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// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import React from 'react';
import {FormattedMessage} from 'react-intl';
export default class NewMessageIndicator extends React.Component {
constructor(props) {
super(props);
this.state = {
visible: false,
rendered: false
};
}
componentWillReceiveProps(nextProps) {
if (nextProps.newMessages > 0) {
this.setState({rendered: true}, () => {
this.setState({visible: true});
});
} else {
this.setState({visible: false});
}
}
render() {
let className = 'new-messages__button';
if (this.state.visible > 0) {
className += ' visible';
}
if (!this.state.rendered) {
className += ' disabled';
}
return (
<div
className={className}
onTransitionEnd={this.setRendered.bind(this)}
ref='indicator'
>
<div onClick={this.props.onClick}>
<i
className='fa fa-angle-down'
/>
<FormattedMessage
id='posts_view.newMsgBelow'
defaultMessage='New {count, plural, one {message} other {messages}} below'
values={{count: this.props.newMessages}}
/>
</div>
</div>
);
}
// Sync 'rendered' state with visibility param, only after transitions
// have ended
setRendered() {
this.setState({rendered: this.state.visible});
}
}
NewMessageIndicator.defaultProps = {
newMessages: 0
};
NewMessageIndicator.propTypes = {
onClick: React.PropTypes.func.isRequired,
newMessages: React.PropTypes.number
};
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