refactor: remove empty services (#116)

* remove empty services

* remove old factory

* remove old static files

* cleanup more duplicate service code

* file/folder reorg

backend/internal/sys/validate/validate.go

@@ -0,0 +1,37 @@
+package validate
+
+import "github.com/go-playground/validator/v10"
+
+var validate *validator.Validate
+
+func init() {
+	validate = validator.New()
+}
+
+// Checks a struct for validation errors and returns any errors the occur. This
+// wraps the validate.Struct() function and provides some error wrapping. When
+// a validator.ValidationErrors is returned, it is wrapped transformed into a
+// FieldErrors array and returned.
+func Check(val any) error {
+	err := validate.Struct(val)
+
+	if err != nil {
+		verrors, ok := err.(validator.ValidationErrors)
+		if !ok {
+			return err
+		}
+
+		fields := make(FieldErrors, 0, len(verrors))
+		for _, verr := range verrors {
+			field := FieldError{
+				Field: verr.Field(),
+				Error: verr.Error(),
+			}
+
+			fields = append(fields, field)
+		}
+		return fields
+	}
+
+	return nil
+}