/*

Facebook plugin for Miranda Instant Messenger
_____________________________________________

Copyright © 2009-11 Michal Zelinka, 2011-17 Robert Pösel, 2017-19 Miranda NG team

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "stdafx.h"

LRESULT CALLBACK PopupDlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

void parseUser(const JSONNode &it, facebook_user *fbu)
{
	fbu->user_id = it.name();

	std::string id = it["id"].as_string(); // same as element's name, but doesn't exists for "page" type
	std::string alternateName = it["alternateName"].as_string(); // nickname
	std::string name = it["name"].as_string();
	std::string thumbSrc = it["thumbSrc"].as_string();
	std::string vanity = it["vanity"].as_string(); // username
	std::string type = it["type"].as_string(); // "friend", "page", "user" (friend with disabled account or not friend)
	bool isFriend = it["is_friend"].as_bool(); // e.g. "True" or "False" for type="friend" (I don't know why), "False" for type="user", doesn't exist for type="page"
	int gender = it["gender"].as_int();
	// bool isMessengerContact = it["is_nonfriend_messenger_contact"].as_bool(); // "True" or "False", but we don't care as "is_friend" and "type" are enough for us

	//const JSONNode &uri = it["uri"); // profile url	

	if (type == "user" && (id.empty() || id == "0")) {
		// this user has deleted account or is just unavailable for us (e.g., ignore list) -> don't read dummy name and avatar and rather ignore that completely
		return;
	}

	if (type == "friend" && isFriend)
		fbu->type = CONTACT_FRIEND;
	else if (type == "user" || (type == "friend" && !isFriend))
		fbu->type = CONTACT_NONE;
	else if (type == "page")
		fbu->type = CONTACT_PAGE;

	if (!name.empty())
		fbu->real_name = utils::text::slashu_to_utf8(name);
	if (!thumbSrc.empty())
		fbu->image_url = utils::text::slashu_to_utf8(thumbSrc);
	if (!vanity.empty())
		fbu->username = utils::text::slashu_to_utf8(vanity);
	if (!alternateName.empty())
		fbu->nick = alternateName;

	if (gender) {
		switch (gender) {
		case 1: // female
			fbu->gender = 70;
			break;
		case 2: // male
			fbu->gender = 77;
			break;
			// case 7: // not available female?
			// case 11: // page
		}
	}
}

void FacebookProto::ParseMessageType(facebook_message &message, const JSONNode &log_type_, const JSONNode &log_body_, const JSONNode &log_data_)
{
	if (!log_type_ || !log_body_ || !log_data_)
		return;

	std::string logType = log_type_.as_string();

	if (logType == "log:phone-call") {
		message.type = PHONE_CALL;
	}
	else if (logType == "log:video-call") {
		message.type = VIDEO_CALL;
	}
	else if (logType == "log:generic-admin-text") {
		message.type = ADMIN_TEXT;
	}
	else if (logType == "log:subscribe") {
		message.type = SUBSCRIBE;

		const JSONNode &fbids_ = log_data_["added_participants"];
		for (auto &it2 : fbids_) {
			std::string id = it2.as_string().substr(5); // strip "fbid:" prefix
			if (!message.data.empty())
				message.data += ";";
			message.data += id;
		}
	}
	else if (logType == "log:unsubscribe") {
		message.type = UNSUBSCRIBE;

		const JSONNode &client_id = log_data_["client_message_id"];
		if (client_id)
			message.message_id = client_id.as_string();

		const JSONNode &fbids_ = log_data_["removed_participants"];
		for (auto &it2 : fbids_) {
			std::string id = it2.as_string().substr(5); // strip "fbid:" prefix
			if (!message.data.empty())
				message.data += ";";
			message.data += id;
		}
	}
	else if (logType == "log:thread-name") {
		message.type = THREAD_NAME;
		message.data = log_data_["name"].as_string();
	}
	else if (logType == "log:thread-image") {
		message.type = THREAD_IMAGE;
	}
	else {
		debugLogA("!!! Unknown log type - %s", logType.c_str());
	}
}

int FacebookProto::ParseChatParticipants(std::string *data, std::map<std::string, chatroom_participant>* participants)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &profiles = root["payload"].at("profiles");
	if (!profiles)
		return EXIT_FAILURE;

	for (auto &it : profiles) {
		std::string userId = it.name();
		std::string userName = it["name"].as_string();
		std::string type = it["type"].as_string();

		if (userId.empty() || userName.empty())
			continue;

		auto participant = participants->find(userId);
		if (participant != participants->end()) {
			chatroom_participant &user = participant->second;
			user.nick = userName;

			if (type == "friend")
				user.role = ROLE_FRIEND;
			else if (type == "user")
				user.role = ROLE_NONE;
			else if (type == "page") {
				user.role = ROLE_NONE;
				// Use prefix for "page" users
				user.nick = m_pagePrefix + " " + userName;
			}

			user.loaded = true;
		}
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseFriends(std::string *data, std::map< std::string, facebook_user* >* friends, bool loadAllContacts)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &payload = root["payload"];
	if (!payload)
		return EXIT_FAILURE;

	for (auto &it : payload) {
		facebook_user *fbu = new facebook_user();
		parseUser(it, fbu);

		// Facebook now sends also other types of contacts, which we do not want here
		if (!loadAllContacts && fbu->type != CONTACT_FRIEND) {
			delete fbu;
			continue;
		}

		friends->insert(std::make_pair(fbu->user_id, fbu));
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseNotifications(std::string *data, std::map< std::string, facebook_notification* > *notifications)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &list = root["payload"].at("nodes");
	if (!list)
		return EXIT_FAILURE;

	// Create notifications chatroom (if it doesn't exists), because we will be writing to it new notifications here
	PrepareNotificationsChatRoom();

	for (auto &it : list) {
		const JSONNode &id_ = it["alert_id"];
		const JSONNode &state_ = it["seen_state"];
		const JSONNode &time_ = it["timestamp"]["time"];
		const JSONNode &text_ = it["title"]["text"];
		const JSONNode &url_ = it["url"];
		const JSONNode &icon_ = it["icon"]["uri"];

		// Ignore empty and old notifications
		if (!text_ || !state_ || state_.as_string() == "SEEN_AND_READ" || !time_)
			continue;

		facebook_notification *notification = new facebook_notification();

		notification->id = id_.as_string();

		// Fix notification ID
		std::string::size_type pos = notification->id.find(":");
		if (pos != std::string::npos)
			notification->id = notification->id.substr(pos + 1);

		notification->link = url_.as_string();
		notification->text = utils::text::html_entities_decode(utils::text::slashu_to_utf8(text_.as_string()));
		notification->time = utils::time::from_string(time_.as_string());
		notification->icon = ParseIcon(icon_.as_string());

		// Write notification to chatroom
		UpdateNotificationsChatRoom(notification);

