Modules/Jobs/EDMI/ZUGFeRD/ImportZUGFeRDFiles.vb
2019-09-18 15:40:18 +02:00

645 lines
33 KiB
VB.net

Imports System.Collections.Generic
Imports System.Data
Imports System.IO
Imports System.Linq
Imports System.Reflection
Imports System.Security.Cryptography
Imports System.Text.RegularExpressions
Imports System.Xml
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Interfaces
Imports DigitalData.Modules.Interfaces.Exceptions
Imports DigitalData.Modules.Jobs.Exceptions
Imports DigitalData.Modules.Logging
Imports FirebirdSql.Data.FirebirdClient
Public Class ImportZUGFeRDFiles
Implements IJob
Public Const ZUGFERD_IN = "ZUGFeRD in"
Public Const ZUGFERD_ERROR = "ZUGFeRD Error"
Public Const ZUGFERD_SUCCESS = "ZUGFeRD Success"
Public Const ZUGFERD_EML = "ZUGFeRD Eml"
Public Const ZUGFERD_REJECTED_EML = "ZUGFeRD Eml Rejected"
Public Const ZUGFERD_ATTACHMENTS = "ZUGFeRD Attachments"
Private _logger As Logger
Private _logConfig As LogConfig
Private _zugferd As ZUGFeRDInterface
Private _firebird As Firebird
Private _filesystem As Filesystem.File
Private _mssql As MSSQLServer
Public Sub New(LogConfig As LogConfig, Firebird As Firebird, Optional MSSQL As MSSQLServer = Nothing)
_logConfig = LogConfig
_logger = LogConfig.GetLogger()
_firebird = Firebird
_filesystem = New Filesystem.File(_logConfig)
_zugferd = New ZUGFeRDInterface(_logConfig)
_mssql = MSSQL
End Sub
Private Function RandomValue(lowerBound As Integer, upperBound As Integer) As Integer
Dim oRandomValue = CInt(Math.Floor((upperBound - lowerBound + 1) * Rnd())) + lowerBound
Return oRandomValue
End Function
Private Function GetEmailDataForMessageId(MessageId As String) As EmailData
Dim oSQL = $"SELECT EMAIL_FROM, EMAIL_SUBJECT, EMAIL_ATTMT1 FROM TBEDM_EMAIL_PROFILER_HISTORY WHERE EMAIL_MSGID = '{MessageId}'"
Try
Dim oDatatable = _firebird.GetDatatable(oSQL)
Dim oRow As DataRow
If oDatatable.Rows.Count = 0 Then
_logger.Warn("Got no results for MessageId {0}", MessageId)
Return Nothing
ElseIf oDatatable.Rows.Count > 1 Then
_logger.Warn("Got too many results for MessageId {0}. Using first row.", MessageId)
End If
_logger.Debug("Got Email Data for FileId {0}", MessageId)
oRow = oDatatable.Rows.Item(0)
Return New EmailData() With {
.From = oRow.Item("EMAIL_FROM"),
.Attachment = oRow.Item("EMAIL_ATTMT1"),
.Subject = oRow.Item("EMAIL_SUBJECT")
}
Catch ex As Exception
_logger.Warn("Could not fetch Email Data for FileId {0}", MessageId)
Return Nothing
End Try
End Function
Private Function GetOriginalEmailPath(OriginalEmailDirectory As String, MessageId As String) As String
Dim oAttachmentDirectory = OriginalEmailDirectory
Dim oAttachmentFile = MessageId & ".eml"
Dim oAttachmentPath = Path.Combine(oAttachmentDirectory, oAttachmentFile)
If File.Exists(oAttachmentPath) Then
Return oAttachmentPath
Else
Return String.Empty
End If
End Function
Private Function GetEmailPathWithSubjectAsName(RejectedEmailDirectory As String, UncleanedSubject As String) As String
Dim oCleanSubject = String.Join("", UncleanedSubject.Split(Path.GetInvalidPathChars()))
Dim oAttachmentDirectory = RejectedEmailDirectory
Dim oAttachmentFile = oCleanSubject & ".eml"
Dim oAttachmentPath = Path.Combine(oAttachmentDirectory, oAttachmentFile)
Return oAttachmentPath
End Function
Private Function MoveAndRenameEmailToRejected(Args As WorkerArgs, MessageId As String) As EmailData
Dim oEmailData = GetEmailDataForMessageId(MessageId)
