simplify by join the bind registration(ctx-transformer-to-something-func-binder and service one, which just sets the struct as it's) to one named 'In' and create a 'Child' which will return a new mvc instance with binders inheritanced from the parent one and add a simple test to the mvc_test.go - will have more later on

Former-commit-id: 81ae99390c683a61e1b0bac58725a04b9a3eebbb

mvc2/binder.go

@@ -68,29 +68,41 @@ func MustMakeFuncInputBinder(binder interface{}) *InputBinder {
 	return b
 }
 
+type binderType uint32
+
+const (
+	functionType binderType = iota
+	serviceType
+	invalidType
+)
+
+func resolveBinderType(binder interface{}) binderType {
+	if binder == nil {
+		return invalidType
+	}
+
+	switch indirectTyp(reflect.TypeOf(binder)).Kind() {
+	case reflect.Func:
+		return functionType
+	case reflect.Struct:
+		return serviceType
+	}
+
+	return invalidType
+}
+
 // MakeFuncInputBinder takes a binder function or a struct which contains a "Bind"
 // function and returns an `InputBinder`, which Iris uses to
 // resolve and set the input parameters when a handler is executed.
 //
 // The "binder" can have the following form:
-// `func(iris.Context) UserViewModel`
-// and a struct which contains a "Bind" method
-// of the same binder form that was described above.
+// `func(iris.Context) UserViewModel`.
 //
 // The return type of the "binder" should be a value instance, not a pointer, for your own protection.
 // The binder function should return only one value and
 // it can accept only one input argument, the Iris' Context (`context.Context` or `iris.Context`).
 func MakeFuncInputBinder(binder interface{}) (*InputBinder, error) {
 	v := reflect.ValueOf(binder)
-
-	// check if it's a struct or a pointer to a struct
-	// and contains a "Bind" method, if yes use that as the binder func.
-	if indirectTyp(v.Type()).Kind() == reflect.Struct {
-		if m := v.MethodByName("Bind"); m.IsValid() && m.CanInterface() {
-			v = m
-		}
-	}
-
 	return makeFuncInputBinder(v)
 }
 

mvc2/binder_test.go

@@ -22,15 +22,8 @@ func testBinderFunc(ctx context.Context) testUserStruct {
 	}
 }
 
-type testBinderStruct struct{}
-
-func (t *testBinderStruct) Bind(ctx context.Context) testUserStruct {
-	return testBinderFunc(ctx)
-}
-
 func TestMakeFuncInputBinder(t *testing.T) {
 	testMakeFuncInputBinder(t, testBinderFunc)
-	testMakeFuncInputBinder(t, new(testBinderStruct))
 }
 
 func testMakeFuncInputBinder(t *testing.T, binder interface{}) {

mvc2/handler_test.go

@@ -40,39 +40,51 @@ func (s *testServiceImpl) Say(message string) string {
 	return s.prefix + " " + message
 }
 
+var (
+	// binders, as user-defined
+	testBinderFuncUserStruct = testBinderFunc
+	testBinderService        = &testServiceImpl{prefix: "say"}
+	testBinderFuncParam      = func(ctx iris.Context) string {
+		return ctx.Params().Get("param")
+	}
+
+	// consumers
+	// a context as first input arg, which is not needed to be binded manually,
+	// and a user struct which is binded to the input arg by the #1 func(ctx) any binder.
+	testConsumeUserHandler = func(ctx iris.Context, user testUserStruct) {
+		ctx.JSON(user)
+	}
+
+	// just one input arg, the service which is binded by the #2 service binder.
+	testConsumeServiceHandler = func(service testService) string {
+		return service.Say("something")
+	}
+	// just one input arg, a standar string which is binded by the #3 func(ctx) any binder.
+	testConsumeParamHandler = func(myParam string) string {
+		return "param is: " + myParam
+	}
+)
+
 func TestMakeHandler(t *testing.T) {
 	binders := []*InputBinder{
 		// #1
-		MustMakeFuncInputBinder(testBinderFunc),
+		MustMakeFuncInputBinder(testBinderFuncUserStruct),
 		// #2
-		MustMakeServiceInputBinder(&testServiceImpl{prefix: "say"}),
+		MustMakeServiceInputBinder(testBinderService),
 		// #3
-		MustMakeFuncInputBinder(func(ctx iris.Context) string {
-			return ctx.Params().Get("param")
-		}),
+		MustMakeFuncInputBinder(testBinderFuncParam),
 	}
 
