PWA: tryb offline

src/App.vue

@@ -29,7 +29,7 @@
 </template>
 
 <script lang="ts">
-import { computed, defineComponent, provide, ref, watch } from 'vue';
+import { computed, defineComponent, KeepAlive, provide, ref, watch } from 'vue';
 
 import Clock from './components/App/Clock.vue';
 
@@ -44,6 +44,9 @@ import imageMixin from './mixins/imageMixin';
 import AppHeader from './components/App/AppHeader.vue';
 import axios from 'axios';
 import UpdatePrompt from './components/App/UpdatePrompt.vue';
+import { VERSION } from 'vue-i18n';
+import { RouterView } from 'vue-router';
+import useCustomSW from './mixins/useCustomSW';
 
 export default defineComponent({
   components: {
@@ -52,8 +55,8 @@ export default defineComponent({
     SelectBox,
     TrainModal,
     AppHeader,
-    UpdatePrompt
-},
+    UpdatePrompt,
+  },
 
   mixins: [imageMixin],
 
@@ -61,6 +64,8 @@ export default defineComponent({
     const store = useStore();
     store.connectToAPI();
 
+    const { offlineReady } = useCustomSW();
+
     const isFilterCardVisible = ref(false);
 
     provide('isFilterCardVisible', isFilterCardVisible);
@@ -85,6 +90,25 @@ export default defineComponent({
 
   created() {
     this.loadLang();
+
+    this.store.isOffline = !window.navigator.onLine;
+
+    window.addEventListener('offline', () => {
+      this.store.isOffline = true;
+
+      this.store.apiData = {
+        stations: [],
+        dispatchers: [],
+        trains: [],
+        connectedSocketCount: 0,
+      };
+
+      this.store.setOnlineData();
+    });
+
+    window.addEventListener('online', () => {
+      this.store.isOffline = false;
+    });
   },
 
   async mounted() {

src/components/App/StatusIndicator.vue

@@ -161,7 +161,6 @@
 </template>
 
 <script lang="ts">
-
 import { defineComponent } from 'vue';
 import { DataStatus } from '../../scripts/enums/DataStatus';
 import { useStore } from '../../store/store';
@@ -172,6 +171,7 @@ export default defineComponent({
     return {
       tooltipActive: false,
       indicator: {
+        offline: false,
         status: DataStatus.Loading,
         message: 'data-status.S3',
       },
@@ -193,6 +193,7 @@ export default defineComponent({
 
     return {
       dataStatus: store.dataStatuses,
+      store,
     };
   },
 
@@ -206,6 +207,13 @@ export default defineComponent({
         const trainsDataStatus = statuses.trains;
         const dispatcherDataStatus = statuses.dispatchers;
 
+        if (this.store.isOffline) {
+          this.setSignalStatus(DataStatus.Initialized);
+          this.indicator.status = DataStatus.Initialized;
+          this.indicator.message = 'data-status.S1-offline';
+          return;
+        }
+
         if (connectionStatus == DataStatus.Error) {
           this.setSignalStatus(connectionStatus);
           this.indicator.status = connectionStatus;
@@ -252,6 +260,10 @@ export default defineComponent({
       this.orangeLight = false;
       this.redBottomLight = false;
 
+      if (status == DataStatus.Initialized) {
+        this.redTopLight = true;
+      }
+
       if (status == DataStatus.Loaded) {
         this.greenLight = true;
       }

src/components/App/UpdatePrompt.vue

@@ -14,18 +14,11 @@
 </template>
 
 <script setup lang="ts">
-import { useRegisterSW } from 'virtual:pwa-register/vue';
 import { ref } from 'vue';
+import useCustomSW from '../../mixins/useCustomSW';
 
 const hidePrompt = ref(false);
-
-const { needRefresh, updateServiceWorker } = useRegisterSW({
-  immediate: true,
-
-  onNeedRefresh() {
-    console.log('Needs refresh!');
-  },
-});
+const { needRefresh, updateServiceWorker } = useCustomSW();
 </script>
 
 <style lang="scss" scoped>

src/components/JournalView/JournalStats.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="journal-stats">
+  <div class="journal-stats" v-show="!store.isOffline">
     <div class="tabs">
       <button
         v-for="tab in data.tabs"

src/components/TrainsView/TrainTable.vue

@@ -2,18 +2,22 @@
   <div class="train-table">
     <transition name="anim" mode="out-in">
       <div :key="store.dataStatuses.trains">
-        <Loading v-if="trains.length == 0 && store.dataStatuses.trains == 0" />
+        <div class="table-info" v-if="store.isOffline">
+          {{ $t('app.offline') }}
+        </div>
 
