ios/MullvadVPN/Extensions/String+Helpers.swift


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//
//  String+Helpers.swift
//  MullvadVPN
//
//  Created by pronebird on 27/03/2020.
//  Copyright © 2020 Mullvad VPN AB. All rights reserved.
//

import UIKit

extension String {
    /// Returns the array of the longest possible subsequences of the given length.
    func split(every length: Int) -> [Substring] {
        guard length > 0 else { return [prefix(upTo: endIndex)] }

        let resultCount = Int((Float(count) / Float(length)).rounded(.up))

        return (0 ..< resultCount)
            .map { dropFirst($0 * length).prefix(length) }
    }

    func width(using font: UIFont) -> CGFloat {
        let fontAttributes = [NSAttributedString.Key.font: font]
        return self.size(withAttributes: fontAttributes).width
    }
}