Improve logging and FadeCurve generation. Tidy.

app/classes.py

@@ -13,6 +13,7 @@ from sqlalchemy.orm import scoped_session
 
 # App imports
 from config import Config
+from log import log
 from models import PlaylistRows
 import helpers
 
@@ -29,6 +30,7 @@ class FadeCurve:
 
         audio = helpers.get_audio_segment(track_path)
         if not audio:
+            log.error(f"FadeCurve: could not get audio for {track_path=}")
             return None
 
         # Start point of curve is Config.FADE_CURVE_MS_BEFORE_FADE
@@ -116,7 +118,7 @@ class PlaylistTrack:
         self.end_time: Optional[dt.datetime] = None
         self.fade_at: Optional[int] = None
         self.fade_graph: Optional[FadeCurve] = None
-        self.fade_graph_start_updates: Optional[datetime] = None
+        self.fade_graph_start_updates: Optional[dt.datetime] = None
         self.fade_length: Optional[int] = None
         self.path: Optional[str] = None
         self.playlist_id: Optional[int] = None
@@ -163,7 +165,6 @@ class PlaylistTrack:
             self.fade_length = track.silence_at - track.fade_at
 
         # Initialise and add FadeCurve in a thread as it's slow
-        # Import in separate thread
         self.fadecurve_thread = QThread()
         self.worker = AddFadeCurve(
             self,
@@ -197,10 +198,9 @@ class PlaylistTrack:
                 milliseconds=update_graph_at_ms
             )
 
-        # Calculate time fade_graph should start updating
-        if self.fade_at:
+            # Calculate time fade_graph should start updating
             update_graph_at_ms = max(0, self.fade_at - Config.FADE_CURVE_MS_BEFORE_FADE - 1)
-            self.fade_graph_start_updates = now + timedelta(milliseconds=update_graph_at_ms)
+            self.fade_graph_start_updates = now + dt.timedelta(milliseconds=update_graph_at_ms)
 
 
 class AddFadeCurve(QObject):
@@ -229,9 +229,11 @@ class AddFadeCurve(QObject):
         Create fade curve and add to PlaylistTrack object
         """
 
-        self.playlist_track.fade_graph = FadeCurve(
-            self.track_path, self.track_fade_at, self.track_silence_at
-        )
+        fc = FadeCurve(self.track_path, self.track_fade_at, self.track_silence_at)
+        if not fc:
+            log.error(f"Failed to create FadeCurve for {self.track_path=}")
+        else:
+            self.playlist_track.fade_graph = fc
         self.finished.emit()
 
 

app/playlistmodel.py

@@ -1240,9 +1240,19 @@ class PlaylistModel(QAbstractTableModel):
             if plr:
                 # Check this isn't a header row
                 if self.is_header_row(row_number):
+                    log.error(
+                        "Tried to set next row on header row: "
+                        f"playlistmodel.set_next_track({row_number=}, "
+                        f"{self.playlist_id=}"
+                    )
                     return
                 # Check track is readable
                 if file_is_unreadable(plr.track.path):
+                    log.error(
+                        "Tried to set next row on unreadable row: "
+                        f"playlistmodel.set_next_track({row_number=}, "
+                        f"{self.playlist_id=}"
+                    )
                     return
                 track_sequence.next.set_plr(session, plr)
                 self.signals.next_track_changed_signal.emit()