FEATURE: hide menu entry when no content modules are available

app/CMS/Handlers/BaseHandler.php

@@ -5,6 +5,7 @@ namespace App\CMS\Handlers;
 use App\CMS\Contracts\Modules\BaseModuleHandler;
 use App\CMS\Enumerations\TemplatePathsHumanReadableRootOnly;
 use App\CMS\Enumerations\WidgetTypes;
+use App\CMS\Repositories\Module;
 use App\Models\ActionLog\ActionLog;
 use App\Models\Content\Content;
 use App\Models\FileManager\File;
@@ -39,7 +40,9 @@ abstract class BaseHandler implements BaseModuleHandler
              * Content pages
              * Submenus can be registered later
              */
-            if ($user->can('manage', Content::class)) {
+            $contentModules = app(Module::class)->getContentModules();
+
+            if ($user->can('manage', Content::class) && !$contentModules->isEmpty()) {
                 $menu->dropdown(trans('admin/mainMenu.contentPages'), function ($sub) {
                     $sub->route('content.overview', trans('admin/mainMenu.contentPageOverview'), [], 10000, ['icon' => 'fa fa-fw fa-list']);
                 }, 20, ['icon' => 'fa fa-fw fa-database']);

app/CMS/ModuleManager/Installer.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\CMS\ModuleManager;
+
+use App\CMS\Contracts\Modules\AppHandler;
+use App\CMS\Contracts\Modules\TemplateHandler;
+use App\Models\Module;
+use Illuminate\Support\Facades\App;
+
+class Installer
+{
+    /**
+     * Create new module in database
+     *
+     * @param        $name
+     * @param        $alias
+     * @param string $description
+     * @param null   $handler
+     * @param        $parentModuleId
+     * @param array  $settings
+     *
+     * @return Module
+     * @throws \ErrorException
+     */
+    public static function install($name, $alias, $staticName, $description, $handler, $parentModuleId, $settings)
+    {
+        // check if user does not want to install module in runtime
+        if (!App::runningInConsole()) {
+            throw new \ErrorException('Modules can be installed only via Artisan!');
+        }
+
+        $managesContent = $handler ? in_array(AppHandler::class, class_implements($handler)) : false;
+        $isTemplate = $handler ? in_array(TemplateHandler::class, class_implements($handler)) : false;
+        $supportCategories = $managesContent ? call_user_func([$handler, 'supportCategories']) : false;
+
+        if ($parentModuleId) {
+            $parentModule = Module::findOrFail($parentModuleId);
+            $parentModule->has_submodules = true;
+            $parentModule->save();
+        }
+
+        // insert module into database
+        $module = Module::create([
+                                     'name'               => $name,
+                                     'description'        => $description,
+                                     'handler'            => $handler,
+                                     'static_name'        => $staticName,
+                                     'manages_content'    => $managesContent,
+                                     'support_categories' => $supportCategories,
+                                     'alias'              => $alias,
+                                     'module_settings'    => $settings,
+                                     'parent_id'          => $parentModuleId ? $parentModuleId : null,
+                                     'enabled'            => 1,
+                                     'is_template'        => $isTemplate
+                                 ]);
+
+        // install something module-specific
+        if ($handler && is_callable([$handler, 'install'])) {
+            call_user_func([$handler, 'install']);
+        }
+
+        return $module;
+    }
+}

app/CMS/ModuleManager/Providers/ModuleManager.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\CMS\ModuleManager\Providers;
+
+use App\CMS\Repositories\Module as ModuleRepository;
+use Illuminate\Support\ServiceProvider;
+
+class ModuleManager extends ServiceProvider
+{
+    /**
+     * Bootstrap the application services.
+     * @return void
+     */
+    public function boot()
+    {
+        // this service provider needs published config - config is merged right after this service provider
+        $modules = app(ModuleRepository::class)->getOnlyModules();
+
+//        dd($modules);
+
+        // iterate over all modules and enable or disable them
+        foreach ($modules as $module) {
+            if (isset($module->module_settings['providers']) && !empty($module->module_settings['providers'])) {
+                foreach ($module->module_settings['providers'] as $provider) {
+                    $this->app->register($provider);
+                }
+            }
+
+            // include files (if any)
+            if (isset($module->module_settings['files']) && !empty($module->module_settings['files'])) {
+                foreach ($module->module_settings['files'] as $file) {
+                    include config('modules.paths.modules') . '/' . $module->static_name . '/' . $file;
+                }
+            }
+        }
+    }
+
+    /**
+     * Register the application services.
+     * @return void
+     */
+    public function register()
+    {
+    }
+}

app/CMS/ModuleManager/Uninstaller.php

@@ -0,0 +1,60 @@
+<?php
+namespace  App\CMS\ModuleManager;
+
+use App\Models\Module;
+use App\Models\Templates\TemplatePath;
+use Illuminate\Support\Facades\App;
+
+class Uninstaller {
+    /**
+     * Delete module from database and uninstall its dependencies
+     *
+     * @param Module $module
+     *
+     * @throws \ErrorException
+     */
+    public static function uninstall(Module $module)
+    {
+        // check if user does not want to install module in runtime
+        if (!App::runningInConsole()) {
+            throw new \ErrorException('Modules can be uninstalled only via Artisan!');
+        }
+
+        // delete everything in /resources/views/visitor
+        if ($module->is_template) {
+            self::deleteDirectory(resource_path('views/visitor'));
+            self::deleteDirectory(resource_path('views/modules'));
+            self::deleteDirectory(public_path('assets'));
+
+            // delete all template paths
+            TemplatePath::getQuery()
+                        ->delete();
+        }
+
+        if ($module->handler && is_callable([$module->handler, 'uninstall'])) {
+            call_user_func([$module->handler, 'uninstall'], $module);
+        }
+
+        $module->delete();
+    }
+
+    /**
+     * Delete directory when uninstalling module.
+     *
+     * @param $directory
+     *
+     * @throws \ErrorException
+     */
+    private static function deleteDirectory($directory)
+    {
+        if (!is_dir($directory)) {
+            return;
+        }
+
+        $success = \File::deleteDirectory($directory, true);
+
+        if (!$success) {
+            throw new \ErrorException('Cannot delete ' . $directory);
+        }
+    }
+}

app/CMS/Repositories/Module.php

@@ -28,6 +28,15 @@ class Module extends Repository implements IModule
         }
     }
 
+    public function getContentModules()
+    {
+        return Cache::remember('enabled-content-modules', 3600, function () {
+            return ModuleModel::where('enabled', true)
+                       ->where('manages_content', true)
+                       ->get();
+        });
+    }
+
     public function getCreateContentTitle(ModuleModel $module)
     {
         $pageHeading = trans('admin/contents.new', ['name' => trans($module->name)]);
@@ -64,8 +73,8 @@ class Module extends Repository implements IModule
     {
         return Cache::rememberForever('enabled-modules', function () {
             return ModuleModel::where('enabled', true)
-                         ->where('is_template', false)
-                         ->get();
+                              ->where('is_template', false)
+                              ->get();
         });
     }