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session_manager.go
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/
session_manager.go
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// SPDX-FileCopyrightText: 2023 M. Shulhan <[email protected]>
// SPDX-License-Identifier: GPL-3.0-or-later
package karajo
import "git.sr.ht/~shulhan/pakakeh.go/lib/ascii"
// sessionManager manage the active session that map to authenticated user.
type sessionManager struct {
value map[string]*User
}
// newSessionManager create new session manager.
func newSessionManager() (sm *sessionManager) {
sm = &sessionManager{
value: make(map[string]*User),
}
return sm
}
// new create new session for user u.
func (sm *sessionManager) new(u *User) (key string) {
var (
sessb []byte
n int
ok bool
)
for n < 5 {
sessb = ascii.Random([]byte(ascii.LettersNumber), 32)
key = string(sessb)
_, ok = sm.value[key]
if !ok {
sm.value[key] = u
return key
}
n++
}
// Failed to generate unique session, return empty key.
return ``
}
// get the user related to session key.
// It will return nil if user is not exist.
func (sm *sessionManager) get(key string) (u *User) {
u = sm.value[key]
return u
}
// delete the session from storage.
func (sm *sessionManager) delete(key string) {
delete(sm.value, key)
}