		// If it's unseen, remember it, otherwise forget it
		if (notifications->find(notification->id) == notifications->end())
			notifications->insert(std::make_pair(notification->id, notification));
		else
			delete notification;
	}

	return EXIT_SUCCESS;
}

bool FacebookProto::IgnoreDuplicates(const std::string &mid)
{
	mir_cslock s(facy.send_message_lock_);

	std::map<std::string, int>::iterator it = facy.messages_ignore.find(mid);
	if (it != facy.messages_ignore.end()) {
		debugLogA("??? Ignoring duplicit/sent message ID: %s", mid.c_str());
		it->second++; // increase counter (for deleting it later)
		return true;
	}

	// remember this id to ignore duplicits
	facy.messages_ignore.insert(std::make_pair(mid, 1));
	return false;
}

std::string absolutizeUrl(std::string &url)
{
	if (url.find("/") == 0) {
		url = HTTP_PROTO_SECURE FACEBOOK_SERVER_REGULAR + url;
	}
	return url;
}

void FacebookProto::ParseAttachments(std::string &message_text, const JSONNode &delta_, std::string other_user_fbid, bool legacy)
{
	std::string attachments_text;
	std::wstring newText;
	bool hasAttachement = false;

	// define parsing methods by type
	// sticker
	auto parseSticker = [this, &newText, &attachments_text, other_user_fbid](JSONNode sticker_) {
		newText = TranslateT("a sticker");
		attachments_text += "\n";

		std::string link = sticker_["url"].as_string();
		if (!link.empty())
			attachments_text += absolutizeUrl(link) + "\n";

		std::string label = sticker_["label"].as_string();
		if (!label.empty())
			attachments_text += label + "\n";

		const JSONNode &stickerId_ = sticker_["id"];
		if (stickerId_) {
			// Stickers as smileys
			if (getByte(FACEBOOK_KEY_CUSTOM_SMILEYS, DEFAULT_CUSTOM_SMILEYS) && !facy.loading_history) {
				// FIXME: rewrite smileyadd to use custom smileys per protocol and not per contact and then remove this ugliness
				if (!other_user_fbid.empty()) {
					std::string sticker = "[[sticker:" + stickerId_.as_string() + "]]";
					StickerAsSmiley(sticker, link, ContactIDToHContact(other_user_fbid));
				}
			}
		}
	};
	// blob attachment
	auto parseBlobAttachment = [this, &newText, &attachments_text](JSONNode blob_) {
		std::string type = blob_["__typename"].as_string();
		if (type == "MessageAnimatedImage") { // a GIF
			newText = TranslateT("a GIF");

			std::string link = blob_["animated_image"]["uri"].as_string();
			if (!link.empty())
				attachments_text += "\n" + absolutizeUrl(link) + "\n";
		}
		else if (type == "MessageVideo" || type == "MessageAudio") { // a video or audio attachement
			std::string filename = blob_["filename"].as_string();
			// playable_duration_in_ms=;video_type=FILE_ATTACHMENT

			std::string link = blob_["playable_url"].as_string();
			if (!link.empty())
				attachments_text += "\n" + (!filename.empty() ? "<" + filename + "> " : "") + absolutizeUrl(link) + "\n";
		}
		else if (type == "MessageImage") { // an image
			std::string filename = blob_["filename"].as_string();

			std::string link = blob_["large_preview"]["uri"].as_string();
			if (!link.empty())
				attachments_text += "\n" + (!filename.empty() ? "<" + filename + "> " : "") + absolutizeUrl(link) + "\n";
		}
		else { // other
			// newText = (attachments_.size() > 1) ? TranslateT("files") : TranslateT("a file"); // pull
			std::string filename = blob_["filename"].as_string();
			/*std::string filesize = attach_["fileSize"].as_string(); // pull
			if (!filesize.empty())
			filename += ", " + filesize + " bytes";*/

			std::string link = blob_["url"].as_string();
			if (!link.empty())
				attachments_text += "\n" + (!filename.empty() ? "<" + filename + "> " : "") + absolutizeUrl(link) + "\n";
		}
	};
	// link
	auto parseLink = [this, &newText, &attachments_text](JSONNode story_) {
		newText = TranslateT("a link");

		std::string title = story_["title_with_entities"]["text"].as_string();
		std::string description = story_["description"]["text"].as_string();
		std::string link = story_["url"].as_string();

		// shorten long descriptions
		description = utils::text::truncate_utf8(description, MAX_LINK_DESCRIPTION_LEN);

		if (link.find("//www." FACEBOOK_SERVER_DOMAIN "/l.php") != std::string::npos || link.find("//l." FACEBOOK_SERVER_DOMAIN) != std::string::npos) {
			// de-facebook this link
			link = utils::url::decode(utils::text::source_get_value2(&link, "l.php?u=", "&", true));
		}

		if (!link.empty()) {
			attachments_text += "\n";
			if (!title.empty())
				attachments_text += title + "\n";
			if (!description.empty())
				attachments_text += description + "\n";
			attachments_text += absolutizeUrl(link) + "\n";
		}
	};

	// do parsing
	if (legacy) {
		// api graph.. request
		const JSONNode sticker_ = delta_["sticker"];
		if (!sticker_.empty()) {
			hasAttachement = true;
			parseSticker(sticker_);
		}
		const JSONNode blobs_ = delta_["blob_attachments"];
		if (!blobs_.empty()) {
			hasAttachement = true;
			newText = (blobs_.size() > 1) ? TranslateT("files") : TranslateT("a file");
			for (auto &blob_ : blobs_) {
				parseBlobAttachment(blob_);
			}
		}
		const JSONNode story_ = delta_["extensible_attachment"]["story_attachment"];
		if (!story_.empty()) {
			hasAttachement = true;
			std::string type = story_["target"]["__typename"].as_string();
			if (type == "ExternalUrl" || type == "Story" || type == "QuickInvite") {
				parseLink(story_);
			} 
			else debugLogA("json::parseAttachments (%s) - Unknown extensible attachment type %s", legacy ? "legacy" : "not legacy", type.c_str());
		}
		// else debugLogA("json::parseAttachments (%s) - Unknown attachment type", legacy ? "legacy" : "not legacy");
	}
	else {
		// pull request, i.e. from chat message
		const JSONNode &attachments_ = delta_["attachments"];
		if (!attachments_ || attachments_.empty())
			;
		else {
			hasAttachement = true;
			for (auto &itAttachment : attachments_) {
				const JSONNode &attach_ = itAttachment["mercury"];
				if (const JSONNode sticker_ = attach_["sticker_attachment"]) {
					parseSticker(sticker_);
				}
				else if (const JSONNode blob_ = attach_["blob_attachment"]) {
					parseBlobAttachment(blob_);
				}
				else if (const JSONNode story_ = attach_["extensible_attachment"]["story_attachment"]) {
					std::string type = story_["target"]["__typename"].as_string();
					if (type == "ExternalUrl" || type == "Story" || type == "QuickInvite") {
						parseLink(story_);
					}
					else debugLogA("json::parseAttachments (%s) - Unknown extensible attachment type %s", legacy ? "legacy" : "not legacy", type.c_str());
				}
				else debugLogA("json::parseAttachments (%s) - Unknown attachment type", legacy ? "legacy" : "not legacy");
			}
		}
	}

