Add change log in investment participatory budget

app/assets/stylesheets/admin.scss

@@ -595,6 +595,17 @@ code {
   }
 }
 
+.log-value {
+  max-height: rem-calc(65);
+  overflow: hidden;
+  max-width: rem-calc(200);
+
+  &:hover {
+    max-height: rem-calc(1000);
+    transition: max-height 0.9s;
+  }
+}
+
 // 04. Stats
 // ---------
 

app/controllers/admin/budget_investments_controller.rb

@@ -2,17 +2,19 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
   include FeatureFlags
   include CommentableActions
   include DownloadSettingsHelper
+  include ChangeLogHelper
 
   feature_flag :budgets
 
   has_orders %w[oldest], only: [:show, :edit]
   has_filters %w[all], only: [:index, :toggle_selection]
 
-  before_action :load_budget
+  before_action :load_budget, except: :show_investment_log
   before_action :load_investment, only: [:show, :edit, :update, :toggle_selection]
   before_action :load_ballot, only: [:show, :index]
   before_action :parse_valuation_filters
   before_action :load_investments, only: [:index, :toggle_selection]
+  before_action :load_change_log, only: [:show]
 
   def index
     respond_to do |format|
@@ -129,4 +131,8 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
         end
       end
     end
+
+    def load_change_log
+      @logs = Budget::Investment::ChangeLog.by_investment(@investment.id)
+    end
 end

app/controllers/application_controller.rb

@@ -13,6 +13,7 @@ class ApplicationController < ActionController::Base
   before_action :set_locale
   before_action :track_email_campaign
   before_action :set_return_url
+  before_action :set_current_user
   before_action :set_fallbacks_to_all_available_locales
 
   check_authorization unless: :devise_controller?
@@ -120,6 +121,10 @@ class ApplicationController < ActionController::Base
       Budget.current
     end
 
+    def set_current_user
+      User.current_user = current_user
+    end
+
     def set_fallbacks_to_all_available_locales
       Globalize.set_fallbacks_to_all_available_locales
     end

app/helpers/change_log_helper.rb

@@ -0,0 +1,8 @@
+module ChangeLogHelper
+
+  def show_investment_log
+    @log = Budget::Investment::ChangeLog.find_by(id: params[:id])
+    render "admin/change_logs/show"
+  end
+
+end

app/models/budget/investment.rb

@@ -3,6 +3,7 @@ class Budget
   class Investment < ApplicationRecord
     SORTING_OPTIONS = {id: "id", title: "title", supports: "cached_votes_up"}.freeze
 
+    include ActiveModel::Dirty
     include Rails.application.routes.url_helpers
     include Measurable
     include Sanitizable
@@ -100,6 +101,7 @@ class Budget
     after_save :recalculate_heading_winners
     before_validation :set_responsible_name
     before_validation :set_denormalized_ids
+    after_update :change_log
 
     def comments_count
       comments.count
@@ -391,5 +393,18 @@ class Budget
         self.budget_id ||= heading.try(:group).try(:budget_id)
       end
 
+      def change_log
+        self.changed.each do |field|
+          unless field == "updated_at"
+            log = Budget::Investment::ChangeLog.new
+            log.field = field
+            log.author_id = User.current_user.id unless User.current_user.nil?
+            log.investment_id = self.id
+            log.new_value = self.send field
+            log.old_value = self.send "#{field}_was"
+            !log.save
+          end
+        end
+      end
   end
 end

app/models/budget/investment/change_log.rb

@@ -0,0 +1,10 @@
+class Budget::Investment::ChangeLog < ActiveRecord::Base
+  belongs_to :author, -> { with_hidden }, class_name: "User", foreign_key: "author_id", required: false
+
+  validates :old_value, presence: true
+  validates :new_value, presence: true
+  validates :field, presence: true
+
+  scope :by_investment,     ->(investment_id) { where(investment_id: investment_id) }
+
+end

app/models/user.rb

@@ -350,6 +350,15 @@ class User < ApplicationRecord
     followables.compact.map { |followable| followable.tags.map(&:name) }.flatten.compact.uniq
   end
 
+
+  def self.current_user
+    Thread.current[:user]
+  end
+
+  def self.current_user=(user)
+    Thread.current[:user] = user
+  end
+
   def send_devise_notification(notification, *args)
     devise_mailer.send(notification, self, *args).deliver_later
   end

app/views/admin/budget_investments/show.html.erb

@@ -67,3 +67,5 @@
 <%= render "valuation/budget_investments/valuation_comments" %>
 
