/**
* Picasa Webalbum Integration Library
* This library was inspired and based on pwa by Dieter Raber (http://www.gnu.org/copyleft/lesser.html)
* @name pwi-0.2.js
* @author Jeroen Diderik - http://www.multiprof.nl
* @version 0.4
* @date October 21, 2008
* @copyright (c) 2008 Jeroen Diderik(www.multiprof.nl)
* @license Creative Commons Attribution-Share Alike 3.0 Netherlands License - http://creativecommons.org/licenses/by-sa/3.0/nl/
* @example Visit http://www.multiprof.nl/ for more informations about this library
*/

//Global user variables to set (CHANGE TO WHAT YOU WANT IT TO BE)
var pwi_username = "co3sound";
var pwi_photosize = 512; //return maximum size picture (see for supported format:  http://code.google.com/apis/picasaweb/reference.html#Parameters)
var pwi_thumbsize = 64; //size thumb /cropped(see for supported format:  http://code.google.com/apis/picasaweb/reference.html#Parameters)
var pwi_albumcols = 3; // distribute thumbs on main page over x collums
var pwi_cols = 4; // distribute thumbs on albumphotos page over x collums
var pwi_maxresults = 24; //maximum of pictures on albumphotos page
var pwi_maxalbums = 48; //maximum of pictures on albumphotos page
var pwi_container_div = "#container";

// NEW IN VERSION 0.4 !!!
var pwi_album_only = ""; //setup without a specific alnum, choose an album and take the number from the url between "#" and the last "/1"


//obsolete, untill this will be implemented
var pwi_show_albumtitles = true;
var pwi_show_phototitles = true;


// ****  DONT CHANGE BELOW UNLESS YOU KNOW WHAT YOU ARE DOING ****
//preset globals
var pwi_currAlbum = "";
var pwi_currAlbumTitle = "";
var pwi_currPhoto = "";
var pwi_page = "";
var pwi_si = 1;
var pwi_storage_albums;
var pwi_storage_photos;
var pwi_storage_photo;
var pwi_history = "";

// various functions
//get querytring (for later use to make deeplinks)
function readGet() {
var _GET = new Array();
var uriStr = window.location.href.replace(/&/g, '&');
var paraArr,
paraSplit;
if (uriStr.indexOf('?') > -1) {
var uriArr = uriStr.split('?');
var paraStr = uriArr[1];
} else {
return _GET;
}
if (paraStr.indexOf('&') > -1) {
paraArr = paraStr.split('&');
} else {
paraArr = new Array(paraStr);
}
for (var i = 0; i < paraArr.length; i++) {
		    paraArr[i] = paraArr[i].indexOf('=') > -1 ? paraArr[i] : paraArr[i] + '=';
	paraSplit = paraArr[i].split('=');
	_GET[paraSplit[0]] = decodeURI(paraSplit[1].replace(/\+/g, ' '));
	}
	return _GET;
	};
	var _GET = readGet();
	
	//fast string concat function ( var.push(x), var.toString() )
	function StringCat() {
	var sp;
	var ep;
	var l = 0;
	this.push = function(what) {
	if (typeof(sp) == 'undefined') {
	ep = new Array();
	sp = ep;
	} else {
	var oep = ep;
	ep = new Array();
	oep[1] = ep;
	}
	ep[0] = what; ++l;
	};
	this.toString = function() {
	if (l == 0) return;
	while (l > 1) {
	var ptr = sp;
	var nsp = new Array();
	var nep = nsp;
	var nl = 0;
	while (typeof(ptr) != 'undefined') {
	if (typeof(nep[0]) == 'undefined') {
	nep[0] = ptr[0]; ++nl;
	} else {
	if (typeof(ptr[0]) != 'undefined') nep[0] += ptr[0];
	nep[1] = new Array();
	nep = nep[1];
	};
	ptr = ptr[1];
	};
	sp = nsp;
	ep = nep;
	l = nl;
	};
	return sp[0];
	};
	}
	
	function formatDate(dt) {
	var months = new Array(12);
	months[0] = "January";
	months[1] = "February";
	months[2] = "March";
	months[3] = "April";
	months[4] = "May";
	months[5] = "June";
	months[6] = "July";
	months[7] = "August";
	months[8] = "September";
	months[9] = "October";
	months[10] = "November";
	months[11] = "December";
	var today = new Date(Number(dt));
	var year = today.getYear();
	if (year < 1000) {
		   year += 1900;
		   };
		   return (months[(today.getMonth())] + " " + today.getDate() + ", " + year);
		   }
		   
