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/*
 * Copyright (c) 2010-2015 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/Controllers/Chat/UserSearchController.h>

#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/smart_ptr/make_shared.hpp>

#include <Swiften/Avatars/AvatarManager.h>
#include <Swiften/Base/String.h>
#include <Swiften/Base/foreach.h>
#include <Swiften/Disco/DiscoServiceWalker.h>
#include <Swiften/Disco/GetDiscoInfoRequest.h>
#include <Swiften/Disco/GetDiscoItemsRequest.h>
#include <Swiften/Presence/PresenceOracle.h>
#include <Swiften/VCards/VCardManager.h>

#include <Swift/Controllers/ContactEditController.h>
#include <Swift/Controllers/ContactSuggester.h>
#include <Swift/Controllers/Intl.h>
#include <Swift/Controllers/ProfileSettingsProvider.h>
#include <Swift/Controllers/Roster/RosterController.h>
#include <Swift/Controllers/UIEvents/RequestAddUserDialogUIEvent.h>
#include <Swift/Controllers/UIEvents/RequestChatWithUserDialogUIEvent.h>
#include <Swift/Controllers/UIEvents/RequestInviteToMUCUIEvent.h>
#include <Swift/Controllers/UIEvents/UIEventStream.h>
#include <Swift/Controllers/UIInterfaces/UserSearchWindow.h>
#include <Swift/Controllers/UIInterfaces/UserSearchWindowFactory.h>

namespace Swift {

static const std::string SEARCHED_DIRECTORIES = "searchedDirectories";

UserSearchController::UserSearchController(Type type, const JID& jid, UIEventStream* uiEventStream, VCardManager* vcardManager, UserSearchWindowFactory* factory, IQRouter* iqRouter, RosterController* rosterController, ContactSuggester* contactSuggester, AvatarManager* avatarManager, PresenceOracle* presenceOracle, ProfileSettingsProvider* settings) : type_(type), jid_(jid), uiEventStream_(uiEventStream), vcardManager_(vcardManager), factory_(factory), iqRouter_(iqRouter), rosterController_(rosterController), contactSuggester_(contactSuggester), avatarManager_(avatarManager), presenceOracle_(presenceOracle), settings_(settings) {
	uiEventStream_->onUIEvent.connect(boost::bind(&UserSearchController::handleUIEvent, this, _1));
	vcardManager_->onVCardChanged.connect(boost::bind(&UserSearchController::handleVCardChanged, this, _1, _2));
	avatarManager_->onAvatarChanged.connect(boost::bind(&UserSearchController::handleAvatarChanged, this, _1));
	presenceOracle_->onPresenceChange.connect(boost::bind(&UserSearchController::handlePresenceChanged, this, _1));
	window_ = NULL;
	discoWalker_ = NULL;
	loadSavedDirectories();
}

UserSearchController::~UserSearchController() {
	endDiscoWalker();
	delete discoWalker_;
	if (window_) {
		window_->onNameSuggestionRequested.disconnect(boost::bind(&UserSearchController::handleNameSuggestionRequest, this, _1));
		window_->onFormRequested.disconnect(boost::bind(&UserSearchController::handleFormRequested, this, _1));
		window_->onSearchRequested.disconnect(boost::bind(&UserSearchController::handleSearch, this, _1, _2));
		window_->onJIDUpdateRequested.disconnect(boost::bind(&UserSearchController::handleJIDUpdateRequested, this, _1));
		window_->onJIDAddRequested.disconnect(boost::bind(&UserSearchController::handleJIDAddRequested, this, _1));
		delete window_;
	}
	presenceOracle_->onPresenceChange.disconnect(boost::bind(&UserSearchController::handlePresenceChanged, this, _1));
	avatarManager_->onAvatarChanged.disconnect(boost::bind(&UserSearchController::handleAvatarChanged, this, _1));
	vcardManager_->onVCardChanged.disconnect(boost::bind(&UserSearchController::handleVCardChanged, this, _1, _2));
	uiEventStream_->onUIEvent.disconnect(boost::bind(&UserSearchController::handleUIEvent, this, _1));
}

