botframework-streaming/lib/disassemblers/payloadDisassembler.js

Streaming library for the Microsoft Bot Framework

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PayloadDisassembler = void 0;
const subscribableStream_1 = require("../subscribableStream");
/**
 * Base class streaming payload disassembling.
 */
class PayloadDisassembler {
    /**
     * Initializes a new instance of the [PayloadDisassembler](xref:botframework-streaming.PayloadDisassembler) class.
     *
     * @param sender The [PayloadSender](xref:botframework-streaming.PayloadSender) used to send the disassembled payload chunks.
     * @param id The ID of this disassembler.
     */
    constructor(sender, id) {
        this.sender = sender;
        this.id = id;
    }
    /**
     * Serializes the item into the [IStreamWrapper](xref:botframework-streaming.IStreamWrapper) that exposes the stream and length of the result.
     *
     * @param item The item to be serialized.
     * @returns The stream containing the serialized item and the length of the stream.
     */
    static serialize(item) {
        const stream = new subscribableStream_1.SubscribableStream();
        stream.write(JSON.stringify(item));
        stream.end();
        return { stream, streamLength: stream.length };
    }
    /**
     * Begins the process of disassembling a payload and sending the resulting chunks to the [PayloadSender](xref:botframework-streaming.PayloadSender) to dispatch over the transport.
     *
     * @returns A completed Promise after the disassembled payload has been sent.
     */
    disassemble() {
        return __awaiter(this, void 0, void 0, function* () {
            const { stream, streamLength } = yield this.getStream();
            this.stream = stream;
            this.streamLength = streamLength;
            return this.send();
        });
    }
    /**
     * Begins the process of disassembling a payload and signals the [PayloadSender](xref:botframework-streaming.PayloadSender).
     */
    send() {
        return __awaiter(this, void 0, void 0, function* () {
            const header = {
                payloadType: this.payloadType,
                payloadLength: this.streamLength,
                id: this.id,
                end: true,
            };
            this.sender.sendPayload(header, this.stream);
        });
    }
}
exports.PayloadDisassembler = PayloadDisassembler;
//# sourceMappingURL=payloadDisassembler.js.map