<?php
// Send header for XMLHTTP request
header("Cache-Control: no-cache, must-revalidate, private, pre-check=0, post-check=0, max-age=0");
header("Expires: " . gmdate('D, d M Y H:i:s', time()) . " GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");      
header("Pragma: no-cache"); 

header('Content-Type: text/plain');


require_once("../group.php");
session_start();

// Check if PHP session still exists
if (!isset($_SESSION['session_alive'])) {
    echo "{method:'updateMap', sessionerror:'true'}";
   
} else {

    require_once("../globals.php");
    require_once("../common.php");
    require_once("../map.php");
    
    if (isset($_GET['mapW'])) {
        $_SESSION['mapwidth']  = $_GET['mapW'];
        $_SESSION['mapheight'] = $_GET['mapH'];
    }
    
    // GET SESSION VARS 
    $old_geo_scale = $_SESSION['geo_scale'];
    $scaleLayers   = $_SESSION["scaleLayers"];
    $tocStyle      = $_SESSION["tocStyle"];
    $grouplist     = $_SESSION['grouplist'];
    $url_points    = $_SESSION['url_points'];
    
    
    // CREATE NEW MAP
    $pmap = &new PMAP($map);
    
    $mapURL      = $pmap->pmap_returnMapImgURL();
    $scalebarURL = $pmap->pmap_returnScalebarImgURL();
    $mapJS       = $pmap->pmap_returnMapJSParams();
    $refBoxStr   = $pmap->pmap_returnRefBoxStr();
    $mapwidth    = $pmap->pmap_returnMapW();
    $mapheight   = $pmap->pmap_returnMapH();
    $geo_scale   = $pmap->pmap_returnGeoScale();
    
    
    // Check if layers in TOC should be refreshed
    if ($scaleLayers) {
        foreach ($grouplist as $grp) {
            $layerList = $grp->getLayers();
            foreach ($layerList as $glayer) {
                $layName = $glayer->getLayerName();
                $qLayer = $map->getLayerByName($layName);
                if (checkScale($map, $qLayer, $geo_scale)) {
                    $visGroupsAfter[] = $layName;
                }
                if (checkScale($map, $qLayer, $old_geo_scale)) {
                    $visGroupsBefore[] = $layName;
                }
            }
        }
        
        if ($visGroupsAfter == $visGroupsBefore) {
            $refreshToc = 0;
        } else {
            $refreshToc = 1;
        }
        
        if (isset($_SESSION['zoom_extparams'])) {
            unset($_SESSION['zoom_extparams']);
            //error_log("pippo");
            $refreshToc = 1;
        } 
    } else {
        $refreshToc = 0;
    }
    
    
    // JS objects from map creation
    $strJS .= "mapW:'" . $mapJS['mapW'] . "', ";
    $strJS .= "mapH:'" . $mapJS['mapH'] . "', ";
    $strJS .= "refW:'" . $mapJS['refW'] . "', ";
    $strJS .= "refH:'" . $mapJS['refH'] . "', ";
    $strJS .= "minx_geo:'" . $mapJS['minx_geo'] . "', ";
    $strJS .= "maxy_geo:'" . $mapJS['maxy_geo'] . "', ";
    $strJS .= "xdelta_geo:'" . $mapJS['xdelta_geo'] . "', ";
    $strJS .= "ydelta_geo:'" . $mapJS['ydelta_geo'] . "' ";
    
    
    // Serialize url_points
    if (is_array($url_points)) {
        foreach ($url_points as $up) {
            $urlPntStr .= $up[0] . "@@" . $up[1] . "@@" . urlencode($up[2]) . '@@@'; 
        }
        $urlPntStr = addslashes(substr($urlPntStr, 0, -3));
        //error_log($urlPntStr);
    }
    
    // return JS object literals "{}" for XMLHTTP request 
    echo "{method:'updateMap', sessionerror:'false',  mapURL:'$mapURL', scalebarURL:'$scalebarURL', geo_scale:'$geo_scale', refBoxStr:'$refBoxStr', tocStyle:'$tocStyle', refreshToc:'$refreshToc', urlPntStr:'$urlPntStr', $strJS}";

}

?>