Retry joinRoom up to 5 times in the case of a 504 GATEWAY TIMEOUT

src/utils/promise.ts

@@ -68,3 +68,21 @@ export function allSettled<T>(promises: Promise<T>[]): Promise<Array<ISettledFul
         }));
     }));
 }
+
+// Helper method to retry a Promise a given number of times or until a predicate fails
+export async function retry<T, E extends Error>(fn: () => Promise<T>, num: number, predicate?: (e: E) => boolean) {
+    let lastErr: E;
+    for (let i = 0; i < num; i++) {
+        try {
+            const v = await fn();
+            // If `await fn()` throws then we won't reach here
+            return v;
+        } catch (err) {
+            if (predicate && !predicate(err)) {
+                throw err;
+            }
+            lastErr = err;
+        }
+    }
+    throw lastErr;
+}