udemy-go-web-2/static/js/common.js

export let card;
export let stripe;
const payButton = document.getElementById("pay-button");
export const processing = document.getElementById("processing-payment");

export function hidePayButton() {
    payButton.classList.add("d-none");
    processing.classList.remove("d-none");
}

export function showPayButton() {
    payButton.classList.remove("d-none");
    processing.classList.add("d-none");
}

export function showError(element, msg) {
    const messages = document.getElementById(element);
    messages.classList.add("alert-danger");
    messages.classList.remove("alert-success");
    messages.classList.remove("d-none");
    messages.innerText = msg;
}

export function showSuccess(element, msg) {
    const messages = document.getElementById(element);
    messages.classList.add("alert-success");
    messages.classList.remove("alert-danger");
    messages.classList.remove("d-none");
    messages.innerText = msg;
}

export function stripeInit(pubKey) {
    stripe = Stripe(pubKey);

    (function () {
        // create stripe & elements
        const elements = stripe.elements();
        const style = {
            base: {
                fontSize: '16px',
                lineHeight: '24px',
            }
        };

        // create card entry
        card = elements.create('card', {
            style: style,
            hidePostalCode: true,
        });
        card.mount("#card-element");

        // check for input errors
        card.addEventListener('change', function (event) {
            var displayError = document.getElementById("card-errors");
            if (event.error) {
                displayError.classList.remove('d-none');
                displayError.textContent = event.error.message;
            } else {
                displayError.classList.add('d-none');
                displayError.textContent = "";
            }
        });
    })();
}

export function checkAuth(api) {
    if (localStorage.getItem("token") === null) {
        location.href = "/login";
        return
    } else {
        let token = localStorage.getItem("token")
        const myHeaders = new Headers();
        myHeaders.append("Content-Type", "application/json");
        myHeaders.append("Authorization", "Bearer " + token);

        const requestOptions = {
            method: "POST",
            Headers: myHeaders,
        }

        fetch(api + "/api/is-authenticated", requestOptions)
        .then(response => response.json())
            .then(function(data) {
                if (data.error === true) {
                    console.log("not logged in");
                    location.href = "/login"
                } else {
                    console.log("Logged in");
                }
            })
    }
}