/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function md5(s){ return hex_md5(s); }
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}

/*
 *
 * Copyright (c) 2008-2009, Felix Bruns <felixbruns@web.de>
 *
 */

/* Set an object on a Storage object. */
Storage.prototype.setObject = function(key, value){
	this.setItem(key, JSON.stringify(value));
}

/* Get an object from a Storage object. */
Storage.prototype.getObject = function(key){
	var item = this.getItem(key);

	return JSON.parse(item);
}

/* Creates a new cache object. */
function LastFMCache(){
	/* Expiration times. */
	var MINUTE =          60;
	var HOUR   = MINUTE * 60;
	var DAY    = HOUR   * 24;
	var WEEK   = DAY    *  7;
	var MONTH  = WEEK   *  4.34812141;
	var YEAR   = MONTH  * 12;

	/* Methods with weekly expiration. */
	var weeklyMethods = [
		'artist.getSimilar',
		'tag.getSimilar',
		'track.getSimilar',
		'artist.getTopAlbums',
		'artist.getTopTracks',
		'geo.getTopArtists',
		'geo.getTopTracks',
		'tag.getTopAlbums',
		'tag.getTopArtists',
		'tag.getTopTags',
		'tag.getTopTracks',
		'user.getTopAlbums',
		'user.getTopArtists',
		'user.getTopTags',
		'user.getTopTracks'
	];

	/* Name for this cache. */
	var name = 'lastfm';

	/* Create cache if it doesn't exist yet. */
	if(localStorage.getObject(name) == null){
		localStorage.setObject(name, []);
	}

	/* Get expiration time for given parameters. */
	this.getExpirationTime = function(params){
		var method = params.method;

		if((/Weekly/).test(method) && !(/List/).test(method)){
			if(typeof(params.to) != 'undefined' && typeof(params.from) != 'undefined'){
				return YEAR;
			}
			else{
				return WEEK;
			}
		}

		for(var key in this.weeklyMethods){
			if(method == this.weeklyMethods[key]){
				return WEEK;
			}
		}

		return -1;
	};

	/* Check if this cache contains specific data. */
	this.contains = function(hash){
		return typeof(localStorage.getObject(name)[hash]) != 'undefined' &&
			typeof(localStorage.getObject(name)[hash].data) != 'undefined';
	};

	/* Load data from this cache. */
	this.load = function(hash){
		return localStorage.getObject(name)[hash].data;
	};

	/* Remove data from this cache. */
	this.remove = function(hash){
		var object = localStorage.getObject(name);

		object[hash] = undefined;

		localStorage.setObject(name, object);
	};

	/* Store data in this cache with a given expiration time. */
	this.store = function(hash, data, expiration){
		var object = localStorage.getObject(name);
		var time   = Math.round(new Date().getTime() / 1000);

		object[hash] = {
			data       : data,
			expiration : time + expiration
		};

		localStorage.setObject(name, object);
	};

	/* Check if some specific data expired. */
	this.isExpired = function(hash){
		var object = localStorage.getObject(name);
		var time   = Math.round(new Date().getTime() / 1000);

		if(time > object[hash].expiration){
			return true;
		}

		return false;
	};

	/* Clear this cache. */
	this.clear = function(){
		localStorage.setObject(name, []);
	};
};
/*
 *
 * Copyright (c) 2008-2010, Felix Bruns <felixbruns@web.de>
 *
 */

function LastFM(options){
	/* Set default values for required options. */
	var apiKey    = options.apiKey    || '';
	var apiSecret = options.apiSecret || '';
	var apiUrl    = options.apiUrl    || 'https://ws.audioscrobbler.com/2.0/';
	var cache     = options.cache     || undefined;

	/* Set API key. */
	this.setApiKey = function(_apiKey){
		apiKey = _apiKey;
	};

	/* Set API key. */
	this.setApiSecret = function(_apiSecret){
		apiSecret = _apiSecret;
	};

	/* Set API URL. */
	this.setApiUrl = function(_apiUrl){
		apiUrl = _apiUrl;
	};

	/* Set cache. */
	this.setCache = function(_cache){
		cache = _cache;
	};

	/* Set the JSONP callback identifier counter. This is used to ensure the callbacks are unique */
	var jsonpCounter = 0;

