Merge branch 'bvl-user-status-message-35463' into 'master'

Allow users to set a status

Closes #35463

See merge request gitlab-org/gitlab-ce!20614

66 files changed, 816 insertions, 18 deletions

diff --git a/app/assets/javascripts/notes/components/note_header.vue b/app/assets/javascripts/notes/components/note_header.vue
index ee3580895df..a621418cf72 100644
--- a/app/assets/javascripts/notes/components/note_header.vue
+++ b/app/assets/javascripts/notes/components/note_header.vue
@@ -74,6 +74,9 @@ export default {
     </div>
     <a :href="author.path">
       <span class="note-header-author-name">{{ author.name }}</span>
+      <span
+        v-if="author.status_tooltip_html"
+        v-html="author.status_tooltip_html"></span>
       <span class="note-headline-light">
         @{{ author.username }}
       </span>
diff --git a/app/assets/javascripts/vue_shared/components/header_ci_component.vue b/app/assets/javascripts/vue_shared/components/header_ci_component.vue
index 62d35f6547d..49fbce75110 100644
--- a/app/assets/javascripts/vue_shared/components/header_ci_component.vue
+++ b/app/assets/javascripts/vue_shared/components/header_ci_component.vue
@@ -113,6 +113,9 @@ export default {
 
           {{ user.name }}
         </a>
+        <span
+          v-if="user.status_tooltip_html"
+          v-html="user.status_tooltip_html"></span>
       </template>
     </section>
 
diff --git a/app/controllers/concerns/members_presentation.rb b/app/controllers/concerns/members_presentation.rb
index c0622516fd3..215e0bdf3cb 100644
--- a/app/controllers/concerns/members_presentation.rb
+++ b/app/controllers/concerns/members_presentation.rb
@@ -2,10 +2,18 @@ module MembersPresentation
   extend ActiveSupport::Concern
 
   def present_members(members)
+    preload_associations(members)
     Gitlab::View::Presenter::Factory.new(
       members,
       current_user: current_user,
       presenter_class: MembersPresenter
     ).fabricate!
   end
+
+  def preload_associations(members)
+    ActiveRecord::Associations::Preloader.new.preload(members, :user)
+    ActiveRecord::Associations::Preloader.new.preload(members, :source)
+    ActiveRecord::Associations::Preloader.new.preload(members.map(&:user), :status)
+    ActiveRecord::Associations::Preloader.new.preload(members.map(&:user), :u2f_registrations)
+  end
 end
diff --git a/app/controllers/concerns/membership_actions.rb b/app/controllers/concerns/membership_actions.rb
index 7a6a00b8e13..409e6d4c4d2 100644
--- a/app/controllers/concerns/membership_actions.rb
+++ b/app/controllers/concerns/membership_actions.rb
@@ -1,4 +1,5 @@
 module MembershipActions
+  include MembersPresentation
   extend ActiveSupport::Concern
 
   def create
@@ -20,6 +21,7 @@ module MembershipActions
       .execute(member)
       .present(current_user: current_user)
 
+    present_members([member])
     respond_to do |format|
       format.js { render 'shared/members/update', locals: { member: member } }
     end
diff --git a/app/controllers/concerns/notes_actions.rb b/app/controllers/concerns/notes_actions.rb
index fe9a030cdf2..5127db3f5fb 100644
--- a/app/controllers/concerns/notes_actions.rb
+++ b/app/controllers/concerns/notes_actions.rb
@@ -41,7 +41,7 @@ module NotesActions
     @note = Notes::CreateService.new(note_project, current_user, create_params).execute
 
     if @note.is_a?(Note)
-      Notes::RenderService.new(current_user).execute([@note])
+      prepare_notes_for_rendering([@note], noteable)
     end
 
     respond_to do |format|
@@ -56,7 +56,7 @@ module NotesActions
     @note = Notes::UpdateService.new(project, current_user, note_params).execute(note)
 
     if @note.is_a?(Note)
-      Notes::RenderService.new(current_user).execute([@note])
+      prepare_notes_for_rendering([@note])
     end
 
     respond_to do |format|
diff --git a/app/controllers/concerns/renders_notes.rb b/app/controllers/concerns/renders_notes.rb
index 36e3d76ecfe..cf04023080a 100644
--- a/app/controllers/concerns/renders_notes.rb
+++ b/app/controllers/concerns/renders_notes.rb
@@ -4,6 +4,7 @@ module RendersNotes
     preload_noteable_for_regular_notes(notes)
     preload_max_access_for_authors(notes, @project)
     preload_first_time_contribution_for_authors(noteable, notes)
+    preload_author_status(notes)
     Notes::RenderService.new(current_user).execute(notes)
 
     notes
@@ -28,4 +29,8 @@ module RendersNotes
 
     notes.each {|n| n.specialize_for_first_contribution!(noteable)}
   end
+
+  def preload_author_status(notes)
+    ActiveRecord::Associations::Preloader.new.preload(notes, { author: :status })
+  end
 end
diff --git a/app/controllers/groups/group_members_controller.rb b/app/controllers/groups/group_members_controller.rb
index ef5d5e5c742..7dc51f4c357 100644
--- a/app/controllers/groups/group_members_controller.rb
+++ b/app/controllers/groups/group_members_controller.rb
@@ -30,7 +30,7 @@ class Groups::GroupMembersController < Groups::ApplicationController
     end
 
     @members = @members.page(params[:page]).per(50)
-    @members = present_members(@members.includes(:user))
+    @members = present_members(@members)
 
     @requesters = present_members(
       AccessRequestsFinder.new(@group).execute(current_user))
diff --git a/app/controllers/profiles_controller.rb b/app/controllers/profiles_controller.rb
index 56a7b766b77..6f50cbb4a36 100644
--- a/app/controllers/profiles_controller.rb
+++ b/app/controllers/profiles_controller.rb
@@ -100,7 +100,8 @@ class ProfilesController < Profiles::ApplicationController
       :website_url,
       :organization,
       :preferred_language,
-      :private_profile
+      :private_profile,
+      status: [:emoji, :message]
     )
   end
 end
diff --git a/app/controllers/projects/commit_controller.rb b/app/controllers/projects/commit_controller.rb
index 1d1184d46d1..44b176d304e 100644
--- a/app/controllers/projects/commit_controller.rb
+++ b/app/controllers/projects/commit_controller.rb
@@ -22,7 +22,9 @@ class Projects::CommitController < Projects::ApplicationController
     apply_diff_view_cookie!
 
     respond_to do |format|
-      format.html  { render }
+      format.html  do
+        render
+      end
       format.diff  do
         send_git_diff(@project.repository, @commit.diff_refs)
       end
@@ -124,7 +126,10 @@ class Projects::CommitController < Projects::ApplicationController
   end
 
   def commit
-    @noteable = @commit ||= @project.commit_by(oid: params[:id])
+    @noteable = @commit ||= @project.commit_by(oid: params[:id]).tap do |commit|
+      # preload author and their status for rendering
+      commit&.author&.status
+    end
   end
 
   def define_commit_vars
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index 7c897b2d86c..ef8159aa553 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -165,7 +165,7 @@ class Projects::IssuesController < Projects::ApplicationController
     return @issue if defined?(@issue)
 
