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/*
* Copyright (c) 2010-2015 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
/*
* Copyright (c) 2015 Tarun Gupta.
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
package com.isode.stroke.avatars;
import com.isode.stroke.avatars.AvatarProvider;
import com.isode.stroke.signals.SignalConnection;
import com.isode.stroke.signals.Slot1;
import com.isode.stroke.jid.JID;
import java.util.logging.Logger;
import java.util.*;
public class CombinedAvatarProvider extends AvatarProvider {
private final Vector<AvatarProvider> providers = new Vector<AvatarProvider>();
private Map<JID, String> avatars = new HashMap<JID, String>();
private final Map<AvatarProvider, SignalConnection> onAvatarChangedConnections_ = new HashMap<AvatarProvider, SignalConnection>();
private Logger logger_ = Logger.getLogger(this.getClass().getName());
@Override
public String getAvatarHash(JID jid) {
return getCombinedAvatarAndCache(jid);
}
private final Slot1<JID> onAvatarChangedSlot = new Slot1<JID>() {
@Override public void call(JID p1) {handleAvatarChanged(p1);}
};
public void addProvider(AvatarProvider provider) {
if (!onAvatarChangedConnections_.containsKey(provider)) {
onAvatarChangedConnections_.put(provider, provider.onAvatarChanged.connect(onAvatarChangedSlot));
}
providers.add(provider);
}
public void delete() {
for (SignalConnection connection : onAvatarChangedConnections_.values()) {
connection.disconnect();
}
for (AvatarProvider provider : providers) {
provider.delete();
}
}
private void handleAvatarChanged(JID jid) {
String oldHash = new String();
if(avatars.containsKey(jid)) {
oldHash = avatars.get(jid);
}
String newHash = getCombinedAvatarAndCache(jid);
if (newHash != null && !newHash.equals(oldHash)) {
logger_.fine("Avatar changed: " + jid + ": " + oldHash + " -> " + ((newHash != null) ? newHash : "NULL") + "\n");
onAvatarChanged.emit(jid);
}
}
private String getCombinedAvatarAndCache(JID jid) {
logger_.fine("JID: " + jid + "\n");
String hash = null;
for (int i = 0; i < providers.size() && (hash==null); ++i) {
hash = providers.get(i).getAvatarHash(jid);
logger_.fine("Provider " + providers.get(i) + ": " + ((hash != null) ? hash : "NULL") + "\n");
}
if (hash != null) {
avatars.put(jid, hash);
} else {
avatars.put(jid, "");
}
return hash;
}
}
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