	/* Internal call (POST, GET). */
	var internalCall = function(params, callbacks, requestMethod){
		/* Cross-domain POST request (doesn't return any data, always successful). */
		if(requestMethod == 'POST'){
			/* Create iframe element to post data. */
			var html   = document.getElementsByTagName('html')[0];
			var iframe = document.createElement('iframe');
			var doc;

			/* Set iframe attributes. */
			iframe.width        = 1;
			iframe.height       = 1;
			iframe.style.border = 'none';
			iframe.onload       = function(){
				/* Remove iframe element. */
				//html.removeChild(iframe);

				/* Call user callback. */
				if(typeof(callbacks.success) != 'undefined'){
					callbacks.success();
				}
			};

			/* Append iframe. */
			html.appendChild(iframe);

			/* Get iframe document. */
			if(typeof(iframe.contentWindow) != 'undefined'){
				doc = iframe.contentWindow.document;
			}
			else if(typeof(iframe.contentDocument.document) != 'undefined'){
				doc = iframe.contentDocument.document.document;
			}
			else{
				doc = iframe.contentDocument.document;
			}

			/* Open iframe document and write a form. */
			doc.open();
			doc.clear();
			doc.write('<form method="post" action="' + apiUrl + '" id="form">');

			/* Write POST parameters as input fields. */
			for(var param in params){
				doc.write('<input type="text" name="' + param + '" value="' + params[param] + '">');
			}

			/* Write automatic form submission code. */
			doc.write('</form>');
			doc.write('<script type="application/x-javascript">');
			doc.write('document.getElementById("form").submit();');
			doc.write('</script>');

			/* Close iframe document. */
			doc.close();
		}
		/* Cross-domain GET request (JSONP). */
		else{
			/* Get JSONP callback name. */
			var jsonp = 'jsonp' + new Date().getTime() + jsonpCounter;

			/* Update the unique JSONP callback counter */
			jsonpCounter += 1;

			/* Calculate cache hash. */
			var hash = auth.getApiSignature(params);

			/* Check cache. */
			if(typeof(cache) != 'undefined' && cache.contains(hash) && !cache.isExpired(hash)){
				if(typeof(callbacks.success) != 'undefined'){
					callbacks.success(cache.load(hash));
				}

				return;
			}

			/* Set callback name and response format. */
			params.callback = jsonp;
			params.format   = 'json';

			/* Create JSONP callback function. */
			window[jsonp] = function(data){
				/* Is a cache available?. */
				if(typeof(cache) != 'undefined'){
					var expiration = cache.getExpirationTime(params);

					if(expiration > 0){
						cache.store(hash, data, expiration);
					}
				}

				/* Call user callback. */
				if(typeof(data.error) != 'undefined'){
					if(typeof(callbacks.error) != 'undefined'){
						callbacks.error(data.error, data.message);
					}
				}
				else if(typeof(callbacks.success) != 'undefined'){
					callbacks.success(data);
				}

				/* Garbage collect. */
				window[jsonp] = undefined;

				try{
					delete window[jsonp];
				}
				catch(e){
					/* Nothing. */
				}

				/* Remove script element. */
				if(head){
					head.removeChild(script);
				}
			};

			/* Create script element to load JSON data. */
			var head   = document.getElementsByTagName("head")[0];
			var script = document.createElement("script");

			/* Build parameter string. */
			var array = [];

			for(var param in params){
				array.push(encodeURIComponent(param) + "=" + encodeURIComponent(params[param]));
			}

			/* Set script source. */
			script.src = apiUrl + '?' + array.join('&').replace(/%20/g, '+');

			/* Append script element. */
			head.appendChild(script);
		}
	};

	/* Normal method call. */
	var call = function(method, params, callbacks, requestMethod){
		/* Set default values. */
		params        = params        || {};
		callbacks     = callbacks     || {};
		requestMethod = requestMethod || 'GET';

		/* Add parameters. */
		params.method  = method;
		params.api_key = apiKey;

		/* Call method. */
		internalCall(params, callbacks, requestMethod);
	};

	/* Signed method call. */
	var signedCall = function(method, params, session, callbacks, requestMethod){
		/* Set default values. */
		params        = params        || {};
		callbacks     = callbacks     || {};
		requestMethod = requestMethod || 'GET';

