Implements user and event state distribution

app/assets/javascripts/dashboard.js

@@ -11,7 +11,14 @@ $(function() {
                     "width":$(el).parent().width(),
                     "height":$(el).parent().outerHeight()
                 });
-                redraw(animate, $(this));
+            });
+
+            $(".line_chart").each(function(){
+                draw_line_chart(animate, $(this));
+            });
+
+            $(".doughnut_chart").each(function(){
+                draw_doughnut_chart(animate, $(this));
             });
 
             var m = 0;
@@ -21,13 +28,37 @@ $(function() {
         }, 30);
     }
 
-    function redraw(animation, $this){
-        var options = {};
+    function draw_doughnut_chart(animation, $this){
+        var options = get_animation({}, animation);
+        var tmp = $this.data('chart');
+
+        if(jQuery.isEmptyObject(tmp)){
+            // Append error message if there is no data
+            $this.parent().append("<h4 class=\"text-warning\">No data!</h4>");
+            // Remove canvas
+            $this.remove();
+        }else{
+            var data = [];
+            for (var key in tmp) {
+                data.push(tmp[key]);
+            }
+
+            var ctx = $this.get(0).getContext("2d");
+            new Chart(ctx).Doughnut(data, options);
+        }
+    }
+
+    function get_animation(options, animation){
         if (!animation){
             options.animation = false;
         } else {
             options.animation = true;
         }
+        return options;
+    }
+
+    function draw_line_chart(animation, $this){
+        var options = get_animation({}, animation);
 
         var chart_data = create_dataset($this);
         var weeks = $this.parent().data('weeks');
@@ -36,8 +67,7 @@ $(function() {
             datasets : chart_data
         }
 
-        var canvas = $this[0];
-        var ctx = canvas.getContext("2d");
+        var ctx = $this.get(0).getContext("2d");
         new Chart(ctx).Line(data, options);
     }
 
@@ -74,7 +104,7 @@ $(function() {
     $('.conferenceCheckboxes input').change(function(){
         var chart = $(this).parent().data('chart');
         var $canvas = $('#' + chart + 'Chart');
-        redraw(false, $canvas);
+        draw_line_chart(false, $canvas);
     });
 
     $(window).on('resize', function(){ size(false); });

app/controllers/admin/conference_controller.rb

@@ -2,6 +2,12 @@ class Admin::ConferenceController < ApplicationController
   before_filter :verify_organizer
 
   def index
+    # Redirect to new form if there is no conference
+    if Conference.count == 0
+      redirect_to new_admin_conference_path
+      return
+    end
+
     @total_user = User.count
     @new_user = User.where('created_at > ?', current_user.last_sign_in_at).count
 
@@ -44,11 +50,8 @@ class Admin::ConferenceController < ApplicationController
     @registrations = normalize_array_length(@registrations, @registration_weeks)
     @registration_weeks = @registration_weeks > 0 ? (1..@registration_weeks).to_a : 1
 
-    # Redirect to new form if there is no conference
-    if Conference.count == 0
-      redirect_to new_admin_conference_path
-      return
-    end
+    @event_distribution = Conference.event_distribution
+    @user_distribution = Conference.user_distribution
   end
 
   def new
@@ -85,6 +88,8 @@ class Admin::ConferenceController < ApplicationController
     @conference = Conference.find_by(short_title: params[:id])
     @conference_progress = @conference.get_status
     @top_submitter = @conference.get_top_submitter
+    @event_distribution = @conference.event_distribution
+
     respond_to do |format|
       format.html
       format.json { render json: @conference.to_json }

app/models/conference.rb

@@ -278,8 +278,88 @@ class Conference < ActiveRecord::Base
     Conference.calculate_person_submission_hash(submitter, counter)
   end
 
+  ##
+  # Returns a hash with event state => {value: count of event states, color: color}.
+  # The result is calculated over all conferences.
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def self.event_distribution
+    calculate_event_distribution_hash(Event.group(:state).count)
+  end
+
+  ##
+  # Returns a hash with event state => {value: count of event states, color: color}
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def event_distribution
+    Conference.calculate_event_distribution_hash(events.group(:state).count)
+  end
+
+  ##
+  # Returns a hash with user distribution => {value: count of user state, color: color}
+  # active: signed in during the last 3 months
+  # unconfirmed: registered but not confirmed
+  # dead: not signed in during the last year
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def self.user_distribution
+    active_user = User.where('last_sign_in_at > ?', Date.today - 3.months).count
+    unconfirmed_user = User.where('confirmed_at IS NULL').count
+    dead_user = User.where('last_sign_in_at < ?', Date.today - 1.year).count
+
+    calculate_user_distribution_hash(active_user, unconfirmed_user, dead_user)
+  end
+
   private
 
