// ==UserScript==
// @name          InfoSoupLibraryLookup
// @namespace     http://info.infosoup.org/downloads
// @description   Check availability of materials in InfoSoup libraries when searching Amazon.com
// @include       http://*.amazon.*
// ==/UserScript==

// fixed for Firefox 1.5 and GM 0.6.4

// adapted from SPL and AADL Linky

(

function()
{

var libraryUrlPattern = 'http://www.infosoup.org/search/i?';
var libraryUrlPatternTrailer = '&submit=Search&searchscope=77';
var libraryName = 'InfoSoup';
var libraryAvailability = /AVAILABLE/;
var libraryOnOrder = /ordered for Library System/;
var libraryInProcess = /being processed for Library System/;
var libraryHolds = /(\d+) holds on first copy returned of (\d+) copies/;
var libraryDue = /DUE (\d\d\-\d\d\-\d\d)/;
var notFound = /No matches found; nearby STANDARD NOS are/

var libraryLookup = 
    {
    insertLink: function(isbn, hrefTitle, aLabel, color )
        {
        var div = origTitle.parentNode;
        var title = origTitle.firstChild.nodeValue;

        var newTitle = document.createElement('b');
        newTitle.setAttribute('class','sans');

        var titleText = document.createTextNode(title);
        newTitle.appendChild(titleText);
        
        var br = document.createElement('br');

        var link = document.createElement('a');
        link.setAttribute ( 'title', hrefTitle );
        link.setAttribute('href', libraryUrlPattern + isbn);
        link.setAttribute('style','color: ' + color);

        var label = document.createTextNode( aLabel );

        link.appendChild(label);

        div.insertBefore(newTitle, origTitle);
        div.insertBefore(br, origTitle);
        div.insertBefore(link, origTitle);
        div.removeChild(origTitle);
        },

    doLookup: function ( isbn )
        {
        GM_xmlhttpRequest
            ({
            method:'GET',
            url: libraryUrlPattern + isbn + libraryUrlPatternTrailer,
            onload:function(results)
                {
                page = results.responseText;
                if ( notFound.test(page) )
                    {
                    var due = page.match(notFound)[1]
                    libraryLookup.insertLink (
                        isbn,
                        "Not carried",
                        "Not found at an " + libraryName + " library",
                        "red"
                        );
                    }
                else if ( libraryHolds.test(page) )
                    {
                    var holds = page.match(libraryHolds)[1]
                    var due = page.match(libraryDue)[1]
                    libraryLookup.insertLink (
                        isbn,
                        holds + " Holds",
                        holds + " Holds, " + "Due back at an " + libraryName + " library on " + due,
                        "#AA7700"  // dark yellow
                        );
                    }
                else if ( libraryAvailability.test(page) )
                    {
                    libraryLookup.insertLink (
                        isbn,
                        "On the shelf now!",
                        "Available at an " + libraryName + " library!",
                        "green"
                        );
                    }
                else if ( libraryOnOrder.test(page) )
                    {
                    libraryLookup.insertLink (
                        isbn,
                        "On order!",
                        "On order at an " + libraryName + " library!",
                        "#AA7700"  // dark yellow
                        );
                    }                    
                else if ( libraryInProcess.test(page) )
                    {
                    libraryLookup.insertLink (
                        isbn,
                        "In process!",
                        "In process (available soon) at an " + libraryName + " library!",
                        "#AA7700"  // dark yellow
                        );
                    }                    

                else if ( libraryDue.test(page) )
                    {   
                    var due = page.match(libraryDue)[1]
                    libraryLookup.insertLink (
                        isbn,
			"Due back",
                        "Due back at an " + libraryName + " library on " + due,
                        "#AA7700"
                        );
                    }
                else
                    {
                    libraryLookup.insertLink (
                        isbn,
                        "Check",
                        "Check for this title at an " + libraryName + " library",
                        "orange"
                        );
                    }
                }
            });
        }


    }

try 
    { var isbn = window.content.location.href.match(/\/(\d{7,9}[\d|X])\//)[1];  }
catch (e)
    { return; }

var origTitle = document.evaluate("//b[@class='sans']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue;

if ( ! origTitle )
  { return; }

libraryLookup.doLookup(isbn);

}
)();