function $(id){
	return document.getElementById(id);
}

function pathSplit(path){
	var s = path.split("/");
	if (s[0] == ""){
		s.splice(0,1);
	}
	return s;
}


function callURL(url, content, asyncReceiver = null, method = "GET"){
	var r = new XMLHttpRequest();
	var async = asyncReceiver != null;

	r.open(method,url,async);
	if (async) {
		r.onload = asyncReceiver;
	}
	r.send(content);
	if (!async){
		return r.response;
	}
}

function callJson(method, parameters, asyncReceiver = null){
	var url = "<%=request.self(0)%>_hm_json";
	var reply = callURL(url, JSON.stringify( { "method": method, "parameters": parameters } ), null, "POST" );
	return JSON.parse( reply );
}


function treeRefresh(objPath){
	var treediv = $("tree");
	var url = objPath + "/_hm_tree";
	var treesource = callURL(url);
	treediv.innerHTML = treesource;

	editorLoad(objPath);
}

function editorLoad(objPath){
	var editor = $("editor");
	var url = objPath + "/_hm_edit";
	var treesource = callURL(url);
	editor.innerHTML = treesource;
}





function objCreate( objPath, objTypeName, objName){
	var reply = callJson( "objCreate", { "objTypeName" : objTypeName, "objName" : objName, "objPath" : objPath } )
	return reply;
}

function objRemove( objPath ){
	return callJson( "objRemove", { "objPath": objPath } );
}




function onAddObjectButton(button){
	var objPath = pathSplit( button.getAttribute("objPath") );
	var objName = $("objName").value;
	var objTypeName = $("objTypeName").value;

	if (objPath[0] == ""){
		objPath.splice(0,1);
	}

	var reply = objCreate( objPath, objTypeName, objName );
	if (reply.result != true){
		alert("The request didn't return success.\n" + reply.exception);
	} else {
		treeRefresh("<%=request.SCRIPT_NAME%>" + objPath);
	}
}

function onRemoveButton(button){
	var objPath = pathSplit( button.getAttribute("objPath") );
	var reply = objRemove( objPath );
	if (reply.result == true){
		treeRefresh("<%=request.SCRIPT_NAME%>" + $("currentnode").getAttribute("objPath"));
	} else {
		alert("The request didn't return success.\n" + reply.exception);
	}
}