Update to 8.3.0 | MVC Models and Bindings and fix of #723 , read HISTORY.md

Former-commit-id: d8f66d8d370c583a288333df2a14c6ee2dc56466

mvc/activator/callable_control.go

@@ -0,0 +1,53 @@
+package activator
+
+import (
+	"reflect"
+
+	"github.com/kataras/iris/context"
+)
+
+func getCustomFuncIndex(t *TController, funcNames ...string) (funcIndex int, has bool) {
+	val := t.Value
+
+	for _, funcName := range funcNames {
+		if m, has := t.Type.MethodByName(funcName); has {
+			if _, isRequestFunc := val.Method(m.Index).Interface().(func(ctx context.Context)); isRequestFunc {
+				return m.Index, has
+			}
+		}
+	}
+
+	return -1, false
+}
+
+type callableControl struct {
+	Functions []string
+	index     int
+}
+
+func (cc *callableControl) Load(t *TController) error {
+	funcIndex, has := getCustomFuncIndex(t, cc.Functions...)
+	if !has {
+		return ErrControlSkip
+	}
+
+	cc.index = funcIndex
+	return nil
+}
+
+// the "c" is a new "c" instance
+// which is being used at serve time, inside the Handler.
+// it calls the custom function (can be "Init", "BeginRequest", "End" and "EndRequest"),
+// the check of this function made at build time, so it's a safe a call.
+func (cc *callableControl) Handle(ctx context.Context, c reflect.Value, methodFunc func()) {
+	c.Method(cc.index).Interface().(func(ctx context.Context))(ctx)
+}
+
+// CallableControl is a generic-propose `TControl`
+// which finds one function in the user's controller's struct
+// based on the possible "funcName(s)" and executes
+// that inside the handler, at serve-time, by passing
+// the current request's `iris/context/#Context`.
+func CallableControl(funcName ...string) TControl {
+	return &callableControl{Functions: funcName}
+}