Implement vote results

Gemfile

@@ -54,7 +54,7 @@ gem 'jbuilder'
 
 gem 'search_object'
 
-gem 'her'
+gem 'faraday'
 
 group :development do
   gem 'spring'

Gemfile.lock

@@ -150,11 +150,6 @@ GEM
       guard (~> 2.1)
       guard-compat (~> 1.1)
       rspec (>= 2.99.0, < 4.0)
-    her (0.8.2)
-      activemodel (>= 3.0.0, <= 6.0.0)
-      activesupport (>= 3.0.0, <= 6.0.0)
-      faraday (>= 0.8, < 1.0)
-      multi_json (~> 1.7)
     highline (1.7.8)
     hirb (0.7.3)
     http-cookie (1.0.3)
@@ -404,10 +399,10 @@ DEPENDENCIES
   devise-i18n
   factory_girl_rails
   faker
+  faraday
   font-awesome-sass
   globalize
   guard-rspec
-  her
   hirb
   i18n-tasks
   jbuilder

app/assets/stylesheets/management/_dashboard.scss

@@ -1,3 +1,7 @@
 .huge {
     font-size: 40px;
 }
+
+.large {
+    font-size: 2rem;
+}

app/controllers/management/conferences_controller.rb

@@ -44,6 +44,26 @@ module Management
       redirect_to management_root_path(current_conference: nil)
     end
 
+    def update_vote_data
+      @conference = find_conference
+
+      begin
+        if @conference.update_vote_data!
+          flash[:notice] = t '.vote_data_successfully_updated'
+        else
+          flash[:alert] = t '.error_during_vote_data_save'
+        end
+      rescue StandardError => e
+        flash[:alert] = t '.error_during_connection_with_voting_endpoint', error: e.message
+      end
+
+      redirect_to :back
+    end
+
+    def vote_results
+      @conference = find_conference
+    end
+
     private
 
     def find_conference
@@ -52,7 +72,8 @@ module Management
 
     def conference_params
       params.require(:conference).permit(
-        :title, :email, :start_date, :end_date, :description, :host_name, :planned_cfp_end_date,
+        :title, :email, :start_date, :end_date, :description, :host_name,
+        :planned_cfp_end_date, :vote_data_endpoint,
         event_types_attributes: [:id, :name, :description, :maximum_length,
                                  :minimum_length, :_destroy],
         tracks_attributes: [:id, :name, :color, :css_class, :description,

app/models/conference.rb

@@ -36,6 +36,14 @@ class Conference < ActiveRecord::Base
     submissions.group_by { |s| s.confirmed_at.to_date }
   end
 
+  def update_vote_data!
+    ConferenceVoteSummary.new(conference: self).save
+  end
+
+  def has_vote_results?
+    vote_data_updated_at.present?
+  end
+
   private
 
   def planned_cfp_end_date_is_before_start_date
@@ -49,4 +57,50 @@ class Conference < ActiveRecord::Base
       errors.add(:end_date, :cannot_be_before_start_date)
     end
   end
+
+  class ConferenceVoteSummary
+    include ActiveModel::Model
+
+    attr_accessor :conference
+
+    def number_of_ballots
+      @number_of_ballots ||= remote_summary_data['number_of_ballots']
+    end
+
+    def ranking
+      @ranking ||= remote_summary_data['ranking'].map { |ranking_entry| EventRanking.new ranking_entry }
+    end
+
+    def save
+      conference.transaction do
+        conference.update number_of_ballots_cast: number_of_ballots
+        ranking.all?(&:save) or raise ActiveRecord::Rollback
+        conference.touch :vote_data_updated_at
+        conference.save or raise ActiveRecord::Rollback
+      end
+    end
+
+    private
+
+    def conn
+      @conn ||= Faraday.new(url: conference.vote_data_endpoint + '/summary.json',
+                                  headers: {'Content-Type' => 'application/json'})
+    end
+
+    def remote_summary_data
+      @remote_summary_data ||= JSON.parse(conn.get do |request|
+                                            request.body = {summary: {talk_ids: Conference.last.events.pluck(:id)}}.to_json
+                                          end.body)
+    end
+
+    class EventRanking
+      include ActiveModel::Model
+
+      attr_accessor :talk_id, :votes, :place
+
+      def save
+        Event.find(talk_id).update(number_of_votes: votes, rank: place)
+      end
+    end
+  end
 end

