Add manual rescan control

backend/docs/docs.go

@@ -370,7 +370,7 @@ const docTemplate = `{
         },
         "/rescan": {
             "get": {
-                "description": "Manually trigger rescan",
+                "description": "Manually trigger rescan and wait until the DB is updated",
                 "produces": [
                     "application/json"
                 ],

backend/docs/swagger.json

@@ -363,7 +363,7 @@
         },
         "/rescan": {
             "get": {
-                "description": "Manually trigger rescan",
+                "description": "Manually trigger rescan and wait until the DB is updated",
                 "produces": [
                     "application/json"
                 ],

backend/docs/swagger.yaml

@@ -345,7 +345,7 @@ paths:
       - network
   /rescan:
     get:
-      description: Manually trigger rescan
+      description: Manually trigger rescan and wait until the DB is updated
       produces:
       - application/json
       responses:

backend/internal/api/api-system.go

@@ -25,14 +25,14 @@ func getVersion(c *gin.Context) {
 
 // triggerRescan godoc
 // @Summary      Rescan all interfaces now
-// @Description  Manually trigger rescan
+// @Description  Manually trigger rescan and wait until the DB is updated
 // @Tags         system
 // @Produce      json
 // @Success      200  {string}  string  "OK"
 // @Router       /rescan [get]
 func triggerRescan(c *gin.Context) {
-	routines.ScanRestart()
-	c.Status(http.StatusOK)
+	routines.ScanNow()
+	c.IndentedJSON(http.StatusOK, "OK")
 }
 
 // getConfig godoc

backend/internal/routines/scan-routine.go

@@ -3,6 +3,7 @@ package routines
 import (
 	"sort"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/aceberg/WatchYourLAN/internal/arp"
@@ -15,9 +16,21 @@ import (
 	"github.com/aceberg/WatchYourLAN/internal/prometheus"
 )
 
+var scanMu sync.Mutex
+
+// ScanNow runs one scan immediately and waits until DB state is updated.
+func ScanNow() {
+	scanMu.Lock()
+	defer scanMu.Unlock()
+
+	foundHosts := arp.Scan(conf.AppConfig.Ifaces, conf.AppConfig.ArpArgs, conf.AppConfig.ArpStrs)
+	foundHosts = check.EnrichHosts(foundHosts)
+
+	compareHosts(newFoundHostIndex(foundHosts))
+}
+
 func startScan(quit chan bool) {
 	var lastDate, nowDate, plusDate time.Time
-	var foundHosts []models.Host
 
 	for {
 		select {
@@ -29,15 +42,16 @@ func startScan(quit chan bool) {
 
 			if nowDate.After(plusDate) {
 
-				foundHosts = arp.Scan(conf.AppConfig.Ifaces, conf.AppConfig.ArpArgs, conf.AppConfig.ArpStrs)
-				foundHosts = check.EnrichHosts(foundHosts)
-
-				compareHosts(newFoundHostIndex(foundHosts))
+				ScanNow()
 
 				lastDate = time.Now()
 			}
 
-			time.Sleep(time.Duration(1) * time.Minute)
+			select {
+			case <-quit:
+				return
+			case <-time.After(time.Duration(1) * time.Minute):
+			}
 		}
 	}
 }

frontend/src/components/Body/CardHead.tsx

@@ -1,11 +1,12 @@
-import { Show } from "solid-js";
+import { Show, createSignal } from "solid-js";
 import { editNames, selectedIDs, setEditNames } from "../../functions/exports";
 import Filter from "../Filter";
 import Search from "../Search";
 import { getHosts } from "../../functions/atstart";
-import { apiDelHost } from "../../functions/api";
+import { apiDelHost, apiRescan } from "../../functions/api";
 
 function CardHead() {
+  const [rescanning, setRescanning] = createSignal(false);
 
   const handleEditNames = (toggle: boolean) => {
     if (!toggle) {
@@ -24,6 +25,20 @@ function CardHead() {
     window.location.href = '/';
   };
 
+  const handleRescan = async () => {
+    if (rescanning()) {
+      return;
+    }
+
+    setRescanning(true);
+    try {
+      await apiRescan();
+      await getHosts();
+    } finally {
+      setRescanning(false);
+    }
+  };
+
   return (
     <div class="row">
       <div class="col-md mt-1 mb-1">
@@ -33,7 +48,18 @@ function CardHead() {
       </div>
       <div class="col-md mt-1 mb-1">
         <div class="d-flex justify-content-between">
-        <Search></Search>
+        <div class="d-flex gap-2">
+          <Search></Search>
+          <button
+            class="btn btn-outline-primary"
+            title="Rescan now"
+            onClick={handleRescan}
+            disabled={rescanning()}
+            style="width: 2.5rem;"
+          >
+            <i class={rescanning() ? "spinner-border spinner-border-sm" : "bi bi-arrow-clockwise"}></i>
+          </button>
+        </div>
         <Show
           when={editNames()}
           fallback={<button class="btn btn-outline-primary" title="Toggle edit" onClick={[handleEditNames, true]}>Edit</button>}

frontend/src/functions/api.ts

@@ -29,6 +29,12 @@ export const apiTestNotify = async () => {
   await fetch(url);
 };
 
+export const apiRescan = async () => {
+
+  const url = apiPath+'/api/rescan';
+  await fetch(url);
+};
+
 export const apiEditHost = async (id:number, name:string, known:string) => {
 
   const url = apiPath+'/api/edit/'+id+'/'+name+'/'+known;
@@ -81,4 +87,4 @@ export const apiWOL = async (mac:string) => {
   const res = await (await fetch(url)).json();
 
   return res;
-};
+};

frontend/src/functions/atstart.ts

@@ -15,7 +15,7 @@ export function runAtStart() {
 export async function getHosts() {
   const hosts = await apiGetAllHosts();
 
-  if (hosts !== null && hosts.length > 0) {
+  if (hosts !== null) {
     setAllHosts(hosts);
     setBkpHosts(hosts);
 
@@ -36,4 +36,4 @@ function listIfaces() {
   }
 
   setIfaces(ifaces);
-}
+}