     # The Sortable default scope causes performance issues when used with find_by
-    @issuable = @noteable = @issue ||= @project.issues.where(iid: params[:id]).reorder(nil).take!
+    @issuable = @noteable = @issue ||= @project.issues.includes(author: :status).where(iid: params[:id]).reorder(nil).take!
     @note = @project.notes.new(noteable: @issuable)
 
     return render_404 unless can?(current_user, :read_issue, @issue)
diff --git a/app/controllers/projects/merge_requests/application_controller.rb b/app/controllers/projects/merge_requests/application_controller.rb
index 8e4aeec16dc..fead81dd472 100644
--- a/app/controllers/projects/merge_requests/application_controller.rb
+++ b/app/controllers/projects/merge_requests/application_controller.rb
@@ -6,7 +6,7 @@ class Projects::MergeRequests::ApplicationController < Projects::ApplicationCont
   private
 
   def merge_request
-    @issuable = @merge_request ||= @project.merge_requests.find_by!(iid: params[:id])
+    @issuable = @merge_request ||= @project.merge_requests.includes(author: :status).find_by!(iid: params[:id])
   end
 
   def merge_request_params
diff --git a/app/controllers/projects/notes_controller.rb b/app/controllers/projects/notes_controller.rb
index 4d4c2af2415..21e2145b73b 100644
--- a/app/controllers/projects/notes_controller.rb
+++ b/app/controllers/projects/notes_controller.rb
@@ -1,4 +1,5 @@
 class Projects::NotesController < Projects::ApplicationController
+  include RendersNotes
   include NotesActions
   include NotesHelper
   include ToggleAwardEmoji
@@ -53,7 +54,7 @@ class Projects::NotesController < Projects::ApplicationController
   private
 
   def render_json_with_notes_serializer
-    Notes::RenderService.new(current_user).execute([note])
+    prepare_notes_for_rendering([note])
 
     render json: note_serializer.represent(note)
   end
diff --git a/app/controllers/projects/pipelines_controller.rb b/app/controllers/projects/pipelines_controller.rb
index 45cef123c34..1d5d1ee5d5a 100644
--- a/app/controllers/projects/pipelines_controller.rb
+++ b/app/controllers/projects/pipelines_controller.rb
@@ -161,7 +161,11 @@ class Projects::PipelinesController < Projects::ApplicationController
   end
 
   def pipeline
-    @pipeline ||= project.pipelines.find_by!(id: params[:id]).present(current_user: current_user)
+    @pipeline ||= project
+                    .pipelines
+                    .includes(user: :status)
+                    .find_by!(id: params[:id])
+                    .present(current_user: current_user)
   end
 
   def commit
diff --git a/app/controllers/projects/snippets_controller.rb b/app/controllers/projects/snippets_controller.rb
index f742d7edf83..7c03d8ce827 100644
--- a/app/controllers/projects/snippets_controller.rb
+++ b/app/controllers/projects/snippets_controller.rb
@@ -88,7 +88,7 @@ class Projects::SnippetsController < Projects::ApplicationController
   protected
 
   def snippet
-    @snippet ||= @project.snippets.find(params[:id])
+    @snippet ||= @project.snippets.inc_relations_for_view.find(params[:id])
   end
   alias_method :awardable, :snippet
   alias_method :spammable, :snippet
diff --git a/app/controllers/snippets/notes_controller.rb b/app/controllers/snippets/notes_controller.rb
index c8b4682e6dc..217da89a1fd 100644
--- a/app/controllers/snippets/notes_controller.rb
+++ b/app/controllers/snippets/notes_controller.rb
@@ -9,7 +9,7 @@ class Snippets::NotesController < ApplicationController
   private
 
   def note
-    @note ||= snippet.notes.find(params[:id])
+    @note ||= snippet.notes.inc_relations_for_view.find(params[:id])
   end
   alias_method :awardable, :note
 
diff --git a/app/controllers/snippets_controller.rb b/app/controllers/snippets_controller.rb
index 1d6d0943674..dcf18c1f751 100644
--- a/app/controllers/snippets_controller.rb
+++ b/app/controllers/snippets_controller.rb
@@ -95,7 +95,7 @@ class SnippetsController < ApplicationController
   protected
 
   def snippet
-    @snippet ||= PersonalSnippet.find_by(id: params[:id])
+    @snippet ||= PersonalSnippet.inc_relations_for_view.find_by(id: params[:id])
   end
 
   alias_method :awardable, :snippet
diff --git a/app/helpers/issuables_helper.rb b/app/helpers/issuables_helper.rb
index 8766bb43cac..678fed9c414 100644
--- a/app/helpers/issuables_helper.rb
+++ b/app/helpers/issuables_helper.rb
@@ -159,6 +159,12 @@ module IssuablesHelper
     output << content_tag(:strong) do
       author_output = link_to_member(project, issuable.author, size: 24, mobile_classes: "d-none d-sm-inline", tooltip: true)
       author_output << link_to_member(project, issuable.author, size: 24, by_username: true, avatar: false, mobile_classes: "d-block d-sm-none")
+
+      if status = user_status(issuable.author)
+        author_output << "&ensp; #{status}".html_safe
+      end
+
+      author_output
     end
 
     output << "&ensp;".html_safe
diff --git a/app/helpers/profiles_helper.rb b/app/helpers/profiles_helper.rb
index e7aa92e6e5c..a6a57db3002 100644
--- a/app/helpers/profiles_helper.rb
+++ b/app/helpers/profiles_helper.rb
@@ -9,4 +9,8 @@ module ProfilesHelper
       end
     end
   end
+
+  def show_user_status_field?
+    Feature.enabled?(:user_status_form) || cookies[:feature_user_status_form] == 'true'
+  end
 end
diff --git a/app/helpers/users_helper.rb b/app/helpers/users_helper.rb
index 8ee4203b6f5..ceea4384f91 100644
--- a/app/helpers/users_helper.rb
+++ b/app/helpers/users_helper.rb
@@ -39,6 +39,24 @@ module UsersHelper
     "access:#{max_project_member_access(project)}"
   end
 
