add 'live' log type, and handle it in streamer

aircox/management/commands/streamer.py

@@ -18,6 +18,13 @@ from django.utils import timezone as tz
 from aircox.models import Station, Diffusion, Track, Sound, Log
 
 
+class Tracer:
+    """
+    Keep trace of played item and update logs in adequation to it
+    """
+    pass
+
+
 class Monitor:
     """
     Log and launch diffusions for the given station.
@@ -65,11 +72,12 @@ class Monitor:
         self.sync_playlists()
         self.handle()
 
-    def log(self, **kwargs):
+    def log(self, date = None, **kwargs):
         """
         Create a log using **kwargs, and print info
         """
-        log = Log(station = self.station, **kwargs)
+        log = Log(station = self.station, date = date or tz.now(),
+                  **kwargs)
         log.save()
         log.print()
 
@@ -147,8 +155,8 @@ class Monitor:
         for source in self.station.sources:
             if source == self.station.dealer:
                 continue
-            playlist = [ sound.path for sound in
+            playlist = source.program.sound_set.all() \
-                            source.program.sound_set.all() ]
+                             .values_list('path', flat = True)
             source.playlist = playlist
 
     def trace_canceled(self):
@@ -187,52 +195,78 @@ class Monitor:
         station = self.station
         now = tz.now()
 
-        diff_log = station.played(models = Diffusion) \
+        log = station.played(models = Diffusion).order_by('date').last()
-                          .order_by('date').last()
+        if not log or not log.related.is_date_in_range(now):
-        if not diff_log or \
+            # not running anymore
-                not diff_log.related.is_date_in_range(now):
             return None, []
 
         # sound has switched? assume it has been (forced to) stopped
         sounds = station.played(models = Sound) \
-                        .filter(date__gte = diff_log.date) \
+                        .filter(date__gte = log.date) \
                         .order_by('date')
 
-        if sounds.last() and sounds.last().source != diff_log.source:
+        # last sound source change: end of file reached
-            return diff_log, []
+        if sounds.count() and sounds.last().source != log.source:
+            # diffusion is finished: end of sound file reached
+            return None, []
 
-        # last diff is still playing: get the remaining playlist
+        # last diff is still playing: get remaining playlist
-        sounds = sounds.filter(
+        sounds = sounds \
-            source = diff_log.source, pk__gt = diff_log.pk
+            .filter(source = log.source, pk__gt = diff_log.pk) \
-        )
+            .exclude(related__type = Sound.Type.removed)
-        sounds = [
+            .values_list('related__path', flat = True)
-            sound.related.path for sound in sounds
+        remaining = log.related.get_archives().exclude(path__in = sounds)
-            if sound.related.type != Sound.Type.removed
-        ]
 
-        return (
+        return log.related, remaining
-            diff_log.related,
-            [ path for path in diff_log.related.playlist
-                if path not in sounds ]
-        )
 
     def __next_diff(self, diff):
         """
-        Return the tuple with the next diff that should be played and
+        Return the next diffusion to be played as tuple of (diff, playlist).
-        the playlist
+        If diff is given, it is the one to be played right after it.
-
-        Note: diff is a log
         """
         station = self.station
         now = tz.now()
 
