justcaptcha/internal/captcha/captcha.go

45 lines
689 B
Go

package captcha
import (
"crypto/rand"
"image"
"math/big"
"time"
"github.com/pkg/errors"
)
const (
maxAnswer = 999999
)
var errorNotFound = errors.New("captcha not found")
type ID string
type Answer string
type ICaptcha interface {
generateImage() *image.Image
GetImage() *image.Image
GetAnswer() Answer
Solve(answer Answer) bool
IsSolved() bool
Expiry() time.Time
}
type Captcha struct {
Image image.Image
Answer Answer
Solved bool
ExpireIn time.Time
}
func GenerateAnswer() Answer {
ans, _ := rand.Int(rand.Reader, big.NewInt(maxAnswer))
return (Answer(ans.String()))
}
func ExpiryDate(expiry time.Duration) time.Time {
return time.Now().Add(expiry)
}