FEATURE: Can edit category/host relationships for embedding

app/models/embeddable_host.rb

@@ -0,0 +1,24 @@
+class EmbeddableHost < ActiveRecord::Base
+  validates_format_of :host, :with => /\A[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?(\/.*)?\Z/i
+  belongs_to :category
+
+  before_validation do
+    self.host.sub!(/^https?:\/\//, '')
+    self.host.sub!(/\/.*$/, '')
+  end
+
+  def self.record_for_host(host)
+    uri = URI(host) rescue nil
+    return false unless uri.present?
+
+    host = uri.host
+    return false unless host.present?
+
+    where("lower(host) = ?", host).first
+  end
+
+  def self.host_allowed?(host)
+    record_for_host(host).present?
+  end
+
+end