Display some stats

app/controllers/api/api_controller.rb

@@ -0,0 +1,4 @@
+class Api::ApiController < ApplicationController
+  before_action :authenticate_user!
+  protect_from_forgery with: :null_session
+end

app/controllers/api/stats_controller.rb

@@ -0,0 +1,10 @@
+class Api::StatsController < Api::ApiController
+  def show
+    event_type = params[:event]
+    unless event_type.present?
+      return render json: {}, status: :bad_request
+    end
+
+    render json: Ahoy::Event.where(name: event_type).group_by_day(:time).count
+  end
+end

app/controllers/stats_controller.rb

@@ -0,0 +1,5 @@
+class StatsController < ApplicationController
+  def show
+    @event_types = Ahoy::Event.select(:name).uniq.pluck(:name)
+  end
+end

app/views/layouts/application.html.erb

@@ -8,6 +8,7 @@
         <%= stylesheet_link_tag    "application" %>
         <%= javascript_include_tag "vendor/modernizr" %>
         <%= javascript_include_tag "application", 'data-turbolinks-track' => true %>
+        <%= javascript_include_tag "//www.google.com/jsapi", "chartkick" %>
         <%= csrf_meta_tags %>
         <script src="https://www.google.com/recaptcha/api.js?hl=<%= I18n.locale %>"></script>
     </head>

app/views/stats/show.html.erb

@@ -0,0 +1,9 @@
+<h1>Stats</h1>
+
+<h3>Visits</h3>
+<%= line_chart Visit.group_by_day(:started_at).count %>
+
+<% @event_types.each do |event_type| %>
+  <h3><%= event_type.titleize %></h3>
+  <%= line_chart api_stats_path(event: event_type) %>
+<% end %>

config/routes.rb

@@ -21,6 +21,11 @@ Rails.application.routes.draw do
   end
 
   resource :account, controller: "account", only: [:show, :update]
+  resource :stats, only: [:show]
+
+  namespace :api do
+    resource :stats, only: [:show]
+  end
 
   # Example of regular route:
   #   get 'products/:id' => 'catalog#view'

spec/controllers/api/stats_controller_spec.rb

@@ -0,0 +1,44 @@
+require 'rails_helper'
+
+describe Api::StatsController do
+
+  # GET index
+  #----------------------------------------------------------------------
+
+  describe 'GET index' do
+    let(:user) { create :user }
+
+    context 'event not present' do
+      it 'should respond with bad_request' do
+        sign_in user
+        get :show
+        expect(response.status).to eq 400
+      end
+    end
+
+    context 'event present' do
+      it 'should return event counts' do
+        time_1 = DateTime.yesterday.to_datetime
+        time_2 = DateTime.now
+
+        event_1 = create :ahoy_event, name: 'foo', time: time_1
+        event_2 = create :ahoy_event, name: 'foo', time: time_1
+        event_3 = create :ahoy_event, name: 'foo', time: time_2
+        event_4 = create :ahoy_event, name: 'bar'
+
+        sign_in user
+        get :show, event: 'foo'
+
+        expect(response).to be_ok
+
+        data = JSON.parse(response.body)
+        dates = data.keys
+
+        expect(DateTime.parse dates.first).to eq time_1.utc.beginning_of_day
+        expect(DateTime.parse dates.last).to eq time_2.utc.beginning_of_day
+        expect(data[dates.first]).to eq 2
+        expect(data[dates.last]).to eq 1
+      end
+    end
+  end
+end

spec/factories.rb

@@ -31,4 +31,9 @@ FactoryGirl.define do
     debate
   end
 
+  factory :ahoy_event, :class => Ahoy::Event do
+    id { SecureRandom.uuid }
+    time DateTime.now
+    sequence(:name) {|n| "Event #{n} type"}
+  end
 end