added datacenters models

lib/fog/compute/linode.rb

@@ -15,6 +15,8 @@ module Fog
       collection :servers
       model :kernel
       collection :kernels
+      model :data_center
+      collection :data_centers
 
       request_path 'fog/compute/requests/linode'
       request :avail_datacenters

lib/fog/compute/models/linode/data_center.rb

@@ -0,0 +1,12 @@
+require 'fog/core/model'
+
+module Fog
+  module Linode
+    class Compute
+      class DataCenter < Fog::Model
+        identity :id
+        attribute :location
+      end
+    end
+  end
+end

lib/fog/compute/models/linode/data_centers.rb

@@ -0,0 +1,26 @@
+require 'fog/core/collection'
+require 'fog/compute/models/linode/data_center'
+
+module Fog
+  module Linode
+    class Compute
+      class DataCenters < Fog::Collection
+        model Fog::Linode::Compute::DataCenter
+
+        def all
+          load datacenters
+        end
+
+        private
+        def datacenters(id=nil)
+          connection.avail_datacenters.body['DATA'].tap { |data| map_datacenters data }
+        end
+        
+        def map_datacenters(datacenters)
+          datacenters.map! { |datacenter| datacenter.each_with_object({}) { |(k, v), h| h[k.downcase.to_sym] = v  }  }
+          datacenters.each { |datacenter| datacenter.merge! :id => datacenter[:datacenterid], :name => datacenter[:location] }
+        end
+      end
+    end
+  end
+end