created the 'add' method into the cargo flow

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 This file contains highlights of what changes on each version of the force package.
 
+#### Pub version 0.3.4 ####
+
+- Add the method, 'add' to cargo, so you can add data to a key in a list. This can be handy if you want to collect data.
+- Improve the working of localstorage, encode and decode objects.
+
 #### Pub version 0.3.3 ####
 
 - Add the implementation of IndexDb as an option

lib/cargo_client.dart

@@ -3,6 +3,7 @@ library cargo_client;
 import 'package:logging/logging.dart' show Logger, Level, LogRecord;
 import 'dart:html';
 import 'dart:async';
+import 'dart:convert';
 import 'dart:indexed_db';
 
 import 'package:cargo/cargo_base.dart';

lib/src/cargo.dart

@@ -11,6 +11,9 @@ abstract class CargoBase {
 
   /// Set/update an item synchronously
   void setItem(String key, data);
+
+  /// Add item synchronously
+  void add(String key, data);
 
   /// Remove/delete an item synchronously
   void removeItem(String key);

lib/src/client/indexdb_impl.dart

@@ -20,15 +20,41 @@ class IndexDbCargo extends Cargo {
   }
 
   Future getItem(String key) {
-    return _doCommand((ObjectStore store) => store.delete(key));
+    return _doCommand((ObjectStore store) => store.getObject(key),
+    'readonly');
   }
 
   void setItem(String key, data) {
     _doCommand((ObjectStore store) {
-       return store.put(key, data);
+      dispatch(key, data); 
+      return store.put(key, data);
     });
 
-    dispatch(key, data);
+
+  }
+
+  void add(String key, data) {
+
+    _doCommand((ObjectStore store) {
+
+      store.getObject(key).then((obj) {
+        if (obj is List) {
+          List list = obj;
+          list.add(data);
+
+          dispatch(key, list);
+          return store.put(key, list);
+        }
+
+      }, onError: (e) {
+        List list = new List();
+        list.add(data);
+
+        dispatch(key, list);
+        return store.put(key, list);
+      }); 
+    });  
+
   }
 
   void removeItem(String key) {

lib/src/client/storage_impl.dart

@@ -10,20 +10,37 @@ class LocalstorageCargo extends Cargo {
   }
 
   dynamic getItemSync(String key) {
-    return values[key];
+    return JSON.decode(values[key]);
   }
 
   Future getItem(String key) {
     Completer complete = new Completer();
-    complete.complete(values[key]);
+    complete.complete(JSON.decode(values[key]));
     return complete.future;
   }
 
   void setItem(String key, data) {
-    values[key] = data;
+    values[key] = JSON.encode(data);
 
     dispatch(key, data);
   }
+
+  void add(String key, data) {
+      List list = new List(); 
+      if (values.containsKey(key)) {
+        Object obj = JSON.decode(values[key]);
+        if (obj is List) {
+          list = JSON.decode(values[key]);
+        }
+      }
+      _add(list, key, data);
+  }
+
+  void _add(List list, String key, data) {
+    list.add(data);
+
+    setItem(key, list);
+  }
 
   void removeItem(String key) {
     values.remove(key);

lib/src/server/file_impl.dart

@@ -77,6 +77,24 @@ class FileBackend extends Cargo {
     }
     dispatch(key, data);
   }
+
+  void add(String key, data) {
+       List list = new List(); 
+       if (keys.contains(key)) {
+         Object obj = getItem(key).then((obj) {
+           if (obj is List) {
+              list = obj;
+              _add(list, key, data);
+           }
+         });
+       }
+   }
+
+   void _add(List list, String key, data) {
+     list.add(data);
+
+     setItem(key, list);
+   }
 
   void _writeFile (File file, key, data) {
     file.writeAsStringSync(JSON.encode(data));

lib/src/shared/memory_impl.dart

@@ -24,6 +24,23 @@ class MemoryImpl extends CargoBase with CargoDispatch {
 
     dispatch(key, data);
   }
+
+  void add(String key, data) {
+    List list = new List(); 
+    if (values.containsKey(key)) {
+      if (values[key] is List) {
+        list = values[key];
+      }
+    }
+    _add(list, key, data);
+   }
+
+  void _add(List list, String key, data) {
+      list.add(data);
+
+      dispatch(key, list);
+      values[key] = list;
+  }
 
   void removeItem(String key) {
     values.remove(key);

pubspec.yaml

@@ -1,5 +1,5 @@
 name: cargo
-version: 0.3.3
+version: 0.3.4
 author: Joris Hermans <hermansj@gmail.com>
 description: A key value, storage library for dart
 homepage: https://github.com/jorishermans/cargo