From 03dfaadb823c2b3553a476a72612d44dc368e84f Mon Sep 17 00:00:00 2001
From: Petko Bordjukov <bordjukov@gmail.com>
Date: Mon, 10 Oct 2016 00:20:20 +0300
Subject: [PATCH] Add a simple summary export

---
 app/controllers/home_controller.rb   |  4 ++++
 app/models/summary.rb                | 23 +++++++++++++++++++++++
 app/views/home/summary.json.jbuilder |  1 +
 config/routes.rb                     |  7 ++++++-
 4 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 app/models/summary.rb
 create mode 100644 app/views/home/summary.json.jbuilder

diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 40e2f29..cc6e68e 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -11,4 +11,8 @@ class HomeController < ApplicationController
   def export
     @talk_preferences = TalkPreference.this_years.eager_load(:selected_talks)
   end
+
+  def summary
+    @summary = Summary.new params[:summary]
+  end
 end
diff --git a/app/models/summary.rb b/app/models/summary.rb
new file mode 100644
index 0000000..d55f7aa
--- /dev/null
+++ b/app/models/summary.rb
@@ -0,0 +1,23 @@
+class Summary
+  def initialize(params = {})
+    @talk_id, @other_talk_ids = params[:talk_id], params[:other_talk_ids]
+    @votes_count = SelectedTalk.where(talk_id: @talk_id).count
+    @all_votes_count = TalkPreference.joins(:selected_talks).where(selected_talks: {talk_id: @other_talk_ids << @talk_id}).count
+  end
+
+  def summary
+    {
+     talk_id: @talk_id,
+     votes: @votes_count,
+     all_votes: @all_votes_count,
+     per_cent: Rational(@votes_count, @all_votes_count).to_f,
+     conflicts: conflicts
+    }
+  end
+
+  def conflicts
+    @other_talk_ids.map do |right|
+      [right, ConflictCoefficient.new(@talk_id, right).conflicts]
+    end.to_h
+  end
+end
diff --git a/app/views/home/summary.json.jbuilder b/app/views/home/summary.json.jbuilder
new file mode 100644
index 0000000..525c250
--- /dev/null
+++ b/app/views/home/summary.json.jbuilder
@@ -0,0 +1 @@
+json.merge! @summary.summary
diff --git a/config/routes.rb b/config/routes.rb
index c9ec5d5..2a0925f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -3,6 +3,11 @@ Rails.application.routes.draw do
   root to: 'home#index'
   get 'ratings' => 'home#ratings'
   get 'export' => 'home#export'
-  resources :conflicts
+  get 'summary' => 'home#summary'
+  resources :conflicts do
+    collection do
+      get 'pivot'
+    end
+  end
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 end