AngularJS three out of four validations

Question

I'm trying to validate password, but i have a problem. For now, I have an input with next validators:

<form name="RegisterForm">
    <input type="password" name="password"
                           ng-minlength="8"
                           ng-maxlength="20"
                           space-restricted
                           numbers-required
                           lowercase-required
                           uppercase-required
                           special-characters-required
                           password-validator
                           required>
</form>

Here is the sample of lowercase validator:

function lowercaseRequired() {
    return {
        require: 'ngModel',
        restrict: 'A',
        link: link
    };
}

function link(scope, element, attrs, ngModel) {
    ngModel.$parsers.unshift(function(value) {
        var validationPattern = /(?=.*[a-z])|^$/,
            isValid = validationPattern.test(value);

        ngModel.$setValidity('lowercaseRequired', isValid);
        return isValid ? value : undefined;

}

How i can handle minimum three out of four validations?

lowercase
uppercase
special characters
numbers

I thought about big regexp, but it was a bad idea, I think. As a result, I need to get a password that contains : min 8 chars, max 20 chars, doesn't contain whitespaces, and contains minimum three out of four validations.

this help you https://stackoverflow.com/questions/48635152/regex-for-default-asp-net-core-identity-password/48636105#48636105 — Mohammad Javad Noori, Feb 15 '18 at 21:34
@withrp you may benefit from [Reference -Password Validation](https://stackoverflow.com/q/48345922) — ctwheels, Feb 17 '18 at 00:43

Ihor Yanovchyk · Accepted Answer · 2018-02-15T22:59:39.307

Here is the answer: ^((?=.*[\d])(?=.*[a-z])(?=.*[A-Z])|(?=.*[a-z])(?=.*[A-Z])(?=.*[^\w\d\s])|(?=.*[\d])(?=.*[A-Z])(?=.*[^\w\d\s])|(?=.*[\d])(?=.*[a-z])(?=.*[^\w\d\s])).{8,20}$

REGEXR

Where:

^ - beginning of line anchor
((?=.*[\d]) - check for digits
(?=.*[a-z]) - check for lower case
(?=.*[A-Z]) - check for upper case
|(?=.*[a-z]) (?=.*[A-Z]) (?=.*[^\w\d\s]) - check for special chars
|(?=.*[\d]) (?=.*[A-Z]) (?=.*[^\w\d\s])|(?=.*[\d]) (?=.*[a-z]) (?=.*[^\w\d\s]))\S{8,20} - match any character ('\S' expect whitespace) from 8 start char at the end 20 of line anchor

AngularJS three out of four validations

1 Answers1