Add conversation presenter

app/presenters/conversation_presenter.rb

@@ -0,0 +1,17 @@
+class ConversationPresenter < BasePresenter
+  def initialize(conversation)
+    @conversation = conversation
+  end
+
+  def as_json
+    {
+      id:           @conversation.id,
+      guid:         @conversation.guid,
+      created_at:   @conversation.created_at,
+      subject:      @conversation.subject,
+      messages:     @conversation.messages.map {|x| x.as_json["message"] },
+      author:       @conversation.author,
+      participants: @conversation.participants
+    }
+  end
+end

spec/presenters/conversation_presenter.rb

@@ -0,0 +1,12 @@
+describe ConversationPresenter do
+  before do
+    @conversation = FactoryGirl.create(:conversation)
+    @presenter = ConversationPresenter.new(@conversation)
+  end
+
+  describe "#as_json" do
+    it "works" do
+      expect(@presenter.as_json).to be_a Hash
+    end
+  end
+end