 <%= render "admin/milestones/milestones", milestoneable: @investment %>
+
+<%= render "admin/change_logs/change_log", logs: @logs %>

app/views/admin/change_logs/_change_log.html.erb

@@ -0,0 +1,44 @@
+<h2 class="inline-block"><%= t("admin.change_log.title") %></h2>
+
+<% if logs.empty? %>
+  <label><%= t("admin.change_log.empty") %></label>
+<% else %>
+  <table>
+    <thead>
+    <tr>
+      <th><%= t("admin.change_log.id") %></th>
+      <th><%= t("admin.change_log.field") %></th>
+      <th><%= t("admin.change_log.old_value") %></th>
+      <th><%= t("admin.change_log.new_value") %></th>
+      <th><%= t("admin.change_log.edited_at") %></th>
+      <th><%= t("admin.change_log.edited_by") %></th>
+      <th><%= t("admin.change_log.actions") %></th>
+    </tr>
+    </thead>
+    <tbody>
+    <% logs.each do |log| %>
+      <tr id="log_<%= log.id %>">
+        <td class="text-center"><%= log.id %></td>
+        <td class="small"><%= log.field.capitalize %></td>
+        <td class="small">
+          <div class="log-value"><%= log.old_value %></div>
+        </td>
+        <td class="small">
+          <div class="log-value"><%= log.new_value %></div>
+        </td>
+        <td class="small">
+          <%= log.created_at.to_date %>
+        </td>
+        <td class="small">
+          <%= log.author.name unless log.author.nil? %>
+        </td>
+        <td>
+          <%= link_to admin_change_log_path(id: log) do %>
+            <button class="button hollow primary"><%= t("shared.show") %></button>
+          <% end %>
+        </td>
+      </tr>
+    <% end %>
+    </tbody>
+  </table>
+<% end %>

app/views/admin/change_logs/show.html.erb

@@ -0,0 +1,12 @@
+<h2 class="inline-block"><%= t("admin.change_log.title") %></h2>
+
+<label><strong><%= t("admin.change_log.id") %></strong></label>
+<p><%= @log.id %></p>
+<label><strong><%= t("admin.change_log.old_value") %></strong></label>
+<p><%= @log.old_value %></p>
+<label><strong><%= t("admin.change_log.new_value") %></strong></label>
+<p><%= @log.new_value %></p>
+<label><strong><%= t("admin.change_log.edited_at") %></strong></label>
+<p><%= @log.created_at.to_date %></p>
+<label><strong><%= t("admin.change_log.edited_by") %></strong></label>
+<p><%= @log.author.name unless @log.author.nil? %></p>

config/locales/en/admin.yml

@@ -1638,3 +1638,13 @@ en:
     translations:
         remove_language: Remove language
         add_language: Add language
+    change_log:
+        title: "Change Log"
+        id: "ID"
+        field: "Field"
+        new_value: "New Value"
+        old_value: "Old Value"
+        edited_at: "Edited at"
+        edited_by: "Edited by"
+        actions: "Actions"
+        empty: "There are not changes logged"

config/locales/es/admin.yml

@@ -1636,3 +1636,13 @@ es:
     translations:
       remove_language: Eliminar idioma
       add_language: Añadir idioma
+    change_log:
+        title: "Historial"
+        id: "ID"
+        field: "Campo"
+        new_value: "Valor nuevo"
+        old_value: "Valor anterior"
+        edited_at: "Editado el"
+        edited_by: "Editado por"
+        actions: "Acciones"
+        empty: "No hay cambios registrados"

config/routes/admin.rb

@@ -245,6 +245,10 @@ namespace :admin do
     resources :actions, only: [:index, :new, :create, :edit, :update, :destroy]
     resources :administrator_tasks, only: [:index, :edit, :update]
   end
+
   get 'download_settings/:resource', to: 'download_settings#edit', as: 'edit_download_settings'
   put 'download_settings/:resource', to: 'download_settings#update', as: 'update_download_settings'
+
+  get "/change_log/:id", to: "budget_investments#show_investment_log", as: "change_log"
+
 end

