Generate Certificates PDF with GEM PRAWN

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 .bundle
 .rvmrc
 db/*.sqlite3

Gemfile

@@ -13,6 +13,9 @@ gem 'rdiscount'
 gem 'yaml_db'
 gem 'draper'
 
+gem 'prawn'
+gem "pdf-inspector", :group => [:test, :development]
+
 group :development do
   gem 'capistrano'
   gem 'debugger'
@@ -21,6 +24,7 @@ end
 gem 'pg', :group => :production
 gem 'sqlite3', :group => [:test, :development]
 
+
 group :test do
   gem 'rspec-rails', '~> 2.4'
   gem 'capybara'

Gemfile.lock

@@ -1,6 +1,7 @@
 GEM
   remote: http://rubygems.org/
   specs:
+    Ascii85 (1.0.2)
     actionmailer (3.1.0)
       actionpack (= 3.1.0)
       mail (~> 2.3.0)
@@ -30,6 +31,7 @@ GEM
       activesupport (= 3.1.0)
     activesupport (3.1.0)
       multi_json (~> 1.0)
+    afm (0.2.0)
     arel (2.2.1)
     bcrypt-ruby (3.0.0)
     builder (3.0.0)
@@ -72,6 +74,7 @@ GEM
       thor (~> 0.14.6)
     guard-rspec (0.4.3)
       guard (>= 0.4.0)
+    hashery (2.1.0)
     hashie (1.2.0)
     heroku (2.35.0)
       heroku-api (~> 0.3.7)
@@ -127,8 +130,19 @@ GEM
     omniauth-oauth2 (1.1.1)
       oauth2 (~> 0.8.0)
       omniauth (~> 1.0)
+    pdf-inspector (1.0.2)
+      pdf-reader (>= 0.9.0)
+    pdf-reader (1.3.2)
+      Ascii85 (~> 1.0.0)
+      afm (~> 0.2.0)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
     pg (0.14.0)
     polyglot (0.3.2)
+    prawn (0.12.0)
+      pdf-reader (>= 0.9.0)
+      ttfunk (~> 1.0.2)
     pry (0.9.12)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
@@ -176,6 +190,7 @@ GEM
       activesupport (~> 3.0)
       railties (~> 3.0)
       rspec (~> 2.6.0)
+    ruby-rc4 (0.1.5)
     rubyzip (0.9.4)
     selenium-webdriver (2.7.0)
       childprocess (>= 0.2.1)
@@ -193,6 +208,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
+    ttfunk (1.0.3)
     tzinfo (0.3.29)
     xpath (0.1.4)
       nokogiri (~> 1.3)
@@ -218,7 +234,9 @@ DEPENDENCIES
   omniauth (~> 1.0)
   omniauth-facebook
   omniauth-github
+  pdf-inspector
   pg
+  prawn
   pry
   rails
   rdiscount

app/controllers/certificates_controller.rb

@@ -0,0 +1,47 @@
+class CertificatesController < ApplicationController
+  respond_to :html
+  filter_resource_access
+
+  def index
+    @certificates = Certificate.joins(:event).where("user_id = ? and confirmed = ? and events.event_date <= ?", current_user.id, true, Date.current)
+    @breadcrumb = "Meus Certificados"
+  end
+
+  def create
+    @certificate = Certificate.where("user_id = ? and event_id = ? and go = ?", current_user.id, params[:certificate][:event_id], true)
+    unless @certificate.present?  
+      @certificate = Certificate.create(params[:certificate].merge(:go => true))
+      redirect_to(event_path(@certificate.event))
+    else
+      flash[:error] = "Sorry."
+      redirect_to events_url
+    end
+  end
+
+  def update
+    @certificate = Certificate.find(params[:id])
+    if @certificate.update_attributes(:confirmed => true)
+      flash[:notice] = 'Certificate was successfully updated.'
+      respond_with @certificate.event
+    else
+      flash[:error] = "Sorry, certificate not found."
+      redirect_to events_url
+    end
+  end
+
+  def show
+    @certificate = Certificate.find(params[:id])
+    if @certificate
+      respond_to do |format|
+        format.pdf do
+          send_data @certificate.generate.render, 
+            filename: "certificate_#{@certificate.event.to_param}_#{@certificate.user.identities.first.name}.pdf",
+            type: "application/pdf"
+        end
+      end
+    else
+      flash[:error] = "Sorry, certificate not found."
+      redirect_to root_url
+    end
+  end
+end

