Create metadata when creating system notes

app/models/note.rb

@@ -37,7 +37,7 @@ class Note < ActiveRecord::Base
 
   has_many :todos, dependent: :destroy
   has_many :events, as: :target, dependent: :destroy
-  has_one :system_note_metadata, dependent: :destroy
+  has_one :system_note_metadata
 
   delegate :gfm_reference, :local_reference, to: :noteable
   delegate :name, to: :project, prefix: true

app/models/system_note_metadata.rb

@@ -5,7 +5,7 @@ class SystemNoteMetadata < ActiveRecord::Base
   ].freeze
 
   validates :note, presence: true
-  validates :icon, inclusion: ICON_TYPES, allow_nil: true
+  validates :action, inclusion: ICON_TYPES, allow_nil: true
 
   belongs_to :note
 end

app/services/note_summary.rb

+class NoteSummary
+  attr_reader :note
+  attr_reader :metadata
+
+  def initialize(noteable, project, author, body, action: nil, commit_count: nil)
+    @note = { noteable: noteable, project: project, author: author, note: body }
+    @metadata = { action: action, commit_count: commit_count }.compact
+
+    set_commit_params if note[:noteable].is_a?(Commit)
+  end
+
+  def metadata?
+    metadata.present?
+  end
+
+  def set_commit_params
+    note.merge!(noteable_type: 'Commit', commit_id: note[:noteable].id)
+    note[:noteable] = nil
+  end
+end

app/services/system_note_service.rb

@@ -26,7 +26,7 @@ module SystemNoteService
     body << new_commit_summary(new_commits).join("\n")
     body << "\n\n[Compare with previous version](#{diff_comparison_url(noteable, project, oldrev)})"
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'commit', commit_count: total_count))
   end
 
   # Called when the assignee of a Noteable is changed or removed
@@ -46,7 +46,7 @@ module SystemNoteService
   def change_assignee(noteable, project, author, assignee)
     body = assignee.nil? ? 'removed assignee' : "assigned to #{assignee.to_reference}"
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'assignee'))
   end
 
   # Called when one or more labels on a Noteable are added and/or removed
@@ -86,7 +86,7 @@ module SystemNoteService
 
     body << ' ' << 'label'.pluralize(labels_count)
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'label'))
   end
 
   # Called when the milestone of a Noteable is changed
@@ -106,7 +106,7 @@ module SystemNoteService
   def change_milestone(noteable, project, author, milestone)
     body = milestone.nil? ? 'removed milestone' : "changed milestone to #{milestone.to_reference(project)}"
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'milestone'))
   end
 
   # Called when the estimated time of a Noteable is changed
@@ -132,7 +132,7 @@ module SystemNoteService
              "changed time estimate to #{parsed_time}"
            end
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'time_tracking'))
   end
 
   # Called when the spent time of a Noteable is changed
@@ -161,7 +161,7 @@ module SystemNoteService
       body = "#{action} #{parsed_time} of time spent"
     end
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'time_tracking'))
   end
 
   # Called when the status of a Noteable is changed
@@ -183,53 +183,57 @@ module SystemNoteService
     body = status.dup
     body << " via #{source.gfm_reference(project)}" if source
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'status'))
   end
 
   # Called when 'merge when pipeline succeeds' is executed
   def merge_when_pipeline_succeeds(noteable, project, author, last_commit)
     body = "enabled an automatic merge when the pipeline for #{last_commit.to_reference(project)} succeeds"
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'merge'))
   end
 
   # Called when 'merge when pipeline succeeds' is canceled
   def cancel_merge_when_pipeline_succeeds(noteable, project, author)
     body = 'canceled the automatic merge'
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'merge'))
   end
 
   def remove_merge_request_wip(noteable, project, author)
     body = 'unmarked as a **Work In Progress**'
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'title'))
   end
 
   def add_merge_request_wip(noteable, project, author)
     body = 'marked as a **Work In Progress**'
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'title'))
   end
 
   def add_merge_request_wip_from_commit(noteable, project, author, commit)
     body = "marked as a **Work In Progress** from #{commit.to_reference(project)}"
 
-    create_note(noteable: noteable, project: project, author: author, note: body)
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'title'))
   end
 
   def self.resolve_all_discussions(merge_request, project, author)
     body = "resolved all discussions"
 
