text: import { Alert } from 'react-native';
  import {
  	put, call, takeLatest, take, select, race, fork, cancel, takeEvery
  } from 'redux-saga/effects';
  import { delay } from 'redux-saga';
  import EJSON from 'ejson';
  
  import Navigation from '../lib/Navigation';
  import * as types from '../actions/actionsTypes';
  import { addUserTyping, removeUserTyping } from '../actions/room';
  import { messagesRequest, editCancel, replyCancel } from '../actions/messages';
  import RocketChat from '../lib/rocketchat';
  import database from '../lib/realm';
  import log from '../utils/log';
  import I18n from '../i18n';
  
  
  let sub;
  let thread;
  
  const cancelTyping = function* cancelTyping(username) {
  	while (true) {
  		const { typing, timeout } = yield race({
  			typing: take(types.ROOM.SOMEONE_TYPING),
  			timeout: call(delay, 5000)
  		});
  		if (timeout || (typing.username === username && !typing.typing)) {
  			return yield put(removeUserTyping(username));
  		}
  	}
  };
  
  const usersTyping = function* usersTyping({ rid }) {
  	while (true) {
  		const { _rid, username, typing } = yield take(types.ROOM.SOMEONE_TYPING);
  		if (_rid === rid) {
  			yield (typing ? put(addUserTyping(username)) : put(removeUserTyping(username)));
  			if (typing) {
  				yield fork(cancelTyping, username);
  			}
  		}
  	}
  };
  const handleMessageReceived = function* handleMessageReceived({ message }) {
  	try {
  		const room = yield select(state => state.room);
  
  		if (message.rid === room.rid) {
  			database.write(() => {
  				database.create('messages', EJSON.fromJSONValue(message), true);
  			});
  
  			if (room._id) {
  				RocketChat.readMessages(room.rid);
  			}
  		}
  	} catch (e) {
  		console.warn('handleMessageReceived', e);
  	}
  };
  
  let opened = false;
  
  const watchRoomOpen = function* watchRoomOpen({ room }) {
  	try {
  		if (opened) {
  			return;
  		}
  		opened = true;
  
  		const auth = yield select(state => state.login.isAuthenticated);
  		if (!auth) {
  			yield take(types.LOGIN.SUCCESS);
  		}
  
  		yield put(messagesRequest({ ...room }));
  
  		if (room._id) {
  			RocketChat.readMessages(room.rid);
  		}
  
  		sub = yield RocketChat.subscribeRoom(room);
  
  		thread = yield fork(usersTyping, { rid: room.rid });
  		yield race({
  			open: take(types.ROOM.OPEN),
  			close: take(types.ROOM.CLOSE)
  		});
  		opened = false;
  		cancel(thread);
  		sub.stop();
  		yield put(editCancel());
  		yield put(replyCancel());
  	} catch (e) {
  		log('watchRoomOpen', e);
  	}
  };
  
  const watchuserTyping = function* watchuserTyping({ status }) {
  	const auth = yield select(state => state.login.isAuthenticated);
  	if (!auth) {
  		yield take(types.LOGIN.SUCCESS);
  	}
  
  	const room = yield select(state => state.room);
  
  	if (!room) {
  		return;
  	}
  
  	try {
  		yield RocketChat.emitTyping(room.rid, status);
  
  		if (status) {
  			yield call(delay, 5000);
  			yield RocketChat.emitTyping(room.rid, false);
  		}
  	} catch (e) {
  		log('watchuserTyping', e);
  	}
  };
  
  const handleLeaveRoom = function* handleLeaveRoom({ rid, t }) {
  	try {
  		const result = yield RocketChat.leaveRoom(rid, t);
  		if (result.success) {
  			yield Navigation.navigate('RoomsListView');
  		}
  	} catch (e) {
  		if (e.data && e.data.errorType === 'error-you-are-last-owner') {
  			Alert.alert(I18n.t('Oops'), I18n.t(e.data.errorType));
  		} else {
  			Alert.alert(I18n.t('Oops'), I18n.t('There_was_an_error_while_action', { action: I18n.t('leaving_room') }));
  		}
  	}
  };
  
  const handleEraseRoom = function* handleEraseRoom({ rid, t }) {
  	try {
  		const result = yield RocketChat.eraseRoom(rid, t);
  		if (result.success) {
  			yield Navigation.navigate('RoomsListView');
  		}
  	} catch (e) {
  		Alert.alert(I18n.t('Oops'), I18n.t('There_was_an_error_while_action', { action: I18n.t('erasing_room') }));
  	}
  };
  
  const root = function* root() {
  	yield takeLatest(types.ROOM.USER_TYPING, watchuserTyping);
  	yield takeEvery(types.ROOM.OPEN, watchRoomOpen);
  	yield takeEvery(types.ROOM.MESSAGE_RECEIVED, handleMessageReceived);
  	yield takeLatest(types.ROOM.LEAVE, handleLeaveRoom);
  	yield takeLatest(types.ROOM.ERASE, handleEraseRoom);
  };
  export default root;
  