Observe issue, merge request, note creation - create event

app/models/activity_observer.rb

+class ActivityObserver < ActiveRecord::Observer
+  observe :issue, :merge_request, :note
+
+  def after_create(record)
+    Event.create(
+      :project => record.project,
+      :target_id => record.id,
+      :target_type => record.class.name,
+      :action => Event.determine_action(record)
+    )
+  end
+end

app/models/event.rb

 class Event < ActiveRecord::Base
+  Created   = 1
+  Updated   = 2
+  Closed    = 3
+  Reopened  = 4
+  Pushed    = 5
+  Commented = 6
+
   belongs_to :project
+  belongs_to :target, :polymorphic => true
+
   serialize :data
+
+  def self.determine_action(record)
+    if [Issue, MergeRequest].include? record.class
+      Event::Created
+    elsif record.kind_of? Note
+      Event::Commented
+    end
+  end
 end
 # == Schema Information
 #
 # Table name: events
 #
 #  id          :integer         not null, primary key
-#  data_type  :string(255)
-#  data_id    :string(255)
+#  target_type :string(255)
+#  target_id   :integer
 #  title       :string(255)
 #  data        :text
 #  project_id  :integer
 #  created_at  :datetime        not null
 #  updated_at  :datetime        not null
+#  action      :integer
 #
+

app/models/project.rb

@@ -3,6 +3,7 @@ require "grit"
 class Project < ActiveRecord::Base
   belongs_to :owner, :class_name => "User"
 
+  has_many :events, :dependent => :destroy
   has_many :merge_requests, :dependent => :destroy
   has_many :issues, :dependent => :destroy, :order => "position"
   has_many :users_projects, :dependent => :destroy

app/models/wiki.rb

@@ -44,3 +44,4 @@ end
 #  slug       :string(255)
 #  user_id    :integer
 #
+

config/application.rb

@@ -23,7 +23,7 @@ module Gitlab
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
     # Activate observers that should always be running.
-    config.active_record.observers = :mailer_observer
+    config.active_record.observers = :mailer_observer, :activity_observer
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.

db/migrate/20120228130210_create_events.rb

 class CreateEvents < ActiveRecord::Migration
   def change
     create_table :events do |t|
-      t.string :data_type, :null => true
-      t.string :data_id, :null => true
+      t.string :target_type, :null => true
+      t.integer :target_id, :null => true
+
       t.string :title, :null => true
       t.text :data, :null => true
       t.integer :project_id, :null => true

db/migrate/20120228134252_add_action_to_event.rb

+class AddActionToEvent < ActiveRecord::Migration
+  def change
+    add_column :events, :action, :integer, :null => true
+  end
+end

db/schema.rb

@@ -11,16 +11,17 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120228130210) do
+ActiveRecord::Schema.define(:version => 20120228134252) do
 
   create_table "events", :force => true do |t|
-    t.string   "data_type"
-    t.string   "data_id"
+    t.string   "target_type"
+    t.integer  "target_id"
     t.string   "title"
     t.text     "data"
     t.integer  "project_id"
     t.datetime "created_at",  :null => false
     t.datetime "updated_at",  :null => false
+    t.integer  "action"
   end
 
   create_table "issues", :force => true do |t|

spec/factories.rb

@@ -32,10 +32,14 @@ end
 
 Factory.add(:issue, Issue) do |obj|
   obj.title = Faker::Lorem.sentence
+  obj.author = Factory :user
+  obj.assignee = Factory :user
 end
 
 Factory.add(:merge_request, MergeRequest) do |obj|
   obj.title = Faker::Lorem.sentence
+  obj.author = Factory :user
+  obj.assignee = Factory :user
   obj.source_branch = "master"
   obj.target_branch = "master"
   obj.closed = false
@@ -64,3 +68,8 @@ Factory.add(:wikis, WebHook) do |obj|
   obj.title = Faker::Lorem.sentence
   obj.content = Faker::Lorem.sentence
 end
+
+Factory.add(:event, Event) do |obj|
+  obj.title = Faker::Lorem.sentence
+  obj.project = Factory(:project)
+end

spec/models/activity_observer_spec.rb

+require 'spec_helper'
+
+describe ActivityObserver do
+  let(:project)  { Factory :project } 
+
+  describe "Merge Request created" do 
+    before do 
+      @merge_request = Factory :merge_request, :project => project
+      @event = Event.last
+    end
+
+    it { @event.should_not be_nil }
+    it { @event.project.should == project }
+    it { @event.action.should == Event::Created }
+    it { @event.target.should == @merge_request }
+  end
+
+  describe "Issue created" do 
+    before do 
+      @issue = Factory :issue, :project => project
+      @event = Event.last
+    end
+
+    it { @event.should_not be_nil }
+    it { @event.project.should == project }
+    it { @event.action.should == Event::Created }
+    it { @event.target.should == @issue }
+  end
+
+  describe "Issue commented" do 
+    before do 
+      @issue = Factory :issue, :project => project
+      @note = Factory :note, :noteable => @issue, :project => project
+      @event = Event.last
+    end
+
+    it { @event.should_not be_nil }
+    it { @event.project.should == project }
+    it { @event.action.should == Event::Commented }
+    it { @event.target.should == @note }
+  end
+end

spec/models/event_spec.rb

@@ -3,17 +3,30 @@
 # Table name: events
 #
 #  id          :integer         not null, primary key
-#  data_type  :string(255)
-#  data_id    :string(255)
+#  target_type :string(255)
+#  target_id   :integer
 #  title       :string(255)
 #  data        :text
 #  project_id  :integer
 #  created_at  :datetime        not null
 #  updated_at  :datetime        not null
+#  action      :integer
 #
 
 require 'spec_helper'
 
 describe Event do
-  pending "add some examples to (or delete) #{__FILE__}"
+  describe "Associations" do
+    it { should belong_to(:project) }
+  end
+
+  describe "Creation" do
+    before do 
+      @event = Factory :event
+    end
+
+    it "should create a valid event" do 
+      @event.should be_valid
+    end
+  end
 end

spec/models/project_spec.rb

@@ -2,6 +2,7 @@ require 'spec_helper'
 
 describe Project do
   describe "Associations" do
+    it { should have_many(:events) }
     it { should have_many(:users) }
     it { should have_many(:users_projects) }
     it { should have_many(:issues) }