		/* Add parameters. */
		params.method  = method;
		params.api_key = apiKey;

		/* Add session key. */
		if(session && typeof(session.key) != 'undefined'){
			params.sk = session.key;
		}

		/* Get API signature. */
		params.api_sig = auth.getApiSignature(params);

		/* Call method. */
		internalCall(params, callbacks, requestMethod);
	};

	/* Album methods. */
	this.album = {
		addTags : function(params, session, callbacks){
			/* Build comma separated tags string. */
			if(typeof(params.tags) == 'object'){
				params.tags = params.tags.join(',');
			}

			signedCall('album.addTags', params, session, callbacks, 'POST');
		},

		getBuylinks : function(params, callbacks){
			call('album.getBuylinks', params, callbacks);
		},

		getInfo : function(params, callbacks){
			call('album.getInfo', params, callbacks);
		},

		getTags : function(params, session, callbacks){
			signedCall('album.getTags', params, session, callbacks);
		},

		removeTag : function(params, session, callbacks){
			signedCall('album.removeTag', params, session, callbacks, 'POST');
		},

		search : function(params, callbacks){
			call('album.search', params, callbacks);
		},

		share : function(params, session, callbacks){
			/* Build comma separated recipients string. */
			if(typeof(params.recipient) == 'object'){
				params.recipient = params.recipient.join(',');
			}

			signedCall('album.share', params, callbacks);
		}
	};

	/* Artist methods. */
	this.artist = {
		addTags : function(params, session, callbacks){
			/* Build comma separated tags string. */
			if(typeof(params.tags) == 'object'){
				params.tags = params.tags.join(',');
			}

			signedCall('artist.addTags', params, session, callbacks, 'POST');
		},

		getCorrection : function(params, callbacks){
			call('artist.getCorrection', params, callbacks);
		},

		getEvents : function(params, callbacks){
			call('artist.getEvents', params, callbacks);
		},

		getImages : function(params, callbacks){
			call('artist.getImages', params, callbacks);
		},

		getInfo : function(params, callbacks){
			call('artist.getInfo', params, callbacks);
		},

		getPastEvents : function(params, callbacks){
			call('artist.getPastEvents', params, callbacks);
		},

		getPodcast : function(params, callbacks){
			call('artist.getPodcast', params, callbacks);
		},

		getShouts : function(params, callbacks){
			call('artist.getShouts', params, callbacks);
		},

		getSimilar : function(params, callbacks){
			call('artist.getSimilar', params, callbacks);
		},

		getTags : function(params, session, callbacks){
			signedCall('artist.getTags', params, session, callbacks);
		},

		getTopAlbums : function(params, callbacks){
			call('artist.getTopAlbums', params, callbacks);
		},

		getTopFans : function(params, callbacks){
			call('artist.getTopFans', params, callbacks);
		},

		getTopTags : function(params, callbacks){
			call('artist.getTopTags', params, callbacks);
		},

		getTopTracks : function(params, callbacks){
			call('artist.getTopTracks', params, callbacks);
		},

		removeTag : function(params, session, callbacks){
			signedCall('artist.removeTag', params, session, callbacks, 'POST');
		},

		search : function(params, callbacks){
			call('artist.search', params, callbacks);
		},

		share : function(params, session, callbacks){
			/* Build comma separated recipients string. */
			if(typeof(params.recipient) == 'object'){
				params.recipient = params.recipient.join(',');
			}

			signedCall('artist.share', params, session, callbacks, 'POST');
		},

		shout : function(params, session, callbacks){
			signedCall('artist.shout', params, session, callbacks, 'POST');
		}
	};

	/* Auth methods. */
	this.auth = {
		getMobileSession : function(params, callbacks){
			/* Set new params object with authToken. */
			params = {
				username  : params.username,
				authToken : md5(params.username + md5(params.password))
			};

			signedCall('auth.getMobileSession', params, null, callbacks);
		},

		getSession : function(params, callbacks){
			signedCall('auth.getSession', params, null, callbacks);
		},

		getToken : function(callbacks){
			signedCall('auth.getToken', null, null, callbacks);
		},