		   function formatDateTime(dt) {
		   var today = new Date(Number(dt));
		   var year = today.getYear();
		   if (year < 1000) {
			      year += 1900
			      };
			      return (today.getDate() + "-" + (today.getMonth() + 1) + "-" + year + " " + today.getHours() + ":" + (today.getMinutes() < 10 ? "0" + today.getMinutes() : today.getMinutes()));
										}
										
										var photoids = new Array();
										
										function albums(j) { //returns the list of all albums for the user
										var scAlbums = new StringCat();
										scAlbums.push("<center><table><tr><td colspan='" + pwi_albumcols + "'><H3>Albums</H3></td></tr><tr>");
										for (var i = 0; i < j.feed.entry.length; i++) {
										var id_base = j.feed.entry[i].gphoto$id.$t;
										var album_date = formatDate(j.feed.entry[i].gphoto$timestamp.$t);
										scAlbums.push("<td valign=top align=center><a class='standard' href='javascript:void(0)' onclick='javascript:$.historyLoad(\"" + id_base + "/1\")'><img src='" + j.feed.entry[i].media$group.media$thumbnail[0].url + "?imgmax=" + pwi_thumbsize + "&crop=1' class='pwimages' /></a>");
										scAlbums.push("<br><a class='standard' href='javascript:void(0)' onclick='javascript:$.historyLoad(\"" + id_base + "/1\")'>" + j.feed.entry[i].title.$t + "</a><br/>" + album_date + "&nbsp;&nbsp;&nbsp;&nbsp;" + j.feed.entry[i].gphoto$numphotos.$t + " photos</center></td>");
									if (i % pwi_albumcols == (pwi_albumcols - 1)) {
									scAlbums.push("</tr><tr><td colspan='" + pwi_albumcols + "'><hr/></td></tr><tr>");
									}
									}
									scAlbums.push("</tr></table></center>");
						pwi_storage_albums = scAlbums.toString();
						
						if(pwi_album_only.length > 0){
						getAlbum(pwi_album_only,1);
						}else{
						show(false, pwi_storage_albums);
						}
						}
						
						function album(j) { //returns all photos in a specific album
						var scPhotos = new StringCat();
						//get the number of photos in the album
						var np = j.feed.openSearch$totalResults.$t;
						var loc = j.feed.gphoto$location.$t;
						var desc = j.feed.subtitle.$t;
						var album_date = formatDate(j.feed.gphoto$timestamp.$t);
						var item_plural = "s";
						if (np == "1") {
						item_plural = "";
						}
						var len = j.feed.entry.length;
						pwi_currAlbumTitle = j.feed.title.$t;
						
						scPhotos.push("<center><table border=0><tr><td colspan='" + pwi_cols + "'>");
										if(!pwi_album_only.length>0){
										scPhotos.push("<a class='standard' href='javascript:void(0)' onclick='$.historyLoad(\"\");'><<< Albums</a> &gt; " + j.feed.title.$t + "<br/>");
										};
										scPhotos.push("<blockquote><div style='margin-left:3px'><h4>" + j.feed.title.$t + "</h4></div>");
										scPhotos.push("<div style='margin-left:3px'><i>" + np + " photo" + item_plural + ", " + album_date + ", " + loc + "</i></div>");
										scPhotos.push("<div style='margin-left:3px'><b>" + desc + "</b></div>");
										scPhotos.push("<div style='margin-left:3px'><a href='http://picasaweb.google.com/" + pwi_username + "/" + j.feed.gphoto$name.$t + "/photo#s" + j.feed.entry[0].gphoto$id.$t + "' rel='gb_page_fs[]' target='_new'>View as slideshow</a></div></blockquote><br/>");
									scPhotos.push("</td></tr><tr>");
								
								//create paging navigation
								pageCount = (np / pwi_maxresults);
								var ppage = "previous | ",
								npage = "| next";
								if (pwi_page > 1) {
								ppage = "<a href='javascript:void(0)' onclick='$.historyLoad(\"" + pwi_currAlbum + "/" + (parseInt(pwi_page) - 1) + "\")'>previous</a> | "
								};
								if (pwi_page < pageCount) {
									       npage = "| <a href='javascript:void(0)' onclick='$.historyLoad(\"" + pwi_currAlbum + "/" + (parseInt(pwi_page) + 1) + "\")'>next</a>"
									       };
									       
