MangaDex reader service script for AutoPatchWork mod

autopatchwork_mangadex.js

// ==UserScript==
// @description MangaDex reader service script for AutoPatchWork mod.
// @include https://mangadex.org*
// ==/UserScript==

(function(){
var on, off, trigger;
var base_url = '',
    chapter_url = 'https://mangadex.org/chapter/',
    data_url = '',
    is_webtoon = false,
    manga_title = 'Unknown',
    manga_chapter = 0,
    current_index = 0,
    current_chapter = null,
    current_chapter_n = 0,
    is_new_chapter = false,
    next_chapter = null,
    img_array = [],
    null_chapter = 0,
    img_array_len = 0;

function copyTitleToClipboard() {
    var title = document.querySelector('.panel-title > a');
    if (!title) return;
    var range = document.createRange();
    range.selectNodeContents(title);
    var sel = window.getSelection();
    sel.removeAllRanges();
    sel.addRange(range);
    document.execCommand('copy');
}

function updateChapterVariables(nodes, url, initial) {
    var script_cue = 'var prev_chapter_id',
        scripts = nodes.querySelectorAll('script');

    //serach all embedded scripts for matching array and chapter data
    for (var text = '', i = 0; i < scripts.length; i++) {
        if (scripts[i].text.indexOf(script_cue) !== -1) {

            text = scripts[i].text;
            is_new_chapter = false;
            base_url = text.match(/var server = '([^']+)'/)[1];
            data_url = text.match(/var dataurl = '([^']+)'/)[1];
            img_array = text.replace(/'/g,'').match(/var page_array = \[([^\]]+),\]/)[1].split(',');
            img_array_len = img_array.length;
            current_index = 1;
            next_chapter = text.match(/var next_chapter_id = (\d+)/);
            next_chapter = next_chapter ? next_chapter[1] : 0;
            current_chapter = text.match(/var chapter_id = (\d+)/);
            current_chapter = current_chapter ? current_chapter[1] : 0;
            break;
        }
    }
}

function generateBody(index, url) {
    return  '<div><img id=\"current_page\" class=' + (is_webtoon ? '\"webtoon click\"' : '\"reader max-width\"') + ' src=\"'+
                base_url + data_url + '/' + img_array[index - 1] +
                '\" alt=\"image\" data-page=\"' + index + '\"/></div>';
}

function generateTitle(title, index, chapter) {
    return  (!!chapter ? (' ch.'  + chapter + ' ') : '') + 'p.' + index + ' of ' + title;
}

function updateTitle(doc) {
    var tl = doc.querySelector('title');
    if (!tl) {
        tl = document.createElement('title');
        doc.head.appendChild(tl);
    }
    tl.textContent = generateTitle(manga_title, current_index, manga_chapter);
}

function getTitle(doc) {
    var tl = doc.querySelector('[property=\"og:title\"]');
    if (tl) {
        var title = tl.content.match(/(?:Ch\. ([\d.]+) )?\((.+)\) - MangaDex/);
        if (title) {
            manga_title = title[2] ? title[2] : 'Unknown';
            manga_chapter = title[1] ? title[1].replace('.','-') : '';
        }
    }
}

function terminateAPW(event) {
    if (event) {
        if (event.detail) event.detail.link = null;
        event.preventDefault();
        event.stopPropagation();
    }
    trigger('terminated', { message: 'last chapter reached'});
    off('request');
    off('load');
    copyTitleToClipboard();
}

function handleNewPageLink(event) {
    is_new_chapter = false;
    current_index += 1;
    if (!img_array_len) { terminateAPW(event); return; }
    if (current_index <= img_array_len) {
        event.detail.norequest = true;
    } else {
        is_new_chapter = true;
        if (isChapter(next_chapter)) event.detail.link = chapter_url + next_chapter + '/' + '1';
        else { terminateAPW(event); }
    }
}

function handleNewPageLoad(event) {
    if (is_new_chapter) {
        getTitle(event.detail.htmlDoc);
        updateChapterVariables(event.detail.htmlDoc, event.detail.url, false);
    } else {
        event.detail.url = chapter_url + current_chapter + '/' + current_index;
    }
    event.detail.htmlDoc.body.innerHTML = img_array[current_index-1] ? generateBody(current_index, event.detail.url) : null;
    updateTitle(event.detail.htmlDoc);

}

function isChapter(chapter) {
    return chapter && chapter.length && chapter != null_chapter;
}

document.addEventListener('AutoPatchWork.ready', function() {
    trigger = window.AutoPatchWorked.trigger; on = window.AutoPatchWorked.on; off = window.AutoPatchWorked.off;

    is_webtoon = !!document.querySelectorAll('img.webtoon.click').length;
    if (is_webtoon || document.querySelectorAll('#current_page').length) {
        console.log('[APW; mangadex]', 'reader helper script loaded');
        updateChapterVariables(document, '', true);
        current_index = is_webtoon ? img_array_len : parseInt(location.pathname.match(/chapter\/\d+\/(\d+)/)[1], 10);
        getTitle(document);
        updateTitle(document, true);
        on('request', handleNewPageLink);
        on('load', handleNewPageLoad);
        trigger('siteinfo', {
            siteinfo : {
                url: '^https://mangadex\\.org/chapter',
                pageElement: '#current_page, img.webtoon.click',
                nextLink: 'a[href]',
                disableSeparator: true, //is_webtoon,
                cssPatch: 'img.reader { margin: 0 auto; } body { padding-top: 0!important; } nav {position:static!important;} body {background: #111!important; color: #aaa!important; border:0!important;}'
                //forceAddressChange: true // my default setting is enabled, this reverts it
            }
        });
    } else {
        console.log('[APW; mangadex]', 'pager helper script loaded');
        trigger('siteinfo', {
            siteinfo : {
                url: '^https://mangadex\\.org',
                pageElement: '.table-responsive .table tr',
                nextLink: 'li.active + .paging > a',
                forceAddressChange: true // my default setting is enabled, this reverts it
            }
        })
    }
}, false);

//if (typeof browser !== 'undefined')
    document.addEventListener('DOMContentLoaded', function() {
        //window.AutoPatchWorked.trigger('ready');
    }, false);
}());