text: import React, { useState, useEffect, useMemo } from 'react';
  import { Field, TextInput, Select, ButtonGroup, Button, Box, Icon, Callout, FieldGroup } from '@rocket.chat/fuselage';
  import { css } from '@rocket.chat/css-in-js';
  import { useMutableCallback } from '@rocket.chat/fuselage-hooks';
  import toastr from 'toastr';
  
  import VerticalBar from '../../components/basic/VerticalBar';
  import { UserAutoComplete } from '../../components/basic/AutoComplete';
  import { useTranslation } from '../../contexts/TranslationContext';
  import { useForm } from '../../hooks/useForm';
  import { useUserRoom } from '../hooks/useUserRoom';
  import { useEndpoint } from '../../contexts/ServerContext';
  import { roomTypes, isEmail } from '../../../app/utils';
  
  const clickable = css`
  	cursor: pointer;
  `;
  
  const FileExport = ({ onCancel, rid }) => {
  	const t = useTranslation();
  
  	const { values, handlers } = useForm({
  		dateFrom: '',
  		dateTo: '',
  		format: 'html',
  	});
  
  	const {
  		dateFrom,
  		dateTo,
  		format,
  	} = values;
  
  	const {
  		handleDateFrom,
  		handleDateTo,
  		handleFormat,
  	} = handlers;
  
  	const outputOptions = useMemo(() => [
  		['html', t('HTML')],
  		['json', t('JSON')],
  	], [t]);
  
  	const roomsExport = useEndpoint('POST', 'rooms.export');
  
  	const handleSubmit = async () => {
  		try {
  			await roomsExport({
  				rid,
  				type: 'file',
  				...dateFrom && { dateFrom: new Date(dateFrom) },
  				...dateTo && { dateTo: new Date(dateTo) },
  				format,
  			});
  
  			toastr.success(t('Your_email_has_been_queued_for_sending'));
  			return;
  		} catch (error) {
  			toastr.error(t('Error'));
  		}
  	};
  
  	return (
  		<FieldGroup>
  			<Field>
  				<Field.Label>{t('Date_From')}</Field.Label>
  				<Field.Row>
  					<TextInput type='date' value={dateFrom} onChange={handleDateFrom} />
  				</Field.Row>
  			</Field>
  			<Field>
  				<Field.Label>{t('Date_to')}</Field.Label>
  				<Field.Row>
  					<TextInput type='date' value={dateTo} onChange={handleDateTo} />
  				</Field.Row>
  			</Field>
  			<Field>
  				<Field.Label>{t('Output_format')}</Field.Label>
  				<Field.Row>
  					<Select value={format} onChange={handleFormat} placeholder={t('Format')} options={outputOptions}/>
  				</Field.Row>
  			</Field>
  			<ButtonGroup stretch mb='x12'>
  				<Button onClick={onCancel}>
  					{t('Cancel')}
  				</Button>
  				<Button primary onClick={() => handleSubmit()}>
  					{t('Export')}
  				</Button>
  			</ButtonGroup>
  		</FieldGroup>
  	);
  };
  
  const MailExportForm = ({ onCancel, rid }) => {
  	const t = useTranslation();
  
  	const room = useUserRoom(rid);
  	const roomName = room && room.t && roomTypes.getRoomName(room.t, room);
  
  	const [selectedMessages, setSelected] = useState([]);
  
  	const [errorMessage, setErrorMessage] = useState();
  
  	const { values, handlers } = useForm({
  		dateFrom: '',
  		dateTo: '',
  		toUsers: '',
  		additionalEmails: '',
  		subject: t('Mail_Messages_Subject', roomName),
  	});
  
  	const {
  		toUsers,
  		additionalEmails,
  		subject,
  	} = values;
  
  	const add = useMutableCallback((id) => setSelected(selectedMessages.concat(id)));
  	const remove = useMutableCallback((id) => setSelected(selectedMessages.filter((message) => message !== id)));
  	const reset = useMutableCallback(() => {
  		setSelected([]);
  		$(`#chat-window-${ rid }.messages-box .message.selected`)
  			.removeClass('selected');
  	});
  
  	useEffect(() => {
  		const $root = $(`#chat-window-${ rid }`);
  		$('.messages-box', $root).addClass('selectable');
  		const handler = function() {
  			const { id } = this;
  
  			if (this.classList.contains('selected')) {
  				this.classList.remove('selected');
  				remove(id);
  			} else {
  				this.classList.add('selected');
  				add(id);
  			}
  		};
  		$('.messages-box .message', $root).on('click', handler);
  
