adding friends

git-svn-id: http://svn.barleysodas.com/barleysodas/trunk@116 0f7b21a7-9e3a-4941-bbeb-ce5c7c368fa7

app/controllers/friends_controller.rb

@@ -0,0 +1,49 @@
+class FriendsController < ApplicationController
+  append_before_filter :fetch_people, :only => [ :show, :destroy ]
+  
+  # GET /friends/1
+  # GET /friends/1.xml
+  def show
+    @content_title = "Friends of #{@people.title}"
+    @friends = @people.actual_friends
+    respond_to do |format|
+      format.html # show.rhtml
+      format.xml  { render :xml => @friends.to_xml }
+    end
+  end
+  
+  # POST /friends
+  # POST /friends.xml
+  def create
+    @friend = Friend.new(params[:friend])
+    respond_to do |format|
+      if @friend.save
+        flash[:notice] = 'Successfully added the new friend'
+        format.html { redirect_to people_path(@people.page.title_for_url) }
+      else
+        format.html { render :action => "new" }
+      end
+    end
+  end
+  
+  # DELETE /friends/1
+  # DELETE /friends/1.xml
+  def destroy
+    @friend = Friend.find :first,
+      :conditions => [ 'source_id = ? AND destination_id = ?',
+      params[:d].to_i, @people.id ]
+    @friend.destroy if @friend
+    respond_to do |format|
+      flash[:notice] = 'Removed the friend'
+      format.html { redirect_to people_path(@people.page.title_for_url) }
+    end
+  end
+  
+  protected
+  
+  def fetch_people
+    @people = People.find_by_title(Page.title_from_url(params[:id]))
+    raise ActiveRecord::RecordNotFound.new if @people.nil?
+    @page = @people.page
+  end
+end

app/helpers/friends_helper.rb

@@ -0,0 +1,3 @@
+module FriendsHelper
+  include PeoplesHelper
+end

app/helpers/peoples_helper.rb

@@ -12,4 +12,21 @@ module PeoplesHelper
     link_to 'Edit People', edit_people_path(people.page.title_for_url),
       { :title => "Edit #{people.title}" }
   end
+  
+  def show_friends_link(people)
+    link_to "#{people.title}'s Friends (#{people.actual_friends.size})",
+      friend_path(people.page.title_for_url)
+  end
+  
+  def add_friend_link(people)
+    link_to "#{image_tag('list-add.png')} Friend",
+      friends_path('friend[source_id]' => session[:people_id],
+      'friend[destination_id]' => people.id), :method => :post
+  end
+  
+  def remove_friend_link(people)
+    link_to "#{image_tag('list-remove.png')} Friend",
+      friend_url(:id => people.page.title_for_url, :d => session[:people_id]),
+      :method => :delete
+  end
 end

app/models/friend.rb

@@ -0,0 +1,16 @@
+##
+# Represents a relationship of association between two People models.
+#
+class Friend < ActiveRecord::Base
+  belongs_to :source, :class_name => 'People', :foreign_key => :source_id
+  belongs_to :destination, :class_name => 'People',
+    :foreign_key => :destination_id
+  validates_presence_of :source_id, :destination_id
+  validates_uniqueness_of :destination_id, :scope => :source_id
+  
+  validates_each :destination_id do |record, attr, value|
+    if value == record.source_id
+      record.errors.add(attr, 'cannot be the same as the source')
+    end
+  end
+end

app/models/people.rb

@@ -10,11 +10,21 @@ class People < ActiveRecord::Base
   has_many :images, :dependent => :destroy
   has_many_tagged_images
   validates_uniqueness_of :title
+  has_many :friends, :foreign_key => :source_id, :dependent => :destroy
+  has_many :actual_friends, :through => :friends, :source => :destination
   
   make_authenticatable
   validates_length_of :password, :minimum => 8, :if => :password_required?,
     :message => 'must be at least 8 characters in length'
   
+  ##
+  # Used to quickly determine if the particular id of another Person is a
+  # Friend of this instance.
+  #
+  def friend_of?(people_id)
+    Friend.count([ 'source_id = ? AND destination_id = ?', people_id, id ]) > 0
+  end
+  
   ##
   # Finds me.
   #

app/views/friends/show.rhtml

@@ -0,0 +1,7 @@
+<% for friend in @friends do -%>
+  <div class="friend_box"><%= link_to friend.title, people_path(friend.page.title_for_url) -%></div>
+<% end -%>
+
+<% content_for :sidebar do -%>
+  <%= show_people_link(@people) -%><br />
+<% end -%>

