Allow provision of an avatar URL to upload during sign up

This can be used by authentication extensions (i.e. mirror Facebook/Twitter profile picture). Rough implementation, needs refactoring.

js/forum/src/components/SignUpModal.js

@@ -73,7 +73,7 @@ export default class SignUpModal extends Modal {
 
       <div className="Form Form--centered">
         <div className="Form-group">
-          <input className="FormControl" name="username" placeholder={extractText(app.translator.trans('core.forum.sign_up.username_placeholder'))}
+          <input className="FormControl" name="username" type="text" placeholder={extractText(app.translator.trans('core.forum.sign_up.username_placeholder'))}
             value={this.username()}
             onchange={m.withAttr('value', this.username)}
             disabled={this.loading} />
@@ -216,6 +216,10 @@ export default class SignUpModal extends Modal {
       data.password = this.password();
     }
 
+    if (this.props.avatarUrl) {
+      data.avatarUrl = this.props.avatarUrl;
+    }
+
     return data;
   }
 }

src/Core/Command/RegisterUserHandler.php

@@ -16,9 +16,16 @@ use Flarum\Core\AuthToken;
 use Flarum\Core\Validator\UserValidator;
 use Flarum\Event\UserWillBeSaved;
 use Flarum\Core\Support\DispatchEventsTrait;
+use Flarum\Foundation\Application;
 use Flarum\Settings\SettingsRepositoryInterface;
 use Flarum\Core\Exception\PermissionDeniedException;
 use Illuminate\Contracts\Events\Dispatcher;
+use Illuminate\Support\Str;
+use Intervention\Image\ImageManager;
+use League\Flysystem\Adapter\Local;
+use League\Flysystem\Filesystem;
+use League\Flysystem\FilesystemInterface;
+use League\Flysystem\MountManager;
 
 class RegisterUserHandler
 {
@@ -35,16 +42,30 @@ class RegisterUserHandler
      */
     protected $validator;
 
+    /**
+     * @var Application
+     */
+    protected $app;
+
+    /**
+     * @var FilesystemInterface
+     */
+    protected $uploadDir;
+
     /**
      * @param Dispatcher $events
      * @param SettingsRepositoryInterface $settings
      * @param UserValidator $validator
+     * @param Application $app
+     * @param FilesystemInterface $uploadDir
      */
-    public function __construct(Dispatcher $events, SettingsRepositoryInterface $settings, UserValidator $validator)
+    public function __construct(Dispatcher $events, SettingsRepositoryInterface $settings, UserValidator $validator, Application $app, FilesystemInterface $uploadDir)
     {
         $this->events = $events;
         $this->settings = $settings;
         $this->validator = $validator;
+        $this->app = $app;
+        $this->uploadDir = $uploadDir;
     }
 
     /**
@@ -98,6 +119,8 @@ class RegisterUserHandler
 
         $this->validator->assertValid(array_merge($user->getAttributes(), compact('password')));
 
+        $this->saveAvatarFromUrl($user, array_get($data, 'attributes.avatarUrl'));
+
         $user->save();
 
         if (isset($token)) {
@@ -108,4 +131,23 @@ class RegisterUserHandler
 
         return $user;
     }
+
+    private function saveAvatarFromUrl(User $user, $avatarUrl)
+    {
+        $tmpFile = tempnam($this->app->storagePath().'/tmp', 'avatar');
+
+        $manager = new ImageManager;
+        $manager->make($avatarUrl)->fit(100, 100)->save($tmpFile);
+
+        $mount = new MountManager([
+            'source' => new Filesystem(new Local(pathinfo($tmpFile, PATHINFO_DIRNAME))),
+            'target' => $this->uploadDir,
+        ]);
+
+        $uploadName = Str::lower(Str::quickRandom()) . '.jpg';
+
+        $user->changeAvatarPath($uploadName);
+
+        $mount->move("source://".pathinfo($tmpFile, PATHINFO_BASENAME), "target://$uploadName");
+    }
 }

src/Core/CoreServiceProvider.php

@@ -55,6 +55,10 @@ class CoreServiceProvider extends AbstractServiceProvider
         $this->app->when('Flarum\Core\Command\DeleteAvatarHandler')
             ->needs('League\Flysystem\FilesystemInterface')
             ->give($avatarsFilesystem);
+
+        $this->app->when('Flarum\Core\Command\RegisterUserHandler')
+            ->needs('League\Flysystem\FilesystemInterface')
+            ->give($avatarsFilesystem);
     }
 
     /**