	if (hasAttachement) {
		// TODO: have this as extra event, not replace or append message content
		if (!message_text.empty())
			message_text += "\n\n";

		if (!attachments_text.empty()) {
			wchar_t title[200];
			mir_snwprintf(title, TranslateT("User sent %s:"), newText.c_str());

			message_text += T2Utf(title);
			message_text += attachments_text;
		}
		else {
			message_text += T2Utf(TranslateT("User sent an unsupported attachment. Open your browser to see it."));
			debugLogA("json::parseAttachments (%s) - Unsupported attachment:\n%s", legacy ? "legacy" : "not legacy", /*attachments_*/delta_.as_string().c_str());
		}
	}
}

bool FacebookProto::ParseMessageMetadata(facebook_message &message, const JSONNode &meta_)
{
	if (!meta_)
		return false;

	const JSONNode &actorFbId_ = meta_["actorFbId"]; // who did the action
	const JSONNode &adminText_ = meta_["adminText"]; // description of the event (only for special events, not for user messages)
	const JSONNode &messageId_ = meta_["messageId"];
	const JSONNode &otherUserFbId_ = meta_["threadKey"]["otherUserFbId"]; // for whom the event is (only for single conversations)
	const JSONNode &threadFbId_ = meta_["threadKey"]["threadFbId"]; // thread of the event (only for multi chat conversations)
	const JSONNode &timestamp_ = meta_["timestamp"];

	if (!actorFbId_ || !messageId_ || !timestamp_)
		return false;

	std::string actorFbId = (actorFbId_ ? actorFbId_.as_string() : "");
	std::string otherUserFbId = (otherUserFbId_ ? otherUserFbId_.as_string() : "");
	std::string threadFbId = (!otherUserFbId_ && threadFbId_ ? "id." + threadFbId_.as_string() : ""); // NOTE: we must add "id." prefix as this is threadFbId and we want threadId (but only for multi chats)

	message.isChat = otherUserFbId.empty();
	message.isIncoming = (actorFbId_.as_string() != facy.self_.user_id);
	message.isUnread = message.isIncoming;
	message.message_text = (adminText_ ? adminText_.as_string() : "");
	message.time = utils::time::from_string(timestamp_.as_string());
	message.user_id = message.isChat ? actorFbId : otherUserFbId;
	message.message_id = messageId_.as_string();
	message.thread_id = threadFbId;
	return true;
}

bool FacebookProto::ProcessSpecialMessage(std::vector<facebook_message> &messages, const JSONNode &meta_, MessageType messageType, const std::string &messageData)
{
	facebook_message message;
	message.type = messageType;
	message.data = messageData;

	// Parse message metadata
	if (!ParseMessageMetadata(message, meta_)) {
		debugLogA("json::ProcessSpecialMessage - given empty messageMetadata");
		return false;
	}

	// Ignore duplicits or messages sent from miranda
	if (IgnoreDuplicates(message.message_id)) {
		return false;
	}

	messages.push_back(message);
	return true;
}

const char* FacebookProto::ParseIcon(const std::string &url)
{
	if (url.empty())
		return nullptr;
	
	auto itr = reactions.find(url);
	if (itr == reactions.end()) {
		UCHAR hash[MIR_SHA256_HASH_SIZE];
		mir_sha256_hash(url.c_str(), url.length(), hash);

		wchar_t wszHash[MIR_SHA256_HASH_SIZE * 2 + 10];
		bin2hexW(hash, sizeof(hash), wszHash);

		wchar_t wszFileName[MAX_PATH];
		mir_snwprintf(wszFileName, L"%s\\%s", VARSW(L"%miranda_avatarcache%"), m_tszUserName);
		if (_waccess(wszFileName, 0))
			CreateDirectoryTreeW(wszFileName);

		wcscat_s(wszFileName, L"\\");
		wcscat_s(wszFileName, wszHash);
		wcscat_s(wszFileName, L".ico");
		if (_waccess(wszFileName, 0)) {
			NETLIBHTTPREQUEST req = { sizeof(req) };
			req.requestType = REQUEST_GET;
			req.szUrl = (char*)url.c_str();
			req.flags = NLHRF_NODUMPHEADERS;

			NETLIBHTTPREQUEST *reply = Netlib_HttpTransaction(facy.handle_, &req);
			if (reply != nullptr && reply->resultCode == HTTP_CODE_OK) {
				HBITMAP hBmp = Image_LoadFromMem(reply->pData, reply->dataLength, FIF_UNKNOWN);
				if (hBmp != nullptr) {
					IMGSRVC_INFO info = { sizeof(info) };
					info.pwszName = wszFileName;
					info.fif = FIF_ICO;
					info.dwMask = IMGI_HBITMAP;
					info.hbm = hBmp;
					Image_Save(&info);
				}
			}
		}

		HICON hIcon;
		if (ExtractIconEx(wszFileName, 0, nullptr, &hIcon, 1) == 1) {
			int idx = (int)reactions.size() + 1;
			wchar_t desc[256];
			char name[256];
			mir_snwprintf(desc, L"%s/%s%d", m_tszUserName, TranslateT("Reaction"), idx);
			mir_snprintf(name, "%s_%s%d", m_szModuleName, "Reaction", idx);

			POPUPCLASS ppc = { sizeof(ppc) };
			ppc.flags = PCF_UNICODE;
			ppc.PluginWindowProc = PopupDlgProc;
			ppc.lParam = APF_RETURN_HWND;
			ppc.pszDescription.w = desc;
			ppc.pszName = name;
			ppc.hIcon = hIcon;
			ppc.colorBack = RGB(59, 89, 152); // Facebook's blue
			ppc.colorText = RGB(255, 255, 255); // white
			ppc.iSeconds = 0;
			popupClasses.push_back(Popup_RegisterClass(&ppc));

			mir_cslock lck(csReactions);
			reactions.insert(std::make_pair(url, name));
		}

		itr = reactions.find(url);
	}

	return (itr == reactions.end()) ? nullptr : itr->second.c_str();
}

int FacebookProto::ParseMessages(std::string &pData, std::vector<facebook_message> &messages)
{
	// remove old received messages from map		
	for (auto it = facy.messages_ignore.begin(); it != facy.messages_ignore.end();) {
		if (it->second > FACEBOOK_IGNORE_COUNTER_LIMIT)
			it = facy.messages_ignore.erase(it);
		else {
			it->second++; // increase counter on each request
			++it;
		}
	}

	JSONNode root = JSONNode::parse(pData.substr(9).c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &ms = root["ms"];
	if (!ms)
		return EXIT_FAILURE;

	for (auto &it : ms) {
		const JSONNode &type = it["type"];
		if (!type)
			continue;

		std::string t = type.as_string();
		if (t == "delta") {
			// new messaging stuff

			const JSONNode &delta_ = it["delta"];
			if (!delta_)
				continue;

			const JSONNode &cls_ = delta_["class"];
			std::string cls = cls_.as_string();
			if (cls == "NewMessage") { // revised 5.3.2017		
				facebook_message message;

