Do more to avoid and recover from partial db updates

 - do not power off in an update is in progress
 - explicitly store last update time, rather than deriving it from
   unchanged tracks.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/system_fsm/system_fsm.cpp b/src/system_fsm/system_fsm.cpp
index df750e80..977f4a6d 100644
--- a/src/system_fsm/system_fsm.cpp
+++ b/src/system_fsm/system_fsm.cpp
@@ -95,7 +95,8 @@ void SystemState::react(const internal::SamdInterrupt&) {
 }
 
 auto SystemState::IdleCondition() -> bool {
-  return sServices->gpios().IsLocked() &&
+  auto db = sServices->database().lock();
+  return sServices->gpios().IsLocked() && !(db && db->isUpdating()) &&
          audio::AudioState::is_in_state<audio::states::Standby>();
 }