+  def user_status(user)
+    return unless user
+
+    unless user.association(:status).loaded?
+      exception = RuntimeError.new("Status was not preloaded")
+      Gitlab::Sentry.track_exception(exception, extra: { user: user.inspect })
+    end
+
+    return unless user.status
+
+    content_tag :span,
+                class: 'user-status-emoji has-tooltip',
+                title: user.status.message_html,
+                data: { html: true, placement: 'top' } do
+      emoji_icon user.status.emoji
+    end
+  end
+
   private
 
   def get_profile_tabs
diff --git a/app/models/note.rb b/app/models/note.rb
index fe3507adcb3..87cf7c7b2fa 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -101,7 +101,7 @@ class Note < ActiveRecord::Base
   scope :inc_author_project, -> { includes(:project, :author) }
   scope :inc_author, -> { includes(:author) }
   scope :inc_relations_for_view, -> do
-    includes(:project, :author, :updated_by, :resolved_by, :award_emoji,
+    includes(:project, { author: :status }, :updated_by, :resolved_by, :award_emoji,
              :system_note_metadata, :note_diff_file)
   end
 
diff --git a/app/models/snippet.rb b/app/models/snippet.rb
index 644120453cf..390bdbf838a 100644
--- a/app/models/snippet.rb
+++ b/app/models/snippet.rb
@@ -49,6 +49,7 @@ class Snippet < ActiveRecord::Base
   scope :are_public, -> { where(visibility_level: Snippet::PUBLIC) }
   scope :public_and_internal, -> { where(visibility_level: [Snippet::PUBLIC, Snippet::INTERNAL]) }
   scope :fresh,   -> { order("created_at DESC") }
+  scope :inc_relations_for_view, -> { includes(author: :status) }
 
   participant :author
   participant :notes_with_associations
diff --git a/app/models/user.rb b/app/models/user.rb
index 03549872924..31b49b9bf2a 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -141,6 +141,8 @@ class User < ActiveRecord::Base
   has_many :term_agreements
   belongs_to :accepted_term, class_name: 'ApplicationSetting::Term'
 
+  has_one :status, class_name: 'UserStatus'
+
   #
   # Validations
   #
diff --git a/app/models/user_status.rb b/app/models/user_status.rb
new file mode 100644
index 00000000000..2bbb0c59ac1
--- /dev/null
+++ b/app/models/user_status.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class UserStatus < ActiveRecord::Base
+  include CacheMarkdownField
+
+  self.primary_key = :user_id
+
+  DEFAULT_EMOJI = 'speech_balloon'.freeze
+
+  belongs_to :user
+
+  validates :user, presence: true
+  validates :emoji, inclusion: { in: Gitlab::Emoji.emojis_names }
+  validates :message, length: { maximum: 100 }, allow_blank: true
+
+  cache_markdown_field :message, pipeline: :emoji
+end
diff --git a/app/policies/user_policy.rb b/app/policies/user_policy.rb
index b5717029354..e1efd84e510 100644
--- a/app/policies/user_policy.rb
+++ b/app/policies/user_policy.rb
@@ -16,6 +16,7 @@ class UserPolicy < BasePolicy
   rule { ~subject_ghost & (user_is_self | admin) }.policy do
     enable :destroy_user
     enable :update_user
+    enable :update_user_status
   end
 
   rule { default }.enable :read_user_profile
diff --git a/app/serializers/concerns/user_status_tooltip.rb b/app/serializers/concerns/user_status_tooltip.rb
new file mode 100644
index 00000000000..aa6e67e3351
--- /dev/null
+++ b/app/serializers/concerns/user_status_tooltip.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module UserStatusTooltip
+  extend ActiveSupport::Concern
+  include ActionView::Helpers::TagHelper
+  include ActionView::Context
+  include EmojiHelper
+  include UsersHelper
+
+  included do
+    expose :user_status_if_loaded, as: :status_tooltip_html
+
+    def user_status_if_loaded
+      return nil unless object.association(:status).loaded?
+
+      user_status(object)
+    end
+  end
+end
diff --git a/app/serializers/user_entity.rb b/app/serializers/user_entity.rb
index 6236d66ff4a..656900bb8af 100644
--- a/app/serializers/user_entity.rb
+++ b/app/serializers/user_entity.rb
@@ -2,6 +2,7 @@
 
 class UserEntity < API::Entities::UserBasic
   include RequestAwareEntity
+  include UserStatusTooltip
 
   expose :path do |user|
     user_path(user)
diff --git a/app/services/users/set_status_service.rb b/app/services/users/set_status_service.rb
new file mode 100644
index 00000000000..89008368d5f
--- /dev/null
+++ b/app/services/users/set_status_service.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Users
+  class SetStatusService
+    include Gitlab::Allowable
+
+    attr_reader :current_user, :target_user, :params
+
+    def initialize(current_user, params)
+      @current_user, @params = current_user, params.dup
+      @target_user = params.delete(:user) || current_user
+    end
+
+    def execute
+      return false unless can?(current_user, :update_user_status, target_user)
+
+      if params[:emoji].present? || params[:message].present?
+        set_status
+      else
+        remove_status
+      end
+    end
+
+    private
+
+    def set_status
+      params[:emoji] = UserStatus::DEFAULT_EMOJI if params[:emoji].blank?
+      user_status.update(params)
+    end
+
+    def remove_status
+      UserStatus.delete(target_user.id)
+    end
+
+    def user_status
+      target_user.status || target_user.build_status
+    end
+  end
+end
diff --git a/app/services/users/update_service.rb b/app/services/users/update_service.rb
index 6dadb5a4eac..a897e4bd56a 100644
--- a/app/services/users/update_service.rb
+++ b/app/services/users/update_service.rb
@@ -7,6 +7,7 @@ module Users
     def initialize(current_user, params = {})
       @current_user = current_user
       @user = params.delete(:user)
+      @status_params = params.delete(:status)
       @params = params.dup
     end
 
@@ -17,10 +18,11 @@ module Users
 
       assign_attributes(&block)
 
-      if @user.save(validate: validate)
+      if @user.save(validate: validate) && update_status
         notify_success(user_exists)
       else
-        error(@user.errors.full_messages.uniq.join('. '))
+        messages = @user.errors.full_messages + Array(@user.status&.errors&.full_messages)
+        error(messages.uniq.join('. '))
       end
     end
 
@@ -34,6 +36,12 @@ module Users
 
     private
 
+    def update_status
+      return true unless @status_params
+
+      Users::SetStatusService.new(current_user, @status_params.merge(user: @user)).execute
+    end
+
     def notify_success(user_exists)
       notify_new_user(@user, nil) unless user_exists
 
diff --git a/app/views/profiles/show.html.haml b/app/views/profiles/show.html.haml
index a4835584b50..e7044f722c5 100644
--- a/app/views/profiles/show.html.haml
+++ b/app/views/profiles/show.html.haml
@@ -30,6 +30,18 @@
       - if @user.avatar?
         %hr
         = link_to _('Remove avatar'), profile_avatar_path, data: { confirm: _('Avatar will be removed. Are you sure?') }, method: :delete, class: 'btn btn-danger btn-inverted'
+
+  - if show_user_status_field?
+    %hr
+    .row
+      .col-lg-4.profile-settings-sidebar
+        %h4.prepend-top-0= s_("User|Current Status")
+        %p= s_("Profiles|This emoji and message will appear on your profile and throughout the interface. The message can contain emoji codes, too.")
+      .col-lg-8
+        .row
+          = f.fields_for :status, @user.status do |status_form|
+            = status_form.text_field :emoji
+            = status_form.text_field :message, maxlength: 100
   %hr
   .row
     .col-lg-4.profile-settings-sidebar
diff --git a/app/views/projects/commit/_commit_box.html.haml b/app/views/projects/commit/_commit_box.html.haml
index 78522393d4b..8afbbaf378f 100644
--- a/app/views/projects/commit/_commit_box.html.haml
+++ b/app/views/projects/commit/_commit_box.html.haml
@@ -13,6 +13,7 @@
     = author_avatar(@commit, size: 24, has_tooltip: false)
     %strong
       = commit_author_link(@commit, avatar: true, size: 24)
+    = user_status(@commit.author)
     - if @commit.different_committer?
       %span.light= _('Committed by')
       %strong
diff --git a/app/views/shared/members/_member.html.haml b/app/views/shared/members/_member.html.haml
index 46debe1f2b9..af29c0fe59e 100644
--- a/app/views/shared/members/_member.html.haml
+++ b/app/views/shared/members/_member.html.haml
@@ -11,6 +11,7 @@
       = image_tag avatar_icon_for_user(user, 40), class: "avatar s40", alt: ''
       .user-info
         = link_to user.name, user_path(user), class: 'member'
+        = user_status(user)
         %span.cgray= user.to_reference
 
