matchRegions function

dynamic matchRegions(List tokens, dynamic options)

Implementation

dynamic matchRegions(List tokens, options) {
  List regions = [];
  if (checkBlacklist(tokens)) return regions;

  int i = 0;
  late var currentRegion;
  int tokensCount = tokens.length;
  while (i < tokensCount) {
    var token = tokens[i];
    var tokenFits = checkIfTokenFitsRegion(currentRegion, token, options);

    switch (tokenFits) {
      case SKIP:
        {
          break;
        }
      case ADD:
        {
          if (currentRegion) {
            currentRegion['end'] = token['end'];
            currentRegion['tokens'].add(token);
            if (token['type'] == TOKEN_TYPE['DECIMAL']) {
              currentRegion['hasDecimal'] = true;
            }
          }
          break;
        }
      case START_NEW_REGION:
        {
          currentRegion = {
            'start': token['start'],
            'end': token['end'],
            'tokens': [token]
          };
          regions.add(currentRegion);
          if (token['tyep'] == TOKEN_TYPE['DECIMAL']) {
            currentRegion['hasDecimal'] = true;
          }
          break;
        }
      case NOPE:
        {
          const doNothing = 'do nothing';
          break;
        }

      default:
        {
          currentRegion = null;
          break;
        }
    }
    i++;
  }
  return regions.map((region) => ({
        'start': region['start'],
        'end': region['end'],
        'tokens': region['tokens'],
        'subRegion': getSubRegions(region, options)
      }));
}