Moved Header into separate component, added ConnectionMonitor

src/components/Header/ConnectionMonitor.vue

@@ -0,0 +1,85 @@
+<template>
+  <v-tooltip :text="`Last ping from server received at ${secondsFromLastPing} seconds ago`" location="bottom">
+    <template v-slot:activator="{ props }">
+      <v-icon :color="(secondsFromLastPing > pingThreshold || secondsFromLastPing === null) ? 'red' : 'green'" v-bind="props" class="mr-6">mdi-server</v-icon>
+    </template>
+  </v-tooltip>
+</template>
+
+<script>
+import { VTooltip } from 'vuetify/components/VTooltip'
+import { VIcon } from 'vuetify/components/VIcon'
+import {mapGetters} from "vuex";
+
+export default {
+  name: "ConnectionMonitor",
+  components: {
+    VTooltip,
+    VIcon
+  },
+  data() {
+    return {
+      pingThreshold: 10,
+      pingError: false,
+      secondsFromLastPing: null,
+      setupStreamInterval: null,
+    }
+  },
+  computed: {
+    ...mapGetters([
+      'lastPingReceived'
+    ])
+  },
+  mounted() {
+    // window.setInterval(() => {
+    //   this.monitorServerConnection()
+    // }, 10000)
+    window.setInterval(() => {
+      this.secondsFromLastPing = Math.floor(((new Date()).getTime() - this.lastPingReceived) / 1000)
+      this.pingError = this.secondsFromLastPing > this.pingThreshold
+    }, 1000)
+  },
+  watch: {
+    pingError(error) {
+      if (error) {
+        this.$toast.error(`Connection with server lost, attempting to reconnect...`, {
+          position: "top-right",
+          duration: false,
+        });
+        this.setupStreamInterval = window.setInterval(() => {
+          this.$emit('setupStream')
+        }, 3000)
+      } else {
+        window.clearTimeout(this.setupStreamInterval);
+        this.$toast.clear();
+        this.$toast.success(`Connection with server reestablished`, {
+          position: "top-right",
+        });
+      }
+    },
+  },
+  methods: {
+    monitorServerConnection () {
+      if (this.secondsFromLastPing > this.pingThreshold) {
+        this.pingError = true;
+        this.$toast.error(`Connection with server lost, attempting to reconnect...`, {
+          position: "top-right",
+        });
+        this.setupStream();
+      } else {
+        if (this.pingError) {
+          this.$toast.success(`Connection with server reestablished`, {
+            position: "top-right",
+          });
+          setTimeout(this.$toast.clear, 3000);
+        }
+        this.pingError = false;
+      }
+    }
+  }
+}
+</script>
+
+<style scoped>
+
+</style>

src/components/Header/Header.vue

@@ -0,0 +1,58 @@
+<template>
+  <v-row no-gutters>
+    <v-col cols="12" sm="5" class="d-flex justify-start flex-wrap" >
+      <Datepicker class="ma-2" :refresh="refreshFilterState" />
+    </v-col>
+    <v-col cols="12" sm="2" class="d-flex justify-center flex-wrap">
+      <h1 class="app-title"> Logmower </h1>
+    </v-col>
+    <v-col cols="12" sm="5" class="d-flex justify-end flex-wrap align-center">
+      <ConnectionMonitor @setup-stream="setupStream" />
+      <v-btn
+          color="blue-grey"
+          class="ma-2"
+          :prepend-icon="streaming ? 'mdi-pause' :'mdi-play'"
+          @click="toggleFilterQueryStreaming"
+      >
+        Stream new lines
+      </v-btn>
+    </v-col>
+  </v-row>
+</template>
+<script>
+import { VRow, VCol } from 'vuetify/components/VGrid'
+import { VBtn } from 'vuetify/components/VBtn'
+import Datepicker from "../Grid/Main/Filter/Datepicker.vue";
+import {mapActions, mapGetters} from "vuex";
+import ConnectionMonitor from "./ConnectionMonitor.vue";
+
+export default {
+  components: {
+    ConnectionMonitor,
+    Datepicker,
+    VRow,
+    VCol,
+    VBtn
+  },
+  props: {
+    refreshFilterState: Function
+  },
+  computed: {
+    ...mapGetters([
+      'streaming'
+    ]),
+  },
+  methods: {
+    ...mapActions({
+      toggleFilterQueryStreaming: 'toggleFilterQueryStreaming',
+    }),
+    setupStream () {
+      this.$emit('setupStream')
+    }
+  }
+}
+</script>
+
+<style scoped>
+
+</style>

