From 420a42bdb138c328d61cc64c4580ba5451c2d958 Mon Sep 17 00:00:00 2001
From: Petko Bordjukov <bordjukov@gmail.com>
Date: Tue, 6 Oct 2015 21:37:53 +0300
Subject: [PATCH] Rudimentary export

---
 app/controllers/application_controller.rb |  2 ++
 app/controllers/home_controller.rb        |  5 +++++
 app/models/ratings.rb                     | 16 ++++++++++++++++
 app/models/talk.rb                        |  5 +++++
 app/views/home/_talk.csv.erb              |  1 +
 app/views/home/ratings.csv.erb            |  3 +++
 config/routes.rb                          |  1 +
 7 files changed, 33 insertions(+)
 create mode 100644 app/models/ratings.rb
 create mode 100644 app/views/home/_talk.csv.erb
 create mode 100644 app/views/home/ratings.csv.erb

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 1dec6a9..5e12622 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,3 +1,5 @@
+require 'csv'
+
 class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 95f2992..9073dca 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -1,4 +1,9 @@
 class HomeController < ApplicationController
   def index
   end
+
+  def ratings
+    @talks = Talk.ordered_by_rating
+    @ratings = Ratings.new
+  end
 end
diff --git a/app/models/ratings.rb b/app/models/ratings.rb
new file mode 100644
index 0000000..1ba0a49
--- /dev/null
+++ b/app/models/ratings.rb
@@ -0,0 +1,16 @@
+class Ratings
+  @ratings = Hash.new(0)
+
+  def initialize
+    ratings = TalkPreference.all.pluck(:talks).reduce(Hash.new(0)) do |result, talks|
+      talks.map(&:to_i).each { |talk| result[talk] += 1 }
+      result
+    end.to_h
+
+    @ratings = Hash.new(0).merge!(ratings)
+  end
+
+  def [](id)
+    @ratings[id]
+  end
+end
diff --git a/app/models/talk.rb b/app/models/talk.rb
index 306b47d..42695da 100644
--- a/app/models/talk.rb
+++ b/app/models/talk.rb
@@ -1,4 +1,9 @@
 class Talk < ActiveResource::Base
   self.site = "https://cfp.openfest.org/api/conferences/2"
   self.element_name = "event"
+
+  def self.ordered_by_rating
+    ratings = Ratings.new
+    all.sort { |left, right| ratings[right.id] <=> ratings[left.id] }
+  end
 end
diff --git a/app/views/home/_talk.csv.erb b/app/views/home/_talk.csv.erb
new file mode 100644
index 0000000..b2a63e8
--- /dev/null
+++ b/app/views/home/_talk.csv.erb
@@ -0,0 +1 @@
+<%= CSV.generate_line([talk.id, talk.event_type.name, talk.title, talk.subtitle, @ratings[talk.id]]).html_safe -%>
diff --git a/app/views/home/ratings.csv.erb b/app/views/home/ratings.csv.erb
new file mode 100644
index 0000000..2a8e6ef
--- /dev/null
+++ b/app/views/home/ratings.csv.erb
@@ -0,0 +1,3 @@
+<%- headers = ['ID', 'Type', 'Title', 'Subtitle', 'Votes'] -%>
+<%= CSV.generate_line headers -%>
+<%= render partial: 'talk', collection: @talks %>
diff --git a/config/routes.rb b/config/routes.rb
index b7097bb..bcd85b9 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
   resources :talk_preferences, only: [:index, :show, :create, :update]
   root to: 'home#index'
+  get 'ratings' => 'home#ratings'
 end