add retries for pinging function

backend:
- new field for monitor: maxretries
- new pending status while service is retrying: 2
- pending status event is not marked important
- pending pings however register as downtime in the calculation

frontend:
- added pending status while service is retrying
- added color for new pending status
- added field to configure amount of retries

database:
- IMPORTANT: THIS REQUIRES MIGRATION!!!!
- added field: maxretries with default value 0

.gitignore

@@ -7,3 +7,4 @@ dist-ssr
 
 /data
 !/data/.gitkeep
+.vscode

server/model/monitor.js

@@ -16,7 +16,6 @@ const {Notification} = require("../notification")
  *      1 = UP
  */
 class Monitor extends BeanModel {
-
     async toJSON() {
 
         let notificationIDList = {};
@@ -35,6 +34,7 @@ class Monitor extends BeanModel {
             url: this.url,
             hostname: this.hostname,
             port: this.port,
+            maxretries: this.maxretries,
             weight: this.weight,
             active: this.active,
             type: this.type,
@@ -46,6 +46,7 @@ class Monitor extends BeanModel {
 
     start(io) {
         let previousBeat = null;
+        let retries = 0;
 
         const beat = async () => {
             console.log(`Monitor ${this.id}: Heartbeat`)
@@ -109,12 +110,18 @@ class Monitor extends BeanModel {
                     bean.status = 1;
                 }
 
+                retries = 0;
+
             } catch (error) {
+                if ((this.maxretries > 0) && (retries < this.maxretries)) {
+                    retries++;
+                    bean.status = 2;
+                }
                 bean.msg = error.message;
             }
 
-            // Mark as important if status changed
+            // Mark as important if status changed, ignore pending pings
-            if (! previousBeat || previousBeat.status !== bean.status) {
+            if ((! previousBeat || previousBeat.status !== bean.status) && bean.status !== 2) {
                 bean.important = true;
 
                 // Do not send if first beat is UP
@@ -233,7 +240,7 @@ class Monitor extends BeanModel {
                 }
 
                 total += value;
-                if (row.status === 0) {
+                if (row.status === 0 || row.status === 2) {
                     downtime += value;
                 }
             }

server/server.js

@@ -219,6 +219,7 @@ let needSetup = false;
                 bean.url = monitor.url
                 bean.interval = monitor.interval
                 bean.hostname = monitor.hostname;
+                bean.maxretries = monitor.maxretries;
                 bean.port = monitor.port;
                 bean.keyword = monitor.keyword;
 

src/assets/vars.scss

@@ -1,5 +1,6 @@
 $primary: #5CDD8B;
 $danger: #DC3545;
+$warning: #f8a306;
 $link-color: #111;
 $border-radius: 50rem;
 

src/components/HeartbeatBar.vue

@@ -3,7 +3,7 @@
         <div class="hp-bar-big" :style="barStyle">
             <div
                 class="beat"
-                :class="{ 'empty' : (beat === 0), 'down' : (beat.status === 0) }"
+                :class="{ 'empty' : (beat === 0), 'down' : (beat.status === 0), 'pending' : (beat.status === 2) }"
                 :style="beatStyle"
                 v-for="(beat, index) in shortBeatList"
                 :key="index"
@@ -166,6 +166,10 @@ export default {
             background-color: $danger;
         }
 
+        &.pending {
+            background-color: $warning;
+        }
+
         &:not(.empty):hover {
             transition: all ease-in-out 0.15s;
             opacity: 0.8;

src/components/Status.vue

@@ -14,6 +14,8 @@ export default {
                 return "danger"
             } else if (this.status === 1) {
                 return "primary"
+            } else if (this.status === 2) {
+                return "warning"
             } else {
                 return "secondary"
             }
@@ -24,6 +26,8 @@ export default {
                 return "Down"
             } else if (this.status === 1) {
                 return "Up"
+            } else if (this.status === 2) {
+                return "Pending"
             } else {
                 return "Unknown"
             }
@@ -34,6 +38,6 @@ export default {
 
 <style scoped>
     span {
-        width: 45px;
+        width: 54px;
     }
 </style>

src/components/Uptime.vue

@@ -30,6 +30,8 @@ export default {
                 return "danger"
             } else if (this.lastHeartBeat.status === 1) {
                 return "primary"
+            } else if (this.lastHeartBeat.status === 2) {
+                return "warning"
             } else {
                 return "secondary"
             }

src/mixins/socket.js

@@ -274,6 +274,11 @@ export default {
                         text: "Down",
                         color: "danger"
                     };
+                } else if (lastHeartBeat.status === 2) {
+                    result[monitorID] = {
+                        text: "Pending",
+                        color: "warning"
+                    };
                 } else {
                     result[monitorID] = unknown;
                 }

src/pages/DashboardHome.vue

@@ -90,6 +90,8 @@ export default {
                         result.up++;
                     } else if (beat.status === 0) {
                         result.down++;
+                    } else if (beat.status === 2) {
+                        result.up++;                
                     } else {
                         result.unknown++;
                     }

src/pages/EditMonitor.vue

@@ -48,6 +48,11 @@
                         <input type="number" class="form-control" id="interval" v-model="monitor.interval" required min="20" step="1">
                     </div>
 
+                      <div class="mb-3">
+                        <label for="interval" class="form-label">Retry Pings</label>
+                        <input type="number" class="form-control" id="interval" v-model="monitor.maxretries" required min="0" step="1">
+                    </div>
+
                     <div>
                         <button class="btn btn-primary" type="submit" :disabled="processing">Save</button>
                     </div>
@@ -61,7 +66,7 @@
                 <h2>Notifications</h2>
                 <p v-if="$root.notificationList.length === 0">Not available, please setup.</p>
 
-                <div class="form-check form-switch mb-3" v-for="notification in $root.notificationList">
+                <div class="form-check form-switch mb-3" :key="notification.id" v-for="notification in $root.notificationList">
                     <input class="form-check-input" type="checkbox" :id=" 'notification' + notification.id" v-model="monitor.notificationIDList[notification.id]">
 
                     <label class="form-check-label" :for=" 'notification' + notification.id">
@@ -119,6 +124,7 @@ export default {
                     name: "",
                     url: "https://",
                     interval: 60,
+                    maxretries: 0,                    
                     notificationIDList: {},
                 }
             } else if (this.isEdit) {