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package main
import (
"net/http"
"reflect"
"time"
"github.com/gin-gonic/gin"
"github.com/gin-gonic/gin/binding"
"gopkg.in/go-playground/validator.v8"
)
// Booking contains binded and validated data.
type Booking struct {
CheckIn time.Time `form:"check_in" binding:"required,bookabledate" time_format:"2006-01-02"`
CheckOut time.Time `form:"check_out" binding:"required,gtfield=CheckIn" time_format:"2006-01-02"`
}
func bookableDate(
v *validator.Validate, topStruct reflect.Value, currentStructOrField reflect.Value,
field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string,
) bool {
if date, ok := field.Interface().(time.Time); ok {
today := time.Now()
if today.Year() > date.Year() || (today.Year() == date.Year() && today.YearDay() > date.YearDay()) {
return false
}
}
return true
}
func main() {
route := gin.Default()
if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
v.RegisterValidation("bookabledate", bookableDate)
}
route.GET("/bookable", getBookable)
route.Run(":8085")
}
func getBookable(c *gin.Context) {
var b Booking
if err := c.ShouldBindWith(&b, binding.Query); err == nil {
c.JSON(http.StatusOK, gin.H{"message": "Booking dates are valid!"})
} else {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
}
}
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