606 lines
20 KiB
Python
606 lines
20 KiB
Python
# The accounting application of the Mia project.
|
|
# by imacat <imacat@mail.imacat.idv.tw>, 2020/6/30
|
|
|
|
# Copyright (c) 2020 imacat.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""The period chooser utilities of the Mia core application.
|
|
|
|
"""
|
|
import datetime
|
|
import re
|
|
|
|
from django.core.serializers.json import DjangoJSONEncoder
|
|
from django.template import defaultfilters
|
|
from django.utils import dateformat, timezone
|
|
from django.utils.translation import gettext
|
|
|
|
from mia_core.utils import Language
|
|
|
|
|
|
class Period:
|
|
"""The template helper for the period chooser.
|
|
|
|
Args:
|
|
spec (str): The current period specification
|
|
data_start (datetime.date): The available first day of the data.
|
|
data_end (datetime.date): The available last day of the data.
|
|
"""
|
|
def __init__(self, spec=None, data_start=None, data_end=None):
|
|
self._period = self.Parser(spec)
|
|
self._data_start = data_start
|
|
self._data_end = data_end
|
|
|
|
@property
|
|
def spec(self):
|
|
"""Returns the period specification.
|
|
|
|
Returns:
|
|
str: The period specification.
|
|
"""
|
|
return self._period.spec
|
|
|
|
@property
|
|
def start(self):
|
|
"""Returns the start day of the currently-specified period.
|
|
|
|
Returns:
|
|
datetime.date: The start day of the currently-specified period.
|
|
"""
|
|
return self._period.start
|
|
|
|
@property
|
|
def end(self):
|
|
"""Returns the end day of the currently-specified period.
|
|
|
|
Returns:
|
|
datetime.date: The end day of the currently-specified period.
|
|
"""
|
|
return self._period.end
|
|
|
|
@property
|
|
def description(self):
|
|
"""Returns the text description of the currently-specified period.
|
|
|
|
Returns:
|
|
str: The text description of the currently-specified period
|
|
"""
|
|
return self._period.description
|
|
|
|
@property
|
|
def error(self):
|
|
"""Returns the error of the period specification format.
|
|
|
|
Returns:
|
|
str|None: The error of the period specification format, or None on
|
|
success.
|
|
"""
|
|
return self._period.error
|
|
|
|
@staticmethod
|
|
def _get_last_month_start():
|
|
"""Returns the first day of the last month.
|
|
|
|
Returns:
|
|
datetime.date: The first day of the last month.
|
|
"""
|
|
today = timezone.localdate()
|
|
month = today.month - 1
|
|
year = today.year
|
|
if month < 1:
|
|
month = 12
|
|
year = year - 1
|
|
return datetime.date(year, month, 1)
|
|
|
|
@staticmethod
|
|
def _get_next_month_start():
|
|
"""Returns the first day of the next month.
|
|
|
|
Returns:
|
|
datetime.date: The first day of the next month.
|
|
"""
|
|
today = timezone.localdate()
|
|
month = today.month + 1
|
|
year = today.year
|
|
if month > 12:
|
|
month = 1
|
|
year = year + 1
|
|
return datetime.date(year, month, 1)
|
|
|
|
def this_month(self):
|
|
"""Returns the specification of this month.
|
|
|
|
Returns:
|
|
str|None: The specification of this month, or None if there is no
|
|
data in or before this month.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
today = timezone.localdate()
|
|
first_month_start = datetime.date(
|
|
self._data_start.year, self._data_start.month, 1)
|
|
if today < first_month_start:
|
|
return None
|
|
return dateformat.format(today, "Y-m")
|
|
|
|
def last_month(self):
|
|
"""Returns the specification of last month.
|
|
|
|
Returns:
|
|
str|None: The specification of last month, or None if there is no
|
|
data in or before last month.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
last_month_start = self._get_last_month_start()
|
|
first_month_start = datetime.date(
|
|
self._data_start.year, self._data_start.month, 1)
|
|
if last_month_start < first_month_start:
|
|
return None
|
|
return dateformat.format(last_month_start, "Y-m")
|
|
|
|
def since_last_month(self):
|
|
"""Returns the specification since last month.
|
|
|
|
Returns:
|
|
str|None: The specification since last month, or None if there is
|
|
no data in or before last month.
|
|
"""
|
|
last_month = self.last_month()
|
|
if last_month is None:
|
|
return None
|
|
return last_month + "-"
|
|
|
|
def has_months_to_choose(self):
|
|
"""Returns whether there are months to choose besides this month and
|
|
last month.
|
|
|
|
Returns:
|
|
bool: True if there are months to choose besides this month and
|
|
last month, or False otherwise.
|
|
"""
|
|
if self._data_start is None:
|
|
return False
|
|
if self._data_start < self._get_last_month_start():
|
|
return True
|
|
if self._data_end >= self._get_next_month_start():
|
|
return True
|
|
return False
|
|
|
|
def chosen_month(self):
|
|
"""Returns the specification of the chosen month, or None if the
|
|
current period is not a month or is out of available data range.
