chore: add experiments with validation

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"github.com/go-playground/validator/v10"
 	"github.com/xuri/excelize/v2"
 	"reflect"
 	"strconv"
@@ -9,18 +10,45 @@ import (
 
 type User struct {
 	Id        int     `xlsx:"id"`
-	FirstName string  `xlsx:"first_name"`
+	FirstName string  `xlsx:"first_name" validate:"required"`
 	LastName  string  `xlsx:"last_name"`
 	Email     string  `xlsx:"email"`
 	Gender    bool    `xlsx:"gender"`
 	Balance   float32 `xlsx:"balance"`
 }
 
+var validate *validator.Validate
+
 func main() {
+	validate = validator.New()
 
 	data := excelToStruct[User]("Book1.xlsx", "Sheet1")
 
-	fmt.Println(data)
+	ok, errList := someValidation(data)
+	if ok {
+		fmt.Println("Data is valid")
+		fmt.Println(data)
+	} else {
+		fmt.Println("Data is not valid")
+		fmt.Println(errList)
+	}
+}
+
+func someValidation[T any](data []T) (bool, []error) {
+	var errList []error
+
+	for _, v := range data {
+		err := validate.Struct(v)
+		if err != nil {
+			errList = append(errList, err)
+		}
+	}
+
+	if len(errList) > 0 {
+		return false, errList
+	} else {
+		return true, nil
+	}
 }
 
 func excelToStruct[T any](bookPath, sheetName string) (dataExcel []T) {