public static bool FilterExpressionMatches(this DocumentTemplate dt, object Data, DiscoDataContext Database, User User, System.DateTime TimeStamp, DocumentState State)
{
if (!string.IsNullOrEmpty(dt.FilterExpression))
{
var compiledExpression = dt.FilterExpressionFromCache();
var evaluatorVariables = Expression.StandardVariables(dt, Database, User, TimeStamp, State);
try
{
var er = compiledExpression.EvaluateFirst<object>(Data, evaluatorVariables);
if (er is bool)
{
return (bool)er;
}
bool erBool;
if (bool.TryParse(er.ToString(), out erBool))
{
return erBool;
}
}
catch
{
return false;
}
}
return true;
}
public static Stream GeneratePdf(this DocumentTemplate dt, DiscoDataContext Database, IAttachmentTarget Target, User CreatorUser, DateTime TimeStamp, DocumentState State, bool FlattenFields = false)
{
bool generateExpression = !string.IsNullOrEmpty(dt.OnGenerateExpression);
string generateExpressionResult = null;
if (generateExpression)
generateExpressionResult = dt.EvaluateOnGenerateExpression(Target, Database, CreatorUser, TimeStamp, State);
var pdfStream = Interop.Pdf.PdfGenerator.GenerateFromTemplate(dt, Database, Target, CreatorUser, TimeStamp, State, FlattenFields);
if (generateExpression)
DocumentsLog.LogDocumentGenerated(dt, Target, CreatorUser, generateExpressionResult);
else
DocumentsLog.LogDocumentGenerated(dt, Target, CreatorUser);
return pdfStream;
}
public static Stream GenerateFromPackage(DocumentTemplatePackage package, DiscoDataContext Database, IAttachmentTarget Data, User CreatorUser, DateTime Timestamp, DocumentState State)
{
var templates = package.GetDocumentTemplates(Database);
if (templates.Count == 0)
return null;
bool generateExpression = !string.IsNullOrEmpty(package.OnGenerateExpression);
string generateExpressionResult = null;
if (generateExpression)
generateExpressionResult = package.EvaluateOnGenerateExpression(Data, Database, CreatorUser, Timestamp, State);
List<Stream> generatedPdfs = new List<Stream>(templates.Count);
foreach (var template in templates)
{
generatedPdfs.Add(template.GeneratePdf(Database, Data, CreatorUser, Timestamp, State, true));
State.SequenceNumber++;
State.FlushScopeCache();
}
if (generateExpression)
DocumentsLog.LogDocumentPackageGenerated(package, Data, CreatorUser, generateExpressionResult);
else
DocumentsLog.LogDocumentPackageGenerated(package, Data, CreatorUser);
if (generatedPdfs.Count == 1)
{
return generatedPdfs[0];
}
else
{
Stream bulkPdf = Utilities.JoinPdfs(package.InsertBlankPages, generatedPdfs);
foreach (Stream singlePdf in generatedPdfs)
singlePdf.Dispose();
return bulkPdf;
}
}
public static string EvaluateOnGenerateExpression(this DocumentTemplate dt, object Data, DiscoDataContext Database, User User, DateTime TimeStamp, DocumentState State)
{
if (!string.IsNullOrEmpty(dt.OnGenerateExpression))
{
var compiledExpression = dt.OnGenerateExpressionFromCache();
var evaluatorVariables = Expression.StandardVariables(dt, Database, User, TimeStamp, State);
var result = compiledExpression.EvaluateFirst<object>(Data, evaluatorVariables);
return result.ToString();
}
return null;
}
public static Stream GenerateFromTemplate(DocumentTemplate dt, DiscoDataContext Database, IAttachmentTarget Data, User CreatorUser, DateTime TimeStamp, DocumentState State, bool FlattenFields = false)
{
// Validate Data
switch (dt.Scope)
{
case DocumentTemplate.DocumentTemplateScopes.Device:
if (!(Data is Device))
throw new ArgumentException("This AttachmentType is configured for Devices only", "Data");
break;
case DocumentTemplate.DocumentTemplateScopes.Job:
if (!(Data is Job))
throw new ArgumentException("This AttachmentType is configured for Jobs only", "Data");
break;
case DocumentTemplate.DocumentTemplateScopes.User:
if (!(Data is User))
throw new ArgumentException("This AttachmentType is configured for Users only", "Data");
break;
default:
throw new InvalidOperationException("Invalid AttachmentType Scope");
}
Database.Configuration.LazyLoadingEnabled = true;
// Override FlattenFields if Document Template instructs.
