PMueller solution

source/Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-
+gem 'httparty', '~> 0.13.5'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '4.1.6'
 # Use sqlite3 as the database for Active Record
@@ -35,7 +35,7 @@ gem 'spring',        group: :development
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
-# Use debugger
-# gem 'debugger', group: [:development, :test]
+gem 'pry', group: [:development, :test]
+gem 'pry-rails', group: [:development, :test]
  gem 'rspec-rails', group: [:development, :test]
 

source/Gemfile.lock

@@ -29,6 +29,7 @@ GEM
       tzinfo (~> 1.1)
     arel (5.0.1.20140414130214)
     builder (3.2.2)
+    coderay (1.1.0)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.0)
@@ -40,6 +41,9 @@ GEM
     erubis (2.7.0)
     execjs (2.2.1)
     hike (1.2.3)
+    httparty (0.13.5)
+      json (~> 1.8)
+      multi_xml (>= 0.5.2)
     i18n (0.6.11)
     jbuilder (2.2.2)
       activesupport (>= 3.0.0, < 5)
@@ -50,9 +54,17 @@ GEM
     json (1.8.1)
     mail (2.6.1)
       mime-types (>= 1.16, < 3)
+    method_source (0.8.2)
     mime-types (2.4.1)
     minitest (5.4.2)
     multi_json (1.10.1)
+    multi_xml (0.5.5)
+    pry (0.10.1)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
+    pry-rails (0.3.4)
+      pry (>= 0.9.10)
     rack (1.5.2)
     rack-test (0.6.2)
       rack (>= 1.0)
@@ -99,6 +111,7 @@ GEM
     sdoc (0.4.1)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
+    slop (3.6.0)
     spring (1.1.3)
     sprockets (2.11.0)
       hike (~> 1.2)
@@ -126,8 +139,11 @@ PLATFORMS
 
 DEPENDENCIES
   coffee-rails (~> 4.0.0)
+  httparty (~> 0.13.5)
   jbuilder (~> 2.0)
   jquery-rails
+  pry
+  pry-rails
   rails (= 4.1.6)
   rspec-rails
   sass-rails (~> 4.0.3)

source/app/assets/stylesheets/scaffolds.css.scss

@@ -0,0 +1,69 @@
+body {
+  background-color: #fff;
+  color: #333;
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+}
+
+p, ol, ul, td {
+  font-family: verdana, arial, helvetica, sans-serif;
+  font-size: 13px;
+  line-height: 18px;
+}
+
+pre {
+  background-color: #eee;
+  padding: 10px;
+  font-size: 11px;
+}
+
+a {
+  color: #000;
+  &:visited {
+    color: #666;
+  }
+  &:hover {
+    color: #fff;
+    background-color: #000;
+  }
+}
+
+div {
+  &.field, &.actions {
+    margin-bottom: 10px;
+  }
+}
+
+#notice {
+  color: green;
+}
+
+.field_with_errors {
+  padding: 2px;
+  background-color: red;
+  display: table;
+}
+
+#error_explanation {
+  width: 450px;
+  border: 2px solid red;
+  padding: 7px;
+  padding-bottom: 0;
+  margin-bottom: 20px;
+  background-color: #f0f0f0;
+  h2 {
+    text-align: left;
+    font-weight: bold;
+    padding: 5px 5px 5px 15px;
+    font-size: 12px;
+    margin: -7px;
+    margin-bottom: 0px;
+    background-color: #c00;
+    color: #fff;
+  }
+  ul li {
+    font-size: 12px;
+    list-style: square;
+  }
+}

