roster: extract to a separate module

pqcli/__main__.py

@@ -1,25 +1,20 @@
-import pickle
 from pathlib import Path
 
 import xdg
 
-from pqcli.mechanic import Roster
+from pqcli.roster import Roster
 from pqcli.ui import Ui
 
 SAVE_PATH = Path(xdg.XDG_CONFIG_HOME) / "pqcli" / "save.dat"
 
 
 def main() -> None:
-    if SAVE_PATH.exists():
-        roster = pickle.loads(SAVE_PATH.read_bytes())
-    else:
-        roster = Roster()
+    roster = Roster.load(SAVE_PATH)
 
     try:
         Ui(roster).run()
     finally:
-        SAVE_PATH.parent.mkdir(parents=True, exist_ok=True)
-        SAVE_PATH.write_bytes(pickle.dumps(roster))
+        roster.save(SAVE_PATH)
 
 
 if __name__ == "__main__":

pqcli/mechanic.py

@@ -757,14 +757,6 @@ def monster_task(
     return KillTask(f"Executing {result}", duration, monster=monster)
 
 
-class Roster:
-    def __init__(self) -> None:
-        self.players: T.List[Player] = []
-
-    def add_player(self, player: Player) -> None:
-        self.players.append(player)
-
-
 class StatsBuilder:
     def __init__(self) -> None:
         self.history: T.List[Stats] = []

pqcli/roster.py

@@ -0,0 +1,23 @@
+import pickle
+import typing as T
+from pathlib import Path
+
+from pqcli.mechanic import Player
+
+
+class Roster:
+    def __init__(self) -> None:
+        self.players: T.List[Player] = []
+
+    def add_player(self, player: Player) -> None:
+        self.players.append(player)
+
+    @staticmethod
+    def load(path: Path) -> "Roster":
+        if path.exists():
+            return pickle.loads(path.read_bytes())
+        return Roster()
+
+    def save(self, path: Path) -> None:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_bytes(pickle.dumps(self))

pqcli/ui/__init__.py

@@ -2,7 +2,7 @@ import typing as T
 
 import urwid
 
-from pqcli.mechanic import Roster
+from pqcli.roster import Roster
 from pqcli.ui.exit_view import ExitView
 from pqcli.ui.new_game_view import NewGameView
 from pqcli.ui.roster_view import RosterView

pqcli/ui/roster_view.py

@@ -2,7 +2,7 @@ import typing as T
 
 import urwid
 
-from pqcli.mechanic import Roster
+from pqcli.roster import Roster
 from pqcli.ui.button import MenuButton