         - if user == current_user
diff --git a/app/views/shared/notes/_note.html.haml b/app/views/shared/notes/_note.html.haml
index f5464058bc0..84adbd444c5 100644
--- a/app/views/shared/notes/_note.html.haml
+++ b/app/views/shared/notes/_note.html.haml
@@ -31,7 +31,9 @@
       .note-header
         .note-header-info
           %a{ href: user_path(note.author) }
-            %span.note-header-author-name= sanitize(note.author.name)
+            %span.note-header-author-name
+              = sanitize(note.author.name)
+            = user_status(note.author)
             %span.note-headline-light
               = note.author.to_reference
           %span.note-headline-light
diff --git a/app/views/shared/snippets/_header.html.haml b/app/views/shared/snippets/_header.html.haml
index 828ec870dc0..10bfc30492a 100644
--- a/app/views/shared/snippets/_header.html.haml
+++ b/app/views/shared/snippets/_header.html.haml
@@ -8,6 +8,7 @@
       Authored
       = time_ago_with_tooltip(@snippet.created_at, placement: 'bottom', html_class: 'snippet_updated_ago')
       by #{link_to_member(@project, @snippet.author, size: 24, author_class: "author item-title", avatar_class: "d-none d-sm-inline")}
+      = user_status(@snippet.author)
 
   .detail-page-header-actions
     - if @snippet.project_id?
diff --git a/app/views/users/show.html.haml b/app/views/users/show.html.haml
index 8d9e86d02c4..7a38d290915 100644
--- a/app/views/users/show.html.haml
+++ b/app/views/users/show.html.haml
@@ -40,6 +40,11 @@
         .cover-title
           = @user.name
 
+        - if @user.status
+          .cover-status
+            = emoji_icon(@user.status.emoji)
+            = markdown_field(@user.status, :message)
+
         .cover-desc.member-date
           %p
             %span.middle-dot-divider
diff --git a/changelogs/unreleased/bvl-user-status-message-35463.yml b/changelogs/unreleased/bvl-user-status-message-35463.yml
new file mode 100644
index 00000000000..c844e7ea0e4
--- /dev/null
+++ b/changelogs/unreleased/bvl-user-status-message-35463.yml
@@ -0,0 +1,5 @@
+---
+title: Users can set a status message and emoji
+merge_request: 20614
+author: niedermyer & davamr
+type: added
diff --git a/db/migrate/20180713092803_create_user_statuses.rb b/db/migrate/20180713092803_create_user_statuses.rb
new file mode 100644
index 00000000000..cbe21b89ad9
--- /dev/null
+++ b/db/migrate/20180713092803_create_user_statuses.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class CreateUserStatuses < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :user_statuses, id: false, primary_key: :user_id do |t|
+      t.references :user,
+                   foreign_key: { on_delete: :cascade },
+                   null: false,
+                   primary_key: true
+      t.integer :cached_markdown_version, limit: 4
+      t.string :emoji, null: false, default: 'speech_balloon'
+      t.string :message, limit: 100
+      t.string :message_html
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 905786172a2..6f3433c1003 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -2069,6 +2069,13 @@ ActiveRecord::Schema.define(version: 20180726172057) do
   add_index "user_interacted_projects", ["project_id", "user_id"], name: "index_user_interacted_projects_on_project_id_and_user_id", unique: true, using: :btree
   add_index "user_interacted_projects", ["user_id"], name: "index_user_interacted_projects_on_user_id", using: :btree
 
+  create_table "user_statuses", primary_key: "user_id", force: :cascade do |t|
+    t.integer "cached_markdown_version"
+    t.string "emoji", default: "speech_balloon", null: false
+    t.string "message", limit: 100
+    t.string "message_html"
+  end
+
   create_table "user_synced_attributes_metadata", force: :cascade do |t|
     t.boolean "name_synced", default: false
     t.boolean "email_synced", default: false
@@ -2374,6 +2381,7 @@ ActiveRecord::Schema.define(version: 20180726172057) do
   add_foreign_key "user_custom_attributes", "users", on_delete: :cascade
   add_foreign_key "user_interacted_projects", "projects", name: "fk_722ceba4f7", on_delete: :cascade
   add_foreign_key "user_interacted_projects", "users", name: "fk_0894651f08", on_delete: :cascade
+  add_foreign_key "user_statuses", "users", on_delete: :cascade
   add_foreign_key "user_synced_attributes_metadata", "users", on_delete: :cascade
   add_foreign_key "users", "application_setting_terms", column: "accepted_term_id", name: "fk_789cd90b35", on_delete: :cascade
   add_foreign_key "users_star_projects", "projects", name: "fk_22cd27ddfc", on_delete: :cascade
diff --git a/doc/api/users.md b/doc/api/users.md
index 07f9baf06d2..a8858468cab 100644
--- a/doc/api/users.md
+++ b/doc/api/users.md
@@ -440,6 +440,83 @@ GET /user
 }
 ```
 
+## User status
+
+Get the status of the currently signed in user.
+
+```
+GET /user/status
+```
+
+```bash
+curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/user/status"
+```
+
+Example response:
+
+```json
+{
+  "emoji":"coffee",
+  "message":"I crave coffee :coffee:",
+  "message_html": "I crave coffee <gl-emoji title=\"hot beverage\" data-name=\"coffee\" data-unicode-version=\"4.0\">☕</gl-emoji>"
+}
+```
+
+## Get the status of a user
+
+Get the status of a user.
+
+```
+GET /users/:id_or_username/status
+```
+
+| Attribute | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `id_or_username` | string | yes    | The id or username of the user to get a status of |
+
+```bash
+curl "https://gitlab.example.com/users/janedoe/status"
+```
+
+Example response:
+
+```json
+{
+  "emoji":"coffee",
+  "message":"I crave coffee :coffee:",
+  "message_html": "I crave coffee <gl-emoji title=\"hot beverage\" data-name=\"coffee\" data-unicode-version=\"4.0\">☕</gl-emoji>"
+}
+```
+
+## Set user status
+
+Set the status of the current user.
+
+```
+PUT /user/status
+```
+
+| Attribute | Type | Required | Description |
+| --------- | ---- | -------- | ----------- |
+| `emoji`   | string | no     | The name of the emoji to use as status, if omitted `speech_balloon` is used. Emoji name can be one of the specified names in the [Gemojione index][gemojione-index]. |
+| `message` | string | no     | The message to set as a status. It can also contain emoji codes. |
+
+When both parameters `emoji` and `message` are empty, the status will be cleared.
+
+```bash
+curl --request PUT --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" --data "emoji=coffee" --data "emoji=I crave coffee" https://gitlab.example.com/api/v4/user/status
+```
+
+Example responses
+
+```json
+{
+  "emoji":"coffee",
+  "message":"I crave coffee",
+  "message_html": "I crave coffee"
+}
+```
+
 ## List user projects
 
 Please refer to the [List of user projects ](projects.md#list-user-projects).
@@ -1167,3 +1244,5 @@ Example response:
 ```
 