db/migrate/20190423084112_create_budget_investment_change_logs.rb

@@ -0,0 +1,13 @@
+class CreateBudgetInvestmentChangeLogs < ActiveRecord::Migration
+  def change
+    create_table :budget_investment_change_logs do |t|
+      t.integer :investment_id
+      t.integer :author_id
+      t.string :field
+      t.string :new_value
+      t.string :old_value
+
+      t.timestamps null: false
+    end
+  end
+end

db/schema.rb

@@ -134,9 +134,9 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.integer  "budget_id"
     t.datetime "created_at",                         null: false
     t.datetime "updated_at",                         null: false
-    t.integer  "ballot_lines_count", default: 0
     t.boolean  "physical",           default: false
     t.integer  "poll_ballot_id"
+    t.integer  "ballot_lines_count", default: 0
   end
 
   create_table "budget_content_blocks", force: :cascade do |t|
@@ -188,6 +188,16 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.index ["group_id"], name: "index_budget_headings_on_group_id", using: :btree
   end
 
+  create_table "budget_investment_change_logs", force: :cascade do |t|
+    t.integer  "investment_id"
+    t.integer  "author_id"
+    t.string   "field"
+    t.string   "new_value"
+    t.string   "old_value"
+    t.datetime "created_at",    null: false
+    t.datetime "updated_at",    null: false
+  end
+
   create_table "budget_investment_milestone_translations", force: :cascade do |t|
     t.integer  "budget_investment_milestone_id", null: false
     t.string   "locale",                         null: false
@@ -1177,12 +1187,12 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.integer  "comments_count",     default: 0
     t.integer  "author_id"
     t.datetime "hidden_at"
-    t.string   "slug"
     t.boolean  "results_enabled",    default: false
     t.boolean  "stats_enabled",      default: false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer  "budget_id"
+    t.string   "slug"
     t.string   "related_type"
     t.integer  "related_id"
     t.index ["budget_id"], name: "index_polls_on_budget_id", unique: true, using: :btree

spec/features/admin/change_log_spec.rb

@@ -0,0 +1,71 @@
+require "rails_helper"
+
+feature "Admin change log" do
+  let(:budget) {create(:budget)}
+  let(:administrator) do
+    create(:administrator, user: create(:user, username: "Ana", email: "ana@admins.org"))
+  end
+
+  context "Investments Participatory Budgets" do
+
+    background do
+      @admin = create(:administrator)
+      login_as(@admin.user)
+    end
+
+    scenario "No changes" do
+      budget_investment = create(:budget_investment,
+                                 price: 1234,
+                                 price_first_year: 1000,
+                                 feasibility: "unfeasible",
+                                 unfeasibility_explanation: "It is impossible",
+                                 administrator: administrator)
+
+      visit admin_budget_budget_investments_path(budget_investment.budget)
+
+      click_link budget_investment.title
+
+      expect(page).to have_content(budget_investment.title)
+      expect(page).to have_content(budget_investment.description)
+      expect(page).to have_content(budget_investment.author.name)
+      expect(page).to have_content(budget_investment.heading.name)
+      expect(page).to have_content("There are not changes logged")
+    end
+
+    scenario "Changes" do
+      budget_investment = create(:budget_investment,
+                                 price: 1234,
+                                 price_first_year: 1000,
+                                 feasibility: "unfeasible",
+                                 unfeasibility_explanation: "It is impossible",
+                                 administrator: administrator)
+
+      visit admin_budget_budget_investments_path(budget_investment.budget)
+
+      click_link budget_investment.title
+
+      expect(page).to have_content(budget_investment.title)
+      expect(page).to have_content(budget_investment.description)
+      expect(page).to have_content(budget_investment.author.name)
+      expect(page).to have_content(budget_investment.heading.name)
+      expect(page).to have_content("There are not changes logged")
+
+      budget_investment.update(title: "test")
+
+      visit admin_budget_budget_investments_path(budget_investment.budget)
+
+      click_link budget_investment.title
+
+      expect(page).not_to have_content("There are not changes logged")
+      expect(page).to have_content("Change Log")
+      expect(page).to have_content("Title")
+      expect(page).to have_content("test")
+      expect(page).to have_content("Field")
+      expect(page).to have_content("Old Value")
+      expect(page).to have_content("New Value")
+      expect(page).to have_content("Edited at")
+      expect(page).to have_content("Edited by")
+    end
+
+  end
+end