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//
// RESTError.swift
// RESTError
//
// Created by pronebird on 27/07/2021.
// Copyright © 2021 Mullvad VPN AB. All rights reserved.
//
import Foundation
extension REST {
/// An error type returned by `REST.Client`
enum Error: ChainedError {
/// A failure to encode the payload
case encodePayload(Swift.Error)
/// A failure during networking
case network(URLError)
/// A failure reported by server
case server(REST.ServerErrorResponse)
/// A failure to decode the error response from server
case decodeErrorResponse(Swift.Error)
/// A failure to decode the success response from server
case decodeSuccessResponse(Swift.Error)
var errorDescription: String? {
switch self {
case .encodePayload:
return "Failure to encode the payload"
case .network:
return "Network error"
case .server:
return "Server error"
case .decodeErrorResponse:
return "Failure to decode error response from server"
case .decodeSuccessResponse:
return "Failure to decode success response from server"
}
}
}
/// A struct that represents a server response in case of error (any HTTP status code except 2xx).
struct ServerErrorResponse: LocalizedError, Decodable, Equatable {
/// A list of known server error codes
enum Code: String, Equatable {
case invalidAccount = "INVALID_ACCOUNT"
case keyLimitReached = "KEY_LIMIT_REACHED"
case pubKeyNotFound = "PUBKEY_NOT_FOUND"
static func ~= (pattern: Self, value: REST.ServerErrorResponse) -> Bool {
return pattern.rawValue == value.code
}
}
static var invalidAccount: Code {
return .invalidAccount
}
static var keyLimitReached: Code {
return .keyLimitReached
}
static var pubKeyNotFound: Code {
return .pubKeyNotFound
}
let code: String
let error: String?
var errorDescription: String? {
switch code {
case Code.keyLimitReached.rawValue:
return NSLocalizedString(
"KEY_LIMIT_REACHED_ERROR_DESCRIPTION",
tableName: "RESTClient",
value: "Too many WireGuard keys in use.",
comment: ""
)
case Code.invalidAccount.rawValue:
return NSLocalizedString(
"INVALID_ACCOUNT_ERROR_DESCRIPTION",
tableName: "RESTClient",
value: "Invalid account.",
comment: ""
)
default:
return nil
}
}
var recoverySuggestion: String? {
switch code {
case Code.keyLimitReached.rawValue:
return NSLocalizedString(
"KEY_LIMIT_REACHED_ERROR_RECOVERY_SUGGESTION",
tableName: "RESTClient",
value: "Please visit the website to revoke a key before login is possible.",
comment: ""
)
default:
return nil
}
}
static func == (lhs: Self, rhs: Self) -> Bool {
return lhs.code == rhs.code
}
}
}
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