feat(admin): add coupon, order and review controllers

src/Controllers/Admin/CouponController.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace Bazaar\Controllers\Admin;
+
+use Bazaar\Controllers\Controller;
+use Bazaar\Core\Response;
+
+final class CouponController extends Controller
+{
+    public function index(): Response
+    {
+        return $this->view('admin.coupons.index', [
+            'coupons' => $this->ctx->coupons->all(),
+        ], 'admin.layout');
+    }
+
+    public function create(): Response
+    {
+        return $this->view('admin.coupons.form', ['errors' => []], 'admin.layout');
+    }
+
+    public function store(): Response
+    {
+        [$fields, $errors] = $this->validate();
+        if ($errors !== []) {
+            return $this->view('admin.coupons.form', ['errors' => $errors], 'admin.layout', 422);
+        }
+
+        $this->ctx->coupons->create($fields);
+        $this->ctx->session->flash('success', 'Coupon created.');
+        return $this->redirect('/admin/coupons');
+    }
+
+    public function destroy(string $id): Response
+    {
+        $this->ctx->coupons->delete((int) $id);
+        $this->ctx->session->flash('success', 'Coupon deleted.');
+        return $this->redirect('/admin/coupons');
+    }
+
+    private function validate(): array
+    {
+        $request = $this->ctx->request;
+        $code = strtoupper(trim((string) $request->input('code', '')));
+        $type = $request->input('type') === 'fixed' ? 'fixed' : 'percent';
+        $rawValue = (float) $request->input('value', 0);
+        $value = $type === 'percent' ? (int) round($rawValue) : (int) round($rawValue * 100);
+        $maxRedemptions = $request->input('maxRedemptions', '');
+
+        $errors = [];
+        if ($code === '') {
+            $errors['code'] = 'Code is required.';
+        } elseif ($this->ctx->coupons->findByCode($code) !== null) {
+            $errors['code'] = 'A coupon with this code already exists.';
+        }
+        if ($type === 'percent' && ($value < 1 || $value > 100)) {
+            $errors['value'] = 'Percent must be between 1 and 100.';
+        }
+        if ($type === 'fixed' && $value < 1) {
+            $errors['value'] = 'Amount must be greater than zero.';
+        }
+
+        $fields = [
+            'code' => $code,
+            'type' => $type,
+            'value' => $value,
+            'minSubtotalCents' => (int) round((float) $request->input('minSubtotal', 0) * 100),
+            'maxRedemptions' => is_numeric($maxRedemptions) ? (int) $maxRedemptions : null,
+            'startsAt' => $this->normalizeDate((string) $request->input('startsAt', '')),
+            'expiresAt' => $this->normalizeDate((string) $request->input('expiresAt', '')),
+            'isActive' => $request->input('isActive') !== null,
+        ];
+
+        return [$fields, $errors];
+    }
+
+    private function normalizeDate(string $value): ?string
+    {
+        $value = trim($value);
+        if ($value === '') {
+            return null;
+        }
+        $timestamp = strtotime($value);
+        return $timestamp === false ? null : gmdate('c', $timestamp);
+    }
+}