source/app/controllers/urls_controller.rb

@@ -1,2 +1,62 @@
 class UrlsController < ApplicationController
+  before_action :set_url, only: [:edit, :update, :destroy]
+  before_action :set_url_by_shortened, only: [:show]
+
+  def index
+    @urls = Url.all
+  end
+
+  def show
+    @url.increment(:click_count); @url.save
+    redirect_to @url.original
+  end
+
+  def new
+    @url = Url.new
+  end
+
+  def edit
+  end
+
+  def create
+    @url = Url.new(url_params)
+
+    respond_to do |format|
+      if @url.save
+        format.html { redirect_to urls_path, notice: 'Url was successfully created.' }
+      else
+        format.html { render :new }
+      end
+    end
+  end
+
+  def update
+    respond_to do |format|
+      if @url.update(url_params)
+        format.html { redirect_to urls_path, notice: 'Url was successfully updated.' }
+      else
+        format.html { render :edit }
+      end
+    end
+  end
+
+  def destroy
+    @url.destroy
+    respond_to do |format|
+      format.html { redirect_to urls_path, notice: 'Url was successfully destroyed.' }
+    end
+  end
+
+  private
+    def set_url
+      @url = Url.find(params[:id])
+    end
+
+    def set_url_by_shortened
+      @url = Url.find_by(shortened: params[:shortened])
+    end
+
+    def url_params
+      params.require(:url).permit(:shortened, :original)
+    end
 end

source/app/models/url.rb

@@ -0,0 +1,22 @@
+class Url < ActiveRecord::Base
+  before_save :shorten
+
+  validates :shortened, uniqueness: true
+  validate :protocol_check, :resolvable_check
+
+  def shorten
+    self.shortened ||= SecureRandom.urlsafe_base64(5)
+  end
+
+  def protocol_check
+    errors[:original] <<  "URL must begin with http:// or https://" unless original.match(/^https?:\/\//)
+  end
+
+  def resolvable_check
+    begin
+      HTTParty.get(original).code == 200
+    rescue
+      errors[:original] << "not resolvable"
+    end
+  end
+end

source/app/views/urls/_form.html.erb

@@ -0,0 +1,21 @@
+<%= form_for(@url) do |f| %>
+  <% if @url.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(@url.errors.count, "error") %> prohibited this url from being saved:</h2>
+
+      <ul>
+      <% @url.errors.full_messages.each do |message| %>
+        <li><%= message %></li>
+      <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= f.label :original %><br>
+    <%= f.text_field :original %>
+  </div>
+  <div class="actions">
+    <%= f.submit %>
+  </div>
+<% end %>

source/app/views/urls/edit.html.erb

@@ -0,0 +1,6 @@
+<h1>Editing url</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Show', @url %> |
+<%= link_to 'Back', urls_path %>

source/app/views/urls/index.html.erb

@@ -0,0 +1,28 @@
+<h1>Listing urls</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Clicks</th>
+      <th>Shortened</th>
+      <th>Original</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @urls.each do |url| %>
+      <tr>
+        <td><%= url.click_count %></td>
+        <td><%= link_to url.shortened, shortened_path(url.shortened)  %></td>
+        <td><%= url.original %></td>
+        <td><%= link_to 'Edit', edit_url_path(url) %></td>
+        <td><%= link_to 'Destroy', url, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Url', new_url_path %>

source/app/views/urls/new.html.erb

@@ -0,0 +1,5 @@
+<h1>New url</h1>
+
+<%= render 'form' %>
+
+<%= link_to 'Back', urls_path %>

source/config/routes.rb

@@ -1,4 +1,7 @@
 Rails.application.routes.draw do
+
+  resources :urls, except: [:show]
+  get ':shortened' => 'urls#show', as: :shortened
   # The priority is based upon order of creation: first created -> highest priority.
   # See how all your routes lay out with "rake routes".
 

source/db/migrate/20150601051242_create_urls.rb

@@ -0,0 +1,10 @@
+class CreateUrls < ActiveRecord::Migration
+  def change
+    create_table :urls do |t|
+      t.string :shortened
+      t.string :original
+
+      t.timestamps
+    end
+  end
+end

source/db/migrate/20150601143819_add_urls_count.rb

@@ -0,0 +1,5 @@
+class AddUrlsCount < ActiveRecord::Migration
+  def change
+      add_column :urls, :click_count, :integer, default: 0
+  end
+end

source/db/schema.rb

@@ -0,0 +1,24 @@
+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20150601143819) do
+
+  create_table "urls", force: true do |t|
+    t.string   "shortened"
+    t.string   "original"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.integer  "click_count", default: 0
+  end
+
+end