buffer-stream.js
df143e4977c6issn4frontend

buffer-stream.js
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			'use strict';
			const {PassThrough: PassThroughStream} = require('stream');

			module.exports = options => {
			options = {...options};

			const {array} = options;
			let {encoding} = options;
			const isBuffer = encoding === 'buffer';
			let objectMode = false;

			if (array) {
			objectMode = !(encoding \|\| isBuffer);
			} else {
			encoding = encoding \|\| 'utf8';
			}

			if (isBuffer) {
			encoding = null;
			}

			const stream = new PassThroughStream({objectMode});

			if (encoding) {
			stream.setEncoding(encoding);
			}

			let length = 0;
			const chunks = [];

			stream.on('data', chunk => {
			chunks.push(chunk);

			if (objectMode) {
			length = chunks.length;
			} else {
			length += chunk.length;
			}
			});

			stream.getBufferedValue = () => {
			if (array) {
			return chunks;
			}

			return isBuffer ? Buffer.concat(chunks, length) : chunks.join('');
			};

			stream.getBufferedLength = () => length;

			return stream;
			};