Dim oSource = GetOriginalEmailPath(Args.OriginalEmailDirectory, MessageId)
Dim oDestination = GetEmailPathWithSubjectAsName(Args.RejectedEmailDirectory, oEmailData.Subject)
Try
File.Move(oSource, oDestination)
oEmailData.Attachment = oDestination
Catch ex As Exception
_logger.Warn("File {0} could not be moved! Original Filename will be used!", oSource)
_logger.Error(ex)
oEmailData.Attachment = oSource
End Try
Return oEmailData
End Function
Private Sub AddToEmailQueue(MessageId As String, BodyText As String, EmailData As EmailData)
Try
Dim oJobId = RandomValue(1, 10000)
Dim oReference = MessageId
Dim oEmailTo = ""
Dim oSubject = "Your email was rejected"
Dim oAccountId = 1
Dim oCreatedWho = "ZUGFeRD Service"
Dim oEmailAddress = EmailData.From
Dim oAttachment = EmailData.Attachment
If IsNothing(oEmailAddress) OrElse String.IsNullOrWhiteSpace(oEmailAddress) Then
_logger.Warn("Could not find email-address for MessageId {0}", MessageId)
oEmailTo = String.Empty
Else
oEmailTo = oEmailAddress
End If
_logger.Debug("Generated Email:")
_logger.Debug("To: {0}", oEmailTo)
_logger.Debug("Subject: {0}", oSubject)
_logger.Debug("Body {0}", BodyText)
Dim oSQLInsert = $"INSERT INTO TBEDM_EMAIL_QUEUE "
oSQLInsert &= "(JOB_ID, REFERENCE1, EMAIL_ACCOUNT_ID, EMAIL_TO, EMAIL_SUBJ, EMAIL_BODY, CREATEDWHO, EMAIL_ATTMT1) VALUES "
oSQLInsert &= $"({oJobId}, '{oReference}', {oAccountId}, '{oEmailTo}', '{oSubject}', '{BodyText}', '{oCreatedWho}', '{oAttachment}')"
_firebird.ExecuteNonQuery(oSQLInsert)
_logger.Debug("Email Queue updated for MessageId {0}.", MessageId, oEmailTo)
Catch ex As Exception
_logger.Error(ex)
End Try
End Sub
Private Function GetMessageIdFromFileName(Filename As String) As String
' Regex to find MessageId
' See also: https://stackoverflow.com/questions/3968500/regex-to-validate-a-message-id-as-per-rfc2822
Dim oRegex = "(((([a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*)|(""(([\x01-\x08\x0B\x0C\x0E-\x1F\x7F]|[\x21\x23-\x5B\x5D-\x7E])|(\\[\x01-\x09\x0B\x0C\x0E-\x7F]))*""))@(([a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*)|(\[(([\x01-\x08\x0B\x0C\x0E-\x1F\x7F]|[\x21-\x5A\x5E-\x7E])|(\\[\x01-\x09\x0B\x0C\x0E-\x7F]))*\]))))~.+"
Dim oMatch = Regex.Match(Filename, oRegex, RegexOptions.IgnoreCase)
If oMatch.Success Then
Dim oMessageId = oMatch.Groups(1).Value
Return oMessageId
Else
Return Nothing
End If
End Function
Private Function GroupFiles(Files As List(Of FileInfo)) As Dictionary(Of String, List(Of FileInfo))
Dim oGrouped As New Dictionary(Of String, List(Of FileInfo))
If Files.Count = 0 Then
Return oGrouped
End If
For Each oFile In Files
Dim oMessageId = GetMessageIdFromFileName(oFile.Name)
If oMessageId Is Nothing Then
_logger.Warn("File {0} did not have the required filename-format!", oMessageId)
Continue For
End If
If oGrouped.ContainsKey(oMessageId) Then
oGrouped.Item(oMessageId).Add(oFile)
Else
oGrouped.Add(oMessageId, New List(Of FileInfo) From {oFile})
End If
Next
Return oGrouped
End Function
Public Sub Start(Arguments As Object) Implements IJob.Start
Dim args As WorkerArgs = Arguments
Dim oPropertyExtractor = New PropertyValues(_logConfig)
_logger.Info("Starting Job {0}", [GetType].Name)
Try
For Each oPath As String In args.WatchDirectories
Dim oDirInfo As New DirectoryInfo(oPath)
_logger.Info($"Start processing directory {oDirInfo.FullName}")
If oDirInfo.Exists Then
' Filter out *.lock files
Dim oFiles As List(Of FileInfo) = oDirInfo.
