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<?php
class Module
{
/*
* Static
*/
/**
* @var \Module[]
*/
private static $modules = false;
public static function get($name, $ignoreDepFail = false)
{
if (!isset(self::$modules[$name]))
return false;
if (!self::resolveDeps(self::$modules[$name]) && !$ignoreDepFail)
return false;
return self::$modules[$name];
}
private static function resolveDepsByName($name)
{
if (!isset(self::$modules[$name]))
return false;
return self::resolveDeps(self::$modules[$name]);
}
/**
*
* @param \Module $mod the module to check
* @return boolean true iff module deps are all found and enabled
*/
private static function resolveDeps($mod)
{
if (!$mod->depsChecked) {
$mod->depsChecked = true;
foreach ($mod->dependencies as $dep) {
if (!self::resolveDepsByName($dep)) {
error_log("Disabling module {$mod->name}: Dependency $dep failed.");
$mod->depsMissing = true;
return false;
}
}
}
return !$mod->depsMissing;
}
/**
* @return \Module[] List of valid, enabled modules
*/
public static function getEnabled()
{
$ret = array();
foreach (self::$modules as $module) {
if (self::resolveDeps($module))
$ret[] = $module;
}
return $ret;
}
/**
* @return \Module[] List of all modules, including with missing deps
*/
public static function getAll()
{
foreach (self::$modules as $module) {
self::resolveDeps($module);
}
return self::$modules;
}
public static function init()
{
if (self::$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 $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);
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 hasMissingDependencies()
{
return $this->depsMissing;
}
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->depsMissing)
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()
{
$string = Dictionary::translateFileModule($this->name, 'module', 'module_name');
if ($string === false) {
return '!!' . $this->name . '!!';
}
return $string;
}
public function getPageTitle()
{
return Dictionary::translateFileModule($this->name, 'module', 'page_title');
}
public function getCategory()
{
return $this->category;
}
public function getCategoryName()
{
return Dictionary::getCategoryName($this->category);
}
public function getDir()
{
return 'modules/' . $this->name;
}
}
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