/// <summary>
/// Decodes a ShGuid
/// </summary>
/// <param name="encodedShGuid">An encoded ShGuid</param>
/// <param name="settings"><see cref="ShGuidSettings"/></param>
/// <returns></returns>
private static byte[] DecodeToByteArray(string encodedShGuid, ShGuidSettings settings)
{
var replaced = encodedShGuid
.Replace(settings.ReplaceSlashWith, '/')
.Replace(settings.ReplacePlusWith, '+');
return(Convert.FromBase64String(replaced + "=="));
}
/// <summary>
/// Encode a stringified guid by converting the guid to byte array, then converting ToBase64String
/// </summary>
/// <param name="stringifiedGuid">A strinigified guid</param>
/// /// <param name="settings"><see cref="ShGuidSettings"/> </param>
/// <returns>A stringified ShGuid</returns>
private string Encode(string stringifiedGuid, ShGuidSettings settings = null)
{
var guid = new Guid(stringifiedGuid);
var shguid = Encode(guid, settings);
return(shguid);
}
/// <summary>
/// Decodes a ShGuid
/// </summary>
/// <param name="encodedShGuid"></param>
/// <param name="settings"><see cref="ShGuidSettings"/> </param>
/// <returns>A ShGuid</returns>
public static ShGuid Decode(string encodedShGuid, ShGuidSettings settings = null)
{
settings = ShGuidSettings.CreateDefaultIfNull(settings);
byte[] buffer = DecodeToByteArray(encodedShGuid, settings);
var decodedGuid = new Guid(buffer);
var shGuid = new ShGuid(decodedGuid, settings);
return(shGuid);
}
/// <summary>
/// Try to parse a Guid and create a ShGuid
/// </summary>
/// <param name="stringifiedGuid">A stringified guid</param>
/// <param name="shGuid">An initialized ShGuid</param>
/// <param name="settings"><see cref="ShGuidSettings"/> </param>
/// <returns><c>true</c> if the initialization was successful</returns>
public static bool TryParse(string stringifiedGuid, out ShGuid shGuid, ShGuidSettings settings = null)
{
shGuid = null;
Guid guid;
if (Guid.TryParse(stringifiedGuid, out guid))
{
shGuid = new ShGuid(guid, settings);
return(true);
}
return(false);
}
/// <summary>
/// Encode a guid by converting the guid to byte array, the converting ToBase64String
/// </summary>
/// <param name="guid"><see cref="Guid"/> </param>
/// <param name="settings"><see cref="ShGuidSettings"/> </param>
/// <returns></returns>
private string Encode(Guid guid, ShGuidSettings settings = null)
{
settings = ShGuidSettings.CreateDefaultIfNull(settings);
string encoded = Convert.ToBase64String(guid.ToByteArray());
encoded = encoded
.Replace('/', settings.ReplaceSlashWith)
.Replace('+', settings.ReplacePlusWith);
if (settings.Trim)
{
return(encoded.Substring(0, 22));
}
return(encoded);
}
/// <summary>
/// Try decode an encoded ShGuid and create a ShGuid
/// </summary>
/// <param name="encodedShGuid">An encoded ShGuid</param>
/// <param name="shGuid">An initialized ShGuid</param>
/// <param name="settings"><see cref="ShGuidSettings"/></param>
/// <returns><c>True</c> if the initialization was successful</returns>
public static bool TryDecode(string encodedShGuid, out ShGuid shGuid, ShGuidSettings settings = null)
{
shGuid = null;
settings = ShGuidSettings.CreateDefaultIfNull(settings);
Guid guid;
try
{
var buffer = DecodeToByteArray(encodedShGuid, settings);
var stringifiedGuid = Encoding.UTF8.GetString(buffer);
guid = new Guid(buffer);
shGuid = new ShGuid(guid, settings);
return(true);
}
catch (FormatException)
{
return(false);
}
}
public static ShGuid NewShGuid(ShGuidSettings settings = null)
{
var guid = Guid.NewGuid();
return(new ShGuid(guid, settings));
}
/// <summary>
/// Creates a ShGuid with a stringified guid
/// </summary>
/// <param name="stringifiedGuid">A stringified guid</param>
/// <param name="settings"><see cref="ShGuidSettings"/> </param>
public ShGuid(string stringifiedGuid, ShGuidSettings settings = null)
{
_guid = new Guid(stringifiedGuid);
_shortGuid = Encode(_guid, settings);
}
/// <summary>
/// Creates a ShGuid
/// </summary>
/// <param name="guid">A guid to initialize ShGuid with</param>
/// <param name="settings"><see cref="ShGuidSettings"/></param>
public ShGuid(Guid guid, ShGuidSettings settings = null)
{
_guid = guid;
_shortGuid = Encode(guid, settings);
}
/// <summary>
/// Creates an empty ShGuid
/// </summary>
public ShGuid(ShGuidSettings settings = null)
{
_guid = Guid.Empty;
_shortGuid = Encode(_guid, settings);
}
