WIP V3: smarten up section timings

app/helpers.py

@@ -252,7 +252,12 @@ def send_mail(to_addr, from_addr, subj, body):
         s.quit()
 
 
-def ms_to_mmss(ms: Optional[int], decimals: int = 0, negative: bool = False) -> str:
+def ms_to_mmss(
+    ms: Optional[int],
+    decimals: int = 0,
+    negative: bool = False,
+    none: Optional[str] = None,
+) -> str:
     """Convert milliseconds to mm:ss"""
 
     minutes: int
@@ -260,7 +265,10 @@ def ms_to_mmss(ms: Optional[int], decimals: int = 0, negative: bool = False) ->
     seconds: float
 
     if not ms:
-        return "-"
+        if none:
+            return none
+        else:
+            return "-"
     sign = ""
     if ms < 0:
         if negative:

app/playlistmodel.py

@@ -485,24 +485,28 @@ class PlaylistModel(QAbstractTableModel):
                         duration += row_prd.duration
             return (
                 f"{prd.note[:-1].strip()} "
-                f"[{count} tracks, {ms_to_mmss(duration)} unplayed (to end of playlist)]"
+                f"[{count} tracks, {ms_to_mmss(duration, none='none')} "
+                "unplayed (to end of playlist)]"
             )
         elif prd.note.endswith("="):
             # Show subtotal
             for row_number in range(prd.plr_rownum - 1, -1, -1):
                 row_prd = self.playlist_rows[row_number]
                 if self.is_header_row(row_number):
+                    if row_prd.note.endswith("-"):
+                        # There was no start of section
+                        return prd.note
                     if row_prd.note.endswith(("+", "=")):
                         stripped_note = prd.note[:-1].strip()
                         if stripped_note:
                             return (
-                                f"{stripped_note} [{count} tracks, "
+                                f"{stripped_note} [{count} track{'s' if count > 1 else ''}, "
                                 f"{ms_to_mmss(duration)} unplayed]"
                             )
                         else:
                             return (
-                                f"[Subtotal: {count} tracks, "
+                                f"[Subtotal: {count} track{'s' if count > 1 else ''}, "
-                                f"{ms_to_mmss(duration)} unplayed]"
+                                f"{ms_to_mmss(duration, none='none')} unplayed]"
                             )
                     else:
                         continue