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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 '../../components/column';
import ColumnHeader from '../../components/column_header';
import { expandNotifications, scrollTopNotifications } from '../../actions/notifications';
import { addColumn, removeColumn, moveColumn } from '../../actions/columns';
import NotificationContainer from './containers/notification_container';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import ColumnSettingsContainer from './containers/column_settings_container';
import { createSelector } from 'reselect';
import { List as ImmutableList } from 'immutable';
import { debounce } from 'lodash';
import ScrollableList from '../../components/scrollable_list';
import LoadGap from '../../components/load_gap';
const messages = defineMessages({
title: { id: 'column.notifications', defaultMessage: 'Notifications' },
});
const getNotifications = createSelector([
state => ImmutableList(state.getIn(['settings', 'notifications', 'shows']).filter(item => !item).keys()),
state => state.getIn(['notifications', 'items']),
], (excludedTypes, notifications) => notifications.filterNot(item => item !== null && excludedTypes.includes(item.get('type'))));
const mapStateToProps = state => ({
notifications: getNotifications(state),
isLoading: state.getIn(['notifications', 'isLoading'], true),
isUnread: state.getIn(['notifications', 'unread']) > 0,
hasMore: state.getIn(['notifications', 'hasMore']),
});
@connect(mapStateToProps)
@injectIntl
export default class Notifications extends React.PureComponent {
static propTypes = {
columnId: PropTypes.string,
notifications: ImmutablePropTypes.list.isRequired,
dispatch: PropTypes.func.isRequired,
shouldUpdateScroll: PropTypes.func,
intl: PropTypes.object.isRequired,
isLoading: PropTypes.bool,
isUnread: PropTypes.bool,
multiColumn: PropTypes.bool,
hasMore: PropTypes.bool,
};
static defaultProps = {
trackScroll: true,
};
componentWillUnmount () {
this.handleLoadOlder.cancel();
this.handleScrollToTop.cancel();
this.handleScroll.cancel();
this.props.dispatch(scrollTopNotifications(false));
}
handleLoadGap = (maxId) => {
this.props.dispatch(expandNotifications({ maxId }));
};
handleLoadOlder = debounce(() => {
const last = this.props.notifications.last();
this.props.dispatch(expandNotifications({ maxId: last && last.get('id') }));
}, 300, { leading: true });
handleScrollToTop = debounce(() => {
this.props.dispatch(scrollTopNotifications(true));
}, 100);
handleScroll = debounce(() => {
this.props.dispatch(scrollTopNotifications(false));
}, 100);
handlePin = () => {
const { columnId, dispatch } = this.props;
if (columnId) {
dispatch(removeColumn(columnId));
} else {
dispatch(addColumn('NOTIFICATIONS', {}));
}
}
handleMove = (dir) => {
const { columnId, dispatch } = this.props;
dispatch(moveColumn(columnId, dir));
}
handleHeaderClick = () => {
this.column.scrollTop();
}
setColumnRef = c => {
this.column = c;
}
handleMoveUp = id => {
const elementIndex = this.props.notifications.findIndex(item => item !== null && item.get('id') === id) - 1;
this._selectChild(elementIndex);
}
handleMoveDown = id => {
const elementIndex = this.props.notifications.findIndex(item => item !== null && item.get('id') === id) + 1;
this._selectChild(elementIndex);
}
_selectChild (index) {
const element = this.column.node.querySelector(`article:nth-of-type(${index + 1}) .focusable`);
if (element) {
element.focus();
}
}
render () {
const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore } = this.props;
const pinned = !!columnId;
const emptyMessage = <FormattedMessage id='empty_column.notifications' defaultMessage="You don't have any notifications yet. Interact with others to start the conversation." />;
let scrollableContent = null;
if (isLoading && this.scrollableContent) {
scrollableContent = this.scrollableContent;
} else if (notifications.size > 0 || hasMore) {
scrollableContent = notifications.map((item, index) => item === null ? (
<LoadGap
key={'gap:' + notifications.getIn([index + 1, 'id'])}
disabled={isLoading}
maxId={index > 0 ? notifications.getIn([index - 1, 'id']) : null}
onClick={this.handleLoadGap}
/>
) : (
<NotificationContainer
key={item.get('id')}
notification={item}
accountId={item.get('account')}
onMoveUp={this.handleMoveUp}
onMoveDown={this.handleMoveDown}
/>
));
} else {
scrollableContent = null;
}
this.scrollableContent = scrollableContent;
const scrollContainer = (
<ScrollableList
scrollKey={`notifications-${columnId}`}
trackScroll={!pinned}
isLoading={isLoading}
hasMore={hasMore}
emptyMessage={emptyMessage}
onLoadMore={this.handleLoadOlder}
onScrollToTop={this.handleScrollToTop}
onScroll={this.handleScroll}
shouldUpdateScroll={shouldUpdateScroll}
>
{scrollableContent}
</ScrollableList>
);
return (
<Column ref={this.setColumnRef}>
<ColumnHeader
icon='bell'
active={isUnread}
title={intl.formatMessage(messages.title)}
onPin={this.handlePin}
onMove={this.handleMove}
onClick={this.handleHeaderClick}
pinned={pinned}
multiColumn={multiColumn}
>
<ColumnSettingsContainer />
</ColumnHeader>
{scrollContainer}
</Column>
);
}
}
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