检查用户是否登录 MongoDB Realm Web SDK

Question

I wish to check if a user is already logged in through email/password auth via mongodb realm web-sdk. Knowing if the user is logged in will allow me to hide the loggin page from site and instead show a log out button.

So far I've successfully created a user and logged in. Using the code/methods below.

    async function registerEmailPassword(email, password) {
        try {
            const user = await app.emailPasswordAuth.registerUser({ email, password });
            return user;
        } catch (error) {
            console.error("Failed to register", error)
        }
    }

    async function loginEmailPassword(email, password) {
        // Create an email/password credential
        const credentials = Realm.Credentials.emailPassword(email, password);
        try {
          // Authenticate the user
          const user = await app.logIn(credentials);
          // `App.currentUser` updates to match the logged in user
          console.assert(user.id === app.currentUser.id);
          return user;
        } catch (error) {
          console.error("Failed to log in", error);
        }
      }

Answer 1

While going through the mongodb class documentation , I wrote the following function which appears to work.

The code is checking for if their is any user in currentUser , if their is no currentUser , their no account logged in. In the event their is a currentUser , the code then checks using currentUser.isLoggedIn if that user is logged and at the end returns a boolean value.

    async function isUserLoggedIn() {
        try {
            const userStatus = await app.currentUser;
            if (userStatus == null) {
                return false
            } else {
                const userStatus = await app.currentUser.isLoggedIn;
                return userStatus
            }
        } catch (error) {
            console.log("Failed to fetch user", error);
        }
    }

    // Check if user is logged in
    isUserLoggedIn().then((value) => {
        console.log(value);
    }).catch((error) => {
        console.log(error);
    });