-        args = {'start__gt': diff.date } if diff else {}
+        kwargs = {'start__gte': diff.end } if diff else {}
-        diff = Diffusion.objects.at(station, now).filter(
+        diff = Diffusion.objects \
-            type = Diffusion.Type.normal,
+            .at(station, now) \
-            sound__type = Sound.Type.archive,
+            .filter(type = Diffusion.Type.normal,
-            **args
+                    sound_type = Sound.Type.archive, **kwargs) \
-        ).distinct().order_by('start').first()
+            .distinct().order_by('start').first()
-        return (diff, diff and diff.playlist or [])
+        return diff
+
+    def handle_pl_sync(self, source, playlist, diff = None, date = None):
+        """
+        Update playlist of a source if required, and handle logging when
+        it is needed.
+        """
+        dealer = self.station.dealer
+        if dealer.playlist != playlist:
+            dealer.playlist = playlist
+            if diff and not diff.is_live():
+                self.log(type = Log.Type.load, source = source.id,
+                         related = diff, date = date)
+
+    def handle_diff_start(self, source, diff, date):
+        """
+        Enable dealer in order to play a given diffusion if required,
+        handle start of diffusion
+        """
+        if not diff or not diff.start <= now:
+            return
+
+        # live: just log it
+        if diff.is_live():
+            if not Log.get_for(object = diff).count():
+                self.log(type = Log.Type.live, source = source.id,
+                         related = diff, date = date)
+            return
+
+        # enable dealer
+        if not dealer.active:
+            dealer.active = True
+            self.log(type = Log.Type.play, source = source.id,
+                     related = diff, date = date)
 
     def handle(self):
         """
@@ -246,33 +280,15 @@ class Monitor:
         now = tz.now()
 
         # current and next diffs
-        diff, playlist = self.__current_diff()
+        current_diff, current_pl = self.__current_diff()
-        dealer.active = bool(playlist)
+        next_diff, next_pl = self.__next_diff(diff)
 
-        next_diff, next_playlist = self.__next_diff(diff)
+        # playlist
-        playlist += next_playlist
+        dealer.active = bool(current_pl)
+        playlist = current_pl + next_pl
 
-        # playlist update
+        self.handle_pl_sync(dealer, playlist, next_diff, now)
-        if dealer.playlist != playlist:
+        self.handle_diff_start(dealer, next_diff)
-            dealer.playlist = playlist
-            if next_diff:
-                self.log(
-                    type = Log.Type.load,
-                    source = dealer.id,
-                    date = now,
-                    related = next_diff
-                )
-
-        # dealer.on when next_diff start <= now
-        if next_diff and not dealer.active and \
-                next_diff.start <= now:
-            dealer.active = True
-            self.log(
-                type = Log.Type.play,
-                source = dealer.id,
-                date = now,
-                related = next_diff,
-            )
 
 
 class Command (BaseCommand):

aircox/models.py

@@ -231,11 +231,11 @@ class Station(Nameable):
         self.__prepare()
         return self.__streamer
 
-    def played(self, models, archives = True):
+    def played(self, models, archives = True, include_live = True):
         """
         Call Log.objects.played for this station
         """
-        return Log.objects.played(self, models, archives)
+        return Log.objects.played(self, models, archives, include_live)
 
     @staticmethod
     def __mix_logs_and_diff(diffs, logs, count = 0):
@@ -867,7 +867,7 @@ class Diffusion(models.Model):
         """
         List of archives' path; uses get_archives
         """
-        return [ sound.path for sound in self.get_archives() ]
+        return self.get_archives().values_list('path', flat = True)
 
     def get_archives(self):
         """
@@ -1260,7 +1260,7 @@ class LogManager(RelatedManager):
         qs = self.get_for(station, object, model, qs)
         return self._at(date, qs)
 
-    def played(self, station, models, archives = True):
+    def played(self, station, models, archives = True, include_live = True):
         """
         Return a queryset of the played elements' log for the given
         station and model. This queryset is ordered by date ascending
@@ -1270,6 +1270,10 @@ class LogManager(RelatedManager):
         * archives: if false, exclude log of diffusion's archives from
             the queryset;
         """
+        if include_live:
+            qs = self.get_for(station, model = models) \
+                     .filter(type__in = (Log.Type.play, Log.Type.live))
+        else:
             qs = self.get_for(station, model = models) \
                      .filter(type = Log.Type.play)
 
@@ -1303,7 +1307,11 @@ class Log(Related):
         """
         Source starts to be preload related_object
         """
-        other = 0x03
+        live = 0x03
+        """
+        A diffusion occured, but in live (no sound played by Aircox)
+        """
+        other = 0x04
         """
         Other log
         """