				// Parse message metadata				
				const JSONNode &meta_ = delta_["messageMetadata"];
				if (!ParseMessageMetadata(message, meta_)) {
					debugLogA("json::ParseMessages - No messageMetadata element");
					continue;
				}

				// Ignore duplicits or messages sent from miranda
				if (IgnoreDuplicates(message.message_id))
					continue;

				const JSONNode &body_ = delta_["body"];
				std::string messageText = body_.as_string();

				// Process attachements and stickers
				ParseAttachments(messageText, delta_, (message.isChat ? "" : message.user_id), false);

				message.message_text = utils::text::trim(messageText, true);
				messages.push_back(message);
			}
			else if (cls == "ReplaceMessage") { // revised 5.3.2017
				//const JSONNode &newMessage_ = delta_["newMessage"];
				// In newMessage object: "attachments", "body", "data"["meta_ranges"], "messageMetadata"["actorFbId", "messageId", "threadKey"["otherUserFbId", "threadFbId"], "timestamp"], "ttl"
				// ttl is usually "TTL_OFF"
				// meta_ranges is e.g. meta_ranges=[{"offset":11,"length":3,"type":1,"data":{"name":"timestamp","value":1488715200}}]
			}
			else if (cls == "ReadReceipt") {
				// user read message

				// when read
				const JSONNode &time_ = delta_["actionTimestampMs"];
				if (!time_)
					continue;

				time_t timestamp = utils::time::from_string(time_.as_string());

				// for multi chats (not available for single)
				const JSONNode &actor_ = delta_["actorFbId"]; // who read the message
				const JSONNode &thread_ = delta_["threadKey"]["threadFbId"]; // chat thread

				// for single chats (not available for multi)
				const JSONNode &reader_ = delta_["threadKey"]["otherUserFbId"]; // who read the message

				if (actor_ && thread_) {
					// multi chat

					// ignore if disabled
					if (!m_enableChat)
						continue;

					std::string readerId = actor_.as_string();
					std::string tid = "id." + thread_.as_string(); // NOTE: threadFbId means just numeric id of thread, without "id." prefix. We add it here to have it consistent with other methods (where threadId is used)

					MCONTACT hContact = ChatIDToHContact(tid);
					facy.insert_reader(hContact, timestamp, readerId);
				}
				else if (reader_) {
					// single chat
					std::string userId = reader_.as_string();

					MCONTACT hContact = ContactIDToHContact(userId);
					facy.insert_reader(hContact, timestamp);
				}
			}
			else if (cls == "MarkRead") { // revised 5.3.2017
				// Messages (thread) was marked as read on server
				//const JSONNode &other_user_id_ = delta_["threadKeys"]["otherUserFbId"]; // for whom the message is (only for single conversations)
				//const JSONNode &thread_fbid_ = delta_["threadKeys"]["threadFbId"]; // thread of the message (only for multi chat conversations)
				//const JSONNode &actionTimestamp_ = delta_["actionTimestamp"]; // timestamp; more recent than watermarkTimestamp
				//const JSONNode &watermarkTimestamp_ = delta_["watermarkTimestamp"]; // timestamp
			}
			else if (cls == "NoOp") { // revised 5.3.2017
				//const JSONNode &numNoOps_ = delta_["numNoOps"]; // number, usually 1 but I don't know what is it for
				continue;
			}
			else if (cls == "ForcedFetch") { // revised 5.3.2017
				// when something related to thread changes (e.g. change of nickname of other user, thread image, etc.)
			}
			else if (cls == "AdminTextMessage") { // revised 5.3.2017
				// various system messages - approving friendship, changing thread nickname, etc.
				const JSONNode &meta_ = delta_["messageMetadata"];
				MessageType messageType = ADMIN_TEXT;

				// TODO: Do something special with some delta types
				const JSONNode &type_ = delta_["type"];
				//const JSONNode &untyped_ = delta_["untypedData"];

				std::string deltaType = type_.as_string();
				if (deltaType == "confirm_friend_request") {
					//const JSONNode &connection_type_ = untyped_["connection_type"]; // e.g. "friend_request"
					//const JSONNode &friend_request_recipient_ = untyped_["friend_request_recipient"]; // userid
					//const JSONNode &friend_request_sender_ = untyped_["friend_request_sender"]; // userid
				}
				else if (deltaType == "change_thread_nickname") {
					//const JSONNode &nickname_ = untyped_["nickname"]; // new nickname
					//const JSONNode &participant_id_ = untyped_["participant_id"]; // user fbid of that participant
				}
				else if (deltaType == "change_thread_theme") {
					//const JSONNode &theme_color_ = untyped_["theme_color"]; // hexa format aarrggbb
				}
				else if (deltaType == "type=change_thread_icon") {
					//const JSONNode &thread_icon_ = untyped_["thread_icon"]; // emoji symbol
				}
				else {
					debugLogA("json::ParseMessages - Unknown AdminTextMessage type '%s'", deltaType.c_str());
				}

				if (!ProcessSpecialMessage(messages, meta_, messageType)) {
					// Message wasn't added - either it is duplicate or there was some error
					continue;
				}
			}
			else if (cls == "RTCEventLog") { // revised 5.3.2017
				// various voice/video calls events
				const JSONNode &meta_ = delta_["messageMetadata"];
				MessageType messageType = ADMIN_TEXT;

				// TODO: Do something special with some types
				//const JSONNode &duration_ = delta_["duration"]; // numeric, probably length of call, e.g. 0
				const JSONNode &eventType_ = delta_["eventType"]; // e.g. "VOICE_EVENT", "VIDEO_EVENT"

				std::string eventType = eventType_.as_string();
				if (eventType == "VOICE_EVENT")
					messageType = PHONE_CALL;
				else if (eventType == "VIDEO_EVENT")
					messageType = VIDEO_CALL;
				else
					debugLogA("json::ParseMessages - Unknown RTCEventLog type '%s'", eventType.c_str());

				if (!ProcessSpecialMessage(messages, meta_, messageType)) {
					// Message wasn't added - either it is duplicate or there was some error
					continue;
				}
			}
			else if (cls == "ThreadName") {
				// changed thread name (multi user chat)
				const JSONNode &meta_ = delta_["messageMetadata"];

				const JSONNode &name_ = delta_["name"]; // new name of the chat (could be empty)
				std::string data = (name_ ? name_.as_string() : "");

				ProcessSpecialMessage(messages, meta_, THREAD_NAME, data);
			}
			else if (cls == "ThreadMuteSettings") {
				//const JSONNode &expireTime_ = delta_["expireTime"]; // timestamp until which this thread will be muted; could be 0 = unmuted
				// _delta["threadKey"] contains "threadFbId" or "otherUserId" identifier
			}
			else if (cls == "ParticipantLeftGroupThread") {
				// user was removed from multi user chat
				const JSONNode &meta_ = delta_["messageMetadata"];

				const JSONNode &leftParticipantFbId_ = delta_["leftParticipantFbId"];
				std::string data = (leftParticipantFbId_ ? leftParticipantFbId_.as_string() : "");

