Initial commit

backend/app/Controllers/BaseController.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Core\Request;
+use App\Core\Response;
+
+/**
+ * Foundation controller offering model loading, request parsing, and validation helpers.
+ */
+class BaseController
+{
+    /**
+     * Validate request payload and return array of errors if any fail
+     *
+     * @param Request $request
+     * @param array $rules List of keys and their validation constraints (e.g. ['email' => 'required|email'])
+     * @return array Empty if valid, otherwise contains error messages
+     */
+    protected function validate(Request $request, array $rules): array
+    {
+        $errors = [];
+        $data = $request->getBody();
+
+        foreach ($rules as $field => $constraints) {
+            $value = $data[$field] ?? null;
+            $constraintsArray = explode('|', $constraints);
+
+            foreach ($constraintsArray as $constraint) {
+                if ($constraint === 'required') {
+                    if ($value === null || $value === '') {
+                        $errors[$field][] = "The {$field} field is required.";
+                    }
+                } elseif ($constraint === 'email') {
+                    if ($value !== null && $value !== '' && !filter_var($value, FILTER_VALIDATE_EMAIL)) {
+                        $errors[$field][] = "The {$field} must be a valid email address.";
+                    }
+                } elseif (strpos($constraint, 'min:') === 0) {
+                    $min = (int) substr($constraint, 4);
+                    if ($value !== null && strlen((string)$value) < $min) {
+                        $errors[$field][] = "The {$field} must be at least {$min} characters.";
+                    }
+                }
+            }
+        }
+
+        return $errors;
+    }
+}