UserSearchWindow* UserSearchController::getUserSearchWindow() {
	initializeUserWindow();
	assert(window_);
	return window_;
}

void UserSearchController::setCanInitiateImpromptuMUC(bool supportsImpromptu) {
	if (!window_) {
		initializeUserWindow();
	}
	if (window_) {
		window_->setCanStartImpromptuChats(supportsImpromptu);
	} // Else doesn't support search
}

void UserSearchController::handleUIEvent(boost::shared_ptr<UIEvent> event) {
	bool handle = false;
	boost::shared_ptr<RequestAddUserDialogUIEvent> addUserRequest = boost::shared_ptr<RequestAddUserDialogUIEvent>();
	RequestInviteToMUCUIEvent::ref inviteToMUCRequest = RequestInviteToMUCUIEvent::ref();
	switch (type_) {
		case AddContact:
			if ((addUserRequest = boost::dynamic_pointer_cast<RequestAddUserDialogUIEvent>(event))) {
				handle = true;
			}
			break;
		case StartChat:
			if (boost::dynamic_pointer_cast<RequestChatWithUserDialogUIEvent>(event)) {
				handle = true;
			}
			break;
		case InviteToChat:
			if ((inviteToMUCRequest = boost::dynamic_pointer_cast<RequestInviteToMUCUIEvent>(event))) {
				handle = true;
			}
			break;
	}
	if (handle) {
		initializeUserWindow();
		window_->show();
		window_->addSavedServices(savedDirectories_);
		if (addUserRequest) {
			const std::string& name = addUserRequest->getPredefinedName();
			const JID& jid = addUserRequest->getPredefinedJID();
			if (!name.empty() && jid.isValid()) {
				window_->prepopulateJIDAndName(jid, name);
			}
		} else if (inviteToMUCRequest) {
			window_->setCanSupplyDescription(!inviteToMUCRequest->isImpromptu());
			window_->setJIDs(inviteToMUCRequest->getInvites());
			window_->setRoomJID(inviteToMUCRequest->getRoom());
		}
		return;
	}
}

void UserSearchController::handleFormRequested(const JID& service) {
	window_->setSearchError(false);
	window_->setServerSupportsSearch(true);

	//Abort a previous search if is active
	endDiscoWalker();
	delete discoWalker_;
	discoWalker_ = new DiscoServiceWalker(service, iqRouter_);
	discoWalker_->onServiceFound.connect(boost::bind(&UserSearchController::handleDiscoServiceFound, this, _1, _2));
	discoWalker_->onWalkComplete.connect(boost::bind(&UserSearchController::handleDiscoWalkFinished, this));
	discoWalker_->beginWalk();
}

void UserSearchController::endDiscoWalker() {
	if (discoWalker_) {
		discoWalker_->endWalk();
		discoWalker_->onServiceFound.disconnect(boost::bind(&UserSearchController::handleDiscoServiceFound, this, _1, _2));
		discoWalker_->onWalkComplete.disconnect(boost::bind(&UserSearchController::handleDiscoWalkFinished, this));
	}
}

void UserSearchController::handleDiscoServiceFound(const JID& jid, boost::shared_ptr<DiscoInfo> info) {
	//bool isUserDirectory = false;
	bool supports55 = false;
	foreach (DiscoInfo::Identity identity, info->getIdentities()) {
		if ((identity.getCategory() == "directory"
			&& identity.getType() == "user")) {
			//isUserDirectory = true;
		}
	}
	std::vector<std::string> features = info->getFeatures();
	supports55 = std::find(features.begin(), features.end(), DiscoInfo::JabberSearchFeature) != features.end();
	if (/*isUserDirectory && */supports55) { //FIXME: once M-Link correctly advertises directoryness.
		/* Abort further searches.*/
		endDiscoWalker();
		boost::shared_ptr<GenericRequest<SearchPayload> > searchRequest(new GenericRequest<SearchPayload>(IQ::Get, jid, boost::make_shared<SearchPayload>(), iqRouter_));
		searchRequest->onResponse.connect(boost::bind(&UserSearchController::handleFormResponse, this, _1, _2));
		searchRequest->send();
	}
}