				ProcessSpecialMessage(messages, meta_, UNSUBSCRIBE, data);
			}
			else if (cls == "ParticipantsAddedToGroupThread") {
				// user was added to multi user chat
				const JSONNode &meta_ = delta_["messageMetadata"];
				std::string data = "";

				const JSONNode &addedParticipants_ = delta_["addedParticipants"]; // array of added participants
				for (auto &it2 : addedParticipants_) {
					const JSONNode &userFbId_ = it2["userFbId"]; // userid

					// TODO: Take advantage of given fullName so we don't need to load it manually afterwards
					if (userFbId_) {
						if (!data.empty())
							data += ";";
						data += userFbId_.as_string();
					}
				}

				ProcessSpecialMessage(messages, meta_, SUBSCRIBE, data);
			}
			else {
				// DeliveryReceipt, MarkRead, ThreadDelete
				debugLogA("json::ParseMessages - Unknown delta class '%s'", cls.c_str());
			}
		}
		else if (t == "notification_json") {
			// event notification
			const JSONNode &nodes = it["nodes"];

			// Create notifications chatroom (if it doesn't exists), because we will be writing to it new notifications here
			PrepareNotificationsChatRoom();

			for (auto &itNodes : nodes) {
				const JSONNode &text_ = itNodes["unaggregatedTitle"]; // notifications one by one, not grouped
				if (!text_)
					continue;

				const JSONNode &text = text_["text"];
				const JSONNode &url = itNodes["url"];
				const JSONNode &alert_id = itNodes["alert_id"];
				const JSONNode &icon_ = itNodes["icon"]["uri"];

				const JSONNode &time_ = itNodes["timestamp"];
				if (!time_)
					continue;
				const JSONNode &time = time_["time"];
				if (!time || !text || !url || !alert_id)
					continue;

				time_t timestamp = utils::time::from_string(time.as_string());
				if (timestamp > facy.last_notification_time_) {
					// Only new notifications
					facy.last_notification_time_ = timestamp;

					facebook_notification *notification = new facebook_notification();
					notification->text = utils::text::slashu_to_utf8(text.as_string());
					notification->link = url.as_string();
					notification->id = alert_id.as_string();
					notification->time = timestamp;
					notification->icon = ParseIcon(icon_.as_string());

					// Fix notification ID
					std::string::size_type pos = notification->id.find(":");
					if (pos != std::string::npos)
						notification->id = notification->id.substr(pos + 1);

					// Write notification to chatroom
					UpdateNotificationsChatRoom(notification);

					// If it's unseen, remember it, otherwise forget it (here it will always be unseen)
					if (facy.notifications.find(notification->id) == facy.notifications.end() && !notification->seen)
						facy.notifications.insert(std::make_pair(notification->id, notification));
					else
						delete notification;
				}
			}
		}
		else if (t == "m_notification") {
			const JSONNode &data = it["data"];
			if (!data)
				continue;

			const JSONNode &html_ = data["body"]["__html"];
			const JSONNode &href_ = data["href"];
			const JSONNode &unread_ = data["unread"];
			if (!html_ || !href_ || !unread_ || unread_.as_int() == 0)
				continue;

			std::string alert_id = data["alert_id"].as_string();

			const JSONNode &type_ = data["type"];
			if (type_.as_string() == "friend_confirmed") {
				std::string text = utils::text::remove_html(utils::text::slashu_to_utf8(html_.as_string()));
				std::string url = href_.as_string();

				// Notify it, if user wants to be notified
				if (getByte(FACEBOOK_KEY_EVENT_FRIENDSHIP_ENABLE, DEFAULT_EVENT_FRIENDSHIP_ENABLE))
					NotifyEvent(m_tszUserName, ptrW(mir_utf8decodeW(text.c_str())), 0, EVENT_FRIENDSHIP, &url, alert_id.empty() ? nullptr : &alert_id);
			}
			else { // new comment, like or reaction
				PrepareNotificationsChatRoom();

				// Fix notification ID
				std::string::size_type pos = alert_id.find(":");
				if (pos != std::string::npos)
					alert_id = alert_id.substr(pos + 1);

				facebook_notification *notification = new facebook_notification();
				notification->text = utils::text::remove_html(utils::text::html_entities_decode(html_.as_string()));
				notification->link = href_.as_string();
				notification->id = alert_id;
				notification->time = utils::time::from_string(data["time"].as_string());

				const JSONNode &app_icon_ = data["app_icon"]["__html"];
				if (app_icon_) {
					std::string url = app_icon_.as_string();
					notification->icon = ParseIcon(utils::text::source_get_value(&url, 3, "img class=\"img\"", "src=\"", "\""));
				}

				// Write notification to chatroom
				UpdateNotificationsChatRoom(notification);

				facy.notifications.insert(std::make_pair(notification->id, notification));
			}
		}
		else if (t == "jewel_requests_add") {
			// New friendship request, load them all with real names (because there is only user_id in "from" field)
			ForkThread(&FacebookProto::ProcessFriendRequests, nullptr);
		}
		else if (t == "typ") { // revised 5.3.2017
			// chat typing notification
			const JSONNode &from_ = it["from"]; // user fbid
			const JSONNode &to_ = it["to"]; // user fbid (should be our own, but could be from our page too)
			//const JSONNode &realtime_viewer_fbid_ = it["realtime_viewer_fbid"]; // our user fbid
			//const JSONNode &from_mobile_ = it["from_mobile"]; // boolean // TODO: perhaps we should update user client based on this?
			const JSONNode &st_ = it["st"]; // typing status - 1 = started typing, 0 = stopped typing

			// Ignore wrong (without "from") typing notifications or that are not meant for us (but e.g. for our page)
			if (!from_ || to_.as_string() != facy.self_.user_id)
				continue;

			facebook_user fbu;
			fbu.user_id = from_.as_string();
			fbu.type = CONTACT_FRIEND; // only friends are able to send typing notifications
			MCONTACT hContact = AddToContactList(&fbu);

			if (st_.as_int() == 1)
				StartTyping(hContact);
			else
				StopTyping(hContact);
		}
		else if (t == "ttyp") {
			// multi chat typing notification
			if (!m_enableChat)
				continue;

			const JSONNode &from_ = it["from"];
			const JSONNode &thread_ = it["thread"];
			const JSONNode &st_ = it["st"];
			if (!from_ || !thread_ || !st_)
				continue;

			std::string tid = thread_.as_string();
			std::string from_id = from_.as_string();

			auto itRoom = facy.chat_rooms.find(thread_.as_string());
			if (itRoom != facy.chat_rooms.end()) {
				facebook_chatroom *chatroom = itRoom->second;
				std::map<std::string, chatroom_participant> participants = chatroom->participants;

				auto participant = participants.find(from_id);
				if (participant == participants.end()) {
					// TODO: load name of this participant
					chatroom_participant new_participant;
					new_participant.user_id = from_id;
					new_participant.nick = from_id;
					AddChatContact(tid.c_str(), new_participant, true);
				}

				participant = participants.find(from_id);
				if (participant != participants.end()) {
					MCONTACT hChatContact = ChatIDToHContact(tid);
					ptrW name(mir_utf8decodeW(participant->second.nick.c_str()));

					if (st_.as_int() == 1)
						Srmm_SetStatusText(hChatContact, CMStringW(FORMAT, TranslateT("%s is typing a message..."), name));
					else
						Srmm_SetStatusText(hChatContact, nullptr);

