🚀 add Party.OnErrorFunc, UseFunc and DoneFunc to be aligned with the new HandleFunc

Former-commit-id: 381ce0f86f376ef7652b5e918474f9e37b391781

HISTORY.md

@@ -70,7 +70,70 @@ func main() {
 }
 ```
 
-Your eyes don't lie you. You read well, no `ctx.ReadJSON(&v)` and `ctx.JSON(send)` neither `error` handling are presented. It is a huge relief but don't worry you can still control everything if you ever need, even errors from dependencies. Any error may occur from request-scoped dependencies or your own handler is dispatched through `Party.GetContainer().GetErrorHandler` which defaults to the `hero.DefaultErrorHandler` which sends a `400 Bad Request` response with the error's text as its body contents. If you want to handle `testInput` otherwise then just add a `Party.RegisterDependency(func(ctx iris.Context) testInput {...})` and you are ready to go.
+Your eyes don't lie you. You read well, no `ctx.ReadJSON(&v)` and `ctx.JSON(send)` neither `error` handling are presented. It is a huge relief but don't worry you can still control everything if you ever need, even errors from dependencies. Any error may occur from request-scoped dependencies or your own handler is dispatched through `Party.GetContainer().GetErrorHandler` which defaults to the `hero.DefaultErrorHandler` which sends a `400 Bad Request` response with the error's text as its body contents, you can change it through `Party#OnErrorFunc`. If you want to handle `testInput` otherwise then just add a `Party.RegisterDependency(func(ctx iris.Context) testInput {...})` and you are ready to go. Here is a quick list of the new Party's methods:
+
+```go
+// GetContainer returns the DI Container of this Party.
+// Use it to manually convert functions or structs(controllers) to a Handler.
+//
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
+GetContainer() *hero.Container
+```
+```go
+// OnErrorFunc adds an error handler for this Party's DI Hero Container and its handlers (or controllers).
+// The "errorHandler" handles any error may occurred and returned
+// during dependencies injection of the Party's hero handlers or from the handlers themselves.
+//
+// Same as:
+// GetContainer().GetErrorHandler = func(ctx iris.Context) hero.ErrorHandler { return errorHandler }
+//
+// See `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
+OnErrorFunc(errorHandler func(context.Context, error))
+```
+```go
+// RegisterDependency adds a dependency.
+// The value can be a single struct value or a function.
+// Follow the rules:
+// * <T> {structValue}
+// * func(accepts <T>)                                 returns <D> or (<D>, error)
+// * func(accepts iris.Context)                        returns <D> or (<D>, error)
+// * func(accepts1 iris.Context, accepts2 *hero.Input) returns <D> or (<D>, error)
+//
+// A Dependency can accept a previous registered dependency and return a new one or the same updated.
+// * func(accepts1 <D>, accepts2 <T>)                  returns <E> or (<E>, error) or error
+// * func(acceptsPathParameter1 string, id uint64)     returns <T> or (<T>, error)
+//
+// Usage:
+//
+// - RegisterDependency(loggerService{prefix: "dev"})
+// - RegisterDependency(func(ctx iris.Context) User {...})
+// - RegisterDependency(func(User) OtherResponse {...})
+//
+// See `OnErrorFunc`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
+RegisterDependency(dependency interface{})
+```
+```go
+// UseFunc same as "Use" but it accepts dynamic functions as its "handlersFn" input.
+// See `OnErrorFunc`, `RegisterDependency`, `DoneFunc` and `HandleFunc` for more.
+UseFunc(handlersFn ...interface{})
+// DoneFunc same as "Done" but it accepts dynamic functions as its "handlersFn" input.
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `HandleFunc` for more.
+DoneFunc(handlersFn ...interface{})
+```
+```go
+// HandleFunc same as `HandleFunc` but it accepts one or more "handlersFn" functions which each one of them
+// can accept any input arguments that match with the Party's registered Container's `Dependencies` and
+// any output result; like custom structs <T>, string, []byte, int, error,
+// a combination of the above, hero.Result(hero.View | hero.Response) and more.
+//
+// It's common from a hero handler to not even need to accept a `Context`, for that reason,
+// the "handlersFn" will call `ctx.Next()` automatically when not called manually.
+// To stop the execution and not continue to the next "handlersFn"
+// the end-developer should output an error and return `iris.ErrStopExecution`.
+//
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `DoneFunc` too.
