extractZoomLevel static method

int? extractZoomLevel(String url)

Extracts zoom level from a Google Maps URL.

This method parses the given URL and attempts to extract the zoom level information embedded within it.

Returns the zoom level as an integer if found, null otherwise.

Example usage:

final url = 'https://www.google.com/maps/@37.7749,-122.4194,15z';
final zoom = GoogleMapsUrlExtractor.extractZoomLevel(url);
if (zoom != null) {
  print('Zoom level: $zoom');
}

Implementation

static int? extractZoomLevel(String url) {
  // Pattern 1: @lat,lng,zoom format
  var regex = RegExp(r'@-?\d+\.?\d*,-?\d+\.?\d*,(\d+)z?');
  var match = regex.firstMatch(url);
  if (match != null) {
    return int.parse(match.group(1)!);
  }

  // Pattern 2: zoom parameter in query string
  regex = RegExp(r'[?&]z=(\d+)');
  match = regex.firstMatch(url);
  if (match != null) {
    return int.parse(match.group(1)!);
  }

  return null;
}