app/models/certificate.rb

@@ -0,0 +1,19 @@
+class Certificate < ActiveRecord::Base
+
+  belongs_to :user
+  belongs_to :event
+  validates :user_id, :presence => true
+  validates :event_id, :presence => true
+  before_save :generate_token
+
+  scope :going, where(:go => true)
+  scope :confirmed, where(:confirmed => true)
+
+	include GeneratePdf
+
+	private
+
+	def generate_token
+	  self.token = Digest::MD5.hexdigest("#{self.user.identities.first.name}-#{self.user.email}-#{self.event.name}-#{self.event.event_date}")
+  end
+end

app/models/event.rb

@@ -2,15 +2,27 @@ class Event < ActiveRecord::Base
   before_save :slugify
   validates :name, presence: true, uniqueness: true
   has_many :lectures, dependent: :destroy, order: 'relative_votes desc, negative_vote asc'
+  has_many :certificates, :dependent => :destroy
 
   def to_param
     slug
   end
+
+  def user_go?(user_id)
+    certificates.going.where(:user_id => user_id).any?
+  end
+
+  def going
+    certificates.going
+  end
+
+  def confirmed
+    certificates.confirmed
+  end
 
   private
   def slugify
     self.slug = name.parameterize.to_s
   end
-
 end
 

app/models/generate_pdf.rb

@@ -0,0 +1,30 @@
+# encoding: UTF-8
+module GeneratePdf
+  PDF_OPTIONS = {
+    :page_size => "A4",
+		:page_layout => :landscape,
+		:background  => "public/images/background.png",
+		:margin => [40, 75]
+  }
+
+  def	generate
+    attested = self
+		Prawn::Document.new(PDF_OPTIONS) do
+			move_down 50
+      text "Certificado de Participação", :size => 36, :style => :bold, :align => :center
+			move_down 30
+			text "Certificamos que", :size => 20, :align => :center
+			move_down 15
+			text "<b>#{attested.user.identities.first.name}</b>", :inline_format => true, :size => 30, :align => :center
+			move_down 15
+		  text "participou do <b>#{attested.event.name}</b>, realizado no(a) #{attested.event.place.upcase} em #{I18n.l(attested.event.event_date, :format => :long)} às #{attested.event.hour}, perfazendo uma carga horária total de <b>4 horas</b>.", 
+		        :inline_format => true, :size => 20, :align => :center
+	    move_down 30
+			text "Teresina(PI), #{I18n.l(Date.current, :format => :long)}.", :size => 20, :align => :center
+      move_down 50
+      text "Realização", :size => 16, :style => :bold, :align => :center
+      move_down 10
+      image "#{Rails.root}/public/images/logo.png", :position => :center
+    end
+	end
+end

app/views/certificates/_confirmed.html.erb

@@ -0,0 +1,10 @@
+<ul id="confirmed" class="certificate">
+	<% @event.confirmed.each do |certificate| %>
+		<li>
+			<div class="speaker">
+				<%= image_tag certificate.user.identities.first.image, :alt => certificate.user.identities.first.name, :class => "user_image photo" if certificate.user.identities.first.image %>
+				<%= label_tag nil, certificate.user.identities.first.name, :class => "user_name" %>
+			</div>
+		</li>
+	<% end %>
+</ul>

app/views/certificates/_form.html.erb

@@ -0,0 +1,9 @@
+<div class="blank">
+	<%= form_tag("/certificados", {:id => "certificate-form"}) do %>
+		<%= hidden_field :certificate, :user_id, :value => current_user.id %>
+		<%= hidden_field :certificate, :event_id, :value => @event.id %>
+		<div class="actions">
+			<%= button_tag "Eu Vou !", :class => "btn" %>
+		</div>
+	<% end %>
+</div>

app/views/certificates/_going.html.erb

@@ -0,0 +1,11 @@
+<ul id="going" class="certificate">
+	<% @event.going.each do |certificate| %>				
+		<li>
+			<div class="speaker">
+				<%= image_tag certificate.user.identities.first.image, :alt => certificate.user.identities.first.name, :class => "user_image photo" if certificate.user.identities.first.image %>
+				<%= label_tag nil, certificate.user.identities.first.name, :class => "user_name" %>
+				<%= link_to "Confirmar Presença", certificate_path(certificate), :method => :put, :class => "user_name" if permitted_to?(:update, :certificates) && !certificate.confirmed? %>
+			</div>
+		</li>
+	<% end %>
+</ul>