		/* Deprecated. Security hole was fixed. */
		getWebSession : function(callbacks){
			/* Save API URL and set new one (needs to be done due to a cookie!). */
			var previuousApiUrl = apiUrl;

			apiUrl = 'http://ext.last.fm/2.0/';

			signedCall('auth.getWebSession', null, null, callbacks);

			/* Restore API URL. */
			apiUrl = previuousApiUrl;
		}
	};

	/* Chart methods. */
	this.chart = {
		getHypedArtists : function(params, session, callbacks){
			call('chart.getHypedArtists', params, callbacks);
		},

		getHypedTracks : function(params, session, callbacks){
			call('chart.getHypedTracks', params, callbacks);
		},

		getLovedTracks : function(params, session, callbacks){
			call('chart.getLovedTracks', params, callbacks);
		},

		getTopArtists : function(params, session, callbacks){
			call('chart.getTopArtists', params, callbacks);
		},

		getTopTags : function(params, session, callbacks){
			call('chart.getTopTags', params, callbacks);
		},

		getTopTracks : function(params, session, callbacks){
			call('chart.getTopTracks', params, callbacks);
		}
	};

	/* Event methods. */
	this.event = {
		attend : function(params, session, callbacks){
			signedCall('event.attend', params, session, callbacks, 'POST');
		},

		getAttendees : function(params, session, callbacks){
			call('event.getAttendees', params, callbacks);
		},

		getInfo : function(params, callbacks){
			call('event.getInfo', params, callbacks);
		},

		getShouts : function(params, callbacks){
			call('event.getShouts', params, callbacks);
		},

		share : function(params, session, callbacks){
			/* Build comma separated recipients string. */
			if(typeof(params.recipient) == 'object'){
				params.recipient = params.recipient.join(',');
			}

			signedCall('event.share', params, session, callbacks, 'POST');
		},

		shout : function(params, session, callbacks){
			signedCall('event.shout', params, session, callbacks, 'POST');
		}
	};

	/* Geo methods. */
	this.geo = {
		getEvents : function(params, callbacks){
			call('geo.getEvents', params, callbacks);
		},

		getMetroArtistChart : function(params, callbacks){
			call('geo.getMetroArtistChart', params, callbacks);
		},

		getMetroHypeArtistChart : function(params, callbacks){
			call('geo.getMetroHypeArtistChart', params, callbacks);
		},

		getMetroHypeTrackChart : function(params, callbacks){
			call('geo.getMetroHypeTrackChart', params, callbacks);
		},

		getMetroTrackChart : function(params, callbacks){
			call('geo.getMetroTrackChart', params, callbacks);
		},

		getMetroUniqueArtistChart : function(params, callbacks){
			call('geo.getMetroUniqueArtistChart', params, callbacks);
		},

		getMetroUniqueTrackChart : function(params, callbacks){
			call('geo.getMetroUniqueTrackChart', params, callbacks);
		},

		getMetroWeeklyChartlist : function(params, callbacks){
			call('geo.getMetroWeeklyChartlist', params, callbacks);
		},

		getMetros : function(params, callbacks){
			call('geo.getMetros', params, callbacks);
		},

		getTopArtists : function(params, callbacks){
			call('geo.getTopArtists', params, callbacks);
		},

		getTopTracks : function(params, callbacks){
			call('geo.getTopTracks', params, callbacks);
		}
	};

	/* Group methods. */
	this.group = {
		getHype : function(params, callbacks){
			call('group.getHype', params, callbacks);
		},

		getMembers : function(params, callbacks){
			call('group.getMembers', params, callbacks);
		},

		getWeeklyAlbumChart : function(params, callbacks){
			call('group.getWeeklyAlbumChart', params, callbacks);
		},

		getWeeklyArtistChart : function(params, callbacks){
			call('group.getWeeklyArtistChart', params, callbacks);
		},

		getWeeklyChartList : function(params, callbacks){
			call('group.getWeeklyChartList', params, callbacks);
		},

		getWeeklyTrackChart : function(params, callbacks){
			call('group.getWeeklyTrackChart', params, callbacks);
		}
	};

