Add hamster tag management, reinstate tags during import, reorganise

code

hamstertools/screens/hamster/categories.py

@@ -0,0 +1,78 @@
+
+from datetime import datetime
+from peewee import JOIN, fn
+from textual.binding import Binding
+from textual.coordinate import Coordinate
+from textual.widgets import DataTable
+from hamstertools.db import HamsterActivity, HamsterCategory, HamsterFact
+from hamstertools.screens.list import ListPane
+
+
+class CategoryList(ListPane):
+    BINDINGS = [
+        ("s", "sort", "Sort"),
+        ("r", "refresh", "Refresh"),
+        ("/", "filter", "Search"),
+        ("d", "delete", "Delete category"),
+        Binding(key="escape", action="cancelfilter", show=False),
+    ]
+
+    def _refresh(self):
+        self.table.clear()
+
+        categories = (
+            HamsterCategory.select(
+                HamsterCategory,
+                fn.Count(HamsterActivity.id).alias("activities_count"),
+                HamsterFact.start_time,
+            )
+            .join(HamsterActivity, JOIN.LEFT_OUTER)
+            .join(HamsterFact, JOIN.LEFT_OUTER)
+            .group_by(HamsterCategory)
+        )
+
+        filter_search = self.query_one("#filter #search").value
+        if filter_search is not None:
+            categories = categories.where(HamsterCategory.name.contains(filter_search))
+
+        filter_date = self.query_one("#filter #date").value
+        if filter_date is not None:
+            try:
+                categories = categories.where(
+                    HamsterFact.start_time > datetime.strptime(filter_date, "%Y-%m-%d")
+                )
+            except ValueError:
+                pass
+
+        self.table.add_rows(
+            [
+                [
+                    category.id,
+                    category.name,
+                    category.activities_count,
+                ]
+                for category in categories
+            ]
+        )
+
+        self.table.sort(self.sort)
+
+    def on_mount(self) -> None:
+        self.table = self.query_one(DataTable)
+        self.table.cursor_type = "row"
+        self.columns = self.table.add_columns("category id", "category", "activities")
+        self.sort = self.columns[1]
+        self._refresh()
+
+    def action_delete(self) -> None:
+        row_key, _ = self.table.coordinate_to_cell_key(self.table.cursor_coordinate)
+
+        category_id = self.table.get_cell_at(
+            Coordinate(self.table.cursor_coordinate.row, 0),
+        )
+        category = HamsterCategory.get(id=category_id)
+        category.delete_instance()
+
+        self.table.remove_row(row_key)
+
+