Tom Musselman

Gemfile

@@ -36,6 +36,8 @@ gem 'jbuilder', '~> 2.5'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.1.0', require: false
 
+gem 'faraday'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
@@ -54,5 +56,6 @@ group :development do
 end
 
 
+
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Gemfile.lock

@@ -72,6 +72,10 @@ GEM
     diff-lcs (1.4.4)
     erubi (1.10.0)
     execjs (2.8.1)
+    faraday (2.6.0)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.1)
     ffi (1.15.4)
     globalid (0.5.2)
       activesupport (>= 5.0)
@@ -92,9 +96,13 @@ GEM
     matrix (0.4.2)
     method_source (1.0.0)
     mini_mime (1.1.2)
+    mini_portile2 (2.6.1)
     minitest (5.14.4)
     msgpack (1.4.2)
     nio4r (2.5.8)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     nokogiri (1.12.5-arm64-darwin)
       racc (~> 1.4)
     pg (1.2.3)
@@ -153,6 +161,7 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.10.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -199,12 +208,14 @@ GEM
 
 PLATFORMS
   arm64-darwin-20
+  ruby
 
 DEPENDENCIES
   bootsnap (>= 1.1.0)
   byebug
   capybara
   coffee-rails (~> 4.2)
+  faraday
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
   pg (>= 0.18, < 2.0)

app/controllers/items_controller.rb

@@ -0,0 +1,9 @@
+class ItemsController < ApplicationController
+  def index
+    @items = ItemsFacade.get_items
+  end
+
+  def show
+    @item  = ItemsFacade.get_item(params[:id])
+  end
+end

app/controllers/merchants_controller.rb

@@ -0,0 +1,9 @@
+class MerchantsController < ApplicationController
+  def index
+    @merchants = MerchantsFacade.get_merchants
+  end
+
+  def show
+    @merchant = MerchantsFacade.get_merchant(params[:id])
+  end
+end

app/facades/items_facade.rb

@@ -0,0 +1,20 @@
+class ItemsFacade
+  def self.get_merchant_items(merchant_id)
+    items_data = ItemsService.get_merchant_items(merchant_id)[:data]
+    items_data.map do |item_data|
+      Item.new(item_data)
+    end
+  end
+
+  def self.get_item(item_id)
+    item_data = ItemsService.get_item(item_id)[:data]
+    Item.new(item_data)
+  end
+
+  def self.get_items
+    items_data = ItemsSerice.get_items[:data]
+    items_data.map do |item_data|
+      Item.new(item_data)
+    end
+  end
+end

app/facades/merchants_facade.rb

@@ -0,0 +1,13 @@
+class MerchantsFacade
+  def self.get_merchants
+    merchants_data = MerchantsService.get_merchants[:data]
+    merchants_data.map do |merchant_data|
+      Merchant.new(merchant_data)
+    end
+  end
+
+  def self.get_merchant(merchant_id)
+    merchant_data = MerchantsService.get_merchant(merchant_id)[:data]
+    Merchant.new(merchant_data)
+  end
+end

app/poros/item.rb

@@ -0,0 +1,15 @@
+class Item
+  attr_reader :id, :name, :description, :unit_price
+
+  def initialize(item_data)
+    @id = item_data[:id].to_i
+    @name = item_data[:attributes][:name]
+    @description = item_data[:attributes][:description]
+    @unit_price = item_data[:attributes][:unit_price]
+    @merchant_id = item_data[:attributes][:merchant_id]
+  end
+
+  def merchant
+    MerchantsFacade.get_merchant(@merchant_id)
+  end
+end

app/poros/merchant.rb

@@ -0,0 +1,12 @@
+class Merchant
+  attr_reader :id, :name, :items
+
+  def initialize(merchant_data)
+    @id = merchant_data[:id].to_i
+    @name = merchant_data[:attributes][:name]
+  end
+
+  def items
+    ItemsFacade.get_merchant_items(@id)
+  end
+end

app/services/items_service.rb

@@ -0,0 +1,22 @@
+class ItemsService
+  def self.get_merchant_items(merchant_id)
+    response = conn.get("/api/v1/merchants/#{merchant_id}/items")
+    JSON.parse(response.body, symbolize_names: true)
+  end
+
+  def self.get_items
+    response = conn.get("/api/v1/items")
+    JSON.parse(response.body, symbolize_names: true)
+  end
+
+  def self.get_item(item_id)
+    response = conn.get("/api/v1/items/#{item_id}")
+    JSON.parse(response.body, symbolize_names: true)
+  end
+
+  private
+
+  def self.conn
+    Faraday.new(url: "http://localhost:3000")
+  end
+end

app/services/merchants_service.rb

@@ -0,0 +1,18 @@
+class MerchantsService
+
+  def self.get_merchants
+    response = conn.get("/api/v1/merchants")
+    JSON.parse(response.body, symbolize_names: true)
+  end
+
+  def self.get_merchant(merchant_id)
+    response = conn.get("/api/v1/merchants/#{merchant_id}")
+    JSON.parse(response.body, symbolize_names: true)
+  end
+
+  private
+
+  def self.conn
+    Faraday.new(url: "http://localhost:3000/")
+  end
+end

app/views/merchants/index.html.erb

@@ -0,0 +1,5 @@
+<ul>
+  <% @merchants.each do |merchant| %>
+    <li><%= link_to merchant.name, merchant_path(merchant.id) %></li>
+  <% end %>
+</ul>

app/views/merchants/show.html.erb

@@ -0,0 +1,6 @@
+<h1><%= @merchant.name %></h1>
+<ul>
+  <% @merchant.items.each do |item| %>
+    <li><%= link_to item.name, item_path(item.id) %></li>
+  <% end %>
+</ul>