 Please note that `last_activity_at` is deprecated, please use `last_activity_on`.
+
+[gemojione-index]: https://github.com/jonathanwiesel/gemojione/blob/master/config/index.json
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index 4be7707d3e7..f858d9fa23d 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -62,6 +62,14 @@ module API
       expose :admin?, as: :is_admin
     end
 
+    class UserStatus < Grape::Entity
+      expose :emoji
+      expose :message
+      expose :message_html do |entity|
+        MarkupHelper.markdown_field(entity, :message)
+      end
+    end
+
     class Email < Grape::Entity
       expose :id, :email
     end
diff --git a/lib/api/users.rb b/lib/api/users.rb
index e83887b3e9e..b0811bb4aad 100644
--- a/lib/api/users.rb
+++ b/lib/api/users.rb
@@ -121,6 +121,17 @@ module API
         present user, opts
       end
 
+      desc "Get the status of a user"
+      params do
+        requires :id_or_username, type: String, desc: 'The ID or username of the user'
+      end
+      get ":id_or_username/status" do
+        user = find_user(params[:id_or_username])
+        not_found!('User') unless user && can?(current_user, :read_user, user)
+
+        present user.status || {}, with: Entities::UserStatus
+      end
+
       desc 'Create a user. Available only for admins.' do
         success Entities::UserPublic
       end
@@ -740,6 +751,30 @@ module API
 
         present paginate(activities), with: Entities::UserActivity
       end
+
+      desc 'Set the status of the current user' do
+        success Entities::UserStatus
+      end
+      params do
+        optional :emoji, type: String, desc: "The emoji to set on the status"
+        optional :message, type: String, desc: "The status message to set"
+      end
+      put "status" do
+        forbidden! unless can?(current_user, :update_user_status, current_user)
+
+        if ::Users::SetStatusService.new(current_user, declared_params).execute
+          present current_user.status, with: Entities::UserStatus
+        else
+          render_validation_error!(current_user.status)
+        end
+      end
+
+      desc 'get the status of the current user' do
+        success Entities::UserStatus
+      end
+      get 'status' do
+        present current_user.status || {}, with: Entities::UserStatus
+      end
     end
   end
 end
diff --git a/lib/banzai/pipeline/emoji_pipeline.rb b/lib/banzai/pipeline/emoji_pipeline.rb
new file mode 100644
index 00000000000..a1b522f4303
--- /dev/null
+++ b/lib/banzai/pipeline/emoji_pipeline.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Banzai
+  module Pipeline
+    class EmojiPipeline < BasePipeline
+      # These filters will only perform sanitization of the content, preventing
+      # XSS, and replace emoji.
+      def self.filters
+        @filters ||= FilterArray[
+          Filter::HtmlEntityFilter,
+          Filter::SanitizationFilter,
+          Filter::EmojiFilter
+        ]
+      end
+    end
+  end
+end
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index a767c179dea..2d700fe8773 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -4081,6 +4081,9 @@ msgstr ""
 msgid "Profiles|This doesn't look like a public SSH key, are you sure you want to add it?"
 msgstr ""
 
+msgid "Profiles|This emoji and message will appear on your profile and throughout the interface. The message can contain emoji codes, too."
+msgstr ""
+
 msgid "Profiles|Type your %{confirmationValue} to confirm:"
 msgstr ""
 
@@ -5624,6 +5627,9 @@ msgstr ""
 msgid "Users"
 msgstr ""
 
+msgid "User|Current Status"
+msgstr ""
+
 msgid "Variables"
 msgstr ""
 
diff --git a/spec/controllers/profiles_controller_spec.rb b/spec/controllers/profiles_controller_spec.rb
index 4530a301d4d..360c536c667 100644
--- a/spec/controllers/profiles_controller_spec.rb
+++ b/spec/controllers/profiles_controller_spec.rb
@@ -78,6 +78,15 @@ describe ProfilesController, :request_store do
       expect(ldap_user.name).not_to eq('John')
       expect(ldap_user.location).to eq('City, Country')
     end
+
+    it 'allows setting a user status' do
+      sign_in(user)
+
+      put :update, user: { status: { message: 'Working hard!' } }
+
+      expect(user.reload.status.message).to eq('Working hard!')
+      expect(response).to have_gitlab_http_status(302)
+    end
   end
 
   describe 'PUT update_username' do
diff --git a/spec/controllers/projects/issues_controller_spec.rb b/spec/controllers/projects/issues_controller_spec.rb
index ff1835a34c2..5b347b1109a 100644
--- a/spec/controllers/projects/issues_controller_spec.rb
+++ b/spec/controllers/projects/issues_controller_spec.rb
@@ -993,6 +993,29 @@ describe Projects::IssuesController do
         expect(json_response.first.keys).to match_array(%w[id reply_id expanded notes diff_discussion discussion_path individual_note resolvable resolved resolved_at resolved_by resolved_by_push commit_id for_commit project_id])
       end
 
+      it 'renders the author status html if there is a status' do
+        create(:user_status, user: discussion.author)
+
+        get :discussions, namespace_id: project.namespace, project_id: project, id: issue.iid
+
+        note_json = json_response.first['notes'].first
+
+        expect(note_json['author']['status_tooltip_html']).to be_present
+      end
+
+      it 'does not cause an extra query for the status' do
+        control = ActiveRecord::QueryRecorder.new do
+          get :discussions, namespace_id: project.namespace, project_id: project, id: issue.iid
+        end
+
+        create(:user_status, user: discussion.author)
+        second_discussion = create(:discussion_note_on_issue, noteable: issue, project: issue.project, author: create(:user))
+        create(:user_status, user: second_discussion.author)
+
+        expect { get :discussions, namespace_id: project.namespace, project_id: project, id: issue.iid }
+          .not_to exceed_query_limit(control)
+      end
+
       context 'with cross-reference system note', :request_store do
         let(:new_issue) { create(:issue) }
         let(:cross_reference) { "mentioned in #{new_issue.to_reference(issue.project)}" }
diff --git a/spec/factories/user_statuses.rb b/spec/factories/user_statuses.rb
new file mode 100644
index 00000000000..9998ae9609c
--- /dev/null
+++ b/spec/factories/user_statuses.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :user_status do
+    user
+    emoji 'coffee'
+    message 'I crave coffee'
+  end
+end
diff --git a/spec/features/groups/members/list_members_spec.rb b/spec/features/groups/members/list_members_spec.rb
index 33f93fcc470..e1587a8b6a5 100644
--- a/spec/features/groups/members/list_members_spec.rb
+++ b/spec/features/groups/members/list_members_spec.rb
@@ -9,7 +9,7 @@ describe 'Groups > Members > List members' do
   let(:nested_group) { create(:group, parent: group) }
 
   before do
-    gitlab_sign_in(user1)
+    sign_in(user1)
   end
 
   it 'show members from current group and parent', :nested_groups do
@@ -32,6 +32,18 @@ describe 'Groups > Members > List members' do
     expect(second_row).to be_blank
   end
 
