Live game snapshots become version 2 with the clock and each move's time left. On restore the running clock goes on from the start of the turn, so downtime is not charged; version 1 snapshots get a new clock. Saved games keep the initial time (migration 002_clock) and each move's time left.
GameClockScheduler checks every live game once a second and ends those whose running clock has reached zero, whether or not anyone is connected. The clock replaces the offline turn timeout and the inactivity rule, so both are removed with the offline times they used.
Each player starts with GAME_CLOCK_MS (5 minutes). A move deducts the turn's time from the mover; a move that arrives after the time has run out is not played and the opponent wins on time. Every ending stops the clock, and clients get the clock and the server time with each game message.
- Games record start and move times, spectator peak and distinct count
- Games end as completed, left (the leaver loses), timeout (5 minutes
offline on your turn while the opponent is online) or inactive (both
offline for 30 minutes); everyone gets on_game_end
- Connection info carries offlineSince for the countdown
- A new game is rejected while the user has one in progress
- Live games are written to Valkey after every change and restored on
startup; finished games are saved to Postgres with public ids, and
saves that fail are kept and retried every 30 seconds
- Clients get a trimmed game without spectator ids
- Startup waits for Valkey, restores games, then accepts connections;
migrations are retried while Postgres is unreachable
- Spectators are removed from games when they disconnect; the lookup
iterated an iterator with for...in and never found anything
- Finished and left games are removed from memory, not only from the
player mappings
- The connection info is sent once when a game starts
