// ==UserScript==
// @name PacktPub Downloader
// @namespace https://www.packtpub.com/
// @version 1.2
// @description Mass downloader to get all ebooks from personal Packt Publishing Limited library automatically.
// @supportURL https://github.com/itc-ger/packtpub-mass-downloader/issues
// @license MIT
// @contributionURL https://flattr.com/@dmo84
// @author Dirk Osburg
// @match https://www.packtpub.com/account/my-ebooks*
// @grant GM_download
// @run-at document-idle
// ==/UserScript==
/*
todo:
- hint: setup settings
*/
(function() {
'use strict';
const ERROR_NONE = 0x0;
const ERROR_NOT_ENABLED = 0x1;
const ERROR_NOT_WHITELISTED = 0x2;
const ERROR_NOT_PERMITTED = 0x4;
const ERROR_USER_ABORT = 0x8;
const ERROR_YIELD_ABORT = 0xF;
const TYPE_MASK_NONE = 0x0;
const TYPE_MASK_PDF = 0x1;
const TYPE_MASK_MOBI = 0x2;
const TYPE_MASK_EPUB = 0x4;
const TYPE_MASK_CODE = 0x8;
const TYPE_MASK_ALL = ~TYPE_MASK_NONE;
var error = ERROR_NONE;
var warning = ERROR_NONE;
var typeFilter = {"pdf":TYPE_MASK_PDF ,"mobi": TYPE_MASK_MOBI, "epub": TYPE_MASK_EPUB, "code":TYPE_MASK_CODE};
var bookContainer = document.getElementById("product-account-list").children;
var bookIterator = null;
var downloadRunning = false;
console.group("Initializing PackPub downloader");
console.info("found %c" + bookContainer.length + " books%c in personal library","color:#060;font-weight:bold","");
injectDownloadLink();
console.groupEnd();
// ##############################################
// ######## FUNCTIONS DEFINITION - BEGIN ########
// ##############################################
/* Insert Style-Element with CSS-Class into page */
function injectCssClasses() {
var style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = '@-webkit-keyframes blinker-abort { from {opacity: 1.0;} to {opacity: 0.0;} } ' +
'@-webkit-keyframes blinker-downloading { from {color: #060;} to {color: #0D0;} }' +
'' +
'.abortInfo { text-align: center; font-size: x-small !important;; font-style: italic; text-decoration: none; visibility: hidden; margin: 0px; border-width-top:0px;} ' +
'.dlLink { display:block; text-align: center; color:#FFF; background-color:#F00; font-size:x-large; margin: 0px; padding:0px 10px; border-style: solid; border-width:1px; border-width-bottom:0px; border-color:#F00; } ' +
'.dlLink:visited { color:#FFF; } ' +
'.dlLink:hover { color:#F00; background-color:#FFF; } ' +
'.dl-run-border { border-color:#060 !important; } ' +
'.dl-abort-border { border-color:#EFE012 !important; } ' +
'.dl-run { background-color: #FFF !important; color: #060 !important; text-decoration: blink; -webkit-animation-name: blinker-downloading; -webkit-animation-duration: 1.0s; -webkit-animation-iteration-count:infinite;-webkit-animation-timing-function:ease-in-out; -webkit-animation-direction: alternate; } ' +
'.dl-abort { background-color: #FFF !important; color: #EFE012 !important; text-decoration: blink; -webkit-animation-name: blinker-abort; -webkit-animation-duration: 0.5s; -webkit-animation-iteration-count:infinite;-webkit-animation-timing-function:ease-in-out; -webkit-animation-direction: alternate; } ' +
'.fileTypeChooser { line-height: normal; float:right; font-size:small; border-style:solid; border-color:#F00; } ';
document.getElementsByTagName('head')[0].appendChild(style);
}
/* Insert download link next to "My ebooks" title and add event listener */
function injectDownloadLink() {
console.debug("injecting css classes");
injectCssClasses();
console.debug("injecting download link");
var titleContainer = document.getElementById("account-right-content").firstElementChild;
titleContainer.innerHTML += '<div id="downloadAllContainer" class="fileTypeChooser">' +
'<div><a id="downloadAllLink" href="#" class="dlLink">[download all eBooks]</a></div>' +
'<div id="downloadAllAbortInfo" class="dlLink abortInfo">click to abort</div>' +
'<form id="dlFileTypes">' +
