function normalize_stringify_options()

in src/internal/qs/stringify.ts [225:307]

• 72 lines of code
• 36 McCabe index (conditional complexity)

function normalize_stringify_options(
  opts: StringifyOptions = defaults,
): NonNullableProperties<Omit<StringifyOptions, 'indices'>> & { indices?: boolean } {
  if (typeof opts.allowEmptyArrays !== 'undefined' && typeof opts.allowEmptyArrays !== 'boolean') {
    throw new TypeError('`allowEmptyArrays` option can only be `true` or `false`, when provided');
  }

  if (typeof opts.encodeDotInKeys !== 'undefined' && typeof opts.encodeDotInKeys !== 'boolean') {
    throw new TypeError('`encodeDotInKeys` option can only be `true` or `false`, when provided');
  }

  if (opts.encoder !== null && typeof opts.encoder !== 'undefined' && typeof opts.encoder !== 'function') {
    throw new TypeError('Encoder has to be a function.');
  }

  const charset = opts.charset || defaults.charset;
  if (typeof opts.charset !== 'undefined' && opts.charset !== 'utf-8' && opts.charset !== 'iso-8859-1') {
    throw new TypeError('The charset option must be either utf-8, iso-8859-1, or undefined');
  }

  let format = default_format;
  if (typeof opts.format !== 'undefined') {
    if (!has.call(formatters, opts.format)) {
      throw new TypeError('Unknown format option provided.');
    }
    format = opts.format;
  }
  const formatter = formatters[format];

  let filter = defaults.filter;
  if (typeof opts.filter === 'function' || is_array(opts.filter)) {
    filter = opts.filter;
  }

  let arrayFormat: StringifyOptions['arrayFormat'];
  if (opts.arrayFormat && opts.arrayFormat in array_prefix_generators) {
    arrayFormat = opts.arrayFormat;
  } else if ('indices' in opts) {
    arrayFormat = opts.indices ? 'indices' : 'repeat';
  } else {
    arrayFormat = defaults.arrayFormat;
  }

  if ('commaRoundTrip' in opts && typeof opts.commaRoundTrip !== 'boolean') {
    throw new TypeError('`commaRoundTrip` must be a boolean, or absent');
  }

  const allowDots =
    typeof opts.allowDots === 'undefined' ?
      !!opts.encodeDotInKeys === true ?
        true
      : defaults.allowDots
    : !!opts.allowDots;

  return {
    addQueryPrefix: typeof opts.addQueryPrefix === 'boolean' ? opts.addQueryPrefix : defaults.addQueryPrefix,
    // @ts-ignore
    allowDots: allowDots,
    allowEmptyArrays:
      typeof opts.allowEmptyArrays === 'boolean' ? !!opts.allowEmptyArrays : defaults.allowEmptyArrays,
    arrayFormat: arrayFormat,
    charset: charset,
    charsetSentinel:
      typeof opts.charsetSentinel === 'boolean' ? opts.charsetSentinel : defaults.charsetSentinel,
    commaRoundTrip: !!opts.commaRoundTrip,
    delimiter: typeof opts.delimiter === 'undefined' ? defaults.delimiter : opts.delimiter,
    encode: typeof opts.encode === 'boolean' ? opts.encode : defaults.encode,
    encodeDotInKeys:
      typeof opts.encodeDotInKeys === 'boolean' ? opts.encodeDotInKeys : defaults.encodeDotInKeys,
    encoder: typeof opts.encoder === 'function' ? opts.encoder : defaults.encoder,
    encodeValuesOnly:
      typeof opts.encodeValuesOnly === 'boolean' ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
    filter: filter,
    format: format,
    formatter: formatter,
    serializeDate: typeof opts.serializeDate === 'function' ? opts.serializeDate : defaults.serializeDate,
    skipNulls: typeof opts.skipNulls === 'boolean' ? opts.skipNulls : defaults.skipNulls,
    // @ts-ignore
    sort: typeof opts.sort === 'function' ? opts.sort : null,
    strictNullHandling:
      typeof opts.strictNullHandling === 'boolean' ? opts.strictNullHandling : defaults.strictNullHandling,
  };
}