index.js

var GSReader = require('./core/LineReader.js').GS;
var FileWriter = require('./core/Writer.js').File;
var Transformer = require('./core/Transformer.js');

var Gs2File = function(reader, writer) {
  this._reader = reader;
  this._writer = writer;
};

Gs2File.fromGoogleSpreadsheet = function(spreadsheetKey, sheets, credentials) {
  var gs2file = new Gs2File(
    new GSReader(spreadsheetKey, sheets, credentials),
    new FileWriter()
  );

  return gs2file;
};

Gs2File.prototype.setValueCol = function(valueCol) {
  this._defaultValueCol = valueCol;
};

Gs2File.prototype.setKeyCol = function(keyCol) {
  this._defaultKeyCol = keyCol;
};

Gs2File.prototype.setFormat = function(format) {
  this._defaultFormat = format;
};

Gs2File.prototype.setEncoding = function(encoding) {
  this._defaultEncoding = encoding;
};

Gs2File.prototype.save = function(outputPath, opts, cb) {
  console.log('saving ' + outputPath);
  var self = this;

  opts = opts || {};

  var keyCol = opts.keyCol,
    valueCol = opts.valueCol,
    format = opts.format,
    encoding = opts.encoding;

  if (!keyCol) {
    keyCol = this._defaultKeyCol;
  }

  if (!valueCol) {
    valueCol = this._defaultValueCol;
  }

  if (!format) {
    format = this._defaultFormat;
  }

  if (!encoding) {
    encoding = this._defaultEncoding;
    if (!encoding) {
      encoding = 'utf8';
    }
  }

  this._reader.select(keyCol, valueCol).then(function(lines) {
    if (lines) {
      var transformer = Transformer[format || 'android'];
      self._writer.write(outputPath, encoding, lines, transformer, opts);
    }

    if (typeof cb == 'function') {
      cb();
    }
  });
};

module.exports = Gs2File;