app/views/certificates/index.html.erb

@@ -0,0 +1,21 @@
+<h1 class="hat title">Meus Certificados</h1>
+
+<table>
+  <thead>
+    <th>Evento</th>
+    <th>Data do evento</th>
+    <th>Ação</th>
+  </thead>
+
+  <tbody>
+  <% @certificates.each do |certificate| %>
+    <tr>
+      <td>
+      	<%= link_to certificate.event.name, event_path(certificate.event) %>
+      </td>
+      <td><%=l certificate.event.event_date %></td>
+      <td><%= link_to image_tag("icn_pdf.gif", :title => "Gerar PDF"), certificate_path(certificate, :format => "pdf"), {:target => "_new"} %></td>
+    </tr>
+  <% end %>
+  </tbody>
+</table>

app/views/events/_form.html.erb

@@ -1,46 +1,26 @@
-<%= form_for(@event) do |f| %>
-  <% if @event.errors.any? %>
-    <div id="error_explanation">
-      <h2><%= pluralize(@event.errors.count, "error") %> prohibited this event from being saved:</h2>
-
-      <ul>
-      <% @event.errors.full_messages.each do |msg| %>
-        <li><%= msg %></li>
-      <% end %>
-      </ul>
-    </div>
-  <% end %>
-
-  <div class="field">
-    <%= f.label :name %><br />
-    <%= f.text_field :name %>
-  </div>
-  <div class="field">
-    <%= f.label :description %><br />
-    <%= f.text_area :description %>
-  </div>
-  <div class="field">
-    <%= f.label :event_date %><br />
-    <%= f.date_select :event_date %>
-  </div>
-  <div class="field">
-    <%= f.label :hour %><br />
-    <%= f.text_field :hour %>
-  </div>
-  <div class="field">
-    <%= f.label :place %><br />
-    <%= f.text_field :place %>
-  </div>
-  <div class="field">
-    <%= f.label :place_url, "URL da localização" %><br />
-    <%= f.text_field :place_url %>
-  </div>
-  <div class="field">
-    <%= f.label :enable_lectures, "Permitir palestras?" %><br />
-    <%= f.check_box :enable_lectures %>
-  </div>
-  <div class="actions">
-    <%= f.submit %>
-  </div>
-<% end %>
-
+<div id="formulario">
+	<%= form_for(@event) do |f| %>
+  		<% if @event.errors.any? %>
+    		<div id="error_explanation">
+      			<h2><%= pluralize(@event.errors.count, "error") %> prohibited this event from being saved:</h2>
+      			<ul>
+      				<% @event.errors.full_messages.each do |msg| %>
+        			<li><%= msg %></li>
+      				<% end %>
+      			</ul>
+    		</div>
+  		<% end %>
+		<%= f.text_field :name, :placeholder => "Nome:" %>
+    	<%= f.text_area :description, :placeholder => "Descrição:" %>
+    	<%= f.label :event_date %><br />
+    	<%= f.date_select :event_date %><br />
+  		<%= f.text_field :hour, :placeholder => "Horário:" %>
+    	<%= f.text_field :place, :placeholder => "Local:" %>
+   		<%= f.text_field :place_url, :placeholder => "URL da localização:" %>
+    	<%= f.label :enable_lectures, "Permitir palestras?" %>
+    	<%= f.check_box :enable_lectures %>
+		<div class="actions">
+			<%= button_tag "Enviar"%>
+		<div>
+	<% end %>
+</div>

app/views/events/edit.html.erb

@@ -1,6 +1,4 @@
-<h1>Editing event</h1>
-
+<h1 class="hat title">Alterando Evento</h1>
 <%= render 'form' %>
-
-<%= link_to 'Show', @event %> |
-<%= link_to 'Back', events_path %>
+<%= link_to 'Visualizar', @event, :class => "btn" %>
+<%= link_to 'Voltar', events_path, :class => "btn" %>

app/views/events/new.html.erb

@@ -1,5 +1,3 @@
-<h1>New event</h1>
-
+<h1 class="hat title">Novo Evento</h1>
 <%= render 'form' %>
-
-<%= link_to 'Back', events_path %>
+<%= link_to 'Cancelar', events_path, :class => 'btn' %>