// Read the Mozilla Do Not Track Field Guide
// (https://developer.mozilla.org/en-US/docs/Web/Security/Do_not_track_field_guide),
// for information on how to use the donottrack
// gathering data of actions of a user as long as it is not associated to the
// identity of that user, doNotTrack is not enabled here.

import {hasNavigator, hasWindow} from './detector';

const doNotTrackValues = ['1', 1, 'yes', true];

export function doNotTrack(): boolean {
    const checks: any[] = [];
    if (hasWindow()) {
        checks.push((<any>window).doNotTrack);
    }
    if (hasNavigator()) {
        checks.push((<any>navigator).doNotTrack, (<any>navigator).msDoNotTrack, (<any>navigator).globalPrivacyControl);
    }
    return checks.some((value) => doNotTrackValues.indexOf(value) !== -1);
}

export default doNotTrack;