app/models/event.rb

@@ -60,6 +60,14 @@ class Event < ActiveRecord::Base
     }
   end
 
+  def per_cent_of_votes
+    if conference.has_vote_results? and conference.number_of_ballots_cast > 0
+      Rational(number_of_votes * 100, conference.number_of_ballots_cast)
+    else
+      Float::NAN
+    end
+  end
+
   private
 
   def track_belongs_to_the_selected_conference

app/views/management/conferences/_form.html.slim

@@ -12,6 +12,7 @@
           = f.input :start_date, as: :date
           = f.input :end_date, as: :date
           = f.input :description
+          = f.input :vote_data_endpoint
       hr
       .row
         .col-lg-12

app/views/management/conferences/show.html.slim

@@ -85,3 +85,50 @@
 .row
   .col-lg-12
     .submissions-chart#submissions-chart data-submissions="#{submissions_chart_data(@conference).to_json}"
+- if @conference.vote_data_endpoint.present?
+  hr
+  .row
+    .col-lg-12
+      h2
+        => t '.voting_results'
+        small
+          - if @conference.vote_data_updated_at.present?
+            = t '.vote_data_updated_at', updated_at: l(@conference.vote_data_updated_at, format: :long)
+      .panel.panel-default
+        table.table.table-striped.table-hover.record-table
+          - if @conference.vote_data_updated_at.present?
+            thead
+              tr
+                th.text-right = t('.rank')
+                th.text-right = t('.percent')
+                th = Event.model_name.human.mb_chars.capitalize
+                th
+          tbody
+            - if @conference.vote_data_updated_at.present?
+              - current_conference.events.order(rank: :asc).group_by(&:rank).to_a[0..9].each do |rank, events|
+                - events.each.with_index do |event, index|
+                  tr
+                    - if index == 0
+                      td.text-right rowspan="#{events.count}"
+                        .large
+                          span.label.label-info = event.rank
+                      td.text-right rowspan="#{events.count}"
+                        span title="#{t('.vote_ratio', votes: event.number_of_votes, total_votes: @conference.number_of_ballots_cast)}"
+                          = number_to_percentage(event.per_cent_of_votes, strip_insignificant_zeros: true, precision: 2)
+                    td = event.title
+                    td.actions = action_buttons(@conference, event, [:show])
+            - else
+              tr
+                td.text-center colspan="20"
+                  p.large
+                    = t '.vote_data_never_updated'
+                  p
+                    =< link_to update_vote_data_management_conference_path, method: :patch, class: ['btn', 'btn-primary'] do
+                      = icon :refresh, t('.fetch_vote_results')
+        - if @conference.vote_data_updated_at.present?
+          .panel-footer.text-right
+            .btn-group
+              = link_to vote_results_management_conference_path, class: ['btn', 'btn-info'] do
+                = icon 'list-ol', t('.full_vote_results')
+              = link_to update_vote_data_management_conference_path, method: :patch, class: ['btn', 'btn-primary'] do
+                = icon :refresh, t('.fetch_vote_results')

