------------------
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// Set the item's value.
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// ---------------------------------------------
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static::$items[$file][$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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* @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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// ---------------------------------------------
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// Get the key segments.
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// ---------------------------------------------
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$segments = explode('.', $key);
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// ---------------------------------------------
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// Validate the key format.
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// ---------------------------------------------
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if (count($segments) < 2)
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{
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throw new \Exception("Invalid configuration key [$key].");
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}
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// ---------------------------------------------
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// Return the file and item name.
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// ---------------------------------------------
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return array($segments[0], implode('.', array_slice($segments, 1)));
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}
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/**
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* Load all of the configuration items.
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*
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* @param string $file
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* @return void
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*/
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public static function load($file)
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{
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// ---------------------------------------------
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// If the file has already been loaded, bail.
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// ---------------------------------------------
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if (array_key_exists($file, static::$items))
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{
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return;
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}
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// ---------------------------------------------
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// Verify that the configuration file exists.
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// ---------------------------------------------
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if ( ! file_exists($path = APP_PATH.'config/'.$file.EXT))
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{
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throw new \Exception("Configuration file [$file] does not exist.");
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}
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// ---------------------------------------------
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// Load the configuration file.
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// ---------------------------------------------
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static::$items[$file] = require $path;
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}
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} |