-        <div class="table-info no-trains" v-if="trains.length == 0 && store.dataStatuses.trains != 0">
+        <Loading v-else-if="trains.length == 0 && store.dataStatuses.trains == 0" />
+
+        <div class="table-info no-trains" v-else-if="trains.length == 0 && store.dataStatuses.trains != 0">
           {{ $t('trains.no-trains') }}
         </div>
 
-        <div class="timeouts-warning" v-if="trainNumbersWithTimeouts.length != 0">
+        <div class="timeouts-warning" v-if="trainNumbersWithTimeouts.length == 0">
           <b class="warning-timeout">?</b>
           {{ $t('trains.timeout') }}
         </div>
-
-        <ul class="train-list">
+        
+        <ul class="train-list" v-else>
           <li
             class="train-row"
             v-for="train in currentTrains"

src/locales/en.json

@@ -11,7 +11,8 @@
     "error": "An error occured while loading data!",
     "no-result": "No results for current search!",
     "migration-warning": "Stacjownik services will be unavailable 2/06/2022 between 1-3am (CEST time) due to the migration of API hostings!",
-    "migration-confirm": "Roger that!"
+    "migration-confirm": "Roger that!",
+    "offline": "App is in the offline mode!"
   },
   "update": {
     "title": "New Stacjownik version is available!",
@@ -20,6 +21,7 @@
     "confirm-button": "Understood!"
   },
   "data-status": {
+    "S1-offline": "<b>S1 signal</b> <br> The app is working in offline mode!",
     "S1a-connection": "<b>S1a signal</b> <br> Cannot connect with Stacjownik API service!",
     "S1a-sceneries": "<b>S1a signal</b> <br> Cannot load online stations data!",
     "S2": "<b>S2 signal</b> <br> All data loaded successfully!",

src/locales/pl.json

@@ -11,7 +11,8 @@
     "error": "Wystąpił problem z załadowaniem danych!",
     "no-result": "Brak wyników o podanych kryteriach!",
     "migration-warning": "Usługi Stacjownika będą niedostępne w godzinach 1:00-3:00 2 czerwca 2022r. z powodu migracji hostingów API!",
-    "migration-confirm": "Przyjąłem!"
+    "migration-confirm": "Przyjąłem!",
+    "offline": "Aplikacja w trybie offline!"
   },
 
   "update": {
@@ -22,6 +23,7 @@
   },
 
   "data-status": {
+    "S1-offline": "<b>Sygnał S1</b> <br> Aplikacja działa w trybie offline!",
     "S1a-connection": "<b>Sygnał S1a</b> <br> Błąd podczas próby połączenia się z API Stacjownika!",
     "S1a-sceneries": "<b>Sygnał S1a</b> <br> Błąd podczas pobierania danych o sceneriach online!",
     "S2": "<b>Sygnał S2</b> <br> Pomyślnie załadowano dane!",

src/mixins/useCustomSW.ts

@@ -0,0 +1,13 @@
+import { useRegisterSW } from 'virtual:pwa-register/vue';
+
+export default () => {
+  const { needRefresh, updateServiceWorker, offlineReady } = useRegisterSW({
+    immediate: true,
+  });
+
+  return {
+    needRefresh,
+    updateServiceWorker,
+    offlineReady,
+  };
+};

src/store/stationFiltersStore.ts

@@ -3,6 +3,7 @@ import inputData from '../data/options.json';
 import Filter from '../scripts/interfaces/Filter';
 import Station from '../scripts/interfaces/Station';
 import StorageManager from '../scripts/managers/storageManager';
+import { useStore } from './store';
 
 const sortStations = (a: Station, b: Station, sorter: { index: number; dir: number }) => {
   switch (sorter.index) {
@@ -58,7 +59,7 @@ const sortStations = (a: Station, b: Station, sorter: { index: number; dir: numb
   return a.name.localeCompare(b.name);
 };
 
-const filterStations = (station: Station, filters: Filter) => {
+const filterStations = (station: Station, filters: Filter, isOffline = false) => {
   const returnMode = false;
 
   if ((station.generalInfo?.availability == 'nonPublic' || !station.generalInfo) && filters['nonPublic'])
@@ -236,6 +237,7 @@ export const useStationFiltersStore = defineStore('stationFiltersStore', {
       inputs: inputData,
       filters: { ...filterInitStates },
       sorterActive: { index: 0, dir: 1 },
+      store: useStore(),
     };
   },
 
