plomlompom.com Git - plomtask/blob - plomtask/days.py

   1 """Collecting Day and date-related items."""
   2 from datetime import datetime, timedelta
   3 from sqlite3 import Row
   4 from plomtask.misc import HandledException
   5 from plomtask.db import DatabaseConnection
   6
   7 DATE_FORMAT = '%Y-%m-%d'
   8
   9
  10 def date_valid(date: str):
  11     """Validate date against DATE_FORMAT, return Datetime or None."""
  12     try:
  13         result = datetime.strptime(date, DATE_FORMAT)
  14     except (ValueError, TypeError):
  15         return None
  16     return result
  17
  18
  19 def todays_date():
  20     """Return current date in DATE_FORMAT."""
  21     return str(datetime.now())[:10]
  22
  23
  24 class Day:
  25     """Individual days defined by their dates."""
  26
  27     def __init__(self, date: str, comment: str = ''):
  28         self.date = date
  29         self.datetime = date_valid(self.date)
  30         if not self.datetime:
  31             raise HandledException(f'Given date of wrong format: {self.date}')
  32         self.comment = comment
  33
  34     def __eq__(self, other: object):
  35         return isinstance(other, self.__class__) and self.date == other.date
  36
  37     def __lt__(self, other):
  38         return self.date < other.date
  39
  40     @classmethod
  41     def from_table_row(cls, row: Row):
  42         """Make new Day from database row."""
  43         return cls(row[0], row[1])
  44
  45     @classmethod
  46     def all(cls, db_conn: DatabaseConnection,
  47             date_range: tuple[str, str] = ('', '')):
  48         """Return list of Days in database within date_range."""
  49         def date_from_range_str(date_str: str, default: str):
  50             if date_str == '':
  51                 date_str = default
  52             elif date_str == 'today':
  53                 date_str = todays_date()
  54             elif not date_valid(date_str):
  55                 raise HandledException(f'Bad date: {date_str}')
  56             return date_str
  57         start_date = date_from_range_str(date_range[0], '2024-01-01')
  58         end_date = date_from_range_str(date_range[1], '2030-01-01')
  59         days = []
  60         sql = 'SELECT * FROM days WHERE date >= ? AND date <= ?'
  61         for row in db_conn.exec(sql, (start_date, end_date)):
  62             days += [cls.from_table_row(row)]
  63         days.sort()
  64         return days
  65
  66     @classmethod
  67     def by_date(cls, db_conn: DatabaseConnection,
  68                 date: str, create: bool = False):
  69         """Retrieve Day by date if in DB, else return None."""
  70         for row in db_conn.exec('SELECT * FROM days WHERE date = ?', (date,)):
  71             return cls.from_table_row(row)
  72         if create:
  73             return cls(date)
  74         return None
  75
  76     @property
  77     def weekday(self):
  78         """Return what weekday matches self.date."""
  79         return self.datetime.strftime('%A')
  80
  81     @property
  82     def prev_date(self):
  83         """Return date preceding date of this Day."""
  84         prev_datetime = self.datetime - timedelta(days=1)
  85         return prev_datetime.strftime(DATE_FORMAT)
  86
  87     @property
  88     def next_date(self):
  89         """Return date succeeding date of this Day."""
  90         next_datetime = self.datetime + timedelta(days=1)
  91         return next_datetime.strftime(DATE_FORMAT)
  92
  93     def save(self, db_conn: DatabaseConnection):
  94         """Add (or re-write) self to database."""
  95         db_conn.exec('REPLACE INTO days VALUES (?, ?)',
  96                      (self.date, self.comment))