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/*
 * Copyright (c) 2010 Kevin Smith
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include "Swift/Controllers/Chat/ChatController.h"

#include <boost/bind.hpp>
#include <stdio.h>

#include <Swift/Controllers/Intl.h>
#include <Swiften/Base/format.h>
#include "Swiften/Avatars/AvatarManager.h"
#include "Swiften/Chat/ChatStateNotifier.h"
#include "Swiften/Chat/ChatStateTracker.h"
#include "Swiften/Client/StanzaChannel.h"
#include "Swiften/Disco/EntityCapsProvider.h"
#include "Swift/Controllers/UIInterfaces/ChatWindow.h"
#include "Swift/Controllers/UIInterfaces/ChatWindowFactory.h"
#include "Swiften/Client/NickResolver.h"
#include "Swift/Controllers/XMPPEvents/EventController.h"
#include <Swift/Controllers/StatusUtil.h>

namespace Swift {
	
/**
 * The controller does not gain ownership of the stanzaChannel, nor the factory.
 */
ChatController::ChatController(const JID& self, StanzaChannel* stanzaChannel, IQRouter* iqRouter, ChatWindowFactory* chatWindowFactory, const JID &contact, NickResolver* nickResolver, PresenceOracle* presenceOracle, AvatarManager* avatarManager, bool isInMUC, bool useDelayForLatency, UIEventStream* eventStream, EventController* eventController, TimerFactory* timerFactory, EntityCapsProvider* entityCapsProvider)
	: ChatControllerBase(self, stanzaChannel, iqRouter, chatWindowFactory, contact, presenceOracle, avatarManager, useDelayForLatency, eventStream, eventController, timerFactory) {
	isInMUC_ = isInMUC;
	lastWasPresence_ = false;
	chatStateNotifier_ = new ChatStateNotifier(stanzaChannel, contact, entityCapsProvider);
	chatStateTracker_ = new ChatStateTracker();
	nickResolver_ = nickResolver;
	presenceOracle_->onPresenceChange.connect(boost::bind(&ChatController::handlePresenceChange, this, _1));
	chatStateTracker_->onChatStateChange.connect(boost::bind(&ChatWindow::setContactChatState, chatWindow_, _1));
	stanzaChannel_->onStanzaAcked.connect(boost::bind(&ChatController::handleStanzaAcked, this, _1));
	nickResolver_->onNickChanged.connect(boost::bind(&ChatController::handleContactNickChanged, this, _1, _2));
	std::string nick = nickResolver_->jidToNick(toJID_);
	chatWindow_->setName(nick);
	std::string startMessage;
	Presence::ref theirPresence;
	if (isInMUC) {
		startMessage = str(format(QT_TRANSLATE_NOOP("", "Starting chat with %1% in chatroom %2%")) % nick % contact.toBare().toString());
		theirPresence = presenceOracle->getLastPresence(contact);
	} else {
		startMessage = str(format(QT_TRANSLATE_NOOP("", "Starting chat with %1% - %2%")) % nick % contact.toBare().toString());
		theirPresence = contact.isBare() ? presenceOracle->getHighestPriorityPresence(contact.toBare()) : presenceOracle->getLastPresence(contact);
	}
	startMessage += ": " + statusShowTypeToFriendlyName(theirPresence ? theirPresence->getShow() : StatusShow::None);
	if (theirPresence && !theirPresence->getStatus().empty()) {
		startMessage += " (" + theirPresence->getStatus() + ")";
	}
	lastShownStatus_ = theirPresence ? theirPresence->getShow() : StatusShow::None;
	chatStateNotifier_->setContactIsOnline(theirPresence && theirPresence->getType() == Presence::Available);
	startMessage += ".";
	chatWindow_->addSystemMessage(startMessage);
	chatWindow_->onUserTyping.connect(boost::bind(&ChatStateNotifier::setUserIsTyping, chatStateNotifier_));
	chatWindow_->onUserCancelsTyping.connect(boost::bind(&ChatStateNotifier::userCancelledNewMessage, chatStateNotifier_));

