// ==UserScript==
// @name Chicago Public Library - LibraryLookup
// @description Check book availability in Chicago Public Library. When you look at a book on Amazon.com, this script will check the Chicago Public Library catalog, then show you in the best link to get the book. Written by Nick Baker, Reference and Web Services Librarian; adapted for CPL by Mike Harris.
// @include http://www.amazon.*
// @include http://books.google.*
// ==/UserScript==
(
function()
{
var xisbnQuery = 'http://labs.oclc.org/xisbn/';
var isbnREplain = /(\d{7,9}[\dXx])/g;
var isbnREdelimited = /[^\d](\d{7,9}[\dXx])[^\dXx]/;
var isbnAlt = /ISBN[^\d](\d{7,9}[\dXx])[^\dXx]/;
var isbnTen = /ISBN\-10:[^\d](\d{7,9}[\dXx])[^\dXx]/;
var extraIsbns = [];
var scriptNumber = '18998';
var scriptVersion = '0.9'; // Use to show link if their script is out of date
// Libraries -----------------------------------------------------------
var chipub =
{
name: 'Chicago Public Library',
image: '',
createSearchUrl: function(isbn)
{
var prefix = 'http://www.chipublib.org/search/results/?keywords=&title=&author=&series=&subject=&controlNumber=&callNumber=&publisher=&range=&published=&published2=&submitButton.x=0&submitButton.y=0&submitButton=Search&location=&format=&language=&audience=allAudiences&fict=allFormats&advancedSearch=submitted&isbn=';
return prefix + isbn
},
// Get the results of a lookup - mark up the page and return true
// if there's a hit, otherwise return false.
processLookup: function(isbn, results)
{
var notFound = /produce any results/;
page = results.responseText;
if ( notFound.test(page) )
{
GM_log('couldn\'t find ' + isbn + ' at the ' + this.name);
return false;
}
else
{
return true;
}
},
} // end chipub
// End of Libraries ----------------------------------------------------
// Figure out which site the source page comes from to add a new one,
// make a new block like the "chapters" and "amazon" variables below,
// and extend the "if...else..." block at the bottom of this function.
function whichSiteIsThis()
{
var amazon =
{
getIsbn: function()
{
try
{
return location.href.match(isbnREdelimited)[1];
}
catch ( e )
{
try {
return document.body.textContent.match(isbnTen)[1];
} catch ( e ) {
return null;
}
return null;
}
},
getOriginalTitle: function()
{
// Try to figure out how Amazon has the title defined
if(document.getElementById("btAsinTitle"))
return document.getElementById("btAsinTitle");
var origTitle = document.evaluate
("//div[@class='buying']//b[@class='asinTitle']",
document,
null,
XPathResult.FIRST_ORDERED_NODE_TYPE, null
).singleNodeValue;
if(origTitle != null) return origTitle;
var origTitle = document.evaluate
("//div[@class='buying']//b[@class='sans']",
document,
null,
XPathResult.FIRST_ORDERED_NODE_TYPE, null
).singleNodeValue;
if(origTitle != null) return origTitle;
// fallback positions if we can't find the title
if(document.getElementById("jumpbar"))
return document.getElementById("jumpbar");
if(document.getElementById("priceBlock"))
return document.getElementById("priceBlock");
// Create a layer to hold note controls
try {
var libraryLinkDiv=document.createElement('div');
libraryLinkDiv.id="libraryLinkDiv";
libraryLinkDiv.style.display = 'block';
libraryLinkDiv.style.backgroundColor = '#fcf7d8';
libraryLinkDiv.style.marginTop = '6px';
libraryLinkDiv.style.padding = '6px 10px';
libraryLinkDiv.innerHTML = '<div style="float:right">' + 'Amazon has changed its layout. Please <a href="http://userscripts.org/scripts/show/7705">check for script updates</a>. ' + '<a href="javascript:void(0)" onclick="document.getElementById(\'libraryLinkDiv\').' + 'style.display=\'none\';" style="border:0px solid #000; ' + 'text-decoration:none; padding:0 3px; background-color:#fff">X</a></div>';
document.getElementsByTagName("div")[0].appendChild(libraryLinkDiv);
return libraryLinkDiv;
} catch ( e ) {
return null;
}
// nowhere to put our link!
return null;
}
}
var googleBooks =
{
getIsbn: function()
{
try
{
return location.href.match(isbnREdelimited)[1];
}
catch ( e )
{
try {
return document.body.textContent.match(isbnAlt)[1];
} catch ( e ) {
return null;
}
}
},
getOriginalTitle: function()
{
/*
//alert('finding title');
var origTitle = document.evaluate
(
"//div[@class='titlewrap']",
document,
null,
XPathResult.FIRST_ORDERED_NODE_TYPE, null
).singleNodeValue;
//alert(origTitle);
origTitle.style.overflow = 'visible';
*/
var origTitle = document.getElementById("synopsistext");
return origTitle;
}
}
// figure out what site we're looking at
if ( location.href.match(/google\.com/) )
{
// alert('google books');
return googleBooks;
}
else
{
// Amazon's pretty popular - make it the default
return amazon;
}
}
// ---------------------------------------------------------------------
var xisbnCache =
{
cache: {},
get: function(isbn)
{
if ( null == this.cache[isbn] )
{
return null;
}
else
{
return this.cache[isbn].copy()
}
},
set: function(isbns)
{
var isbn = isbns.shift();
if ( ! isbns )
{
isbns = [];
}
GM_log('caching ' + isbns.length + ' items: [' + isbns + '] for ' + isbn);
this.cache[isbn] = isbns.copy();
return this.get(isbn);
}
}
// ---------------------------------------------------------------------
var libraryLookup =
{
originalTitle: null,
infoSpan: null,
getLibrary: function()
{
return this.libraries[0];
},
insertContent: function(content)
{
if ( ! this.infoSpan )
{
this.infoSpan = document.createElement("span");
//this.infoSpan.style.display = 'block';
this.infoSpan.style.fontSize = '12px';
if(this.originalTitle.id != 'libraryLinkDiv') {
var sp = document.createElement('br');
this.originalTitle.appendChild(sp);
}
this.originalTitle.appendChild(this.infoSpan);
}
//alert(this.originalTitle);
this.infoSpan.innerHTML = content;
},
// Look up the alternate isbns for this one. Store the results in
// extraIsbns and start looking them up.
