Validate likes string before parsing to Integer

[devanfibio]

Description

Add validation to the likes string parser to handle edge cases where no digits are found in the input.

The parser now checks if the processed string is null or empty before attempting to parse it with Integer.parseInt(). If validation fails, a descriptive ParsingException is thrown instead of allowing a NumberFormatException to propagate.

This provides clearer error messages and prevents unexpected exceptions during parsing.

Changes

• Extract the result of Utils.removeNonDigitCharacters() into a variable
• Validate that the result is not null and not empty
• Throw a descriptive ParsingException if validation fails
• Parse the validated string with Integer.parseInt()

Before

return Integer.parseInt(Utils.removeNonDigitCharacters(likesString));

After

final String digits = Utils.removeNonDigitCharacters(likesString);
if (digits == null || digits.isEmpty()) {
    throw new ParsingException("Could not parse \"" + likesString + "\": no digits found");
}
return Integer.parseInt(digits);

Benefits

• Clear error messages that help users identify parsing issues
• Improved code readability with extracted variable