feat(pdfengines): add embed feature

pkg/modules/pdfengines/pdfengines.go

@@ -34,6 +34,7 @@ type PdfEngines struct {
 	readMetadataNames  []string
 	writeMetadataNames []string
 	encryptNames       []string
+	embedNames         []string
 	engines            []gotenberg.PdfEngine
 	disableRoutes      bool
 }
@@ -51,6 +52,7 @@ func (mod *PdfEngines) Descriptor() gotenberg.ModuleDescriptor {
 			fs.StringSlice("pdfengines-read-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the read metadata feature - empty means all")
 			fs.StringSlice("pdfengines-write-metadata-engines", []string{"exiftool"}, "Set the PDF engines and their order for the write metadata feature - empty means all")
 			fs.StringSlice("pdfengines-encrypt-engines", []string{"qpdf", "pdftk", "pdfcpu"}, "Set the PDF engines and their order for the password protection feature - empty means all")
+			fs.StringSlice("pdfengines-embed-engines", []string{"pdfcpu"}, "Set the PDF engines and their order for the file embedding feature - empty means all")
 			fs.Bool("pdfengines-disable-routes", false, "Disable the routes")
 
 			// Deprecated flags.
@@ -77,6 +79,7 @@ func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 	readMetadataNames := flags.MustStringSlice("pdfengines-read-metadata-engines")
 	writeMetadataNames := flags.MustStringSlice("pdfengines-write-metadata-engines")
 	encryptNames := flags.MustStringSlice("pdfengines-encrypt-engines")
+	embedNames := flags.MustStringSlice("pdfengines-embed-engines")
 	mod.disableRoutes = flags.MustBool("pdfengines-disable-routes")
 
 	engines, err := ctx.Modules(new(gotenberg.PdfEngine))
@@ -138,6 +141,11 @@ func (mod *PdfEngines) Provision(ctx *gotenberg.Context) error {
 		mod.encryptNames = encryptNames
 	}
 
+	mod.embedNames = defaultNames
+	if len(embedNames) > 0 {
+		mod.embedNames = embedNames
+	}
+
 	return nil
 }
 
@@ -192,6 +200,7 @@ func (mod *PdfEngines) Validate() error {
 	findNonExistingEngines(mod.readMetadataNames)
 	findNonExistingEngines(mod.writeMetadataNames)
 	findNonExistingEngines(mod.encryptNames)
+	findNonExistingEngines(mod.embedNames)
 
 	if len(nonExistingEngines) == 0 {
 		return nil
@@ -238,6 +247,7 @@ func (mod *PdfEngines) PdfEngine() (gotenberg.PdfEngine, error) {
 		engines(mod.readMetadataNames),
 		engines(mod.writeMetadataNames),
 		engines(mod.encryptNames),
+		engines(mod.embedNames),
 	), nil
 }
 
@@ -262,6 +272,7 @@ func (mod *PdfEngines) Routes() ([]api.Route, error) {
 		readMetadataRoute(engine),
 		writeMetadataRoute(engine),
 		encryptRoute(engine),
+		embedRoute(engine),
 	}, nil
 }