GetFiles().
Where(Function(f) Not f.Name.EndsWith(".lock")).
ToList()
Dim oFileCount = oFiles.Count
Dim oCurrentFileCount = 0
If oFileCount = 0 Then
_logger.Info("No files to process.")
Continue For
Else
_logger.Info("Found {0} files", oFileCount)
End If
' Group files by messageId
Dim oGrouped As Dictionary(Of String, List(Of FileInfo)) = GroupFiles(oFiles)
_logger.Info("Found {0} file groups", oGrouped.Count)
' Process each file group together
For Each oFileGroup In oGrouped
' Start a new transaction for each file group.
' This way we can rollback database changes for the whole filegroup in case something goes wrong.
Dim oConnection As FbConnection = _firebird.GetConnection()
Dim oTransaction As FbTransaction = oConnection.BeginTransaction()
' Count the amount of ZUGFeRD files
Dim oZUGFeRDCount As Integer = 0
' Set the default Move Directory
Dim oMoveDirectory As String = args.SuccessDirectory
' Create file lists
Dim oFileGroupFiles As List(Of FileInfo) = oFileGroup.Value
Dim oFileAttachmentFiles As New List(Of FileInfo)
Dim oFileGroupId As String = oFileGroup.Key
Dim oMissingProperties As New List(Of String)
Dim oMD5CheckSum As String = String.Empty
_logger.NewBlock($"Message Id {oFileGroupId}")
_logger.Info("Start processing file group {0}", oFileGroupId)
Try
For Each oFile In oFileGroupFiles
Dim oDocument As CrossIndustryDocumentType
' Start a global group counter for each file
Dim oGlobalGroupCounter = 0
' Clear missing properties for the new file
oMissingProperties = New List(Of String)
oCurrentFileCount += 1
' Only pdf files are allowed from here on
If Not oFile.Name.EndsWith(".pdf") Then
_logger.Debug("Skipping non-pdf file {0}", oFile.Name)
oFileAttachmentFiles.Add(oFile)
Continue For
End If
_logger.Info("Start processing file {0}", oFile.Name)
Try
oDocument = _zugferd.ExtractZUGFeRDFile(oFile.FullName)
Catch ex As ZUGFeRDExecption
Select Case ex.ErrorType
Case ZUGFeRDInterface.ErrorType.NoZugferd
_logger.Warn("File is not a valid ZUGFeRD document! Skipping.")
oFileAttachmentFiles.Add(oFile)
Continue For
Case ZUGFeRDInterface.ErrorType.NoValidZugferd
_logger.Warn("File is an Incorrectly formatted ZUGFeRD document!")
Throw New InvalidFerdException()
Case Else
_logger.Warn("Unexpected Error occurred while extracting ZUGFeRD Information from file {0}", oFile.FullName)
Throw ex
End Select
End Try
oMD5CheckSum = CreateMD5(oFile.FullName)
If oMD5CheckSum <> String.Empty Then
Dim oCheckCommand = $"SELECT * FROM TBEDM_ZUGFERD_HISTORY_IN WHERE UPPER(MD5HASH) = UPPER('{oMD5CheckSum}')"
Dim oMD5DT As DataTable = _firebird.GetDatatable(oCheckCommand, Firebird.TransactionMode.ExternalTransaction)
If Not IsNothing(oMD5DT) Then
If oMD5DT.Rows.Count = 1 Then
'TODO: Hier muss noch gepüft werden ob die Rechnung schon mal abgelehnt wurde?!
Throw New MD5HashException()
End If
Else
_logger.Warn("Be careful: oExistsDT is nothing!")
End If
Else
_logger.Warn("Be careful: oMD5CheckSum is nothing!")
End If
' Check if there are more than one ZUGFeRD files
If oZUGFeRDCount = 1 Then
Throw New TooMuchFerdsException()
End If
' Since extraction went well, increase the amount of ZUGFeRD files
oZUGFeRDCount += 1
' PropertyMap items with `IsGrouped = False` are handled normally
Dim oDefaultProperties As Dictionary(Of String, XmlItemProperty) = args.PropertyMap.