void UserSearchController::handleFormResponse(boost::shared_ptr<SearchPayload> fields, ErrorPayload::ref error) {
	if (error || !fields) {
		window_->setServerSupportsSearch(false);
		return;
	}
	window_->setSearchFields(fields);
}

void UserSearchController::handleSearch(boost::shared_ptr<SearchPayload> fields, const JID& jid) {
	addToSavedDirectories(jid);
	boost::shared_ptr<GenericRequest<SearchPayload> > searchRequest(new GenericRequest<SearchPayload>(IQ::Set, jid, fields, iqRouter_));
	searchRequest->onResponse.connect(boost::bind(&UserSearchController::handleSearchResponse, this, _1, _2));
	searchRequest->send();
}

void UserSearchController::handleSearchResponse(boost::shared_ptr<SearchPayload> resultsPayload, ErrorPayload::ref error) {
	if (error || !resultsPayload) {
		window_->setSearchError(true);
		return;
	}

	std::vector<UserSearchResult> results;

	if (resultsPayload->getForm()) {
		window_->setResultsForm(resultsPayload->getForm());
	} else {
		foreach (SearchPayload::Item item, resultsPayload->getItems()) {
			JID jid(item.jid);
			std::map<std::string, std::string> fields;
			fields["first"] = item.first;
			fields["last"] = item.last;
			fields["nick"] = item.nick;
			fields["email"] = item.email;
			UserSearchResult result(jid, fields);
			results.push_back(result);
		}
		window_->setResults(results);
	}
}

void UserSearchController::handleNameSuggestionRequest(const JID &jid) {
	suggestionsJID_= jid;
	VCard::ref vcard = vcardManager_->getVCardAndRequestWhenNeeded(jid);
	if (vcard) {
		handleVCardChanged(jid, vcard);
	}
}

void UserSearchController::handleJIDEditingFinished(const JID& jid) {
	if (jid.isValid()) {
		if (rosterController_->getItem(jid)) {
			window_->setWarning(QT_TRANSLATE_NOOP("", "This contact is already on your contact list."));
		} else {
			window_->setWarning(boost::optional<std::string>());
		}
	}
	else {
		window_->setWarning(QT_TRANSLATE_NOOP("", "The address you have entered is invalid."));
	}
}

void UserSearchController::handleContactSuggestionsRequested(std::string text) {
	const std::vector<JID> existingJIDs = window_->getJIDs();
	std::vector<Contact::ref> suggestions = contactSuggester_->getSuggestions(text, false);
	/* do not suggest contacts that have already been added to the chat list */
	std::vector<Contact::ref>::iterator i = suggestions.begin();
	while (i != suggestions.end()) {
		bool found = false;
		foreach (const JID& jid, existingJIDs) {
			if ((*i)->jid == jid) {
				found = true;
				break;
			}
		}

		// remove contact suggestions which are already on the contact list in add-contact-mode
		if (type_ == AddContact) {
			if (!found && !!rosterController_->getItem((*i)->jid)) {
				found = true;
			}
		}

		if (found) {
			i = suggestions.erase(i);
		} else {
			i++;
		}
	}
	window_->setContactSuggestions(suggestions);
}

void UserSearchController::handleVCardChanged(const JID& jid, VCard::ref vcard) {
	if (jid == suggestionsJID_) {
		window_->setNameSuggestions(ContactEditController::nameSuggestionsFromVCard(vcard));
		suggestionsJID_ = JID();
	}
	handleJIDUpdateRequested(std::vector<JID>(1, jid));
}

void UserSearchController::handleAvatarChanged(const JID& jid) {
	handleJIDUpdateRequested(std::vector<JID>(1, jid));
}

void UserSearchController::handlePresenceChanged(Presence::ref presence) {
	handleJIDUpdateRequested(std::vector<JID>(1, presence->getFrom().toBare()));
}

void UserSearchController::handleJIDUpdateRequested(const std::vector<JID>& jids) {
	if (window_) {
		std::vector<Contact::ref> updates;
		foreach(const JID& jid, jids) {
			updates.push_back(convertJIDtoContact(jid));
		}
		window_->updateContacts(updates);
	}
}

void UserSearchController::handleJIDAddRequested(const std::vector<JID>& jids) {
	std::vector<Contact::ref> contacts;
	foreach(const JID& jid, jids) {
		contacts.push_back(convertJIDtoContact(jid));
	}
	window_->addContacts(contacts);
}

