Merge pull request #1 from devalexandre/feature/add-milt-args

Feature/add milt args

Author: devalexandre

go.mod

@@ -1,3 +1,5 @@
 module github.com/devalexandre/pipe
 
 go 1.20
+
+require github.com/devalexandre/gofn v1.0.1 // indirect

go.sum

@@ -0,0 +1,2 @@
+github.com/devalexandre/gofn v1.0.1 h1:+pM0fEU5E4ebYt7ReR3FgQMjyESsHNvROJWU1kLa6lg=
+github.com/devalexandre/gofn v1.0.1/go.mod h1:fQLcy6EQZaySBvbJAoxcyjKCHHby01Cm24+IHbJU+qY=

v1/pipe.go

@@ -2,71 +2,55 @@ package v1
 
 import (
 	"errors"
-	"fmt"
 	"reflect"
-	"runtime"
 )
 
-type Pipeline func(args ...interface{}) (interface{}, error)
+// Pipeline type.
+type Pipeline func(...interface{}) (interface{}, error)
 
+// Pipe creates a pipeline from a series of functions.
 func Pipe(fs ...interface{}) Pipeline {
-	return func(args ...interface{}) (interface{}, error) {
-		var result interface{}
-		var err error
-
-		inputs := make([]reflect.Value, len(args))
-		for i, arg := range args {
-			inputs[i] = reflect.ValueOf(arg)
-		}
-
-		for i, f := range fs {
-			funcValue := reflect.ValueOf(f)
-			funcType := funcValue.Type()
-
-			if len(inputs) != funcType.NumIn() {
-				funcName := runtime.FuncForPC(funcValue.Pointer()).Name()
-				return nil, fmt.Errorf("número incorreto de argumentos para a função: %s", funcName)
-			}
-
-			outputs := funcValue.Call(inputs)
-
-			if len(outputs) > 0 {
-				lastOutput := outputs[len(outputs)-1]
-				if lastOutput.Type().Implements(reflect.TypeOf((*error)(nil)).Elem()) && !lastOutput.IsNil() {
-					return nil, lastOutput.Interface().(error)
-				}
-				if i == len(fs)-1 && len(outputs) > 0 {
-					result = outputs[0].Interface()
+	return func(initialArgs ...interface{}) (interface{}, error) {
+		var currentArgs []interface{} = initialArgs
+		for _, f := range fs {
+			fnVal := reflect.ValueOf(f)
+			fnType := fnVal.Type()
+			numIn := fnType.NumIn()
+
+			// Prepare the input arguments for the current function.
+			in := make([]reflect.Value, numIn)
+			for i := 0; i < numIn; i++ {
+				if i < len(currentArgs) {
+					in[i] = reflect.ValueOf(currentArgs[i])
+				} else if i < len(initialArgs) { // Allow passing manual arguments if not enough currentArgs.
+					in[i] = reflect.ValueOf(initialArgs[i])
+				} else {
+					// If there are not enough arguments to pass to the function, return an error.
+					return nil, errors.New("not enough arguments to pass to function")
 				}
 			}
 
-			if len(outputs) > 1 {
-				inputs = outputs[:len(outputs)-1]
-			} else {
-				inputs = []reflect.Value{}
+			// Call the current function in the pipeline.
+			results := fnVal.Call(in)
+
+			// Assume the last function call results will be used as next input.
+			currentArgs = []interface{}{} // Reset currentArgs for next function.
+			for _, result := range results {
+				if result.Type().Implements(reflect.TypeOf((*error)(nil)).Elem()) {
+					if !result.IsNil() { // If the result is an error, return it.
+						return nil, result.Interface().(error)
+					}
+					// If it's a nil error, ignore it for the output.
+				} else {
+					currentArgs = append(currentArgs, result.Interface())
+				}
 			}
 		}
 
-		return result, err
-	}
-}
-
-func ParseTo(result interface{}, target interface{}) error {
-
-	if reflect.TypeOf(target).Kind() != reflect.Ptr {
-		return errors.New("target deve ser um ponteiro")
-	}
-
-	resultValue := reflect.ValueOf(result)
-	targetValue := reflect.ValueOf(target).Elem()
-
-	if !resultValue.Type().ConvertibleTo(targetValue.Type()) {
-		return fmt.Errorf("não é possível converter o resultado do tipo %s para o tipo %s",
-			resultValue.Type(), targetValue.Type())
+		// Return the final result which should match the last function's output type.
+		if len(currentArgs) == 1 {
+			return currentArgs[0], nil // Return single value if only one result.
+		}
+		return currentArgs, nil // Return as slice if multiple values.
 	}
-
-	convertedValue := resultValue.Convert(targetValue.Type())
-	targetValue.Set(convertedValue)
-
-	return nil
 }

v1/pite_test.go

@@ -2,21 +2,84 @@ package v1
 
 import (
 	"fmt"
+	"github.com/devalexandre/gofn/pipe"
+	"reflect"
 	"strings"
 	"testing"
 )
 
+// Exemplos de funções adaptadas para usar com generics
 func ToUpper(s string) (string, error) {
 	return strings.ToUpper(s), nil
 }
 
-// Wrapper para strings.TrimSpace que se encaixa na assinatura esperada por Pipe.
 func Trim(s string) (string, error) {
 	return strings.TrimSpace(s), nil
 }
 
-func TestPipe(t *testing.T) {
+func ValidateCPF(cpf string) (string, error) {
+	if len(cpf) != 11 {
+		return "", fmt.Errorf("CPF must have 11 digits")
+	}
+	return cpf, nil
+}
+
+func FormatCPF(cpf string) (string, error) {
+	return fmt.Sprintf("%s.%s.%s-%s", cpf[0:3], cpf[3:6], cpf[6:9], cpf[9:11]), nil
+}
+
+func Sum(a, b int) (int, error) {
+	return a + b, nil
+}
+
+func Multiply(a int) (int, error) {
+	return a * 2, nil
+}
 