}

void ChatController::handleContactNickChanged(const JID& jid, const std::string& /*oldNick*/) {
	if (jid.toBare() == toJID_.toBare()) {
		chatWindow_->setName(nickResolver_->jidToNick(jid));
	}
}

ChatController::~ChatController() {
	nickResolver_->onNickChanged.disconnect(boost::bind(&ChatController::handleContactNickChanged, this, _1, _2));
	delete chatStateNotifier_;
	delete chatStateTracker_;
}

void ChatController::setToJID(const JID& jid) {
	chatStateNotifier_->setContact(jid);
	ChatControllerBase::setToJID(jid);
	Presence::ref presence;
	if (isInMUC_) {
		presence = presenceOracle_->getLastPresence(jid);
	} else {
		presence = jid.isBare() ? presenceOracle_->getHighestPriorityPresence(jid.toBare()) : presenceOracle_->getLastPresence(jid);
	}
	chatStateNotifier_->setContactIsOnline(presence && presence->getType() == Presence::Available);
}

bool ChatController::isIncomingMessageFromMe(boost::shared_ptr<Message>) {
	return false;
}

void ChatController::preHandleIncomingMessage(boost::shared_ptr<MessageEvent> messageEvent) {
	if (messageEvent->isReadable()) {
		chatWindow_->flash();
		lastWasPresence_ = false;
	}
	boost::shared_ptr<Message> message = messageEvent->getStanza();
	JID from = message->getFrom();
	if (!from.equals(toJID_, JID::WithResource)) {
		if (toJID_.equals(from, JID::WithoutResource)  && toJID_.isBare()){
			setToJID(from);
		}
	}
	boost::shared_ptr<Replace> replace = message->getPayload<Replace>();
	if (replace) {
		// Determine the timestamp
		boost::posix_time::ptime timeStamp = boost::posix_time::microsec_clock::universal_time();
		boost::optional<boost::posix_time::ptime> messageTimeStamp = getMessageTimestamp(message);
		if (messageTimeStamp) {
			timeStamp = *messageTimeStamp;
		}
		std::string body = message->getBody();
		chatWindow_->replaceMessage(body, lastMessageUIID_, timeStamp);
		replacedMessage_ = true;
	}
	else {
		replacedMessage_ = false;
	}
	chatStateTracker_->handleMessageReceived(message);
	chatStateNotifier_->receivedMessageFromContact(message->getPayload<ChatState>());
}

void ChatController::postHandleIncomingMessage(boost::shared_ptr<MessageEvent> messageEvent) {
	eventController_->handleIncomingEvent(messageEvent);
}


void ChatController::preSendMessageRequest(boost::shared_ptr<Message> message) {
	chatStateNotifier_->addChatStateRequest(message);
}

void ChatController::postSendMessage(const std::string& body, boost::shared_ptr<Stanza> sentStanza) {
	if (stanzaChannel_->getStreamManagementEnabled() && !myLastMessageUIID_.empty()) {
		chatWindow_->setAckState(myLastMessageUIID_, ChatWindow::Pending);
		unackedStanzas_[sentStanza] = myLastMessageUIID_;
	}
	boost::shared_ptr<Replace> replace = sentStanza->getPayload<Replace>();
	if (replace) {
		chatWindow_->replaceMessage(body, myLastMessageUIID_, boost::posix_time::microsec_clock::universal_time());
	} else {
		myLastMessageUIID_ = addMessage(body, QT_TRANSLATE_NOOP("", "me"), true, labelsEnabled_ ? chatWindow_->getSelectedSecurityLabel().getLabel() : boost::shared_ptr<SecurityLabel>(), std::string(avatarManager_->getAvatarPath(selfJID_).string()), boost::posix_time::microsec_clock::universal_time());
		if (stanzaChannel_->getStreamManagementEnabled()) {
			chatWindow_->setAckState(myLastMessageUIID_, ChatWindow::Pending);
			unackedStanzas_[sentStanza] = myLastMessageUIID_;
		}
	}
	lastWasPresence_ = false;
	chatStateNotifier_->userSentMessage();
}