Contact::ref UserSearchController::convertJIDtoContact(const JID& jid) {
	Contact::ref contact = boost::make_shared<Contact>();
	contact->jid = jid;

	// name lookup
	boost::optional<XMPPRosterItem> rosterItem = rosterController_->getItem(jid);
	if (rosterItem && !rosterItem->getName().empty()) {
		contact->name = rosterItem->getName();
	} else {
		VCard::ref vcard = vcardManager_->getVCard(jid);
		if (vcard && !vcard->getFullName().empty()) {
			contact->name = vcard->getFullName();
		} else {
			contact->name = jid.toString();
		}
	}

	// presence lookup
	Presence::ref presence = presenceOracle_->getHighestPriorityPresence(jid);
	if (presence) {
		contact->statusType = presence->getShow();
	} else {
		contact->statusType = StatusShow::None;
	}

	// avatar lookup
	contact->avatarPath = avatarManager_->getAvatarPath(jid);
	return contact;
}

void UserSearchController::handleDiscoWalkFinished() {
	window_->setServerSupportsSearch(false);
	endDiscoWalker();
}

void UserSearchController::initializeUserWindow() {
	if (!window_) {
		UserSearchWindow::Type windowType = UserSearchWindow::AddContact;
		switch(type_) {
			case AddContact:
				windowType = UserSearchWindow::AddContact;
				break;
			case StartChat:
				windowType = UserSearchWindow::ChatToContact;
				break;
			case InviteToChat:
				windowType = UserSearchWindow::InviteToChat;
				break;
		}

		window_ = factory_->createUserSearchWindow(windowType, uiEventStream_, rosterController_->getGroups());
		if (!window_) {
			// UI Doesn't support user search
			return;
		}
		window_->onNameSuggestionRequested.connect(boost::bind(&UserSearchController::handleNameSuggestionRequest, this, _1));
		window_->onFormRequested.connect(boost::bind(&UserSearchController::handleFormRequested, this, _1));
		window_->onSearchRequested.connect(boost::bind(&UserSearchController::handleSearch, this, _1, _2));
		window_->onContactSuggestionsRequested.connect(boost::bind(&UserSearchController::handleContactSuggestionsRequested, this, _1));
		window_->onJIDUpdateRequested.connect(boost::bind(&UserSearchController::handleJIDUpdateRequested, this, _1));
		window_->onJIDAddRequested.connect(boost::bind(&UserSearchController::handleJIDAddRequested, this, _1));
		window_->onJIDEditFieldChanged.connect(boost::bind(&UserSearchController::handleJIDEditingFinished, this, _1));
		window_->setSelectedService(JID(jid_.getDomain()));
		window_->clear();
	}
}

void UserSearchController::loadSavedDirectories() {
	savedDirectories_.clear();
	foreach (std::string stringItem, String::split(settings_->getStringSetting(SEARCHED_DIRECTORIES), '\n')) {
		if(!stringItem.empty()) {
			savedDirectories_.push_back(JID(stringItem));
		}
	}
}

void UserSearchController::addToSavedDirectories(const JID& jid) {
	if (!jid.isValid()) {
		return;
	}

	savedDirectories_.erase(std::remove(savedDirectories_.begin(), savedDirectories_.end(), jid), savedDirectories_.end());
	savedDirectories_.insert(savedDirectories_.begin(), jid);

	std::string collapsed;
	int i = 0;
	foreach (JID jidItem, savedDirectories_) {
		if (i >= 15) {
			break;
		}
		if (!collapsed.empty()) {
			collapsed += "\n";
		}
		collapsed += jidItem.toString();
		++i;
	}
	settings_->storeString(SEARCHED_DIRECTORIES, collapsed);
	window_->addSavedServices(savedDirectories_);
}

}