-    create_note(noteable: merge_request, project: project, author: author, note: body)
+    create_note(NoteSummary.new(merge_request, project, author, body, action: 'discussion'))
   end
 
   def discussion_continued_in_issue(discussion, project, author, issue)
     body = "created #{issue.to_reference} to continue this discussion"
-    note_attributes = discussion.reply_attributes.merge(project: project, author: author, note: body)
-    note_attributes[:type] = note_attributes.delete(:note_type)
 
-    create_note(note_attributes)
+    note_params = discussion.reply_attributes.merge(project: project, author: author, note: body)
+    note_params[:type] = note_params.delete(:note_type)
+
+    note = Note.create(note_params.merge(system: true))
+    note.system_note_metadata = SystemNoteMetadata.new({ action: 'discussion' })
+
+    note
   end
 
   # Called when the title of a Noteable is changed
@@ -253,7 +257,8 @@ module SystemNoteService
     marked_new_title = Gitlab::Diff::InlineDiffMarker.new(new_title).mark(new_diffs, mode: :addition, markdown: true)
 
     body = "changed title from **#{marked_old_title}** to **#{marked_new_title}**"
-    create_note(noteable: noteable, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'title'))
   end
 
   # Called when the confidentiality changes
@@ -269,7 +274,8 @@ module SystemNoteService
   # Returns the created Note object
   def change_issue_confidentiality(issue, project, author)
     body = issue.confidential ? 'made the issue confidential' : 'made the issue visible to everyone'
-    create_note(noteable: issue, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(issue, project, author, body, action: 'confidentiality'))
   end
 
   # Called when a branch in Noteable is changed
@@ -288,7 +294,8 @@ module SystemNoteService
   # Returns the created Note object
   def change_branch(noteable, project, author, branch_type, old_branch, new_branch)
     body = "changed #{branch_type} branch from `#{old_branch}` to `#{new_branch}`"
-    create_note(noteable: noteable, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'branch'))
   end
 
   # Called when a branch in Noteable is added or deleted
@@ -314,7 +321,8 @@ module SystemNoteService
       end
 
     body = "#{verb} #{branch_type} branch `#{branch}`"
-    create_note(noteable: noteable, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'branch'))
   end
 
   # Called when a branch is created from the 'new branch' button on a issue
@@ -325,7 +333,8 @@ module SystemNoteService
     link = url_helpers.namespace_project_compare_url(project.namespace, project, from: project.default_branch, to: branch)
 
     body = "created branch [`#{branch}`](#{link})"
-    create_note(noteable: issue, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(issue, project, author, body, action: 'branch'))
   end
 
   # Called when a Mentionable references a Noteable
@@ -349,23 +358,12 @@ module SystemNoteService
     return if cross_reference_disallowed?(noteable, mentioner)
 
     gfm_reference = mentioner.gfm_reference(noteable.project)
-
-    note_options = {
-      project: noteable.project,
-      author:  author,
-      note:    cross_reference_note_content(gfm_reference)
-    }
-
-    if noteable.is_a?(Commit)
-      note_options.merge!(noteable_type: 'Commit', commit_id: noteable.id)
-    else
-      note_options[:noteable] = noteable
-    end
+    body = cross_reference_note_content(gfm_reference)
 
     if noteable.is_a?(ExternalIssue)
       noteable.project.issues_tracker.create_cross_reference_note(noteable, mentioner, author)
     else
-      create_note(note_options)
+      create_note(NoteSummary.new(noteable, noteable.project, author, body, action: 'cross_reference'))
     end
   end
 
@@ -444,7 +442,8 @@ module SystemNoteService
   def change_task_status(noteable, project, author, new_task)
     status_label = new_task.complete? ? Taskable::COMPLETED : Taskable::INCOMPLETE
     body = "marked the task **#{new_task.source}** as #{status_label}"
-    create_note(noteable: noteable, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'task'))
   end
 
   # Called when noteable has been moved to another project
@@ -466,7 +465,8 @@ module SystemNoteService
 
     cross_reference = noteable_ref.to_reference(project)
     body = "moved #{direction} #{cross_reference}"
-    create_note(noteable: noteable, project: project, author: author, note: body)
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'moved'))
   end
 
   private
@@ -482,8 +482,11 @@ module SystemNoteService
     end
   end
 
-  def create_note(args = {})
-    Note.create(args.merge(system: true))
+  def create_note(note_summary)
+    note = Note.create(note_summary.note.merge(system: true))
+    note.system_note_metadata = SystemNoteMetadata.new(note_summary.metadata) if note_summary.metadata?
+
+    note
   end
 
   def cross_reference_note_prefix

changelogs/unreleased/24784-system-notes-meta-data.yml

+---
+title: Add metadata to system notes
+merge_request: 9964
+author:

db/migrate/20170314082049_create_system_note_metadata.rb

@@ -5,15 +5,19 @@ class CreateSystemNoteMetadata < ActiveRecord::Migration
 
   disable_ddl_transaction!
 
