FIX: redirect to original URL after social login

app/assets/javascripts/discourse/controllers/login.js.es6

@@ -217,7 +217,7 @@ export default Ember.Controller.extend(ModalFunctionality, {
 
     // Reload the page if we're authenticated
     if (options.authenticated) {
-      const destinationUrl = $.cookie('destination_url');
+      const destinationUrl = $.cookie('destination_url') || options.destination_url;
       if (destinationUrl) {
         // redirect client to the original URL
         $.cookie('destination_url', null);

app/controllers/users/omniauth_callbacks_controller.rb

@@ -41,6 +41,7 @@ class Users::OmniauthCallbacksController < ApplicationController
     @auth_result = authenticator.after_authenticate(auth)
 
     origin = request.env['omniauth.origin']
+
     if cookies[:destination_url].present?
       origin = cookies[:destination_url]
       cookies.delete(:destination_url)
@@ -53,8 +54,10 @@ class Users::OmniauthCallbacksController < ApplicationController
       end
     end
 
-    unless @origin.present?
+    if @origin.blank?
       @origin = Discourse.base_uri("/")
+    else
+      @auth_result.destination_url = origin
     end
 
     if @auth_result.failed?

lib/auth/result.rb

@@ -4,7 +4,7 @@ class Auth::Result
                 :awaiting_approval, :authenticated, :authenticator_name,
                 :requires_invite, :not_allowed_from_ip_address,
                 :admin_not_allowed_from_ip_address, :omit_username,
-                :skip_email_validation
+                :skip_email_validation, :destination_url
 
   attr_accessor(
     :failed,
@@ -42,13 +42,15 @@ class Auth::Result
                                      date: I18n.l(user.suspended_till, format: :date_only), reason: user.suspend_reason)
         }
       else
-        {
+        result = {
           authenticated: !!authenticated,
           awaiting_activation: !!awaiting_activation,
           awaiting_approval: !!awaiting_approval,
           not_allowed_from_ip_address: !!not_allowed_from_ip_address,
           admin_not_allowed_from_ip_address: !!admin_not_allowed_from_ip_address
         }
+        result[:destination_url] = destination_url if authenticated && destination_url.present?
+        result
       end
     else
       result = { email: email,