refactor: extract index.php to RssBridge.php (#2961)

* refactor: extract entry point into class

* refactor: js

* refactor: extract frontpage action

index.php

@@ -2,55 +2,6 @@
 
 require_once __DIR__ . '/lib/rssbridge.php';
 
-try {
-    Configuration::verifyInstallation();
-    Configuration::loadConfiguration();
+$rssBridge = new RssBridge();
 
-    date_default_timezone_set(Configuration::getConfig('system', 'timezone'));
-
-    define('CUSTOM_CACHE_TIMEOUT', Configuration::getConfig('cache', 'custom_timeout'));
-
-    $authenticationMiddleware = new AuthenticationMiddleware();
-    if (Configuration::getConfig('authentication', 'enable')) {
-        $authenticationMiddleware();
-    }
-
-    if (isset($argv)) {
-        parse_str(implode('&', array_slice($argv, 1)), $cliArgs);
-        $request = $cliArgs;
-    } else {
-        $request = $_GET;
-    }
-    foreach ($request as $key => $value) {
-        if (! is_string($value)) {
-            throw new \Exception("Query parameter \"$key\" is not a string.");
-        }
-    }
-
-    $actionFactory = new ActionFactory();
-
-    if (array_key_exists('action', $request)) {
-        $action = $actionFactory->create($request['action']);
-
-        $action->execute($request);
-    } else {
-        $showInactive = filter_input(INPUT_GET, 'show_inactive', FILTER_VALIDATE_BOOLEAN);
-        echo BridgeList::create($showInactive);
-    }
-} catch (\Throwable $e) {
-    error_log($e);
-
-    $message = sprintf(
-        'Uncaught Exception %s: %s at %s line %s',
-        get_class($e),
-        $e->getMessage(),
-        trim_path_prefix($e->getFile()),
-        $e->getLine()
-    );
-
-    http_response_code(500);
-    print render('error.html.php', [
-        'message' => $message,
-        'stacktrace' => create_sane_stacktrace($e),
-    ]);
-}
+$rssBridge->main($argv ?? []);