Add Day.prev_date/Day.next_date and use them for navigation in Day page.

[plomtask] / plomtask / days.py

diff --git a/plomtask/days.py b/plomtask/days.py
index 776658e14aa6f7f488eeda7546eb8612c2f50ee0..0936d047aa3eda7c4ce9374c90ca3f9ad3362ad5 100644 (file)
--- a/plomtask/days.py
+++ b/plomtask/days.py
@@ -1,5 +1,5 @@
 """Collecting Day and date-related items."""
-from datetime import datetime
+from datetime import datetime, timedelta
 from sqlite3 import Row
 from plomtask.misc import HandledException
 from plomtask.db import DatabaseConnection
@@ -46,7 +46,7 @@ class Day:
     def all(cls, db_conn: DatabaseConnection,
             date_range: tuple[str, str] = ('', '')):
         """Return list of Days in database within date_range."""
-        def date_from_range_element(date_str: str, default: str):
+        def date_from_range_str(date_str: str, default: str):
             if date_str == '':
                 date_str = default
             elif date_str == 'today':
@@ -54,8 +54,8 @@ class Day:
             elif not date_valid(date_str):
                 raise HandledException(f'Bad date: {date_str}')
             return date_str
-        start_date = date_from_range_element(date_range[0], '2024-01-01')
-        end_date = date_from_range_element(date_range[1], '2030-01-01')
+        start_date = date_from_range_str(date_range[0], '2024-01-01')
+        end_date = date_from_range_str(date_range[1], '2030-01-01')
         days = []
         sql = 'SELECT * FROM days WHERE date >= ? AND date <= ?'
         for row in db_conn.exec(sql, (start_date, end_date)):
@@ -78,6 +78,18 @@ class Day:
         """Return what weekday matches self.date."""
         return self.datetime.strftime('%A')
 
+    @property
+    def prev_date(self):
+        """Return date preceding date of this Day."""
+        prev_datetime = self.datetime - timedelta(days=1)
+        return prev_datetime.strftime(DATE_FORMAT)
+
+    @property
+    def next_date(self):
+        """Return date succeeding date of this Day."""
+        next_datetime = self.datetime + timedelta(days=1)
+        return next_datetime.strftime(DATE_FORMAT)
+
     def save(self, db_conn: DatabaseConnection):
         """Add (or re-write) self to database."""
         db_conn.exec('REPLACE INTO days VALUES (?, ?)',