-  def change
+  def up
     create_table :system_note_metadata do |t|
       t.references :note, null: false
       t.integer :commit_count
-      t.string :icon
+      t.string :action
 
       t.timestamps null: false
     end
 
-    add_concurrent_foreign_key :system_note_metadata, :notes, column: :note_id, on_delete: :cascade
+    add_concurrent_foreign_key :system_note_metadata, :notes, column: :note_id
+  end
+
+  def down
+    drop_table :system_note_metadata
   end
 end

db/schema.rb

@@ -1078,7 +1078,7 @@ ActiveRecord::Schema.define(version: 20170317203554) do
   create_table "system_note_metadata", force: :cascade do |t|
     t.integer "note_id", null: false
     t.integer "commit_count"
-    t.string "icon"
+    t.string "action"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
   end

spec/factories/system_note_metadata.rb

 FactoryGirl.define do
   factory :system_note_metadata do
     note
-    icon 'merge'
+    action 'merge'
   end
 end

spec/lib/gitlab/import_export/all_models.yml

@@ -29,6 +29,7 @@ notes:
 - resolved_by
 - todos
 - events
+- system_note_metadata
 label_links:
 - target
 - label

spec/models/note_spec.rb

@@ -9,7 +9,6 @@ describe Note, models: true do
     it { is_expected.to belong_to(:author).class_name('User') }
 
     it { is_expected.to have_many(:todos).dependent(:destroy) }
-    it { is_expected.to have_one(:system_note_metadata).dependent(:destroy) }
   end
 
   describe 'modules' do

spec/models/system_note_metadata_spec.rb

@@ -8,17 +8,17 @@ describe SystemNoteMetadata, models: true do
   describe 'validation' do
     it { is_expected.to validate_presence_of(:note) }
 
-    context 'when icon type is invalid' do
+    context 'when action type is invalid' do
       subject do
-        build(:system_note_metadata, note: build(:note), icon: 'invalid_type' )
+        build(:system_note_metadata, note: build(:note), action: 'invalid_type' )
       end
 
       it { is_expected.to be_invalid }
     end
 
-    context 'when icon type is valid' do
+    context 'when action type is valid' do
       subject do
-        build(:system_note_metadata, note: build(:note), icon: 'merge' )
+        build(:system_note_metadata, note: build(:note), action: 'merge' )
       end
 
       it { is_expected.to be_valid }

spec/services/note_summary_spec.rb

+require 'spec_helper'
+
+describe NoteSummary, services: true do
+  let(:project)  { build(:empty_project) }
+  let(:noteable) { build(:issue) }
+  let(:user)     { build(:user) }
+
+  def create_note_summary
+    described_class.new(noteable, project, user, 'note', action: 'icon', commit_count: 5)
+  end
+
+  describe '#metadata?' do
+    it 'returns true when metadata present' do
+      expect(create_note_summary.metadata?).to be_truthy
+    end
+
+    it 'returns false when metadata not present' do
+      expect(described_class.new(noteable, project, user, 'note').metadata?).to be_falsey
+    end
+  end
+
+  describe '#note' do
+    it 'returns note hash' do
+      expect(create_note_summary.note).to eq(noteable: noteable, project: project, author: user, note: 'note')
+    end
+
+    context 'when noteable is a commit' do
+      let(:noteable) { build(:commit) }
+
+      it 'returns note hash specific to commit' do
+        expect(create_note_summary.note).to eq(
+          noteable: nil, project: project, author: user, note: 'note',
+          noteable_type: 'Commit', commit_id: noteable.id
+        )
+      end
+    end
+  end
+
+  describe '#metadata' do
+    it 'returns metadata hash' do
+      expect(create_note_summary.metadata).to eq(action: 'icon', commit_count: 5)
+    end
+  end
+end