Where(Function(Item As KeyValuePair(Of String, XmlItemProperty))
Return Item.Value.IsGrouped = False
End Function).
ToDictionary(Function(Item) Item.Key,
Function(Item) Item.Value)
_logger.Debug("Found {0} default properties.", oDefaultProperties.Count)
' PropertyMap items with `IsGrouped = True` are grouped by group scope
Dim oGroupedProperties = args.PropertyMap.
Where(Function(Item) Item.Value.IsGrouped = True).
ToLookup(Function(Item) Item.Value.GroupScope, ' Lookup key is group scope
Function(Item) Item)
_logger.Debug("Found {0} properties grouped in {1} group(s)", args.PropertyMap.Count - oDefaultProperties.Count, oGroupedProperties.Count)
' Iterate through groups to get group scope and group items
For Each oGroup In oGroupedProperties
Dim oGroupScope As String = oGroup.Key
Dim oPropertyList As New Dictionary(Of XmlItemProperty, List(Of Object))
Dim oRowCount = 0
_logger.Debug("Fetching Property values for group {0}.", oGroupScope)
' get properties as a nested object, see `oPropertyList`
For Each oProperty As KeyValuePair(Of String, XmlItemProperty) In oGroup
Dim oPropertyValues As List(Of Object)
Try
oPropertyValues = oPropertyExtractor.GetPropValue(oDocument, oProperty.Key)
Catch ex As Exception
_logger.Warn("Unknown error occurred while fetching property {0} in group {1}:", oProperty.Value.Description, oGroupScope)
_logger.Error(ex)
oPropertyValues = New List(Of Object)
End Try
' Flatten result value
oPropertyValues = oPropertyExtractor.GetFinalPropValue(oPropertyValues)
' Add to list
oPropertyList.Add(oProperty.Value, oPropertyValues)
' check the first batch of values to determine the row count
If oRowCount = 0 Then
oRowCount = oPropertyValues.Count
End If
Next
' Structure of oPropertyList
' [ # Propertyname # Row 1 # Row 2
' PositionsMenge: [BilledQuantity1, BilledQuantity2, ...],
' PositionsSteuersatz: [ApplicablePercent1, ApplicablePercent2, ...],
' ...
' ]
For oRowIndex = 0 To oRowCount - 1
_logger.Debug("Processing row {0}", oRowIndex)
For Each oColumn As KeyValuePair(Of XmlItemProperty, List(Of Object)) In oPropertyList
Dim oTableName As String = oColumn.Key.TableName
Dim oPropertyDescription As String = oColumn.Key.Description
Dim oRowCounter = oRowIndex + oGlobalGroupCounter + 1
' Returns nothing if oColumn.Value contains an empty list
Dim oPropertyValue = oColumn.Value.ElementAtOrDefault(oRowIndex)
_logger.Debug("Processing property {0}.", oPropertyDescription)
If IsNothing(oPropertyValue) OrElse String.IsNullOrEmpty(oPropertyValue) Then
If oColumn.Key.IsRequired Then
_logger.Warn("Property {0} is empty or not found but was required. Continuing with Empty String.", oPropertyDescription)
oMissingProperties.Add(oPropertyDescription)
Else
_logger.Warn("Property {0} is empty or not found. Continuing with Empty String.", oPropertyDescription)
End If
oPropertyValue = String.Empty
End If
_logger.Debug("Property {0} has value '{1}'", oPropertyDescription, oPropertyValue)
Dim oCommand = $"INSERT INTO {oTableName} (REFERENCE_GUID, ITEM_DESCRIPTION, ITEM_VALUE, GROUP_COUNTER) VALUES ('{oFileGroupId}', '{oPropertyDescription}', '{oPropertyValue}', {oRowCounter})"
_logger.Debug("Mapping Property {0} to value {1}. Will be inserted into table {2} with RowCounter {3}", oPropertyDescription, oPropertyValue, oTableName, oRowCounter)
' Insert into SQL Server
If args.InsertIntoSQLServer = True Then
Dim oResult = _mssql.NewExecutenonQuery(oCommand)
If oResult = False Then
_logger.Warn("SQL Command was not successful. Check the log.")