	/* Library methods. */
	this.library = {
		addAlbum : function(params, session, callbacks){
			signedCall('library.addAlbum', params, session, callbacks, 'POST');
		},

		addArtist : function(params, session, callbacks){
			signedCall('library.addArtist', params, session, callbacks, 'POST');
		},

		addTrack : function(params, session, callbacks){
			signedCall('library.addTrack', params, session, callbacks, 'POST');
		},

		getAlbums : function(params, callbacks){
			call('library.getAlbums', params, callbacks);
		},

		getArtists : function(params, callbacks){
			call('library.getArtists', params, callbacks);
		},

		getTracks : function(params, callbacks){
			call('library.getTracks', params, callbacks);
		}
	};

	/* Playlist methods. */
	this.playlist = {
		addTrack : function(params, session, callbacks){
			signedCall('playlist.addTrack', params, session, callbacks, 'POST');
		},

		create : function(params, session, callbacks){
			signedCall('playlist.create', params, session, callbacks, 'POST');
		},

		fetch : function(params, callbacks){
			call('playlist.fetch', params, callbacks);
		}
	};

	/* Radio methods. */
	this.radio = {
		getPlaylist : function(params, session, callbacks){
			signedCall('radio.getPlaylist', params, session, callbacks);
		},

		search : function(params, session, callbacks){
			signedCall('radio.search', params, session, callbacks);
		},

		tune : function(params, session, callbacks){
			signedCall('radio.tune', params, session, callbacks);
		}
	};

	/* Tag methods. */
	this.tag = {
		getInfo : function(params, callbacks){
			call('tag.getInfo', params, callbacks);
		},

		getSimilar : function(params, callbacks){
			call('tag.getSimilar', params, callbacks);
		},

		getTopAlbums : function(params, callbacks){
			call('tag.getTopAlbums', params, callbacks);
		},

		getTopArtists : function(params, callbacks){
			call('tag.getTopArtists', params, callbacks);
		},

		getTopTags : function(callbacks){
			call('tag.getTopTags', null, callbacks);
		},

		getTopTracks : function(params, callbacks){
			call('tag.getTopTracks', params, callbacks);
		},

		getWeeklyArtistChart : function(params, callbacks){
			call('tag.getWeeklyArtistChart', params, callbacks);
		},

		getWeeklyChartList : function(params, callbacks){
			call('tag.getWeeklyChartList', params, callbacks);
		},

		search : function(params, callbacks){
			call('tag.search', params, callbacks);
		}
	};

	/* Tasteometer method. */
	this.tasteometer = {
		compare : function(params, callbacks){
			call('tasteometer.compare', params, callbacks);
		},

		compareGroup : function(params, callbacks){
			call('tasteometer.compareGroup', params, callbacks);
		}
	};

	/* Track methods. */
	this.track = {
		addTags : function(params, session, callbacks){
			signedCall('track.addTags', params, session, callbacks, 'POST');
		},

		ban : function(params, session, callbacks){
			signedCall('track.ban', params, session, callbacks, 'POST');
		},

		getBuylinks : function(params, callbacks){
			call('track.getBuylinks', params, callbacks);
		},

		getCorrection : function(params, callbacks){
			call('track.getCorrection', params, callbacks);
		},

		getFingerprintMetadata : function(params, callbacks){
			call('track.getFingerprintMetadata', params, callbacks);
		},

		getInfo : function(params, callbacks){
			call('track.getInfo', params, callbacks);
		},

		getShouts : function(params, callbacks){
			call('track.getShouts', params, callbacks);
		},

		getSimilar : function(params, callbacks){
			call('track.getSimilar', params, callbacks);
		},

		getTags : function(params, session, callbacks){
			signedCall('track.getTags', params, session, callbacks);
		},

		getTopFans : function(params, callbacks){
			call('track.getTopFans', params, callbacks);
		},

		getTopTags : function(params, callbacks){
			call('track.getTopTags', params, callbacks);
		},

		love : function(params, session, callbacks){
			signedCall('track.love', params, session, callbacks, 'POST');
		},

		removeTag : function(params, session, callbacks){
			signedCall('track.removeTag', params, session, callbacks, 'POST');
		},

		scrobble : function(params, session, callbacks){
			/* Flatten an array of multiple tracks into an object with "array notation". */
			if(params.constructor.toString().indexOf("Array") != -1){
				var p = {};

				for(i in params){
					for(j in params[i]){
						p[j + '[' + i + ']'] = params[i][j];
					}
				}

