Create new feeds in the context of a specified layer

app/controllers/feeds_controller.rb

@@ -44,11 +44,27 @@ class FeedsController < ApplicationController
   # POST /feeds
   # POST /feeds.json
   def create
-    @feed = Feed.new(params[:feed])
+    
+
+    Rails.logger.debug "Feed URL: %s" % params['feed']['feed_url']
+
+    if Feed.where(:feed_url => params['feed']['feed_url']).size == 1 # ensure this test returns the values we expect
+      Rails.logger.debug "Adding existing feed to a new layer"
+      @feed = Feed.where(:feed_url => params['feed']['feed_url']).first
+      @layer = Layer.find(params['feed']['new_layer_id']) # assumes that the specified layer exists
+      # Attach the existing feed to the specified layer (making sure we only add each one once)
+      @feed.layers << @layer unless @feed.layers.include?(@layer)
+    else
+      # Create a new feed
+      Rails.logger.debug "Creating a new feed"
+      @feed = Feed.new(params[:feed])
+      @layer = Layer.find(params['feed']['new_layer_id']) # assumes that the specified layer exists
+      @feed.layers << @layer unless @feed.layers.include?(@layer)
+    end
 
     respond_to do |format|
       if @feed.save
-        format.html { redirect_to '/', notice: 'Feed added OK' }
+        format.html { redirect_to @layer, notice: 'Feed added OK' }
         format.json { render json: @feed, status: :created, location: @feed }
       else
         format.html { render action: "new" }

app/models/feed.rb

@@ -2,6 +2,7 @@ class Feed < ActiveRecord::Base
   has_many :posts, :dependent => :destroy
   has_and_belongs_to_many :layers
   attr_accessible :title, :url, :description, :generator, :last_fetched, :feed_url
+  attr_accessor :new_layer_id # non model attribute used when creating new feeds from within a layer
 
   validates_format_of :feed_url, :with => URI::regexp(%w(http https)), :message => "must be a valid URL"
   

app/views/feeds/_form.html.haml

@@ -15,6 +15,7 @@
   .field
     = f.label "URL"
     = f.text_field :feed_url, :size => 120
+    = f.hidden_field :new_layer_id, :value => @feed.new_layer_id
     = f.submit 'Save', :id => 'submit'
   -#
     .field