--- deliantra/server/ext/player-env.ext	2007/07/11 15:57:30	1.1
+++ deliantra/server/ext/player-env.ext	2007/09/19 21:56:30	1.15
@@ -3,11 +3,93 @@
 # this extension provides "environmental effects",
 # meaning mostly background music and region messages right now.
 
+sub parse_facelist($$) {
+   my ($prefix, $list) = @_;
+
+   return undef
+      unless defined $list;
+
+   #TODO, sort by size (smallest first...)
+   [
+      sort { (cf::face::get_data_size $a) <=> (cf::face::get_data_size $b) }
+      grep $_,
+      map +(cf::face::find "$prefix$_" or ((warn "unable to find music file $_"), undef)),
+      split /\s*,\s*/, $list
+   ]
+}
+
+our %MUSIC_QUEUE;
+our %MUSIC_FACE_CACHE; # cleared by reload_facedata
+
+our $MUSIC_SCHEDULER = cf::async_ext {
+   $Coro::current->{desc} = "music scheduler";
+
+   while () {
+      for (keys %MUSIC_QUEUE) {
+         delete $MUSIC_QUEUE{$_};
+
+         cf::get_slot 0.01, -10, "music scheduler";
+
+         my $pl = cf::player::find_active $_ or next;
+         $pl->ob->active or next;
+         my $ns = $pl->ns or next;
+         $ns->extcmd or next;
+         my $map = $pl->ob->map or next;
+
+         my $faces = $MUSIC_FACE_CACHE{$map} ||= do {
+            # 1. map-specific music info
+            parse_facelist "music/", $map->{music}
+               or do {
+                  # 2. fall back to region if no map-specific music
+                  my $rgn = $pl->ob->region
+                     or next;
+
+                  my $par = $rgn;
+                  while () {
+                     last if exists $par->{music};
+                     $par = $par->parent
+                        or last;
+                  }
+
+                  parse_facelist "music/", $par->{music}
+               }
+            ;
+         };
+
+         $faces
+            or next;
+
+         my $facestr = join ",", @$faces;
+         $ns->{current_music_faces} ne $facestr
+            or next;
+
+         $ns->{current_music_faces} = $facestr;
+
+         my $pri = 0;
+         $ns->send_face ($_, --$pri - 110)
+            for @$faces;
+         $ns->flush_fx;
+
+         $ns->ext_msg (ambient_music => $faces);
+      }
+      Coro::schedule unless %MUSIC_QUEUE;
+   }
+};
+
 cf::player->attach (
    on_region_change => sub {
       my ($pl, $new, $old) = @_;
 
       $pl->ob->message ("You are now " . $new->longname . ". H<Use whereami for more details.>", $new->longname);
+
+      $MUSIC_QUEUE{$pl->ob->name} = undef;
+      $MUSIC_SCHEDULER->ready;
+   },
+   on_map_change => sub {
+      my ($pl, $new) = @_;
+
+      $MUSIC_QUEUE{$pl->ob->name} = undef;
+      $MUSIC_SCHEDULER->ready;
    },
 );