									       var navRow = new StringCat();
									       navRow.push("<tr><td colspan='" + pwi_cols + "'>" + ppage + "Page ");
										for (var i = 1; i < pageCount + 1; i++) {
										if (i == pwi_page) {
										navRow.push("<b>[" + (i) + "]</b> ");
										} else {
										navRow.push("<a href='javascript:void(0)' onclick='$.historyLoad(\"" + pwi_currAlbum + "/" + i + "\")'>" + (i) + "</a> ");
										};
										};
										navRow.push(npage + "</td></tr>");
								scPhotos.push(navRow.toString());
								for (var i = 0; i < len; i++) {
										var img_base = j.feed.entry[i].content.src;
										var id_base = j.feed.entry[i].gphoto$id.$t;
										var desc = j.feed.entry[i].summary.$t;
										var photoDate = j.feed.entry[i].exif$tags.exif$time ? formatDateTime(j.feed.entry[i].exif$tags.exif$time.$t) : j.feed.entry[i].published.$t;
										desc = photoDate + " - " + desc;
										scPhotos.push("<td valign=top><center><a href='" + img_base + "?imgmax=" + pwi_photosize + "&crop=0' class='lightbox' title='" + desc + "'><img src='" + img_base + "?imgmax=" + pwi_thumbsize + "&crop=1' class='pwimages'/></a><br/>");
										scPhotos.push("<small>" + photoDate + "</small></center></td>");
								if (i % pwi_cols == (pwi_cols - 1)) {
								scPhotos.push("</tr><tr><td colspan=" + pwi_cols + "><hr size='1'/></td></tr><tr>");
								}
								}
								scPhotos.push("</tr>"+navRow+"</table></center>");
					pwi_storage_photos = scPhotos.toString();
					show(false, pwi_storage_photos);
					}
					
					function getAlbums() {
					if (pwi_storage_albums) {
					show(false, pwi_storage_albums);
					} else {
					show(true, '');
					var url = 'http://picasaweb.google.com/data/feed/api/user/' + pwi_username + '?category=album&max-results=' + pwi_maxalbums + '&access=public&alt=json';
					$.getJSON(url, 'callback=?', albums);
					}
					}
					
					function getAlbum(albumid, newPage) {
					if (albumid != pwi_currAlbum || pwi_page != newPage) {
					pwi_page = newPage;
					pwi_currAlbum = albumid;
					pwi_si = ((pwi_page - 1) * pwi_maxresults) + 1;
					var url = 'http://picasaweb.google.com/data/feed/api/user/' + pwi_username + '/albumid/' + albumid + '?category=photo&max-results=' + pwi_maxresults + '&start-index=' + pwi_si + '&alt=json';
					show(true, '');
					$.getJSON(url, 'callback=?', album);
					} else {
					show(false, pwi_storage_photos);
					}
					}
					
					function fromHistory(hash) {
					if (hash) {
					var a,p;
					if (hash.indexOf("/") > 0) {
					a = hash.split("/")[0];
					p = hash.split("/")[1];
					getAlbum(a, p);
					}
					} else {
					getAlbums();
					}
					}
					
					function show(loading, data) {
					if (loading) {
					$(pwi_container_div).fadeOut('slow');
					$("#maincontent").block("<img src=\"images/lightbox-ico-loading.gif\"> Loading ...", {
						border: '3px solid #a00'
						});
						} else {
						$("#maincontent").unblock();
						$(pwi_container_div).html(data).fadeIn('fast');
						$('a.lightbox').lightBox();
						}
						}
						
						$(document).ready(function() {
						if(pwi_username == "your_picasa_username"){
						alert('Open the pwi-0.2.js and change content \nof the variable pwi_username in the top of the file\nto your Picasa Webalbum name');
						}else{
						$.extend($.blockUI.defaults.overlayCSS, {
						backgroundColor: '#000'
						});
						$.ajaxSetup({
						cache: true
						});
						$.historyInit(fromHistory);
						}
						});
						
						
						//$Update: May 10, 2007$
						//$Update: July 31, 2007, Jeroen Diderik$
						//$Update: September 23, 2007, Jeroen Diderik, Mootools conversion$
						//$Update: November 19, 2007, Jeroen Diderik, PWI vars update$
						//$Update: March 25, 2008, Jeroen Diderik, rewrite to replace MOOTools with  jQuery$
						//$Update: April 05, 2008, Jeroen Diderik, rewrite for early release$
						//$update: October 21, 2008, Jeroen Diderik, added ALBUM_ONLY option
						
						
						/*
						TOD0: photo details
						function getPhoto(photoid){
						pwi_currPhoto = photoid;
						url = 'http://picasaweb.google.com/data/entry/api/user/'+pwi_username+'/albumid/'+pwi_currAlbum+'/photoid/'+photoid+'?alt=json';
						show(true,'');
						$.getJSON(url, 'callback=?',photo);
						}
						*/