display 'Niemand :(' if mensa.jetzt respond with empty array

src/panels/MensaJetzt/MensaJetztPanel.tsx

@@ -6,7 +6,7 @@ import PanelContent from "../../meta/PanelContent";
 type MensaJetztAPIResponse = {
   day: string,
   date: string,
-  attendance: Attendee[]
+  attendance: Attendee[],
 }
 
 type Attendee = {
@@ -14,7 +14,7 @@ type Attendee = {
   "name_modifiers": string,
   "time": string,
   "canteen": string,
-  "color": string
+  "color": string,
 }
 
 type Attendance = { [time: string]: Attendee[] }
@@ -25,11 +25,10 @@ const MensaJetztPanel = () => {
   useEffect(() => {
     const update = async () => {
       try {
-        // Request the API
         const request = await fetch(`https://mensa.jetzt/api/entries/`);
 
         if (request.status !== 200) {
-          setMarqueeContent("Niemand :(")
+          setMarqueeContent("Niemand :(");
           return;
         }
 
@@ -42,32 +41,34 @@ const MensaJetztPanel = () => {
               ...accu,
               [curr.time]: [
                 ...accu[curr.time],
-                curr
+                curr,
               ]
             }
           } else {
             return {
               ...accu,
-              [curr.time]: [curr]
+              [curr.time]: [curr],
             }
           }
         }, {});
 
         let marquee = "";
         for (const time of Object.keys(attendance).sort()) {
-          marquee += " | " + time + " : " + (attendance[time].map(a => a.name).join(", "));
+          marquee += " | " + time + " - " + (attendance[time].map(a => a.name).join(", "));
         }
 
         if (marquee !== "") {
-          marquee += " |"
+          marquee += " |";
         }
         
-        setMarqueeContent(marquee.trim())
+        marquee = marquee.trim();
+        let marqueeContent = marquee ? marquee : 'Niemand :(';
+        setMarqueeContent(marqueeContent);
 
       }
       catch (e) {
         console.warn("mensa.jetzt not showing data because", e);
-        setMarqueeContent("Niemand :(")
+        setMarqueeContent("Niemand :(");
       }
     }