'<input type="checkbox" id="dlFileType_pdf" name="fileTypeFilter" value="pdf" checked><label for="dlFileType_pdf">PDF</label> ' +
'<input type="checkbox" id="dlFileType_epub" name="fileTypeFilter" value="epub" checked><label for="dlFileType_epub">ePub</label> ' +
'<input type="checkbox" id="dlFileType_mobi" name="fileTypeFilter" value="mobi" checked><label for="dlFileType_mobi">mobi</label> ' +
'<input type="checkbox" id="dlFileType_code" name="fileTypeFilter" value="code" checked><label for="dlFileType_code">code files</label>' +
'</form>' +
'</div>';
console.debug("add download link click event listener");
var downloadAllLink = document.getElementById("downloadAllLink");
downloadAllLink.addEventListener ("click", dlClickHandler, false);
}
function evalFileFilter() {
console.group("File type filter settings");
typeFilter.pdf = (document.getElementById("dlFileType_pdf").checked) ? TYPE_MASK_PDF : TYPE_MASK_NONE;
typeFilter.epub = (document.getElementById("dlFileType_epub").checked) ? TYPE_MASK_MOBI : TYPE_MASK_NONE;
typeFilter.mobi = (document.getElementById("dlFileType_mobi").checked) ? TYPE_MASK_EPUB : TYPE_MASK_NONE;
typeFilter.code = (document.getElementById("dlFileType_code").checked) ? TYPE_MASK_CODE : TYPE_MASK_NONE;
console.info("typeFilter: %O", typeFilter);
console.groupEnd();
}
function alterCssStyle(state) {
var container = document.getElementById("downloadAllContainer");
var link = document.getElementById("downloadAllLink");
var linkInfo = document.getElementById("downloadAllAbortInfo");
if (state == "run") {
container.classList.add("dl-run-border");
link.classList.add("dl-run-border","dl-run");
link.innerText = "[downloading]";
linkInfo.classList.add("dl-run-border","dl-run");
linkInfo.style.visibility = 'visible';
} else if (state == "abort") {
container.classList.add("dl-abort-border");
container.classList.remove("dl-run-border");
link.classList.add("dl-abort-border","dl-abort");
link.classList.remove("dl-run-border","dl-run");
link.innerText = "[aborting download]";
linkInfo.classList.add("dl-abort-border","dl-abort");
linkInfo.classList.remove("dl-run-border","dl-run");
linkInfo.style.visibility = 'hidden';
} else if (state == "normal"){
container.classList.remove("dl-run-border","dl-abort-border");
link.classList.remove("dl-run-border","dl-run","dl-abort-border","dl-abort");
link.innerText = "[download all eBooks]";
linkInfo.style.visibility = 'hidden';
linkInfo.classList.remove("dl-run-border","dl-run","dl-abort-border","dl-abort");
}
}
function dlClickHandler() {
if (downloadRunning) {
abortDownloading();
} else {
startDownloading();
}
}
/* Event listener action */
function startDownloading() {
console.group("Start downloading eBooks");
console.debug("Init book iterator");
bookIterator = iterateBooks(bookContainer);
console.debug("Reset error log");
error = ERROR_NONE; // reset errors
if (confirm("Start downloading all books automatically?") === false) {
error |= ERROR_USER_ABORT;
console.warn("Abort downloading by user [confirmation dialog canceled]");
console.groupEnd();
return;
}
console.debug("Evaluate file type filters [user form]");
evalFileFilter();
console.debug("Alter style of control container");
alterCssStyle("run");
downloadRunning = true;
console.debug("%cIterate books [startDownloading]","color:#999; font-style:italic");
bookIterator.next();
}
function abortDownloading() {
alterCssStyle("abort");
error |= ERROR_USER_ABORT;
console.warn("aborting download");
}
function endDownloading() {
alterCssStyle("normal");
downloadRunning = false;
console.debug("downloading ended");
}
/* Download callback function to handle errors */
function downloadErrorHandler(e) {
var abort = true;
switch(e.error) {
case "not_enabled":
error |= ERROR_NOT_ENABLED;
case "not_permitted":
error |= ERROR_NOT_PERMITTED;
