initial

structscanner.go

@@ -0,0 +1,28 @@
+package webutil
+
+import (
+	"errors"
+	"net/url"
+	"reflect"
+)
+
+// ScanStruct scans form values into the exported fields of dest (must be a
+// pointer to a struct) using field names as form keys. Bool fields are set to
+// true when the key is present, matching HTML checkbox behaviour.
+func ScanStruct(form url.Values, dest any) error {
+	v := reflect.ValueOf(dest)
+	if v.Kind() != reflect.Ptr || v.Elem().Kind() != reflect.Struct {
+		return errors.New("ScanStruct: dest must be a pointer to a struct")
+	}
+	v = v.Elem()
+
+	s := NewFormScanner(form)
+	for key := range form {
+		fv := v.FieldByName(key)
+		if !fv.IsValid() || !fv.CanSet() {
+			continue
+		}
+		s.Scan(key, fv.Addr().Interface())
+	}
+	return s.Error()
+}