install and use redux to fetch data from server

client/src/store/actions/doorLockActions.js

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+import {
+    FETCH_DOOR_LOCK_CHARGES_PENDING,
+    FETCH_DOOR_LOCK_CHARGES_SUCCESS,
+    FETCH_DOOR_LOCK_CHARGES_FAILED
+} from "../constants";
+
+export const fetchDoorLockCharges = (dispatch) => {
+    dispatch({type: FETCH_DOOR_LOCK_CHARGES_PENDING});
+    fetch('/api/doorLockCharges')
+        .then(response => response.json())
+        .then(data => {
+            dispatch({type: FETCH_DOOR_LOCK_CHARGES_SUCCESS, payload: data})
+        })
+        .catch(err => {
+            dispatch({type: FETCH_DOOR_LOCK_CHARGES_FAILED, payload: err})
+        })
+};

client/src/store/actions/index.js

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+export * from './doorLockActions';

client/src/store/constants.js

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+export const FETCH_DOOR_LOCK_CHARGES_PENDING = 'FETCH_DOOR_LOCK_CHARGES_PENDING';
+export const FETCH_DOOR_LOCK_CHARGES_SUCCESS = 'FETCH_DOOR_LOCK_CHARGES_SUCCESS';
+export const FETCH_DOOR_LOCK_CHARGES_FAILED = 'FETCH_DOOR_LOCK_CHARGES_FAILED';

client/src/store/reducers/doorLockReducers.js

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+import {
+    FETCH_DOOR_LOCK_CHARGES_PENDING,
+    FETCH_DOOR_LOCK_CHARGES_SUCCESS,
+    FETCH_DOOR_LOCK_CHARGES_FAILED
+} from "../constants";
+
+const initialState = {
+    incidents: [],
+    pending: false,
+    error: '',
+};
+
+export const doorLockCharges = (state, action) => {
+  state = state || initialState;
+  action = action || {};
+
+  switch(action.type){
+      case FETCH_DOOR_LOCK_CHARGES_PENDING:
+          return Object.assign({}, state, {
+              pending: true,
+          });
+      case FETCH_DOOR_LOCK_CHARGES_SUCCESS:
+          return Object.assign({}, state, {
+              incidents: action.payload,
+              pending: false,
+          });
+      case FETCH_DOOR_LOCK_CHARGES_FAILED:
+          return Object.assign({}, state, {
+              pending: false,
+              error: action.payload,
+          });
+      default:
+          return state;
+  }
+};

client/src/store/reducers/index.js

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+import { combineReducers } from "redux";
+
+import { doorLockCharges} from "./doorLockReducers";
+
+export const rootReducer = combineReducers({
+    doorLockCharges
+});
+