msc-node/lib/DataProducer.js

mediasoup client side Node.js library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DataProducer = void 0;
const Logger_1 = require("./Logger");
const EnhancedEventEmitter_1 = require("./EnhancedEventEmitter");
const errors_1 = require("./errors");
const logger = new Logger_1.Logger('DataProducer');
class DataProducer extends EnhancedEventEmitter_1.EnhancedEventEmitter {
    /**
     * @emits transportclose
     * @emits open
     * @emits error - (error: Error)
     * @emits close
     * @emits bufferedamountlow
     * @emits @close
     */
    constructor({ id, dataChannel, sctpStreamParameters, appData }) {
        super();
        // Closed flag.
        this._closed = false;
        // Observer instance.
        this._observer = new EnhancedEventEmitter_1.EnhancedEventEmitter();
        logger.debug('constructor()');
        this._id = id;
        this._dataChannel = dataChannel;
        this._sctpStreamParameters = sctpStreamParameters;
        this._appData = appData;
        this._handleDataChannel();
    }
    /**
     * DataProducer id.
     */
    get id() {
        return this._id;
    }
    /**
     * Whether the DataProducer is closed.
     */
    get closed() {
        return this._closed;
    }
    /**
     * SCTP stream parameters.
     */
    get sctpStreamParameters() {
        return this._sctpStreamParameters;
    }
    /**
     * DataChannel readyState.
     */
    get readyState() {
        return this._dataChannel.readyState;
    }
    /**
     * DataChannel label.
     */
    get label() {
        return this._dataChannel.label;
    }
    /**
     * DataChannel protocol.
     */
    get protocol() {
        return this._dataChannel.protocol;
    }
    /**
     * DataChannel bufferedAmount.
     */
    get bufferedAmount() {
        return this._dataChannel.bufferedAmount;
    }
    /**
     * DataChannel bufferedAmountLowThreshold.
     */
    get bufferedAmountLowThreshold() {
        return this._dataChannel.bufferedAmountLowThreshold;
    }
    /**
     * Set DataChannel bufferedAmountLowThreshold.
     */
    set bufferedAmountLowThreshold(bufferedAmountLowThreshold) {
        this._dataChannel.bufferedAmountLowThreshold = bufferedAmountLowThreshold;
    }
    /**
     * App custom data.
     */
    get appData() {
        return this._appData;
    }
    /**
     * Invalid setter.
     */
    set appData(appData) {
        throw new Error('cannot override appData object');
    }
    /**
     * Observer.
     *
     * @emits close
     */
    get observer() {
        return this._observer;
    }
    /**
     * Closes the DataProducer.
     */
    close() {
        if (this._closed) {
            return;
        }
        logger.debug('close()');
        this._closed = true;
        this._dataChannel.close();
        this.emit('@close');
        // Emit observer event.
        this._observer.safeEmit('close');
    }
    /**
     * Transport was closed.
     */
    transportClosed() {
        if (this._closed) {
            return;
        }
        logger.debug('transportClosed()');
        this._closed = true;
        this._dataChannel.close();
        this.safeEmit('transportclose');
        // Emit observer event.
        this._observer.safeEmit('close');
    }
    /**
     * Send a message.
     *
     * @param {String|Blob|ArrayBuffer|ArrayBufferView} data.
     */
    send(data) {
        logger.debug('send()');
        if (this._closed) {
            throw new errors_1.InvalidStateError('closed');
        }
        this._dataChannel.send(data);
    }
    _handleDataChannel() {
        this._dataChannel.addEventListener('open', () => {
            if (this._closed) {
                return;
            }
            logger.debug('DataChannel "open" event');
            this.safeEmit('open');
        });
        this._dataChannel.addEventListener('error', (event) => {
            if (this._closed) {
                return;
            }
            let { error } = event;
            if (!error) {
                error = new Error('unknown DataChannel error');
            }
            if (error.errorDetail === 'sctp-failure') {
                logger.error('DataChannel SCTP error [sctpCauseCode:%s]: %s', error.sctpCauseCode, error.message);
            }
            else {
                logger.error('DataChannel "error" event: %o', error);
            }
            this.safeEmit('error', error);
        });
        this._dataChannel.addEventListener('close', () => {
            if (this._closed) {
                return;
            }
            logger.warn('DataChannel "close" event');
            this._closed = true;
            this.emit('@close');
            this.safeEmit('close');
        });
        this._dataChannel.addEventListener('message', () => {
            if (this._closed) {
                return;
            }
            logger.warn('DataChannel "message" event in a DataProducer, message discarded');
        });
        this._dataChannel.addEventListener('bufferedamountlow', () => {
            if (this._closed) {
                return;
            }
            this.safeEmit('bufferedamountlow');
        });
    }
}
exports.DataProducer = DataProducer;