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/*
* Copyright (c) 2010-2015, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.presence;
import com.isode.stroke.elements.Payload;
import com.isode.stroke.elements.Presence;
/**
* This presence sender adds payloads to outgoing presences.
*
* This class isn't meant to be used with directed presence.
*/
public class PayloadAddingPresenceSender implements PresenceSender {
private Presence lastSentPresence;
private final PresenceSender sender;
private Payload payload;
public PayloadAddingPresenceSender(PresenceSender sender) {
this.sender = sender;
}
public void sendPresence(Presence presence) {
if (presence.isAvailable()) {
if (presence.getTo() != null && !presence.getTo().isValid()) {
lastSentPresence = presence;
}
} else {
lastSentPresence = null;
}
if (payload != null) {
Presence sentPresence = new Presence(presence);
sentPresence.updatePayload(payload);
sender.sendPresence(sentPresence);
} else {
sender.sendPresence(presence);
}
}
public boolean isAvailable() {
return sender.isAvailable();
}
/**
* Sets the payload to be added to outgoing presences. If initial presence
* has been sent, this will resend the last sent presence with an updated
* payload. Initial presence is reset when unavailable presence is sent, or
* when reset() is called.
*/
public void setPayload(Payload payload) {
this.payload = payload;
if (lastSentPresence != null) {
sendPresence(lastSentPresence);
}
}
/**
* Resets the presence sender. This puts the presence sender back in the
* initial state (before initial presence has been sent). This also resets
* the chained sender.
*/
public void reset() {
lastSentPresence = null;
}
}
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