Gary Sharp
453 lines
17 KiB
C#
453 lines
17 KiB
C#
using Disco.Data.Repository;
|
|
using Disco.Models.Repository;
|
|
using Disco.Services.Interop.ActiveDirectory;
|
|
using Newtonsoft.Json;
|
|
using System;
|
|
using System.IO;
|
|
using System.Text;
|
|
|
|
namespace Disco.Services.Documents
|
|
{
|
|
public class DocumentUniqueIdentifier
|
|
{
|
|
private const int CurrentVersion = 2;
|
|
private const byte MagicNumber = 0xC4;
|
|
private DiscoDataContext database;
|
|
|
|
public int Version { get; private set; }
|
|
public short DeploymentChecksum { get; private set; }
|
|
public string DocumentTemplateId { get; private set; }
|
|
public string TargetId { get; private set; }
|
|
public string CreatorId { get; private set; }
|
|
public DateTime TimeStamp { get; private set; }
|
|
public int PageIndex { get; private set; }
|
|
|
|
private DocumentTemplate documentTemplate;
|
|
private AttachmentTypes? attachmentType;
|
|
private IAttachmentTarget target;
|
|
private User creator;
|
|
|
|
public DocumentTemplate DocumentTemplate
|
|
{
|
|
get
|
|
{
|
|
if (documentTemplate == null && !string.IsNullOrWhiteSpace(DocumentTemplateId) && !DocumentTemplateId.StartsWith("--", StringComparison.Ordinal))
|
|
{
|
|
documentTemplate = database.DocumentTemplates.Find(DocumentTemplateId);
|
|
if (documentTemplate != null)
|
|
{
|
|
attachmentType = documentTemplate.AttachmentType;
|
|
DocumentTemplateId = documentTemplate.Id;
|
|
}
|
|
}
|
|
|
|
return documentTemplate;
|
|
}
|
|
}
|
|
|
|
public string DocumentGroupingId
|
|
{
|
|
get
|
|
{
|
|
// Unique identifier to distinguish this document from others (but keep pages together)
|
|
return $"{TimeStamp.Ticks}|{TargetId}|{DocumentTemplateId}|{CreatorId}|{Version}|{DeploymentChecksum}";
|
|
}
|
|
}
|
|
|
|
public AttachmentTypes? AttachmentType
|
|
{
|
|
get
|
|
{
|
|
if (!attachmentType.HasValue)
|
|
{
|
|
if (DocumentTemplateId.StartsWith("--", StringComparison.Ordinal))
|
|
{
|
|
if (DocumentTemplateId.Equals("--DEVICE", StringComparison.Ordinal))
|
|
{
|
|
attachmentType = AttachmentTypes.Device;
|
|
}
|
|
else if (DocumentTemplateId.Equals("--JOB", StringComparison.Ordinal))
|
|
{
|
|
attachmentType = AttachmentTypes.Job;
|
|
}
|
|
else if (DocumentTemplateId.Equals("--USER", StringComparison.Ordinal))
|
|
{
|
|
attachmentType = AttachmentTypes.User;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
var dt = DocumentTemplate;
|
|
if (dt != null)
|
|
{
|
|
attachmentType = dt.AttachmentType;
|
|
}
|
|
}
|
|
}
|
|
|
|
return attachmentType;
|
|
}
|
|
}
|
|
|
|
public IAttachmentTarget Target
|
|
{
|
|
get
|
|
{
|
|
if (target == null)
|
|
{
|
|
switch (AttachmentType)
|
|
{
|
|
case AttachmentTypes.Device:
|
|
target = database.Devices.Find(TargetId);
|
|
break;
|
|
case AttachmentTypes.Job:
|
|
target = database.Jobs.Find(int.Parse(TargetId));
|
|
break;
|
|
case AttachmentTypes.User:
|
|
target = database.Users.Find(ActiveDirectory.ParseDomainAccountId(TargetId));
|
|
break;
|
|
default:
|
|
throw new ArgumentException("Unexpected Attachment Type", nameof(AttachmentType));
|
|
}
|
