<?PHP
if(!isset($ret))
{
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
}
$linkedBooks = 0;

$UserID = $_GET['user'];

if(isset($_GET['loc'])){
	$loc = $_GET['loc'];
}
else{
	$loc = 0;	//default location is 1
} 

if(isset($_GET['listname'])){
	$listName = $_GET['listname'];
}
else{
	$listName = "MyMap";	//default map
} 

include "db.php";
//need to have an if statement to catch the first time it is run and call - CALL b_setMapAuthorXYcoord

//Can swicth to this call if the map is having problems
//Need to CALL b_setMap_RelatedISBNs to create the initial relationships and then 
//b_setMap_AllRelatedISBNs b_setMap_relatedISBNs b_setMap_updateRelatedDuplicate
//Need to CALL b_setMap_updateRelatedDuplicate to update the relationships
//$query = "CALL b_getMap_relatedBooksNPath('$UserID', $loc)"; // this generates fixed points - 


//Need to call this b_setupUserMap if there are no books for that UserID
//	$query = "CALL b_getMap_relatedBooksNPath($UserID, $loc,\"$listName\")"; 
	$query = "CALL b_getMap_topRelatedBNP($UserID, $loc,\"$listName\")"; 
	
$results = mysqli_query($link, $query) or exit( mysqli_error( $link ));

if( mysqli_num_rows($results) == 0)
{
	//populate the data
	mysqli_close($link);
	include "db.php";
	$query1 = "CALL b_setupUserMap($UserID, $loc,\"$listName\")"; 
	$results1 = mysqli_query($link, $query1) or exit( mysqli_error( $link ));
	
	mysqli_close($link);
	include "db.php";
//	$query = "CALL b_getMap_relatedBooksNPath($UserID, $loc,\"$listName\")"; 
	$query = "CALL b_getMap_topRelatedBNP($UserID, $loc,\"$listName\")"; 

	$results = mysqli_query($link, $query) or exit( mysqli_error( $link ));
}

$output = "<?xml version=\"1.0\"?>";
$output .= "<results>";
$LastISBN = "START";
$ChangePaths = 0;

while($line = mysqli_fetch_assoc($results)) {

	$ISBN =trim($line["ISBN"]);
	$Title =trim($line["Title"]);
	$Author =trim($line["Author"]);
	$ImageURL =trim($line["ImageURL"]);
	$ISBN2 =trim($line["ISBN2"]); 
	
	IF ($LastISBN != $ISBN && $ChangePaths == 1) {
		$output .=  "</PATHS>";
		$output .=  "</Node>";
		$ChangePaths = 0;
	}
	
	IF ($LastISBN != $ISBN ) {
		$ChangePaths = 1;
		$output .=  "<Node>";
		$output .=  "<ISBN>" . $ISBN . "</ISBN>";
		$output .=  "<Title>" . $Title . "</Title>";
		$output .=  "<Author>" . $Author . "</Author>";
		$output .=  "<ImageURL>" . $ImageURL. "</ImageURL>";
		$output .=  "<PATHS>";
	}
	
	$output .= "<ISBN2>" . $ISBN2 . "</ISBN2>";
	
	$LastISBN = $ISBN;
}
		$output .=  "</PATHS>";
		$output .=  "</Node>";

$output .=  "</results>";

echo $output;

mysqli_close($link);

?>