lib/ios: implement data_store using NSUserDefaults

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/app/data_store.nit b/lib/app/data_store.nit
index 5c59036..4db4b22 100644 (file)
--- a/lib/app/data_store.nit
+++ b/lib/app/data_store.nit
@@ -26,6 +26,7 @@ import serialization
 # TODO: move on the platform once qualified names are understand in the condition
 import linux::data_store is conditional(linux)
 import android::data_store is conditional(android)
+import ios::data_store is conditional(ios)
 
 redef class App
        # Services to store and load data

diff --git a/lib/ios/data_store.nit b/lib/ios/data_store.nit
new file mode 100644 (file)
index 0000000..6d1579d
--- /dev/null
+++ b/lib/ios/data_store.nit
@@ -0,0 +1,60 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Implements `app::data_store` using `NSUserDefaults`
+module data_store
+
+import app::data_store
+import cocoa::foundation
+private import json::serialization
+
+redef class App
+       redef var data_store = new UserDefaultView
+end
+
+private class UserDefaultView
+       super DataStore
+
+       # The `NSUserDefaults` used to implement `DataStore`
+       var user_defaults = new NSUserDefaults.standard_user_defaults is lazy
+
+       redef fun [](key)
+       do
+               var nsstr = user_defaults.string_for_key(key.to_nsstring)
+
+               if nsstr.address_is_null then return null
+
+               # TODO report errors
+               var deserializer = new JsonDeserializer(nsstr.to_s)
+               return deserializer.deserialize
+       end
+
+       redef fun []=(key, value)
+       do
+               var nsobject: NSString
+
+               if value == null then
+                       nsobject = new NSString.nil
+               else
+                       var serialized_string = new StringWriter
+                       var serializer = new JsonSerializer(serialized_string)
+                       serializer.serialize(value)
+
+                       # TODO report errors
+                       nsobject = serialized_string.to_s.to_nsstring
+               end
+
+               user_defaults.set_object(nsobject, key.to_nsstring)
+       end
+end