Add notes filters for epics

app/serializers/user_preference_entity.rb

@@ -12,3 +12,5 @@ class UserPreferenceEntity < Grape::Entity
     UserPreference::NOTES_FILTERS[:all_notes]
   end
 end
+
+UserPreferenceEntity.prepend(EE::UserPreferenceEntity)

db/schema.rb

@@ -2972,6 +2972,7 @@ ActiveRecord::Schema.define(version: 20190115054216) do
     t.datetime_with_timezone "updated_at", null: false
     t.string "epics_sort"
     t.integer "roadmap_epics_state"
+    t.integer "epic_notes_filter", limit: 2, default: 0, null: false
     t.index ["user_id"], name: "index_user_preferences_on_user_id", unique: true, using: :btree
   end
 

doc/user/discussions/index.md

@@ -350,7 +350,7 @@ Replying to this email will, consequentially, create a new comment on the associ
 For issues with many comments like activity notes and user comments, sometimes 
 finding useful information can be hard. There is a way to filter comments from single notes and discussions for merge requests and issues.  
 
-From a merge request's **Discussion** tab, or from an issue overview, find the filter's dropdown menu on the right side of the page, from which you can choose one of the following options:
+From a merge request's **Discussion** tab, or from an epic/issue overview, find the filter's dropdown menu on the right side of the page, from which you can choose one of the following options:
 
 - **Show all activity**: displays all user comments and system notes
 (issue updates, mentions from other issues, changes to the description, etc).

ee/app/models/ee/user_preference.rb

@@ -8,6 +8,8 @@ module EE
       validates :roadmap_epics_state, allow_nil: true, inclusion: {
         in: ::Epic.states.values, message: "%{value} is not a valid epic state"
       }
+
+      validates :epic_notes_filter, inclusion: { in: ::UserPreference::NOTES_FILTERS.values }, presence: true
     end
   end
 end

ee/app/serializers/ee/user_preference_entity.rb

+# frozen_string_literal: true
+
+module EE
+  module UserPreferenceEntity
+    extend ActiveSupport::Concern
+
+    prepended do
+      expose :epic_notes_filter
+    end
+  end
+end

ee/app/views/groups/epics/_discussion.html.haml

@@ -3,5 +3,5 @@
 %section.js-vue-notes-event
   #js-vue-notes{ data: { notes_data: notes_data(@epic).to_json,
     noteable_data: EpicSerializer.new(current_user: current_user).represent(@epic).to_json,
-    current_user_data: UserSerializer.new.represent(current_user, only_path: true).to_json, noteable_type: 'epic',
+    current_user_data: UserSerializer.new.represent(current_user, { only_path: true }, CurrentUserEntity).to_json, noteable_type: 'epic',
     markdown_version: @issuable.cached_markdown_version } }

ee/app/views/groups/epics/show.html.haml

@@ -18,8 +18,10 @@
 
 .content-block.emoji-block
   .row
-    .col-sm-8.js-noteable-awards
+    .col-sm-6.col-md-8.js-noteable-awards
       = render 'award_emoji/awards_block', awardable: @epic, inline: true
+    .col-sm-6.col-md-4.d-flex.justify-content-sm-end.align-items-md-top.mt-2.mt-sm-1
+      #js-vue-discussion-filter{ data: { default_filter: current_user&.notes_filter_for(@epic), notes_filters: UserPreference.notes_filters.to_json } }
 
 %section.issuable-discussion
   = render 'discussion'

ee/changelogs/unreleased/issue_7526.yml

+---
+title: Allow to filter notes in epics
+merge_request: 8978
+author:
+type: added

ee/db/migrate/20181228140935_add_epic_notes_filter_to_user_preference.rb

+class AddEpicNotesFilterToUserPreference < ActiveRecord::Migration[5.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  class UserPreference < ActiveRecord::Base
+    self.table_name = 'user_preferences'
+
+    NOTES_FILTERS = { all_notes: 0, comments: 1 }.freeze
+  end
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default :user_preferences,
+                            :epic_notes_filter,
+                            :integer,
+                            default: UserPreference::NOTES_FILTERS[:all_notes],
+                            allow_null: false,
+                            limit: 2
+  end
+
+  def down
+    remove_column(:user_preferences, :epic_notes_filter)
+  end
+end

ee/spec/controllers/groups/epics_controller_spec.rb

@@ -166,10 +166,13 @@ describe Groups::EpicsController do
       before do
         sign_in(user)
         group.add_developer(user)
-        SystemNoteService.epic_issue(epic, issue, user, :added)
       end
 
       context 'when issue note is returned' do
+        before do
+          SystemNoteService.epic_issue(epic, issue, user, :added)
+        end
+
         shared_examples 'issue link presence' do
           let(:issue) { create(:issue, project: project, description: "Project Issue") }
 
