Persist clock information for more stable restarts.

diff --git a/remoteglot.pl b/remoteglot.pl
index 7b3d9670771b14d6d3e4608ea237cd94b02c10c3..9cc82e318fd3b79d617c2128ac3418647a8ce35c 100755 (executable)
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -20,6 +20,7 @@ use IPC::Open2;
 use Time::HiRes;
 use JSON::XS;
 use URI::Escape;
+use Tie::Persistent;
 require 'Position.pm';
 require 'Engine.pm';
 require 'config.pm';
@@ -37,8 +38,9 @@ my %tb_cache = ();
 my $tb_lookup_running = 0;
 my $last_written_json = undef;
 
-# TODO: Persist (parts of) this so that we can restart.
-my %clock_target_for_pos = ();
+# Persisted so that we can restart.
+tie my %clock_info_for_pos, 'Tie::Persistent', 'clock_info.db', 'rw';
+(tied %clock_info_for_pos)->autosync(1);       # turn on write back on every modify
 
 $| = 1;
 
@@ -1058,11 +1060,13 @@ sub find_clock_start {
        }
 
        my $id = id_for_pos($pos);
-       if (exists($clock_target_for_pos{$id})) {
+       if (exists($clock_info_for_pos{$id})) {
+               $pos->{'white_clock'} //= $clock_info_for_pos{$id}{'white_clock'};
+               $pos->{'black_clock'} //= $clock_info_for_pos{$id}{'black_clock'};
                if ($pos->{'toplay'} eq 'W') {
-                       $pos->{'white_clock_target'} = $clock_target_for_pos{$id};
+                       $pos->{'white_clock_target'} = $clock_info_for_pos{$id}->{'white_clock_target'};
                } else {
-                       $pos->{'black_clock_target'} = $clock_target_for_pos{$id};
+                       $pos->{'black_clock_target'} = $clock_info_for_pos{$id}->{'black_clock_target'};
                }
                return;
        }
@@ -1092,14 +1096,16 @@ sub find_clock_start {
                return;
        }
        my $time_left = $pos->{$key};
-       $clock_target_for_pos{$id} = time + $time_left;
+       my $clock_info = {
+               white_clock => $pos->{'white_clock'},
+               black_clock => $pos->{'black_clock'}
+       };
        if ($pos->{'toplay'} eq 'W') {
-               $pos->{'white_clock_target'} = $clock_target_for_pos{$id};
-               delete $pos->{'black_clock_target'};
+               $clock_info->{'white_clock_target'} = $pos->{'white_clock_target'} = time + $time_left;
        } else {
-               $pos->{'black_clock_target'} = $clock_target_for_pos{$id};
-               delete $pos->{'white_clock_target'};
+               $clock_info->{'black_clock_target'} = $pos->{'black_clock_target'} = time + $time_left;
        }
+       $clock_info_for_pos{$id} = $clock_info;
 }
 
 sub schedule_tb_lookup {