// ==UserScript==
// @name         PTP Box Office Detector V2
// @namespace    PTPBOD_abc123
// @version      0.2b
// @description  Finds a film's box office information when possible
// @author       abc123
// @include      https://passthepopcorn.me/torrents.php?id=*
// @grant        GM_xmlhttpRequest
// @connect      www.imdb.com
// ==/UserScript==

/*****************
 * AUTHOR'S NOTE *
 *****************
 * This script is designed for fetching box office information for any
 * given movie being viewed on PassThePopcorn. It does this by querying
 * IMDB and pulling their Box Office data.
 *
 * Big thanks to HostileThingy to made a version of this that works with
 * wikipedia.
 */

/***********
 * OPTIONS *
 ***********/

// uncomment (or add) values you wish to hide
var boHideArr = [];
// boHideArr.push('Budget');
// boHideArr.push('Opening Weekend USA');
// boHideArr.push('Gross USA');
// boHideArr.push('Worldwide Gross');

/*****************
 * FUNCTIONALITY *
 *****************/

function queryIMDB(imdbId) {
    GM_xmlhttpRequest({
        method: 'GET',
        url: 'https://www.imdb.com/title/tt'+ imdbId,
        onload: parseIMDB
    });
}

function parseIMDB(response) {
    var domparser = new DOMParser();
    var doc = domparser.parseFromString(response.responseText, 'text/html');
    if ( typeof doc !== 'object' ) return false;

    // get movie info panel of PTP
    var parentEl = document.querySelector('#movieinfo > .panel__body');
    if ( ! parentEl ) return false;

    // find detail area of IMDB
    var details = doc.querySelector('#titleDetails');
    if ( ! details ) return false;

    var inBO = false;
    var detail = details.querySelectorAll('.subheading, div.txt-block');
    // NOTE: forEach on nodeList won't work on early browsers... use Array.prototype
    detail.forEach(function(node) {
        if ( node.classList.contains('subheading') ) {
            inBO = !! (node.innerText === 'Box Office');
            return false;
        }

        if ( inBO ) {
            appendIMDBInfo(parentEl, node);
        }
    });
}

function appendIMDBInfo(parentEl, node) {

    // find box office label
    var labelSrc = node.querySelector('h4');
    if ( ! labelSrc ) return false;
    var label = labelSrc.innerText;
    node.removeChild(labelSrc);

    // find box office detail (extra info)
    var detailSrc = node.querySelector('span');
    if ( detailSrc ) {
        node.removeChild(detailSrc);
    }

    var value = node.innerText;

    // do any extra display modifications here
    label = label.replace(/Cumulative /, '');
    value = value.replace(/,\s*$/, '');

    // only show budget and worldwide gross
    if ( ~boHideArr.indexOf(label.replace(':','')) ) return false;

    // output to screen
    var labelDiv = document.createElement('div');
    var labelStrong = document.createElement('strong');
    labelStrong.innerHTML = label;
    labelDiv.appendChild(labelStrong);
    labelDiv.innerHTML += value;
    parentEl.appendChild(labelDiv);
}

(function() {
    'use strict';

    var imdbLink = document.getElementById('imdb-title-link');
    if ( ! imdbLink ) return false;

    var imdbMatch = imdbLink.href.match(/tt(\d+)/);
    if ( ! imdbMatch ) return false;

    queryIMDB(imdbMatch[1]);
})();