+HandleFunc(method, relativePath string, handlersFn ...interface{}) *Route
+```
 
 Other Improvements:
 

core/router/api_builder.go

@@ -252,11 +252,26 @@ func (api *APIBuilder) SetRegisterRule(rule RouteRegisterRule) Party {
 // GetContainer returns the DI Container of this Party.
 // Use it to manually convert functions or structs(controllers) to a Handler.
 //
-// See `RegisterDependency` and `HandleFunc` too.
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
 func (api *APIBuilder) GetContainer() *hero.Container {
 	return api.container
 }
 
+// OnErrorFunc adds an error handler for this Party's DI Hero Container and its handlers (or controllers).
+// The "errorHandler" handles any error may occurred and returned
+// during dependencies injection of the Party's hero handlers or from the handlers themselves.
+//
+// Same as:
+// GetContainer().GetErrorHandler = func(ctx iris.Context) hero.ErrorHandler { return errorHandler }
+//
+// See `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
+func (api *APIBuilder) OnErrorFunc(errorHandler func(context.Context, error)) {
+	errHandler := hero.ErrorHandlerFunc(errorHandler)
+	api.GetContainer().GetErrorHandler = func(ctx context.Context) hero.ErrorHandler {
+		return errHandler
+	}
+}
+
 // RegisterDependency adds a dependency.
 // The value can be a single struct value or a function.
 // Follow the rules:
@@ -274,20 +289,14 @@ func (api *APIBuilder) GetContainer() *hero.Container {
 // - RegisterDependency(loggerService{prefix: "dev"})
 // - RegisterDependency(func(ctx iris.Context) User {...})
 // - RegisterDependency(func(User) OtherResponse {...})
+//
+// See `OnErrorFunc`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
 func (api *APIBuilder) RegisterDependency(dependency interface{}) *hero.Dependency {
 	return api.container.Register(dependency)
 }
 
-// HandleFunc accepts one or more "handlersFn" functions which each one of them
+// convertHandlerFuncs accepts Iris hero handlers and returns a slice of native Iris handlers.
-// can accept any input arguments that match with the Party's registered Container's `Dependencies` and
+func (api *APIBuilder) convertHandlerFuncs(handlersFn ...interface{}) context.Handlers {
-// any output result; like custom structs <T>, string, []byte, int, error,
-// a combination of the above, hero.Result(hero.View | hero.Response) and more.
-//
-// It's common from a hero handler to not even need to accept a `Context`, for that reason,
-// the "handlersFn" will call `ctx.Next()` automatically when not called manually.
-// To stop the execution and not continue to the next "handlersFn"
-// the end-developer should output an error and return `iris.ErrStopExecution`.
-func (api *APIBuilder) HandleFunc(method, relativePath string, handlersFn ...interface{}) *Route {
 	handlers := make(context.Handlers, 0, len(handlersFn))
 	for _, h := range handlersFn {
 		handlers = append(handlers, api.container.Handler(h))
@@ -298,6 +307,22 @@ func (api *APIBuilder) HandleFunc(method, relativePath string, handlersFn ...int
 	o := ExecutionOptions{Force: true}
 	o.apply(&handlers)
 
+	return handlers
+}
+
+// HandleFunc same as `HandleFunc` but it accepts one or more "handlersFn" functions which each one of them
+// can accept any input arguments that match with the Party's registered Container's `Dependencies` and
+// any output result; like custom structs <T>, string, []byte, int, error,
+// a combination of the above, hero.Result(hero.View | hero.Response) and more.
+//
+// It's common from a hero handler to not even need to accept a `Context`, for that reason,
+// the "handlersFn" will call `ctx.Next()` automatically when not called manually.
+// To stop the execution and not continue to the next "handlersFn"
+// the end-developer should output an error and return `iris.ErrStopExecution`.
+//
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `DoneFunc` too.
+func (api *APIBuilder) HandleFunc(method, relativePath string, handlersFn ...interface{}) *Route {
+	handlers := api.convertHandlerFuncs(handlersFn...)
 	return api.Handle(method, relativePath, handlers...)
 }
 
@@ -714,6 +739,14 @@ func (api *APIBuilder) Use(handlers ...context.Handler) {
 	api.middleware = append(api.middleware, handlers...)
 }
 
+// UseFunc same as "Use" but it accepts dynamic functions as its "handlersFn" input.
+//
+// See `OnErrorFunc`, `RegisterDependency`, `DoneFunc` and `HandleFunc` for more.