config/routes.rb

@@ -1,3 +1,5 @@
 Rails.application.routes.draw do
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
+  resources :merchants, only: [:index, :show]
+  resources :items, only: [:index, :show]
 end

db/schema.rb

@@ -0,0 +1,18 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 0) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+end

spec/features/merchants/index_spec.rb

@@ -0,0 +1,28 @@
+require 'rails_helper'
+
+RSpec.describe "merchants index page" do
+
+  before :each do
+    @merchants = MerchantsFacade.get_merchants
+  end
+
+  it 'lists all the merchants' do
+    visit merchants_path
+
+    @merchants.each do |merchant|
+      expect(page).to have_content(merchant.name)
+    end
+  end
+
+  it 'each merchant name is a link to their show page' do
+    visit merchants_path
+
+    @merchants.each do |merchant|
+      expect(page).to have_link(merchant.name)
+    end
+
+    click_link @merchants.first.name
+
+    expect(current_path).to eq(merchant_path(@merchants.first.id))
+  end
+end

spec/features/merchants/show_spec.rb

@@ -0,0 +1,22 @@
+require 'rails_helper'
+
+RSpec.describe "merchants show page" do
+
+  before :each do
+    @merchant = MerchantsFacade.get_merchants.first
+    visit merchant_path(@merchant.id)
+  end
+
+  it 'shows the merchants name' do
+    expect(page).to have_content(@merchant.name)
+  end
+
+  it 'shows the merchant items as links to their show pages' do
+    @merchant.items.each do |item|
+      expect(page).to have_link(item.name)
+    end
+    first_item = @merchant.items.first
+    click_link first_item.name
+    expect(current_path).to eq(item_path(first_item.id))
+  end
+end

spec/fixtures/files/merchants_response.json

@@ -0,0 +1 @@
+{"data":[{"id":"1","type":"merchant","attributes":{"name":"Schroeder-Jerde"}},{"id":"2","type":"merchant","attributes":{"name":"Klein, Rempel and Jones"}},{"id":"3","type":"merchant","attributes":{"name":"Willms and Sons"}},{"id":"4","type":"merchant","attributes":{"name":"Cummings-Thiel"}},{"id":"5","type":"merchant","attributes":{"name":"Williamson Group"}},{"id":"6","type":"merchant","attributes":{"name":"Williamson Group"}},{"id":"7","type":"merchant","attributes":{"name":"Bernhard-Johns"}},{"id":"8","type":"merchant","attributes":{"name":"Osinski, Pollich and Koelpin"}},{"id":"9","type":"merchant","attributes":{"name":"Hand-Spencer"}},{"id":"10","type":"merchant","attributes":{"name":"Bechtelar, Jones and Stokes"}},{"id":"11","type":"merchant","attributes":{"name":"Pollich and Sons"}},{"id":"12","type":"merchant","attributes":{"name":"Kozey Group"}},{"id":"13","type":"merchant","attributes":{"name":"Tillman Group"}},{"id":"14","type":"merchant","attributes":{"name":"Dicki-Bednar"}},{"id":"15","type":"merchant","attributes":{"name":"Adams-Kovacek"}},{"id":"16","type":"merchant","attributes":{"name":"Bosco, Howe and Davis"}},{"id":"17","type":"merchant","attributes":{"name":"Ullrich-Moen"}},{"id":"18","type":"merchant","attributes":{"name":"Koepp LLC"}},{"id":"19","type":"merchant","attributes":{"name":"Brown Inc"}},{"id":"20","type":"merchant","attributes":{"name":"Schulist, Wilkinson and Leannon"}}]}

spec/poros/item_spec.rb

@@ -0,0 +1,7 @@
+require 'rails_helper'
+
+RSpec.describe Item do
+  before :each do
+
+  end
+end

spec/poros/merchant_spec.rb

@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+RSpec.describe Merchant do
+  before :each do 
+    merchants = JSON.parse(file_fixture("merchants_response.json").read, symbolize_names: true)
+    merchant_data = merchants[:data].first
+
+    @merchant = Merchant.new(merchant_data)
+  end
+
+  it 'exists and has attributes' do
+    expect(@merchant).to be_instance_of(Merchant)
+    expect(@merchant.id).to eq(1)
+    expect(@merchant.name).to eq("Schroeder-Jerde")
+  end
+end

spec/services/merchants_service_spec.rb

@@ -0,0 +1,34 @@
+require 'rails_helper'
+
+RSpec.describe MerchantsService do
+  it 'returns a list of the first 20 merchants' do
+    merchants = MerchantsService.get_merchants
+
+    expect(merchants).to be_a(Hash)
+    expect(merchants).to have_key(:data)
+    expect(merchants[:data]).to be_an(Array)
+
+    merchants[:data].each do |merchant|
+      expect(merchant).to have_key(:id)
+      expect(merchant[:type]).to eq("merchant")
+      expect(merchant).to have_key(:attributes)
+      expect(merchant[:attributes]).to have_key(:name)
+      expect(merchant[:attributes][:name]).to be_a(String)
+    end
+  end
+
+  it 'returns a single merchant' do
+    first_merchant_id = MerchantsService.get_merchants[:data].first[:id]
+
+    first_merchant = MerchantsService.get_merchant(first_merchant_id)
+
+    expect(first_merchant).to be_a(Hash)
+    expect(first_merchant).to have_key(:data)
+    expect(first_merchant[:data]).to be_a(Hash)
+    expect(first_merchant[:data][:id]).to eq(first_merchant_id)
+    expect(first_merchant[:data][:type]).to eq("merchant")
+    expect(first_merchant[:data][:attributes]).to be_a(Hash)
+    expect(first_merchant[:data][:attributes]).to have_key(:name)
+    expect(first_merchant[:data][:attributes][:name]).to be_a(String)
+  end
+end