jiti-meet/react/features/connection-indicator/components/AbstractConnectionIndicator.js

174 lines
4.9 KiB
JavaScript

// @flow
import { Component } from 'react';
import statsEmitter from '../statsEmitter';
declare var interfaceConfig: Object;
/**
* The connection quality percentage that must be reached to be considered of
* good quality and can result in the connection indicator being hidden.
*
* @type {number}
*/
export const INDICATOR_DISPLAY_THRESHOLD = 30;
/**
* The type of the React {@code Component} props of {@link ConnectionIndicator}.
*/
export type Props = {
/**
* The ID of the participant associated with the displayed connection indication and
* stats.
*/
participantId: string
};
/**
* The type of the React {@code Component} state of {@link ConnectionIndicator}.
*/
export type State = {
/**
* Whether or not a CSS class should be applied to the root for hiding the
* connection indicator. By default the indicator should start out hidden
* because the current connection status is not known at mount.
*/
showIndicator: boolean,
/**
* Cache of the stats received from subscribing to stats emitting. The keys
* should be the name of the stat. With each stat update, updates stats are
* mixed in with cached stats and a new stats object is set in state.
*/
stats: Object
};
/**
* Implements a React {@link Component} which displays the current connection
* quality.
*
* @extends {Component}
*/
export default class AbstractConnectionIndicator<P: Props, S: State> extends Component<P, S> {
/**
* The timeout for automatically hiding the indicator.
*/
autoHideTimeout: ?TimeoutID
/**
* Initializes a new {@code ConnectionIndicator} instance.
*
* @param {P} props - The read-only properties with which the new
* instance is to be initialized.
*/
constructor(props: P) {
super(props);
// Bind event handlers so they are only bound once for every instance.
this._onStatsUpdated = this._onStatsUpdated.bind(this);
}
/**
* Starts listening for stat updates.
*
* @inheritdoc
* returns {void}
*/
componentDidMount() {
statsEmitter.subscribeToClientStats(
this.props.participantId, this._onStatsUpdated);
}
/**
* Updates which user's stats are being listened to.
*
* @inheritdoc
* returns {void}
*/
componentDidUpdate(prevProps: Props) {
if (prevProps.participantId !== this.props.participantId) {
statsEmitter.unsubscribeToClientStats(
prevProps.participantId, this._onStatsUpdated);
statsEmitter.subscribeToClientStats(
this.props.participantId, this._onStatsUpdated);
}
}
/**
* Cleans up any queued processes, which includes listening for new stats
* and clearing any timeout to hide the indicator.
*
* @private
* @returns {void}
*/
componentWillUnmount() {
statsEmitter.unsubscribeToClientStats(
this.props.participantId, this._onStatsUpdated);
clearTimeout(this.autoHideTimeout);
}
_onStatsUpdated: (Object) => void;
/**
* Callback invoked when new connection stats associated with the passed in
* user ID are available. Will update the component's display of current
* statistics.
*
* @param {Object} stats - Connection stats from the library.
* @private
* @returns {void}
*/
_onStatsUpdated(stats = {}) {
// Rely on React to batch setState actions.
const { connectionQuality } = stats;
const newPercentageState = typeof connectionQuality === 'undefined'
? {} : { percent: connectionQuality };
const newStats = Object.assign(
{},
this.state.stats,
stats,
newPercentageState);
this.setState({
stats: newStats
});
this._updateIndicatorAutoHide(newStats.percent);
}
/**
* Updates the internal state for automatically hiding the indicator.
*
* @param {number} percent - The current connection quality percentage
* between the values 0 and 100.
* @private
* @returns {void}
*/
_updateIndicatorAutoHide(percent) {
if (percent < INDICATOR_DISPLAY_THRESHOLD) {
clearTimeout(this.autoHideTimeout);
this.autoHideTimeout = undefined;
this.setState({
showIndicator: true
});
} else if (this.autoHideTimeout) {
// This clause is intentionally left blank because no further action
// is needed if the percent is below the threshold and there is an
// autoHideTimeout set.
} else {
this.autoHideTimeout = setTimeout(() => {
this.setState({
showIndicator: false
});
}, typeof interfaceConfig === 'undefined'
? 5000
: interfaceConfig.CONNECTION_INDICATOR_AUTO_HIDE_TIMEOUT);
}
}
}