isLatLong.js 955 B

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  1. import assertString from './util/assertString';
  2. import merge from './util/merge';
  3. import includes from './util/includesString';
  4. var lat = /^\(?[+-]?(90(\.0+)?|[1-8]?\d(\.\d+)?)$/;
  5. var _long = /^\s?[+-]?(180(\.0+)?|1[0-7]\d(\.\d+)?|\d{1,2}(\.\d+)?)\)?$/;
  6. var latDMS = /^(([1-8]?\d)\D+([1-5]?\d|60)\D+([1-5]?\d|60)(\.\d+)?|90\D+0\D+0)\D+[NSns]?$/i;
  7. var longDMS = /^\s*([1-7]?\d{1,2}\D+([1-5]?\d|60)\D+([1-5]?\d|60)(\.\d+)?|180\D+0\D+0)\D+[EWew]?$/i;
  8. var defaultLatLongOptions = {
  9. checkDMS: false
  10. };
  11. export default function isLatLong(str, options) {
  12. assertString(str);
  13. options = merge(options, defaultLatLongOptions);
  14. if (!includes(str, ',')) return false;
  15. var pair = str.split(',');
  16. if (pair[0].startsWith('(') && !pair[1].endsWith(')') || pair[1].endsWith(')') && !pair[0].startsWith('(')) return false;
  17. if (options.checkDMS) {
  18. return latDMS.test(pair[0]) && longDMS.test(pair[1]);
  19. }
  20. return lat.test(pair[0]) && _long.test(pair[1]);
  21. }