<?php

class phpNapster {

	var $base_url = 'http://www.napster.com/searchXML/';
	var $command_artists_search = 'artist/';
	var $command_albums_search = 'album/';
	var $command_tracks_search = 'track/';
	
	
	
	    
    function request($command,$query) 
    {     	    	    
	    $url  = $this->base_url.$command."".$query;
	   	//echo $url."<br>";
		$c = curl_init($url);
		curl_setopt($c,CURLOPT_RETURNTRANSFER,true);
		$response = curl_exec($c);
		curl_close($c);
			
		$xml = simplexml_load_string($response); 		
		
		//print_r($response);
		return $xml;
    }
    
	function request_artist_search($command,$query){
		
		$xml = $this->request($command,$query);
		$artists = $xml->xpath('/resultlist/result');
		
		$i=0;
		
		if(count($artists) > 0){
			foreach($artists as $artist){
				
				$artistID = $artist['artist_id'];			
				$artistName = $artist['artist_name'];
				$genreID = $artist['genre_id'];							
				
				$results[$i] = array("artistID"=>$artistid,"artistName"=>$artistName,"genreID"=>$genreID);
								
				
				$i++;
			}	
			return $results;
			
		}else{
			return null;	
		}
		
			
	}
    
    function request_album_search($command,$query)     {   
		$xml = $this->request($command,$query);
		$albums = $xml->xpath('/resultlist/result');
		
		$i=0;
		foreach($albums as $album){			
						
			$albumID = $album['album_id'];			
			$albumName = $album['album'];
			$genreID = $album['genre_id'];
						
			$results[$i] = array("albumID"=>$albumID,"albumName"=>$albumName,"genreID"=>$genreID);;
			
			
			$i++;
		}		
		return $results;		 
    } 
    
    function request_track_search($command,$query)     {   
		$xml = $this->request($command,$query);
		$tracks = $xml->xpath('/resultlist/result');
		
		$i=0;
		foreach($tracks as $track){
									
			$trackID = $track['track_id'];			
			$trackName = $track['track'];
			$artistID = $track['artist_id'];	
			$albumID = $track['album_id'];
			$genreID = $track['genre_id'];
			
			$results[$i] = array("trackID"=>$trackID,"trackName"=>$trackName,"artistID"=>$artistID,"albumID"=>$albumID,"genreID"=>$genreID);
			
			
			$i++;
		}		
		return $results;		 
    } 
    
    function search_artist($query){
		//http://www.napster.com/searchXML/artist/slayer		       
		
		$response =  $this->request_artist_search("artist/",urlencode($query));
		return $response;	    
	}
	
	function get_artist_by_artistID($artistID){
		//http://www.napster.com/searchXML/artist/10429542/albums		       
		
		
		$response =  $this->request_artist_search("artist/",$artistID);
		return $response;	    
	}
	
	
	function get_albums_by_artistID($artistID){
		//http://www.napster.com/searchXML/artist/10429542/albums		       
		 
		$query = $artistID."/albums";
		$response =  $this->request_album_search("artist/",$query);
		return $response;	    
	}
	
	function get_album_by_albumID($albumID){
		//http://www.napster.com/searchXML/artist/10429542/albums		       
		
		
		$response =  $this->request_album_search("album/",$albumID);
		return $response;	    
	}
	
	function get_tracks_by_albumID($albumID){
		//http://www.napster.com/searchXML/artist/10429542/albums		       
		
		$query = $albumID."/tracks";
		$response =  $this->request_track_search("album/",$query);
		return $response;	    
	}
    
    
	function search_albums($query){
		//http://www.napster.com/searchXML/album/god%20hates%20us%20all		       
		
		$response =  $this->request_album_search("album/",urlencode($query));
		return $response;	    
	}
	
	function search_tracks($query){
		//http://www.napster.com/searchXML/track/god%20hates%20us%20all		       
		
		$response =  $this->request_track_search("track/",urlencode($query));
		return $response;	    
	}

}

?>