End If
End If
' Insert into Firebird
_firebird.ExecuteNonQueryWithConnection(oCommand, oConnection, Firebird.TransactionMode.ExternalTransaction, oTransaction)
Next
Next
oGlobalGroupCounter += oRowCount
Next
' Iterate through default properties
For Each Item As KeyValuePair(Of String, XmlItemProperty) In oDefaultProperties
Dim oPropertyValueList As List(Of Object)
Dim oPropertyDescription As String = Item.Value.Description
Dim oPropertyValue As Object = Nothing
Try
oPropertyValueList = oPropertyExtractor.GetPropValue(oDocument, Item.Key)
Catch ex As Exception
_logger.Warn("Unknown error occurred while fetching property {0} in group {1}:", oPropertyDescription, Item.Value.GroupScope)
_logger.Error(ex)
oPropertyValueList = New List(Of Object)
End Try
Try
If IsNothing(oPropertyValueList) Then
oPropertyValue = Nothing
ElseIf TypeOf oPropertyValueList Is List(Of Object) Then
Select Case oPropertyValueList.Count
Case 0
oPropertyValue = Nothing
Case Else
Dim oList As List(Of Object) = DirectCast(oPropertyValueList, List(Of Object))
oPropertyValue = oList.Item(0)
' This should hopefully show config errors
If TypeOf oPropertyValue Is List(Of Object) Then
_logger.Warn("Property with Description {0} may be configured incorrectly", oPropertyDescription)
oPropertyValue = Nothing
End If
End Select
End If
Catch ex As Exception
_logger.Warn("Unknown error occurred while processing property {0}:", oPropertyDescription)
_logger.Error(ex)
oPropertyValue = Nothing
End Try
If IsNothing(oPropertyValue) OrElse String.IsNullOrEmpty(oPropertyValue) Then
If Item.Value.IsRequired Then
_logger.Warn("Property {0} is empty but marked as required! Skipping.", oPropertyDescription)
oMissingProperties.Add(oPropertyDescription)
Continue For
Else
_logger.Debug("Property {0} is empty or not found. Skipping.", oPropertyDescription)
Continue For
End If
End If
Dim oTableName = Item.Value.TableName
Dim oCommand = $"INSERT INTO {oTableName} (REFERENCE_GUID, ITEM_DESCRIPTION, ITEM_VALUE) VALUES ('{oFileGroupId}', '{oPropertyDescription}', '{oPropertyValue}')"
_logger.Debug("Mapping Property {0} to value {1}. Will be inserted into table {2}", oPropertyDescription, oPropertyValue, oTableName)
' Insert into SQL Server
If args.InsertIntoSQLServer = True Then
Dim oResult = _mssql.NewExecutenonQuery(oCommand)
If oResult = False Then
_logger.Warn("SQL Command was not successful. Check the log.")
End If
End If
' Insert into Firebird
_firebird.ExecuteNonQueryWithConnection(oCommand, oConnection, Firebird.TransactionMode.ExternalTransaction, oTransaction)
Next
If oMissingProperties.Count > 0 Then
Throw New MissingValueException(oFile)
End If
Next
'Check if there are no ZUGFeRD files
If oZUGFeRDCount = 0 Then
Throw New NoFerdsException()
End If
'If no errors occurred...
