Singleton instead of model

Gemfile

@@ -45,15 +45,6 @@ group :development, :test do
   gem 'mysql2', '~> 0.3.18'
 end
 
-gem 'slim-rails'
-gem 'activeadmin', '~> 1.0.0.pre2'
-gem 'devise'
-gem 'bullet', :group => 'development'
-gem 'jquery-ui-rails'
-gem 'exception_notification'
-gem 'pundit'
-gem 'bootstrap-sass', '~> 3.3.5'
-
 group :test do
   gem 'cucumber-rails', :require => false
   # database_cleaner is not required, but highly recommended
@@ -71,4 +62,7 @@ gem 'activeadmin', '~> 1.0.0.pre2'
 gem 'devise'
 gem 'bullet', :group => 'development'
 gem 'jquery-ui-rails'
-gem 'exception_notification'
+gem 'pundit'
+gem 'bootstrap-sass', '~> 3.3.5'
+gem 'exception_notification'
+gem 'rails_autolink'

Gemfile.lock

@@ -184,6 +184,8 @@ GEM
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
+    rails_autolink (1.1.6)
+      rails (> 3.1)
     rails_serve_static_assets (0.0.4)
     rails_stdout_logging (0.0.4)
     railties (4.2.0)
@@ -295,6 +297,7 @@ DEPENDENCIES
   pundit
   rails (= 4.2.0)
   rails_12factor
+  rails_autolink
   rspec-rails (~> 3.0)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)

app/assets/javascripts/showbill.coffee

@@ -0,0 +1,33 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/
+
+$(document).on "ready", ->
+  $('.showbill').on "keyup", ->
+    $.ajax({method: "PATCH", url: "showbill/" + $(this).attr("id"), data: make_data($(this)) , dataType:"script"})
+
+  # converts div.html to textarea.text
+  $('.showbill-div').on "click", ->
+    if $('textarea').is('.showbill')
+      text = $('.showbill-div').html().replace( /<br>/g,"\n")
+      $('.showbill').text(disable_links(clean_text(text)))
+      $('.showbill').show().focus()
+      $('.showbill-div').hide()
+
+  $('.showbill').on "blur", ->
+    $('.showbill').hide()
+    $('.showbill-div').show()
+
+make_data = (item) ->
+  return {} =
+  #we'll need description in one line. Replacing \n by <br> to don't lose them.
+  description: item.val().replace(/\n/g, "<br />")
+  id: $(item).attr("id")
+
+#extracts link_text from link_tag by deleting <a...> and </a>
+disable_links = (text) ->
+  text.replace(/<a.*?">/g, "").replace(/<\/a>/g,"")
+
+clean_text = (text) ->
+  text.replace(/^\n*\s*\n*\s*/,"").replace(/\s*$/,"")
+

app/controllers/showbill_controller.rb

@@ -0,0 +1,13 @@
+class ShowbillController < ApplicationController
+
+  def update
+
+    if current_user.present?
+      @error = t(:error_update_text) unless @showbill = Showbill_singleton.instance.update(params[:description])
+    else
+      @error = t(:you_can_not_edit_it)
+    end
+
+  end
+
+end

app/controllers/user_controller.rb

@@ -28,5 +28,6 @@ def users_to_show
     else
       @users = User.order(:name)
     end
+    @showbill = Showbill_singleton.instance.text
   end
 end

app/helpers/showbill_helper.rb

@@ -0,0 +1,2 @@
+module ShowbillHelper
+end

app/models/showbill_singleton.rb

@@ -0,0 +1,21 @@
+require 'singleton'
+
+class Showbill_singleton
+  include Singleton
+
+  attr_accessor :text
+
+  def initialize
+    @text = "Some default description"
+  end
+
+  def update(text)
+    text.present? ? @text = text : false
+  end
+
+  def text
+    @text.present? ? @text : initialize
+  end
+
+
+end

app/views/showbill/_showbill.html.slim

@@ -0,0 +1,7 @@
+.row
+  .col-md-12 class = "showbill-div"
+    = auto_link(@showbill)
+.row
+  - if current_user.present?
+    .col-md-12
+      = text_area_tag("showbill", @showbill,  {class: "showbill width-max-avail", hidden: "hidden"})

app/views/showbill/update.js.slim

@@ -0,0 +1,9 @@
+- if @error
+  | $("#error_label").text("
+  = @error
+  | ");
+  | $("#error_row").show();
+- else
+  | $("#error_row").hide();
+  | $('.showbill-div').text("");
+  | $('.showbill-div').append('#{auto_link(@showbill)}');

app/views/user/index.html.slim

@@ -1,3 +1,5 @@
+= render :partial => '/showbill/showbill', :showbills => @showbills
+
 - @users.each do |user|
   .row id = user.name_without_spaces
     .col-md-2 class = "name bold"

app/views/user/update.js.slim

@@ -4,3 +4,5 @@
   = @error
   | ");
   | $("#error_row").show();
+- else
+  | $("#error_row").hide();

config/locales/en.yml

@@ -36,3 +36,4 @@ en:
   user_details: "User Details"
   sign_up: "Sign up"
   or: "or"
+  you_can_not_edit_it: "You can not edit it!"

config/routes.rb

@@ -1,7 +1,9 @@
 Rails.application.routes.draw do
+
   devise_for :users, :controllers => {:registrations => "user/registrations"}
 
   resources :user, only: [:index, :update]
+  resources :showbill, only: [:update]
 
   devise_for :admin_users, ActiveAdmin::Devise.config
   ActiveAdmin.routes(self)