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session.go
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session.go
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package auth
import (
"crypto/rand"
"encoding/hex"
"encoding/json"
"time"
)
const (
sessionKey = key("session")
userKey = key("user_session")
SessionDuration = time.Hour * 3
SessionLongDuration = time.Hour * 24 * 30
)
type (
key string
Session struct {
ID string `json:"id"`
Counter int `json:"counter"` // the amount of times the session has been saved
User *User `json:"user,omitempty"`
Groups Groups `json:"groups,omitempty"`
Permissions GroupPermissions `json:"permissions,omitempty"`
ExpiresAt time.Time `json:"expires_at"`
UserAgent string `json:"user_agent"`
Message string `json:"message"`
MessageType string `json:"message_type"`
IP string `json:"ip"` // Source IP Address
Meta map[string]any `json:"meta"`
}
)
func NewSession(expiresAt time.Time) Session {
return Session{
Meta: make(map[string]any),
ExpiresAt: expiresAt,
}
}
func (s *Session) UserID() *int64 {
if s.User == nil {
return nil
}
return &s.User.ID
}
func (s *Session) Expired() bool {
return s.ExpiresAt.Before(time.Now())
}
func (s *Session) Get(key string) any {
return s.Meta[key]
}
func (s *Session) Set(key string, data any) {
s.Meta[key] = data
}
func (s *Session) GroupName() string {
if len(s.Groups) == 0 {
return ""
}
return s.Groups[0].Name
}
func (s *Session) ClearFlash() {
s.Message = ""
s.MessageType = ""
}
func (s *Session) HasFlash() bool {
return s.Message != ""
}
func (s *Session) Flash(msgtype, msg string) {
s.Message = msg
s.MessageType = msgtype
}
func (s Session) IsAnonymous() bool {
return s.User == nil
}
func (s Session) IsAuthorized() bool {
return !s.IsAnonymous()
}
func (s Session) MarshalBinary() ([]byte, error) {
return json.Marshal(s)
}
func (s *Session) UnmarshalBinary(data []byte) error {
return json.Unmarshal(data, s)
}
func GenerateToken(bytes int) (string, error) {
buf := make([]byte, bytes)
_, err := rand.Read(buf)
if err != nil {
return "", err
}
return hex.EncodeToString(buf), nil
}