refactor: dynamic validation of the function and its parameters now it's with anticipation

Author: ralvarezdev

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/ralvarezdev/go-flags v0.3.1
 	github.com/ralvarezdev/go-jwt v0.4.8
 	github.com/ralvarezdev/go-logger v0.4.5
-	github.com/ralvarezdev/go-reflect v0.2.1
+	github.com/ralvarezdev/go-reflect v0.2.3
 	github.com/ralvarezdev/go-validator v0.5.22
 )
 

go.sum

@@ -6,8 +6,8 @@ github.com/ralvarezdev/go-jwt v0.4.8 h1:ugZ0Lyfen7QzmgweLnJynya3yih8rPev48Xjj7HY
 github.com/ralvarezdev/go-jwt v0.4.8/go.mod h1:RGGbn72uT5av5Hlo50H4xSXg6chmnpecl/a2yGAFNzQ=
 github.com/ralvarezdev/go-logger v0.4.5 h1:Lw7DdZUb4YSQDA7J9nv79soojw1eFHVVzO8wdE9d+Qg=
 github.com/ralvarezdev/go-logger v0.4.5/go.mod h1:vq47onxpED19/o3dh5/YbBKK0eZhqJENPgACYkqNNi8=
-github.com/ralvarezdev/go-reflect v0.2.1 h1:Q200FruGvc8INRRpnmvK+iRKTnCslRAWnwGAj1fXMak=
-github.com/ralvarezdev/go-reflect v0.2.1/go.mod h1:jv3EqQfUixWtNeJd/Rnzf0IDcYZ1z3GApRdAGQHdHZQ=
+github.com/ralvarezdev/go-reflect v0.2.3 h1:WXtgMbZ1LFKjyzi2W3JetgQCJcT/N2erDv12ZZaaLBI=
+github.com/ralvarezdev/go-reflect v0.2.3/go.mod h1:jv3EqQfUixWtNeJd/Rnzf0IDcYZ1z3GApRdAGQHdHZQ=
 github.com/ralvarezdev/go-strings v0.1.6 h1:NWI+XCipWaOo0vhSNpZz+7Eb4igk/GXD5RaFsk4ZPqY=
 github.com/ralvarezdev/go-strings v0.1.6/go.mod h1:8sFOqmPJpqzS7bTjf91EzUCITnwpmkfifwY80GxV5r8=
 github.com/ralvarezdev/go-validator v0.5.22 h1:mjvWKwhQyqQ6FwJUWIPfsywjOK0nMYf7HKDYAojh1xo=

http/middleware/validator/errors.go

@@ -5,6 +5,8 @@ import (
 )
 
 var (
-	ErrNilValidateFn     = errors.New("validate function is nil")
-	ErrInvalidValidateFn = errors.New("validate function is invalid")
+	ErrNilValidateFn       = errors.New("validate function is nil")
+	ErrInvalidValidateFn   = errors.New("validate function is invalid")
+	ErrNilCreateValidateFn = errors.New("create validate function is nil")
+	ErrNilParametersValues = errors.New("parameters value is nil")
 )

http/middleware/validator/middleware.go

@@ -45,6 +45,8 @@ func (m *Middleware) Validate(
 	// Dereference the body type if it is a pointer
 	if bodyType.Kind() == reflect.Pointer {
 		bodyType = bodyType.Elem()
+	} else {
+		body = &body
 	}
 
 	// Create the mapper
@@ -53,17 +55,37 @@ func (m *Middleware) Validate(
 		panic(err)
 	}
 
+	// Check if the createValidateFn is valid
+	if createValidateFn == nil {
+		panic(ErrNilCreateValidateFn)
+	}
+
+	// Check if the type of the createValidateFn is a function and the parameters are correct
+	fnValuePtr, paramsValuesPtr, err := goreflect.CheckFunction(
+		createValidateFn,
+		body,
+		mapper,
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	// Check if the parameters values are not nil
+	if paramsValuesPtr == nil {
+		panic(ErrNilParametersValues)
+	}
+	paramsValues := *paramsValuesPtr
+
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(
 			func(w http.ResponseWriter, r *http.Request) {
 				// Get a new instance of the body
 				dest := goreflect.NewInstanceFromType(bodyType)
 
-				// Get the validate function
-				results, err := goreflect.CallFunction(
-					createValidateFn,
-					dest,
-					mapper,
+				// Call the validate function
+				results, err := goreflect.UnsafeCallFunction(
+					fnValuePtr,
+					paramsValues...,
 				)
 				if err != nil {
 					panic(err)