evision-safe playlist timing

2026-09-01 20:12:12 +03:00
parent 532e03ffca
commit 1e21da0aac
4 changed files with 236 additions and 6 deletions
@@ -17,8 +17,9 @@ type PlaylistController struct {
 }

 type PlaylistSnapshot struct {
-	State PlaylistState
-	Entry PlaylistEntry
+	State    PlaylistState
+	Entry    PlaylistEntry
+	Revision uint64
 }

 var (
@@ -51,7 +52,8 @@ func (c *PlaylistController) Run(
 	commands <-chan PlaylistCommand,
 ) error {
 	state := PlaylistState{}
-	c.publish(state)
+	revision := uint64(0)
+	c.publish(state, revision)

 	for {
 		select {
@@ -78,10 +80,11 @@ func (c *PlaylistController) Run(
 					return ctx.Err()
 				case c.sessions <- sessionCommand:
 				}
+				revision++
 			}

 			state = next
-			c.publish(state)
+			c.publish(state, revision)
 		}
 	}
 }
@@ -92,11 +95,15 @@ func (c *PlaylistController) Snapshot() (PlaylistSnapshot, bool) {
 	return c.snapshot, c.hasSnapshot
 }

-func (c *PlaylistController) publish(state PlaylistState) {
+func (c *PlaylistController) publish(state PlaylistState, revision uint64) {
 	entry, _ := state.Entry(c.playlist)

 	c.mu.Lock()
-	c.snapshot = PlaylistSnapshot{State: state, Entry: entry}
+	c.snapshot = PlaylistSnapshot{
+		State:    state,
+		Entry:    entry,
+		Revision: revision,
+	}
 	c.hasSnapshot = true
 	c.mu.Unlock()
 }