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Paxae3 / DDL@ScanLibs.com

// ==UserScript==
// @name        DDL@ScanLibs.com
// @namespace   DDL@ScanLibs.com
// @description Enables direct/faster downloads of ebooks on ScanLibs.com - collects and delegates download links to JDownloader (needs to run in background)
// @updateURL   https://openuserjs.org/meta/Paxae3/DDLScanLibs.com.meta.js
// @include     http://scanlibs.com/*
// @icon        http://scanlibs.com/favicon.png
// @require     https://code.jquery.com/jquery-3.1.1.min.js
// @author      Paxae3
// @version     1.0
// @copyright   2017, Paxae3
// @license     MIT License
// @grant       none
// ==/UserScript==

var logging = false;
var jCount  = 0;

//
// logs param into console, depending on global logging value
//
function log(text) 
{
  if(!logging)return;
  console.log("DDL@scanlibs.com:"+text);  
}

//
// counts link-counter up and updates GUI
//
function addCount()
{
  $("#jdown > span").html(""+(++jCount));
}

//
// processes AJAX-data of overview-page
//
function handleOverview(data, url)
{
  // getting ad-page link(s)
  if (jQuery(data).find('span.mybtn.mylink').length == 1)
  {
    $("#clipboardInput").append(" "+getTargetUrlFromDataUrl(jQuery(data).find('span.mybtn.mylink').attr('data-url')));
 
    log('ajax_performed:found_one_file_link:');
    $('[url=\'' + url + '\']').css('color', 'green');
    
    addCount();
    return true;
  } 
  else if (jQuery(data).find('span.mylink').length >= 1)
  {
    var i=0;
    jQuery(data).find("span.mylink").each(function()
                                          { 
                                            i++;
                                            $("#clipboardInput").append(" "+getTargetUrlFromDataUrl($(this).attr("data-url")));   
                                            addCount();
                                          }); 
    
    log('ajax_performed:found_multiple_file_links:'+i);
    $('[url=\'' + url + '\']').css('color', 'green');
    
    return true;
  }
  log('ajax_performed:found_no_file_links');
  $('[url=\'' + url + '\']').css('color', 'red');
  return false;
}

//
// extracts target-url out of base64 encoded data-url
//
function getTargetUrlFromDataUrl(dataUrl)
{
  log('extract:start:' + dataUrl);
  
  // strip prefix  
  var ret = dataUrl.substr(dataUrl.indexOf('/') + 1);
  log('extract:unprefix:' + ret);
  
  // get full url
  ret = atob(ret);
  log('extract:decode:' + ret);
  
  // extract target url
  ret = ret.substr(ret.lastIndexOf('http'));
  log('extract:finish:' + ret);
  
  return ret
}

//
// selects all entries of textarea and copy them into clipboard
//
function clipboardCallback()
{
  $("#clipboardInput").select();
  log('clipboard:selected');
  
  document.execCommand('copy');
  log('clipboard:copied');
  
  jCount = -1;
  addCount();
  
  // delete content of textarea after 2 seconds
  window.setTimeout(function(){ $("#clipboardInput").html(""); document.execCommand('copy');}, 2000);  
}
  
log('START');
// START
//
// Setting actions into buttons (only when in root of page)
if ((window.location.pathname == '/')  || (window.location.pathname.indexOf("/page/")==0 ))
{
  log('buttons:init');
  
  // adding input field
  $("body").prepend('<textarea id="clipboardInput" style="position:fixed;top:0px;left:-100px;height:50px;width:50px;"></textarea>');
  
  // switching buttons
  $(".read-more").each(function(){$(this).before('<span class="btn btn-default read-more" url="'+$(this).attr("href")+
                                                '" style="margin-left:20px;">Download</span>');});  
  
  // add copy-to-jdownloader-field
  $("body").prepend('<div style="position:fixed;right:5px;top:5px;width:100px;height:105px;z-index:999;box-shadow: 5px 5px 5px #2F4F4F;border: 1px solid black;" class="btn btn-default" id="jdown">'+
                    '<img src="http://www.freeiconspng.com/uploads/jdownloader-icon-2.png" /><br /><span>0</span></div>');
  $("#jdown").click(clipboardCallback);
  
  // adding events on buttons
  $('span.read-more').click(function ()
  {
    log('button:click');
    
    // button-text in "pending" orange
    $(this).css('color', 'orange');
    
    log('ajax_start:' + $(this).attr('url'));
    
    // Getting Overview page    
    $.get($(this).attr('url'), function (data) 
                                {
                                  handleOverview(data, $(this).attr('url'))
                                }).fail(
                              function ()
                                {
                                  log('ajax:failed');
                                  $(this).css('color', 'red');
                                });
    });
}