Create alerts and make a alert for missing storage symlink show on da…

…shboard.

publishable/assets/css/voyager.css

@@ -1414,4 +1414,17 @@ ul.checkbox label {
 .show-res{
   margin-left: 5px;
   margin-top: 15px;
+}
+
+.alerts {
+  padding: 10px 10px 0px 10px;
+}
+
+.alerts .alert {
+  margin-right: 15px;
+}
+
+.alerts .alert>p,
+.alerts .alert>ul {
+  margin-top: 0;
 }

resources/views/index.blade.php

@@ -6,6 +6,15 @@
 
 @section('content')
     <div class="page-content">
+        <div class="alerts">
+            @foreach ($alerts as $alert)
+                <div class="alert alert-{{ $alert->type }} alert-name-{{ $alert->name }}">
+                    @foreach($alert->components as $component)
+                        <?php echo $component->render(); ?>
+                    @endforeach
+                </div>
+            @endforeach
+        </div>
         <div class="widgets">
             <?php if (Illuminate\Support\Facades\Schema::hasTable(with(new TCG\Voyager\Models\User())->getTable())) { ?>
             <div class="panel widget center bgimage" style="background-image:url({{ config('voyager.assets_path') }}/images/widget-backgrounds/02.png);">

src/Alert.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace TCG\Voyager;
+
+use TCG\Voyager\Alert\Components\ComponentInterface;
+
+class Alert
+{
+    protected $components;
+
+    protected $name;
+    protected $type;
+
+    public function __construct($name, $type = 'default')
+    {
+        $this->name = $name;
+        $this->type = $type;
+    }
+
+    public function addComponent(ComponentInterface $component)
+    {
+        $this->components[] = $component;
+
+        return $this;
+    }
+
+    public function __get($name)
+    {
+        return $this->$name;
+    }
+
+    public function __call($name, $arguments)
+    {
+        $component = app('voyager.alert.components.'.$name, ['alert' => $this])
+            ->setAlert($this);
+
+        call_user_func_array([$component, 'create'], $arguments);
+
+        return $this->addComponent($component);
+    }
+}

src/Alert/Components/AbstractComponent.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace TCG\Voyager\Alert\Components;
+
+use TCG\Voyager\Alert;
+
+abstract class AbstractComponent implements ComponentInterface
+{
+    protected $alert;
+
+    public function setAlert(Alert $alert)
+    {
+        $this->alert = $alert;
+
+        return $this;
+    }
+
+    public function __call($name, $arguments)
+    {
+        return call_user_func_array([$this->alert, $name], $arguments);
+    }
+}

src/Alert/Components/ButtonComponent.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace TCG\Voyager\Alert\Components;
+
+class ButtonComponent extends AbstractComponent
+{
+    protected $text;
+    protected $link;
+    protected $style;
+
+    public function create($text, $link = '#', $style = 'default')
+    {
+        $this->text = $text;
+        $this->link = $link;
+        $this->style = $style;
+    }
+
+    public function render()
+    {
+        return "<a href='{$this->link}' class='btn btn-{$this->style}'>{$this->text}</a>";
+    }
+}

src/Alert/Components/ComponentInterface.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace TCG\Voyager\Alert\Components;
+
+interface ComponentInterface
+{
+    public function render();
+}

src/Alert/Components/TextComponent.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace TCG\Voyager\Alert\Components;
+
+class TextComponent extends AbstractComponent
+{
+    protected $text;
+
+    public function create($text)
+    {
+        $this->text = $text;
+    }
+
+    public function render()
+    {
+        return "<p>{$this->text}</p>";
+    }
+}

src/Alert/Components/TitleComponent.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace TCG\Voyager\Alert\Components;
+
+class TitleComponent extends AbstractComponent
+{
+    protected $title;
+
+    public function create($title)
+    {
+        $this->title = $title;
+    }
+
+    public function render()
+    {
+        return "<strong>{$this->title}</strong>";
+    }
+}

src/Voyager.php

@@ -17,6 +17,8 @@ class Voyager
     protected $version;
     protected $filesystem;
 
+    protected $alerts = [];
+
     public function __construct()
     {
         $this->filesystem = app(Filesystem::class);
@@ -78,6 +80,16 @@ public function getVersion()
         return $this->version;
     }
 
+    public function addAlert(Alert $alert)
+    {
+        $this->alerts[] = $alert;
+    }
+
+    public function alerts()
+    {
+        return $this->alerts;
+    }
+
     protected function findVersion()
     {
         if (!is_null($this->version)) {

src/VoyagerServiceProvider.php

@@ -5,6 +5,7 @@
 use Illuminate\Foundation\AliasLoader;
 use Illuminate\Routing\Router;
 use Illuminate\Support\ServiceProvider;
+use Illuminate\Support\Facades\View;
 use Intervention\Image\ImageServiceProvider;
 use TCG\Voyager\Facades\Voyager as VoyagerFacade;
 use TCG\Voyager\Http\Middleware\VoyagerAdminMiddleware;
@@ -28,6 +29,9 @@ public function register()
             return new Voyager();
         });
 
+        $this->registerViewComposers();
+        $this->registerAlertComponents();
+
         if ($this->app->runningInConsole()) {
             $this->registerPublishableResources();
             $this->registerConsoleCommands();
@@ -57,6 +61,48 @@ public function boot(Router $router)
         $this->loadViewsFrom(__DIR__.'/../resources/views', 'voyager');
 
         $router->middleware('admin.user', VoyagerAdminMiddleware::class);
+
+        $this->addStorageSymlinkAlert();
+    }
+
+    /**
+     * Register view composers.
+     */
+    protected function registerViewComposers()
+    {
+        // Register alerts
+        View::composer('voyager::index', function ($view) {
+            $view->with('alerts', VoyagerFacade::alerts());
+        });
+    }
+
+    /**
+     * Add storage symlink alert.
+     */
+    protected function addStorageSymlinkAlert()
+    {
+        if (!is_link(public_path('storage-off'))) {
+            $alert = (new Alert('missing-storage-symlink', 'warning'))
+                ->title('Missing storage symlink')
+                ->text('We could not find a storage symlink. This could cause problems with loading media files from the browser.')
+                ->button('Fix it', '?fix-missing-storage-symlink');
+
+            VoyagerFacade::addAlert($alert);
+        }
+    }
+
+    /**
+     * Register alert components.
+     */
+    protected function registerAlertComponents()
+    {
+        $components = ['title', 'text', 'button'];
+
+        foreach ($components as $component) {
+            $class = 'TCG\\Voyager\\Alert\\Components\\'.ucfirst(camel_case($component)).'Component';
+
+            $this->app->bind("voyager.alert.components.{$component}", $class);
+        }
     }
 
     /**