				params = p;
			}

			signedCall('track.scrobble', params, session, callbacks, 'POST');
		},

		search : function(params, callbacks){
			call('track.search', params, callbacks);
		},

		share : function(params, session, callbacks){
			/* Build comma separated recipients string. */
			if(typeof(params.recipient) == 'object'){
				params.recipient = params.recipient.join(',');
			}

			signedCall('track.share', params, session, callbacks, 'POST');
		},

		unban : function(params, session, callbacks){
			signedCall('track.unban', params, session, callbacks, 'POST');
		},

		unlove : function(params, session, callbacks){
			signedCall('track.unlove', params, session, callbacks, 'POST');
		},

		updateNowPlaying : function(params, session, callbacks){
			signedCall('track.updateNowPlaying', params, session, callbacks, 'POST');
		}
	};

	/* User methods. */
	this.user = {
		getArtistTracks : function(params, callbacks){
			call('user.getArtistTracks', params, callbacks);
		},

		getBannedTracks : function(params, callbacks){
			call('user.getBannedTracks', params, callbacks);
		},

		getEvents : function(params, callbacks){
			call('user.getEvents', params, callbacks);
		},

		getFriends : function(params, callbacks){
			call('user.getFriends', params, callbacks);
		},

		getInfo : function(params, callbacks){
			call('user.getInfo', params, callbacks);
		},

		getLovedTracks : function(params, callbacks){
			call('user.getLovedTracks', params, callbacks);
		},

		getNeighbours : function(params, callbacks){
			call('user.getNeighbours', params, callbacks);
		},

		getNewReleases : function(params, callbacks){
			call('user.getNewReleases', params, callbacks);
		},

		getPastEvents : function(params, callbacks){
			call('user.getPastEvents', params, callbacks);
		},

		getPersonalTracks : function(params, callbacks){
			call('user.getPersonalTracks', params, callbacks);
		},

		getPlaylists : function(params, callbacks){
			call('user.getPlaylists', params, callbacks);
		},

		getRecentStations : function(params, session, callbacks){
			signedCall('user.getRecentStations', params, session, callbacks);
		},

		getRecentTracks : function(params, callbacks){
			call('user.getRecentTracks', params, callbacks);
		},

		getRecommendedArtists : function(params, session, callbacks){
			signedCall('user.getRecommendedArtists', params, session, callbacks);
		},

		getRecommendedEvents : function(params, session, callbacks){
			signedCall('user.getRecommendedEvents', params, session, callbacks);
		},

		getShouts : function(params, callbacks){
			call('user.getShouts', params, callbacks);
		},

		getTopAlbums : function(params, callbacks){
			call('user.getTopAlbums', params, callbacks);
		},

		getTopArtists : function(params, callbacks){
			call('user.getTopArtists', params, callbacks);
		},

		getTopTags : function(params, callbacks){
			call('user.getTopTags', params, callbacks);
		},

		getTopTracks : function(params, callbacks){
			call('user.getTopTracks', params, callbacks);
		},

		getWeeklyAlbumChart : function(params, callbacks){
			call('user.getWeeklyAlbumChart', params, callbacks);
		},

		getWeeklyArtistChart : function(params, callbacks){
			call('user.getWeeklyArtistChart', params, callbacks);
		},

		getWeeklyChartList : function(params, callbacks){
			call('user.getWeeklyChartList', params, callbacks);
		},

		getWeeklyTrackChart : function(params, callbacks){
			call('user.getWeeklyTrackChart', params, callbacks);
		},

		shout : function(params, session, callbacks){
			signedCall('user.shout', params, session, callbacks, 'POST');
		}
	};

	/* Venue methods. */
	this.venue = {
		getEvents : function(params, callbacks){
			call('venue.getEvents', params, callbacks);
		},

		getPastEvents : function(params, callbacks){
			call('venue.getPastEvents', params, callbacks);
		},

		search : function(params, callbacks){
			call('venue.search', params, callbacks);
		}
	};

	/* Private auth methods. */
	var auth = {
		getApiSignature : function(params){
			var keys   = [];
			var string = '';

			for(var key in params){
				keys.push(key);
			}

			keys.sort();

			for(var index in keys){
				var key = keys[index];

				string += key + params[key];
			}

			string += apiSecret;

			/* Needs lastfm.api.md5.js. */
			return md5(string);
		}
	};
}