59 lines
1.3 KiB
JavaScript
59 lines
1.3 KiB
JavaScript
import React, { Component } from 'react';
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import { connect } from 'react-redux';
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import { getParticipantCount } from '../../base/participants';
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/**
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* React component for showing a badge with the current count of conference
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* participants.
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*
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* @extends Component
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*/
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class ParticipantCounter extends Component {
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/**
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* {@code ParticipantCounter} component's property types.
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*
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* @static
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*/
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static propTypes = {
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/**
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* The number of participants in the conference.
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*/
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_count: React.PropTypes.number
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};
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/**
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* Implements React's {@link Component#render()}.
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*
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* @inheritdoc
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* @returns {ReactElement}
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*/
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render() {
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return (
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<span className = 'badge-round'>
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<span id = 'numberOfParticipants'>
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{ this.props._count }
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</span>
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</span>
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);
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}
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}
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/**
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* Maps (parts of) the Redux state to the associated
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* {@code ParticipantCounter}'s props.
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*
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* @param {Object} state - The Redux state.
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* @private
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* @returns {{
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* _count: number
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* }}
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*/
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function _mapStateToProps(state) {
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return {
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_count: getParticipantCount(state)
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};
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}
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export default connect(_mapStateToProps)(ParticipantCounter);
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