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YuruToot/app/assets/javascripts/components/features/notifications/index.jsx

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import { connect } from 'react-redux';
import PureRenderMixin from 'react-addons-pure-render-mixin';
import ImmutablePropTypes from 'react-immutable-proptypes';
import Column from '../ui/components/column';
import { expandNotifications, clearNotifications, scrollTopNotifications } from '../../actions/notifications';
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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';
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const messages = defineMessages({
title: { id: 'column.notifications', defaultMessage: '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'))));
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const mapStateToProps = state => ({
notifications: getNotifications(state),
isLoading: state.getIn(['notifications', 'isLoading'], true),
isUnread: state.getIn(['notifications', 'unread']) > 0
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});
const Notifications = React.createClass({
propTypes: {
notifications: ImmutablePropTypes.list.isRequired,
dispatch: React.PropTypes.func.isRequired,
trackScroll: React.PropTypes.bool,
intl: React.PropTypes.object.isRequired,
isLoading: React.PropTypes.bool,
isUnread: React.PropTypes.bool
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},
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getDefaultProps () {
return {
trackScroll: true
};
},
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mixins: [PureRenderMixin],
handleScroll (e) {
const { scrollTop, scrollHeight, clientHeight } = e.target;
const offset = scrollHeight - scrollTop - clientHeight;
this._oldScrollPosition = scrollHeight - scrollTop;
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if (250 > offset && !this.props.isLoading) {
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this.props.dispatch(expandNotifications());
} else if (scrollTop < 100) {
this.props.dispatch(scrollTopNotifications(true));
} else {
this.props.dispatch(scrollTopNotifications(false));
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}
},
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 () {
this.props.dispatch(clearNotifications());
},
setRef (c) {
this.node = c;
},
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render () {
const { intl, notifications, trackScroll, 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>
);
}
if (trackScroll) {
return (
<Column icon='bell' active={isUnread} heading={intl.formatMessage(messages.title)}>
<ColumnSettingsContainer />
<ClearColumnButton onClick={this.handleClear} />
<ScrollContainer scrollKey='notifications'>
{scrollableArea}
</ScrollContainer>
</Column>
);
} else {
return (
<Column icon='bell' active={isUnread} heading={intl.formatMessage(messages.title)}>
<ColumnSettingsContainer />
<ClearColumnButton onClick={this.handleClear} />
{scrollableArea}
</Column>
);
}
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}
});
export default connect(mapStateToProps)(injectIntl(Notifications));