Function normalize_options

packages/csv-parse/lib/api/normalize_options.js:6–760

(opts)

import { is_object } from "../utils/is_object.js";

const normalize_options = function (opts) {
  const options = {};
  // Merge with user options
  for (const opt in opts) {
    options[underscore(opt)] = opts[opt];
  }
  // Normalize option `encoding`
  // Note: defined first because other options depends on it
  // to convert chars/strings into buffers.
  if (options.encoding === undefined || options.encoding === true) {
    options.encoding = "utf8";
  } else if (options.encoding === null || options.encoding === false) {
    options.encoding = null;
  } else if (
    typeof options.encoding !== "string" &&
    options.encoding !== null
  ) {
    throw new CsvError(
      "CSV_INVALID_OPTION_ENCODING",
      [
        "Invalid option encoding:",
        "encoding must be a string or null to return a buffer,",
        `got ${JSON.stringify(options.encoding)}`,
      ],
      options,
    );
  }
  // Normalize option `bom`
  if (
    options.bom === undefined ||
    options.bom === null ||
    options.bom === false
  ) {
    options.bom = false;
  } else if (options.bom !== true) {
    throw new CsvError(
      "CSV_INVALID_OPTION_BOM",
      [
        "Invalid option bom:",
        "bom must be true,",
        `got ${JSON.stringify(options.bom)}`,
      ],
      options,
    );
  }
  // Normalize option `cast`
  options.cast_function = null;
  if (
    options.cast === undefined ||
    options.cast === null ||
    options.cast === false ||
    options.cast === ""
  ) {
    options.cast = undefined;
  } else if (typeof options.cast === "function") {
    options.cast_function = options.cast;
    options.cast = true;
  } else if (options.cast !== true) {