WIP V3: sort by each element implemented

app/playlistmodel.py

@@ -1,5 +1,6 @@
 from datetime import datetime, timedelta
 from enum import auto, Enum
+from operator import attrgetter
 from typing import List, Optional
 
 from PyQt6.QtCore import (
@@ -897,35 +898,44 @@ class PlaylistModel(QAbstractTableModel):
         Sort selected rows by artist
         """
 
-        pass
+        self.sort_by_attribute(row_numbers, 'artist')
 
-    def sort_by_duration(self, row_numbers: List[int]) -> None:
+    def sort_by_attribute(self, row_numbers: List[int], attr_name: str) -> None:
         """
-        Sort selected rows by duration
-        """
-
-        pass
-
-    def sort_by_lastplayed(self, row_numbers: List[int]) -> None:
-        """
-        Sort selected rows by lastplayed
-        """
-
-        pass
-
-    def sort_by_title(self, row_numbers: List[int]) -> None:
-        """
-        Sort selected rows by title
+        Sort selected rows by passed attribute name where 'attribute' is a
+        key in PlaylistRowData
         """
 
         # Create a subset of playlist_rows with the rows we are
         # interested in
         shortlist_rows = {k: self.playlist_rows[k] for k in row_numbers}
         sorted_list = [
-            k for k, v in sorted(shortlist_rows.items(), key=lambda item: item[1].title)
+            plr.plr_rownum for plr in
+            sorted(shortlist_rows.values(), key=attrgetter(attr_name))
         ]
         self.move_rows(sorted_list, min(sorted_list))
 
+    def sort_by_duration(self, row_numbers: List[int]) -> None:
+        """
+        Sort selected rows by duration
+        """
+
+        self.sort_by_attribute(row_numbers, 'duration')
+
+    def sort_by_lastplayed(self, row_numbers: List[int]) -> None:
+        """
+        Sort selected rows by lastplayed
+        """
+
+        self.sort_by_attribute(row_numbers, 'lastplayed')
+
+    def sort_by_title(self, row_numbers: List[int]) -> None:
+        """
+        Sort selected rows by title
+        """
+
+        self.sort_by_attribute(row_numbers, 'title')
+
     def supportedDropActions(self) -> Qt.DropAction:
         return Qt.DropAction.MoveAction | Qt.DropAction.CopyAction