lookUpAlternates: function(isbn)
{
alts = xisbnCache.get(isbn);
if ( alts )
{
extraIsbns = alts;
libraryLookup.keepLooking();
return;
}
GM_log('loading extra ISBNs for ' + isbn);
GM_xmlhttpRequest
(
{
method: 'GET',
url: xisbnQuery + isbn,
onload: function(results)
{
var foundIsbns = results.responseText.match(isbnREplain);
extraIsbns = xisbnCache.set(foundIsbns);
GM_log('extra ISBNs = ' + extraIsbns);
libraryLookup.keepLooking();
}
}
);
},
// Lookup ISBNs from the libraryLookup.extraIsbns list. If there
// aren't any extra ISBNs left, give up in disgust. Otherwise, try
// the first ISBN. If it doesn't work out, call keepLooking again.
keepLooking: function()
{
if ( 0 == extraIsbns.length && 1 == this.libraries.length )
{
var sfxTitle = document.title.substr(12); // Knock off "Amazon.com: "
if(sfxTitle.indexOf(':') > 0) {
sfxTitle = sfxTitle.substr(0, sfxTitle.indexOf(':'));
}
var sfx = '<a target="_blank" style="text-decoration:none" ' +
'href="http://www.worldcat.org/search?q=' + originalIsbn + '&=Search&qt=owc_search">' +
'<B><U>NO</U></B>: the library does <B><I>not</I></B> own this. Click here to access the book on WorldCat for a intralibrary loan.</a>';
this.insertContent(sfx);
return;
}
else if ( 0 == extraIsbns.length )
{
GM_log('time to try a new library');
this.libraries.shift();
extraIsbns = null;
this.lookupBook(originalIsbn);
return;
}
var isbn = extraIsbns.shift();
// look up the next book
GM_xmlhttpRequest
(
{
method: 'GET',
url: libraryLookup.getLibrary().createSearchUrl(isbn),
onload: function(results)
{
var found = libraryLookup.getLibrary().processLookup(isbn, results);
if ( found )
{
var library = libraryLookup.getLibrary();
libraryLookup.insertContent('<a target="_blank" style="text-decoration:none" href="' +
library.createSearchUrl(isbn) + '">' +
'<B><U>YES</U></B>: the library <B><I>does</I></B> own this. Click here to access the book on the library website.');
GM_log('found ' + isbn + ' - no more looking');
}
else
{
libraryLookup.keepLooking();
}
}
}
)
},
// Look up an original ISBN - if this fails, fall back to the
// alternate ISBNs provided by xisbn
lookupBook: function(isbn)
{
GM_log('looking up ' + isbn + ' in the ' + this.getLibrary().name + '...');
this.insertContent('Please give me a moment while I check the library catalog ...');
GM_xmlhttpRequest
(
{
method: 'GET',
url: libraryLookup.getLibrary().createSearchUrl(isbn),
onload: function(results)
{
var found = libraryLookup.getLibrary().processLookup(isbn, results);
if ( found )
{
var library = libraryLookup.getLibrary();
libraryLookup.insertContent('<a target="_blank" style="text-decoration:none" href="' +
library.createSearchUrl(isbn) + '">' +
'<B><U>YES</U></B>: the library <B><I>does</I></B> own this. Click here to access the book on the library website.');
GM_log('found ' + isbn + ' - no more looking');
}
else
{
libraryLookup.lookUpAlternates(isbn);
}
}
}
)
},
} // end of libraryLookup
var theSite = whichSiteIsThis();
originalIsbn = theSite.getIsbn();
if ( originalIsbn )
{
GM_log('found isbn = "' + originalIsbn + '" on source page');
//alert(originalIsbn);
}
else
{
// alert('isbn not found');
return;
}
libraryLookup.originalTitle = theSite.getOriginalTitle();
if ( ! libraryLookup.originalTitle )
{
//alert('title not found');
GM_log("couldn't find the original title");
return;
}
// make sure we can copy arrays
if ( typeof Array.prototype.copy==='undefined' )
{
Array.prototype.copy = function()
{
var newArray = [];
var i = this.length;
while( i-- )
{
newArray[i] = typeof this[i].copy !== 'undefined' ? this[i].copy() : this[i];
}
return newArray;
};
}
// Change this to add, delete, or change order in which libraries are
// checked
libraryLookup.libraries = [chipub];
// libraryLookup.insertContent('Hello World');
libraryLookup.lookupBook(originalIsbn);
}
)();