+func (api *APIBuilder) UseFunc(handlersFn ...interface{}) {
+	handlers := api.convertHandlerFuncs(handlersFn...)
+	api.Use(handlers...)
+}
+
 // UseGlobal registers handlers that should run at the very beginning.
 // It prepends those handler(s) to all routes,
 // including all parties, subdomains.
@@ -740,6 +773,13 @@ func (api *APIBuilder) Done(handlers ...context.Handler) {
 	api.doneHandlers = append(api.doneHandlers, handlers...)
 }
 
+// DoneFunc same as "Done" but it accepts dynamic functions as its "handlersFn" input.
+// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `HandleFunc` for more.
+func (api *APIBuilder) DoneFunc(handlersFn ...interface{}) {
+	handlers := api.convertHandlerFuncs(handlersFn...)
+	api.Done(handlers...)
+}
+
 // DoneGlobal registers handlers that should run at the very end.
 // It appends those handler(s) to all routes,
 // including all parties, subdomains.

core/router/party.go

@@ -57,10 +57,15 @@ type Party interface {
 	// Use appends Handler(s) to the current Party's routes and child routes.
 	// If the current Party is the root, then it registers the middleware to all child Parties' routes too.
 	Use(middleware ...context.Handler)
-
+	// UseFunc same as "Use" but it accepts dynamic functions as its "handlersFn" input.
+	// See `OnErrorFunc`, `RegisterDependency`, `DoneFunc` and `HandleFunc` for more.
+	UseFunc(handlersFn ...interface{})
 	// Done appends to the very end, Handler(s) to the current Party's routes and child routes.
 	// The difference from .Use is that this/or these Handler(s) are being always running last.
 	Done(handlers ...context.Handler)
+	// DoneFunc same as "Done" but it accepts dynamic functions as its "handlersFn" input.
+	// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `HandleFunc` for more.
+	DoneFunc(handlersFn ...interface{})
 	// Reset removes all the begin and done handlers that may derived from the parent party via `Use` & `Done`,
 	// and the execution rules.
 	// Note that the `Reset` will not reset the handlers that are registered via `UseGlobal` & `DoneGlobal`.
@@ -106,8 +111,17 @@ type Party interface {
 	// GetContainer returns the DI Container of this Party.
 	// Use it to manually convert functions or structs(controllers) to a Handler.
 	//
-	// See `RegisterDependency` and `HandleFunc` too.
+	// See `OnErrorFunc`, `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
 	GetContainer() *hero.Container
+	// OnErrorFunc adds an error handler for this Party's DI Hero Container and its handlers (or controllers).
+	// The "errorHandler" handles any error may occurred and returned
+	// during dependencies injection of the Party's hero handlers or from the handlers themselves.
+	//
+	// Same as:
+	// GetContainer().GetErrorHandler = func(ctx iris.Context) hero.ErrorHandler { return errorHandler }
+	//
+	// See `RegisterDependency`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
+	OnErrorFunc(errorHandler func(context.Context, error))
 	// RegisterDependency adds a dependency.
 	// The value can be a single struct value or a function.
 	// Follow the rules:
@@ -125,8 +139,10 @@ type Party interface {
 	// - RegisterDependency(loggerService{prefix: "dev"})
 	// - RegisterDependency(func(ctx iris.Context) User {...})
 	// - RegisterDependency(func(User) OtherResponse {...})
+	//
+	// See `OnErrorFunc`, `UseFunc`, `DoneFunc` and `HandleFunc` too.
 	RegisterDependency(dependency interface{}) *hero.Dependency
-	// HandleFunc accepts one or more "handlersFn" functions which each one of them
+	// HandleFunc same as `HandleFunc` but it accepts one or more "handlersFn" functions which each one of them
 	// can accept any input arguments that match with the Party's registered Container's `Dependencies` and
 	// any output result; like custom structs <T>, string, []byte, int, error,
 	// a combination of the above, hero.Result(hero.View | hero.Response) and more.
@@ -135,6 +151,8 @@ type Party interface {
 	// the "handlersFn" will call `ctx.Next()` automatically when not called manually.
 	// To stop the execution and not continue to the next "handlersFn"
 	// the end-developer should output an error and return `iris.ErrStopExecution`.
+	//
+	// See `OnErrorFunc`, `RegisterDependency`, `UseFunc` and `DoneFunc` too.
 	HandleFunc(method, relativePath string, handlersFn ...interface{}) *Route
 
 	// Handle registers a route to the server's router.