1 files changed, 34 insertions, 0 deletions
diff --git a/ext/json/lib/json/add/date.rb b/ext/json/lib/json/add/date.rb
new file mode 100644
index 0000000000..4288237db1
--- /dev/null
+++ b/ext/json/lib/json/add/date.rb
@@ -0,0 +1,34 @@
+unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
+  require 'json'
+end
+require 'date'
+
+# Date serialization/deserialization
+class Date
+
+  # Deserializes JSON string by converting Julian year <tt>y</tt>, month
+  # <tt>m</tt>, day <tt>d</tt> and Day of Calendar Reform <tt>sg</tt> to Date.
+  def self.json_create(object)
+    civil(*object.values_at('y', 'm', 'd', 'sg'))
+  end
+
+  alias start sg unless method_defined?(:start)
+
+  # Returns a hash, that will be turned into a JSON object and represent this
+  # object.
+  def as_json(*)
+    {
+      JSON.create_id => self.class.name,
+      'y' => year,
+      'm' => month,
+      'd' => day,
+      'sg' => start,
+    }
+  end
+
+  # Stores class name (Date) with Julian year <tt>y</tt>, month <tt>m</tt>, day
+  # <tt>d</tt> and Day of Calendar Reform <tt>sg</tt> as JSON string
+  def to_json(*args)
+    as_json.to_json(*args)
+  end
+end