validate method

Future<String?> validate(String text, CdxCommentsLocalizations loc, { int maxLines = 10, int maxLength = 400, })

Validates comment text according to all rules.

Checks the text for:

• Empty content
• Maximum line count (default: 10)
• Maximum character length (default: 400)
• Dangerous content (XSS, SQL injection, etc.)
• Bad words

text is the comment text to validate. loc is the CdxCommentsLocalizations instance for error messages. maxLines is the maximum number of lines allowed (default: 10). maxLength is the maximum character length allowed (default: 400).

Returns a localized error message if validation fails, or null if valid.

Example:

final error = await validator.validate(
  'This is a comment',
  localizations,
  maxLines: 5,
  maxLength: 200,
);
if (error != null) {
  print('Validation error: $error');
}

Implementation

Future<String?> validate(String text, CdxCommentsLocalizations loc, {int maxLines = 10, int maxLength = 400}) async {
  if (text.trim().isEmpty) return loc.comment_empty;
  if (text.split('\n').length > maxLines) {
    return loc.comment_too_many_lines(maxLines);
  }
  if (text.length > maxLength) {
    return loc.comment_too_long(maxLength);
  }
  if (containsDangerousContent(text)) {
    return loc.comment_dangerous;
  }
  if (await containsBadWords(text)) {
    return loc.comment_bad_words;
  }
  return null;
}