Refactor and documentation.

dsst/dsst_gtk3/handlers/season_handlers.py

@@ -0,0 +1,27 @@
+from dsst_sql import sql
+from dsst_gtk3 import dialogs, gtk_ui
+
+
+class SeasonHandlers:
+    """Callback handlers related to signals for managing seasonal data"""
+    def __init__(self, app: 'gtk_ui.GtkUi'):
+        self.app = app
+
+    def do_add_season(self, *_):
+        name = dialogs.enter_string_dialog(self.app.ui, 'Name for the new Season')
+        if name:
+            sql.Season.create(game_name=name, number=1)
+            self.app.reload_seasons()
+
+    def do_season_selected(self, *_):
+        self.app.reload_for_season()
+
+    def do_add_episode(self, *_):
+        season_id = self.app.get_selected_season_id()
+        if not season_id:
+            return
+        episode = dialogs.show_episode_dialog(self.app.ui, 'Create new Episode', season_id)
+        self.app.reload_for_season()
+
+    def on_selected_episode_changed(self, *_):
+        self.app.reload_for_episode()