Added proof of concept for controllers system

public_html/.htaccess

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+RewriteEngine On
+RewriteRule ^/?api/(.*) api-dispatch.php?q=$1 [L]

public_html/api-dispatch.php

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+<?php
+require_once('..' . DIRECTORY_SEPARATOR . 'src' . DIRECTORY_SEPARATOR . 'AutoLoader.php');
+
+function injectControllers($router)
+{
+	\Szurubooru\Controllers\AuthController::register($router);
+}
+
+$router = new \Szurubooru\Router;
+injectControllers($router);
+
+try
+{
+	$json = $router->handle($_SERVER['REQUEST_METHOD'], $_SERVER['REQUEST_URI']);
+}
+catch (\Exception $e)
+{
+	$json = [
+		'error' => $e->getMessage(),
+		'trace' => $e->getTrace(),
+	];
+}
+
+header('Content-Type: application/json');
+echo json_encode($json);

src/Controllers/AbstractController.php

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+<?php
+namespace Szurubooru\Controllers;
+
+abstract class AbstractController
+{
+	public static function register(\Szurubooru\Router $router)
+	{
+		return new static($router);
+	}
+}

src/Controllers/AuthController.php

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+<?php
+namespace Szurubooru\Controllers;
+
+final class AuthController extends AbstractController
+{
+	public function __construct(\Szurubooru\Router $router)
+	{
+		$router->post('/api/login', [$this, 'login']);
+		$router->get('/api/login', [$this, 'login']);
+	}
+
+	public function login()
+	{
+	}
+}