Working on next alarm retrieval

ui/src/lib/alarmsingle.js

@@ -61,3 +61,28 @@ export async function getAlarmSingle(aid) {
     throw new Error((await res.json()).errmsg);
   }
 }
+
+export async function getNextAlarm() {
+  const res = await fetch(`api/alarms/next`, {headers: {'Accept': 'application/json'}})
+  if (res.status == 200) {
+    return new Date(await res.json());
+  } else {
+    throw new Error((await res.json()).errmsg);
+  }
+}
+
+export async function newNCyclesAlarm(nCycles) {
+  const res = await fetch('api/alarms/single', {
+    method: 'POST',
+    headers: {'Accept': 'application/json'},
+    body: JSON.stringify({
+      time: new Date(Date.now() + 600000 + 5400000 * nCycles)
+    }),
+  });
+  if (res.status == 200) {
+    const data = await res.json();
+    return new AlarmSingle(data);
+  } else {
+    throw new Error((await res.json()).errmsg);
+  }
+}