Admin can see and remove user identities

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CHANGELOG

@@ -7,6 +7,7 @@ v 7.13.0 (unreleased)
   - Rename "Design" profile settings page to "Preferences".
   - Allow users to customize their default Dashboard page.
   - Update ssl_ciphers in Nginx example to remove DHE settings. This will deny forward secrecy for Android 2.3.7, Java 6 and OpenSSL 0.9.8
+  - Admin can remove user identities
 v 7.12.0 (unreleased)
   - Fix post-receive errors on a push when an external issue tracker is configured (Stan Hu)

app/controllers/admin/identities_controller.rb

+class Admin::IdentitiesController < Admin::ApplicationController
+  before_action :user, only: [:destroy]
+
+  def destroy
+    identity = user.identities.find(params[:id])
+
+    respond_to do |format|
+      if identity.destroy
+        format.html { redirect_to [:admin, user], notice: 'User identity was successfully removed.' }
+      else
+        format.html { redirect_to [:admin, user], alert: 'Failed to remove user identity.' }
+      end
+    end
+  end
+
+  protected
+
+  def user
+    @user ||= User.find_by!(username: params[:user_id])
+  end
+end

app/views/admin/identities/_identity.html.haml

+%tr
+  %td
+    = identity.provider
+  %td
+    = identity.extern_uid
+  %td
+    = link_to [:admin, @user, identity], method: :delete,
+      class: 'btn btn-xs btn-danger',
+      data: { confirm: "Are you sure you want to remove this identity" } do
+      %i.fa.fa-trash
+      Delete

app/views/admin/users/show.html.haml

@@ -23,6 +23,8 @@
     %a{"data-toggle" => "tab", href: "#projects"} Projects
   %li
     %a{"data-toggle" => "tab", href: "#ssh-keys"} SSH keys
+  %li
+    %a{"data-toggle" => "tab", href: "#identities"} Identities
 .tab-content
   #account.tab-pane.active
@@ -230,3 +232,15 @@
                           %i.fa.fa-times
   #ssh-keys.tab-pane
     = render 'profiles/keys/key_table', admin: true
+
+  #identities.tab-pane
+    - if @user.identities.present?
+      %table.table
+        %thead
+          %tr
+            %th Provider
+            %th Id
+            %th
+        = render @user.identities
+    - else
+      %h4 This user has no identities

config/routes.rb

@@ -149,6 +149,8 @@ Gitlab::Application.routes.draw do
   namespace :admin do
     resources :users, constraints: { id: /[a-zA-Z.\/0-9_\-]+/ } do
       resources :keys, only: [:show, :destroy]
+      resources :identities, only: [:destroy]
+
       member do
         put :team_update
         put :block