' ArticleExists(Identifier: String)
' ---------------------------------------------------------
' Findet Artikelnummer anhand von versch. Kriterien
' - Artikel-Nummer, Alternative Artikel-Nummer, EAN-Code, Seriennummer
' - Gibt die Zeile im Grid zurück in der Artikel das erste Mal gefunden wurde
' 
' Rückgabewert: ArticleRow: Int
' ---------------------------------------------------------
' Version Date: 04.01.2021

Const ARTICLE_EXISTS_NO_STOCK = -99
Const ARTICLE_EXISTS_NO_SERIALNUMBER = -98
Const ARTICLE_EXISTS_NO_ARTICLE_EAN = -97
Const ARTICLE_EXISTS_NO_REGEX_MATCH = -96

Function ArticleExists(Identifier)
	ArticleExists = 0
	HasError = False
	CURRENT_SERIALNUMBER = ""
		
	Set mywin = CWLStart.CurrentModule.Windows.Item(WINDOW_ID)
	Set Grid = mywin.Controls.Item(GRID_ID).Grid
	
	' ===================== ARTIKEL NUMMER / EAN-CODE =====================
	SQL = ""
	' Artikelnummer / EAN-Code / Alternative Artikelnummer
	SQL = SQL & "((C002 = '" & Identifier & "') Or (C075 = '" & Identifier & "') Or (C114 = '" & Identifier & "')) AND "
	' Artikel darf nicht inaktiv sein
	SQL = SQL & "(c038 IS NULL) "
	' Nach Mandant und Wirtschaftsjahr filtern
	SQL = SQL & SQLQuery_BasicWhere
	
	Set ResultArtikel = CWLStart.CurrentCompany.SearchRecord(TABLE_21, SQL)
	
	If DEBUG_ON = True Then
		AddDebugLine "Searching for Article by ArticleNo/EAN-Code.. " & vbNewline & vbNewline
		AddDebugLine "Result Columns: " & ResultArtikel & vbNewline
		AddDebugLine "Result Rows: " & ResultArtikel.RowCount & vbNewline
		AddDebugLine "SQL: " & SQL
		
		ShowDebugBox "ArticleExists"
	End If
	
	' ===================== SERIENNUMMER =====================
	SQL = ""
	' Artikelnummer
	SQL = SQL & "(C068 = '" & Identifier & "') AND "
	' Artikel darf nicht inaktiv sein
	SQL = SQL & "(c038 IS NULL) "
	' Nach Mandant und Wirtschaftsjahr filtern
	SQL = SQL & SQLQuery_BasicWhere
	
	Set ResultSeriennummer = CWLStart.CurrentCompany.SearchRecord(TABLE_21, SQL)
	
	If DEBUG_ON = True Then
		AddDebugLine "Searching for Article by Article serial number " & vbNewline 
		AddDebugLine "Result Columns: " & ResultSeriennummer 
		AddDebugLine "Result Rows: " & ResultSeriennummer.RowCount
		AddDebugLine "SQL: " & SQL
		
		ShowDebugBox "ArticleExists"
	End If
	
	If ResultSeriennummer.RowCount > 0 Then	
		SerialNumberString = ResultSeriennummer.Value("C068")
		MainArticleNumber = ResultSeriennummer.Value("C011")
		
		SQL = ""
		SQL = SQL & "(C002 = '" & MainArticleNumber & "') "
		' Nach Mandant und Wirtschaftsjahr filtern
		SQL = SQL & SQLQuery_BasicWhere
		
		Set ResultMainArticle = CWLStart.CurrentCompany.SearchRecord(TABLE_21, SQL)
		
		If ResultMainArticle.RowCount > 0 Then
			SerialNumberPattern = ResultMainArticle.Value("C222")
		End If
		
		If DEBUG_ON = True Then
			AddDebugLine "Preparing Regex Check. " & vbNewline
			AddDebugLine "SerialNumberString: " & SerialNumberString
			AddDebugLine "SerialNumberPattern: " & SerialNumberPattern
			AddDebugLine "MainArticleNumber: " & MainArticleNumber
			
			ShowDebugBox "ArticleExists"
		End If
		
		If Len(SerialNumberPattern) > 0 And Len(SerialNumberString) > 0 Then
			Set SerialNumberRegex = New Regexp
			With SerialNumberRegex
				.Pattern = SerialNumberPattern
				.IgnoreCase = False
				.Global = False
			End With
			
			Set RegexMatch = SerialNumberRegex.Execute(SerialNumberString)
			Set FirstMatch = RegexMatch.Item(0)
			
			If DEBUG_ON = True Then
				AddDebugLine "Checked Serialnumber against Regex. (1/2)" & vbNewline
				AddDebugLine "FirstMatch.Length: " & FirstMatch.Length
				AddDebugLine "Len(SerialNumberString): " & Len(SerialNumberString)
				AddDebugLine "FirstMatch.FirstIndex: " & FirstMatch.FirstIndex
				
				ShowDebugBox "ArticleExists"
			End If	
			
			If Not (FirstMatch.Length = Len(SerialNumberString) And FirstMatch.FirstIndex = 0) Then
				ArticleExists = ARTICLE_EXISTS_NO_REGEX_MATCH
				HasError = True
			End If
			
