feat: read invoicer contact

Author: Suesswarendieb

ZUGFeRD/InvoiceDescriptor23CIIReader.cs

@@ -247,6 +247,18 @@ public override InvoiceDescriptor Load(Stream stream)
             }
 
             retval.Invoicer = _nodeAsParty(doc.DocumentElement, "//ram:ApplicableHeaderTradeSettlement/ram:InvoicerTradeParty", nsmgr);
+            if (doc.SelectSingleNode("//ram:InvoicerTradeParty/ram:DefinedTradeContact", nsmgr) != null)
+            {
+                retval.InvoicerContact = new Contact()
+                {
+                    Name = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:InvoicerTradeParty/ram:DefinedTradeContact/ram:PersonName", nsmgr),
+                    OrgUnit = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:InvoicerTradeParty/ram:DefinedTradeContact/ram:DepartmentName", nsmgr),
+                    PhoneNo = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:InvoicerTradeParty/ram:DefinedTradeContact/ram:TelephoneUniversalCommunication/ram:CompleteNumber", nsmgr),
+                    FaxNo = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:InvoicerTradeParty/ram:DefinedTradeContact/ram:FaxUniversalCommunication/ram:CompleteNumber", nsmgr),
+                    EmailAddress = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:InvoicerTradeParty/ram:DefinedTradeContact/ram:EmailURIUniversalCommunication/ram:URIID", nsmgr)
+                };
+            }
+
             retval.Payee = _nodeAsParty(doc.DocumentElement, "//ram:ApplicableHeaderTradeSettlement/ram:PayeeTradeParty", nsmgr);
 
             retval.PaymentReference = XmlUtils.NodeAsString(doc.DocumentElement, "//ram:ApplicableHeaderTradeSettlement/ram:PaymentReference", nsmgr);
@@ -299,7 +311,7 @@ public override InvoiceDescriptor Load(Stream stream)
                     bankleitzahl: i < creditorFinancialInstitutions.Count ? XmlUtils.NodeAsString(creditorFinancialInstitutions[i], ".//ram:GermanBankleitzahlID", nsmgr) : string.Empty,
                     bankName: i < creditorFinancialInstitutions.Count ? XmlUtils.NodeAsString(creditorFinancialInstitutions[i], ".//ram:Name", nsmgr) : string.Empty,
                     name: i < creditorFinancialAccountNodes.Count ? XmlUtils.NodeAsString(creditorFinancialAccountNodes[i], ".//ram:AccountName", nsmgr) : string.Empty);
-            } // !for(i) 
+            } // !for(i)
 
 
             var specifiedTradeSettlementPaymentMeansNodes = doc.SelectNodes("//ram:ApplicableHeaderTradeSettlement/ram:SpecifiedTradeSettlementPaymentMeans", nsmgr);