path: root/src/gapi.js

/* global chrome */
import LRU from "lru-cache";
const gapi_base = 'https://www.googleapis.com/calendar/v3';

const GApiError = Object.freeze({
    invalidSyncToken: Symbol("invalidSyncToken"),
    notLoggedIn: Symbol("notLoggedIn"),
    notLoggedOut: Symbol("notLoggedOut"),
    otherError: Symbol("otherError"),
});

function to_params(dict) {
    return Object.entries(dict).filter(([k, v]) => v).map(([k, v]) => `${encodeURIComponent(k)}=${encodeURIComponent(v)}`).join('&');
}

let loggedIn = null;

function _getAuthToken(interactive = false) {
    return new Promise(resolver =>
        chrome.identity.getAuthToken(
            { interactive }, token => resolver([token, !chrome.runtime.lastError])))
            .then(([token, ok]) => {
                if (ok) return token;
                else throw GApiError.notLoggedIn;
            });
}

function _removeCachedAuthToken(token) {
    return new Promise(resolver =>
        chrome.identity.removeCachedAuthToken({ token }, () => resolver()));
}

export function getLoggedIn() {
    if (loggedIn === null)
    {
        return _getAuthToken(false)
            .then(() => {loggedIn = true})
            .catch(() => {loggedIn = false; console.log("here");})
            .then(() => loggedIn);
    }
    else return Promise.resolve(loggedIn);
}

export function getAuthToken() {
    return getLoggedIn().then(b => {
        if (b) return _getAuthToken(false);
        else throw GApiError.notLoggedIn;
    });
}

export function login() {
    return getLoggedIn().then(b => {
        if (!b) return _getAuthToken(true).then(() => loggedIn = true);
        else throw GApiError.notLoggedOut;
    });
}

export function logout() {
    return getAuthToken().then(token => {
        return fetch(`https://accounts.google.com/o/oauth2/revoke?${to_params({ token })}`,
                    { method: 'GET', async: true }).then(response => {
            if (