Implement EAN and improve Code39 error handling

generation/ean.go

@@ -0,0 +1,20 @@
+package generation
+
+import (
+	"fmt"
+
+	"github.com/boombuler/barcode"
+	"github.com/boombuler/barcode/ean"
+)
+
+func generateEAN(parameters Parameters) (barcode.Barcode, error) {
+	var strippedBarcode barcode.Barcode
+	GeneratedBarcode, err := ean.Encode(parameters.Content)
+	if err != nil {
+		fmt.Println("Error creating Barcode", err)
+	} else {
+		strippedBarcode = GeneratedBarcode.(barcode.Barcode)
+	}
+
+	return strippedBarcode, err
+}