Auth0 manager - js side - for medium article

auth0_manager.js

function createAuth0Manager(clientParameters, onAuthenticated, onAuthError) {
    return new Auth0Manager(clientParameters, onAuthenticated, onAuthError);
}

class Auth0Manager {
    constructor(clientParameters, onAuthenticated, onAuthError) {
        this.clientParameters = clientParameters;
        this.onAuthenticated = onAuthenticated;
        this.onAuthError = onAuthError;
        this.auth0Client = new auth0.WebAuth({
            domain: clientParameters['domain'],
            clientID: clientParameters['clientID'],
            redirectUri: clientParameters['redirectUri'],
            responseType: clientParameters['responseType'],
            scope: clientParameters['scope'],
        });
    }

    login() {
        var that = this;
        this.auth0Client.authorize(
            { redirectUri: this.clientParameters['redirectUri'] },
            function (err, res) {
                that.handleAuthenticationResult(that, err, res);
            }
        );
    }

    handleAuthenticationResult(that, authError, _) {
        if (authError) {
            that.onAuthError(authError);
        } else {
            that.auth0Client.parseHash(
                (err, result) => {
                    if (result && result.accessToken && result.idToken) {
                        that.onAuthenticated(result);
                    } else if (err) {
                        that.onAuthError(err)
                    }
                }
            );
        }
    }

    logout(callback) {
        this.auth0Client.logout({
            returnTo: window.location.origin,
            clientID: this.clientParameters['clientID'],
        });
        callback();
    }

    getUserInfo(accessToken, onUserInfo) {
        this.auth0Client.client.userInfo(accessToken, function (err, info) {
            onUserInfo(err, info);
        });
    }

    refreshLogin() {
        var that = this;
        this.auth0.checkSession({},
            (err, authResult) => {
                if (authResult && authResult.accessToken && authResult.idToken) {
                    that.onAuthenticated(authResult);
                } else if (err) {
                    that.onAuthError(err);
                }
            }
        );
    }
}