|
|
|
|
Returns:
|
|
str|None: The specification of the chosen month, or None if the
|
|
current period is not a month or is out of available data
|
|
range.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
m = re.match("^[0-9]{4}-[0-2]{2}", self._period.spec)
|
|
if m is None:
|
|
return None
|
|
if self._period.end < self._data_start:
|
|
return None
|
|
if self._period.start > self._data_end:
|
|
return None
|
|
return self._period.spec
|
|
|
|
def this_year(self):
|
|
"""Returns the specification of this year.
|
|
|
|
Returns:
|
|
str|None: The specification of this year, or None if there is no
|
|
data in or before this year.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
this_year = timezone.localdate().year
|
|
if this_year < self._data_start.year:
|
|
return None
|
|
return str(this_year)
|
|
|
|
def last_year(self):
|
|
"""Returns the specification of last year.
|
|
|
|
Returns:
|
|
str|None: The specification of last year, or None if there is no
|
|
data in or before last year.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
last_year = timezone.localdate().year - 1
|
|
if last_year < self._data_start.year:
|
|
return None
|
|
return str(last_year)
|
|
|
|
def has_years_to_choose(self):
|
|
"""Returns whether there are years to choose besides this year and
|
|
last year.
|
|
|
|
Returns:
|
|
bool: True if there are years to choose besides this year and
|
|
last year, or False otherwise.
|
|
"""
|
|
if self._data_start is None:
|
|
return False
|
|
this_year = timezone.localdate().year
|
|
if self._data_start.year < this_year - 1:
|
|
return True
|
|
if self._data_end.year > this_year:
|
|
return True
|
|
return False
|
|
|
|
def years_to_choose(self):
|
|
"""Returns the years to choose besides this year and last year.
|
|
|
|
Returns:
|
|
list[str]: The years to choose besides this year and last year.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
this_year = timezone.localdate().year
|
|
before = [str(x) for x in range(
|
|
self._data_start.year, this_year - 1)]
|
|
after = [str(x) for x in range(
|
|
self._data_end.year, this_year, -1)]
|
|
return after + before[::-1]
|
|
|
|
def today(self):
|
|
"""Returns the specification of today.
|
|
|
|
Returns:
|
|
(str): The specification of today, or None if there is no data
|
|
in or before today.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
today = timezone.localdate()
|
|
if today < self._data_start or today > self._data_end:
|
|
return None
|
|
return dateformat.format(today, "Y-m-d")
|
|
|
|
def yesterday(self):
|
|
"""Returns the specification of yesterday.
|
|
|
|
Returns:
|
|
(str): The specification of yesterday, or None if there is no data
|
|
in or before yesterday.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
yesterday = timezone.localdate() - datetime.timedelta(days=1)
|
|
if yesterday < self._data_start or yesterday > self._data_end:
|
|
return None
|
|
return dateformat.format(yesterday, "Y-m-d")
|
|
|
|
def chosen_day(self):
|
|
"""Returns the specification of the chosen day.
|
|
|
|
Returns:
|
|
(str): The specification of the chosen day, or the start day
|
|
of the period if the current period is not a day.
|
|
"""
|
|
return dateformat.format(self._period.start, "Y-m-d")
|
|
|
|
def has_days_to_choose(self):
|
|
"""Returns whether there are more than one day to choose from.
|
|
|
|
Returns:
|
|
bool: True if there are more than one day to choose from,
|
|
or False otherwise.
|
|
"""
|
|
if self._data_start is None:
|
|
return False
|
|
if self._data_start == self._data_end:
|
|
return False
|
|
return True
|
|
|
|
def first_day(self):
|
|
"""Returns the specification of the available first day.
|
|
|
|
Returns:
|
|
str: The specification of the available first day.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
return dateformat.format(self._data_start, "Y-m-d")
|
|
|
|
def last_day(self):
|
|
"""Returns the specification of the available last day.
|
|
|
|
Returns:
|
|
str: The specification of the available last day.
|
|
"""
|
|
if self._data_end is None:
|
|
return None
|
|
return dateformat.format(self._data_end, "Y-m-d")
|
|
|
|
def chosen_start(self):
|
|
"""Returns the specification of of the first day of the
|
|
specified period.
|
|
|
|
Returns:
|
|
str: The specification of of the first day of the
|
|
specified period.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
day = self._period.start \
|
|
if self._period.start >= self._data_start \
|
|
else self._data_start
|
|
return dateformat.format(day, "Y-m-d")
|
|
|
|
def chosen_end(self):
|
|
"""Returns the specification of of the last day of the
|
|
specified period.
|
|
|
|
Returns:
|
|
str: The specification of of the last day of the
|
|
specified period.