app/views/management/conferences/vote_results.html.slim

@@ -0,0 +1,51 @@
+- content_for :title
+  = t '.vote_results'
+
+.row
+  .col-lg-12
+    h1.page-header
+      = t '.vote_results'
+      - if @conference.vote_data_updated_at.present?
+        small<
+          = t '.vote_data_updated_at', updated_at: l(@conference.vote_data_updated_at, format: :long)
+- if @conference.vote_data_endpoint.present?
+  .row
+    .col-lg-12
+      .panel.panel-default
+        table.table.table-striped.table-hover.record-table
+          - if @conference.vote_data_updated_at.present?
+            thead
+              tr
+                th.text-right = t('.rank')
+                th.text-right = t('.percent')
+                th = Event.model_name.human.mb_chars.capitalize
+                th
+          tbody
+            - if @conference.vote_data_updated_at.present?
+              - current_conference.events.order(rank: :asc).group_by(&:rank).each do |rank, events|
+                - events.each.with_index do |event, index|
+                  tr
+                    - if index == 0
+                      td.text-right rowspan="#{events.count}"
+                        .large
+                          span.label.label-info = event.rank
+                      td.text-right rowspan="#{events.count}"
+                        span title="#{t('.vote_ratio', votes: event.number_of_votes, total_votes: @conference.number_of_ballots_cast)}"
+                          = number_to_percentage(event.per_cent_of_votes, strip_insignificant_zeros: true, precision: 2)
+                    td = event.title
+                    td.actions = action_buttons(@conference, event, [:show])
+            - else
+              tr
+                td.text-center colspan="20"
+                  p.large
+                    = t '.vote_data_never_updated'
+                  p
+                    =< link_to update_vote_data_management_conference_path, method: :patch, class: ['btn', 'btn-primary'] do
+                      = icon :refresh, t('.fetch_vote_results')
+        - if @conference.vote_data_updated_at.present?
+          .panel-footer.text-right
+            .btn-group
+              = link_to management_conference_path, class: ['btn', 'btn-info'] do
+                = icon :users, t('.back_to', conference: @conference.title)
+              = link_to update_vote_data_management_conference_path, method: :patch, class: ['btn', 'btn-primary'] do
+                = icon :refresh, t('.fetch_vote_results')

config/locales/bg.yml

@@ -15,9 +15,31 @@ bg:
         contacts: "Данни за контакт"
         event_propositions: "Предложения за събития"
     conferences:
+      update_vote_data:
+        vote_data_successfully_updated: "Резултатите от гласуването бяха обновени успешно"
+        error_during_vote_data_save: "Възникна грешка при запазването на резултатите от гласуването"
+        error_during_connection_with_voting_endpoint: "Възникна грешка при опит за изтегляне на резултатите от гласуването: %{error}"
+      vote_results:
+        back_to: "Обратно към %{conference}"
+        vote_results: "Резултати от гласуването"
+        vote_data_never_updated: "Резулатите от гласуването не са изтеглени"
+        voting_results: "Резултати от гласуването"
+        vote_data_updated_at: "последно обновяване %{updated_at}"
+        vote_ratio: "%{votes} от общо %{total_votes} гласа"
+        fetch_vote_results: "Изтегли резултатите от гласуването"
+        percent: "%"
+        rank: "Позиция"
       show:
+        full_vote_results: "Пълни резултати от гласуването"
+        vote_data_never_updated: "Резулатите от гласуването не са изтеглени"
+        voting_results: "Резултати от гласуването"
+        vote_data_updated_at: "последно обновяване %{updated_at}"
+        vote_ratio: "%{votes} от общо %{total_votes} гласа"
         summary: 'Обобщение'
         cfp_status: 'Състояние на CFP:'
+        fetch_vote_results: "Изтегли резултатите от гласуването"
+        percent: "%"
+        rank: "Позиция"
     events:
       edit:
         edit: "Редакция на %{event_type} „%{event_title}“"

config/routes.rb

@@ -33,6 +33,11 @@ Rails.application.routes.draw do
     root to: 'conferences#index'
 
     resources :conferences do
+      member do
+        patch :update_vote_data
+        get :vote_results
+      end
+
       resources :events
       resources :volunteers
       resources :propositions

db/migrate/20161010163747_add_vote_data_to_conferences.rb

@@ -0,0 +1,7 @@
+class AddVoteDataToConferences < ActiveRecord::Migration
+  def change
+    add_column :conferences, :vote_data_endpoint, :string
+    add_column :conferences, :number_of_ballots_cast, :integer
+    add_column :conferences, :vote_data_updated_at, :datetime
+  end
+end

db/migrate/20161010170711_add_vote_data_to_events.rb

@@ -0,0 +1,6 @@
+class AddVoteDataToEvents < ActiveRecord::Migration
+  def change
+    add_column :events, :number_of_votes, :integer
+    add_column :events, :rank, :integer
+  end
+end