passepartout-apple/Passepartout/App/Reusable/Binding+Extensions.swift

//
//  Binding+Extensions.swift
//  Passepartout
//
//  Created by Davide De Rosa on 2/19/22.
//  Copyright (c) 2022 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Passepartout is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import SwiftUI

func ??<T>(lhs: Binding<Optional<T>>, rhs: T) -> Binding<T> {
    Binding {
        lhs.wrappedValue ?? rhs
    } set: {
        lhs.wrappedValue = $0
    }
}

extension Binding {
    func toString() -> Binding<String> where Value == Optional<URL> {
        .init {
            wrappedValue?.absoluteString ?? ""
        } set: {
            wrappedValue = URL(string: $0) ?? wrappedValue
        }
    }
    
    func toString<T>() -> Binding<String> where Value == Optional<T>, T: FixedWidthInteger {
        .init {
            guard let v = wrappedValue else {
                return ""
            }
            return v.description
        } set: {
            guard let v = T($0) else {
                return
            }
            wrappedValue = v
        }
    }
}