Site: add config UI (BC) (#9812)

server/http_config_metadata_handler.go

@@ -0,0 +1,82 @@
+package server
+
+import (
+	"net/http"
+	"slices"
+	"strings"
+
+	"github.com/evcc-io/evcc/util/templates"
+	"github.com/gorilla/mux"
+)
+
+// templatesHandler returns the list of templates by class
+func templatesHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	class, err := templates.ClassString(vars["class"])
+	if err != nil {
+		jsonError(w, http.StatusBadRequest, err)
+		return
+	}
+
+	lang := r.URL.Query().Get("lang")
+	templates.EncoderLanguage(lang)
+
+	if name := r.URL.Query().Get("name"); name != "" {
+		res, err := templates.ByName(class, name)
+		if err != nil {
+			jsonError(w, http.StatusBadRequest, err)
+			return
+		}
+
+		jsonResult(w, res)
+		return
+	}
+
+	jsonResult(w, templates.ByClass(class))
+}
+
+// productsHandler returns the list of products by class
+func productsHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	class, err := templates.ClassString(vars["class"])
+	if err != nil {
+		jsonError(w, http.StatusBadRequest, err)
+		return
+	}
+
+	tmpl := templates.ByClass(class)
+	lang := r.URL.Query().Get("lang")
+	usage := r.URL.Query().Get("usage")
+
+	res := make(products, 0)
+	for _, t := range tmpl {
+		// if usage filter is specified, only include templates with matching usage
+		includeUsage := usage == ""
+		if !includeUsage {
+			for _, u := range t.Usages() {
+				if u == usage {
+					includeUsage = true
+					break
+				}
+			}
+		}
+
+		if includeUsage {
+			for _, p := range t.Products {
+				res = append(res, product{
+					Name:     p.Title(lang),
+					Template: t.TemplateDefinition.Template,
+					Group:    t.Group,
+				})
+			}
+		}
+	}
+
+	slices.SortFunc(res, func(a, b product) int {
+		return strings.Compare(strings.ToLower(a.Name), strings.ToLower(b.Name))
+	})
+
+	jsonResult(w, res)
+}