Create PullRequest object when payload is recieved

.rspec

@@ -1,3 +1,2 @@
 --color
---warnings
 --require spec_helper

app/controllers/github_payloads_controller.rb

@@ -0,0 +1,23 @@
+class GithubPayloadsController < ApplicationController
+  def create
+    if pr_is_new?
+      PullRequest.create(pr_params)
+    end
+
+    render nothing: true
+  end
+
+  private
+
+  def pr_is_new?
+    parser.action == "opened"
+  end
+
+  def parser
+    @_parser ||= PayloadParser.new(params[:payload])
+  end
+
+  def pr_params
+    parser.params
+  end
+end

app/models/pull_request.rb

@@ -0,0 +1,6 @@
+class PullRequest < ActiveRecord::Base
+  validates :github_issue_id, presence: true
+  validates :github_url, presence: true
+  validates :repo_name, presence: true
+  validates :status, presence: true
+end

app/services/payload_parser.rb

@@ -0,0 +1,35 @@
+class PayloadParser
+  def initialize(payload)
+    @payload = payload
+  end
+
+  def action
+    payload["action"]
+  end
+
+  def params
+    {
+      github_issue_id: github_issue_id,
+      github_url: github_url,
+      repo_name: repo_name,
+    }
+  end
+
+  private
+
+  def github_issue_id
+    payload["pull_request"]["id"]
+  end
+
+  def github_url
+    payload["pull_request"]["html_url"]
+  end
+
+  def repo_name
+    payload["pull_request"]["head"]["repo"]["full_name"]
+  end
+
+  def payload
+    @_payload ||= JSON.parse(@payload)
+  end
+end

config/routes.rb

@@ -1,3 +1,4 @@
 Rails.application.routes.draw do
+  resources :github_payloads, only: [:create]
   root to: "pull_requests#index"
 end

db/migrate/20141211190456_create_pull_requests.rb

@@ -0,0 +1,12 @@
+class CreatePullRequests < ActiveRecord::Migration
+  def change
+    create_table :pull_requests do |t|
+      t.timestamps null: false
+
+      t.integer :github_issue_id, null: false
+      t.string :github_url, null: false
+      t.string :repo_name, null: false
+      t.string :status, null: false, default: 'needs review', index: true
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20141211175300) do
+ActiveRecord::Schema.define(version: 20141211190456) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -32,4 +32,15 @@
 
   add_index "delayed_jobs", ["priority", "run_at"], name: "delayed_jobs_priority", using: :btree
 
+  create_table "pull_requests", force: true do |t|
+    t.datetime "created_at",                               null: false
+    t.datetime "updated_at",                               null: false
+    t.integer  "github_issue_id",                          null: false
+    t.string   "github_url",                               null: false
+    t.string   "repo_name",                                null: false
+    t.string   "status",          default: "needs review", null: false
+  end
+
+  add_index "pull_requests", ["status"], name: "index_pull_requests_on_status", using: :btree
+
 end

spec/controllers/github_payloads_controller_spec.rb

@@ -0,0 +1,27 @@
+require "rails_helper"
+
+describe GithubPayloadsController do
+  context "POST#create" do
+    describe "when the action is 'opened'" do
+      it "creates a new PullRequest" do
+        send_pull_request_payload(action: "opened")
+        expect(last_pull_request.status).to eq("needs review")
+      end
+    end
+
+    describe "when the action is not 'opened'" do
+      it "does not create a pull request" do
+        send_pull_request_payload(action: "merged")
+        expect(last_pull_request).to be_nil
+      end
+    end
+  end
+
+  def send_pull_request_payload(action:)
+    post :create, payload: pull_request_payload(action: action)
+  end
+
+  def last_pull_request
+    PullRequest.last
+  end
+end

spec/models/pull_request_spec.rb

@@ -0,0 +1,8 @@
+require "rails_helper"
+
+describe PullRequest do
+  it { should validate_presence_of(:github_issue_id) }
+  it { should validate_presence_of(:github_url) }
+  it { should validate_presence_of(:repo_name) }
+  it { should validate_presence_of(:status) }
+end