Add example for iterating product id and product helper

examples/product_lister/main.go

@@ -0,0 +1,94 @@
+// Package main implements a simple demo program to
+// work with the csaf library.
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"github.com/gocsaf/csaf/v3/csaf"
+	"log"
+	"os"
+)
+
+func main() {
+	flag.Usage = func() {
+		if _, err := fmt.Fprintf(flag.CommandLine.Output(),
+			"Usage:\n  %s [OPTIONS] files...\n\nOptions:\n", os.Args[0]); err != nil {
+			log.Fatalf("error: %v\n", err)
+		}
+		flag.PrintDefaults()
+	}
+	printProductIdentHelper := flag.Bool("print_ident_helper", false, "print product helper mapping")
+	flag.Parse()
+
+	files := flag.Args()
+	if len(files) == 0 {
+		log.Println("No files given.")
+		return
+	}
+	if err := run(files, *printProductIdentHelper); err != nil {
+		log.Fatalf("error: %v\n", err)
+	}
+}
+
+// run prints all product IDs and their full_product_names and product_identification_helpers.
+func run(files []string, printProductIdentHelper bool) error {
+	for _, file := range files {
+		adv, err := csaf.LoadAdvisory(file)
+		if err != nil {
+			return fmt.Errorf("loading %q failed: %w", file, err)
+		}
+		if printProductIdentHelper {
+			printProductIdentHelperMapping(adv)
+		} else {
+			printProductIDMapping(adv)
+		}
+	}
+
+	return nil
+}
+
+// printProductIDMapping prints all product ids with their name and identification helper.
+func printProductIDMapping(adv *csaf.Advisory) {
+	type productNameHelperMapping struct {
+		fullProductName             *csaf.FullProductName
+		productIdentificationHelper *csaf.ProductIdentificationHelper
+	}
+
+	productIDMap := map[csaf.ProductID][]productNameHelperMapping{}
+	if fpns := adv.ProductTree.FullProductNames; fpns != nil {
+		for _, fpn := range *fpns {
+			if fpn != nil && fpn.ProductID != nil {
+				productIDMap[*fpn.ProductID] = append(productIDMap[*fpn.ProductID], productNameHelperMapping{
+					fullProductName:             fpn,
+					productIdentificationHelper: fpn.ProductIdentificationHelper,
+				})
+			}
+		}
+	}
+	jsonData, _ := json.MarshalIndent(productIDMap, "", "  ")
+	fmt.Println(string(jsonData))
+}
+
+// printProductIdentHelperMapping prints all product identifier helper with their product id.
+func printProductIdentHelperMapping(adv *csaf.Advisory) {
+	type productIdentIdMapping struct {
+		productNameHelperMapping csaf.ProductIdentificationHelper
+		productID                *csaf.ProductID
+	}
+
+	productIdentMap := []productIdentIdMapping{}
+	if fpns := adv.ProductTree.FullProductNames; fpns != nil {
+		for _, fpn := range *fpns {
+			if fpn != nil && fpn.ProductIdentificationHelper != nil {
+				productIdentMap = append(productIdentMap, productIdentIdMapping{
+					productNameHelperMapping: *fpn.ProductIdentificationHelper,
+					productID:                fpn.ProductID,
+				})
+			}
+		}
+	}
+	jsonData, _ := json.MarshalIndent(productIdentMap, "", "  ")
+	fmt.Println(string(jsonData))
+}