add support for callback of enabling/disabling/deleting plugins

app/Events/PluginWasDisabled.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Events;
+
+use App\Services\Plugin;
+
+class PluginWasDisabled extends Event
+{
+    public $plugin;
+
+    /**
+     * Create a new event instance.
+     *
+     * @return void
+     */
+    public function __construct(Plugin $plugin)
+    {
+        $this->plugin = $plugin;
+    }
+
+}

app/Events/PluginWasEnabled.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Events;
+
+use App\Services\Plugin;
+
+class PluginWasEnabled extends Event
+{
+    public $plugin;
+
+    /**
+     * Create a new event instance.
+     *
+     * @return void
+     */
+    public function __construct(Plugin $plugin)
+    {
+        $this->plugin = $plugin;
+    }
+
+}

app/Providers/PluginServiceProvider.php

@@ -2,12 +2,25 @@
 
 namespace App\Providers;
 
+use Event;
+use App\Events;
 use Illuminate\Support\Str;
 use App\Services\PluginManager;
 use Illuminate\Support\ServiceProvider;
 
 class PluginServiceProvider extends ServiceProvider
 {
+    /**
+     * Map of event class names to callback names.
+     *
+     * @var array
+     */
+    protected $eventCallbackMap = [
+        Events\PluginWasEnabled::class  => 'enabled',
+        Events\PluginWasDeleted::class  => 'deleted',
+        Events\PluginWasDisabled::class => 'disabled'
+    ];
+
     /**
      * Bootstrap any application services.
      *
@@ -33,6 +46,7 @@ class PluginServiceProvider extends ServiceProvider
             $loader->addNamespace($plugin->getNameSpace(), $plugin->getPath()."/lang");
         }
 
+        $this->registerPluginCallbackListener();
         $this->registerClassAutoloader($src_paths);
 
         $bootstrappers = $plugins->getEnabledBootstrappers();
@@ -44,6 +58,20 @@ class PluginServiceProvider extends ServiceProvider
         }
     }
 
+    protected function registerPluginCallbackListener()
+    {
+        Event::listen(array_keys($this->eventCallbackMap), function ($event) {
+            // call callback functions of plugin
+            if (file_exists($filename = $event->plugin->getPath()."/callbacks.php")) {
+                $callbacks = require $filename;
+
+                $callback = array_get($callbacks, $this->eventCallbackMap[get_class($event)]);
+
+                return $callback ? call_user_func($callback, $event->plugin) : null;
+            }
+        });
+    }
+
     /**
      * Register any application services.
      *

app/Services/PluginManager.php

@@ -2,9 +2,8 @@
 
 namespace App\Services;
 
+use App\Events;
 use Illuminate\Support\Arr;
-use App\Events\PluginWasEnabled;
-use App\Events\PluginWasDisabled;
 use Illuminate\Support\Collection;
 use App\Events\PluginWasUninstalled;
 use Illuminate\Filesystem\Filesystem;
@@ -131,7 +130,7 @@ class PluginManager
 
             $plugin->setEnabled(true);
 
-            // $this->dispatcher->fire(new PluginWasEnabled($plugin));
+            $this->dispatcher->fire(new Events\PluginWasEnabled($plugin));
         }
     }
 
@@ -153,7 +152,7 @@ class PluginManager
 
             $plugin->setEnabled(false);
 
-            // $this->dispatcher->fire(new PluginWasDisabled($plugin));
+            $this->dispatcher->fire(new Events\PluginWasDisabled($plugin));
         }
     }
 
@@ -173,7 +172,7 @@ class PluginManager
         // refresh plugin list
         $this->plugins = null;
 
-        // $this->dispatcher->fire(new PluginWasUninstalled($plugin));
+        $this->dispatcher->fire(new Events\PluginWasDeleted($plugin));
     }
 
     /**