private string BuildUnlockCode(byte[] codeByte)
{
string hash = EncDecHelper.MD5(codeByte);
string code = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(hash)).ToUpper();
for (int i = 1; i < 4; i++)
{
code = code.Insert(i * 8 + (i - 1), "-");
}
return(code);
}
/// <summary>
/// Crea o aggiorna il file della cache
/// </summary>
public async Task WriteCache()
{
try
{
JObject json = new JObject
{
{ "version", CurrentVersionSettings }
};
JArray productsJson = new JArray();
foreach (ProductCache item in ProductsList)
{
JObject jsonProd = new JObject
{
{ nameof(item.Id), item.Id },
{ nameof(item.Purchased), item.Purchased },
{ nameof(item.Unlocked), item.Unlocked },
{ nameof(item.UnlockCode), item.UnlockCode },
{ nameof(item.UnlockCodeExpire), item.UnlockCodeExpire }
};
productsJson.Add(jsonProd);
}
json.Add("products", productsJson);
string content = json.ToString();
EncDecHelper enc = new EncDecHelper
{
PasswordString = Password
};
StreamWriter streamWriter = new StreamWriter(AppCacheFileName, false);
await streamWriter.WriteAsync(enc.AESEncrypt(content));
streamWriter.Close();
}
catch (Exception ex)
{
Debug.WriteLine("CacheManager error on write: " + ex.Message);
}
}
/// <summary>
/// Legge i dati presenti in cache
/// </summary>
/// <returns></returns>
public async Task ReadCache()
{
ProductsList.Clear();
try
{
StreamReader streamReader = new StreamReader(AppCacheFileName);
string content = await streamReader.ReadToEndAsync();
streamReader.Close();
if (string.IsNullOrEmpty(content))
{
await WriteCache();
return;
}
EncDecHelper enc = new EncDecHelper
{
PasswordString = Password
};
string json = enc.AESDecrypt(content, out bool warning);
if (warning)
{
Debug.WriteLine("CacheManager read: warning in file reading");
}
JObject jObject = JObject.Parse(json);
if (Utility.SafeTryGetJSONString(jObject, "version", out string version))
{
Debug.WriteLine("CacheManager file version " + version);
}
if (Utility.SafeTryGetJSON(jObject, "products", out JToken productsToken))
{
JArray products = productsToken.ToObject <JArray>();
foreach (JObject item in products)
{
ProductCache product = new ProductCache
{
Id = item[nameof(ProductCache.Id)].ToString(),
Purchased = item[nameof(ProductCache.Purchased)].ToObject <bool>()
};
// Dalla versione 1.1.0 ho il codice di sblocco della versioen PLUS
if (CompareVersions(version, "1.1.0") >= 0)
{
product.Unlocked = item[nameof(ProductCache.Unlocked)].ToObject <bool>();
product.UnlockCode = item[nameof(ProductCache.UnlockCode)].ToObject <string>();
product.UnlockCodeExpire = item[nameof(ProductCache.UnlockCodeExpire)].ToObject <bool>();
}
ProductsList.Add(product);
}
}
}
catch (FileNotFoundException)
{
// Ok. Genera il file
await WriteCache();
}
catch (Exception ex)
{
Debug.WriteLine("CacheManager error on read: " + ex.Message);
}
}