feat(admin): add product controller

src/Controllers/Admin/ProductController.php

@@ -0,0 +1,139 @@
+<?php
+
+namespace Bazaar\Controllers\Admin;
+
+use Bazaar\Controllers\Controller;
+use Bazaar\Core\Response;
+
+final class ProductController extends Controller
+{
+    public function index(): Response
+    {
+        return $this->view('admin.products.index', [
+            'products' => $this->ctx->products->allForAdmin(),
+        ], 'admin.layout');
+    }
+
+    public function create(): Response
+    {
+        return $this->view('admin.products.form', [
+            'product' => null,
+            'categories' => $this->ctx->categories->all(),
+            'errors' => [],
+        ], 'admin.layout');
+    }
+
+    public function store(): Response
+    {
+        [$fields, $errors] = $this->validate();
+        if ($errors !== []) {
+            return $this->view('admin.products.form', [
+                'product' => $this->requestSnapshot(),
+                'categories' => $this->ctx->categories->all(),
+                'errors' => $errors,
+            ], 'admin.layout', 422);
+        }
+
+        $this->ctx->products->create($fields);
+        $this->ctx->session->flash('success', 'Product created.');
+        return $this->redirect('/admin/products');
+    }
+
+    public function edit(string $id): Response
+    {
+        $product = $this->ctx->products->find((int) $id);
+        if ($product === null) {
+            return $this->notFound();
+        }
+
+        return $this->view('admin.products.form', [
+            'product' => $product,
+            'categories' => $this->ctx->categories->all(),
+            'errors' => [],
+        ], 'admin.layout');
+    }
+
+    public function update(string $id): Response
+    {
+        $product = $this->ctx->products->find((int) $id);
+        if ($product === null) {
+            return $this->notFound();
+        }
+
+        [$fields, $errors] = $this->validate();
+        if ($errors !== []) {
+            return $this->view('admin.products.form', [
+                'product' => array_merge($product, $this->requestSnapshot()),
+                'categories' => $this->ctx->categories->all(),
+                'errors' => $errors,
+            ], 'admin.layout', 422);
+        }
+
+        $this->ctx->products->update((int) $id, $fields);
+        $this->ctx->session->flash('success', 'Product updated.');
+        return $this->redirect('/admin/products');
+    }
+
+    public function destroy(string $id): Response
+    {
+        $this->ctx->products->delete((int) $id);
+        $this->ctx->session->flash('success', 'Product deleted.');
+        return $this->redirect('/admin/products');
+    }
+
+    private function validate(): array
+    {
+        $request = $this->ctx->request;
+        $name = trim((string) $request->input('name', ''));
+        $categoryId = $request->integer('categoryId');
+        $priceCents = (int) round((float) $request->input('price', 0) * 100);
+        $stockQuantity = $request->integer('stockQuantity');
+        $slug = trim((string) $request->input('slug', ''));
+        if ($slug === '') {
+            $slug = slugify($name);
+        }
+
+        $errors = [];
+        if ($name === '') {
+            $errors['name'] = 'Name is required.';
+        }
+        if ($this->ctx->categories->find($categoryId) === null) {
+            $errors['categoryId'] = 'Select a valid category.';
+        }
+        if ($priceCents < 0) {
+            $errors['price'] = 'Price cannot be negative.';
+        }
+        if ($stockQuantity < 0) {
+            $errors['stockQuantity'] = 'Stock cannot be negative.';
+        }
+
+        $fields = [
+            'categoryId' => $categoryId,
+            'name' => $name,
+            'slug' => $slug,
+            'description' => trim((string) $request->input('description', '')),
+            'priceCents' => $priceCents,
+            'stockQuantity' => $stockQuantity,
+            'imageUrl' => trim((string) $request->input('imageUrl', '')),
+            'isActive' => $request->input('isActive') !== null,
+        ];
+
+        return [$fields, $errors];
+    }
+
+    private function requestSnapshot(): array
+    {
+        $request = $this->ctx->request;
+        return [
+            'id' => null,
+            'name' => (string) $request->input('name', ''),
+            'slug' => (string) $request->input('slug', ''),
+            'description' => (string) $request->input('description', ''),
+            'categoryId' => $request->integer('categoryId'),
+            'priceCents' => (int) round((float) $request->input('price', 0) * 100),
+            'stockQuantity' => $request->integer('stockQuantity'),
+            'imageUrl' => (string) $request->input('imageUrl', ''),
+            'isActive' => $request->input('isActive') !== null ? 1 : 0,
+        ];
+    }
+}