source: trip-planner-front/node_modules/get-stream/index.js@ 76712b2

'use strict';
const pump = require('pump');
const bufferStream = require('./buffer-stream');

class MaxBufferError extends Error {
        constructor() {
                super('maxBuffer exceeded');
                this.name = 'MaxBufferError';
        }
}

function getStream(inputStream, options) {
        if (!inputStream) {
                return Promise.reject(new Error('Expected a stream'));
        }

        options = Object.assign({maxBuffer: Infinity}, options);

        const {maxBuffer} = options;

        let stream;
        return new Promise((resolve, reject) => {
                const rejectPromise = error => {
                        if (error) { // A null check
                                error.bufferedData = stream.getBufferedValue();
                        }
                        reject(error);
                };

                stream = pump(inputStream, bufferStream(options), error => {
                        if (error) {
                                rejectPromise(error);
                                return;
                        }

                        resolve();
                });

                stream.on('data', () => {
                        if (stream.getBufferedLength() > maxBuffer) {
                                rejectPromise(new MaxBufferError());
                        }
                });
        }).then(() => stream.getBufferedValue());
}

module.exports = getStream;
module.exports.buffer = (stream, options) => getStream(stream, Object.assign({}, options, {encoding: 'buffer'}));
module.exports.array = (stream, options) => getStream(stream, Object.assign({}, options, {array: true}));
module.exports.MaxBufferError = MaxBufferError;