From 95db8e184b378534db0ac08d14ae8500ee5090c3 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 28 Apr 2016 21:31:15 +0200
Subject: Implemented new menu, added logic for defining dependencies, move
 translation files around

---
 inc/module.inc.php | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 inc/module.inc.php

(limited to 'inc/module.inc.php')

diff --git a/inc/module.inc.php b/inc/module.inc.php
new file mode 100644
index 00000000..9126cb32
--- /dev/null
+++ b/inc/module.inc.php
@@ -0,0 +1,173 @@
+<?php
+
+class Module
+{
+	/*
+	 * Static
+	 */
+
+	/**
+	 * @var \Module[]
+	 */
+	private static $modules = false;
+	
+	public static function get($name)
+	{
+		if (!isset(self::$modules[$name]))
+			return false;
+		if (!self::resolveDeps(self::$modules[$name]))
+			return false;
+		return self::$modules[$name];
+	}
+	
+	private static function resolveDepsByName($name)
+	{
+		if (!isset(self::$modules[$name]))
+			return false;
+		return self::resolveDeps(self::$modules[$name]);
+	}
+
+	private static function resolveDeps($mod)
+	{
+		if (!$mod->depsChecked) {
+			$mod->depsChecked = true;
+			foreach ($mod->dependencies as $dep) {
+				if (!self::resolveDepsByName($dep)) {
+					if ($mod->enabled) {
+						error_log("Disabling module $name: Dependency $dep failed.");
+					}
+					$mod->enabled = false;
+					$mod->depsMissing = true;
+					return false;
+				}
+			}
+		}
+		return $mod->enabled;
+	}
+
+	/**
+	 * @return \Module[] List of enabled modules
+	 */
+	public static function getEnabled()
+	{
+		$ret = array();
+		foreach (self::$modules as $module) {
+			if (self::resolveDeps($module))
+				$ret[] = $module;
+		}
+		return $ret;
+	}
+
+	public static function init()
+	{
+		if (self::$modules !== false)
+			return;
+		$dh = opendir('modules');
+		if ($dh === false)
+			return;
+		self::$modules = array();
+		while (($dir = readdir($dh)) !== false) {
+			if (empty($dir) || preg_match('/[^a-zA-Z0-9]/', $dir))
+				continue;
+			if (!is_file('modules/' . $dir . '/config.json'))
+				continue;
+			$name = strtolower($dir);
+			self::$modules[$name] = new Module($dir);
+		}
+		closedir($dh);
+	}
+
+	/*
+	 * Non-static
+	 */
+
+	private $enabled = false;
+	private $category = false;
+	private $depsMissing = false;
+	private $depsChecked = false;
+	private $activated = false;
+	private $dependencies = array();
+	private $name;
+
+	private function __construct($name)
+	{
+		$file = 'modules/' . $name . '/config.json';
+		$json = @json_decode(@file_get_contents($file), true);
+		$this->enabled = isset($json['enabled']) && ($json['enabled'] === true || $json['enabled'] === 'true');
+		if (isset($json['dependencies']) && is_array($json['dependencies'])) {
+			$this->dependencies = $json['dependencies'];
+		}
+		if (isset($json['category']) && is_string($json['category'])) {
+			$this->category = $json['category'];
+		}
+		$this->name = $name;
+	}
+	
+	public function newPage()
+	{
+		$modulePath = 'modules/' . $this->name . '/page.inc.php';
+		if (!file_exists($modulePath)) {
+			Util::traceError("Module doesn't have a page: " . $modulePath);
+		}
+		require_once $modulePath;
+		$class = 'Page_' . $this->name;
+		return new $class();
+	}
+
+	public function activate()
+	{
+		if ($this->activated || !$this->enabled)
+			return;
+		$this->activated = true;
+		spl_autoload_register(function($class) {
+			$file = 'modules/' . $this->name . '/inc/' . preg_replace('/[^a-z0-9]/', '', strtolower($class)) . '.inc.php';
+			if (!file_exists($file))
+				return;
+			require_once $file;
+		});
+		foreach ($this->dependencies as $dep) {
+			$get = self::get($dep);
+			if ($get !== false) {
+				$get->activate();
+			}
+		}
+	}
+	
+	public function getIdentifier()
+	{
+		return $this->name;
+	}
+
+	public function getDisplayName()
+	{
+		$string = Dictionary::translate($this->name, 'module', 'module_name');
+		if ($string === false) {
+			return $this->name;
+		}
+		return $string;
+	}
+	
+	public function getCategory()
+	{
+		return $this->category;
+	}
+	
+	public function getCategoryName()
+	{
+		return Dictionary::getCategoryName($this->category);
+	}
+	
+	public function translate($tag, $section = 'module')
+	{
+		$string = Dictionary::translate($this->name, $section, $tag);
+		if ($string === false) {
+			$string = Dictionary::translate('core', $section, $tag);
+		}
+		if ($string === false) {
+			error_log('Translation not found. Module: ' . $this->name . ', section: ' . $section . ', tag: ' . $tag);
+			$string = '!!' . $tag . '!!';
+		}
+		return $string;
+	}
+
+}
-- 
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