Add messages API controller

app/controllers/api/v0/messages_controller.rb

@@ -0,0 +1,26 @@
+module Api
+  module V0
+    class MessagesController < Api::V0::BaseController
+      before_action only: %i(create) do
+        require_access_token %w(read write)
+      end
+
+      rescue_from ActiveRecord::RecordNotFound do
+        render json: {error: I18n.t("conversations.not_found")}, status: 404
+      end
+
+      def create
+        conversation = conversation_service.find!(params[:conversation_id])
+        opts = params.require(:message).permit(:text)
+        message = current_user.build_message(conversation, opts)
+        message.save!
+        Diaspora::Federation::Dispatcher.defer_dispatch(current_user, message)
+        render json: message, status: 201
+      end
+
+      def conversation_service
+        ConversationService.new(current_user)
+      end
+    end
+  end
+end

spec/integration/api/messages_controller_spec.rb

@@ -0,0 +1,65 @@
+require "spec_helper"
+
+describe Api::V0::MessagesController do
+  let(:auth) { FactoryGirl.create(:auth_with_read_and_write) }
+  let!(:access_token) { auth.create_access_token.to_s }
+
+  before do
+    auth.user.seed_aspects
+    auth.user.share_with bob.person, auth.user.aspects[1]
+    auth.user.share_with alice.person, auth.user.aspects[1]
+    alice.share_with auth.user.person, alice.aspects[0]
+
+    @conversation = {
+      author_id:    auth.user.id,
+      subject:      "new conversation",
+      text:         "first message",
+      messages:     [{
+        author: auth.user,
+        text:   "first message"
+      }],
+      recipients:   [alice.person.id],
+      access_token: access_token
+    }
+
+    @message = {
+      text: "reply to first message"
+    }
+  end
+
+  describe "#create " do
+    before do
+      post api_v0_conversations_path, @conversation
+      @conversation_id = JSON.parse(response.body)["conversation"]["id"]
+    end
+
+    context "with valid data" do
+      it "creates the message in the conversation scope" do
+        post(
+          api_v0_conversation_messages_path(@conversation_id),
+          message: @message, access_token: access_token
+        )
+        expect(response.status).to eq 201
+        expect(JSON.parse(response.body)["message"]["id"]).to_not be_nil
+        get(
+          api_v0_conversation_path(@conversation_id),
+          access_token: access_token
+        )
+        response_body = JSON.parse(response.body)["conversation"]
+        expect(response_body["messages"].length).to eq 2
+        text = response_body["messages"][1]["text"]
+        expect(text).to eq "reply to first message"
+      end
+    end
+
+    context "without valid data" do
+      it "returns a wrong parameter error (400)" do
+        post(
+          api_v0_conversation_messages_path(@conversation_id),
+          access_token: access_token
+        )
+        expect(response.status).to eq 400
+      end
+    end
+  end
+end