if (dt.FlattenForm)
FlattenFields = true;
ConcurrentDictionary<string, Expression> expressionCache = dt.PdfExpressionsFromCache(Database);
string templateFilename = dt.RepositoryFilename(Database);
PdfReader pdfReader = new PdfReader(templateFilename);
MemoryStream pdfGeneratedStream = new MemoryStream();
PdfStamper pdfStamper = new PdfStamper(pdfReader, pdfGeneratedStream);
pdfStamper.FormFlattening = FlattenFields;
pdfStamper.Writer.CloseStream = false;
IDictionary expressionVariables = Expression.StandardVariables(dt, Database, CreatorUser, TimeStamp, State);
foreach (string pdfFieldKey in pdfStamper.AcroFields.Fields.Keys)
{
if (pdfFieldKey.Equals("DiscoAttachmentId", StringComparison.OrdinalIgnoreCase))
{
AcroFields.Item fields = pdfStamper.AcroFields.Fields[pdfFieldKey];
string fieldValue = dt.CreateUniqueIdentifier(Database, Data, CreatorUser, TimeStamp, 0).ToJson();
if (FlattenFields)
pdfStamper.AcroFields.SetField(pdfFieldKey, String.Empty);
else
pdfStamper.AcroFields.SetField(pdfFieldKey, fieldValue);
IList<AcroFields.FieldPosition> pdfFieldPositions = pdfStamper.AcroFields.GetFieldPositions(pdfFieldKey);
for (int pdfFieldOrdinal = 0; pdfFieldOrdinal < fields.Size; pdfFieldOrdinal++)
{
AcroFields.FieldPosition pdfFieldPosition = pdfFieldPositions[pdfFieldOrdinal];
// Create Binary Unique Identifier
var pageUniqueId = dt.CreateUniqueIdentifier(Database, Data, CreatorUser, TimeStamp, pdfFieldPosition.page);
var pageUniqueIdBytes = pageUniqueId.ToQRCodeBytes();
// Encode to QRCode byte array
var pageUniqueIdWidth = (int)pdfFieldPosition.position.Width;
var pageUniqueIdHeight = (int)pdfFieldPosition.position.Height;
var pageUniqueIdEncoded = QRCodeBinaryEncoder.Encode(pageUniqueIdBytes, pageUniqueIdWidth, pageUniqueIdHeight);
// Encode byte array to Image
var pageUniqueIdImageData = CCITTG4Encoder.Compress(pageUniqueIdEncoded, pageUniqueIdWidth, pageUniqueIdHeight);
var pageUniqueIdImage = iTextSharp.text.Image.GetInstance(pageUniqueIdWidth, pageUniqueIdHeight, false, 256, 1, pageUniqueIdImageData, null);
// Add to the pdf page
pageUniqueIdImage.SetAbsolutePosition(pdfFieldPosition.position.Left, pdfFieldPosition.position.Bottom);
pdfStamper.GetOverContent(pdfFieldPosition.page).AddImage(pageUniqueIdImage);
}
// Hide Fields
PdfDictionary field = fields.GetValue(0);
if ((PdfName)field.Get(PdfName.TYPE) == PdfName.ANNOT)
{
field.Put(PdfName.F, new PdfNumber(6));
}
else
{
PdfArray fieldKids = (PdfArray)field.Get(PdfName.KIDS);
foreach (PdfIndirectReference fieldKidRef in fieldKids)
{
((PdfDictionary)pdfReader.GetPdfObject(fieldKidRef.Number)).Put(PdfName.F, new PdfNumber(6));
}
}
}
else
{
Expression fieldExpression = null;
if (expressionCache.TryGetValue(pdfFieldKey, out fieldExpression))
{
if (fieldExpression.IsDynamic)
{
Tuple<string, bool, object> fieldExpressionResult = fieldExpression.Evaluate(Data, expressionVariables);
if (fieldExpressionResult.Item3 != null)
{
IImageExpressionResult imageResult = (fieldExpressionResult.Item3 as IImageExpressionResult);
if (imageResult != null)
{
// Output Image
AcroFields.Item fields = pdfStamper.AcroFields.Fields[pdfFieldKey];
