New listen API

Event subscriptions now take place before *any* boot method is called.
This ensures that all event listeners are registered before things
happen – e.g. locales are registered before the translator is
instantiated in the Tags extension's boot method.

framework/core/src/Support/Extension.php

@@ -1,6 +1,7 @@
 <?php namespace Flarum\Support;
 
 use Flarum\Support\ServiceProvider;
+use Illuminate\Events\Dispatcher;
 
 class Extension extends ServiceProvider
 {
@@ -11,4 +12,8 @@ class Extension extends ServiceProvider
     public function uninstall()
     {
     }
+
+    public function listen(Dispatcher $events)
+    {
+    }
 }

framework/core/src/Support/ExtensionsServiceProvider.php

@@ -21,5 +21,11 @@ class ExtensionsServiceProvider extends ServiceProvider
                 $providers[$extension] = $this->app->register($providerName);
             }
         }
+
+        $events = $this->app->make('events');
+
+        foreach ($providers as $provider) {
+            $provider->listen($events);
+        }
     }
 }

framework/core/stubs/extension/src/Extension.php

@@ -5,23 +5,8 @@ use Illuminate\Events\Dispatcher;
 
 class Extension extends BaseExtension
 {
-    /**
+    public function listen(Dispatcher $events)
-     * Bootstrap the application events.
-     *
-     * @return void
-     */
-    public function boot(Dispatcher $events)
     {
         $events->subscribe('{{namespace}}\Listeners\AddClientAssets');
     }
-
-    /**
-     * Register the service provider.
-     *
-     * @return void
-     */
-    public function register()
-    {
-        //
-    }
 }