void ChatController::handleStanzaAcked(boost::shared_ptr<Stanza> stanza) {
	std::map<boost::shared_ptr<Stanza>, std::string>::iterator unackedStanza = unackedStanzas_.find(stanza);
	if (unackedStanza != unackedStanzas_.end()) {
		chatWindow_->setAckState(unackedStanza->second, ChatWindow::Received);
		unackedStanzas_.erase(unackedStanza);
	}
}

void ChatController::setOnline(bool online) {
	if (!online) {
		std::map<boost::shared_ptr<Stanza>, std::string>::iterator it = unackedStanzas_.begin();
		for ( ; it != unackedStanzas_.end(); it++) {
			chatWindow_->setAckState(it->second, ChatWindow::Failed);
		}
		unackedStanzas_.clear();

		Presence::ref fakeOffline(new Presence());
		fakeOffline->setFrom(toJID_);
		fakeOffline->setType(Presence::Unavailable);
		chatStateTracker_->handlePresenceChange(fakeOffline);
	}
	ChatControllerBase::setOnline(online);
}

std::string ChatController::senderDisplayNameFromMessage(const JID& from) {
	return nickResolver_->jidToNick(from);
}

std::string ChatController::getStatusChangeString(boost::shared_ptr<Presence> presence) {
	std::string nick = senderDisplayNameFromMessage(presence->getFrom());
	std::string response;
	if (!presence || presence->getType() == Presence::Unavailable || presence->getType() == Presence::Error) {
		response = QT_TRANSLATE_NOOP("", "%1% has gone offline");
	} else if (presence->getType() == Presence::Available) {
		StatusShow::Type show = presence->getShow();
		if (show == StatusShow::Online || show == StatusShow::FFC) {
			response = QT_TRANSLATE_NOOP("", "%1% has become available");
		} else if (show == StatusShow::Away || show == StatusShow::XA) {
			response = QT_TRANSLATE_NOOP("", "%1% has gone away");
		} else if (show == StatusShow::DND) {
			response = QT_TRANSLATE_NOOP("", "%1% is now busy");
		} 
	}
	if (!response.empty()) {
		response = str(format(response) % nick);
	}

	if (!presence->getStatus().empty()) {
		response += " (" + presence->getStatus() + ")";
	}
	return response + ".";
}

void ChatController::handlePresenceChange(boost::shared_ptr<Presence> newPresence) {
	bool me = false;
	if (toJID_.isBare()) {
		newPresence = presenceOracle_->getHighestPriorityPresence(toJID_);
		if ((newPresence ? newPresence->getShow() : StatusShow::None) != lastShownStatus_) {
			me = true;
		}
	} else if (toJID_.equals(newPresence->getFrom(), JID::WithResource)) {
		me = true;
	}
	if (!me) {
		return;
	}
	if (!newPresence) {
		newPresence = boost::shared_ptr<Presence>(new Presence());
		newPresence->setType(Presence::Unavailable);
	}
	lastShownStatus_ = newPresence->getShow();

	chatStateTracker_->handlePresenceChange(newPresence);
	chatStateNotifier_->setContactIsOnline(newPresence->getType() == Presence::Available);
	std::string newStatusChangeString = getStatusChangeString(newPresence);
	if (newStatusChangeString != lastStatusChangeString_) {
		if (lastWasPresence_) {
			chatWindow_->replaceLastMessage(newStatusChangeString);
		} else {
			chatWindow_->addPresenceMessage(newStatusChangeString);
		}
		lastStatusChangeString_ = newStatusChangeString;
		lastWasPresence_ = true;
	}
}

boost::optional<boost::posix_time::ptime> ChatController::getMessageTimestamp(boost::shared_ptr<Message> message) const {
	return message->getTimestamp();
}

}