le-mystere-professeur-zacus/apps/zacus-hub/Sources/Shared/KeychainStore.swift

import Foundation
import Security

enum KeychainStore {
    private static let service = "cc.saillant.zacus.hub"
    private static let account = "gateway-token"

    static func token() -> String? {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrService as String: service,
            kSecAttrAccount as String: account,
            kSecReturnData as String: true,
            kSecMatchLimit as String: kSecMatchLimitOne
        ]
        var item: CFTypeRef?
        guard SecItemCopyMatching(query as CFDictionary, &item) == errSecSuccess,
              let data = item as? Data,
              let value = String(data: data, encoding: .utf8) else { return nil }
        return value
    }

    @discardableResult
    static func setToken(_ value: String) -> Bool {
        let data = Data(value.utf8)
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrService as String: service,
            kSecAttrAccount as String: account
        ]
        SecItemDelete(query as CFDictionary)
        guard !value.isEmpty else { return true }
        var attrs = query
        attrs[kSecValueData as String] = data
        return SecItemAdd(attrs as CFDictionary, nil) == errSecSuccess
    }
}