IList<AcroFields.FieldPosition> pdfFieldPositions = pdfStamper.AcroFields.GetFieldPositions(pdfFieldKey);
for (int pdfFieldOrdinal = 0; pdfFieldOrdinal < fields.Size; pdfFieldOrdinal++)
{
AcroFields.FieldPosition pdfFieldPosition = pdfFieldPositions[pdfFieldOrdinal];
iTextSharp.text.Image pdfImage = iTextSharp.text.Image.GetInstance(imageResult.GetImage((int)pdfFieldPosition.position.Width, (int)pdfFieldPosition.position.Height));
pdfImage.SetAbsolutePosition(pdfFieldPosition.position.Left, pdfFieldPosition.position.Bottom);
pdfStamper.GetOverContent(pdfFieldPosition.page).AddImage(pdfImage);
}
if (!fieldExpressionResult.Item2 && !imageResult.ShowField)
{
// Hide Fields
PdfDictionary field = fields.GetValue(0);
if ((PdfName)field.Get(PdfName.TYPE) == PdfName.ANNOT)
{
field.Put(PdfName.F, new PdfNumber(6));
}
else
{
PdfArray fieldKids = (PdfArray)field.Get(PdfName.KIDS);
foreach (PdfIndirectReference fieldKidRef in fieldKids)
{
((PdfDictionary)pdfReader.GetPdfObject(fieldKidRef.Number)).Put(PdfName.F, new PdfNumber(6));
}
}
}
}
}
pdfStamper.AcroFields.SetField(pdfFieldKey, fieldExpressionResult.Item1);
if (fieldExpressionResult.Item2) // Expression Error
{
AcroFields.Item fields = pdfStamper.AcroFields.Fields[pdfFieldKey];
for (int pdfFieldOrdinal = 0; pdfFieldOrdinal < fields.Size; pdfFieldOrdinal++)
{
PdfDictionary field = fields.GetValue(pdfFieldOrdinal);
PdfDictionary fieldMK;
if (field.Contains(PdfName.MK))
fieldMK = field.GetAsDict(PdfName.MK);
else
{
fieldMK = new PdfDictionary(PdfName.MK);
field.Put(PdfName.MK, fieldMK);
}
fieldMK.Put(PdfName.BC, new PdfArray(new float[] { 1, 0, 0 }));
}
}
}
}
else
{
throw new InvalidOperationException("Pdf template field expressions are out of sync with the expression cache");
}
}
State.FlushFieldCache();
}
pdfStamper.Close();
pdfReader.Close();
if (dt.Scope == DocumentTemplate.DocumentTemplateScopes.Job)
{
// Write Job Log
Job j = (Job)Data;
JobLog jl = new JobLog()
{
JobId = j.Id,
TechUserId = CreatorUser.UserId,
Timestamp = DateTime.Now
};
jl.Comments = string.Format("# Document Generated\r\n**{0}** [{1}]", dt.Description, dt.Id);
Database.JobLogs.Add(jl);
}
pdfGeneratedStream.Position = 0;
return pdfGeneratedStream;
}
public static string EvaluateOnGenerateExpression(this DocumentTemplatePackage package, object Data, DiscoDataContext Database, User User, DateTime TimeStamp, DocumentState State)
{
if (!string.IsNullOrEmpty(package.OnGenerateExpression))
{
Expression compiledExpression = package.OnGenerateExpressionFromCache();
System.Collections.IDictionary evaluatorVariables = Expression.StandardVariables(null, Database, User, TimeStamp, State);
evaluatorVariables.Add("Package", package);
try
{
object result = compiledExpression.EvaluateFirst<object>(Data, evaluatorVariables);
return result.ToString();
}
catch
{
throw;
}
}
return null;
}
public static Stream GeneratePdfPackage(this DocumentTemplatePackage package, DiscoDataContext Database, IAttachmentTarget Target, User CreatorUser, DateTime TimeStamp, DocumentState State)
{
return Interop.Pdf.PdfGenerator.GenerateFromPackage(package, Database, Target, CreatorUser, TimeStamp, State);
}