src/components/LogViewer.vue

@@ -1,23 +1,6 @@
 <template>
   <div style="height: 100%; width: 100%;" v-resize="onResize">
-   <v-row no-gutters>
-     <v-col cols="12" sm="5" class="d-flex justify-start flex-wrap">
-       <Datepicker class="ma-2" :refresh="refreshFilterState" />
-     </v-col>
-     <v-col cols="12" sm="2" class="d-flex justify-center flex-wrap">
-       <h1 class="app-title"> Logmower </h1>
-     </v-col>
-     <v-col cols="12" sm="5" class="d-flex justify-end flex-wrap">
-       <v-btn
-           color="blue-grey"
-           class="ma-2"
-           :prepend-icon="streaming ? 'mdi-pause' :'mdi-play'"
-           @click="toggleFilterQueryStreaming"
-       >
-         Stream new lines
-       </v-btn>
-     </v-col>
-    </v-row>
+    <Header :refresh-filter-state="refreshFilterState" @setup-stream="setupStream" />
     <ag-grid-vue
       style="width: 100%; height: calc(100% - 52px);"
       class="ag-theme-material"
@@ -44,8 +27,6 @@
 import { AgGridVue } from "ag-grid-vue3";
 import "ag-grid-community/styles//ag-grid.css";
 import "ag-grid-community/styles//ag-theme-material.css";
-import { VBtn } from 'vuetify/components/VBtn'
-import { VRow, VCol } from 'vuetify/components/VGrid'
 import { Resize } from 'vuetify/directives';
 import ExamineLogModal from "./Modal/ExamineLogModal.vue";
 import ComboboxFilter from "./Grid/Main/Filter/ComboboxFilter.js";
@@ -54,19 +35,16 @@ import flattenObj from "../helpers/flattenObj";
 import parseEventData from "../helpers/parseEventData";
 import {mapActions, mapGetters} from 'vuex';
 import config from "./Grid/Main/config";
-import Datepicker from "./Grid/Main/Filter/Datepicker.vue";
 import loadingOverlay from "./Grid/Main/loadingOverlay";
+import Header from "./Header/Header.vue";
 
 export default {
   components: {
-    Datepicker,
+    Header,
     ExamineLogModal,
     AgGridVue,
     ComboboxFilter,
     MessageWithLevelRenderer,
-    VBtn,
-    VRow,
-    VCol,
     loadingOverlay
   },
   directives: {
@@ -110,7 +88,7 @@ export default {
     ...mapActions({
       setFilterOptions: 'setFilterOptions',
       setFilterQuery: 'setFilterQuery',
-      toggleFilterQueryStreaming: 'toggleFilterQueryStreaming',
+      setLastPingReceived: 'setLastPingReceived',
     }),
     onResize () {
       if (this.gridApi) {
@@ -129,6 +107,7 @@ export default {
       if (url.searchParams.keys().next()) {
         let es = new EventSource(url.toString());
         es.onmessage = (e) => this.handleReceiveMessage(e)
+        es.addEventListener("ping", (e) => this.handleReceivePing())
         es.addEventListener("filters", (e) => this.handleReceiveFilters(e))
         es.addEventListener("timeout", (e) => this.handleReceiveTimeout(e))
         es.addEventListener("completed", (e) => this.handleAllReceived(e))
@@ -247,6 +226,9 @@ export default {
     handleAllReceived () {
       this.gridApi.hideOverlay();
     },
+    handleReceivePing () {
+      this.setLastPingReceived()
+    },
     doesExternalFilterPass(node) {
       if (node.data && this.filterQuery.from && this.filterQuery.to) {
         let ts = new Date(node.data['@timestamp']).getTime()

src/stores/index.js

@@ -4,6 +4,7 @@ const store = createStore({
   state: {
     filterOptions: {},
     filterQuery: {},
+    lastPingReceived: null,
   },
   getters: {
     streaming (state) {
@@ -11,7 +12,10 @@ const store = createStore({
     },
     filterQuery (state) {
       return state.filterQuery
-    }
+    },
+    lastPingReceived (state) {
+      return state.lastPingReceived
+    },
   },
   actions: {
     setFilterOptions(context, payload) {
@@ -30,6 +34,9 @@ const store = createStore({
       query.streaming = false
       commit("SET_FILTER_QUERY", query);
     },
+    setLastPingReceived(context) {
+      context.commit("SET_LAST_PING_RECEIVED");
+    },
   },
   mutations: {
     SET_FILTER_OPTIONS(state, payload) {
@@ -55,6 +62,9 @@ const store = createStore({
 
       state.filterQuery = query
     },
+    SET_LAST_PING_RECEIVED(state) {
+      state.lastPingReceived = (new Date()).getTime()
+    }
   },
 });
 

vite.config.js

@@ -22,5 +22,10 @@ export default {
     vuetify: {
       // https://github.com/vuetifyjs/vuetify-loader/tree/next/packages/vuetify-loader
     }
-  }
+  },
+  optimizeDeps: {
+    exclude: [
+      "@meforma/vue-toaster"
+    ]
+  },
 }