passepartout-apple/Passepartout/App/Reusable/Validators.swift

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2022-04-12 13:09:14 +00:00
//
// Validators.swift
// Passepartout
//
// Created by Davide De Rosa on 3/31/22.
// 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 Foundation
struct Validators {
enum ValidationError: Error {
case notSet
case empty
case ipAddress
case domainName
case url
}
static func notNil(_ string: String?) throws {
guard let _ = string else {
throw ValidationError.notSet
}
}
static func notEmpty(_ string: String) throws {
let valid = string.trimmingCharacters(in: .whitespacesAndNewlines)
guard !valid.isEmpty else {
throw ValidationError.empty
}
}
static func ipAddress(_ string: String) throws {
var sin = sockaddr_in()
var sin6 = sockaddr_in6()
if string.withCString({ cstring in inet_pton(AF_INET6, cstring, &sin6.sin6_addr) }) == 1 {
return
}
if string.withCString({ cstring in inet_pton(AF_INET, cstring, &sin.sin_addr) }) == 1 {
return
}
throw ValidationError.ipAddress
}
private static let rxDomainName = NSRegularExpression("^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.)+[A-Za-z]{2,6}$")
static func domainName(_ string: String) throws {
guard rxDomainName.numberOfMatches(in: string, options: [], range: .init(location: 0, length: string.count)) > 0 else {
throw ValidationError.domainName
}
}
static func url(_ string: String) throws {
guard let _ = URL(string: string) else {
throw ValidationError.url
}
}
}