UI: fix duplicate product entries (#13709)

util/templates/class.go

@@ -2,7 +2,7 @@ package templates
 
 type Class int
 
-//go:generate enumer -type Class
+//go:generate enumer -type Class -transform=lower
 const (
 	_ Class = iota
 	Charger

util/templates/init.go

@@ -5,7 +5,6 @@ import (
 	"embed"
 	"fmt"
 	"io/fs"
-	"path"
 	"slices"
 	"sync"
 	"text/template"
@@ -33,8 +32,8 @@ func init() {
 
 	baseTmpl = template.Must(template.ParseFS(includeFS, "includes/*.tpl"))
 
-	for _, class := range ClassValues() {
-		loadTemplates(class)
+	for _, class := range []Class{Charger, Meter, Vehicle, Tariff} {
+		templates[class] = load(class)
 	}
 }
 
@@ -66,12 +65,8 @@ func FromBytes(b []byte) (Template, error) {
 	return tmpl, err
 }
 
-func loadTemplates(class Class) {
-	if templates[class] != nil {
-		return
-	}
-
-	err := fs.WalkDir(definition.YamlTemplates, ".", func(filepath string, d fs.DirEntry, err error) error {
+func load(class Class) (res []Template) {
+	err := fs.WalkDir(definition.YamlTemplates, class.String(), func(filepath string, d fs.DirEntry, err error) error {
 		if err != nil {
 			return err
 		}
@@ -89,18 +84,15 @@ func loadTemplates(class Class) {
 			return fmt.Errorf("processing template '%s' failed: %w", filepath, err)
 		}
 
-		class, err := ClassString(path.Dir(filepath))
-		if err != nil {
-			return fmt.Errorf("invalid template class: '%s'", err)
-		}
-
-		templates[class] = append(templates[class], tmpl)
+		res = append(res, tmpl)
 
 		return nil
 	})
 	if err != nil {
 		panic(err)
 	}
+
+	return res
 }
 
 // EncoderLanguage sets the template language for encoding json