FEATURE: add support for categories into content save/edit

app/Http/Controllers/Admin/EditContent.php

@@ -14,10 +14,12 @@ use App\Http\Requests\Request;
 use App\Models\Content;
 use App\Models\ContentHistory;
 use App\Models\File;
+use App\Models\Module;
 use App\Models\Template;
 use Illuminate\Support\Facades\Event;
 use Illuminate\Support\Str;
 use Mcamara\LaravelLocalization\Facades\LaravelLocalization;
+use Modules\Categories\Entities\Category;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 class EditContent extends Controller
@@ -55,16 +57,27 @@ class EditContent extends Controller
 
         $allModules = ModulesHandlerToId::getWithTranslations();
         $moduleId = $allModules[$page->module_handler];
+        $module = Module::findOrFail($moduleId);
+
         $templates = Template::where('module_id', $moduleId)
                              ->select(['template_name', 'name', 'description'])
                              ->get();
 
+        // add categories, if supported
+        $categories = [];
+        if ($module->support_categories) {
+            $categories = Category::where('module_id', $moduleId)
+                                  ->get();
+        }
+
         $history = $this->history->getStructuredHistoryOf($page);
 
         // render view
         return view('admin.content.edit', [
             'contentStatuses'  => $statuses,
             'page'             => $page,
+            'module'           => $module,
+            'categories'       => $categories,
             'rootPages'        => $page->getOverview()
                                        ->where('contents.id', '!=', $page->id)
                                        ->get(),
@@ -121,7 +134,8 @@ class EditContent extends Controller
             'content'          => 'pageContent',
             'parent_id'        => 'parentPage',
             'status'           => 'status',
-            'title_photo'      => 'titlePhotoFilename'
+            'title_photo'      => 'titlePhotoFilename',
+            'category_id'      => 'category'
         ];
 
         // save new values with history