// BarcodeListal
// version 0.5
// 2005-12-13
// Copyright (c) 2007, Benjamin Beckwith
// Released under the GPL license
// http://www.gnu.org/copyleft/gpl.html
//
// Portions used from kittycode.js
// Copyright (c) 2000 Dustin Sallings dustin@spy.net
//
// --------------------------------------------------------------------
//
// This is a Greasemonkey user script. To install it, you need
// Greasemonkey 0.3 or later: http://greasemonkey.mozdev.org/
// Then restart Firefox and revisit this script.
// Under Tools, there will be a new menu item to "Install User Script".
// Accept the default configuration and install.
//
// --------------------------------------------------------------------
// 0.5 bnb
// Added support for regular barcode entry as well
// 0.1 bnb
// Initial Version
//
// --------------------------------------------------------------------
//
//
// ==UserScript==
// @name Barcode Listal
// @namespace http://whitebucket.com/barcodelistal
// @description Script to use the CueCat barcode scanner to input fields into Listal. Also allows regular barcode entry
// @include http://www.listal.com/add/*
// @include http://www.listal.com/addasin/*
// ==/UserScript==
// Be informative for older versions of Greasemonkey
if (!GM_xmlhttpRequest) {
alert('Please upgrade to the latest version of Greasemonkey.');
return;
}
// Put in a menu command to set/reset the AWS ID
if (!GM_registerMenuCommand) {
alert('Please upgrade to the latest version of Greasemonkey.');
return;
}else{
GM_registerMenuCommand("(Re)set AWS ID",setAWSID);
}
// Check for an AWS id
if (!GM_getValue('awsid')) {
// Set the AWS id
setAWSID();
}
// Get the stored AWS id
var awsid = GM_getValue('awsid');
// Default message to display next to entry field
var default_message = ' CueCat Or Barcode [Add to Collection]';
// Prompt the user for an AWS (Amazon Web Services) id and store it
// for future use
function setAWSID() {
var id = prompt("What Amazon Web Services ID would you like to use?");
GM_setValue('awsid', id);
}
// Create a regular expression to help determine the context
var ctx_reg = new RegExp("add\/(music|books|games|dvd)");
// Try to guess the context based on the window location
// and then store the context for future use.
// This is useful when entering in multiple items
if(ctx_reg.test(window.location.href)){
var ar = ctx_reg.exec(window.location.href);
if(ar[1] == 'music'){ GM_setValue('Context','Music');}
if(ar[1] == 'books'){ GM_setValue('Context','Books');}
if(ar[1] == 'dvd' ){ GM_setValue('Context','DVD');}
if(ar[1] == 'games'){ GM_setValue('Context','VideoGames');}
}
// If the context is unset, set it to books by default
if(!GM_getValue('Context')){
CCL_Context = 'Books';
GM_setValue('Context',CCL_Context);
}
// Grab the set context
var CCL_Context = GM_getValue('Context');
// Create a new <div> element
var cc_div = document.createElement("div");
// Put the following into the newly created <div>:
// 1. Select box to change context
// 2. Entry field for CueCat data or barcode
// 3. A <span> element for output messages
cc_div.innerHTML = '<div id="cc_div"><select id="CCL_CONTEXT"><option value="DVD" id="CCL_DVD">DVDs</option><option value="Books" id="CCL_Books">Books</option><option value="Music" id="CCL_Music">Music</option><option value="VideoGames" id="CCL_VideoGames">Games</option></select> Type of item to add.<BR><input type=text id="cc_input"><span id="CCL_MSG" style="margin: 2px 0 1px 0;">'
+default_message
+'</span></div>';
// The field for entering in an Amazon asin is named 'asin'
// A reference to that element is created here
asin = document.getElementsByName('asin')[0];
// If a valid reference was obtained,
// then insert the <div> created above before the
// original form
if (asin) {
form = asin.parentNode;
form.parentNode.insertBefore(cc_div,form);
}
// Grab a reference to our context <select> element
csel = document.getElementById('CCL_CONTEXT');
// Add a handler to the 'change' event
// This will save a new context if a user changes it via the select box
csel.addEventListener('change',ccls_change,false);
// 'Select' our saved context
document.getElementById('CCL_' + CCL_Context).selected = true;
// Handler to the context <select> element.
// Saves the context if a user changes it
function ccls_change() {
GM_setValue('Context',csel.childNodes[csel.selectedIndex].value);
}
// Grab a reference to the input text box.
// This is where the user inputs the CueCat data or barcode
ci = document.getElementById('cc_input');
// If a valid reference was gathered,
// add a handler to the 'change' event
// and
// set the focus to this text box
if(ci){
ci.addEventListener('change',cc_change,false);
ci.focus();
}
// Handle the changes to the input box
// If a CueCat string is detected, decode the parts of the string and pass them on
// If it is not a CueCat string, then it is assumed to be an UPC string and is passed
// on as such
function cc_change() {
if(ci.value.length >0) {
if(ci.value[0] == '.') {
getASIN(decodePart(ci.value.split('.')[3]),decodePart(ci.value.split('.')[2]));
} else {
getASIN(ci.value,'UPC');
}
}
}
// Here is the attempt to retrieve the Amazon ASIN.
