From bc1aef49990daf501c9b00dcf5e0aff65b1c4937 Mon Sep 17 00:00:00 2001
From: Maxwell Salzberg <maxwell@joindiaspora.com>
Date: Fri, 16 Sep 2011 18:19:34 -0700
Subject: [PATCH] MS IZ start to implement followed tags in the stream

---
 app/controllers/tag_followings_controller.rb  |  6 ++
 app/helpers/stream_helper.rb                  |  2 +
 app/views/aspects/index.html.haml             |  4 +-
 config/routes.rb                              |  3 +
 lib/tag_stream.rb                             | 66 +++++++++++++++++++
 .../tag_followings_controller_spec.rb         | 15 ++++-
 6 files changed, 93 insertions(+), 3 deletions(-)
 create mode 100644 lib/tag_stream.rb

diff --git a/app/controllers/tag_followings_controller.rb b/app/controllers/tag_followings_controller.rb
index fab373942..f28f02486 100644
--- a/app/controllers/tag_followings_controller.rb
+++ b/app/controllers/tag_followings_controller.rb
@@ -1,6 +1,12 @@
+require File.join(Rails.root, '/lib/tag_stream')
 class TagFollowingsController < ApplicationController
   before_filter :authenticate_user!
 
+  def index
+    @stream = TagStream.new(current_user)
+
+    render 'aspects/index', :locals => {:posts => @stream.posts}
+  end
   # POST /tag_followings
   # POST /tag_followings.xml
   def create
diff --git a/app/helpers/stream_helper.rb b/app/helpers/stream_helper.rb
index 56133a90e..bcb16a112 100644
--- a/app/helpers/stream_helper.rb
+++ b/app/helpers/stream_helper.rb
@@ -10,6 +10,8 @@ module StreamHelper
       "/apps/1?#{{:max_time => @posts.last.created_at.to_i}.to_param}"
     elsif controller.instance_of?(PeopleController)
       person_path(@person, :max_time => @posts.last.created_at.to_i)
+    elsif controller.instance_of?(TagFollowingsController) 
+      tag_followings_path(:max_time => @stream.posts.last.created_at.to_i)
     elsif controller.instance_of?(AspectsController)
       aspects_path(:max_time => @stream.posts.last.send(@stream.order.to_sym).to_i, :a_ids => @stream.aspect_ids)
     else
diff --git a/app/views/aspects/index.html.haml b/app/views/aspects/index.html.haml
index e3b7ca651..d2b59a43f 100644
--- a/app/views/aspects/index.html.haml
+++ b/app/views/aspects/index.html.haml
@@ -26,9 +26,9 @@
 
 .span-13.append-1
   #aspect_stream_container.stream_container
-    = render 'aspect_stream', :stream => @stream
+    = render 'aspects/aspect_stream', :stream => @stream
 
 .span-5.rightBar.last
-  = render 'selected_contacts', :stream => @stream
+  = render 'aspects/selected_contacts', :stream => @stream
 
   = render 'shared/right_sections'
diff --git a/config/routes.rb b/config/routes.rb
index e0381e15a..7fa599576 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -51,6 +51,9 @@ Diaspora::Application.routes.draw do
     post   "tag_followings" => "tag_followings#create", :as => 'tag_tag_followings'
     delete "tag_followings" => "tag_followings#destroy"
   end
+
+  # get "tag_followings" => "tag_followings#index", :as => 'tag_followings'
+
   get 'tags/:name' => 'tags#show', :as => 'tag'
 
   resources :apps, :only => [:show]
diff --git a/lib/tag_stream.rb b/lib/tag_stream.rb
new file mode 100644
index 000000000..3ec31f303
--- /dev/null
+++ b/lib/tag_stream.rb
@@ -0,0 +1,66 @@
+#   Copyright (c) 2010-2011, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
+
+class TagStream 
+
+  attr_reader :max_time, :order
+
+  # @param user [User]
+  # @param inputted_aspect_ids [Array<Integer>] Ids of aspects for given stream
+  # @param aspect_ids [Array<Integer>] Aspects this stream is responsible for
+  # @opt max_time [Integer] Unix timestamp of stream's post ceiling
+  # @opt order [String] Order of posts (i.e. 'created_at', 'updated_at')
+  # @return [void]
+  def initialize(user, opts={})
+    @tags = user.followed_tags
+    @tag_string = @tags.join(', '){|tag| tag.name}.to_sym
+    @user = user
+    @max_time = opts[:max_time]
+    @order = opts[:order]
+  end
+
+  # Filters aspects given the stream's aspect ids on initialization and the user.
+  # Will disclude aspects from inputted aspect ids if user is not associated with their
+  # target aspects.
+  #
+  # @return [ActiveRecord::Association<Aspect>] Filtered aspects given the stream's user
+  def aspects
+    [@tag_string]
+  end
+
+  # Maps ids into an array from #aspects
+  #
+  # @return [Array<Integer>] Aspect ids
+  def aspect_ids
+    [] 
+  end
+
+  # @return [ActiveRecord::Association<Post>] AR association of posts
+  def posts
+    # NOTE(this should be something like Post.all_for_stream(@user, aspect_ids, {}) that calls visible_posts
+    @posts ||= StatusMessage.tagged_with([@tag_string], :any => true)
+             
+          
+  end
+
+  # @return [ActiveRecord::Association<Person>] AR association of people within stream's given aspects
+  def people
+    @people ||= posts.map{|p| p.author}.uniq 
+  end
+
+  # The first aspect in #aspects, given the stream is not for all aspects, or #aspects size is 1
+  # @note aspects.first is used for mobile. NOTE(this is a hack and should be fixed)
+  # @return [Aspect,Symbol]
+  def aspect
+   @tags_string
+  end
+
+  # Determine whether or not the stream is displaying across
+  # all of the user's aspects.
+  #
+  # @return [Boolean]
+  def for_all_aspects?
+    true
+  end
+end
diff --git a/spec/controllers/tag_followings_controller_spec.rb b/spec/controllers/tag_followings_controller_spec.rb
index d1619564b..374abe0b3 100644
--- a/spec/controllers/tag_followings_controller_spec.rb
+++ b/spec/controllers/tag_followings_controller_spec.rb
@@ -15,7 +15,20 @@ describe TagFollowingsController do
     sign_in :user, bob
   end
 
-  describe "POST create" do
+  describe 'index' do
+
+    it 'assings new TagStream' do
+      get :index
+      assigns[:stream].should be_a TagStream
+    end
+
+    it 'renders a view' do
+      get :index
+      response.body.should_not be_blank
+    end
+  end
+
+  describe "create" do
     describe "with valid params" do
       it "creates a new TagFollowing" do
         expect {