Account activation.

When a user creates an account, they are sent an activation email.
This email contains link which, when clicked, activates the user and
logs them in.

app/controllers/users_controller.rb

@@ -1,6 +1,6 @@
 class UsersController < ApplicationController
   layout "application"
-  before_filter :authenticate_user, :except => [:new, :create]
+  before_filter :authenticate_user, :except => [:new, :create, :activate]
 
   def index
     @users = User.all
@@ -38,15 +38,35 @@ def new
   def create
     @user = User.new(params[:user])
 
-    if @user.save
-      flash[:notice] = 'Registration successful.'
+    # Saving without session maintenance to skip
+    # auto-login which can't happen here because
+    # the User has not yet been activated
+    if @user.save_without_session_maintenance
+      @user.deliver_activation_instructions
+      flash[:notice] = 'Registration successful. Please check your email to activate your account.'
       redirect_to shares_path
     else
       flash[:error] = 'Registration failed. Please try again.'
       redirect_to root_path
     end
   end
-
+
+
+  def activate
+    @user = User.find_using_perishable_token(params[:token], 0) # Token does not expire.
+    if !@user
+      redirect_to root_url
+    else
+      if !@user.active?
+        @user.activated = true
+        @user.save
+        UserSession.create(@user) # Log the user in.
+        flash[:notice] = 'Account activated successfully.'
+      end
+
+      redirect_to shares_path
+    end
+  end
 
   def edit
     @user = current_user

app/models/activation_mailer.rb

@@ -0,0 +1,11 @@
+class ActivationMailer < ActionMailer::Base
+
+  def activation_instructions(user, sent_at = Time.now)
+    from          "A-List Account Activation <[email protected]>"
+    reply_to      "[email protected]"
+    recipients    user.email
+    subject       "Activate Your A-List Account"
+    body          :account_activation_url => activate_url(user.perishable_token)
+  end
+
+end

app/models/user.rb

@@ -28,4 +28,10 @@ def unread_shares
   def shares_from(submitter)
     shares.select {|s| s.link.submitter == submitter }
   end
+
+  def deliver_activation_instructions
+    reset_perishable_token!
+    ActivationMailer.deliver_activation_instructions(self)
+  end
+
 end

app/views/activation_mailer/activation_instructions.erb

@@ -0,0 +1,5 @@
+Thank you for creating an A-List account! Click the URL below to activate your account.
+
+<%= @account_activation_url %>
+
+If the above URL does not work try copying and pasting it into your browser. If you continue to have problem, please feel free to contact us.

app/views/activation_mailer/activation_instructions.text.html.erb

@@ -0,0 +1,5 @@
+<p>Thank you for creating an A-List account! Click the URL below to activate your account.</p>
+
+<p><%= link_to "Activate", @account_activation_url %></p>
+
+<p>If the above URL does not work try copying and pasting it into your browser. If you continue to have problem, please feel free to contact us.</p>

app/views/activation_mailer/activation_instructions.text.plain.erb

@@ -0,0 +1,5 @@
+Thank you for creating an A-List account! Click the URL below to activate your account.
+
+<%= link_to "Activate", @account_activation_url %>
+
+If the above URL does not work try copying and pasting it into your browser. If you continue to have problem, please feel free to contact us.

app/views/user_sessions/new.html.erb

@@ -1,7 +1,7 @@
 <h1>Log In</h1>
 
 <% form_for @user_session do |f| %>
-  <%= f.error_messages %>
+  <%= f.error_messages :header_message => "", :message => "Problem logging in:" %>
   <p>
     <%= f.label :email %><br />
     <%= f.text_field :email %>

config/routes.rb

@@ -1,8 +1,9 @@
 ActionController::Routing::Routes.draw do |map|
-  map.log_in "log_in", :controller => "user_sessions", :action => "new"
-  map.log_out "log_out", :controller => "user_sessions", :action => "destroy"
+  map.log_in "/log_in", :controller => "user_sessions", :action => "new"
+  map.log_out "/log_out", :controller => "user_sessions", :action => "destroy"
 
   map.connect "/users/friends", :controller => "users", :action => "friends"
+  map.activate "/users/activate/:token", :controller => "users", :action => "activate"
 
   map.resources :shares
   map.resources :links

public/stylesheets/application.css

@@ -33,6 +33,15 @@ a:hover {
     color: #000;
 }
 
+#errorExplanation {
+    color: #CC0000;
+}
+
+
+#errorExplanation ul {
+    list-style: disc;
+}
+
 #main {
     background: #FCFCFC;
     max-width: 1000px;

test/fixtures/activation_mailer/activation_instructions

@@ -0,0 +1,3 @@
+ActivationMailer#activation_instructions
+
+Find me in app/views/activation_mailer/activation_instructions.erb

test/unit/activation_mailer_test.rb

@@ -0,0 +1,12 @@
+require 'test_helper'
+
+class ActivationMailerTest < ActionMailer::TestCase
+  test "activation_instructions" do
+    @expected.subject = 'ActivationMailer#activation_instructions'
+    @expected.body    = read_fixture('activation_instructions')
+    @expected.date    = Time.now
+
+    assert_equal @expected.encoded, ActivationMailer.create_activation_instructions(@expected.date).encoded
+  end
+
+end