+  describe 'showing status of members' do
+    before do
+      group.add_developer(user2)
+    end
+
+    subject { visit group_group_members_path(group) }
+
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { user2 }
+    end
+  end
+
   def first_row
     page.all('ul.content-list > li')[0]
   end
diff --git a/spec/features/profiles/user_edit_profile_spec.rb b/spec/features/profiles/user_edit_profile_spec.rb
index 0b5eacbe916..96bbe6f93f1 100644
--- a/spec/features/profiles/user_edit_profile_spec.rb
+++ b/spec/features/profiles/user_edit_profile_spec.rb
@@ -55,4 +55,31 @@ describe 'User edit profile' do
       expect(page).to have_link('gravatar.com')
     end
   end
+
+  context 'user status' do
+    it 'hides user status when the feature is disabled' do
+      stub_feature_flags(user_status_form: false)
+
+      visit(profile_path)
+
+      expect(page).not_to have_content('Current Status')
+    end
+
+    it 'shows the status form when the feature is enabled' do
+      stub_feature_flags(user_status_form: true)
+
+      visit(profile_path)
+
+      expect(page).to have_content('Current Status')
+    end
+
+    it 'shows the status form when the feature is enabled by setting a cookie', :js do
+      stub_feature_flags(user_status_form: false)
+      set_cookie('feature_user_status_form', 'true')
+
+      visit(profile_path)
+
+      expect(page).to have_content('Current Status')
+    end
+  end
 end
diff --git a/spec/features/projects/commit/user_views_user_status_on_commit_spec.rb b/spec/features/projects/commit/user_views_user_status_on_commit_spec.rb
new file mode 100644
index 00000000000..e78b7f7ae08
--- /dev/null
+++ b/spec/features/projects/commit/user_views_user_status_on_commit_spec.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Project > Commit > View user status' do
+  include RepoHelpers
+
+  set(:project) { create(:project, :repository) }
+  set(:user) { create(:user) }
+  let(:commit_author) { create(:user, email: sample_commit.author_email) }
+
+  before do
+    sign_in(user)
+    project.add_developer(user)
+  end
+
+  subject { visit(project_commit_path(project, sample_commit.id)) }
+
+  describe 'status for the commit author' do
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { commit_author }
+    end
+  end
+
+  describe 'status for a comment on the commit' do
+    let(:note) { create(:note, :on_commit, project: project) }
+
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { note.author }
+    end
+  end
+
+  describe 'status for a diff note on the commit' do
+    let(:note) { create(:diff_note_on_commit, project: project) }
+
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { note.author }
+    end
+  end
+end
diff --git a/spec/features/projects/issues/user_views_issue_spec.rb b/spec/features/projects/issues/user_views_issue_spec.rb
index 4093876c289..117e5986f29 100644
--- a/spec/features/projects/issues/user_views_issue_spec.rb
+++ b/spec/features/projects/issues/user_views_issue_spec.rb
@@ -29,4 +29,22 @@ describe "User views issue" do
       expect(page).not_to have_link('Close issue')
     end
   end
+
+  describe 'user status' do
+    subject { visit(project_issue_path(project, issue)) }
+
+    describe 'showing status of the author of the issue' do
+      it_behaves_like 'showing user status' do
+        let(:user_with_status) { issue.author }
+      end
+    end
+
+    describe 'showing status of a user who commented on an issue', :js do
+      let!(:note) { create(:note, noteable: issue, project: project, author: user_with_status) }
+
+      it_behaves_like 'showing user status' do
+        let(:user_with_status) { create(:user) }
+      end
+    end
+  end
 end
diff --git a/spec/features/projects/members/group_members_spec.rb b/spec/features/projects/members/group_members_spec.rb
index 41b2beb40b9..0b2cd13b8ec 100644
--- a/spec/features/projects/members/group_members_spec.rb
+++ b/spec/features/projects/members/group_members_spec.rb
@@ -87,4 +87,12 @@ describe 'Projects members' do
       end
     end
   end
+
+  describe 'showing status of members' do
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { developer }
+
+      subject { visit project_settings_members_path(project) }
+    end
+  end
 end
diff --git a/spec/features/projects/merge_requests/user_views_user_status_on_merge_request_spec.rb b/spec/features/projects/merge_requests/user_views_user_status_on_merge_request_spec.rb
new file mode 100644
index 00000000000..78d9c6c6db1
--- /dev/null
+++ b/spec/features/projects/merge_requests/user_views_user_status_on_merge_request_spec.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Project > Merge request > View user status' do
+  let(:project) { create(:project, :public, :repository) }
+  let(:merge_request) do
+    create(:merge_request, source_project: project, target_project: project, author: create(:user))
+  end
+
+  subject { visit merge_request_path(merge_request) }
+
+  describe 'the status of the merge request author' do
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { merge_request.author }
+    end
+  end
+
+  context 'for notes', :js do
+    describe 'the status of the author of a note on a merge request' do
+      let(:note) { create(:note, noteable: merge_request, project: project, author: create(:user)) }
+
+      it_behaves_like 'showing user status' do
+        let(:user_with_status) { note.author }
+      end
+    end
+
+    describe 'the status of the author of a diff note on a merge request' do
+      let(:note) { create(:diff_note_on_merge_request, noteable: merge_request, project: project, author: create(:user)) }
+
+      it_behaves_like 'showing user status' do
+        let(:user_with_status) { note.author }
+      end
+    end
+  end
+end
diff --git a/spec/features/projects/pipelines/pipeline_spec.rb b/spec/features/projects/pipelines/pipeline_spec.rb
index ecc7cf84138..a84492ea5f1 100644
--- a/spec/features/projects/pipelines/pipeline_spec.rb
+++ b/spec/features/projects/pipelines/pipeline_spec.rb
@@ -63,6 +63,12 @@ describe 'Pipeline', :js do
       expect(page).to have_css('#js-tab-pipeline.active')
     end
 
