<?php

require_once "config.php";

require_once "common.php";

require_once "Classes/class-message.php";


/** Check for plugins and load them.
 * 
 * This expects your plugin folder to be located in `plugins/` and that the directory name,
 * constructor file name and class name are identical.
 * For example:
 * You must have a file structure like this: plugins/myplugin/myplugin.php
 * Which contains a class like this:
 * ```
 * class myplugin {
 *      $name = "My plugin";
 *      $author = "Joe Bloggs";
 *      $version "1.0";
 *      $desc = "This is my plugin and it does stuff";
 *      
 *      // rest of code here...
 * }
 * ```
 * Your plugin class must be constructable and contain the following public variables:
 * $name    The name or title of your plugin.
 * $author  The name of the author
 * $version The version of the plugin
 * $description    A short description of the plugin
*/
class Plugins
{
    static $list = [];

    static function load($modname)
    {
        $plugin = new Plugin($modname);
        if ($plugin->error)
        {
            Message::Fail("Warning: Plugin \"$modname\" failed to load: $plugin->error");
        }
        else
        {
            self::$list[] = $plugin;
        }
    }
}

class Plugin
{
    public $name;
    public $author;
    public $version;
    public $description;
    public $handle;

    public $error = NULL;
    function __construct($handle)
    {
        if (!is_dir("plugins/$handle"))
            $this->error = "Plugin directory \"plugins/$handle\" doesn't exist";

        else if (!is_file("plugins/$handle/$handle.php"))
            $this->error = "Plugin file \"plugins/$handle/$handle.php\" doesn't exist";

        else
        {
            require_once "plugins/$handle/$handle.php";

            if (!class_exists($handle))
                $this->error = "Class \"$handle\" doesn't exist";

            else
            {
                $plugin = new $handle();
            
                if (!isset($plugin->name))
                    $this->error = "Plugin name not defined";
                elseif (!isset($plugin->author))
                    $this->error = "Plugin author not defined";
                elseif (!isset($plugin->version))
                    $this->error = "Plugin version not defined";
                elseif (!isset($plugin->description))
                    $this->error = "Plugin description not defined";
                else
                {
                    $this->handle = $handle;
                    $this->name = $plugin->name;
                    $this->author = $plugin->author;
                    $this->version = $plugin->version;
                    $this->description = $plugin->description;
                }
            }
        }
    }
}

if (defined('PLUGINS'))
{
    foreach(PLUGINS as $plugin)
        Plugins::load($plugin);
}