cyclon.p2p-rtc-comms/lib/WebRTCComms.js

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
var cyclon_p2p_common_1 = require("cyclon.p2p-common");
var CYCLON_SHUFFLE_CHANNEL_TYPE = 'cyclonShuffle';
var WebRTCComms = /** @class */ (function () {
    function WebRTCComms(rtc, shuffleStateFactory, logger, roomsToJoin) {
        this.rtc = rtc;
        this.shuffleStateFactory = shuffleStateFactory;
        this.logger = logger;
        this.roomsToJoin = roomsToJoin;
        if (!(roomsToJoin && roomsToJoin.length > 0)) {
            throw new Error('Must specify at least one room to join');
        }
    }
    /**
     * Initialize the Comms object
     *
     * @param localNode The local Cyclon node
     * @param metadataProviders
     */
    WebRTCComms.prototype.initialize = function (localNode, metadataProviders) {
        var _this = this;
        this.localNode = localNode;
        this.rtc.connect(metadataProviders, this.roomsToJoin);
        this.rtc.onChannel('cyclonShuffle', function (channel) { return _this.handleIncomingShuffle(channel); });
        this.rtc.on('incomingTimeout', function (channelType, sourcePointer) {
            if (channelType === CYCLON_SHUFFLE_CHANNEL_TYPE) {
                _this.requireLocalNode().emit('shuffleTimeout', 'incoming', sourcePointer);
            }
        });
        this.rtc.on('incomingError', function (channelType, sourcePointer, error) {
            if (channelType === CYCLON_SHUFFLE_CHANNEL_TYPE) {
                _this.logger.error('An error occurred on an incoming shuffle', error);
                _this.requireLocalNode().emit('shuffleError', 'incoming', sourcePointer, error);
            }
        });
        this.rtc.on('offerReceived', function (channelType, sourcePointer) {
            if (channelType === CYCLON_SHUFFLE_CHANNEL_TYPE) {
                _this.logger.debug("Incoming shuffle starting with " + sourcePointer.id);
                _this.requireLocalNode().emit('shuffleStarted', 'incoming', sourcePointer);
            }
        });
    };
    /**
     * Send a shuffle request to another node
     *
     * @param destinationNodePointer
     * @param shuffleSet
     */
    WebRTCComms.prototype.sendShuffleRequest = function (destinationNodePointer, shuffleSet) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this.lastShuffleNode = destinationNodePointer;
                        return [4 /*yield*/, this.createOutgoingShuffle(this.shuffleStateFactory.createOutgoingShuffleState(this.requireLocalNode(), destinationNodePointer, shuffleSet), destinationNodePointer)];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    WebRTCComms.prototype.createOutgoingShuffle = function (outgoingState, destinationNodePointer) {
        return __awaiter(this, void 0, void 0, function () {
            var channel;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        _a.trys.push([0, , 4, 5]);
                        return [4 /*yield*/, this.rtc.openChannel(CYCLON_SHUFFLE_CHANNEL_TYPE, destinationNodePointer)];
                    case 1:
                        channel = _a.sent();
                        outgoingState.storeChannel(channel);
                        outgoingState.sendShuffleRequest();
                        return [4 /*yield*/, outgoingState.processShuffleResponse()];
                    case 2:
                        _a.sent();
                        return [4 /*yield*/, outgoingState.sendResponseAcknowledgement()];
                    case 3:
                        _a.sent();
                        return [3 /*break*/, 5];
                    case 4:
                        outgoingState.close();
                        return [7 /*endfinally*/];
                    case 5: return [2 /*return*/];
                }
            });
        });
    };
    WebRTCComms.prototype.createNewPointer = function () {
        return this.rtc.createNewPointer();
    };
    WebRTCComms.prototype.getLocalId = function () {
        return this.rtc.getLocalId();
    };
    /**
     * Handle an incoming shuffle
     */
    WebRTCComms.prototype.handleIncomingShuffle = function (channel) {
        return __awaiter(this, void 0, void 0, function () {
            var remotePeer, incomingShuffleState, e_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        remotePeer = channel.getRemotePeer();
                        incomingShuffleState = this.shuffleStateFactory.createIncomingShuffleState(this.requireLocalNode(), remotePeer);
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 4, 5, 6]);
                        return [4 /*yield*/, incomingShuffleState.processShuffleRequest(channel)];
                    case 2:
                        _a.sent();
                        return [4 /*yield*/, incomingShuffleState.waitForResponseAcknowledgement(channel)];
                    case 3:
                        _a.sent();
                        this.requireLocalNode().emit('shuffleCompleted', 'incoming', remotePeer);
                        return [3 /*break*/, 6];
                    case 4:
                        e_1 = _a.sent();
                        if (e_1 instanceof cyclon_p2p_common_1.TimeoutError) {
                            this.logger.warn(e_1.message);
                            this.requireLocalNode().emit('shuffleTimeout', 'incoming', remotePeer);
                        }
                        else {
                            this.logger.error('An unknown error occurred on an incoming shuffle', e_1);
                            this.requireLocalNode().emit('shuffleError', 'incoming', remotePeer, 'unknown');
                        }
                        return [3 /*break*/, 6];
                    case 5:
                        channel.close();
                        return [7 /*endfinally*/];
                    case 6: return [2 /*return*/];
                }
            });
        });
    };
    WebRTCComms.prototype.requireLocalNode = function () {
        if (this.localNode) {
            return this.localNode;
        }
        else {
            throw new Error('Comms not yet initialized (localNode is not defined)');
        }
    };
    return WebRTCComms;
}());
exports.WebRTCComms = WebRTCComms;
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