node-aurora/lib/AuroraCmdWriteFile.js

Provides an interface to the Aurora Dreamband.

'use strict';

var _promise = require('babel-runtime/core-js/promise');

var _promise2 = _interopRequireDefault(_promise);

var _stream = require('stream');

var _stream2 = _interopRequireDefault(_stream);

var _bufferCrc = require('buffer-crc32');

var _bufferCrc2 = _interopRequireDefault(_bufferCrc);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

module.exports = function (destPath, dataOrReadStream) {
    var _this = this;

    var rename = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
    var connector = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 'any';


    var destPathSegments = destPath.split('/');

    var destFileName = destPathSegments.pop();
    var destFileDir = destPathSegments.length ? destPathSegments.join('/') : '/';

    var crc = void 0;
    var stream = dataOrReadStream;

    //convert to stream in case of string or buffer
    if (typeof dataOrReadStream == 'string' || Buffer.isBuffer(dataOrReadStream)) {

        stream = new _stream2.default.Readable();
        stream._read = function () {};
        stream.push(dataOrReadStream.toString());
        stream.push(null);
    }

    stream.pause();
    stream.on('data', function (chunk) {
        crc = _bufferCrc2.default.unsigned(chunk, crc);
    });

    return this.queueCmd('sd-file-write ' + destFileName + ' ' + destFileDir + ' ' + (rename ? 1 : 0) + ' 1 500', connector, function (cmd) {

        _this.once('cmdInputRequested', function (inputStream) {
            stream.pipe(inputStream);
            stream.resume();
        });
    }).then(function (cmdWithResponse) {

        if (cmdWithResponse.response.crc != crc) return _promise2.default.reject('CRC failed.');

        return cmdWithResponse;
    });
};