added validation; DB is global now

internal/utils/validators.go

@@ -1,9 +1,62 @@
 package utils
 
-import "regexp"
+// import "regexp"
 
-func IsEmailValid(email string) bool {
-	regex := `^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,}$`
-	re := regexp.MustCompile(regex)
-	return re.MatchString(email)
+import (
+	// "reflect"
+	"time"
+
+	"GoMembership/internal/database"
+	"GoMembership/internal/models"
+	"GoMembership/pkg/logger"
+	"github.com/go-playground/validator/v10"
+	"github.com/jbub/banking/iban"
+	"github.com/jbub/banking/swift"
+	"slices"
+)
+
+//
+// func IsEmailValid(email string) bool {
+// 	regex := `^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,}$`
+// 	re := regexp.MustCompile(regex)
+// 	return re.MatchString(email)
+// }
+
+func AgeValidator(fl validator.FieldLevel) bool {
+	fieldValue := fl.Field()
+	// Ensure the field is of type time.Time
+	// if fieldValue.Kind() != reflect.Struct || !fieldValue.Type().ConvertibleTo(reflect.TypeOf(time.Time{})) {
+	// 	return false
+	// }
+	dateOfBirth := fieldValue.Interface().(time.Time)
+	now := time.Now()
+	age := now.Year() - dateOfBirth.Year()
+
+	if now.YearDay() < dateOfBirth.YearDay() {
+		age-- // if birthday is in the future..
+	}
+
+	return age >= 18
+}
+
+func SubscriptionModelValidator(fl validator.FieldLevel) bool {
+	fieldValue := fl.Field().String()
+	var names []string
+	if err := database.DB.Model(&models.SubscriptionModel{}).Pluck("name", &names).Error; err != nil {
+		logger.Error.Fatalf("Couldn't get SubscriptionModel names: %#v", err)
+		return false
+	}
+	return slices.Contains(names, fieldValue)
+}
+
+func IBANValidator(fl validator.FieldLevel) bool {
+	fieldValue := fl.Field().String()
+
+	return iban.Validate(fieldValue) == nil
+}
+
+func BICValidator(fl validator.FieldLevel) bool {
+	fieldValue := fl.Field().String()
+
+	return swift.Validate(fieldValue) == nil
 }