cookieguard/src/Cookieguard.js

Handle third party services in compliance with the GDPR

import { tap } from './helpers.js';
import PostMessage from './PostMessage.js';

export default class Cookieguard {
    constructor(modules) {
        this.modules = modules || {};
        this.messenger = new PostMessage(this);

        this.fetchSettings();
        this.hydrate();
    }

    isExpired() {
        if (!this.settings.hasOwnProperty('expires')) {
            return true;
        }

        return parseInt(this.settings.expires) <= new Date().getTime();
    }

    fetchSettings() {
        let settings = window.localStorage.getItem('_jar');
        this.settings = settings ? JSON.parse(settings) : {};
    }

    hydrate() {
        if (!this.isExpired()) {
            this.handle(this.settings.modules);
        }
    }

    enable(keys) {
        this.update(
            [...this.settings.modules, ...keys],
            parseInt(this.settings.expires)
        );
    }

    disable(keys) {
        this.update(
            this.settings.modules.filter(key => !keys.includes(key)),
            parseInt(this.settings.expires)
        );
    }

    static post() {
        return PostMessage;
    }

    update(modules, expires) {
        let now = new Date();

        expires = expires || now.setDate(now.getDate() + 14);

        this.settings = { modules, expires };

        window.localStorage.setItem('_jar', JSON.stringify(this.settings));

        this.handle(modules);
    }

    handle(keys) {
        let modules = Object.keys(this.modules);

        keys = keys || [];

        modules
            .filter(item => keys.includes(item))
            .map(key => tap(this.modules[key], module => module.enable()));

        modules
            .filter(item => !keys.includes(item))
            .map(key => tap(this.modules[key], module => module.disable()));
    }
}