Sync two switches.groovy

/**

 *  Two Way Switch Sync

 *

 *  Current Version: 1.0

 *

 *

 *

 *  Copyright 2015 Tim Slagle

 *

 *  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

 *  in compliance with the License. You may obtain a copy of the License at:

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *	The original licensing applies, with the following exceptions:

 *		1.	These modifications may NOT be used without freely distributing all these modifications freely

 *			and without limitation, in source form.	 The distribution may be met with a link to source code

 *			with these modifications.

 *		2.	These modifications may NOT be used, directly or indirectly, for the purpose of any type of

 *			monetary gain.	These modifications may not be used in a larger entity which is being sold,

 *			leased, or anything other than freely given.

 *		3.	To clarify 1 and 2 above, if you use these modifications, it must be a free project, and

 *			available to anyone with "no strings attached."	 (You may require a free registration on

 *			a free website or portal in order to distribute the modifications.)

 *		4.	The above listed exceptions to the original licensing do not apply to the holder of the

 *			copyright of the original work.	 The original copyright holder can use the modifications

 *			to hopefully improve their original work.  In that event, this author transfers all claim

 *			and ownership of the modifications to "SmartThings."

 *

 *	Original Copyright information:

 *

 *	Copyright 2015 SmartThings

 *

 *	Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

 *	in compliance with the License. You may obtain a copy of the License at:

 *

 *		http://www.apache.org/licenses/LICENSE-2.0

 *

 *	Unless required by applicable law or agreed to in writing, software distributed under the License is distributed

 *	on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License

 *	for the specific language governing permissions and limitations under the License.

 *

 */

definition(

	name: "Two Way Switch Sync",

	namespace: "tslagle13",

	author: "Tim Slagle",

	description: "Syncs two swtich states between each other.",

	category: "Convenience",

	iconUrl: "https://s3.amazonaws.com/smartapp-icons/Meta/light_outlet.png",

	iconX2Url: "https://s3.amazonaws.com/smartapp-icons/Meta/light_outlet@2x.png"

)



preferences {

	section("Multi-switch") {

		input "switch1", "capability.switch", required: true

	}

	section("Single switch") {

		input "switch2", "capability.switch", required: true

	}  

}



def installed()
{
    initialize()
}



def updated()
{
    unsubscribe()
    initialize()
}

def initialize()
{
	subscribe(switch1, "switch.on", onHandler1)
	subscribe(switch1, "switch.off", offHandler1)
	subscribe(switch2, "switch.on", onHandler2)
    subscribe(switch2, "switch.off", offHandler2)  
}



def onHandler1(evt) {
    if(switch2.latestValue("switch").contains("off")){
    log.debug evt.value
    	switch2.on()
    }

}


def offHandler1(evt) {
    if(switch2.latestValue("switch").contains("on")){
    log.debug evt.value
    	switch2.off()
    }
}



def onHandler2(evt) {

	if(switch1.latestValue("switch").contains("off")){
    log.debug evt.value

    	switch1.on()

    }

}



def offHandler2(evt) {

	if(switch1.latestValue("switch").contains("on")){
    log.debug evt.value

    	switch1.off()

    }

}