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import React from 'react';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import ImmutablePropTypes from 'react-immutable-proptypes';
import Column from '../ui/components/column';
import { expandNotifications, clearNotifications, scrollTopNotifications } from '../../actions/notifications';
import NotificationContainer from './containers/notification_container';
import { ScrollContainer } from 'react-router-scroll';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import ColumnSettingsContainer from './containers/column_settings_container';
import { createSelector } from 'reselect';
import Immutable from 'immutable';
import LoadMore from '../../components/load_more';
import ClearColumnButton from './components/clear_column_button';
import { openModal } from '../../actions/modal';
const messages = defineMessages({
title: { id: 'column.notifications', defaultMessage: 'Notifications' },
clearMessage: { id: 'notifications.clear_confirmation', defaultMessage: 'Are you sure you want to permanently clear all your notifications?' },
clearConfirm: { id: 'notifications.clear', defaultMessage: 'Clear notifications' }
});
const getNotifications = createSelector([
state => Immutable.List(state.getIn(['settings', 'notifications', 'shows']).filter(item => !item).keys()),
state => state.getIn(['notifications', 'items'])
], (excludedTypes, notifications) => notifications.filterNot(item => excludedTypes.includes(item.get('type'))));
const mapStateToProps = state => ({
notifications: getNotifications(state),
isLoading: state.getIn(['notifications', 'isLoading'], true),
isUnread: state.getIn(['notifications', 'unread']) > 0
});
class Notifications extends React.PureComponent {
static propTypes = {
notifications: ImmutablePropTypes.list.isRequired,
dispatch: PropTypes.func.isRequired,
shouldUpdateScroll: PropTypes.func,
intl: PropTypes.object.isRequired,
isLoading: PropTypes.bool,
isUnread: PropTypes.bool
};
static defaultProps = {
trackScroll: true
};
handleScroll = (e) => {
const { scrollTop, scrollHeight, clientHeight } = e.target;
const offset = scrollHeight - scrollTop - clientHeight;
this._oldScrollPosition = scrollHeight - scrollTop;
if (250 > offset && !this.props.isLoading) {
this.props.dispatch(expandNotifications());
} else if (scrollTop < 100) {
this.props.dispatch(scrollTopNotifications(true));
} else {
this.props.dispatch(scrollTopNotifications(false));
}
}
componentDidUpdate (prevProps) {
if (this.node.scrollTop > 0 && (prevProps.notifications.size < this.props.notifications.size && prevProps.notifications.first() !== this.props.notifications.first() && !!this._oldScrollPosition)) {
this.node.scrollTop = this.node.scrollHeight - this._oldScrollPosition;
}
}
handleLoadMore = (e) => {
e.preventDefault();
this.props.dispatch(expandNotifications());
}
handleClear = () => {
const { dispatch, intl } = this.props;
dispatch(openModal('CONFIRM', {
message: intl.formatMessage(messages.clearMessage),
confirm: intl.formatMessage(messages.clearConfirm),
onConfirm: () => dispatch(clearNotifications())
}));
}
setRef = (c) => {
this.node = c;
}
render () {
const { intl, notifications, shouldUpdateScroll, isLoading, isUnread } = this.props;
let loadMore = '';
let scrollableArea = '';
let unread = '';
if (!isLoading && notifications.size > 0) {
loadMore = <LoadMore onClick={this.handleLoadMore} />;
}
if (isUnread) {
unread = <div className='notifications__unread-indicator' />;
}
if (isLoading || notifications.size > 0) {
scrollableArea = (
<div className='scrollable' onScroll={this.handleScroll} ref={this.setRef}>
{unread}
<div>
{notifications.map(item => <NotificationContainer key={item.get('id')} notification={item} accountId={item.get('account')} />)}
{loadMore}
</div>
</div>
);
} else {
scrollableArea = (
<div className='empty-column-indicator' ref={this.setRef}>
<FormattedMessage id='empty_column.notifications' defaultMessage="You don't have any notifications yet. Interact with others to start the conversation." />
</div>
);
}
return (
<Column icon='bell' active={isUnread} heading={intl.formatMessage(messages.title)}>
<ColumnSettingsContainer />
<ClearColumnButton onClick={this.handleClear} />
<ScrollContainer scrollKey='notifications' shouldUpdateScroll={shouldUpdateScroll}>
{scrollableArea}
</ScrollContainer>
</Column>
);
}
}
export default connect(mapStateToProps)(injectIntl(Notifications));
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