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session.go
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session.go
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package session
import (
"context"
"fmt"
"github.com/cantara/cantara-annual-christmasbeer/crypto"
"github.com/cantara/gober/eventmap"
"github.com/cantara/gober/store/inmemory"
"github.com/gofrs/uuid"
"time"
log "github.com/cantara/bragi"
)
const (
ExpiresInSeconds = 7200
)
type sessionService struct {
sessions eventmap.EventMap[AccessTokenSession, sessionEventMetadata]
}
var cryptKey = "2Q82oDggY6CwBs6QHFu3brYjt8JqFILnn68FDN/eTcU="
type sessionEventMetadata struct {
Expires time.Time `json:"expires"`
}
func Init(ctx context.Context) (s sessionService, err error) {
store, err := inmemory.Init()
if err != nil {
return
}
edSession, err := eventmap.Init[AccessTokenSession, sessionEventMetadata](store, "session", "1.0.0", "authentication_session", func(key string) string {
return cryptKey
}, ctx)
if err != nil {
return
}
s = sessionService{
sessions: edSession,
}
go func() {
tickChan := time.Tick(15 * time.Second)
for {
for range tickChan {
now := time.Now()
for _, key := range s.sessions.Keys() {
session, _, err := s.sessions.Get(key)
if err != nil {
log.Println(err)
continue
}
if session.AccessToken.Expires.After(now) {
continue
}
s.sessions.Delete(key)
}
}
}
}()
return
}
func create() (accessToken AccessToken, err error) {
token, err := crypto.GenToken()
if err != nil {
return
}
accessToken = AccessToken{
Token: token,
ExpiresIn: ExpiresInSeconds,
Expires: time.Now().Add(ExpiresInSeconds * time.Second),
}
return
}
func (s sessionService) Create(accountId uuid.UUID) (accessToken AccessToken, err error) {
accessToken, err = create()
if err != nil {
return
}
ats := AccessTokenSession{
AccountId: accountId,
AccessToken: accessToken,
}
sem := sessionEventMetadata{
Expires: accessToken.Expires,
}
err = s.sessions.Set(accessToken.Token, ats, sem)
return
}
func (s sessionService) Renew(token string) (accessToken AccessToken, err error) {
/*
This should just extend the time of the token instead of actually creating a new token.
*/
session, _, err := s.sessions.Get(token)
if err != nil {
if err == eventmap.ERROR_KEY_NOT_FOUND {
err = fmt.Errorf("sessions does not exist")
}
return
}
log.Println("SESSION: ", session)
if session.AccessToken.Expires.Before(time.Now()) {
err = fmt.Errorf("sessions has expired")
return
}
accessToken, err = create()
if err != nil {
return
}
defer s.sessions.Delete(token)
accessToken.Token = token
ats := AccessTokenSession{
AccountId: session.AccountId,
AccessToken: accessToken,
}
sem := sessionEventMetadata{
Expires: accessToken.Expires,
}
err = s.sessions.Set(accessToken.Token, ats, sem)
return
}
func (s sessionService) Validate(token string) (accessToken AccessToken, accountId uuid.UUID, err error) {
session, _, err := s.sessions.Get(token)
if err != nil {
if err == eventmap.ERROR_KEY_NOT_FOUND {
err = fmt.Errorf("sessions does not exist")
}
return
}
accessToken = session.AccessToken
accountId = session.AccountId
return
}