'Log the History
If oMD5CheckSum <> String.Empty Then
Dim oInsertCommand = $"INSERT INTO TBEDM_ZUGFERD_HISTORY_IN (MESSAGE_ID, MD5HASH) VALUES ('{oFileGroupId}', '{oMD5CheckSum}')"
_firebird.ExecuteNonQueryWithConnection(oInsertCommand, oConnection, Firebird.TransactionMode.ExternalTransaction, oTransaction)
End If
'commit the transaction
oTransaction.Commit()
Catch ex As MD5HashException
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Dim oBody = "<p>The invoice attached to your email has already been processed in our system.</p>"
Dim oEmailData = MoveAndRenameEmailToRejected(args, oFileGroupId)
AddToEmailQueue(oFileGroupId, oBody, oEmailData)
Catch ex As InvalidFerdException
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Dim oBody = """
<p>Your email contained a ZUGFeRD document but it was incorrectly formatted.</p>
<p>Possible reasons include:<ul>
<li>Amount value has incorrect format (25,01 instead of 25.01)</li>
</ul></p>
"""
Dim oEmailData = MoveAndRenameEmailToRejected(args, oFileGroupId)
AddToEmailQueue(oFileGroupId, oBody, oEmailData)
Catch ex As TooMuchFerdsException
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Dim oBody = "<p>Your email contained more than one ZUGFeRD-Document.</p>"
Dim oEmailData = MoveAndRenameEmailToRejected(args, oFileGroupId)
AddToEmailQueue(oFileGroupId, oBody, oEmailData)
Catch ex As NoFerdsException
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Dim oBody = "<p>Your email contained no ZUGFeRD-Documents.</p>"
Dim oEmailData = MoveAndRenameEmailToRejected(args, oFileGroupId)
AddToEmailQueue(oFileGroupId, oBody, oEmailData)
Catch ex As MissingValueException
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Dim oBody = CreateBodyForMissingProperties(ex.File.Name, oMissingProperties)
Dim oEmailData = MoveAndRenameEmailToRejected(args, oFileGroupId)
AddToEmailQueue(oFileGroupId, oBody, oEmailData)
Catch ex As Exception
_logger.Warn("Unknown Error occurred: {0}", ex.Message)
_logger.Error(ex)
oMoveDirectory = args.ErrorDirectory
Finally
oConnection.Close()
' Move all files of the current group
Try
MoveFiles(args, oFileGroupFiles, oFileAttachmentFiles, oMoveDirectory)
_logger.Info("Finished processing file group {0}", oFileGroupId)
Catch ex As Exception
_logger.Warn("Could not move files!")
_logger.Error(ex)
Throw ex
Finally
_logger.EndBlock()
End Try
End Try
Next
End If
Next
_logger.Info("Finishing Job {0}", Me.GetType.Name)
Catch ex As Exception
_logger.Error(ex)
_logger.Info("Job Failed! See error log for details")
End Try
End Sub
Private Sub MoveFiles(Args As WorkerArgs, Files As List(Of FileInfo), AttachmentFiles As List(Of FileInfo), MoveDirectory As String)
For Each oFile In Files
Try
Dim oFinalMoveDirectory As String = MoveDirectory
If AttachmentFiles.Contains(oFile) Then
oFinalMoveDirectory = Path.Combine(MoveDirectory, Args.AttachmentsSubDirectory)
If Not Directory.Exists(oFinalMoveDirectory) Then
Directory.CreateDirectory(oFinalMoveDirectory)
End If
End If
Dim oVersion As Integer = 0
Dim oFileName As String = Path.Combine(oFinalMoveDirectory, oFile.Name)
Do While File.Exists(oFileName)
If oVersion > 29 Then
Throw New ApplicationException("Max. Move-Retries of 30 exceeded! Move will be aborted!")
End If
oVersion += 1
Dim oExtension = Path.GetExtension(oFileName)
Dim oRootName = Path.GetFileNameWithoutExtension(oFile.Name)
Dim oNewName As String = oRootName & "~" & oVersion & oExtension
oFileName = Path.Combine(oFinalMoveDirectory, oNewName)
Loop
_filesystem.MoveTo(oFile.FullName, oFileName, oFinalMoveDirectory)
_logger.Info("Finished processing file {0}", oFile.Name)
_logger.Info("File moved to {0}", oFileName)
Catch ex As Exception
_logger.Warn("Could not move file {0}", oFile.FullName)
_logger.Error(ex)
End Try
Next
End Sub
Private Function CreateBodyForMissingProperties(OriginalFilename As String, MissingProperties As List(Of String))
Dim oBody = $"<p>The following file is not ZUGFeRD-compliant: {OriginalFilename}</p>"
If MissingProperties.Count > 0 Then
oBody &= $"{vbNewLine}{vbNewLine}"
oBody &= $"The following Properties were marked as Required but were not found:"
oBody &= $"{vbNewLine}{vbNewLine}"
For Each prop In MissingProperties
oBody &= $"- {prop}"
Next
End If
Return oBody
End Function
Private Function CreateMD5(ByVal Filename As String) As String
Try
Dim oMD5 As New MD5CryptoServiceProvider
Dim oHash As Byte()
Dim oHashString As String
Dim oResult As String = ""
Using oFileStream As New FileStream(Filename, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
oHash = oMD5.ComputeHash(oFileStream)
oHashString = BitConverter.ToString(oHash)
End Using
oResult = oHashString.Replace("-", "")
Return oResult
Catch ex As Exception
_logger.Error(ex)
Return ""
End Try
End Function
End Class