public static bool TryParse(DiscoDataContext Database, string UniqueIdentifier, out DocumentUniqueIdentifier Identifier)
{
if (IsDocumentUniqueIdentifier(UniqueIdentifier))
{
var components = UniqueIdentifier.Split('|');
// Version 0, Version 1 Handling
if ((components.Length == 7 || components.Length == 6) &&
(components[1].Equals("1", StringComparison.Ordinal) || components[1].Equals("AT", StringComparison.OrdinalIgnoreCase)))
{
var documentTemplateId = components[2];
var targetId = components[3];
var creatorId = components[4];
var timeStamp = DateTime.Parse(components[5]);
var page = 0;
if (components.Length == 7)
{
page = int.Parse(components[6]);
}
Identifier = new DocumentUniqueIdentifier(Database, 1, -1, documentTemplateId, targetId, creatorId, timeStamp, page, null);
return true;
}
}
Identifier = null;
return false;
}
public static bool TryParse(DiscoDataContext Database, byte[] Data, out DocumentUniqueIdentifier Identifier)
{
if (IsDocumentUniqueIdentifier(Data))
{
// first 4 bit indicate version
var version = Data[1] >> 4;
// Version 2
if (version == 2)
{
// Byte | Meaning
// 0 | magic number = 0xC4
// 1 | bits 0-3 = version;
// | 4 = flag: has document template id
// | 5-6 = (01 = device attachment, 10 = job attachment, 11 = user attachment)
// | 7 = not used
// 2-3 | deployment checksum (int16)
// 4-7 | timestamp (uint32 unix epoch)
// 8-9 | page index (uint16)
// 10 | creator id encoded
// ? | target id encoded
// ? | document template id encoded (optional based on flag)
// read flags
var flags = Data[1] & 0x0F;
// read deployment checksum
short deploymentChecksum = (short)((Data[2] << 8) | Data[3]);
// read timestamp
var timeStampEpoch = ((long)Data[4] << 24) |
((long)Data[5] << 16) |
((long)Data[6] << 8) |
Data[7];
// write page index
var pageIndex = (Data[8] << 8) | Data[9];
var position = 10;
// write creator id
var creatorId = DocumentUniqueIdentifierExtensions.BinaryDecode(Data, position, out position);
// write target id
var targetId = DocumentUniqueIdentifierExtensions.BinaryDecode(Data, position, out position);
// write document template id
string documentTemplateId = null;
// Has document template id flag
if ((flags & 0x8) == 0x8)
{
documentTemplateId = DocumentUniqueIdentifierExtensions.BinaryDecode(Data, position, out position);
}
AttachmentTypes? attachmentType = null;
switch (flags & 0x6)
{
case 0x2:
attachmentType = AttachmentTypes.Device;
break;
case 0x4:
attachmentType = AttachmentTypes.Job;
break;
case 0x6:
attachmentType = AttachmentTypes.User;
break;
}
var timeStamp = DateTime.FromFileTimeUtc(116444736000000000L).AddTicks(TimeSpan.TicksPerSecond * timeStampEpoch).ToLocalTime();
Identifier = new DocumentUniqueIdentifier(Database, version, deploymentChecksum, documentTemplateId, targetId, creatorId, timeStamp, pageIndex, attachmentType);
return true;
}
}
Identifier = null;
return false;
}
public static DocumentUniqueIdentifier Create(DiscoDataContext Database, DocumentTemplate DocumentTemplate, IAttachmentTarget Target, User Creator, DateTime TimeStamp, int PageIndex)
{
var deploymentChecksum = Database.DiscoConfiguration.DeploymentChecksum;
var documentTemplateId = DocumentTemplate.Id;
var targetId = Target.AttachmentReferenceId;
var creatorId = Creator.UserId;
var attachmentType = DocumentTemplate.AttachmentType;
var identifier = new DocumentUniqueIdentifier(Database, CurrentVersion, deploymentChecksum, documentTemplateId, targetId, creatorId, TimeStamp, PageIndex, attachmentType);
identifier.documentTemplate = DocumentTemplate;
identifier.target = Target;
identifier.creator = Creator;
return identifier;
}