feat: fix delete functionality

functions/index.js

@@ -1,32 +1,28 @@
 const functions = require("firebase-functions");
-const admin = require('firebase-admin');
+const admin = require("firebase-admin");
 admin.initializeApp();
 
 const db = admin.firestore();
 
 exports.timedLeaderboardCleanup = functions.firestore
-    .document('leaderboard/{leaderboardEntry}')
-    .onCreate((snap, context) => {
-        functions.logger.info('Document created, getting all leaderboard documents')
-        var allLeaderBoardEntries = db.collection('leaderboard').orderBy('score','desc').get().then(function(snapshot) {
-            functions.logger.info('Leaderboard contains ' + snapshot.docs.length + ' entries');
-            if(snapshot.docs.length > 10) {
-                for(var i = 10; i < snapshot.docs.length; i++) {
-                    functions.logger.info('Deleting entry number ' + (i + 1) + ' in the leaderboard');
-                    snapshot.docs[i].ref.delete()
-                        .then(function() {
-                            functions.logger.info('Delete successful');
-                            return true;
-                        })
-                        .catch(function(error) {
-                            functions.logger.error('Error in Deleting record');
-                            return false;
-                        });
-                }
-            }
-            else {
-                functions.logger.info('Leaderboard is less then 10 entries. No action taken.');
-                return true;
-            }
-        });
-    });
+  .document("leaderboard/{leaderboardEntry}")
+  .onCreate(async (_, __) => {
+    functions.logger.info(
+      "Document created, getting all leaderboard documents"
+    );
+    const snapshot = await db
+      .collection("leaderboard")
+      .orderBy("score", "desc")
+      .offset(10)
+      .get();
+
+    functions.logger.info(
+      `Preparing to delete ${snapshot.docs.length} documents.`
+    );
+    try {
+      await Promise.all(snapshot.docs.map((doc) => doc.ref.delete()));
+      functions.logger.info("Success");
+    } catch (error) {
+      functions.logger.error(`Failed to delete documents ${error}`);
+    }
+  });