Initial commit, framework/frontend assets setup

app/Controllers/Api/SubnetController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Controllers\Api;
+
+use App\Services\Subnet;
+use Core\Controllers\Controller;
+use Core\View\Render;
+use Exception;
+
+class SubnetController extends Controller
+{
+    /**
+     * Get all subnet data
+     *
+     * @return \Core\View\Render
+     */
+    public function data(): Render
+    {
+        // Get the user input
+        $subnet = $this->request->get('subnet', '');
+
+        try {
+            // Validate the input
+            if (!str_contains($subnet, '/')) {
+                throw new Exception('Invalid subnet format.');
+            }
+
+            // Delegate calculation to subnet service
+            $subnetInfo = Subnet::calculate($subnet);
+
+            return $this->response->json()
+                                  ->with('result', $subnetInfo);
+        } catch (Exception $e) {
+            return $this->response->status(403)
+                                  ->json()
+                                  ->with('message', $e->getMessage());
+        }
+    }
+}

app/Controllers/HomeController.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Controllers;
+
+use Core\Controllers\Controller;
+use Core\View\Render;
+
+class HomeController extends Controller
+{
+    /**
+     * Render index
+     *
+     * @return \Core\View\Render
+     */
+    public function index(): Render
+    {
+        return $this->response->view('subnet');
+    }
+}