2 files changed, 144 insertions, 0 deletions
diff --git a/src/com/isode/stroke/chat/ChatStateNotifier.java b/src/com/isode/stroke/chat/ChatStateNotifier.java
new file mode 100644
index 0000000..dc96565
--- /dev/null
+++ b/src/com/isode/stroke/chat/ChatStateNotifier.java
@@ -0,0 +1,110 @@
+/*
+ * 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.chat;
+
+import com.isode.stroke.elements.Message;
+import com.isode.stroke.elements.ChatState;
+import com.isode.stroke.elements.DiscoInfo;
+import com.isode.stroke.disco.EntityCapsProvider;
+import com.isode.stroke.client.StanzaChannel;
+import com.isode.stroke.signals.SignalConnection;
+import com.isode.stroke.signals.Slot1;
+import com.isode.stroke.jid.JID;
+
+public class ChatStateNotifier {
+
+	private StanzaChannel stanzaChannel_;
+	private EntityCapsProvider entityCapsManager_;
+	private JID contact_ = new JID();
+	private boolean contactHas85Caps_;
+	private boolean contactHasSentActive_;
+	private boolean userIsTyping_;
+	private boolean contactIsOnline_;
+	private SignalConnection onCapsChangedConnection;
+
+	public ChatStateNotifier(StanzaChannel stanzaChannel, JID contact, EntityCapsProvider entityCapsManager) {
+		this.stanzaChannel_ = stanzaChannel;
+		this.contact_ = contact;
+		this.entityCapsManager_ = entityCapsManager;
+		setContact(contact);
+		onCapsChangedConnection = entityCapsManager_.onCapsChanged.connect(new Slot1<JID>() {
+
+			public void call(JID j1) {
+				handleCapsChanged(j1);
+			}
+		});
+	}
+
+	private boolean contactShouldReceiveStates() {
+		/* So, yes, the XEP says to look at caps, but it also says that once you've
+			 heard from the contact, the active state overrides this.
+			 *HOWEVER* it says that the MUST NOT send csn if you haven't received
+			 active is OPTIONAL behaviour for if you haven't got caps.*/
+		return contactIsOnline_ && (contactHasSentActive_ || contactHas85Caps_);
+	}
+
+	private void changeState(ChatState.ChatStateType state) {
+		Message message = new Message();
+		message.setTo(contact_);
+		message.addPayload(new ChatState(state));
+		stanzaChannel_.sendMessage(message);
+	}
+
+	private void handleCapsChanged(JID jid) {
+		if (jid.equals(contact_)) {
+			DiscoInfo caps = entityCapsManager_.getCaps(contact_);
+			boolean hasCSN = (caps != null) && (caps.hasFeature(DiscoInfo.ChatStatesFeature));
+			contactHas85Caps_ = hasCSN;
+		}
+	}
+
+	public void setContact(JID contact) {
+		contactHasSentActive_ = false;
+		userIsTyping_ = false;
+		contactIsOnline_ = false;
+		contact_ = contact;
+		handleCapsChanged(contact_);
+	}
+
+	public void addChatStateRequest(Message message) {
+		if (contactShouldReceiveStates()) {
+			message.addPayload(new ChatState(ChatState.ChatStateType.Active));
+		}
+	}
+
+	public void setUserIsTyping() {
+		boolean should = contactShouldReceiveStates();
+		if (should && !userIsTyping_) {
+			userIsTyping_ = true;
+			changeState(ChatState.ChatStateType.Composing);
+		}
+	}
+
+	public void userSentMessage() {
+		userIsTyping_ = false;
+	}
+
+	public void userCancelledNewMessage() {
+		if (userIsTyping_) {
+			userIsTyping_ = false;
+			changeState(ChatState.ChatStateType.Active);
+		}
+	}
+
+	public void receivedMessageFromContact(boolean hasActiveElement) {
+		contactHasSentActive_ = hasActiveElement;
+	}
+
+	public void setContactIsOnline(boolean online) {
+		contactIsOnline_ = online;
+	}
+}
diff --git a/src/com/isode/stroke/disco/DummyEntityCapsProvider.java b/src/com/isode/stroke/disco/DummyEntityCapsProvider.java
new file mode 100644
index 0000000..708de7c
--- /dev/null
+++ b/src/com/isode/stroke/disco/DummyEntityCapsProvider.java
@@ -0,0 +1,34 @@
+/*
+ * 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.disco;
+
+import com.isode.stroke.disco.EntityCapsProvider;
+import com.isode.stroke.jid.JID;
+import com.isode.stroke.elements.DiscoInfo;
+import java.util.Map;
+import java.util.HashMap;
+
+public class DummyEntityCapsProvider extends EntityCapsProvider {
+
+	public Map<JID, DiscoInfo> caps = new HashMap<JID, DiscoInfo>();
+
+	public DummyEntityCapsProvider() {
+
+	}
+
+	public DiscoInfo getCaps(JID jid) {
+		if(caps.containsKey(jid)) {
+			return caps.get(jid);
+		}
+		return null;
+	}
+}
+\ No newline at end of file