Generate unique layer names for Layar

app/controllers/posts_controller.rb

@@ -9,9 +9,10 @@ class PostsController < ApplicationController
 #       :params => params,
 #       :pois_returned => @posts.size
 #     )
+    @layer = Layer.find(params[:layer_id])
 
     layar_response = {
-      :layer =>         'hyparlocal',
+      :layer =>         @layer.layar_name,
       :hotspots =>      @posts.collect { |p| post_to_poi(p) },
       :errorCode =>     0, # OK
       :errorString =>   "OK",

app/models/layer.rb

@@ -1,4 +1,9 @@
 class Layer < ActiveRecord::Base
   attr_accessible :name
   has_and_belongs_to_many :feeds
+
+  # Unique name for Layar layer
+  def layar_name
+  	"apollo" + self.name.strip.downcase.gsub(/[^a-z0-9]/, '')
+  end
 end

app/views/layers/show.html.haml

@@ -5,7 +5,9 @@
 %p
   API URL:
   = "#{request.protocol}#{request.host_with_port}/posts/near.layar?layer_id=#{@layer.id}"
-  
+  %br
+  Layar layer name:
+  = @layer.layar_name
 
 %h2 Feeds