					// TODO: support proper MS_PROTO_CONTACTISTYPING service for chatrooms (when it will be implemented)
				}
			}
		}
		else if (t == "privacy_changed") {
			// settings changed

			const JSONNode &event_type = it["event"];
			const JSONNode &event_data = it["data"];
			if (!event_type || !event_data)
				continue;

			std::string et = event_type.as_string();
			if (et == "visibility_update") {
				// change of chat status
				const JSONNode &visibility = event_data["visibility"];

				bool isVisible = visibility && visibility.as_bool();
				debugLogA("    Requested chat switch to %s", isVisible ? "Online" : "Offline");

				// If actual status is not what server says, change it (handle also local away status, which means online)
				if (isVisible != (m_iStatus != ID_STATUS_INVISIBLE))
					SetStatus(isVisible ? ID_STATUS_ONLINE : ID_STATUS_INVISIBLE);
			}
		}
		else if (t == "chatproxy-presence") {
			const JSONNode &buddyList = it["buddyList"];
			if (!buddyList)
				continue;

			time_t offlineThreshold = time(0) - 15 * 60; // contacts last active more than 15 minutes will be marked offline

			for (auto &itNodes : buddyList) {
				// Facebook now sends info also about some nonfriends, so we just ignore status change of contacts we don't have in list
				MCONTACT hContact = ContactIDToHContact(itNodes.name());
				if (!hContact)
					continue;

				// TODO: Check for friends existence/inexistence? Here we should get all friends (but we're already doing friendslist request, so we should have fresh data already)

				const JSONNode &p_ = itNodes["p"]; // possible values: 0, 2 (something more?) (might not be present)
				const JSONNode &lat_ = itNodes["lat"]; // timestamp of last activity (could be 0) (is always present)
				const JSONNode &vc_ = itNodes["vc"]; // possible values: 0, 8, 10 (something more?) (might not be present)

				int status = ID_STATUS_DND; // DND to easily spot some problem, as we expect it will always be p==0 or p==2 below

				// Probably means presence: 0 = away, 2 = online, when not present then that probably means don't change that status
				if (p_) {
					int p = p_.as_int();

					if (p == 0)
						status = ID_STATUS_AWAY;
					else if (p == 2)
						status = ID_STATUS_ONLINE;

					setWord(hContact, "Status", status);
				}

				// Last active time
				if (lat_) {
					time_t last_active = utils::time::from_string(lat_.as_string());

					if (last_active > 0)
						setDword(hContact, "LastActiveTS", last_active);
					else
						delSetting(hContact, "LastActiveTS");

					// Set users inactive for too long as offline
					if (last_active > 0 && last_active < offlineThreshold)
						setWord(hContact, "Status", ID_STATUS_OFFLINE);
				}

				// Probably means client: guess 0 = web, 8 = messenger, 10 = something else?
				if (vc_) {
					wchar_t *client;
					switch (vc_.as_int()) {
						case 0: client = FACEBOOK_CLIENT_WEB; break;
						case 8: client = FACEBOOK_CLIENT_MESSENGER; break;
						case 10: client = FACEBOOK_CLIENT_MOBILE; break;
						default: client = FACEBOOK_CLIENT_OTHER; break;
					}
					setWString(hContact, "MirVer", client);
				}
			}
		}
		else if (t == "buddylist_overlay") {
			// TODO: This is now supported also via /ajax/mercury/tabs_presence.php request (probably)
			// additional info about user status (status, used client)
			const JSONNode &overlay_ = it["overlay"];
			if (!overlay_)
				continue;

			time_t offlineThreshold = time(0) - 15 * 60; // contacts last active more than 15 minutes will be marked offline

			for (auto &itNodes : overlay_) {
				MCONTACT hContact = ContactIDToHContact(itNodes.name());
				if (!hContact) {
					// Facebook now sends info also about some nonfriends, so we just ignore status change of contacts we don't have in list
					continue;
				}

				/* ptrW client(getWStringA(fbu->handle, "MirVer"));
				if (!client || mir_wstrcmp(client, fbu->getMirVer()))
					setWString(fbu->handle, "MirVer", fbu->getMirVer());
				*/

				const JSONNode &a_ = itNodes["a"]; // possible values: 0, 2 (something more?)
				const JSONNode &la_ = itNodes["la"]; // timestamp of last activity (could be 0)
				const JSONNode &s_ = itNodes["s"]; // possible values: push (something more?)
				const JSONNode &vc_ = itNodes["vc"]; // possible values: 0, 8, 10 (something more?)

				// Friller account has also these:
				// const JSONNode &ol_ = itNodes["ol"]; // possible values: -1 (when goes to offline), 0 (when goes back online) (something more?)
				// const JSONNode &p_ = itNodes["p"]; // class with fbAppStatus, messengerStatus, otherStatus, status, webStatus

				int status = ID_STATUS_FREECHAT; // FREECHAT to easily spot some problem, as we expect it will always be p==0 or p==2 below

				if (a_) {
					int a = a_.as_int();

					if (a == 0)
						status = ID_STATUS_OFFLINE;
					else if (a == 2)
						status = ID_STATUS_ONLINE;
				}
				else {
					status = ID_STATUS_OFFLINE;
				}

				if (la_ /*&& status != ID_STATUS_ONLINE*/) {
					time_t last_active = utils::time::from_string(la_.as_string());

					// Set users inactive for too long as offline
					if (last_active > 0 && last_active < offlineThreshold)
						status = ID_STATUS_OFFLINE;
				}
				else delSetting(hContact, "IdleTS");

				setWord(hContact, "Status", status);

				if (s_) {
					// what to do with this?
				}
				// Probably means client: guess 0 = web, 8 = messenger, 10 = something else?
				if (vc_) {
					wchar_t *client = FACEBOOK_CLIENT_WEB;

