Statistics on top of Events#index

app/controllers/admin/events_controller.rb

@@ -21,6 +21,9 @@ module Admin
       @difficulty_levels = @program.difficulty_levels
       @machine_states = @events.state_machine.states.map
       @event_types = @program.event_types
+      @tracks_distribution_confirmed = @conference.tracks_distribution(:confirmed)
+      @event_distribution = @conference.event_distribution
+      @scheduled_event_distribution = @conference.scheduled_event_distribution
 
       @mystates = []
       @mytypes = []

app/models/conference.rb

@@ -316,6 +316,20 @@ class Conference < ActiveRecord::Base
     Conference.calculate_event_distribution_hash(program.events.select(:state).group(:state).count)
   end
 
+  ##
+  # Returns a hash with scheduled vs unscheduled events
+  # { "Scheduled" => { value: number of confirmed and scheduled events, color: color },
+  #   "Unscheduled" => { value: number of confirmed and unscheduled events, color: color }
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def scheduled_event_distribution
+    confirmed_events = program.events.where(state: 'confirmed')
+    scheduled_value =  { 'value' => confirmed_events.where('start_time IS NOT NULL').count, 'color' => 'green' }
+    unscheduled_value =  { 'value' => confirmed_events.where('start_time IS NULL').count, 'color' => 'red' }
+    { 'Scheduled' => scheduled_value, 'Unscheduled' => unscheduled_value }
+  end
+
   ##
   # Returns a hash with user distribution => {value: count of user state, color: color}
   # active: signed in during the last 3 months

app/views/admin/events/index.html.haml

@@ -8,6 +8,13 @@
       %p.text-muted
         All the submissions of your speakers
 .row
+  .col-md-4
+    = render partial: 'admin/conference/doughnut_chart', locals: {title: 'Events state', data: @event_distribution}
+  .col-md-4
+    = render partial: 'admin/conference/doughnut_chart', locals: {title: 'Confirmed events scheduled', data: @scheduled_event_distribution}
+  .col-md-4
+    = render partial: 'admin/conference/doughnut_chart', locals: {title: 'Tracks of confirmed events', data: @tracks_distribution_confirmed}
+.row{ style: "margin-top: 40px;"}
   .col-md-12
     %table.table.table-striped.table-bordered.table-hover.datatable
       %thead