aswi2022code-of-duty-gitlab/backend/src/main/java/cz/zcu/kiv/backendapi/validation/EmailValidator.java @ 217cf731

package cz.zcu.kiv.backendapi.validation;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Validator for email
 */
public class EmailValidator implements ConstraintValidator<ValidEmail, String> {
    /**
     * Email string pattern
     */
    private static final String EMAIL_PATTERN = "^[_A-Za-z\\d-+]+(.[_A-Za-z\\d-]+)*@[A-Za-z\\d-]+(.[A-Za-z\\d]+)*(.[A-Za-z]{2,})$";

    /**
     * Email patter
     */
    private static final Pattern PATTERN = Pattern.compile(EMAIL_PATTERN);

    /**
     * Check if email is valid (matches pattern)
     *
     * @param email                      email
     * @param constraintValidatorContext constraint validator context
     * @return true if email is valid, false otherwise
     */
    @Override
    public boolean isValid(final String email, final ConstraintValidatorContext constraintValidatorContext) {
        if (email == null) {
            return false;
        }
        final Matcher matcher = PATTERN.matcher(email);
        return matcher.matches();
    }
}