fix(multiplayer): dispatch live abandonment lifecycle

server/store/live_abandonment_sql.go

@@ -53,9 +53,14 @@ SET revision = revision + 1
 WHERE match_id = $1 AND state = 'LIVE'
 RETURNING revision`
 
+const liveAbandonmentTargetsSQL = `SELECT player_id
+FROM match_participants
+WHERE match_id = $1 AND participation_active
+ORDER BY player_id`
+
 const liveAbandonmentOutboxSQL = `INSERT INTO outbox
     (event_id, aggregate_type, aggregate_id, revision, event_type, payload)
-VALUES ($1, 'match', $2, $3, 'participant_abandoned', $4)`
+VALUES ($1, 'match', $2, $3, 'state_changed', $4)`
 
 // ReconcileLiveAbandonments applies a bounded, durable reconnect-grace sweep.
 // It does not deactivate participants or alter LIVE tickets: an abandonment
@@ -148,7 +153,18 @@ func ApplyLiveAbandonments(ctx context.Context, db *sql.DB, matchID string, now
 		if err := tx.QueryRowContext(ctx, liveAbandonmentRevisionSQL, matchID).Scan(&revision); err != nil {
 			return err
 		}
-		payload, err := json.Marshal(map[string]any{"match_id": matchID, "abandoned_player_ids": abandonmentIDs(planned)})
+		targets, err := loadLiveAbandonmentTargets(ctx, tx, matchID)
+		if err != nil {
+			return err
+		}
+		if len(targets) == 0 {
+			return fmt.Errorf("%w: live match has no active event targets", domain.ErrConflict)
+		}
+		payload, err := json.Marshal(map[string]any{
+			"event": "state_changed", "revision": revision, "resource_id": matchID,
+			"occurred_at": now, "state": domain.Live, "match_id": matchID,
+			"player_ids": targets, "abandoned_player_ids": abandonmentIDs(planned),
+		})
 		if err != nil {
 			return err
 		}
@@ -204,6 +220,23 @@ func loadLiveAbandonmentHistory(ctx context.Context, tx *sql.Tx, participants []
 	return history, nil
 }
 
+func loadLiveAbandonmentTargets(ctx context.Context, tx *sql.Tx, matchID string) ([]string, error) {
+	rows, err := tx.QueryContext(ctx, liveAbandonmentTargetsSQL, matchID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var players []string
+	for rows.Next() {
+		var playerID string
+		if err := rows.Scan(&playerID); err != nil {
+			return nil, err
+		}
+		players = append(players, playerID)
+	}
+	return players, rows.Err()
+}
+
 func abandonmentIDs(abandonments []domain.Abandonment) []string {
 	ids := make([]string, len(abandonments))
 	for i := range abandonments {