					/*if (vc == 0) {
						// means active some time ago? (on messenger or also on web)
						client = FACEBOOK_CLIENT_WEB;
					}
					else if (vc == 8) {
						client = FACEBOOK_CLIENT_MESSENGER; // I was online on Miranda, but when looked at myself at messenger.com I had icon of Messenger.
					}
					else if (vc == 10) {
						// means actually active on messenger
						client = FACEBOOK_CLIENT_MOBILE;
					}
					else {
						client = FACEBOOK_CLIENT_OTHER;
					}*/

					setWString(hContact, "MirVer", client);
				}
			}
		}
		else if (t == "ticker_update:home") {
			if (!getByte(FACEBOOK_KEY_EVENT_TICKER_ENABLE, DEFAULT_EVENT_TICKER_ENABLE))
				continue;

			const JSONNode &actor_ = it["actor"];
			const JSONNode &story_ = it["story_xhp"];

			std::string text = story_.as_string();
			text = utils::text::html_entities_decode(utils::text::slashu_to_utf8(text));

			std::string url = utils::text::source_get_value(&text, 3, "\"tickerStoryLink\"", "href=\"", "\"");
			std::string story_type = utils::text::source_get_value2(&text, "\"type\":\"", "\"");
			std::string story_class = utils::text::source_get_value2(&text, "\"entstory_class\":\"", "\"");

			text = utils::text::trim(utils::text::remove_html(text));

			std::string userId = actor_.as_string();

			MCONTACT hContact = ContactIDToHContact(userId);

			debugLogA("+++ Got ticker type='%s' class='%s'", story_type.c_str(), story_class.c_str());

			if (!text.empty())
				NotifyEvent(m_tszUserName, ptrW(mir_utf8decodeW(text.c_str())), hContact, EVENT_TICKER, &url);
		}
		else if (t == "notifications_read" || t == "notifications_seen") { // revised 5.3.2017
			mir_cslock s(facy.notifications_lock_);

			const JSONNode &alerts = it["alert_ids"];
			for (auto &itAlerts : alerts) {
				auto itAlert = facy.notifications.find(itAlerts.as_string());
				if (itAlert != facy.notifications.end()) {
					if (itAlert->second->hWndPopup != nullptr)
						PUDeletePopup(itAlert->second->hWndPopup); // close popup

					delete itAlert->second;
					facy.notifications.erase(itAlert);
				}
			}
		}
		/*else if (t == "mobile_requests_count") { // revised 5.3.2017
			// Notifies about remaining friendship requests (happens e.g. after approving friendship)
			const JSONNode &num_friend_confirmed_unseen_ = it["num_friend_confirmed_unseen"]; // number, e.g. "0"
			const JSONNode &num_unread_ = it["num_unread"]; // number, e.g. "0"
			const JSONNode &num_unseen_ = it["num_unseen"]; // number, e.g. "0"
			const JSONNode &realtime_viewer_fbid_ = it["realtime_viewer_fbid"]; // our user fbid
		}
		else if (t == "friending_state_change") { // revised 5.3.2017
			const JSONNode &userid_ = it["userid"]; // fbid of user this event is about
			const JSONNode &realtime_viewer_fbid_ = it["realtime_viewer_fbid"]; // our user fbid
			const JSONNode &action_ = it["action"]; // "confirm" = when we approved friendship

			if (action_.as_string() == "confirm") {
				// ...
			}
		}
		else if (t == "inbox") { // revised 5.3.2017
			const JSONNode &realtime_viewer_fbid_ = it["realtime_viewer_fbid"]; // our user fbid
			const JSONNode &recent_unread_ = it["recent_unread"]; // number
			const JSONNode &seen_timestamp_ = it["seen_timestamp"]; // number
			const JSONNode &unread_ = it["unread"]; // number
			const JSONNode &unseen_ = it["unseen"]; // number
		}
		else if (t == "webrtc") { // revised 5.3.2017
			const JSONNode &realtime_viewer_fbid_ = it["realtime_viewer_fbid"]; // our user fbid
			const JSONNode &source_ = it["source"]; // e.g. "www"
			const JSONNode &msg_type_ = it["msg_type"]; // e.g. "hang_up", "other_dismiss", "ice_candidate", "offer", "offer_ack", ...?
			const JSONNode &id_ = it["id"]; // some numeric id
			const JSONNode &call_id_ = it["call_id"]; // some numeric id
			const JSONNode &from_ = it["from"]; // user fbid that started this event
			const JSONNode &payload_ = it["payload"]; // string with some metadata (usually same as above)
		}*/
		else
			continue;
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseUnreadThreads(std::string *data, std::vector< std::string >* threads)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &unread_threads = root["payload"].at("unread_thread_fbids");
	if (!unread_threads)
		return EXIT_FAILURE;

	for (auto &it : unread_threads) {
		// For multi user chats
		const JSONNode &thread_fbids = it["thread_fbids"];
		for (auto &jt : thread_fbids)
			threads->push_back(jt.as_string());

		// For classic conversations
		const JSONNode &other_user_fbids = it["other_user_fbids"];
		for (auto &jt : other_user_fbids)
			threads->push_back(jt.as_string());
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseThreadMessages(std::string *data, std::vector< facebook_message >* messages, bool unreadOnly)
{
	// cuts out the rest (summary result)
	size_t len = data->find("\r\n{\n   \"successful_results");
	if (len != data->npos)
		data->erase(len);

	// make data to be valid json (queries are standalone JSONs --> merge them into one)
	std::string::size_type n = 0;
	std::string replaceFrom = "}\r\n{";
	std::string replaceTo = ", ";
	while ((n = data->find(replaceFrom, n)) != std::string::npos) {
		data->replace(n, replaceFrom.size(), replaceTo);
		n += replaceTo.size();
	}

	JSONNode root = JSONNode::parse(data->c_str());
	if (!root)
		return EXIT_FAILURE;

	// since it could loop over multiple queries not all can be valid
	// so return EXIT_FAILURE only if none is processed
	bool hasResult = false;

	// loop over queries
	for (auto &itr : root) {
		const JSONNode &thread = itr["data"]["message_thread"];
		if (!thread)
			continue;

		const JSONNode &nodes = thread["messages"]["nodes"];
		if (!nodes)
			continue;

		// TODO! process commented sections and better pair json (this is just quick attempt, + I do not know what everything means yet)

		const JSONNode &other_user_fbid_ = thread["thread_key"]["other_user_id"];
		const JSONNode &thread_fbid_ = thread["thread_key"]["thread_fbid"];

		for (auto &it : nodes) {
			const JSONNode &author_ = it["message_sender"]["id"];
			const JSONNode &body_ = it["message"]["text"];
			const JSONNode &thread_id_ = it["offline_threading_id"];
			const JSONNode &mid_ = it["message_id"];
			const JSONNode &timestamp_ = it["timestamp_precise"];
			const JSONNode &is_unread_ = it["unread"];