console.warn("download error: file downloading not enabled/permitted in %cTampermonkey's settings","color:#FFF; font-weight:bold; background-color:#F00");
break;
case "not_whitelisted":
warning |= ERROR_NOT_WHITELISTED;
abort = false;
console.warn("download error: file extension not whitelistet in %cTampermonkey's settings","color:#FFF; font-weight:bold; background-color:#F00");
break;
default:
console.warn("%cunknown download error: (" + e.error + ") " + e.details, "color:#F00");
}
console.debug("%cIterate books [downloadErrorHandler]","color:#999; font-style:italic");
bookIterator.next(abort);
}
/* Download callback function to start next download if last one was finished */
function downloadFinishHandler() {
console.info("download %cfinished%c...","color:#FFF; background-color:#0A0","");
console.debug("%cIterate books [downloadFinishHandler]","color:#999; font-style:italic");
bookIterator.next();
}
/* wrapper for Tampermonkeys download function */
function downloadBook(filename, href) {
filename = filename.replace(/[<>:"\/\\|?*]+/g, '-');
console.info("downloading: %c" + filename,"color:#FFF; background-color:#060; font-weight:bold");
var retVal = GM_download({url:href, name:filename, saveAs:false, onload:downloadFinishHandler, onerror:downloadErrorHandler});
}
function getBook(elm, run) {
var title = elm.title;
var downloadLinkContainer;
try {
downloadLinkContainer = elm.lastElementChild.lastElementChild;
} catch (e) {
if (e instanceof TypeError) {
console.debug("unexpected html element, skip element...");
return null;
} else {
console.debug("unexpected error, skip element...");
return null;
}
}
if (title.length === 0 || downloadLinkContainer === null) {
console.info("no book: " + elm);
return null;
}
console.info("processing book %c %d %c '" + title + "'","color:#FFF; background-color:#666; font-weight:bold", ++run, "font-weight:bold");
return downloadLinkContainer.children;
}
function* iterateDownloadLinks(bookHrefArray, title) {
var i = 0;
var abort = false;
console.group("entering link iterator");
while (error === ERROR_NONE && i < bookHrefArray.length) {
var linkElement = bookHrefArray[i];
var linkType = linkElement.firstElementChild.lastElementChild.innerText.toLowerCase();
var linkHref = linkElement.href;
if(linkType in typeFilter && typeFilter[linkType] !== TYPE_MASK_NONE){
console.debug("typeFilter ("+linkType+"): " + typeFilter[linkType].toString(16));
downloadBook(title + "." + linkType, linkHref);
console.debug("%c[iterateDownloadLinks]yield","color:#AAA; font-style:italic");
abort = yield i++;
} else if (linkType == "code files" && typeFilter.code !== TYPE_MASK_NONE) {
console.debug("typeFilter ("+linkType+"): " + typeFilter.code.toString(16));
downloadBook(title + ".zip", linkHref);
console.debug("%c[iterateDownloadLinks]yield","color:#AAA; font-style:italic");
abort = yield i++;
} else {
console.debug("skipping fileType: " + linkType);
i++;
}
console.debug("link iterator yield: " + i);
if (abort === true) {
error |= ERROR_YIELD_ABORT;
}
}
console.groupEnd();
console.debug("%c[iterateDownloadLinks]bookIterator->next","color:#AAA; font-style:italic");
}
function* iterateBooks(booksArray) {
var i = 0;
while (error === ERROR_NONE && i < booksArray.length) {
console.group("entering book iterator");
var bookLinks = getBook(bookContainer[i], i);
var title = bookContainer[i].title;
i++;
if (bookLinks === null) {
continue;
}
var abort = yield* iterateDownloadLinks(bookLinks, title);
if (abort === true) {
error |= ERROR_YIELD_ABORT;
} /*else if (error === ERROR_NONE && confirm("download next book?") === false) {
error |= ERROR_USER_ABORT;
console.warn("Abort downloading by user [confirmation dialog canceled]");
}*/
console.groupEnd();
}
endDownloading();
console.groupEnd();
}
// ##############################################
// ######## FUNCTIONS DEFINITION - END ########
// ##############################################
})();
