UDPHome.java

package com.bwssystems.HABridge.plugins.udp;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.xml.bind.DatatypeConverter;

import org.apache.commons.lang3.StringEscapeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.bwssystems.HABridge.BridgeSettings;
import com.bwssystems.HABridge.Home;
import com.bwssystems.HABridge.api.CallItem;
import com.bwssystems.HABridge.dao.DeviceDescriptor;
import com.bwssystems.HABridge.hue.BrightnessDecode;
import com.bwssystems.HABridge.hue.DeviceDataDecode;
import com.bwssystems.HABridge.hue.MultiCommandUtil;
import com.bwssystems.HABridge.hue.TimeDecode;
import com.bwssystems.HABridge.util.UDPDatagramSender;

public class UDPHome implements Home {
    private static final Logger log = LoggerFactory.getLogger(UDPHome.class);
    private UDPDatagramSender theUDPDatagramSender;
	private byte[] sendData;
    
	public UDPHome(BridgeSettings bridgeSettings, UDPDatagramSender aUDPDatagramSender) {
		super();
		theUDPDatagramSender = aUDPDatagramSender;
		createHome(bridgeSettings);
	}

	@Override
	public String deviceHandler(CallItem anItem, MultiCommandUtil aMultiUtil, String lightId, int intensity,
			Integer targetBri,Integer targetBriInc, DeviceDescriptor device, String body) {
		log.debug("executing HUE api request to UDP: " + anItem.getItem().getAsString());
		String theUrl = anItem.getItem().getAsString();
		if(theUrl != null && !theUrl.isEmpty () && theUrl.startsWith("udp://")) {
			String intermediate = theUrl.substring(theUrl.indexOf("://") + 3);
			String hostPortion = intermediate.substring(0, intermediate.indexOf('/'));
			String theUrlBody = intermediate.substring(intermediate.indexOf('/') + 1);
			String hostAddr = null;
			String port = null;
			InetAddress IPAddress = null;
			if (hostPortion.contains(":")) {
				hostAddr = hostPortion.substring(0, intermediate.indexOf(':'));
				port = hostPortion.substring(intermediate.indexOf(':') + 1);
			} else
				hostAddr = hostPortion;
			try {
				IPAddress = InetAddress.getByName(hostAddr);
			} catch (UnknownHostException e) {
				log.warn("Udp Call, unknown host, continuing...");
				return null;
			}
	
			theUrlBody = TimeDecode.replaceTimeValue(theUrlBody);
			if (theUrlBody.startsWith("0x")) {
				theUrlBody = BrightnessDecode.calculateReplaceIntensityValue(theUrlBody, intensity, targetBri, targetBriInc, true);
				theUrlBody = DeviceDataDecode.replaceDeviceData(theUrlBody, device);
				sendData = DatatypeConverter.parseHexBinary(theUrlBody.substring(2));
			} else {
				theUrlBody = BrightnessDecode.calculateReplaceIntensityValue(theUrlBody, intensity, targetBri, targetBriInc, false);
				theUrlBody = DeviceDataDecode.replaceDeviceData(theUrlBody, device);
				theUrlBody = StringEscapeUtils.unescapeJava(theUrlBody);
				sendData = theUrlBody.getBytes();
			}
			try {
				theUDPDatagramSender.sendUDPResponse(sendData, IPAddress, Integer.parseInt(port));
			} catch (NumberFormatException e) {
				log.warn("Udp Call, Number format exception on port, continuing...");
			} catch (IOException e) {
				log.warn("IO exception on udp call, continuing...");
			}
		} else
			log.warn("Udp Call to be presented as udp://<ip_address>:<port>/payload, format of request unknown: " + theUrl);

		return null;
	}

	@Override
	public Home createHome(BridgeSettings bridgeSettings) {
		log.info("UDP Home created.");
		return this;
	}

	@Override
	public Object getItems(String type) {
		// Not a resource
		return null;
	}

	@Override
	public void closeHome() {
		// TODO Auto-generated method stub
		
	}

}