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* Copyright: ThoughtSpot Inc. 2012-2016
* Author: Shashank Singh (sunny@thoughtspot.com)
*
* @fileoverview ThoughtSpot Javascript API for use of ThoughtSpot in external webpages.
*/
// eslint-disable-next-line no-shadow
enum Events {
THOUGHTSPOT_AUTH_EXPIRED = 'ThoughtspotAuthExpired',
EXPORT_VIZ_DATA_TO_PARENT = 'exportVizDataToParent',
ALERT = 'alert',
EXPORT_VIZ_DATA_TO_CHILD = 'exportVizDataToChild',
GET_DATA = 'getData',
}
type Callback = (...args: any[]) => void;
const SSO_REDIRECTION_MARKER_GUID = '5e16222e-ef02-43e9-9fbd-24226bf3ce5b';
const EndPoints = {
AUTH_VERIFICATION: '/callosum/v1/session/info',
SSO_LOGIN_TEMPLATE: '/callosum/v1/saml/login?targetURLPath={targetUrl}',
};
let autoDeterminedThoughtspotHost = '';
const authExpirationHandlers: Callback[] = [];
let initialized = false;
let thoughtspotHost: string;
let dataCallBack: Callback;
function parseUrl(url: string) {
const parser = document.createElement('a');
parser.href = url;
return {
protocol: parser.protocol,
hostname: parser.hostname,
port: parser.port,
pathname: parser.pathname,
search: parser.search,
hash: parser.hash,
host: parser.host,
};
}
function getScriptHost() {
const scripts = document.getElementsByTagName('script');
const currentScriptNode = scripts[scripts.length - 1];
const currentScriptSrc = currentScriptNode?.src;
if (!currentScriptSrc) {
// eslint-disable-next-line no-console
console.error(
"Could not determine Thoughtspot domain from script's url",
);
return '';
}
const currentScriptSrcParts = parseUrl(currentScriptSrc);
return currentScriptSrcParts.host;
}
function formatString(
template: string,
keyValueMap: { [key: string]: string },
) {
let str = '';
Object.keys(keyValueMap).forEach((key) => {
const pattern = `\\{${key}\\}`;
const re = new RegExp(pattern, 'g');
str = template.replace(re, keyValueMap[key]);
});
return template;
}
function appendToUrlHash(url: string, stringToAppend: string) {
let outputUrl = url;
const encStringToAppend = encodeURIComponent(stringToAppend);
if (url.indexOf('#') >= 0) {
outputUrl = `${outputUrl}${encStringToAppend}`;
} else {
outputUrl = `${outputUrl}#${encStringToAppend}`;
}
return outputUrl;
}
function getAbsoluteTSUrl(tsHost: string, relativeUrl: string) {
// assume that the protocol for TS is the same as the protocol
// of the parent page. Mixed content is getting deprecated anyway
const protocol = document.location.protocol;
let path = relativeUrl;
Iif (relativeUrl[0] !== '/') {
path = `/${relativeUrl}`;
}
return formatString('{protocol}//{domain}{path}', {
protocol,
domain: tsHost,
path,
});
}
function checkIfLoggedIn(tsHost: string, callback: Callback) {
const xhr = new XMLHttpRequest();
xhr.withCredentials = true;
xhr.onreadystatechange = () => {
Eif (xhr.readyState < 4) {
return;
}
const authenticated = xhr.status === 200;
callback(authenticated);
};
const authVerificationUrl = getAbsoluteTSUrl(
tsHost,
EndPoints.AUTH_VERIFICATION,
);
xhr.open('GET', authVerificationUrl, true);
xhr.send();
}
function doSSO(tsHost: string) {
const ssoRedirectUrl = appendToUrlHash(
window.location.href,
SSO_REDIRECTION_MARKER_GUID,
);
// bring back the page to the same url
const ssoEndPoint = formatString(EndPoints.SSO_LOGIN_TEMPLATE, {
targetUrl: encodeURIComponent(ssoRedirectUrl),
});
const ssoURL = getAbsoluteTSUrl(tsHost, ssoEndPoint);
window.location.href = ssoURL;
}
function isAtSSORedirectUrl() {
return window.location.href.indexOf(SSO_REDIRECTION_MARKER_GUID) >= 0;
}
function removeSSORedirectUrlMarker() {
// Note (sunny): this will leave a # around even if it was not in the URL to
// being with, trying to remove the hash by changing window.location will reload
// the page which we don't want. We'll live with adding an unnecessary hash to the
// parent page's URL until we find any use case where that creates an issue
window.location.hash = window.location.hash.replace(
SSO_REDIRECTION_MARKER_GUID,
'',
);
}
function setUpAuthExpirationHandling(tsHost: string) {
window.addEventListener('message', (event) => {
const messageOrigin = event.origin.replace(/^https?:\/\//, '');
if (messageOrigin !== tsHost) {
return;
}
if (
!event.data ||
event.data.type !== Events.THOUGHTSPOT_AUTH_EXPIRED
) {
return;
}
// a statically embedded TS iframe might fire this
// on load even before initialization has happened
// the external page could treat this as a auto log
// out scenario and try to authenticate again, interfering
// with any ongoing initialiation.
