toPrettyJsonList function

String toPrettyJsonList(dynamic input)

Implementation

String toPrettyJsonList(dynamic input) {
  List<dynamic>? jsonList;

  if (input == null) {
    return '[]';
  }

  if (input is String) {
    if (input.isEmpty) {
      return '[]';
    }
    // If input is a JSON string, decode it into a List
    try {
      jsonList = json.decode(input);
      if (jsonList is! List) {
        //return 'Invalid input type: expected JSON List string';
        return '';
      }
    } catch (e) {
      return '';
      // return 'Error decoding JSON string: $e';
    }
  } else if (input is List) {
    // If input is already a List, use it directly
    jsonList = input;
  } else {
    return '';
  }

  // if (jsonList == null) {
  //   return '[]';
  // }

  try {
    // Use JsonEncoder with 2-space indentation to make the JSON pretty
    const jsonEncoder = JsonEncoder.withIndent('  ');

    // Convert the List object into a pretty JSON string
    return jsonEncoder.convert(jsonList);
  } catch (e) {
    // If there's an error during conversion, return an error message
    // return 'Error converting to JSON: $e';
    return '';
  }
}