add class to resolve object from path.

1 files changed, 31 insertions, 0 deletions

diff --git a/app/assets/javascripts/lib/proxy.js.coffee b/app/assets/javascripts/lib/proxy.js.coffee
new file mode 100644
index 00000000..a99b907d
--- /dev/null
+++ b/app/assets/javascripts/lib/proxy.js.coffee
@@ -0,0 +1,31 @@
+class CakeSide.Proxy
+  @create: do ->
+    parse = (object, path) ->
+      return unless CakeSide.Proxy.typeOf(object) == 'object' and path?
+      return [object, path] if path.indexOf('.') == -1
+      path = path.split('.')
+      tail = path.pop()
+      for property in path
+        return unless object.hasOwnProperty(property)
+        object = object[property]
+      [object, tail]
+
+    read = (object, path) ->
+      parts = parse(object, path)
+      return parts[0][parts[1]] if parts
+
+    write = (object, path, value) ->
+      parts = parse(object, path)
+      if parts
+        parts[0][parts[1]] = value
+        value
+
+    (object, path, value) ->
+      return read(object, path) if arguments.length == 2
+      return write(object, path, value) if arguments.length == 3
+      console.error '[CakeSide.Proxy.create] incorrect number of arguments'
+
+  @typeOf: (object) ->
+    return 'array' if _.isArray(object)
+    return 'regexp' if _.isRegExp(object)
+    typeof(object)