WordPress library management

tribe-common-libraries.class.php

<?php
/**
 * Class for managing overlapping helper plugins. This ensures that we use the latest versions of common code.
 * 
 * Usage: include this file on any plugin that may have shared code BEFORE the 'plugins_loaded' action is completed. 
 * After including this file, register the helper files using the TribeCommonLibraries::register() instead of including the files directly.
 * 
 * @author Peter Chester
 * @version 1.0
 */

// Don't load directly
if ( !defined('ABSPATH') ) { die('-1'); }

if( !class_exists( 'TribeCommonLibraries' ) ) {
	class TribeCommonLibraries {
	
		private static $tribe_registered_plugins;

		/**
		 * Enforce Singleton Pattern
		 */
		private static $instance;
		public function getInstance() {
			if(null == self::$instance) {
				$className = __CLASS__;
				self::$instance = new $className;
			}
			return self::$instance;
		}

		
		private function __construct() {
			self::$tribe_registered_plugins = array();
			add_action( 'plugins_loaded', array( __CLASS__, 'activate_plugins' ) );
		}	
		
		/**
		 * Register a plugin / helper class
		 *
		 * @param string $slug - slug specific to the helper class / plugin
		 * @param string $version - version of the helper class / plugin
		 * @param string $path - absolute path of the helper class / plugin file
		 */
		public static function register($slug,$version,$path) {
			if ( !isset( self::$tribe_registered_plugins[$slug] ) || version_compare( self::$tribe_registered_plugins[$slug]['version'], $version, '>' ) ) {
				self::$tribe_registered_plugins[$slug] = array(
					'version'=>$version,
					'path'=>$path,
				);
			}
		}

		/**
		 * Activate all plugins.
		 */
		public function activate_plugins() {
			foreach(self::$tribe_registered_plugins as $k => $v) {
				require_once($v['path']);
				do_action('tribe_helper_activate_'.$k);
			}
			do_action('tribe_helper_activation_complete');
		}
	}
	
	TribeCommonLibraries::getInstance();
}
?>