Updates. Got statistics calculated and stored.

Signed-off-by: Cliff Hill <xlorep@darkhelm.org>

backend/src/playlist/sql.py

@@ -238,3 +238,58 @@ async def update_average_track_length(new_average: float) -> None:
         except Exception as e:
             print(f"Failed to update the average track length: {e}")
             await session.rollback()
+
+
+async def update_statistics(
+    new_average_duration: float,
+    new_podcast_length: float,
+    new_max_playtime: float,
+    new_active_holidays: int,
+    new_max_tracks: int,
+    new_max_regular: int,
+    new_max_holiday: int,
+) -> None:
+    """Update the statistics model.
+
+    Args:
+        new_average_duration (float): The new average duration of a track by geometric mean
+            of all track durations as a float.
+        new_podcast_length (float): The new total podcast length of all current episodes as a float.
+        new_max_playtime (float): The new max playtime as a float.
+        new_active_holidays (int): The new active holidays as an int.
+        new_max_tracks (int): The new max tracks per day as an int.
+        new_max_regular (int): The new max regular tracks as an int.
+        new_max_holiday (int): The new max holiday tracks as an int.
+    """
+    async with async_session_maker() as session:
+        try:
+            async with session.begin():
+                # Assuming there's only one statistics record, or you might need to handle this differently
+                stats = await session.get(
+                    models.Statistics, 1
+                )  # Adjust based on how you access the statistics record
+                if stats:
+                    stats.average_track_length = new_average_duration
+                    stats.total_podcast_length = new_podcast_length
+                    stats.max_playtime = new_max_playtime
+                    stats.active_holiday_count = new_active_holidays
+                    stats.max_tracks_per_day = new_max_tracks
+                    stats.max_regular_tracks = new_max_regular
+                    stats.max_holiday_tracks = new_max_holiday
+                    await session.commit()
+                else:
+                    # If no statistics entry exists, create one
+                    new_stats = models.Statistics(
+                        average_track_length=new_average_duration,
+                        total_podcast_length=new_podcast_length,
+                        max_playtime=new_max_playtime,
+                        active_holiday_count=new_active_holidays,
+                        max_tracks_per_day=new_max_tracks,
+                        max_regular_tracks=new_max_regular,
+                        max_holiday_tracks=new_max_holiday,
+                    )
+                    session.add(new_stats)
+                    await session.commit()
+        except Exception as e:
+            print(f"Failed to update the statistics model: {e}")
+            await session.rollback()