public/linkblue-relay.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>DanceBlue Login Relay</title>
</head>

<body>
    <p>You will be redirected in a moment</p>

    <!-- <script src="/__/firebase/8.10.1/firebase-app.js"></script>
    <script src="/__/firebase/8.10.1/firebase-auth.js"></script> -->
    <script src="https://www.gstatic.com/firebasejs/8.10.1/firebase-app.js"></script>
    <script src="https://www.gstatic.com/firebasejs/8.10.1/firebase-auth.js"></script>

    <script>
        function setCookie(cname, cvalue, exdays) {
            const d = new Date();
            d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
            let expires = "expires=" + d.toUTCString();
            document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/;SameSite=Strict";
        }

        function getCookie(cname) {
            let name = cname + "=";
            let decodedCookie = decodeURIComponent(document.cookie);
            let ca = decodedCookie.split(';');
            for (let i = 0; i < ca.length; i++) {
                let c = ca[i];
                while (c.charAt(0) == ' ') {
                    c = c.substring(1);
                }
                if (c.indexOf(name) == 0) {
                    return c.substring(name.length, c.length);
                }
            }
            return "";
        }

        function getUrlParameter(name) {
            name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
            var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
            var results = regex.exec(location.search);
            return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
        };

        var firebaseConfig = {
            apiKey: "AIzaSyDxKegAvCRvnZR-FQxl2EKBQoZr04TfCyc",
            authDomain: "react-danceblue.firebaseapp.com",
            databaseURL: "https://react-danceblue.firebaseio.com",
            projectId: "react-danceblue",
            storageBucket: "react-danceblue.appspot.com",
            messagingSenderId: "480114538491",
            appId: "1:480114538491:web:62aac53817d2c43ba2bd5e",
        };

        firebase.initializeApp(firebaseConfig);

        if (getCookie('danceblue-relay-redirecting')) {
            document.cookie = "danceblue-relay-redirecting=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/; SameSite=Strict";

            let linkingUri = getUrlParameter('linkingUri');

            firebase.auth().getRedirectResult()
                .then((result) => {
                    // IdP data available in result.additionalUserInfo.profile.
                    // ...

                    /** @type {firebase.auth.OAuthCredential} */
                    var credential = result.credential;
                    window.location.replace(`${linkingUri}?token=${encodeURI(JSON.stringify(credential.toJSON()))}`);
                })
                .catch((error) => {
                    // Handle error.
                });
        } else {
            var provider = new firebase.auth.OAuthProvider('microsoft.com');
            provider.setCustomParameters({
                tenant: "2b30530b-69b6-4457-b818-481cb53d42ae",
                domain_hint: "uky.edu",
            });
            provider.addScope('openid');
            provider.addScope('profile');
            provider.addScope('email');
            provider.addScope('offline_access');
            provider.addScope('User.Read');

            setCookie('danceblue-relay-redirecting', 'true', 0.042);

            firebase.auth().signInWithRedirect(provider);
        }

    </script>
</body>

</html>