Send notifiation on create UserProject relation (access granted)

app/mailers/notify.rb

@@ -76,6 +76,13 @@ class Notify < ActionMailer::Base
     mail(to: recipient(recipient_id), subject: subject("changed issue ##{@issue.id}", @issue.title))
   end
+  def project_access_granted_email(user_project_id)
+    @users_project = UsersProject.find user_project_id
+    @project = @users_project.project
+    mail(to: @users_project.user.email, 
+         subject: subject("access to project was granted"))
+  end
+
   private
   # Look up a User by their ID and return their email address

app/observers/users_project_observer.rb

+class UsersProjectObserver < ActiveRecord::Observer
+  def after_create(users_project)
+    Notify.project_access_granted_email(users_project.id).deliver
+  end
+end

app/views/notify/project_access_granted_email.html.haml

+%td.content{align: "left", style: "font-family: Helvetica, Arial, sans-serif; padding: 20px 0 0;", valign: "top", width: "600"}
+  %table{border: "0", cellpadding: "0", cellspacing: "0", style: "color: #717171; font: normal 11px Helvetica, Arial, sans-serif; margin: 0; padding: 0;", width: "600"}
+    %tr
+      %td{style: "font-size: 1px; line-height: 1px;", width: "21"}
+      %td{align: "left", style: "padding: 20px 0 0;"}
+        %h2{style: "color:#646464; font-weight: bold; margin: 0; padding: 0; line-height: 26px; font-size: 18px; font-family: Helvetica, Arial, sans-serif; "}
+          = "You got granted #{@users_project.project_access_human} access to project"
+      %td{style: "font-size: 1px; line-height: 1px;", width: "21"}
+    %tr
+      %td{style: "font-size: 1px; line-height: 1px;", width: "21"}
+      %td{align: "left", style: "padding: 20px 0 0;"}
+        %h2{style: "color:#646464 !important; font-weight: bold; margin: 0; padding: 0; line-height: 26px; font-size: 18px; font-family: Helvetica, Arial, sans-serif; "}
+          = link_to_gfm truncate(@project.name, length: 45), project_url(@project), title: @project.name
+        %br

spec/factories.rb

@@ -90,3 +90,8 @@ Factory.add(:milestone, Milestone) do |obj|
   obj.title = Faker::Lorem.sentence
   obj.due_date = Date.today + 1.month
 end
+
+Factory.add(:users_project, UsersProject) do |obj|
+  obj.user = Factory :user
+  obj.project = Factory :project
+end

spec/mailers/notify_spec.rb

@@ -145,6 +145,26 @@ describe Notify do
       end
     end
+    describe 'project access changed' do
+      let(:project) { Factory.create(:project, 
+                                      path: "Fuu", 
+                                      code: "Fuu") }
+      let(:user) { Factory.create :user }
+      let(:users_project) { Factory.create(:users_project, 
+                                           project: project, 
+                                           user: user) }
+      subject { Notify.project_access_granted_email(users_project.id) }
+      it 'has the correct subject' do
+        should have_subject /access to project was granted/
+      end
+      it 'contains name of project' do
+        should have_body_text /#{project.name}/
+      end
+      it 'contains new user role' do
+        should have_body_text /#{users_project.project_access_human}/
+      end
+    end
+
     context 'items that are noteable, the email for a note' do
       let(:note_author) { Factory.create(:user, name: 'author_name') }
       let(:note) { Factory.create(:note, project: project, author: note_author) }

spec/observers/users_project_observer_spec.rb

+require 'spec_helper'
+
+describe UsersProjectObserver do
+  let(:user) { Factory.create :user }
+  let(:project) { Factory.create(:project, 
+                                 code: "Fuu", 
+                                 path: "Fuu" ) }
+  let(:users_project) { Factory.create(:users_project,
+                                      project: project,
+                                      user: user )}
+  subject { UsersProjectObserver.instance }
+
+  describe "#after_create" do
+    it "should called when UsersProject created" do
+      subject.should_receive(:after_create)
+      UsersProject.observers.enable :users_project_observer do
+        Factory.create(:users_project, 
+                       project: project, 
+                       user: user)
+      end
+    end
+    it "should send email to user" do
+      Notify.should_receive(:project_access_granted_email).with(users_project.id).and_return(double(deliver: true))
+      subject.after_create(users_project)
+    end
+  end
+end