/*
 * Compile with:
 * valac --pkg=glib-2.0 --pkg=libsoup-2.4 --pkg=json-glib-1.0 geoip.vala
 *
 * Get country code from IP address.
 *
 */

public class GeoIP : Object {

	private const string HOSTNAME = "www.telize.com";
	private string address;

	private Soup.URI uri;
	#if LIBSOUP_2_42
		private Soup.Session session;
	#else
		private Soup.SessionSync session;
	#endif
	private Soup.Message msg;

	public GeoIP () {
		/* Create Soup.URI object */
		address = "http://%s".printf (HOSTNAME);
		this.uri = new Soup.URI (address);

		/* Create session object */
		#if LIBSOUP_2_42
			this.session = new Soup.Session ();
		#else
			this.session = new Soup.SessionSync ();
		#endif
	}

	public void run (string resource) {
		string content = null;

		content = send_query (resource);
		if (content != null) {
			parse_json (content);
		}
	}

	private void parse_json (string data) {
		Json.Parser parser;
		Json.Node node;
		unowned Json.Object obj;

		parser = new Json.Parser ();
		try {
			parser.load_from_data (data);
		} catch (GLib.Error e) {
			stderr.printf ("Error: '%s'\n", e.message);
		}

		node = parser.get_root ();
		if (node.get_node_type () == Json.NodeType.OBJECT) {
			obj = node.get_object ();
			foreach (unowned string name in obj.get_members ()) {
				if (name == "country_code") {
					unowned string item;

					item = obj.get_string_member (name);
					stdout.printf ("%s\n", item.down ());
				}
			}
		}
	}

	private string send_query (string resource) {
		string content = null;

		this.uri.set_path ("/%s".printf (resource));
		msg = new Soup.Message.from_uri ("GET", this.uri);
		this.session.send_message (msg);

		#if VALA_0_22
			if (Soup.Status.OK == msg.status_code) {
		#else
			if (Soup.KnownStatusCode.OK == msg.status_code) {
		#endif
			content = (string) msg.response_body.flatten ().data;
		}

		return content;
	}
}

void main (string[] argv) {
	string path = "geoip";

	GeoIP ip;

	ip = new GeoIP ();
	ip.run (path);
}