make generic form parser

pkg/web/handler/forms.go

@@ -0,0 +1,30 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/go-playground/form/v4"
+	"github.com/go-playground/validator/v10"
+)
+
+var (
+	decoder  = form.NewDecoder()
+	validate = validator.New(validator.WithRequiredStructEnabled())
+)
+
+func ParseForm[T any](r *http.Request) (*T, error) {
+	if err := r.ParseForm(); err != nil {
+		return nil, err
+	}
+
+	var data T
+	if err := decoder.Decode(&data, r.PostForm); err != nil {
+		return nil, err
+	}
+
+	return &data, nil
+}
+
+func ValidateForm[T any](data *T) error {
+	return validate.Struct(data)
+}