first Blockly functionalities

Attention: the buttons currently trigger an error

src/reducers/index.js

@@ -0,0 +1,6 @@
+import { combineReducers } from 'redux';
+import workspaceReducer from './workspaceReducer';
+
+export default combineReducers({
+  workspace: workspaceReducer
+});

src/reducers/workspaceReducer.js

@@ -0,0 +1,35 @@
+import { NEW_WORKSPACE, CREATE_BLOCK, CHANGE_BLOCK, DELETE_BLOCK, CLEAR_STATS } from '../actions/types';
+
+
+const initialState = {
+  old: {},
+  new: {},
+  stats: {
+    create: 0,
+    change: 0,
+    delete: 0,
+  },
+  test: 0
+};
+
+export default function(state = initialState, action){
+  switch(action.type){
+    case NEW_WORKSPACE:
+      return {
+        ...state,
+        old: action.payload.old,
+        new: action.payload.new,
+        test: state.test += 1
+      };
+    case CREATE_BLOCK:
+    case CHANGE_BLOCK:
+    case DELETE_BLOCK:
+    case CLEAR_STATS:
+      return {
+        ...state,
+        stats: action.payload
+      };
+    default:
+      return state;
+  }
+}