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package storage
import (
"encoding/json"
"errors"
"github.com/google/uuid"
"time"
)
type Link struct {
Id uuid.UUID
Target string
OpensFrom time.Time
OpensLeft int
}
var Null = uuid.UUID{}
func (l Link) Save(storage Storage[Link, uuid.UUID]) (uuid.UUID, error) {
return storage.Save(l)
}
func (l Link) Serialize() ([]byte, error) {
return json.Marshal(l)
}
func (l Link) Use() error {
if e := l.Valid(); e != nil {
return e
}
remaining := l.OpensLeft - 1
if remaining < 1 {
_ = Current.Delete(l)
return nil
}
n := Link{
Id: l.Id,
Target: l.Target,
OpensFrom: l.OpensFrom,
OpensLeft: remaining,
}
return n.Update(Current)
}
func (l Link) Update(storage Storage[Link, uuid.UUID]) error {
return storage.Update(l)
}
var NoOpensError = errors.New("no opens left")
var NotYetOpenError = errors.New("not yet open")
func (l Link) Valid() error {
if l.OpensLeft < 1 {
return NoOpensError
}
if time.Now().Before(l.OpensFrom) {
return NotYetOpenError
}
return nil
}
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