  		return () => {
  			$('.messages-box', $root).removeClass('selectable');
  			$('.messages-box .message', $root)
  				.off('click', handler)
  				.filter('.selected')
  				.removeClass('selected');
  		};
  	}, [rid]);
  
  	const {
  		handleToUsers,
  		handleAdditionalEmails,
  		handleSubject,
  	} = handlers;
  
  	const roomsExport = useEndpoint('POST', 'rooms.export');
  
  	const handleSubmit = async () => {
  		if (toUsers.length === 0 && additionalEmails === '') {
  			setErrorMessage(t('Mail_Message_Missing_to'));
  			return;
  		}
  		if (additionalEmails !== '' && !isEmail(additionalEmails)) {
  			setErrorMessage(t('Mail_Message_Invalid_emails', additionalEmails));
  			return;
  		}
  		if (selectedMessages.length === 0) {
  			setErrorMessage(t('Mail_Message_No_messages_selected_select_all'));
  			return;
  		}
  		setErrorMessage(null);
  
  		try {
  			await roomsExport({
  				rid,
  				type: 'email',
  				toUsers: [toUsers],
  				toEmails: additionalEmails.split(','),
  				subject,
  				messages: selectedMessages,
  			});
  
  			toastr.success(t('Your_email_has_been_queued_for_sending'));
  			return;
  		} catch (error) {
  			toastr.error(t('Error'));
  		}
  	};
  
  	return (
  		<FieldGroup>
  			<Field>
  				<Callout onClick={reset} title={t('Messages selected')} type={selectedMessages.length > 0 ? 'success' : 'info'}>
  					<p>{`${ selectedMessages.length } Messages selected`}</p>
  					{ selectedMessages.length > 0 && <Box is='p' className={clickable} >{t('Click here to clear the selection')}</Box> }
  					{ selectedMessages.length === 0 && <Box is='p'>{t('Click_the_messages_you_would_like_to_send_by_email')}</Box> }
  				</Callout>
  			</Field>
  			<Field>
  				<Field.Label>{t('To_users')}</Field.Label>
  				<Field.Row>
  					<UserAutoComplete value={toUsers} onChange={handleToUsers}/>
  				</Field.Row>
  			</Field>
  			<Field>
  				<Field.Label>{t('To_additional_emails')}</Field.Label>
  				<Field.Row>
  					<TextInput placeholder={t('Email_Placeholder_any')} value={additionalEmails} onChange={handleAdditionalEmails} addon={<Icon name='mail' size='x20'/>} />
  				</Field.Row>
  			</Field>
  			<Field>
  				<Field.Label>{t('Subject')}</Field.Label>
  				<Field.Row>
  					<TextInput value={subject} onChange={handleSubject} addon={<Icon name='edit' size='x20'/>} />
  				</Field.Row>
  			</Field>
  
  			{ errorMessage && <Callout type={'danger'} title={errorMessage} /> }
  
  			<ButtonGroup stretch mb='x12'>
  				<Button onClick={onCancel}>
  					{t('Cancel')}
  				</Button>
  				<Button primary onClick={() => handleSubmit()}>
  					{t('Send')}
  				</Button>
  			</ButtonGroup>
  		</FieldGroup>
  	);
  };
  
  export const ExportMessages = function ExportMessages({ rid, tabBar }) {
  	const t = useTranslation();
  
  	const [type, setType] = useState('email');
  
  	const exportOptions = useMemo(() => [
  		['email', t('Send_via_email')],
  		['file', t('Export_as_file')],
  	], [t]);
  
  	return (
  		<VerticalBar>
  			<VerticalBar.Header>
  				{t('Export_Messages')}
  				<VerticalBar.Close onClick={() => tabBar.close()} />
  			</VerticalBar.Header>
  			<VerticalBar.ScrollableContent>
  				<FieldGroup>
  					<Field>
  						<Field.Label>{t('Method')}</Field.Label>
  						<Field.Row>
  							<Select value={type} onChange={(value) => setType(value)} placeholder={t('Type')} options={exportOptions}/>
  						</Field.Row>
  					</Field>
  				</FieldGroup>
  				{type && type === 'file' && <FileExport rid={rid} onCancel={() => tabBar.close()} />}
  				{type && type === 'email' && <MailExportForm rid={rid} onCancel={() => tabBar.close()} />}
  			</VerticalBar.ScrollableContent>
  		</VerticalBar>
  	);
  };
  
  export default ExportMessages;
  