feat: dix all pdf problems. Validator now green

lib/xmp.go

@@ -11,27 +11,120 @@ const (
 	FacturXPrefix    = "fx:"
 )
 
+type PDFAProperty struct {
+	Name        string `xmp:"pdfaProperty:name"`
+	ValueType   string `xmp:"pdfaProperty:valueType"`
+	Category    string `xmp:"pdfaProperty:category"`
+	Description string `xmp:"pdfaProperty:description"`
+}
+
+type PDFASchema struct {
+	Schema       string         `xmp:"pdfaSchema:schema"`
+	NamespaceURI string         `xmp:"pdfaSchema:namespaceURI"`
+	Prefix       string         `xmp:"pdfaSchema:prefix"`
+	Property     []PDFAProperty `xmp:"pdfaSchema:property"`
+}
+
+type PDFAExtensionData struct {
+	Schemas [1]PDFASchema `xmp:"pdfaExtension:schemas,bag"`
+}
+
+type PDFAExtensionModel struct {
+	PDFAExtensionData
+
+	xmpbase.XmpBase
+}
+
+func (x PDFAExtensionModel) Can(nsName string) bool {
+	return nsName == "pdfaExtension"
+}
+
+func (x PDFAExtensionModel) Namespaces() xmp.NamespaceList {
+	return xmp.NamespaceList{
+		{
+			Name:    "pdfaSchema",
+			URI:     "http://www.aiim.org/pdfa/ns/schema#",
+			Factory: defaultFactory,
+		},
+		{
+			Name:    "pdfaExtension",
+			URI:     "http://www.aiim.org/pdfa/ns/extension/",
+			Factory: defaultFactory,
+		},
+		{
+			Name:    "pdfaProperty",
+			URI:     "http://www.aiim.org/pdfa/ns/property#",
+			Factory: defaultFactory,
+		},
+	}
+}
+
+func defaultFactory(name string) xmp.Model {
+	return nil
+}
+
 func addFacturXXmpData(data []byte) ([]byte, error) {
+	// --- Register Factur-X namespace ---
+	xmp.Register(&xmp.Namespace{
+		Name:    "fx",
+		URI:     FacturXUri,
+		Factory: defaultFactory,
+	})
+
 	doc := &xmp.Document{}
 	err := xmp.Unmarshal(data, doc)
 	if err != nil {
 		return nil, err
 	}
 
-	// --- Register Factur-X namespace ---
-	ns := &xmp.Namespace{
-		Name: "fx",
-		URI:  FacturXUri,
-		Factory: func(name string) xmp.Model {
-			return &xmpbase.XmpBase{}
+	model := &PDFAExtensionModel{
+		PDFAExtensionData: PDFAExtensionData{
+			Schemas: [1]PDFASchema{
+				{
+					Schema:       "Factur-X PDFA Extension Schema",
+					NamespaceURI: "urn:factur-x:pdfa:CrossIndustryDocument:invoice:1p0#",
+					Prefix:       "fx",
+					Property: []PDFAProperty{
+						{
+							Name:        "DocumentType",
+							ValueType:   "Text",
+							Category:    "external",
+							Description: "Factur-X document type",
+						},
+						{
+							Name:        "DocumentFileName",
+							ValueType:   "Text",
+							Category:    "external",
+							Description: "Attached XML file name",
+						},
+						{
+							Name:        "Version",
+							ValueType:   "Text",
+							Category:    "external",
+							Description: "Factur-X version",
+						},
+						{
+							Name:        "ConformanceLevel",
+							ValueType:   "Text",
+							Category:    "external",
+							Description: "Factur-X profile",
+						},
+					},
+				},
+			},
 		},
 	}
-	xmp.Register(ns)
-	_, err = doc.MakeModel(ns)
+	_, err = doc.AddModel(model)
 	if err != nil {
 		return nil, err
 	}
 
+	doc.FindModel(&xmp.Namespace{
+		Name:    "",
+		URI:     "",
+		Factory: nil,
+	})
+
 	// --- Set Factur-X properties ---
 	err = doc.SetPath(xmp.PathValue{
 		Path:      FacturXPrefix + "ConformanceLevel",