 	var (
-		// a context as first input arg, which is not needed to be binded manually,
-		// and a user struct which is binded to the input arg by the #1 func(ctx) any binder.
-		consumeUserHandler = func(ctx iris.Context, user testUserStruct) {
-			ctx.JSON(user)
-		}
-		h1 = MustMakeHandler(consumeUserHandler, binders)
-
-		// just one input arg, the service which is binded by the #2 service binder.
-		consumeServiceHandler = func(service testService) string {
-			return service.Say("something")
-		}
-		h2 = MustMakeHandler(consumeServiceHandler, binders)
-
-		// just one input arg, a standar string which is binded by the #3 func(ctx) any binder.
-		consumeParamHandler = func(myParam string) string {
-			return "param is: " + myParam
-		}
-		h3 = MustMakeHandler(consumeParamHandler, binders)
+		h1 = MustMakeHandler(testConsumeUserHandler, binders)
+		h2 = MustMakeHandler(testConsumeServiceHandler, binders)
+		h3 = MustMakeHandler(testConsumeParamHandler, binders)
 	)
 
+	testAppWithMvcHandlers(t, h1, h2, h3)
+}
+
+func testAppWithMvcHandlers(t *testing.T, h1, h2, h3 iris.Handler) {
 	app := iris.New()
 	app.Get("/{id:long}/{username:string}", h1)
 	app.Get("/service", h2)

mvc2/mvc.go

@@ -20,28 +20,44 @@ func New() *Mvc {
 	return new(Mvc)
 }
 
-func (m *Mvc) RegisterBinder(binders ...interface{}) error {
-	for _, binder := range binders {
-		b, err := MakeFuncInputBinder(binder)
-		if err != nil {
-			return err
+func (m *Mvc) Child() *Mvc {
+	child := New()
+
+	// copy the current parent's ctx func binders and services to this new child.
+	if len(m.binders) > 0 {
+		binders := make([]*InputBinder, len(m.binders), len(m.binders))
+		for i, v := range m.binders {
+			binders[i] = v
 		}
-		m.binders = append(m.binders, b)
+		child.binders = binders
 	}
 
-	return nil
+	return child
 }
 
-func (m *Mvc) RegisterService(services ...interface{}) error {
-	for _, service := range services {
-		b, err := MakeServiceInputBinder(service)
-		if err != nil {
-			return err
+func (m *Mvc) In(binders ...interface{}) {
+	for _, binder := range binders {
+		typ := resolveBinderType(binder)
+
+		var (
+			b   *InputBinder
+			err error
+		)
+
+		if typ == functionType {
+			b, err = MakeFuncInputBinder(binder)
+		} else if typ == serviceType {
+			b, err = MakeServiceInputBinder(binder)
+		} else {
+			err = errBad
 		}
+
+		if err != nil {
+			continue
+		}
+
 		m.binders = append(m.binders, b)
 	}
-
-	return nil
 }
 
 func (m *Mvc) Handler(handler interface{}) context.Handler {

mvc2/mvc_test.go

@@ -0,0 +1,22 @@
+package mvc2_test
+
+// black-box in combination with the handler_test
+
+import (
+	"testing"
+
+	. "github.com/kataras/iris/mvc2"
+)
+
+func TestMvcInAndHandler(t *testing.T) {
+	m := New()
+	m.In(testBinderFuncUserStruct, testBinderService, testBinderFuncParam)
+
+	var (
+		h1 = m.Handler(testConsumeUserHandler)
+		h2 = m.Handler(testConsumeServiceHandler)
+		h3 = m.Handler(testConsumeParamHandler)
+	)
+
+	testAppWithMvcHandlers(t, h1, h2, h3)
+}