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//
// CustomListRepository.swift
// MullvadVPN
//
// Created by Mojgan on 2024-01-25.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import Combine
import Foundation
import MullvadLogging
import MullvadTypes
public enum CustomRelayListError: LocalizedError, Hashable {
case duplicateName
case nameTooLong
public var errorDescription: String? {
switch self {
case .duplicateName:
NSLocalizedString("Name is already taken.", comment: "")
case .nameTooLong:
String(
format: NSLocalizedString("Name should be no longer than %i characters.", comment: ""),
NameInputFormatter.maxLength
)
}
}
}
public struct CustomListRepository: CustomListRepositoryProtocol {
private let logger = Logger(label: "CustomListRepository")
private let settingsParser: SettingsParser = {
SettingsParser(decoder: JSONDecoder(), encoder: JSONEncoder())
}()
public init() {}
public func save(list: CustomList) throws {
guard list.name.count <= NameInputFormatter.maxLength else {
throw CustomRelayListError.nameTooLong
}
var lists = fetchAll()
var list = list
list.name = list.name.trimmingCharacters(in: .whitespaces)
if let listWithSameName = lists.first(where: { $0.name.compare(list.name) == .orderedSame }),
listWithSameName.id != list.id
{
throw CustomRelayListError.duplicateName
} else if let index = lists.firstIndex(where: { $0.id == list.id }) {
lists[index] = list
try write(lists)
} else {
lists.append(list)
try write(lists)
}
}
public func delete(id: UUID) {
do {
var lists = fetchAll()
if let index = lists.firstIndex(where: { $0.id == id }) {
lists.remove(at: index)
try write(lists)
}
} catch {
logger.error(error: error)
}
}
public func fetch(by id: UUID) -> CustomList? {
try? read().first(where: { $0.id == id })
}
public func fetchAll() -> [CustomList] {
(try? read()) ?? []
}
}
extension CustomListRepository {
private func read() throws -> [CustomList] {
let data = try SettingsManager.store.read(key: .customRelayLists)
return try settingsParser.parseUnversionedPayload(as: [CustomList].self, from: data)
}
private func write(_ list: [CustomList]) throws {
let data = try settingsParser.produceUnversionedPayload(list)
try SettingsManager.store.write(data, for: .customRelayLists)
}
}
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