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   1 """Collecting Day and date-related items."""
   2 from datetime import datetime
   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 class Day:
  20     """Individual days defined by their dates."""
  21
  22     def __init__(self, date: str, comment: str = ''):
  23         self.date = date
  24         self.datetime = date_valid(self.date)
  25         if not self.datetime:
  26             raise HandledException(f'Given date of wrong format: {self.date}')
  27         self.comment = comment
  28
  29     def __eq__(self, other: object):
  30         return isinstance(other, self.__class__) and self.date == other.date
  31
  32     def __lt__(self, other):
  33         return self.date < other.date
  34
  35     @classmethod
  36     def from_table_row(cls, row: Row):
  37         """Make new Day from database row."""
  38         return cls(row[0], row[1])
  39
  40     @classmethod
  41     def all(cls, db_conn: DatabaseConnection,
  42             date_range: tuple[str, str] = ('', '')):
  43         """Return list of Days in database within date_range."""
  44         start_date = date_range[0] if date_range[0] else '2024-01-01'
  45         end_date = date_range[1] if date_range[1] else '2030-12-31'
  46         days = []
  47         sql = 'SELECT * FROM days WHERE date >= ? AND date <= ?'
  48         for row in db_conn.exec(sql, (start_date, end_date)):
  49             days += [cls.from_table_row(row)]
  50         days.sort()
  51         return days
  52
  53     @classmethod
  54     def by_date(cls, db_conn: DatabaseConnection, date: str):
  55         """Retrieve Day by date if in DB, else return None."""
  56         for row in db_conn.exec('SELECT * FROM days WHERE date = ?', (date,)):
  57             return cls.from_table_row(row)
  58         return None
  59
  60     @property
  61     def weekday(self):
  62         """Return what weekday matches self.date."""
  63         return self.datetime.strftime('%A')
  64
  65     def save(self, db_conn: DatabaseConnection):
  66         """Add (or re-write) self to database."""
  67         db_conn.exec('REPLACE INTO days VALUES (?, ?)',
  68                      (self.date, self.comment))