3 files changed, 28 insertions, 0 deletions
diff --git a/lib/api/api.rb b/lib/api/api.rb
index 7ea575a9661..e2ad3c5f4e3 100644
--- a/lib/api/api.rb
+++ b/lib/api/api.rb
@@ -83,6 +83,7 @@ module API
     # Keep in alphabetical order
     mount ::API::AccessRequests
     mount ::API::Applications
+    mount ::API::Avatar
     mount ::API::AwardEmoji
     mount ::API::Badges
     mount ::API::Boards
diff --git a/lib/api/avatar.rb b/lib/api/avatar.rb
new file mode 100644
index 00000000000..70219bc8ea0
--- /dev/null
+++ b/lib/api/avatar.rb
@@ -0,0 +1,21 @@
+module API
+  class Avatar < Grape::API
+    resource :avatar do
+      desc 'Return avatar url for a user' do
+        success Entities::Avatar
+      end
+      params do
+        requires :email, type: String, desc: 'Public email address of the user'
+        optional :size, type: Integer, desc: 'Single pixel dimension for Gravatar images'
+      end
+      get do
+        forbidden!('Unauthorized access') unless can?(current_user, :read_users_list)
+
+        user = User.find_by_public_email(params[:email])
+        user ||= User.new(email: params[:email])
+
+        present user, with: Entities::Avatar, size: params[:size]
+      end
+    end
+  end
+end
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index c76d3ff45d0..22afcb9edf2 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -694,6 +694,12 @@ module API
       expose :notes, using: Entities::Note
     end
 
+    class Avatar < Grape::Entity
+      expose :avatar_url do |avatarable, options|
+        avatarable.avatar_url(only_path: false, size: options[:size])
+      end
+    end
+
     class AwardEmoji < Grape::Entity
       expose :id
       expose :name