Add connection reducer

Dashboard/app/renderer/store/actions/actionTypes.js

@@ -0,0 +1,4 @@
+export const SET_CONNECTION_PARAMS = 'SET_CONNECTION_PARAMS';
+export const CONNECT = 'CONNECT';
+export const DISCONNECT = 'DISCONNECT';
+export const SET_CONNECTION_STATUS = 'SET_CONNECTION_STATUS';

Dashboard/app/renderer/store/reducers/comConnectionStatusReducer.js

@@ -0,0 +1,17 @@
+import { SET_CONNECTION_STATUS } from '../actions/actionTypes';
+
+const initialState = false;
+
+export default (state = initialState, { type, payload }) => {
+  switch (type) {
+    case SET_CONNECTION_STATUS:
+      if (typeof payload === 'boolean') {
+        return payload;
+      } else {
+        return state;
+      }
+
+    default:
+      return state;
+  }
+};

Dashboard/app/renderer/store/reducers/index.js

@@ -1,6 +1,7 @@
 import { combineReducers } from 'redux';
 import comConnectionReducer from './comConnectionReducer';
+import comConnectionStatusReducer from './comConnectionStatusReducer';
 
-const rootReducer = combineReducers({ comConnectionReducer });
+const rootReducer = combineReducers({ comConnectionReducer, comConnectionStatusReducer });
 
 export default rootReducer;