Tidied POI descriptions for Layar: truncate where necessary, strip HTML, decode HTML entities

Gemfile

@@ -41,3 +41,4 @@ gem 'bson_ext'
 gem 'haml-rails'
 gem 'mm-multi-parameter-attributes'
 gem 'feedzirra'
+gem 'htmlentities'

Gemfile.lock

@@ -61,6 +61,7 @@ GEM
       haml (~> 3.0)
       railties (~> 3.0)
     hike (1.2.1)
+    htmlentities (4.3.1)
     i18n (0.6.0)
     journey (1.0.4)
     jquery-rails (2.0.2)
@@ -142,6 +143,7 @@ DEPENDENCIES
   coffee-rails (~> 3.2.1)
   feedzirra
   haml-rails
+  htmlentities
   jquery-rails
   mm-multi-parameter-attributes
   mongo_mapper

app/helpers/posts_helper.rb

@@ -13,7 +13,7 @@ module PostsHelper
       },
       :text => {
         :title =>       post.title,
-        :description => post.summary,
+        :description => clean_description(post.summary),
         :footnote =>    "From #{post.feed.title}"
       },
       :actions => [
@@ -27,4 +27,13 @@ module PostsHelper
       ]
     }
   end
+  
+  def clean_description(s)
+    if s.size > 137
+      s = s[0..136] + '...'
+    end
+    
+    coder = HTMLEntities.new
+    coder.decode(s.gsub(/<.+?>/, ''))
+  end
 end