From e76ab5e42696caa8ef7dc667918bc6eaea729d16 Mon Sep 17 00:00:00 2001
From: t104360088 <z8631989816@gmail.com>
Date: Thu, 25 Mar 2021 11:40:04 +0800
Subject: [PATCH] Use batch to delete firestore's data

---
 public/app.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/public/app.js b/public/app.js
index 4e3b4d6..6fa8ac6 100644
--- a/public/app.js
+++ b/public/app.js
@@ -224,16 +224,18 @@ async function hangUp(e) {
   // Delete room on hangup
   if (roomId) {
     const db = firebase.firestore();
+    const batch = db.batch();
     const roomRef = db.collection('rooms').doc(roomId);
     const calleeCandidates = await roomRef.collection('calleeCandidates').get();
-    calleeCandidates.forEach(async candidate => {
-      await candidate.ref.delete();
+    calleeCandidates.forEach(candidate => {
+      batch.delete(candidate.ref);
     });
     const callerCandidates = await roomRef.collection('callerCandidates').get();
-    callerCandidates.forEach(async candidate => {
-      await candidate.ref.delete();
+    callerCandidates.forEach(candidate => {
+      batch.delete(candidate.ref);
     });
-    await roomRef.delete();
+    batch.delete(roomRef);
+    await batch.commit();
   }
 
   document.location.reload(true);