For lazzzy app

data_structure.js

///////////////////////////////////////////////////////////////////

/**
 * currentPages is an array of objects which holds each active page
 * on the browser.
 *
 * page: {
 *  id: <string>,
 *  url: <string>,
 *  author: <string>,
 *  favorite: <bool>,
 *  metaImage: <string>,
 *  isShown: <boolean>,
 *  content: <array>,
 *  progress: <progress>,
 * }
 *
 * progress: {
 *  percentLeft: <number>,
 *  currentPosition: <number>,
 *  timeRemaining: <number>
 *  lastActive: <timestamp>,
 * }
 *
 * content: {
 *  id: <string>,
 *  type: <string>, // bookmark || comment
 *  title: <string>,
 *  createdAt: <timestamp>,
 *  progress: <progress>
 * }
 *
 * We'll check for each page (by id) on page load,
 * if available we'll show the bookmarks (isShown: true),
 */