|
if (target != null)
|
|
{
|
|
TargetId = target.AttachmentReferenceId;
|
|
}
|
|
}
|
|
|
|
return target;
|
|
}
|
|
}
|
|
|
|
public User Creator
|
|
{
|
|
get
|
|
{
|
|
if (creator == null)
|
|
{
|
|
creator = database.Users.Find(ActiveDirectory.ParseDomainAccountId(CreatorId));
|
|
if (creator != null)
|
|
{
|
|
CreatorId = creator.UserId;
|
|
}
|
|
}
|
|
return creator;
|
|
}
|
|
}
|
|
|
|
private DocumentUniqueIdentifier(DiscoDataContext Database, int Version, short DeploymentChecksum, string DocumentTemplateId, string TargetId, string CreatorId, DateTime TimeStamp, int PageIndex, AttachmentTypes? AttachmentType)
|
|
{
|
|
database = Database;
|
|
this.Version = Version;
|
|
this.DeploymentChecksum = DeploymentChecksum;
|
|
this.DocumentTemplateId = DocumentTemplateId;
|
|
attachmentType = AttachmentType;
|
|
this.TargetId = TargetId;
|
|
this.CreatorId = ActiveDirectory.ParseDomainAccountId(CreatorId);
|
|
this.TimeStamp = TimeStamp;
|
|
this.PageIndex = PageIndex;
|
|
}
|
|
|
|
public string ToQRCodeString()
|
|
{
|
|
return $"Disco|1|{DocumentTemplate.Id}|{TargetId}|{CreatorId}|{TimeStamp:s}|{PageIndex}";
|
|
}
|
|
|
|
public string ToJson()
|
|
{
|
|
var builder = new StringBuilder();
|
|
using (var stringWriter = new StringWriter(builder))
|
|
{
|
|
using (var writer = new JsonTextWriter(stringWriter))
|
|
{
|
|
writer.Formatting = Formatting.Indented;
|
|
writer.WriteStartObject();
|
|
writer.WritePropertyName("version");
|
|
writer.WriteValue(CurrentVersion);
|
|
writer.WritePropertyName("attachmentType");
|
|
writer.WriteValue(AttachmentType.Value.ToString());
|
|
writer.WritePropertyName("documentTemplateId");
|
|
writer.WriteValue(DocumentTemplateId);
|
|
writer.WritePropertyName("targetId");
|
|
writer.WriteValue(TargetId);
|
|
writer.WritePropertyName("creatorId");
|
|
writer.WriteValue(CreatorId);
|
|
writer.WritePropertyName("timestamp");
|
|
writer.WriteValue(TimeStamp);
|
|
writer.WritePropertyName("pageIndex");
|
|
writer.WriteValue(PageIndex);
|
|
writer.WriteEndObject();
|
|
}
|
|
}
|
|
return builder.ToString();
|
|
}
|
|
|
|
public byte[] ToQRCodeBytes()
|
|
{
|
|
// 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)
|
|
const int version = 2;
|
|
|
|
// encode variable-length parameters first
|
|
|
|
// encode creator id (strip default domain)
|
|
var creatorIdBytes = this.BinaryEncode(ActiveDirectory.FriendlyAccountId(CreatorId));
|
|
|
|
// encode target id
|
|
byte[] targetIdBytes;
|
|
if (AttachmentType.HasValue && AttachmentType.Value == AttachmentTypes.User)
|
|
{
|
|
// strip default domain from user targetted attachments
|
|
targetIdBytes = this.BinaryEncode(ActiveDirectory.FriendlyAccountId(TargetId));
|
|
}
|
|
else
|
|
{
|
|
targetIdBytes = this.BinaryEncode(TargetId);
|
|
}
|
|
|
|
byte[] documentTemplateIdBytes = null;
|
|
if (DocumentTemplateId != null)
|
|
{
|
|
documentTemplateIdBytes = this.BinaryEncode(DocumentTemplateId);
|
|
}
|
|
|
|
var result = new byte[10 + creatorIdBytes.Length + targetIdBytes.Length + (documentTemplateIdBytes?.Length ?? 0)];
|
|
|
|
// write magic number
|
