import { sym } from 'rdflib';

import * as debug from '../util/debug';

/**

* find a user or app's context as set in window.SolidAppContext

* this is a const, not a function, because we have problems to jest mock it otherwise

* see: https://github.com/facebook/jest/issues/936#issuecomment-545080082 for more

* @return {any} - an appContext object

*/

export const appContext = () => {

let { SolidAppContext } = window;

SolidAppContext || (SolidAppContext = {});

SolidAppContext.viewingNoAuthPage = false;

if (SolidAppContext.noAuth && window.document) {

const currentPage = window.document.location.href;

if (currentPage.startsWith(SolidAppContext.noAuth)) {

SolidAppContext.viewingNoAuthPage = true;

const params = new URLSearchParams(window.document.location.search);

if (params) {

let viewedPage = SolidAppContext.viewedPage = params.get('uri') || null;

if (viewedPage) {

viewedPage = decodeURI(viewedPage);

if (!viewedPage.startsWith(SolidAppContext.noAuth)) {

const ary = viewedPage.split(/\//);

SolidAppContext.idp = ary[0] + '//' + ary[2];

SolidAppContext.viewingNoAuthPage = false;

}

}

}

}

}

return SolidAppContext;

};

/**

* Returns `sym($SolidTestEnvironment.username)` if

* `$SolidTestEnvironment.username` is defined as a global

* or

* returns testID defined in the HTML page

* @returns {NamedNode|null}

*/

export function offlineTestID() {

const { $SolidTestEnvironment } = window;

if (typeof $SolidTestEnvironment !== 'undefined' &&

$SolidTestEnvironment.username) {

// Test setup

debug.log('Assuming the user is ' + $SolidTestEnvironment.username);

return sym($SolidTestEnvironment.username);

}

// hack that makes SolidOS work in offline mode by adding the webId directly in html

// example usage: https://github.com/solidos/mashlib/blob/29b8b53c46bf02e0e219f0bacd51b0e9951001dd/test/contact/local.html#L37

if (typeof document !== 'undefined' &&

document.location &&

('' + document.location).slice(0, 16) === 'http://localhost') {

const div = document.getElementById('appTarget');

if (!div)

return null;

const id = div.getAttribute('testID');

if (!id)

return null;

debug.log('Assuming user is ' + id);

return sym(id);

}

return null;

}

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