Add tax_references, its controller and some basic pages for viewing ref data about taxes.

app/assets/stylesheets/tax_references.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the TaxReferences controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: https://sass-lang.com/

app/controllers/tax_references_controller.rb

@@ -0,0 +1,10 @@
+class TaxReferencesController < ApplicationController
+  def index
+    @tax_references = TaxReference.all
+  end
+
+  def show
+    @tax_references = TaxReference.all
+    @tax_reference = TaxReference.find_by(year: params[:year])
+  end
+end

app/helpers/tax_references_helper.rb

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

app/models/tax_reference.rb

@@ -0,0 +1,17 @@
+class TaxReference < ApplicationRecord
+  validates :year, uniqueness: true
+  MAX_MONTHLY_HOURS = 172
+
+  def worker_contribution(number_of_hours)
+    return self.hourly_wage * number_of_hours * self.worker_percentage / 100
+  end
+
+  def employer_contribution(number_of_hours)
+    return self.hourly_wage * number_of_hours * self.employer_percentage / 100
+  end
+
+  def total_contribution(number_of_hours)
+    return self.employer_contribution(number_of_hours) +
+        self.worker_contribution(number_of_hours)
+  end
+end

app/views/layouts/_top_navigation.html.erb

@@ -7,11 +7,11 @@
 
   <div class="collapse navbar-collapse" id="navbarSupportedContent">
     <ul class="navbar-nav mr-auto">
-      <li class="nav-item active">
-        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
+      <li class="nav-item">
+        <%= link_to(t('Home'), root_path, class: 'nav-link') %>
       </li>
       <li class="nav-item">
-        <a class="nav-link" href="#">Link</a>
+        <%= link_to(t('Tax References Tables'), tax_references_path, class: 'nav-link') %>
       </li>
       <li class="nav-item dropdown">
         <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">

app/views/tax_references/_top_list.html.erb

@@ -0,0 +1,13 @@
+<ul class="nav nav-tabs" role="tablist">
+  <% tax_references.each do |tax_ref| %>
+    <li class="nav-item">
+      <% item_class = 'nav-link' %>
+      <% if not @tax_reference.nil? and tax_ref.year == @tax_reference.year %>
+        <% item_class.concat(' active') %>
+      <% end %>
+
+      <%= link_to tax_ref.year, {controller: 'tax_references', action: :show, year: tax_ref.year},
+                  class: item_class %>
+    </li>
+  <% end %>
+</ul>

app/views/tax_references/index.html.erb

@@ -0,0 +1 @@
+<%= render 'top_list', tax_references: @tax_references %>

app/views/tax_references/show.html.erb

@@ -0,0 +1,28 @@
+<%= render 'top_list', tax_references: @tax_references %>
+
+<p><%= @tax_reference.year %></p>
+<p><%= @tax_reference.hourly_wage %></p>
+<p><%= number_to_percentage(@tax_reference.worker_percentage, precision: 2) %></p>
+<p><%= number_to_percentage(@tax_reference.employer_percentage, precision: 2) %></p>
+
+<table>
+  <thead>
+  <tr>
+    <th><%= t('Number of Hours') %></th>
+    <th><%= t('Employer (extra)') %></th>
+    <th><%= t('Worker (discount)') %></th>
+    <th><%= t('Total contribution') %></th>
+  </tr>
+  </thead>
+  <tbody>
+  <% hourly_contribution = @tax_reference.hourly_wage / 100 %>
+  <% (@tax_reference.min_monthly_hours..TaxReference::MAX_MONTHLY_HOURS).each do |n_hours| %>
+    <tr>
+      <td><%= n_hours %></td>
+      <td><%= number_to_currency(@tax_reference.employer_contribution(n_hours), locale: :pt) %></td>
+      <td><%= number_to_currency(@tax_reference.worker_contribution(n_hours), locale: :pt) %></td>
+      <td><%= number_to_currency(@tax_reference.total_contribution(n_hours), locale: :pt) %></td>
+    </tr>
+  <% end %>
+  </tbody>
+</table>

config/locales/pt.yml

@@ -0,0 +1,10 @@
+pt:
+  hello: "Olá Mundo"
+  number:
+    currency:
+      format:
+        unit: '€'
+        delimiter: ','
+        separator: '.'
+        precision: 2
+        format: '%u%n'

config/routes.rb

@@ -1,6 +1,8 @@
 Rails.application.routes.draw do
   devise_for :users
   get 'pages/home'
+  get '/tax_references', to: 'tax_references#index'
+  get '/tax_references/:year', to: 'tax_references#show'
   mount RailsAdmin::Engine => '/admin', as: 'rails_admin'
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
 

db/migrate/20200909112404_create_tax_references.rb

@@ -0,0 +1,13 @@
+class CreateTaxReferences < ActiveRecord::Migration[6.0]
+  def change
+    create_table :tax_references do |t|
+      t.integer :year
+      t.float :hourly_wage
+      t.integer :min_monthly_hours
+      t.float :worker_percentage
+      t.float :employer_percentage
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_08_19_085432) do
+ActiveRecord::Schema.define(version: 2020_09_09_112404) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -41,6 +41,16 @@ ActiveRecord::Schema.define(version: 2020_08_19_085432) do
     t.index ["unlock_token"], name: "index_admins_on_unlock_token", unique: true
   end
 
+  create_table "tax_references", force: :cascade do |t|
+    t.integer "year"
+    t.float "hourly_wage"
+    t.integer "min_monthly_hours"
+    t.float "worker_percentage"
+    t.float "employer_percentage"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
   create_table "users", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false

test/controllers/tax_references_controller_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class TaxReferencesControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/fixtures/tax_references.yml

@@ -0,0 +1,15 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  year: 1
+  hourly_wage: 1.5
+  min_monthly_hours: 1
+  worker_percentage: 1.5
+  employer_percentage: 1.5
+
+two:
+  year: 1
+  hourly_wage: 1.5
+  min_monthly_hours: 1
+  worker_percentage: 1.5
+  employer_percentage: 1.5

test/models/tax_reference_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class TaxReferenceTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end