Feat: CRUD категорий курсов

✅ CourseCategoryController (resource)
✅ CourseCategoryPolicy
✅ Маршруты: /admin/course-categories
✅ Blade-шаблоны:
  - index.blade.php (древовидный список)
  - create.blade.php
  - _row.blade.php (partial для дерева)
✅ Ссылка в сайдбаре
✅ Вложенность категорий (parent/children)
✅ Scope tree() для древовидной структуры

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

app/Http/Controllers/Admin/CourseCategoryController.php

@@ -0,0 +1,118 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Models\CourseCategory;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Gate;
+use Illuminate\Support\Str;
+
+class CourseCategoryController extends Controller
+{
+    public function __construct()
+    {
+        $this->middleware('auth');
+    }
+
+    public function index()
+    {
+        Gate::authorize('viewAny', CourseCategory::class);
+        
+        $categories = CourseCategory::tree();
+        
+        return view('admin.course-categories.index', compact('categories'));
+    }
+
+    public function create()
+    {
+        Gate::authorize('create', CourseCategory::class);
+        
+        $parentCategories = CourseCategory::whereNull('parent_id')
+            ->orderBy('name')
+            ->get();
+        
+        return view('admin.course-categories.create', compact('parentCategories'));
+    }
+
+    public function store(Request $request)
+    {
+        Gate::authorize('create', CourseCategory::class);
+        
+        $validated = $request->validate([
+            'name' => 'required|string|max:255',
+            'slug' => 'nullable|string|max:255|unique:course_categories',
+            'description' => 'nullable|string',
+            'parent_id' => 'nullable|exists:course_categories,id',
+            'sort_order' => 'integer',
+        ]);
+        
+        $validated['slug'] = $validated['slug'] ?? Str::slug($validated['name']);
+        $validated['is_active'] = $request->boolean('is_active');
+        
+        CourseCategory::create($validated);
+        
+        return redirect()->route('admin.course-categories.index')
+            ->with('success', 'Категория успешно создана.');
+    }
+
+    public function show(CourseCategory $category)
+    {
+        Gate::authorize('view', $category);
+        
+        $category->load(['parent', 'children', 'courses']);
+        
+        return view('admin.course-categories.show', compact('category'));
+    }
+
+    public function edit(CourseCategory $category)
+    {
+        Gate::authorize('update', $category);
+        
+        $parentCategories = CourseCategory::whereNull('parent_id')
+            ->where('id', '!=', $category->id)
+            ->orderBy('name')
+            ->get();
+        
+        return view('admin.course-categories.edit', compact('category', 'parentCategories'));
+    }
+
+    public function update(Request $request, CourseCategory $category)
+    {
+        Gate::authorize('update', $category);
+        
+        $validated = $request->validate([
+            'name' => 'required|string|max:255',
+            'slug' => 'nullable|string|max:255|unique:course_categories,slug,' . $category->id,
+            'description' => 'nullable|string',
+            'parent_id' => 'nullable|exists:course_categories,id',
+            'sort_order' => 'integer',
+        ]);
+        
+        $validated['slug'] = $validated['slug'] ?? Str::slug($validated['name']);
+        $validated['is_active'] = $request->boolean('is_active');
+        
+        $category->update($validated);
+        
+        return redirect()->route('admin.course-categories.index')
+            ->with('success', 'Категория успешно обновлена.');
+    }
+
+    public function destroy(CourseCategory $category)
+    {
+        Gate::authorize('delete', $category);
+        
+        if ($category->courses()->count() > 0) {
+            return back()->with('error', 'Невозможно удалить категорию с курсами.');
+        }
+        
+        if ($category->children()->count() > 0) {
+            return back()->with('error', 'Невозможно удалить категорию с подкатегориями.');
+        }
+        
+        $category->delete();
+        
+        return redirect()->route('admin.course-categories.index')
+            ->with('success', 'Категория успешно удалена.');
+    }
+}

app/Models/CourseCategory.php

@@ -38,4 +38,11 @@ class CourseCategory extends Model
     {
         return $this->hasMany(Course::class);
     }
+
+    public function scopeTree($query)
+    {
+        return $query->with(['children', 'children.children'])->withCount('courses')->orderBy('sort_order')->get()->filter(function($cat) {
+            return is_null($cat->parent_id);
+        });
+    }
 }

app/Policies/CourseCategoryPolicy.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\CourseCategory;
+use App\Models\User;
+
+class CourseCategoryPolicy
+{
+    public function viewAny(User $user): bool
+    {
+        return $user->hasRole(['Administrator', 'Manager', 'Curator']);
+    }
+
+    public function view(User $user, CourseCategory $category): bool
+    {
+        return $user->hasRole(['Administrator', 'Manager', 'Curator']);
+    }
+
+    public function create(User $user): bool
+    {
+        return $user->hasRole(['Administrator', 'Manager']);
+    }
+
+    public function update(User $user, CourseCategory $category): bool
+    {
+        return $user->hasRole(['Administrator', 'Manager']);
+    }
+
+    public function delete(User $user, CourseCategory $category): bool
+    {
+        return $user->hasRole(['Administrator']);
+    }
+}

app/Providers/AuthServiceProvider.php

@@ -2,9 +2,11 @@
 
 namespace App\Providers;
 
+use App\Models\CourseCategory;
 use App\Models\Group;
 use App\Models\Organization;
 use App\Models\User;
+use App\Policies\CourseCategoryPolicy;
 use App\Policies\GroupPolicy;
 use App\Policies\OrganizationPolicy;
 use App\Policies\UserPolicy;
@@ -18,6 +20,7 @@ class AuthServiceProvider extends ServiceProvider
      * @var array<class-string, class-string>
      */
     protected $policies = [
+        CourseCategory::class => CourseCategoryPolicy::class,
         Organization::class => OrganizationPolicy::class,
         Group::class => GroupPolicy::class,
         User::class => UserPolicy::class,