// Hence we don't fire `notifyOnAuthExpiration` until the
// system has initialized.
if (!initialized) {
return;
}
authExpirationHandlers.forEach((authExpirationHandler) => {
authExpirationHandler();
});
});
}
function addAuthExpirationHandler(authExpirationHandler: Callback) {
const handlerAlreadySetUp =
authExpirationHandlers.indexOf(authExpirationHandler) >= 0;
Iif (handlerAlreadySetUp) {
return;
}
authExpirationHandlers.push(authExpirationHandler);
}
function initialize(
onInitialized: Callback,
onAuthExpiration: Callback,
_thoughtspotHost: string,
): void {
let tsHost = _thoughtspotHost;
Iif (_thoughtspotHost === undefined) {
autoDeterminedThoughtspotHost = getScriptHost();
tsHost = autoDeterminedThoughtspotHost;
}
thoughtspotHost = tsHost;
Iif (!thoughtspotHost) {
throw new Error(
'Invalid configuration, parameter `thoughtspotHost` ' +
'was not provided and could not be automatically deduced',
);
}
setUpAuthExpirationHandling(thoughtspotHost);
addAuthExpirationHandler(onAuthExpiration);
checkIfLoggedIn(thoughtspotHost, (isLoggedIn: boolean) => {
if (isLoggedIn) {
if (isAtSSORedirectUrl()) {
removeSSORedirectUrlMarker();
}
initialized = true;
onInitialized(true);
return;
}
// we have already tried authentication and it did not succeed, restore
// the current url to the original one and call the callback
if (isAtSSORedirectUrl()) {
removeSSORedirectUrlMarker();
initialized = true;
onInitialized(false);
return;
}
// redirect for SSO, when SSO is done this page will be loaded
// again and the same JS will execute again
doSSO(thoughtspotHost);
});
}
function notifyOnAuthExpiration(): void {
window.parent.postMessage(
{
type: Events.THOUGHTSPOT_AUTH_EXPIRED,
},
'*',
);
}
const messageCallbacks = {};
const eventHandler = {
handleEvent: (event: any) => {
// eslint-disable-next-line no-underscore-dangle
if (event.data && event.data.__type) {
// eslint-disable-next-line no-underscore-dangle
const callback = messageCallbacks[event.origin][event.data.__type];
if (typeof callback === 'function') {
callback(event);
}
}
},
};
function addSubscription(tsHost: string, type: string, callback: Callback) {
messageCallbacks[tsHost] = messageCallbacks[tsHost] || {};
messageCallbacks[tsHost][type] = callback;
window.addEventListener('message', eventHandler);
}
function subscribeToAlerts(tsHost: string, onAlertCallback: Callback): void {
let alertCallback = onAlertCallback;
Iif (typeof tsHost === 'function') {
alertCallback = tsHost;
} else {
thoughtspotHost = tsHost || thoughtspotHost;
}
addSubscription(thoughtspotHost, Events.ALERT, (event: any) => {
alertCallback(event);
});
}
function subscribeToData(responseCallback: Callback): void {
Iif (!thoughtspotHost) {
throw new Error('ThoughtSpot App needs to be initialized with a host');
}
addSubscription(
thoughtspotHost,
Events.EXPORT_VIZ_DATA_TO_PARENT,
(event: any) => {
responseCallback(event.data.data);
},
);
}
window.addEventListener('message', (event) => {
if (
// eslint-disable-next-line no-underscore-dangle
event.data.__type === Events.EXPORT_VIZ_DATA_TO_CHILD &&
event.data.data !== undefined &&
dataCallBack !== undefined &&
typeof dataCallBack === 'function'
) {
dataCallBack(event.data.data);
}
});
function requestTSAppToPushData() {
window.parent.postMessage(
{
__type: Events.GET_DATA,
},
'*',
);
}
function getCurrentData(responseCallBack: Callback): void {
dataCallBack = responseCallBack;
requestTSAppToPushData();
}
export {
initialize,
notifyOnAuthExpiration,
subscribeToAlerts,
subscribeToData,
getCurrentData,
};
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