app/views/peoples/show.rhtml

@@ -7,4 +7,7 @@
   <%= edit_people_link(@people) %><br />
   <%= link_to 'Destroy', people_path(@people.page.title_for_url), :confirm => 'Are you sure?', :method => :delete %><br />
   <% unless @people.tagged_images.empty? -%><%= tagged_image_browser_link -%><br /><% end -%>
+  <%= show_friends_link(@people) -%><br />
+  <% unless @people.id == session[:people_id] or @people.friend_of?(session[:people_id]) -%><%= add_friend_link(@people) -%><% end -%>
+  <% if @people.friend_of?(session[:people_id]) -%><%= remove_friend_link(@people) -%><% end -%>
 <% end -%>

config/routes.rb

@@ -1,8 +1,6 @@
 ActionController::Routing::Routes.draw do |map|
-  map.resources :tag_images
-
   map.resources :beers, :breweries, :pages, :discussions, :peoples, :roles,
-    :sessions, :styles, :galleries, :tag_images
+    :sessions, :styles, :galleries, :tag_images, :friends
 
   map.connect ':controller/:action/:id.:format'
   map.connect ':controller/:action/:id'

db/migrate/013_create_friends.rb

@@ -0,0 +1,16 @@
+class CreateFriends < ActiveRecord::Migration
+  def self.up
+    create_table :friends do |t|
+      t.column :source_id, :integer
+      t.column :destination_id, :integer
+      t.column :rank, :integer
+      t.column :created_at, :timestamp
+    end
+    add_index :friends, :source_id
+    add_index :friends, :destination_id
+  end
+
+  def self.down
+    drop_table :friends
+  end
+end

generate_permissions

@@ -5,7 +5,7 @@ base_actions = ApplicationController.action_methods
 # rather than defining them here.
 controllers = [ PagesController, DiscussionsController, StylesController,
   PeoplesController, BeersController, BreweriesController, RolesController,
-  GalleriesController, TagImagesController ]
+  GalleriesController, TagImagesController, FriendsController ]
 controllers.each do |c|  
   actions = c.action_methods - base_actions
   cname = c.controller_name
@@ -33,6 +33,11 @@ Permission.find(:all,
   next if [ 'show', 'create', 'destroy', 'taggable_search' ].include?(p.action)
   r.permissions << p
 end
+Permission.find(:all,
+  :conditions => [ 'controller = ?', 'friends' ]).each do |p|
+  next if [ 'edit', 'create', 'destroy' ].include?(p.action)
+  r.permissions << p
+end
 
 r2 = Role.admin_role
 Permission.find(:all).each do |p|

public/stylesheets/content.css

@@ -256,7 +256,7 @@
 }
 
 /* People uploaded Image styling */
-#content .people_image {
+#content .people_image, #content .friend_box {
   border: 1px solid #DDD;
   background-color: #F2F2F2;
   float: left;

test/fixtures/friends.yml

@@ -0,0 +1,5 @@
+# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
+one:
+  id: 1
+two:
+  id: 2

test/functional/friends_controller_test.rb

@@ -0,0 +1,57 @@
+require File.dirname(__FILE__) + '/../test_helper'
+require 'friends_controller'
+
+# Re-raise errors caught by the controller.
+class FriendsController; def rescue_action(e) raise e end; end
+
+class FriendsControllerTest < Test::Unit::TestCase
+  fixtures :friends
+
+  def setup
+    @controller = FriendsController.new
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+  end
+
+  def test_should_get_index
+    get :index
+    assert_response :success
+    assert assigns(:friends)
+  end
+
+  def test_should_get_new
+    get :new
+    assert_response :success
+  end
+  
+  def test_should_create_friend
+    old_count = Friend.count
+    post :create, :friend => { }
+    assert_equal old_count+1, Friend.count
+    
+    assert_redirected_to friend_path(assigns(:friend))
+  end
+
+  def test_should_show_friend
+    get :show, :id => 1
+    assert_response :success
+  end
+
+  def test_should_get_edit
+    get :edit, :id => 1
+    assert_response :success
+  end
+  
+  def test_should_update_friend
+    put :update, :id => 1, :friend => { }
+    assert_redirected_to friend_path(assigns(:friend))
+  end
+  
+  def test_should_destroy_friend
+    old_count = Friend.count
+    delete :destroy, :id => 1
+    assert_equal old_count-1, Friend.count
+    
+    assert_redirected_to friends_path
+  end
+end

test/unit/friend_test.rb

@@ -0,0 +1,10 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class FriendTest < Test::Unit::TestCase
+  fixtures :friends
+
+  # Replace this with your real tests.
+  def test_truth
+    assert true
+  end
+end