gab-social/app/javascript/gabsocial/pages/group_page.js

import React from 'react'
import PropTypes from 'prop-types'
import { connect } from 'react-redux'
import { defineMessages, injectIntl } from 'react-intl'
import ImmutablePropTypes from 'react-immutable-proptypes'
import ImmutablePureComponent from 'react-immutable-pure-component'
import { fetchGroup } from '../actions/groups'
import PageTitle from '../features/ui/util/page_title'
import GroupLayout from '../layouts/group_layout'
import TimelineComposeBlock from '../components/timeline_compose_block'
import Block from '../components/block'
import ColumnIndicator from '../components/column_indicator'
import Divider from '../components/divider'

class GroupPage extends ImmutablePureComponent {

	componentDidMount() {
		this.props.dispatch(fetchGroup(this.props.params.id))
	}

	componentDidUpdate(prevProps) {
		if (prevProps.params.id !== this.props.params.id) {
			this.props.dispatch(fetchGroup(this.props.params.id))
		}
	}

	render() {
		const {
			intl,
			children,
			group,
			relationships,
			isTimeline,
		} = this.props

		const groupTitle = !!group ? group.get('title') : ''
		const groupId = !!group ? group.get('id') : undefined
		
		const isPrivate = !!group ? group.get('is_private') : false
		const isMember = !!relationships ? relationships.get('member') : false
		const unavailable = isPrivate && !isMember

		if (!!group) {
      if (group.get('archived')) return null
		}

		return (
			<GroupLayout
				title={'Group'}
				group={group}
				groupId={groupId}
				relationships={relationships}
			>
				<PageTitle path={[groupTitle, intl.formatMessage(messages.group)]} />
				
				{
					!!relationships && isTimeline && isMember &&
					<React.Fragment>
						<TimelineComposeBlock size={46} groupId={groupId} autoFocus />
						<Divider />
					</React.Fragment>
				}

				{
					unavailable &&
					<Block>
						<ColumnIndicator type='error' message={intl.formatMessage(messages.groupPrivate)} />
					</Block>
				}

				{
					!unavailable && children
				}
			</GroupLayout>
		)
	}
}

const messages = defineMessages({
	group: { id: 'group', defaultMessage: 'Group' },
	groupPrivate: { id: 'group_private', defaultMessage: 'This group is private. You must request to join in order to view this group.' },
})

const mapStateToProps = (state, { params: { id } }) => ({
	group: state.getIn(['groups', id]),
	relationships: state.getIn(['group_relationships', id]),
})

GroupPage.propTypes = {
	intl: PropTypes.object.isRequired,
	group: ImmutablePropTypes.map,
	children: PropTypes.node.isRequired,
	relationships: ImmutablePropTypes.map,
	dispatch: PropTypes.func.isRequired,
	sortByValue: PropTypes.string.isRequired,
	sortByTopValue: PropTypes.string.isRequired,
}

export default injectIntl(connect(mapStateToProps)(GroupPage))