1 files changed, 75 insertions, 0 deletions
diff --git a/src/com/isode/stroke/avatars/CombinedAvatarProvider.java b/src/com/isode/stroke/avatars/CombinedAvatarProvider.java
new file mode 100755
index 0000000..0426bd6
--- /dev/null
+++ b/src/com/isode/stroke/avatars/CombinedAvatarProvider.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2010 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 implements AvatarProvider {
+
+	private Vector<AvatarProvider> providers = new Vector<AvatarProvider>();
+	private Map<JID, String> avatars = new HashMap<JID, String>();
+	private SignalConnection onAvatarChangedConnection_;
+	private Logger logger_ = Logger.getLogger(this.getClass().getName());
+
+	public String getAvatarHash(JID jid) {
+		return getCombinedAvatarAndCache(jid);
+	}
+
+	public void addProvider(AvatarProvider provider) {
+		onAvatarChangedConnection_ = provider.onAvatarChanged.connect(new Slot1<JID>() {
+
+			public void call(JID p1) {
+				handleAvatarChanged(p1);
+			}
+		});
+		providers.add(provider);
+	}
+
+	public void removeProvider(AvatarProvider provider) {
+		while(providers.contains(provider)) {
+			providers.remove(provider);
+			onAvatarChangedConnection_.disconnect();
+		}
+	}
+
+	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;
+	}
+}
+\ No newline at end of file