+func ShowResult(result int) (int, error) {
+	fmt.Println(result)
+	return result, nil
+}
+
+// Estrutura Person e funções de validação ajustadas
+type Person struct {
+	Name  string
+	Email string
+	Phone string
+}
+
+func ValidatePersonName(p Person) (Person, error) {
+	if p.Name == "" {
+		return p, fmt.Errorf("Name is required")
+	}
+	return p, nil
+}
+
+func ValidatePersonEmail(p Person) (Person, error) {
+	if p.Email == "" || !strings.Contains(p.Email, "@") {
+		return p, fmt.Errorf("Valid email is required")
+	}
+	return p, nil
+}
+
+func ValidatePersonPhone(p Person) (Person, error) {
+	if p.Phone == "" {
+		return p, fmt.Errorf("Phone is required")
+	}
+	return p, nil
+}
+
+func SumMore(a, b, c int) (int, error) {
+	return a + b + c, nil
+}
+
+func GenerateTreeNumbers(n int) (int, int, int) {
+	return n, n * 2, n * 3
+}
+
+// Testes ajustados para usar a função Pipe com generics
+
+func TestStringPipeline(t *testing.T) {
 	pipeline := Pipe(
 		ToUpper,
 		Trim,
@@ -34,63 +97,110 @@ func TestPipe(t *testing.T) {
 	}
 }
 
-func TestParseTo(t *testing.T) {
-
-	result := "test result"
-	var target string
+func TestCPFPipeline(t *testing.T) {
+	pipeline := Pipe(
+		ValidateCPF,
+		FormatCPF,
+	)
 
-	err := ParseTo(result, &target)
+	input := "12345678901"
+	expected := "123.456.789-01"
+	result, err := pipeline(input)
 	if err != nil {
-		t.Errorf("ParseTo returned an error: %v", err)
+		t.Errorf("Pipeline returned an error: %v", err)
+	}
+
+	if result != expected {
+		t.Errorf("Expected %s, got %s", expected, result)
 	}
+}
+
+func TestMathPipeline(t *testing.T) {
+	pipeline := Pipe(
+		Sum,
+		Multiply,
+		ShowResult,
+	)
 
-	if target != result {
-		t.Errorf("Expected target to be %s, got %s", result, target)
+	expected := 18
+	result, err := pipeline(5, 4)
+	if err != nil {
+		t.Errorf("Pipeline returned an error: %v", err)
 	}
 
-	var intTarget int
-	err = ParseTo(result, &intTarget)
-	if err == nil {
-		t.Errorf("Expected ParseTo to fail when types are incompatible")
+	if result != expected {
+		t.Errorf("Expected %d, got %d", expected, result)
 	}
 }
 
-// Sum recebe dois números e retorna a sua soma.
-func Sum(a, b int) (int, error) {
-	return a + b, nil
-}
+func TestPersonPipeline(t *testing.T) {
+	pipeline := Pipe(
+		ValidatePersonName,
+		ValidatePersonEmail,
+		ValidatePersonPhone,
+	)
+
+	input := Person{
+		Name:  "John Doe",
+		Email: "john.doe@example.com",
+		Phone: "1234567890",
+	}
+	expected := input // assumindo que a entrada é válida e esperada como saída
 
-// IntToString recebe um número e retorna sua representação em string.
-func IntToString(n int) (string, error) {
-	return fmt.Sprintf("%d", n), nil
+	result, err := pipeline(input)
+	if err != nil {
+		t.Errorf("Pipeline returned an error: %v", err)
+	}
+
+	if result != expected {
+		t.Errorf("Expected %+v, got %+v", expected, result)
+	}
 }
 
-func TestSumPipeline(t *testing.T) {
-	// Cria o pipeline.
+func TestMoreArgs(t *testing.T) {
 	pipeline := Pipe(
-		Sum,
-		IntToString,
+		GenerateTreeNumbers,
+		SumMore,
 	)
 
-	// Define a entrada e a saída esperada.
-	input1 := 5
-	input2 := 7
-	expected := "12"
+	expected := 6
+	result, err := pipeline(1)
+	if err != nil {
+		t.Errorf("Pipeline returned an error: %v", err)
+	}
+
+	if result != expected {
+		t.Errorf("Expected %d, got %d", expected, result)
+	}
+}
+
+func TestPipeGoFn(t *testing.T) {
+	data := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	expected := []int{4, 8, 12, 16, 20}
+	// Definindo o pipeline
+	process := Pipe(
+		pipe.Filter(func(i int) bool { return i%2 == 0 }),
+		pipe.Map(func(i int) int { return i * 2 }),
+	)
 
-	// Executa o pipeline com os números de entrada.
-	resultInterface, err := pipeline(input1, input2)
+	// Aplicando o pipeline aos dados
+	resultInterface, err := process(data)
 	if err != nil {
-		t.Fatalf("Pipeline returned an error: %v", err)
+		fmt.Println("Erro ao processar:", err)
+		return
 	}
 
-	// Converte o resultado para string.
-	result, ok := resultInterface.(string)
+	result, ok := resultInterface.([]int)
 	if !ok {
-		t.Fatalf("Failed to convert result to string")
+		t.Errorf("Expected result type []int, got %T", resultInterface)
 	}
 
-	// Verifica se o resultado é o esperado.
-	if result != expected {
-		t.Errorf("Expected %s, got %s", expected, result)
+	if len(result) != len(expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+
+	if !reflect.DeepEqual(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
 	}
+
 }