54 lines
2.0 KiB
Swift
54 lines
2.0 KiB
Swift
//
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// LocalAuthenticationHandler.swift
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// secant-testnet
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//
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// Created by Lukáš Korba on 20.07.2022.
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//
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import Foundation
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import LocalAuthentication
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import ComposableArchitecture
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import Combine
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struct LocalAuthenticationHandler {
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let authenticate: () -> Effect<Result<Bool, Never>, Never>
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}
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/// The `Result` of live implementation of `LocalAuthentication` has been purposely simplified to Never fails (never returns a .failure)
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/// Instead, we care only about `Bool` result of authentication.
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extension LocalAuthenticationHandler {
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enum LocalAuthenticationNotAvailable: Error {}
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static let live = LocalAuthenticationHandler {
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Deferred {
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Future { promise in
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let context = LAContext()
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var error: NSError?
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let reason = "Folowing content requires authentication."
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/// Biometrics validation
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if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) {
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context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, _ in
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promise(.success(success))
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}
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} else {
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/// Biometrics not supported by the device, fallback to passcode
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if context.canEvaluatePolicy(.deviceOwnerAuthentication, error: &error) {
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context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason) { success, _ in
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promise(.success(success))
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}
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} else {
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/// No local authentication available, user's device is not protected, fallback to allow access to sensetive content
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promise(.success(true))
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}
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}
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}
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}
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.catchToEffect()
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}
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static let unimplemented = LocalAuthenticationHandler(
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authenticate: { Effect(value: Result.success(false)) }
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)
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}
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