refactored login process, added remember option for login

app/assets/stylesheets/specific/sessions.css.scss

@@ -1,14 +1,11 @@
 @import "../common/000_vars.css.scss";
 
-div#sessions {
-  div#new {
-    section {
-      width: 30em;
-      float: left;
-    }
-  
-    h1 {
-      font-size: $h2_size;
+div#c-sessions {
+  div#a-new {
+    label#remember-label {
+      display: inline;
+      font-weight: normal;
+      font-style: italic;
     }
   }
 }

app/controllers/application_controller.rb

@@ -31,20 +31,8 @@ protected
   end
 
   def set_current_user
-    if session[:user_id]
-      CurrentUser.user = User.find_by_id(session[:user_id])
-      CurrentUser.ip_addr = request.remote_ip
-    end
-    
-    if CurrentUser.user
-      if CurrentUser.user.is_banned? && CurrentUser.user.ban && CurrentUser.user.ban.expires_at < Time.now
-        CurrentUser.user.unban!
-      end
-    else
-      CurrentUser.user = AnonymousUser.new
-    end
-
-    Time.zone = CurrentUser.user.time_zone
+    session_loader = SessionLoader.new(session, cookies, request)
+    session_loader.load
   end
   
   def reset_current_user

app/controllers/sessions_controller.rb

@@ -4,10 +4,9 @@ class SessionsController < ApplicationController
   end
   
   def create
-    if User.authenticate(params[:name], params[:password])
-      @user = User.find_by_name(params[:name])
-      @user.update_column(:last_logged_in_at, Time.now)
-      session[:user_id] = @user.id
+    session_creator = SessionCreator.new(session, cookies, params[:name], params[:password], params[:remember])
+    
+    if session_creator.authenticate
       redirect_to(params[:url] || session[:previous_uri] || posts_path, :notice => "You are now logged in.")
     else
       redirect_to(new_session_path, :notice => "Password was incorrect.")

app/logical/session_creator.rb

@@ -0,0 +1,28 @@
+class SessionCreator
+  attr_reader :session, :cookies, :name, :password, :remember
+  
+  def initialize(session, cookies, name, password, remember)
+    @session = session
+    @cookies = cookies
+    @name = name
+    @password = password
+    @remember = remember
+  end
+  
+  def authenticate
+    if User.authenticate(name, password)
+      user = User.find_by_name(name)
+      user.update_column(:last_logged_in_at, Time.now)
+      
+      if remember.present?
+        cookies[:user_name] = {:expires => 1.year.from_now, :value => user.name}
+        cookies[:cookie_password_hash] = {:expires => 1.year.from_now, :value => user.cookie_password_hash}
+      end
+      
+      session[:user_id] = user.id
+      return true
+    else
+      return false
+    end
+  end
+end

app/logical/session_loader.rb

@@ -0,0 +1,51 @@
+class SessionLoader
+  attr_reader :session, :cookies, :request
+  
+  def initialize(session, cookies, request)
+    @session = session
+    @cookies = cookies
+    @request = request
+  end
+  
+  def load
+    if session[:user_id]
+      load_session_user
+    elsif cookie_password_hash_valid?
+      load_cookie_user
+    end
+    
+    if CurrentUser.user
+      CurrentUser.user.unban! if ban_expired?
+    else
+      CurrentUser.user = AnonymousUser.new
+    end
+
+    set_time_zone
+  end
+
+private
+  
+  def load_session_user
+    CurrentUser.user = User.find_by_id(session[:user_id])
+    CurrentUser.ip_addr = request.remote_ip
+  end
+  
+  def load_cookie_user
+    CurrentUser.user = User.find_by_name(cookies[:user_name])
+    CurrentUser.ip_addr = request.remote_ip
+  end
+  
+  def ban_expired?
+    CurrentUser.user.is_banned? && CurrentUser.user.ban && CurrentUser.user.ban.expired?
+  end
+  
+  def cookie_password_hash_valid?
+    puts "cookie_password_hash=#{cookies[:cookie_password_hash]}"
+    cookies[:cookie_password_hash] && User.authenticate_cookie_hash(cookies[:user_name], cookies[:cookie_password_hash])
+  end
+  
+  def set_time_zone
+    Time.zone = CurrentUser.user.time_zone
+  end
+end
+

app/models/ban.rb

@@ -54,4 +54,8 @@ class Ban < ActiveRecord::Base
   def duration
     @duration
   end
+  
+  def expired?
+    expires_at < Time.now
+  end
 end

app/models/user.rb

@@ -139,16 +139,36 @@ class User < ActiveRecord::Base
   end
   
   module AuthenticationMethods
-    def authenticate(name, pass)
-      authenticate_hash(name, sha1(pass))
+    extend ActiveSupport::Concern
+    
+    module ClassMethods
+      def authenticate(name, pass)
+        authenticate_hash(name, sha1(pass))
+      end
+
+      def authenticate_hash(name, hash)
+        where(["lower(name) = ? AND password_hash = ?", name.downcase, hash]).first != nil
+      end
+    
+      def authenticate_cookie_hash(name, hash)
+        user = User.find_by_name(name)
+        return nil if user.nil?
+        return hash == user.cookie_password_hash
+      end
+
+      def sha1(pass)
+        Digest::SHA1.hexdigest("#{Danbooru.config.password_salt}--#{pass}--")
+      end
     end
 
-    def authenticate_hash(name, pass)
-      where(["lower(name) = ? AND password_hash = ?", name.downcase, pass]).first != nil
-    end
-
-    def sha1(pass)
-      Digest::SHA1.hexdigest("#{Danbooru.config.password_salt}--#{pass}--")
+    def cookie_password_hash
+      hash = password_hash
+      
+      (name.size + 8).times do
+        hash = User.sha1(hash)
+      end
+      
+      return hash
     end
   end
   
@@ -354,7 +374,7 @@ class User < ActiveRecord::Base
   include BanMethods
   include NameMethods
   include PasswordMethods
-  extend AuthenticationMethods
+  include AuthenticationMethods
   include FavoriteMethods
   include LevelMethods
   include EmailMethods

app/views/sessions/new.html.erb

@@ -13,6 +13,9 @@
         <div class="input">
           <label for="password">Password</label>
           <%= password_field_tag :password %>
+          
+          <%= check_box_tag :remember %>
+          <label for="remember" id="remember-label">Remember</label>
         </div>
         
         <div class="input">

db/development_structure.sql

@@ -2433,7 +2433,8 @@ CREATE TABLE uploads (
     post_id integer,
     md5_confirmation character varying(255),
     created_at timestamp without time zone,
-    updated_at timestamp without time zone
+    updated_at timestamp without time zone,
+    backtrace text
 );
 
 

test/unit/user_test.rb

@@ -174,6 +174,20 @@ class UserTest < ActiveSupport::TestCase
       end
     end
     
+    context "cookie password hash" do
+      setup do
+        @user = Factory.create(:user, :password_hash => "1234")
+      end
+      
+      should "be correct" do
+        assert_equal("8ac3b1d04bdb95ba92f9e355897c880e0d88ac5a", @user.cookie_password_hash)
+      end
+      
+      should "validate" do
+        assert(User.authenticate_cookie_hash(@user.name, "8ac3b1d04bdb95ba92f9e355897c880e0d88ac5a"))
+      end
+    end
+    
     context "password" do
       should "match the confirmation" do
         @user = Factory.create(:user)