add link to download all ebooks from personal packpub library automaticly.
当前为
// ==UserScript==
// @name PacktPub Downloader
// @namespace https://www.packtpub.com/
// @version 1.0
// @description add link to download all ebooks from personal packpub library automaticly.
// @supportURL https://github.com/itc-ger/packtpub-mass-downloader/issues
// @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;
console.debug("found " + bookContainer.length + " books");
var bookIterator = null;
injectDownloadLink();
// ##############################################
// ######## FUNCTIONS DEFINITION - BEGIN ########
// ##############################################
/* Insert Style-Element with CSS-Class into page */
function injectCssClasses() {
var style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = '.dlLink { color:#FFF; background-color:#F00;float:right;font-size:x-large; padding:0px 10px; } ' +
'.dlLink:visited { color:#FFF; } ' +
'.dlLink:hover { color:#F00; background-color:#FFF; border-style: solid; border-width:1px; border-color: #F00; } ' +
'.fileTypeChooser { 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() {
injectCssClasses();
var titleContainer = document.getElementById("account-right-content").firstElementChild;
titleContainer.innerHTML += '<div class="fileTypeChooser">' +
'<a id="downloadAllLink" href="#" class="dlLink">[download all eBooks]</a><br/>' +
'<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>';
var downloadAllLink = document.getElementById("downloadAllLink");
downloadAllLink.addEventListener ("click", startDownloading, false);
}
function evalFileFilter() {
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;
}
/* Event listener action */
function startDownloading() {
bookIterator = iterateBooks(bookContainer);
error = ERROR_NONE; // reset errors
if (confirm("Start downloading all books automaticly?") === false) {
error |= errorUserAbort;
return;
}
evalFileFilter();
console.debug("[startDownloading]bookIterator->next");
bookIterator.next();
}
/* 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.debug("download error: file downloading not enabled/permitted in Tampermonkey's settings");
break;
case "not_whitelisted":
warning |= ERROR_NOT_WHITELISTED;
abort = false;
console.debug("download error: file extension not whitelistet in Tampermonkey's settings");
break;
default:
console.debug("unknown download error: (" + e.error + ") " + e.details);
}
console.debug("[downloadErrorHandler]bookLinks->next");
bookIterator.next(abort);
}
/* Download callback function to start next download if last one was finished */
function downloadFinishHandler() {
console.debug("download finished...");
console.debug("[downloadFinishHandler]bookLinks->next");
bookIterator.next();
}
/* wrapper for Tampermonkeys download function */
function downloadBook(filename, href) {
console.debug("downloading: " + filename + "...");
var retVal = GM_download({url:href, name:filename, saveAs:false, onload:downloadFinishHandler, onerror:downloadErrorHandler});
}
function getBook(elm) {
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.debug("no book: " + elm);
return null;
}
console.debug("processing book '" + title + "'");
return downloadLinkContainer.children;
}
function* iterateDownloadLinks(bookHrefArray, title) {
var i = 0;
var abort = false;
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("[iterateDownloadLinks]yield");
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);
abort = yield i++;
} else {
console.debug("skipping fileType: " + linkType);
i++;
}
console.debug("link iterator yield: " + i);
if (abort === true) {
error |= ERROR_YIELD_ABORT;
}
}
console.debug("[iterateDownloadLinks]bookIterator->next");
}
function* iterateBooks(booksArray) {
var i = 0;
console.debug("entering iterator");
while (error === ERROR_NONE && i < booksArray.length) {
var bookLinks = getBook(bookContainer[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 (confirm("download next book?") === false) {
error |= ERROR_USER_ABORT;
}*/
}
}
// ##############################################
// ######## FUNCTIONS DEFINITION - END ########
// ##############################################
})();