			// Either there is "body" (for classic messages), or "log_message_type" and "log_message_body" (for log messages)
			const JSONNode &log_type_ = it["log_message_type"];
			const JSONNode &log_body_ = it["log_message_body"];
			const JSONNode &log_data_ = it["log_message_data"]; // additional data for this log message

			if (!author_ || (!body_ && !log_body_) || !mid_ || (!thread_fbid_ && !thread_id_) || !timestamp_) {
				debugLogA("ParseThreadMessages: ignoring message (%s) - missing attribute", mid_.as_string().c_str());
				continue;
			}

			std::string thread_id = thread_id_.as_string();
			std::string thread_fbid = thread_fbid_.as_string();
			std::string message_id = mid_.as_string();
			std::string message_text = body_ ? body_.as_string() : log_body_.as_string();
			std::string author_id = author_.as_string();
			std::string other_user_fbid = other_user_fbid_ ? other_user_fbid_.as_string() : "";
			std::string::size_type pos = author_id.find(":"); // strip "fbid:" prefix
			if (pos != std::string::npos)
				author_id = author_id.substr(pos + 1);

			// Process attachements and stickers
			ParseAttachments(message_text, it, other_user_fbid, true);

			message_text = utils::text::trim(utils::text::slashu_to_utf8(message_text), true);
			if (message_text.empty()) {
				debugLogA("ParseThreadMessages: ignoring message (%s) - empty message text", mid_.as_string().c_str());
				continue;
			}

			bool isUnread = is_unread_.as_bool();

			// Ignore read messages if we want only unread messages
			if (unreadOnly && !isUnread)
				continue;

			facebook_message message;
			message.message_text = message_text;
			message.time = utils::time::from_string(timestamp_.as_string());
			message.message_id = message_id;
			message.isIncoming = (author_id != facy.self_.user_id);
			message.isUnread = isUnread;

			message.isChat = other_user_fbid.empty();
			if (message.isChat) {
				message.user_id = author_id;
				message.thread_id = "id." + thread_fbid;
			}
			else {
				message.user_id = other_user_fbid;
				message.thread_id = thread_id;
			}

			ParseMessageType(message, log_type_, log_body_, log_data_);

			messages->push_back(message);
			hasResult = true;
		}
	}

	return hasResult ? EXIT_SUCCESS : EXIT_FAILURE;
}

int FacebookProto::ParseHistory(std::string *data, std::vector< facebook_message > &messages, std::string* firstTimestamp)
{
	size_t len = data->find("\r\n");
	if (len != data->npos)
		data->erase(len);

	JSONNode root = JSONNode::parse(data->c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &thread = root["o0"]["data"]["message_thread"];
	if (!thread)
		return EXIT_FAILURE;

	const JSONNode &nodes = thread["messages"]["nodes"];
	if (!nodes)
		return EXIT_FAILURE;

	// TODO! process commented sections and better pair json (this is just quick attempt, + I do not know what everything means yet)

	bool first = true;

	const JSONNode &other_user_fbid_ = thread["thread_key"]["other_user_id"];
	// const JSONNode &thread_fbid_ = thread["thread_key"]["thread_fbid"];

	for (auto &it : nodes) {
		const JSONNode &author = it["message_sender"]["id"];
		const JSONNode &body = it["message"]["text"];
		const JSONNode &tid = it["offline_threading_id"];
		const JSONNode &mid = it["message_id"];
		const JSONNode &timestamp = it["timestamp_precise"];
		// const JSONNode &filtered = it["is_filtered_content"];
		const JSONNode &is_unread = it["unread"];

		// Either there is "body" (for classic messages), or "log_message_type" and "log_message_body" (for log messages)
		const JSONNode &log_type_ = it["log_message_type"];
		const JSONNode &log_body_ = it["log_message_body"];
		const JSONNode &log_data_ = it["log_message_data"];

		if (!author || (!body && !log_body_) || !mid || !tid || !timestamp) {
			debugLogA("ParseHistory: ignoring message (%s) - missing attribute", mid.as_string().c_str());
			continue;
		}

		if (first) {
			*firstTimestamp = timestamp.as_string();
			first = false;
		}

		std::string thread_id = tid.as_string();
		std::string message_id = mid.as_string();
		std::string message_text = body ? body.as_string() : log_body_.as_string();
		std::string author_id = author.as_string();
		std::string other_user_id = other_user_fbid_ ? other_user_fbid_.as_string() : "";
		std::string::size_type pos = author_id.find(":"); // strip "fbid:" prefix
		if (pos != std::string::npos)
			author_id = author_id.substr(pos + 1);

		// Process attachements and stickers
		ParseAttachments(message_text, it, other_user_id, true);

		//if (filtered.as_bool() && message_text.empty())
		//	message_text = Translate("This message is no longer available, because it was marked as abusive or spam.");

		message_text = utils::text::trim(utils::text::slashu_to_utf8(message_text), true);
		if (message_text.empty()) {
			debugLogA("ParseHistory: ignoring message (%s) - empty message text", mid.as_string().c_str());
			continue;
		}

		facebook_message message;
		message.message_text = message_text;
		message.time = utils::time::from_string(timestamp.as_string());
		message.thread_id = thread_id;
		message.message_id = message_id;
		message.isIncoming = (author_id != facy.self_.user_id);
		message.isUnread = is_unread.as_bool();
		message.isChat = false;
		message.user_id = other_user_id;

		ParseMessageType(message, log_type_, log_body_, log_data_);

		messages.push_back(message);
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseThreadInfo(std::string *data, std::string *user_id)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &threads = root["payload"].at("threads");
	if (!threads)
		return EXIT_FAILURE;

	//std::map<std::string, std::string> thread_ids;
	for (auto &it : threads) {
		const JSONNode &canonical = it["canonical_fbid"];
		const JSONNode &thread_id = it["thread_id"];
		//const JSONNode &message_count = it["message_count"); // TODO: this could be useful for loading history from server
		if (!canonical || !thread_id)
			continue;

		std::string id = canonical.as_string();
		if (id == "null")
			continue;

		*user_id = id;
	}

	return EXIT_SUCCESS;
}


int FacebookProto::ParseUserInfo(std::string *data, facebook_user* fbu)
{
	std::string jsonData = data->substr(9);

	JSONNode root = JSONNode::parse(jsonData.c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &profiles = root["payload"].at("profiles");
	if (!profiles)
		return EXIT_FAILURE;

	//std::map<std::string, std::string> user_ids;
	for (auto &it : profiles) {
		// TODO: allow more users to parse at once
		std::string id = it.name();

		if (fbu->user_id == id) {
			parseUser(it, fbu);
			break;
		}
	}

	return EXIT_SUCCESS;
}

int FacebookProto::ParseMessagesCount(std::string *data, int *messagesCount, int *unreadCount)
{
	size_t len = data->find("\r\n");
	if (len != data->npos)
		data->erase(len);

	JSONNode root = JSONNode::parse(data->c_str());
	if (!root)
		return EXIT_FAILURE;

	const JSONNode &thread = root["o0"]["data"]["message_thread"];
	if (!thread)
		return EXIT_FAILURE;

	const JSONNode &message_count_ = thread["messages_count"];
	const JSONNode &unread_count_ = thread["unread_count"];

	if (!message_count_ || !unread_count_)
		return EXIT_FAILURE;

	*messagesCount = message_count_.as_int();
	*unreadCount = unread_count_.as_int();

	return EXIT_SUCCESS;
}