memstreams/dist/buffer-writer.js

Memory Streams library for JavaScript based on readable-stream

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BufferWriter = void 0;
const readable_stream_1 = require("readable-stream");
const utils_1 = require("./utils");
class BufferWriter extends readable_stream_1.Writable {
    constructor(options = {}) {
        options.objectMode = false;
        super(options);
        this.init();
    }
    init() {
        this._queue = [];
    }
    get queue() {
        return this._queue;
    }
    get data() {
        if (!this._data ||
            this._data.length <
                this._queue.reduce((pre, curr) => pre + curr.length, 0)) {
            this._data = Buffer.concat(this._queue);
        }
        return this._data;
    }
    _write(chunk, encoding, callback) {
        const data = (0, utils_1.chunk2buf)(chunk, encoding);
        if (this.listenerCount('write')) {
            this.emit('write', data);
        }
        else {
            this._queue.push(data);
        }
        callback();
    }
    forward(destination, options) {
        const forward = (data) => destination.push(data);
        this.on('write', forward);
        if (!options || options.end) {
            this.once('finish', () => this.removeListener('data', forward));
        }
        return destination;
    }
}
exports.BufferWriter = BufferWriter;
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