In the as3 last.fm api provided over at google code, there is no classes provided for the radio API, which appears to be a fairly recent addition to the last.fm API. The radio API requires 2 key steps. First step is the radio.tune method, where you submit the station URL. For example lastfm://artist/radiohead/similarartists will tune you in to a station which returns Radioheads similar artists. I wrote my own radio class (in a similar style of the other classes provided) which looks a bit like this:
package { import KeyValue; import flash.events.Event; import flash.net.URLRequest; import flash.net.URLRequestMethod; import flash.net.navigateToURL; import flash.net.URLVariables; public class Radio extends LastFMBase { public static const TUNE:String = "tune"; public function tuneRadio(stationName:String):void { var variables:Array = new Array(); variables.push(new KeyValue("method", "radio.tune")); variables.push(new KeyValue("api_key", LastFMBase.API_KEY)); variables.push(new KeyValue("sk", LastFMBase.sk)); variables.push(new KeyValue("station", stationName)); var urlVariables:URLVariables = new URLVariables(); urlVariables['method'] = "radio.tune"; urlVariables['api_key'] = LastFMBase.API_KEY; urlVariables['sk'] = LastFMBase.sk; urlVariables['station'] = stationName; urlVariables['api_sig'] = createAPI_Signature(variables); requestURL("", URLRequestMethod.POST, urlVariables); loader.addEventListener(Event.COMPLETE, function (event:Event):void {dispatchEvent(new Event(Radio.TUNE))}); } } }
The second step is to fetch a playlist, using the radio.getPlaylist method. By modifying the playlist method in the Playlist.as to the following, you can parse in the playlist location, returned when the tuneRadio function is called:
public function fetch(playlistURL:String):void { var playListVars:Array = new Array(); playListVars.push(new KeyValue("method", "radio.getPlaylist")); playListVars.push(new KeyValue("api_key", LastFMBase.API_KEY)); playListVars.push(new KeyValue("sk", LastFMBase.sk)); var urlVariables:URLVariables = new URLVariables(); urlVariables['method'] = "radio.getPlaylist"; urlVariables['api_key'] = LastFMBase.API_KEY; urlVariables['sk'] = LastFMBase.sk; urlVariables['api_sig'] = createAPI_Signature(playListVars); trace("URL VARIABLES: " + urlVariables); requestURL("", URLRequestMethod.POST, urlVariables); loader.addEventListener(Event.COMPLETE, function (event:Event):void {dispatchEvent(new Event(Playlist.FETCH))}); }
So, in short to call these from your main class, it could look like the following:
package { import flash.events.Event; import flash.utils.Dictionary; public class lastfmClass extends LastFMBase { private var _auth:Auth = new Auth(); private var _radio:Radio = new Radio(); private var _playlist:Playlist = new Playlist(); public var _trackArray:Object = new Object(); private function tuneMyStation(artistName:String):void { _radio.tuneRadio("lastfm://artist/"+_artistName+"/similarartists"); _radio.addEventListener(Radio.TUNE, getRadioHandler); } public function getRadioHandler(event:Event):void { _radio.removeEventListener(Radio.TUNE, getRadioHandler); _playlist.fetch(_radio.xml.station.url); _playlist.addEventListener(Playlist.FETCH, fetchHandler); } private function fetchHandler(event:Event):void { //process results } } }
Tags: api, as3, last.fm, prid303-dev, radio api, radio.tune