Refactor signing out devices to handle React 18 Strict Mode

setSigningOutDeviceIds was adding the same device ID twice, and also possibly using an old reference to the value when updating it

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/settings/tabs/user/SessionManagerTab.tsx

@@ -9,6 +9,7 @@ Please see LICENSE files in the repository root for full details.
 import React, { lazy, Suspense, useCallback, useContext, useEffect, useMemo, useRef, useState } from "react";
 import { discoverAndValidateOIDCIssuerWellKnown, MatrixClient } from "matrix-js-sdk/src/matrix";
 import { logger } from "matrix-js-sdk/src/logger";
+import { defer } from "matrix-js-sdk/src/utils";
 
 import { _t } from "../../../../../languageHandler";
 import Modal from "../../../../../Modal";
@@ -108,31 +109,33 @@ const useSignOut = (
             }
         }
 
+        let success = false;
         try {
-            setSigningOutDeviceIds([...signingOutDeviceIds, ...deviceIds]);
-
-            const onSignOutFinished = async (success: boolean): Promise<void> => {
-                if (success) {
-                    await onSignoutResolvedCallback();
-                }
-                setSigningOutDeviceIds(signingOutDeviceIds.filter((deviceId) => !deviceIds.includes(deviceId)));
-            };
+            setSigningOutDeviceIds((signingOutDeviceIds) => [...signingOutDeviceIds, ...deviceIds]);
 
             if (delegatedAuthAccountUrl) {
                 const [deviceId] = deviceIds;
                 try {
-                    setSigningOutDeviceIds([...signingOutDeviceIds, deviceId]);
-                    const success = await confirmDelegatedAuthSignOut(delegatedAuthAccountUrl, deviceId);
-                    await onSignOutFinished(success);
+                    success = await confirmDelegatedAuthSignOut(delegatedAuthAccountUrl, deviceId);
                 } catch (error) {
                     logger.error("Error deleting OIDC-aware sessions", error);
                 }
             } else {
-                await deleteDevicesWithInteractiveAuth(matrixClient, deviceIds, onSignOutFinished);
+                const deferredSuccess = defer<boolean>();
+                await deleteDevicesWithInteractiveAuth(matrixClient, deviceIds, async (success) => {
+                    deferredSuccess.resolve(success);
+                });
+                success = await deferredSuccess.promise;
             }
         } catch (error) {
             logger.error("Error deleting sessions", error);
-            setSigningOutDeviceIds(signingOutDeviceIds.filter((deviceId) => !deviceIds.includes(deviceId)));
+        } finally {
+            if (success) {
+                await onSignoutResolvedCallback();
+            }
+            setSigningOutDeviceIds((signingOutDeviceIds) =>
+                signingOutDeviceIds.filter((deviceId) => !deviceIds.includes(deviceId)),
+            );
         }
     };