@@ -249,7 +251,7 @@ export const useStationFiltersStore = defineStore('stationFiltersStore', {
 
           return station;
         })
-        .filter((station) => filterStations(station, this.filters))
+        .filter((station) => filterStations(station, this.filters, this.store.isOffline))
         .sort((a, b) => sortStations(a, b, this.sorterActive));
     },
 
@@ -303,3 +305,4 @@ export const useStationFiltersStore = defineStore('stationFiltersStore', {
     },
   },
 });
+

src/store/store.ts

@@ -17,7 +17,6 @@ import {
 } from '../scripts/utils/storeUtils';
 import { APIData, StationJSONData, StoreState } from './storeTypes';
 
-
 export const useStore = defineStore('store', {
   state: () =>
     ({
@@ -35,6 +34,7 @@ export const useStore = defineStore('store', {
       stationCount: 0,
 
       webSocket: undefined,
+      isOffline: false,
 
       dispatcherStatsName: '',
       dispatcherStatsData: undefined,
@@ -57,7 +57,6 @@ export const useStore = defineStore('store', {
 
       blockScroll: false,
       listenerLaunched: false,
-
     } as StoreState),
 
   actions: {
@@ -225,6 +224,14 @@ export const useStore = defineStore('store', {
       const onlineStationNames: string[] = [];
       const prevDispatcherStatuses: StoreState['lastDispatcherStatuses'] = [];
 
+      if (this.isOffline) {
+        this.stationList.forEach((station) => {
+          station.onlineInfo = undefined;
+        });
+
+        return;
+      }
+
       this.apiData.stations?.forEach((stationAPIData) => {
         if (stationAPIData.region !== this.region.id || !stationAPIData.isOnline) return;
         const station = this.stationList.find((s) => s.name === stationAPIData.stationName);
@@ -352,12 +359,11 @@ export const useStore = defineStore('store', {
         transports: ['websocket', 'polling'],
         rememberUpgrade: true,
         reconnection: true,
-        timeout: 10000,
+        timeout: 2000,
       });
 
       socket.on('connect_error', (err) => {
         this.dataStatuses.connection = DataStatus.Error;
-        this.webSocket = undefined;
       });
 
       socket.on('UPDATE', (data: APIData) => {
@@ -368,6 +374,7 @@ export const useStore = defineStore('store', {
 
       socket.emit('FETCH_DATA', {}, (data: APIData) => {
         this.apiData = data;
+        this.dataStatuses.connection = DataStatus.Loaded;
         this.setOnlineData();
       });
 

src/store/storeTypes.ts

@@ -23,6 +23,7 @@ export interface StoreState {
   stationCount: number;
 
   webSocket?: Socket;
+  isOffline: boolean;
 
   dispatcherStatsName: string;
   dispatcherStatsData?: DispatcherStatsAPIData;

src/views/JournalDispatchers.vue

@@ -14,7 +14,11 @@
       <div class="list_wrapper" @scroll="handleScroll">
         <!-- <transition name="warning" mode="out-in"> -->
         <!-- <div :key="dataStatus"> -->
-        <Loading v-if="dataStatus == DataStatus.Initialized || dataStatus == DataStatus.Loading" />
+        <div class="journal_warning" v-if="store.isOffline">
+          {{ $t('app.offline') }}
+        </div>
+
+        <Loading v-else-if="dataStatus == DataStatus.Initialized || dataStatus == DataStatus.Loading" />
 
         <div v-else-if="dataStatus == DataStatus.Error" class="journal_warning error">
           {{ $t('app.error') }}

src/views/JournalTimetables.vue

@@ -17,7 +17,11 @@
       <div class="list_wrapper" @scroll="handleScroll">
         <!-- <transition name="warning" mode="out-in"> -->
         <!-- <div :key="dataStatus"> -->
-        <Loading v-if="dataStatus == DataStatus.Initialized || dataStatus == DataStatus.Loading" />
+        <div class="journal_warning" v-if="store.isOffline">
+          {{ $t('app.offline') }}
+        </div>
+
+        <Loading v-else-if="dataStatus == DataStatus.Initialized || dataStatus == DataStatus.Loading" />
 
         <div v-else-if="dataStatus == DataStatus.Error" class="journal_warning error">
           {{ $t('app.error') }}