DataSourceCallback typedef

DataSourceCallback = Future Function({dynamic body, Map<String, String>? headers, required String method, required String url})

Callback for fetching data from external sources (APIs, databases, etc.)

This allows the package user to implement their own data fetching logic for DataSource components without forcing a specific HTTP client dependency.

Parameters:

• url: The URL or endpoint to fetch data from
• method: HTTP method (GET, POST, etc.)
• headers: Optional map of headers to include in the request
• body: Optional request body for POST/PUT requests

Returns:

• A Future that resolves to the fetched data (typically Map or List)

Example implementation:

Future<dynamic> myDataFetcher({
  required String url,
  required String method,
  Map<String, String>? headers,
  dynamic body,
}) async {
  final response = await http.get(Uri.parse(url), headers: headers);
  if (response.statusCode == 200) {
    return json.decode(response.body);
  }
  throw Exception('Failed to fetch data');
}

Implementation

typedef DataSourceCallback = Future<dynamic> Function({
  required String url,
  required String method,
  Map<String, String>? headers,
  dynamic body,
});