gnu-social/src/Core/ModuleManager.php

176 lines
6.3 KiB
PHP

<?php
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
/**
* Module and plugin loader code, one of the main features of GNU social
*
* Loads plugins from `plugins/enabled`, instances them
* and hooks its events
*
* @package GNUsocial
* @category Modules
*
* @author Hugo Sales <hugo@hsal.es>
* @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
namespace App\Core;
use App\Util\Formatting;
use AppendIterator;
use FilesystemIterator;
use Functional as F;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Reference;
class ModuleManager
{
public function __construct()
{
if (!defined('CACHE_FILE')) {
define('CACHE_FILE', INSTALLDIR . '/var/cache/module_manager.php');
}
}
protected static $loader;
/** @codeCoverageIgnore */
public static function setLoader($l)
{
self::$loader = $l;
}
protected array $modules = [];
protected array $events = [];
/**
* Add the $fqcn class from $path as a module
*/
public function add(string $fqcn, string $path)
{
[$type, $module] = preg_split('/\\\\/', $fqcn, 0, PREG_SPLIT_NO_EMPTY);
self::$loader->addPsr4("\\{$type}\\{$module}\\", dirname($path));
$id = Formatting::camelCaseToSnakeCase($type . '.' . $module);
$obj = new $fqcn();
$this->modules[$id] = $obj;
}
/**
* Container-build-time step that preprocesses the registering of events
*/
public function preRegisterEvents()
{
foreach ($this->modules as $id => $obj) {
F\map(F\select(get_class_methods($obj),
F\ary(F\partial_right('App\Util\Formatting::startsWith', 'on'), 1)),
function (string $m) use ($obj) {
$ev = substr($m, 2);
$this->events[$ev] = $this->events[$ev] ?? [];
$this->events[$ev][] = [$obj, $m];
}
);
}
}
/**
* Compiler pass responsible for registering all modules
*/
public static function process(?ContainerBuilder $container = null)
{
$module_paths = array_merge(glob(INSTALLDIR . '/components/*/*.php'), glob(INSTALLDIR . '/plugins/*/*.php'));
$module_manager = new self();
$entity_paths = [];
foreach ($module_paths as $path) {
$type = ucfirst(preg_replace('%' . INSTALLDIR . '/(component|plugin)s/.*%', '\1', $path));
$dir = dirname($path);
$module = basename($dir); // component or plugin
$fqcn = "\\{$type}\\{$module}\\{$module}";
$module_manager->add($fqcn, $path);
if (!is_null($container) && file_exists($dir = $dir . '/Entity') && is_dir($dir)) {
// Happens at compile time, so it's hard to do integration testing. However,
// everything would break if this did :')
// @codeCoverageIgnoreStart
$entity_paths[] = $dir;
$container->findDefinition('doctrine.orm.default_metadata_driver')->addMethodCall(
'addDriver',
[new Reference('app.schemadef_driver'), "{$type}\\{$module}\\Entity"]
);
// @codeCoverageIgnoreEnd
}
}
if (!is_null($container)) {
// @codeCoverageIgnoreStart
$container->findDefinition('app.schemadef_driver')
->addMethodCall('addPaths', ['$paths' => $entity_paths]);
// @codeCoverageIgnoreEnd
}
$module_manager->preRegisterEvents();
file_put_contents(CACHE_FILE, "<?php\nreturn " . var_export($module_manager, true) . ';');
}
/**
* Serialize this class, for dumping into the cache
*
* @param mixed $state
*/
public static function __set_state($state)
{
$obj = new self();
$obj->modules = $state['modules'];
$obj->events = $state['events'];
return $obj;
}
/**
* Load the modules at runtime. In production requires the cache
* file to exist, in dev it rebuilds this cache
*/
public function loadModules()
{
if ($_ENV['APP_ENV'] === 'prod' && !file_exists(CACHE_FILE)) {
// @codeCoverageIgnoreStart
throw new Exception('The application needs to be compiled before using in production');
// @codeCoverageIgnoreEnd
} else {
$rdi = new AppendIterator();
$rdi->append(new RecursiveIteratorIterator(new RecursiveDirectoryIterator(INSTALLDIR . '/components', FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS)));
$rdi->append(new RecursiveIteratorIterator(new RecursiveDirectoryIterator(INSTALLDIR . '/plugins', FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS)));
$time = file_exists(CACHE_FILE) ? filemtime(CACHE_FILE) : 0;
if ($_ENV['APP_ENV'] === 'test' || F\some($rdi, function ($e) use ($time) { return $e->getMTime() > $time; })) {
Log::info('Rebuilding plugin cache at runtime. This means we can\'t update DB definitions');
self::process();
}
}
$obj = require CACHE_FILE;
foreach ($obj->events as $event => $callables) {
foreach ($callables as $callable) {
Event::addHandler($event, $callable);
}
}
}
}