Validation Create and Compose using 'folktale/validation' library

validation.js

const {Success, Failure} = require('folktale/validation');
 


const create = (predicate, failure = _ => _) => {

    return function (value) {

        if (predicate(value)) {
            return Success(value)
        } else {
            return Failure([failure(value)]);
        }
    }
};

const compose = (...rules) => {
    return function (value) {
        return rules.reduce((prev, curr) => {
            return prev.concat(curr(value));
        }, Success()).map(_ => value);
    }
};


const isPasswordLongEnough = create(password => password.length > 6);
const isPasswordStrongEnough = create(password => /[\W]/.test(password), password => `${password} is not strong enough`);
var password = "34567890";

const isPasswordValid = compose(isPasswordLongEnough, isPasswordStrongEnough);
console.log("isPasswordLongEnough", isPasswordLongEnough(password));


// console.log("isPasswordValid", isPasswordValid(password));

isPasswordValid(password).fold(errors => {
    console.log("fold KO", errors);
}, value => {
    console.log("fold OK", value)
})