			If DEBUG_ON = True Then
				AddDebugLine "Checked Serialnumber against Regex. (2/2)" & vbNewline
				AddDebugLine "Result: " & SerialNumberRegex.Test(SerialNumberString) 
				AddDebugLine "Serialnumber: " & SerialNumberString
				AddDebugLine "Regex: " & SerialNumberPattern
				
				ShowDebugBox "ArticleExists"
			End If
		End If
	
		CURRENT_SERIALNUMBER = Identifier
		Set Result = ResultSeriennummer	
	Else
		Set Result = ResultArtikel
	End If
			
	'==========================================================
	If HasError = True Then
		' Just skip the rest of the function and return the current error
	Elseif Result.RowCount > 0 Then
		' Wir brauchen die Hauptartikelnummer, weil die Prüfung sonst bei SN-Artikeln fehlschlägt
		MainArticleNumber = Result.Value("C011")
		RealArticleNumber = Result.Value("C002")
		ProductShape = 0
		
		' Ausprägung des Artikels prüfen
		SQL = ""
		SQL = "SELECT c001 FROM t301 (NOLOCK) WHERE c003 = (SELECT c066 FROM v021 (NOLOCK) WHERE c002 = '" & RealArticleNumber & "' " & SQLQuery_BasicWhere & ")" & SQLQuery_BasicWhere
		
		If DEBUG_ON = True Then
			AddDebugLine "SQL: " & SQL
			
			ShowDebugBox "ArticleExists"
		End If
		
		Set Result = CWLStart.CurrentCompany.Connection.Select(SQL)
		
		If Result > -1 Then
			ProductShape = Result.Value("c001")
		Else
			ProductShape = 0		
		End If
		
		CURRENT_SHAPE = ProductShape
				
		' Lagerstand des Artikels prüfen
		SQL = ""
		SQL = SQL & "SELECT "		
		SQL = SQL & "(SELECT C008 AS [MengeZugang] from [v021] (NOLOCK) where (c002 = '__ARTICLENUMBER__') "& SQLQuery_BasicWhere &")"
		SQL = SQL & " - "
		SQL = SQL & "(SELECT C009 AS [MengeAbgang] from [v021] (NOLOCK) where (c002 = '__ARTICLENUMBER__') "& SQLQuery_BasicWhere &") "
		'SQL = SQL & " - "	
		'SQL = SQL & "ISNULL((SELECT SUM(C035) AS [MengeVerkauf] FROM [t014] (NOLOCK) where c000 = '__ARTICLENUMBER__' "& SQLQuery_BasicWhere &"), 0)"
		SQL = SQL & " AS c000"
		
		SQL = Replace(SQL, "__ARTICLENUMBER__", RealArticleNumber)
		
		If DEBUG_ON = True Then
			AddDebugLine "SQL: " & SQL
			
			ShowDebugBox "ArticleExists"
		End If
				
		Set Result = CWLStart.CurrentCompany.Connection.Select(SQL)
		AmountStocked = Result.Value("c000")
		
		If DEBUG_ON = True Then
			AddDebugLine "Checking stock of product: " & RealArticleNumber & " (" & MainArticleNumber & ")" & vbNewline
			AddDebugLine "Result Columns: " & Result
			AddDebugLine "Result Rows: " & Result.RowCount
			AddDebugLine "Stock: " & AmountStocked
			AddDebugLine "SQL: " & SQL
			
			ShowDebugBox "ArticleExists"
		End If
		
		If AmountStocked > 0 Then
			If DEBUG_ON = True Then
				AddDebugLine "Amount stocked: " & AmountStocked	
			End If
			
			' Vorkommen in Tabelle prüfen
			For Row = 1 To Grid.LineCount
				CurrentArticleNumber = Grid.GetCellValue(Row, COLUMN_ARTICLENUMBER)
				Total = Cint(Grid.GetCellValue(Row, COLUMN_TOTAL))
				Scanned = Cint(Grid.GetCellValue(Row, COLUMN_SCANNED))
				
				If CurrentArticleNumber = MainArticleNumber Then
					If DEBUG_ON = True Then
						AddDebugLine "CurrentArticleNumber matches MainArticleNumber! (" & CurrentArticleNumber & ")"
					End If
				
					If Total > Scanned Then
						If DEBUG_ON = True Then
							AddDebugLine "Product is not yet scanned completetly and exists in Row " & Row & "!"
						End If
					
						ArticleExists = Row
						Exit For
					End If
				End If
			Next	
		Else
			If DEBUG_ON = True Then
				AddDebugLine "Amount stocked: 0"
			End If
		
			ArticleExists = ARTICLE_EXISTS_NO_STOCK
		End If	
		
		If DEBUG_ON = True Then
			ShowDebugBox "ArticleExists"		
		End If		
	Else
		If CURRENT_SERIALNUMBER = "" Then
			ArticleExists = ARTICLE_EXISTS_NO_ARTICLE_EAN
		Else
			ArticleExists = ARTICLE_EXISTS_NO_SERIALNUMBER
		End If
	End If
	
End Function