+  ##
+  # Helper method for calculating hash with corresponding colors of user distribution states.
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def self.calculate_user_distribution_hash(active_user, unconfirmed_user, dead_user)
+    result = {}
+    if active_user > 0
+      result['Active'] = {
+        'color' => 'green',
+        'value' => active_user
+      }
+    end
+    if unconfirmed_user > 0
+      result['Unconfirmed'] = {
+        'color' => 'red',
+        'value' => unconfirmed_user
+      }
+    end
+    if dead_user > 0
+      result['Dead'] = {
+        'color' => 'black',
+        'value' => dead_user
+      }
+    end
+    result
+  end
+
+  ##
+  # Helper method. Calculates hash with corresponding colors of event state distribution.
+  #
+  # ====Returns
+  # * +hash+ -> hash
+  def self.calculate_event_distribution_hash(states)
+    result = {}
+    states.each do |key, value|
+      result[key.capitalize] =
+          {
+            'value' => value,
+            'color' => Event.get_state_color(key)
+          }
+    end
+    result
+  end
+
   ##
   # Returns a hash with person => submissions ordered by submissions for all conferences
   #

app/models/event.rb

@@ -154,6 +154,26 @@ class Event < ActiveRecord::Base
     created_at.strftime('%W').to_i
   end
 
+  def self.get_state_color(state)
+    # default azure
+    result = '#00FFFF'
+    case state
+    when 'new' # blue
+      result = '#0000FF'
+    when 'withdrawn' # orange
+      result = '#FF8000'
+    when 'confirmed' # green
+      result = '#00FF00'
+    when 'unconfirmed' # yellow
+      result = '#FFFF00'
+    when 'rejected' # red
+      result = '#FF0000'
+    when 'canceled' # grey
+      result = '#848484'
+    end
+    result
+  end
+
   private
 
   def abstract_limit

app/views/admin/conference/_event_distribution.html.haml

@@ -0,0 +1,8 @@
+.well
+  .text-center
+    %h4 Event distribution
+    %canvas.doughnut_chart{"data-chart"=>@event_distribution.to_json}
+  .row
+    - if @event_distribution
+      - @event_distribution.each do |key, value|
+        %span{"style"=>"border-bottom: 3px solid #{value['color']}"} #{key}: #{value['value']}

app/views/admin/conference/_registrations.html.haml

@@ -4,7 +4,7 @@
       %h4 Conference registrations over time
   .row
     .registrationsChart{"data-chart"=>"#{registrations.to_json}", "data-conferences"=>"#{conferences.to_json}", "data-weeks"=>"#{registration_weeks.to_json}"}
-      %canvas#registrationsChart{"data-name"=>"registrations"}
+      %canvas.line_chart#registrationsChart{"data-name"=>"registrations"}
   .row
     .text-center
       weeks

app/views/admin/conference/_submissions.html.haml

@@ -4,7 +4,7 @@
       %h4 Event submissions over time
   .row
     .submissionsChart{"data-chart"=>"#{submissions.to_json}", "data-conferences"=>"#{conferences.to_json}", "data-weeks"=>"#{cfp_weeks.to_json}"}
-      %canvas#submissionsChart{"data-name"=>"submissions"}
+      %canvas.line_chart#submissionsChart{"data-name"=>"submissions"}
   .row
     .text-center
       weeks

app/views/admin/conference/_user_distribution.html.haml

@@ -0,0 +1,8 @@
+.well
+  .text-center
+    %h4 User distribution
+    %canvas.doughnut_chart{"data-chart"=>user_distribution.to_json}
+  .row
+    - if user_distribution
+      - user_distribution.each do |key, value|
+        %span{"style"=>"border-bottom: 3px solid #{value['color']}"} #{key}: #{value['value']}

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

@@ -6,11 +6,13 @@
     = render partial: 'submissions', locals: { conferences: @conferences, submissions: @submissions,
                                            cfp_weeks: @cfp_weeks }
   .col-md-4
+    = render partial: 'event_distribution', locals: { event_distribution: @event_distribution }
 .row
   .col-md-8
     = render partial: 'registrations', locals: { conferences: @conferences, registrations: @registrations,
                                              registration_weeks: @registration_weeks }
   .col-md-4
+    = render partial: 'user_distribution', locals: { user_distribution: @user_distribution }
   .col-md-8
     .row
       %ul.nav.nav-tabs#recentTable

app/views/admin/conference/show.html.haml

@@ -6,4 +6,6 @@
   .col-md-4
     = render partial: 'todo_list', locals: { conference_progress: @conference_progress }
   .col-md-4
-    = render partial: 'top_submitter', locals: {top_submitter: @top_submitter}
+    = render partial: 'top_submitter', locals: {top_submitter: @top_submitter}
+  .col-md-4
+    = render partial: 'event_distribution', locals: { event_distribution: @event_distribution }