+    it_behaves_like 'showing user status' do
+      let(:user_with_status) { pipeline.user }
+
+      subject { visit project_pipeline_path(project, pipeline) }
+    end
+
     describe 'pipeline graph' do
       context 'when pipeline has running builds' do
         it 'shows a running icon and a cancel action for the running build' do
diff --git a/spec/features/projects/snippets/show_spec.rb b/spec/features/projects/snippets/show_spec.rb
index 3cc797277dd..f3dc13fb52f 100644
--- a/spec/features/projects/snippets/show_spec.rb
+++ b/spec/features/projects/snippets/show_spec.rb
@@ -141,4 +141,16 @@ describe 'Projects > Snippets > Project snippet', :js do
       end
     end
   end
+
+  it_behaves_like 'showing user status' do
+    let(:file_name) { 'ruby-style-guide.md' }
+    let(:content) { project.repository.blob_at('master', 'files/markdown/ruby-style-guide.md').data }
+
+    let(:user_with_status) { snippet.author }
+
+    subject do
+      visit project_snippet_path(project, snippet)
+      wait_for_requests
+    end
+  end
 end
diff --git a/spec/features/snippets/notes_on_personal_snippets_spec.rb b/spec/features/snippets/notes_on_personal_snippets_spec.rb
index 269351e55c9..1442e011d52 100644
--- a/spec/features/snippets/notes_on_personal_snippets_spec.rb
+++ b/spec/features/snippets/notes_on_personal_snippets_spec.rb
@@ -16,6 +16,8 @@ describe 'Comments on personal snippets', :js do
   before do
     sign_in user
     visit snippet_path(snippet)
+
+    wait_for_requests
   end
 
   subject { page }
@@ -42,6 +44,15 @@ describe 'Comments on personal snippets', :js do
         expect(page).to have_selector('.note-emoji-button')
       end
     end
+
+    it 'shows the status of a note author' do
+      status = create(:user_status, user: user)
+      visit snippet_path(snippet)
+
+      within("#note_#{snippet_notes[0].id}") do
+        expect(page).to show_user_status(status)
+      end
+    end
   end
 
   context 'when submitting a note' do
diff --git a/spec/features/snippets/show_spec.rb b/spec/features/snippets/show_spec.rb
index f31457db92f..3fe0b60b18f 100644
--- a/spec/features/snippets/show_spec.rb
+++ b/spec/features/snippets/show_spec.rb
@@ -155,4 +155,12 @@ describe 'Snippet', :js do
       end
     end
   end
+
+  it_behaves_like 'showing user status' do
+    let(:file_name) { 'popen.rb' }
+    let(:content) { project.repository.blob_at('master', 'files/ruby/popen.rb').data }
+    let(:user_with_status) { snippet.author }
+
+    subject { visit snippet_path(snippet) }
+  end
 end
diff --git a/spec/features/users/show_spec.rb b/spec/features/users/show_spec.rb
index 207c333c636..bc07ab48c39 100644
--- a/spec/features/users/show_spec.rb
+++ b/spec/features/users/show_spec.rb
@@ -53,6 +53,14 @@ describe 'User page' do
     end
   end
 
+  it 'shows the status if there was one' do
+    create(:user_status, user: user, message: "Working hard!")
+
+    visit(user_path(user))
+
+    expect(page).to have_content("Working hard!")
+  end
+
   context 'signup disabled' do
     it 'shows the sign in link' do
       stub_application_setting(signup_enabled: false)
diff --git a/spec/lib/banzai/pipeline/emoji_pipeline_spec.rb b/spec/lib/banzai/pipeline/emoji_pipeline_spec.rb
new file mode 100644
index 00000000000..744df3e0b96
--- /dev/null
+++ b/spec/lib/banzai/pipeline/emoji_pipeline_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Banzai::Pipeline::EmojiPipeline do
+  def parse(text)
+    described_class.to_html(text, {})
+  end
+
+  it 'replaces emoji' do
+    expected_result = "Hello world #{Gitlab::Emoji.gl_emoji_tag('100')}"
+
+    expect(parse('Hello world :100:')).to eq(expected_result)
+  end
+
+  it 'filters out HTML tags' do
+    expected_result = "Hello &lt;b&gt;world&lt;/b&gt; #{Gitlab::Emoji.gl_emoji_tag('100')}"
+
+    expect(parse('Hello <b>world</b> :100:')).to eq(expected_result)
+  end
+end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 982d24e7eab..f5e2c977104 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -20,6 +20,7 @@ describe User do
 
   describe 'associations' do
     it { is_expected.to have_one(:namespace) }
+    it { is_expected.to have_one(:status) }
     it { is_expected.to have_many(:snippets).dependent(:destroy) }
     it { is_expected.to have_many(:members) }
     it { is_expected.to have_many(:project_members) }
diff --git a/spec/models/user_status_spec.rb b/spec/models/user_status_spec.rb
new file mode 100644
index 00000000000..fcc01cdae3d
--- /dev/null
+++ b/spec/models/user_status_spec.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe UserStatus do
+  it { is_expected.to validate_presence_of(:user) }
+
+  it { is_expected.to allow_value('smirk').for(:emoji) }
+  it { is_expected.not_to allow_value('hello world').for(:emoji) }
+  it { is_expected.not_to allow_value('').for(:emoji) }
+
+  it { is_expected.to validate_length_of(:message).is_at_most(100) }
+  it { is_expected.to allow_value('').for(:message) }
+
+  it 'is expected to be deleted when the user is deleted' do
+    status = create(:user_status)
+
+    expect { status.user.destroy }.to change { described_class.count }.from(1).to(0)
+  end
+end
diff --git a/spec/policies/user_policy_spec.rb b/spec/policies/user_policy_spec.rb
index a7a77abc3ee..7e0a1824200 100644
--- a/spec/policies/user_policy_spec.rb
+++ b/spec/policies/user_policy_spec.rb
@@ -35,6 +35,10 @@ describe UserPolicy do
     end
   end
 
+  describe "updating a user's status" do
+    it_behaves_like 'changing a user', :update_user_status
+  end
+
   describe "destroying a user" do
     it_behaves_like 'changing a user', :destroy_user
   end
diff --git a/spec/requests/api/users_spec.rb b/spec/requests/api/users_spec.rb
index 6a051f865aa..d48d577afa1 100644
--- a/spec/requests/api/users_spec.rb
+++ b/spec/requests/api/users_spec.rb
@@ -13,6 +13,27 @@ describe API::Users do
   let(:not_existing_pat_id) { (PersonalAccessToken.maximum('id') || 0 ) + 10 }
   let(:private_user) { create(:user, private_profile: true) }
 
+  shared_examples 'rendering user status' do
+    it 'returns the status if there was one' do
+      create(:user_status, user: user)
+
+      get api(path, user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(json_response['message']).to be_present
+      expect(json_response['message_html']).to be_present
+      expect(json_response['emoji']).to be_present
+    end
+
+    it 'returns an empty response if there was no status' do
+      get api(path, user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(json_response['message']).to be_nil
+      expect(json_response['emoji']).to be_nil
+    end
+  end
+
   describe 'GET /users' do
     context "when unauthenticated" do
       it "returns authorization error when the `username` parameter is not passed" do
@@ -310,6 +331,20 @@ describe API::Users do
     end
   end
 
