How to masking textfield in Swift 4?

Question

I want masking email in textfield.text, but I only get the value in the middle. I want to get the value from the middle to @ gmail.com like example below.

ex:

1. let var = [email protected]

output = ****[email protected]

2. let var = [email protected]

output = ****[email protected]

    let email = "[email protected]"

    let components = email.components(separatedBy: "@")

    let result = hideMidChars(components.first!) + "@" + components.last!

    print(result)

output I get: ****5****@gmail.com

my expectations: ****[email protected]

Answer 1

func hide(email: String) -> String {

    let parts = email.split(separator: "@")
    if parts.count < 2 {
        return email
    }
    let name = parts[0]
    let appendix = parts[1]
    let lenght = name.count
    if lenght == 1 {
        return "*@\(appendix)"
    }
    let semiLenght = lenght / 2

    var suffixSemiLenght = semiLenght
    if (lenght % 2 == 1) {
        suffixSemiLenght += 1
    }

    let prefix = String(repeating: "*", count: semiLenght)
    let lastPart = String(name.suffix(suffixSemiLenght))

    let result = "\(prefix)\(lastPart)@\(appendix)"
    return result
}
let email = "[email protected]"
let result = hide(email: email)
print(result)