52 lines
847 B
JavaScript
52 lines
847 B
JavaScript
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'use strict';
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const PassThrough = require('stream').PassThrough;
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module.exports = opts => {
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opts = Object.assign({}, opts);
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const array = opts.array;
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let encoding = opts.encoding;
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const buffer = encoding === 'buffer';
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let objectMode = false;
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if (array) {
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objectMode = !(encoding || buffer);
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} else {
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encoding = encoding || 'utf8';
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}
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if (buffer) {
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encoding = null;
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}
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let len = 0;
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const ret = [];
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const stream = new PassThrough({objectMode});
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if (encoding) {
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stream.setEncoding(encoding);
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}
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stream.on('data', chunk => {
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ret.push(chunk);
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if (objectMode) {
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len = ret.length;
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} else {
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len += chunk.length;
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}
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});
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stream.getBufferedValue = () => {
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if (array) {
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return ret;
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}
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return buffer ? Buffer.concat(ret, len) : ret.join('');
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};
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stream.getBufferedLength = () => len;
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return stream;
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};
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