+  describe 'GET /users/:id_or_username/status' do
+    context 'when finding the user by id' do
+      it_behaves_like 'rendering user status' do
+        let(:path) { "/users/#{user.id}/status" }
+      end
+    end
+
+    context 'when finding the user by username' do
+      it_behaves_like 'rendering user status' do
+        let(:path) { "/users/#{user.username}/status" }
+      end
+    end
+  end
+
   describe "POST /users" do
     before do
       admin
@@ -1774,6 +1809,34 @@ describe API::Users do
     end
   end
 
+  describe 'GET /user/status' do
+    let(:path) { '/user/status' }
+    it_behaves_like 'rendering user status'
+  end
+
+  describe 'PUT /user/status' do
+    it 'saves the status' do
+      put api('/user/status', user), { emoji: 'smirk', message: 'hello world' }
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(json_response['emoji']).to eq('smirk')
+    end
+
+    it 'renders errors when the status was invalid' do
+      put api('/user/status', user), { emoji: 'does not exist', message: 'hello world' }
+
+      expect(response).to have_gitlab_http_status(400)
+      expect(json_response['message']['emoji']).to be_present
+    end
+
+    it 'deletes the status when passing empty values' do
+      put api('/user/status', user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(user.reload.status).to be_nil
+    end
+  end
+
   describe 'GET /users/:user_id/impersonation_tokens' do
     let!(:active_personal_access_token) { create(:personal_access_token, user: user) }
     let!(:revoked_personal_access_token) { create(:personal_access_token, :revoked, user: user) }
diff --git a/spec/services/users/set_status_service_spec.rb b/spec/services/users/set_status_service_spec.rb
new file mode 100644
index 00000000000..8a8458ab9de
--- /dev/null
+++ b/spec/services/users/set_status_service_spec.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Users::SetStatusService do
+  let(:current_user) { create(:user) }
+  subject(:service) { described_class.new(current_user, params) }
+
+  describe '#execute' do
+    context 'when when params are set' do
+      let(:params) { { emoji: 'taurus', message: 'a random status' } }
+
+      it 'creates a status' do
+        service.execute
+
+        expect(current_user.status.emoji).to eq('taurus')
+        expect(current_user.status.message).to eq('a random status')
+      end
+
+      it 'updates a status if it already existed' do
+        create(:user_status, user: current_user)
+
+        expect { service.execute }.not_to change { UserStatus.count }
+        expect(current_user.status.message).to eq('a random status')
+      end
+
+      context 'for another user' do
+        let(:target_user) { create(:user) }
+        let(:params) do
+          { emoji: 'taurus', message: 'a random status', user: target_user }
+        end
+
+        context 'the current user is admin' do
+          let(:current_user) { create(:admin) }
+
+          it 'changes the status when the current user is allowed to do that' do
+            expect { service.execute }.to change { target_user.status }
+          end
+        end
+
+        it 'does not update the status if the current user is not allowed' do
+          expect { service.execute }.not_to change { target_user.status }
+        end
+      end
+    end
+
+    context 'without params' do
+      let(:params) { {} }
+
+      it 'deletes the status' do
+        status = create(:user_status, user: current_user)
+
+        expect { service.execute }
+          .to change { current_user.reload.status }.from(status).to(nil)
+      end
+    end
+  end
+end
diff --git a/spec/services/users/update_service_spec.rb b/spec/services/users/update_service_spec.rb
index a4b7fe4674f..529c8485202 100644
--- a/spec/services/users/update_service_spec.rb
+++ b/spec/services/users/update_service_spec.rb
@@ -30,6 +30,27 @@ describe Users::UpdateService do
       expect(result[:message]).to eq('Username has already been taken')
     end
 
+    it 'updates the status if status params were given' do
+      update_user(user, status: { message: "On a call" })
+
+      expect(user.status.message).to eq("On a call")
+    end
+
+    it 'does not delete the status if no status param was passed' do
+      create(:user_status, user: user, message: 'Busy!')
+
+      update_user(user, name: 'New name')
+
+      expect(user.status.message).to eq('Busy!')
+    end
+
+    it 'includes status error messages' do
+      result = update_user(user, status: { emoji: "Moo!" })
+
+      expect(result[:status]).to eq(:error)
+      expect(result[:message]).to eq("Emoji is not included in the list")
+    end
+
     def update_user(user, opts)
       described_class.new(user, opts.merge(user: user)).execute
     end
diff --git a/spec/support/matchers/user_status_matcher.rb b/spec/support/matchers/user_status_matcher.rb
new file mode 100644
index 00000000000..3cf240d874a
--- /dev/null
+++ b/spec/support/matchers/user_status_matcher.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+RSpec::Matchers.define :show_user_status do |status|
+  match do |page|
+    expect(page).to have_selector(".user-status-emoji[title='#{status.message}']")
+
+    # The same user status might be displayed multiple times on the page
+    emoji_span = page.first(".user-status-emoji[title='#{status.message}']")
+    page.within(emoji_span) do
+      expect(page).to have_emoji(status.emoji)
+    end
+  end
+end
diff --git a/spec/support/shared_examples/showing_user_status_shared_examples.rb b/spec/support/shared_examples/showing_user_status_shared_examples.rb
new file mode 100644
index 00000000000..eef769de2fc
--- /dev/null
+++ b/spec/support/shared_examples/showing_user_status_shared_examples.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+shared_examples 'showing user status' do
+  let!(:status) { create(:user_status, user: user_with_status, emoji: 'smirk', message: 'Authoring this object') }
+
+  it 'shows the status' do
+    subject
+
+    expect(page).to show_user_status(status)
+  end
+end
diff --git a/spec/views/projects/merge_requests/show.html.haml_spec.rb b/spec/views/projects/merge_requests/show.html.haml_spec.rb
index fe6ad26a6f6..fa6c4ce4ac8 100644
--- a/spec/views/projects/merge_requests/show.html.haml_spec.rb
+++ b/spec/views/projects/merge_requests/show.html.haml_spec.rb
@@ -17,6 +17,13 @@ describe 'projects/merge_requests/show.html.haml' do
       author: user)
   end
 
+  def preload_view_requirements
+    # This will load the status fields of the author of the note and merge request
+    # to avoid queries in when rendering the view being tested.
+    closed_merge_request.author.status
+    note.author.status
+  end
+
   before do
     assign(:project, project)
     assign(:merge_request, closed_merge_request)
@@ -26,6 +33,8 @@ describe 'projects/merge_requests/show.html.haml' do
     assign(:notes, [])
     assign(:pipelines, Ci::Pipeline.none)
 
+    preload_view_requirements
+
     allow(view).to receive_messages(current_user: user,
                                     can?: true,
                                     current_application_settings: Gitlab::CurrentSettings.current_application_settings)
@@ -42,6 +51,7 @@ describe 'projects/merge_requests/show.html.haml' do
     it 'does not show the "Reopen" button when the source project does not exist' do
       unlink_project.execute
       closed_merge_request.reload
+      preload_view_requirements
 
       render
 
@@ -56,6 +66,7 @@ describe 'projects/merge_requests/show.html.haml' do
       forked_project.destroy
       # Reload merge request so MergeRequest#source_project turns to `nil`
       closed_merge_request.reload
+      preload_view_requirements
 
       render