@@ -197,6 +200,15 @@ describe Groups::EpicsController do
           end
         end
       end
+
+      context 'setting notes filter' do
+        let(:issuable) { epic }
+        let(:issuable_parent) { group }
+        let!(:discussion_note) { create(:note, :system, noteable: issuable) }
+        let!(:discussion_comment) { create(:note, noteable: issuable) }
+
+        it_behaves_like 'issuable notes filter'
+      end
     end
 
     describe 'GET #show' do

spec/controllers/projects/issues_controller_spec.rb

@@ -1118,6 +1118,7 @@ describe Projects::IssuesController do
 
       context 'when user is setting notes filters' do
         let(:issuable) { issue }
+        let(:issuable_parent) { project }
         let!(:discussion_note) { create(:discussion_note_on_issue, :system, noteable: issuable, project: project) }
 
         it_behaves_like 'issuable notes filter'

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -78,6 +78,7 @@ describe Projects::MergeRequestsController do
 
     context 'when user is setting notes filters' do
       let(:issuable) { merge_request }
+      let(:issuable_parent) { project }
       let!(:discussion_note) { create(:discussion_note_on_merge_request, :system, noteable: issuable, project: project) }
       let!(:discussion_comment) { create(:discussion_note_on_merge_request, noteable: issuable, project: project) }
 

spec/support/shared_examples/controllers/issuable_notes_filter_shared_examples.rb

 shared_examples 'issuable notes filter' do
+  let(:params) do
+    if issuable_parent.is_a?(Project)
+      { namespace_id: issuable_parent.namespace, project_id: issuable_parent, id: issuable.iid }
+    else
+      { group_id: issuable_parent, id: issuable.to_param }
+    end
+  end
+
   it 'sets discussion filter' do
     notes_filter = UserPreference::NOTES_FILTERS[:only_comments]
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid, notes_filter: notes_filter }
+    get :discussions, params: params.merge(notes_filter: notes_filter)
 
     expect(user.reload.notes_filter_for(issuable)).to eq(notes_filter)
     expect(UserPreference.count).to eq(1)
@@ -13,7 +21,7 @@ shared_examples 'issuable notes filter' do
 
     expect_any_instance_of(issuable.class).to receive(:expire_note_etag_cache)
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid, notes_filter: notes_filter }
+    get :discussions, params: params.merge(notes_filter: notes_filter)
   end
 
   it 'does not expires notes e-tag cache for issuable if filter did not change' do
@@ -22,14 +30,14 @@ shared_examples 'issuable notes filter' do
 
     expect_any_instance_of(issuable.class).not_to receive(:expire_note_etag_cache)
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid, notes_filter: notes_filter }
+    get :discussions, params: params.merge(notes_filter: notes_filter)
   end
 
   it 'does not set notes filter when database is in read only mode' do
     allow(Gitlab::Database).to receive(:read_only?).and_return(true)
     notes_filter = UserPreference::NOTES_FILTERS[:only_comments]
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid, notes_filter: notes_filter }
+    get :discussions, params: params.merge(notes_filter: notes_filter)
 
     expect(user.reload.notes_filter_for(issuable)).to eq(0)
   end
@@ -37,7 +45,7 @@ shared_examples 'issuable notes filter' do
   it 'returns only user comments' do
     user.set_notes_filter(UserPreference::NOTES_FILTERS[:only_comments], issuable)
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid }
+    get :discussions, params: params
     discussions = JSON.parse(response.body)
 
     expect(discussions.count).to eq(1)
@@ -47,7 +55,7 @@ shared_examples 'issuable notes filter' do
   it 'returns only activity notes' do
     user.set_notes_filter(UserPreference::NOTES_FILTERS[:only_activity], issuable)
 
-    get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid }
+    get :discussions, params: params
     discussions = JSON.parse(response.body)
 
     expect(discussions.count).to eq(1)
@@ -60,7 +68,7 @@ shared_examples 'issuable notes filter' do
 
       expect(ResourceEvents::MergeIntoNotesService).not_to receive(:new)
 
-      get :discussions, params: { namespace_id: project.namespace, project_id: project, id: issuable.iid }
+      get :discussions, params: params
     end
   end
 end