[mapguide-users] Adding a temporary Layer in MapGuide

[Carmelo Saffioti]

Thank you for your help!
I'm seeing that the code you posted is very similar to the buffer code, 
however I'm really new to MapGuide, so I hope you can help me understanding 
how to make it work.

I created a Layout, using MapGuide Studio, on which I added a new custom 
command for the Task panel, named "Route tracing". Therefore I created the 
route_tracing.jsp file, on which I'm trying to use your code (translating it 
from PHP to JSP) or the buffer.jsp code (which is already in JSP).

On both your code and buffer.jsp there is this code:
mapName = GetParameter(request, "MAPNAME");
sessionId = GetParameter(request, "SESSION");

- The question is: how can I pass the MAPNAME and SESSION values to the web 
page?

The final result should be a web page, which opens when its Action Task item 
is clicked, on which I can select and digit some options. After clicking a 
button the page should get these values, and display the map with the 
calculated additional layer on it.



I hope you can help me about that
Cheers
Carmelo



----- Original Message ----- 
From: "Arnaud De Groof" <Arnaud.DeGroof at spacebel.be>
To: "MapGuide Users Mail List" <mapguide-users at lists.osgeo.org>
Sent: Monday, January 12, 2009 4:18 PM
Subject: RE: [mapguide-users] Adding a temporary Layer in MapGuide


The first code :
<?php

// Vital includes.

include "../../mapviewerphp/constants.php";

include "../../mapviewerphp/common.php";





$args = ($_SERVER['REQUEST_METHOD'] == "POST") ? $_POST : $_GET;

$sessionId = $args['SESSION'];

$mapName = $args['MAPNAME'];

$layerName1 = 'YYY';

$rlLayerResourceId = "Library://XXX/$layerName1.LayerDefinition";



InitializeWebTier();



$userInfo = new MgUserInformation($sessionId);

$siteConnection = new MgSiteConnection();

$siteConnection->Open($userInfo);

$resourceService =
$siteConnection->CreateService(MgServiceType::ResourceService);



// Read the MapDefinition into an XML DOM document object.

$md = " Library://XXX/$mapName.MapDefinition "; // TODO Constant!

$mdResourceId = new MgResourceIdentifier($md);

$mdReader = $resourceService->GetResourceContent($mdResourceId);

$mdXml = $mdReader->ToString();

$mdDomDoc = DOMDocument::loadXML($mdXml);



// Add a new MapLayer

$targetNode = $mdDomDoc->getElementsByTagName("MapLayer")->item(0);

$newNode = $targetNode->parentNode->insertBefore(new
DOMElement("MapLayer"), $targetNode);

$newNode->appendChild($mdDomDoc->createElement("Name", $layerName1));

$newNode->appendChild($mdDomDoc->createElement("ResourceId",
$rlLayerResourceId));

$newNode->appendChild($mdDomDoc->createElement("Selectable", "false"));

$newNode->appendChild($mdDomDoc->createElement("ShowInLegend",
"false"));

$newNode->appendChild($mdDomDoc->createElement("LegendLabel"));

$newNode->appendChild($mdDomDoc->createElement("ExpandInLegend",
"false"));

$newNode->appendChild($mdDomDoc->createElement("Visible", "true"));

$newNode->appendChild($mdDomDoc->createElement("Group"));



// Save the updated MapDefinition

$updatedXml = $mdDomDoc->saveXML();

$byteSource = new MgByteSource($updatedXml, strlen($updatedXml));



// Create the temporary MapDefinition

$sessionMapName = $mdResourceId->GetName();

$sessionMapDefinition =
"Session:$sessionId//$sessionMapName.MapDefinition";

$sessionResourceId = new MgResourceIdentifier($sessionMapDefinition);



// Write the updated MapDefinition

$resourceService->SetResource($sessionResourceId,
$byteSource->GetReader(), null);



//Test the updated MapDefinition

$md1 = "Session:$sessionId//X.MapDefinition";

$mdResourceId2 = new MgResourceIdentifier($md1);

$mdReader2 = $resourceService->GetResourceContent($mdResourceId2);

$mdXml2 = $mdReader2->ToString();

$mdDomDoc2 = DOMDocument::loadXML($mdXml2);





// Read the WebLayout into an XML DOM document object.

$wl = "Library://XXX/XXX.WebLayout"; // TODO Constant!

$wlResourceId = new MgResourceIdentifier($wl);

$wlReader = $resourceService->GetResourceContent($wlResourceId);

$wlXml = $wlReader->ToString();

$wlDomDoc = DOMDocument::loadXML($wlXml);



// Now, update the MapDefinition.

$mapdef = $wlDomDoc->getElementsByTagName("ResourceId")->item(0);

$mapdef->nodeValue = "$md1";



// Prepare the updated XML to be written out to the session.

$wlupdatedXml = $wlDomDoc->saveXML();

$wlbyteSource = new MgByteSource($wlupdatedXml, strlen($wlupdatedXml));



// Create a temporary WebLayout

$wlsessionMapName = $wlResourceId->GetName();

$wlsessionWebLayout = "Session:$sessionId//$wlsessionMapName.WebLayout";

$wlsessionResourceId = new MgResourceIdentifier($wlsessionWebLayout);



// Write the updated WebLayout to the session.

$resourceService->SetResource($wlsessionResourceId,
$wlbyteSource->GetReader(), null);



// Redirect to the Ajax viewer.

$redirectTo =
"mapguide/mapviewerajax/?SESSION=$sessionId&WEBLAYOUT=$wlsessionWebLayou
t";

$host = $_SERVER["HTTP_HOST"];

$url = "http://$host/$redirectTo";



//Test

$f = 'test.txt';

$handle = fopen($f,"w");

fwrite($handle, "test1:<".$mdXml.">\r\ntest 2 :<".$updatedXml.">\r\ntest
3 :<".$wlXml.">\r\ntest 4 :<".$wlupdatedXml.">\r\ntest 5 :<".$url.">");

fclose($handle);



// Redirect!

header("Location: $url");

exit;



?>

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