obscureString method

String obscureString(String input)

Obscures sensitive string data by showing only partial characters.

For strings with 3+ characters: shows first 3 and last 2 characters. For shorter strings: shows first and last character. Single character strings are returned unchanged.

Implementation

String obscureString(String input) {
  final int length = input.length;

  // If the string is less than 5 characters, show only the first and last character
  if (length < 3) {
    if (length == 1) {
      return input; // If the string is a single character, return it as is
    }
    return input[0] + '*' * (length - 2) + input[length - 1];
  }

  // For strings with 5 or more characters, show the first 3 and last 2 characters
  return " ${input.substring(0, 3)}${'*' * (length - 5)}${input.substring(length - 2)}";
}