Add global state and right click menu using redux

app/reducers/contextMenu.jsx

@@ -0,0 +1,31 @@
+import { UPDATE_CONTEXT_MENU, OPEN_CONTEXT_MENU, CLOSE_CONTEXT_MENU } from '../constants'
+
+
+const initialState =
+  {
+    opened: false,
+    x: 0,
+    y: 0,
+    items: []
+  }
+
+export default function contextMenu(state = initialState, action){
+    switch (action.type) {
+        case UPDATE_CONTEXT_MENU:
+            return Object.assign({}, state,{
+                items: action.items
+            })
+        case OPEN_CONTEXT_MENU:
+            return Object.assign({}, state, {
+                opened: true,
+                x: action.x,
+                y: action.y
+            })
+        case CLOSE_CONTEXT_MENU:
+            return Object.assign({}, state, {
+                opened: false
+            })
+        default:
+            return state
+    }
+}

app/reducers/index.jsx

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+import { combineReducers } from 'redux'
+import contextMenu from './contextMenu'
+
+const rootReducer = combineReducers({
+  contextMenu
+})
+
+export default rootReducer