|
result[0] = MagicNumber;
|
|
|
|
// write version
|
|
result[1] = (version << 4);
|
|
|
|
// write 'has document template id' flag
|
|
if (documentTemplateIdBytes != null)
|
|
{
|
|
result[1] |= 0x8; // 0000 1000
|
|
}
|
|
|
|
// write attachment type
|
|
switch (AttachmentType)
|
|
{
|
|
case AttachmentTypes.Device:
|
|
result[1] |= 0x2; // 0000 0010 - 01
|
|
break;
|
|
case AttachmentTypes.Job:
|
|
result[1] |= 0x4; // 0000 0100 - 10
|
|
break;
|
|
case AttachmentTypes.User:
|
|
result[1] |= 0x6; // 0000 0110 - 11
|
|
break;
|
|
}
|
|
|
|
// write deployment checksum
|
|
result[2] = (byte)(DeploymentChecksum >> 8);
|
|
result[3] = (byte)DeploymentChecksum;
|
|
|
|
// write timestamp
|
|
var timestamp = (uint)(TimeStamp.ToUniversalTime().Subtract(DateTime.FromFileTimeUtc(116444736000000000L)).Ticks / TimeSpan.TicksPerSecond);
|
|
result[4] = (byte)(timestamp >> 24);
|
|
result[5] = (byte)(timestamp >> 16);
|
|
result[6] = (byte)(timestamp >> 8);
|
|
result[7] = (byte)timestamp;
|
|
|
|
// write page index
|
|
result[8] = (byte)(PageIndex >> 8);
|
|
result[9] = (byte)PageIndex;
|
|
|
|
// write creator id
|
|
creatorIdBytes.CopyTo(result, 10);
|
|
|
|
// write target id
|
|
targetIdBytes.CopyTo(result, 10 + creatorIdBytes.Length);
|
|
|
|
// write document template id
|
|
if (documentTemplateIdBytes != null)
|
|
{
|
|
documentTemplateIdBytes.CopyTo(result, 10 + creatorIdBytes.Length + targetIdBytes.Length);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
public static DocumentUniqueIdentifier Create(DiscoDataContext Database, string DocumentTemplateId, string TargetId, string CreatorId, DateTime TimeStamp, int PageIndex)
|
|
{
|
|
var deploymentChecksum = Database.DiscoConfiguration.DeploymentChecksum;
|
|
|
|
return new DocumentUniqueIdentifier(Database, CurrentVersion, deploymentChecksum, DocumentTemplateId, TargetId, CreatorId, TimeStamp, PageIndex, null);
|
|
}
|
|
|
|
public static DocumentUniqueIdentifier Parse(DiscoDataContext Database, byte[] UniqueIdentifier)
|
|
{
|
|
DocumentUniqueIdentifier identifier;
|
|
if (TryParse(Database, UniqueIdentifier, out identifier))
|
|
{
|
|
return identifier;
|
|
}
|
|
else
|
|
{
|
|
throw new FormatException("Invalid Document Unique Identifier");
|
|
}
|
|
}
|
|
|
|
public static DocumentUniqueIdentifier Parse(DiscoDataContext Database, string UniqueIdentifier)
|
|
{
|
|
DocumentUniqueIdentifier identifier;
|
|
if (TryParse(Database, UniqueIdentifier, out identifier))
|
|
{
|
|
return identifier;
|
|
}
|
|
else
|
|
{
|
|
throw new FormatException("Invalid Document Unique Identifier");
|
|
}
|
|
}
|
|
|
|
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 bool IsDocumentUniqueIdentifier(string Identifier)
|
|
{
|
|
return Identifier != null && Identifier.StartsWith("Disco|", StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
public static bool IsDocumentUniqueIdentifier(byte[] Identifier)
|
|
{
|
|
// Identifier[0] = 0xC4; Magic number to identify Disco ICT QR Codes
|
|
return Identifier != null && Identifier.Length > 2 && Identifier[0] == MagicNumber;
|
|
}
|
|
}
|
|
}
|