add utility function to get currently playing track

nonstop/utils.py

+import datetime
+
+from .models import Track, SomaLogLine
+
+
+def get_current_nonstop_track():
+    try:
+        soma_log_line = SomaLogLine.objects.select_related().order_by('-play_timestamp')[0]
+    except IndexError:
+        # nothing yet
+        return {}
+    if soma_log_line.play_timestamp < (datetime.datetime.now() - datetime.timedelta(hours=1)):
+        # last known line is way too old
+        return {}
+    if not soma_log_line.on_air:
+        # nonstop should be on air but it's not :/
+        return {}
+    d = {}
+    current_nonstop_file = soma_log_line.filepath
+    if not 'Tranches/' in current_nonstop_file.filepath:
+        # nonstop is playing but it's not a nonstop track :/
+        return {}
+    current_track = soma_log_line.filepath.track
+    if current_track is None:
+        # nonstop is playing a nonstop track, but it's unknown :/
+        return {}
+    d = {'track_title': current_track.title}
+    if current_track.artist:
+        d['track_artist'] = current_track.artist.name
+    return d