1 files changed, 48 insertions, 0 deletions
diff --git a/back/cmd/authfs/sess.go b/back/cmd/authfs/sess.go
new file mode 100644
index 0000000..138ea84
--- /dev/null
+++ b/back/cmd/authfs/sess.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"sync/atomic"
+	"time"
+
+	"git.samanthony.xyz/buth/back/auth"
+)
+
+type Session struct {
+	auth.SessId
+	auth.Uname
+	timer *time.Timer
+	dead  *atomic.Bool
+}
+
+func NewSession(id auth.SessId, uname auth.Uname) *Session {
+	dead := new(atomic.Bool)
+	timer := time.AfterFunc(auth.SessTimeout, func() { dead.Store(true) })
+	return &Session{
+		id,
+		uname,
+		timer,
+		dead,
+	}
+}
+
+// Close expires the session immediately.
+func (s *Session) Close() {
+	s.timer.Stop()
+	s.dead.Store(true)
+}
+
+// IsActive returns true if the session has not yet expired.
+func (s *Session) IsActive() bool {
+	return !s.dead.Load()
+}
+
+// Extend resets the session's timer or returns false if it has
+// already expired.
+func (s *Session) Extend() bool {
+	if s.timer.Stop() {
+		s.timer.Reset(auth.SessTimeout)
+		return true
+	}
+	// already expired
+	return false
+}