// This function does the following:
// 1. Gets the current context so the correct Amazon store can be queried
// 2. Writes a message to the message <span> to provide feedback to the user
// 3. Builds up a request url based on awsid,upc,type and context
// 4. Launch the request and provide a callback function
// a. This request returns immediately here and uses the callback upon completion
// b. The callback function is 'handleResponse'
function getASIN(upc,type) {
if(type == 'C39') {
}
if(type == 'UA5') {
upc = checkISBN(upcISBNmap(upc.substr(0,6)) + upc.substr(12,5));
window.location.href = 'http://www.listal.com/addasin/?asin='+upc+'&collection=Add+to+collection';
return;
}
if(type == 'IBN' || type == 'IB5') {
// Then this is an ISBN and can be redirected straight to the addition page.
window.location.href = 'http://www.listal.com/addasin/?asin='+checkISBN(upc.substr(3,9))+'&collection=Add+to+collection';
return;
}
// This type, UA2, needs to have the two end characters removed.
if(type == 'UA2') {
upc = upc.substr(0,upc.length-2);
}
context = GM_getValue('Context');
request_url = 'http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&AWSAccessKeyId='
+awsid
+'&Operation=ItemLookup&ItemId='
+upc
+'&IdType=UPC&SearchIndex='
+ context;
document.getElementById('CCL_MSG').innerHTML = 'Getting Amazon info for:' + upc;
GM_xmlhttpRequest({
method: 'GET',
url: request_url,
headers: {
'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
'Accept': 'application/atom+xml,application/xml,text/xml',
},
onload: handleResponse
});
}
// This function handes the data returned from the Amazon query
// The data returned is in XML format and is easily parsed.
// This function performs the following:
// 1. Parses the XML into a DOM
// 2. Checks for an error
// a. Errors are detected by looking for a <ErrorMsg> element
// b. Error messages are then written out to the screen
// 3. If there are no errors it tries to locate the ASIN
// a. If found, change the window locatin to submit to Listal
// b. If not found, show an alert
function handleResponse(responseDetails) {
var parser = new DOMParser();
var dom = parser.parseFromString(responseDetails.responseText,
"application/xml");
var entries = dom.getElementsByTagName('Error');
if(entries.length > 0) {
document.getElementById('CCL_MSG').innerHTML = 'Error Encountered: ' + entries[0].getElementsByTagName("Message")[0].textContent;
} else {
entries = dom.getElementsByTagName('ASIN');
if(entries.length == 1){
window.location.href = 'http://www.listal.com/addasin/?asin='+entries[0].textContent+'&collection=Add+to+collection';
}else{
document.getElementById('CCL_MSG').innerHTML = 'Error Encountered: More than one item matched.';
}
}
}
// The methods below are taken or derived from kittycode.js
// Copyright (c) 2000 Dustin Sallings dustin@spy.net
function decodePart(str) {
var m = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+-";
var result = "";
var packer = 0;
var count = 0;
var i = 0;
for (i=0; i < str.length; i++) {
// Get the offset to the current character in our map
var x = m.indexOf(str.charAt(i));
// For invalid characters, point them out really well!
if(x<0) {
result += " > " + str.charAt(i) + " < ";
continue;
}
// only count valid characters...why not?
count++;
// Pack them bits.
packer = packer << 6 | x
// every four bytes, we have three valid characters.
if (count == 4) {
result += String.fromCharCode((packer >> 16) ^ 67);
result += String.fromCharCode((packer >> 8 & 255) ^ 67);
result += String.fromCharCode((packer & 255) ^ 67);
count=0; packer=0;
}
}
// Now, deal with the remainders
if(count==2) {
result += String.fromCharCode((( (packer << 12) >> 16) ^ 67));
} else if(count == 3) {
result += String.fromCharCode(( (packer << 6) >> 16) ^ 67);
result += String.fromCharCode(( (packer << 6) >> 8 & 255) ^ 67);
}
return result;
}
function checkISBN(str) {
var i;
var sum = 0;
var len = str.length;
var result = "";
if ((len>10) | (len<9) ) {
return result = "INVALID";
} else {
len=9;
}
for (i=0; i<len; i++) {
sum += (i+1)* (str.charCodeAt(i)- 48);
}
result = sum % 11;
str = str.substr(0,9);
if (result==10) {
str+="X";
} else {
str+= result;
}
return str;
}
function upcISBNmap(str) {
var upcisbn=[
"014794","08041",
"018926","0445",
"027778","0449",
"037145","0812",
"042799","0785",
"043144","0688",
"044903","0312",
"045863","0517",
"046594","0064",
"047132","0152",
"051487","08167",
"051488","0140",
"060771","0002",
"065373","0373",
"070992","0523",
"070993","0446",
"070999","0345",
"071001","0380",
"071009","0440",
"071125","088677",
"071136","0451",
"071149","0451",
"071152","0515",
"071162","0451",
"071268","08217",
"071831","0425",
"071842","08439",
"072742","0441",
"076714","0671",
"076783","0553",
"076814","0449",
"078021","0872",
"079808","0394",
"090129","0679",
"099455","0061",
"099769","0451",
"076783","0553"
];
// "076783","0770", // McClelland-Bantam or?? "0553",
var j;
var result="";
for (j=0; j<upcisbn.length; j+=2) {
if (upcisbn[j]==str) {
result=upcisbn[j+1];
break;
}
}
if (result=="")
result=str;
return(result);
}
