// This is a script for Directory Opus.
// See https://www.gpsoft.com.au/DScripts/redirect.asp?page=scripts for development information.

function OnInit(initData)
{
	initData.name = "HasGPS";
	initData.version = "1.0";
	initData.copyright = "(c) 2018 Leo Davidson";
	initData.url = "https://resource.dopus.com/t/image-gps-location-filtering/30369";
	initData.desc = "";
	initData.default_enable = true;
	initData.min_version = "12.10";

	var col = initData.AddColumn();
	col.name = "GPS";
	col.method = "OnGPS";
	col.label = "GPS?";
	col.justify = "left";
	col.autogroup = true;
	col.match.push_back(ValueString(true));
	col.match.push_back(ValueString(false));
}

function OnGPS(scriptColData)
{
	var hasGPS = HasGPS(scriptColData.item);

	scriptColData.value = ValueString(hasGPS);
}

function ValueString(hasGPS)
{
	return hasGPS ? "GPS" : "No GPS";
}

function HasGPS(item)
{
	var imageMeta = item.metadata.image;
	if (imageMeta == null)
		return false;

	var lat = imageMeta.latitude;
	var lon = imageMeta.longitude;
	if (lat == null || lon == null || typeof(lat) != "number" || typeof(lon) != "number")
		return false;

	return true;
}