refactor

- move elixForms API logic to specific folder
- move everything else under Api folder

src/Api/Core/Router.php

@@ -0,0 +1,57 @@
+<?php
+namespace Core;
+
+class Router {
+    private $routes = [];
+
+    public function __construct(\Core\Container $container) {
+        $this->container = $container;
+    }
+
+    public function register($method, $path, $handler) {
+        $this->routes[$method][$path] = $handler;
+    }
+
+    public function get($path, $handler) { $this->register('GET', $path, $handler); }
+    public function post($path, $handler) { $this->register('POST', $path, $handler); }
+
+    public function dispatch(Request $req, Response $res) {
+        $method = $req->method();
+        $path = $req->path();
+
+        // extract version prefix /v1/...
+        if (preg_match('#^/v([0-9]+)(/.*)?$#', $path, $m)) {
+            $version = $m[1];
+            $pathWithoutVersion = $m[2] ?? '/';
+        } else {
+            $version = '1';
+            $pathWithoutVersion = $path;
+        }
+
+        // try exact route with versioned namespace
+        $routeKey = $pathWithoutVersion;
+        if (!isset($this->routes[$method][$routeKey])) {
+            return $res->json(['error' => 'Not found'], 404);
+        }
+
+        $handler = $this->routes[$method][$routeKey];
+        // handler can be 'UsersController@index' or 'Controllers\\UsersController@index'
+        if (strpos($handler, '@') !== false) {
+            list($class, $function) = explode('@', $handler);
+            // if class not namespaced, prefix with Controllers\V{n}\
+            if (strpos($class, '\\') === false) {
+                $class = "Controllers\\V{$version}\\" . $class;
+            }
+        } else {
+            return $res->json(['error' => 'Invalid handler'], 500);
+        }
+
+        if (!class_exists($class)) {
+            return $res->json(['error' => 'Controller not found'], 500);
+        }
+
+        // snippet inside Router::dispatch
+        $controller = $this->container->make($class);
+        return $controller->$function($req, $res);
+    }
+}