|
|
"""
|
|
if self._data_end is None:
|
|
return None
|
|
day = self._period.end \
|
|
if self._period.end <= self._data_end \
|
|
else self._data_end
|
|
return dateformat.format(day, "Y-m-d")
|
|
|
|
def month_picker_params(self):
|
|
"""Returns the parameters for the month-picker, as a JSON text string.
|
|
|
|
Returns:
|
|
str: The parameters for the month-picker, as a JSON text string.
|
|
"""
|
|
if self._data_start is None:
|
|
return None
|
|
start = datetime.date(self._data_start.year, self._data_start.month, 1)
|
|
return DjangoJSONEncoder().encode({
|
|
"locale": Language.current().locale,
|
|
"minDate": start,
|
|
"maxDate": self._data_end,
|
|
"defaultDate": self.chosen_month(),
|
|
})
|
|
|
|
@staticmethod
|
|
def default_spec():
|
|
"""Returns the specification for the default period.
|
|
|
|
Returns:
|
|
str: The specification for the default period
|
|
"""
|
|
return dateformat.format(timezone.localdate(), "Y-m")
|
|
|
|
class Parser:
|
|
"""The period parser.
|
|
|
|
Args:
|
|
spec (str|None): The period specification.
|
|
|
|
Attributes:
|
|
spec (str): The currently-using period specification.
|
|
start (date): The start of the period.
|
|
end (date): The end of the period.
|
|
description (str): The text description of the period.
|
|
error (str): The period specification format error, or
|
|
None on success.
|
|
"""
|
|
def __init__(self, spec):
|
|
self.spec = None
|
|
self.start = None
|
|
self.end = None
|
|
self.description = None
|
|
self.error = None
|
|
|
|
if spec is None:
|
|
self.set_this_month()
|
|
return
|
|
self.spec = spec
|
|
# A specific month
|
|
m = re.match("^([0-9]{4})-([0-9]{2})$", spec)
|
|
if m is not None:
|
|
year = int(m.group(1))
|
|
month = int(m.group(2))
|
|
try:
|
|
self.start = datetime.date(year, month, 1)
|
|
except ValueError:
|
|
self.invalid_period()
|
|
return
|
|
self.end = self.get_month_last_day(self.start)
|
|
self.description = self.get_month_text(year, month)
|
|
return
|
|
# From a specific month
|
|
m = re.match("^([0-9]{4})-([0-9]{2})-$", spec)
|
|
if m is not None:
|
|
year = int(m.group(1))
|
|
month = int(m.group(2))
|
|
try:
|
|
self.start = datetime.date(year, month, 1)
|
|
except ValueError:
|
|
self.invalid_period()
|
|
return
|
|
self.end = self.get_month_last_day(
|
|
timezone.localdate())
|
|
self.description = gettext(
|
|
"Since %s") % self.get_month_text(year, month)
|
|
return
|
|
# A specific year
|
|
m = re.match("^([0-9]{4})$", spec)
|
|
if m is not None:
|
|
year = int(m.group(1))
|
|
try:
|
|
self.start = datetime.date(year, 1, 1)
|
|
except ValueError:
|
|
self.invalid_period()
|
|
return
|
|
self.end = datetime.date(year, 12, 31)
|
|
today = timezone.localdate()
|
|
if year == today.year:
|
|
self.description = gettext("This Year")
|
|
elif year == today.year - 1:
|
|
self.description = gettext("Last Year")
|
|
else:
|
|
self.description = str(year)
|
|
return
|
|
# All time
|
|
if spec == "-":
|
|
self.start = datetime.date(2000, 1, 1)
|
|
self.end = self.get_month_last_day(
|
|
timezone.localdate())
|
|
self.description = gettext("All")
|
|
return
|
|
# A specific date
|
|
m = re.match("^([0-9]{4})-([0-9]{2})-([0-9]{2})$",
|
|
spec)
|
|
if m is not None:
|
|
try:
|
|
self.start = datetime.date(
|
|
int(m.group(1)),
|
|
int(m.group(2)),
|
|
int(m.group(3)))
|
|
except ValueError:
|
|
self.invalid_period()
|
|
return
|
|
self.end = self.start
|
|
self.description = self.get_date_text(self.start)
|
|
return
|
|
# A specific date period
|
|
m = re.match(("^([0-9]{4})-([0-9]{2})-([0-9]{2})"
|
|
"-([0-9]{4})-([0-9]{2})-([0-9]{2})$"),
|
|
spec)
|
|
if m is not None:
|
|
try:
|
|
self.start = datetime.date(
|
|
int(m.group(1)),
|
|
int(m.group(2)),
|
|
int(m.group(3)))
|
|
self.end = datetime.date(
|
|
int(m.group(4)),
|
|
int(m.group(5)),
|
|
int(m.group(6)))
|
|
except ValueError:
|
|
self.invalid_period()
|
|
return
|
|
today = timezone.localdate()
|
|
# Spans several years
|
|
if self.start.year != self.end.year:
|
|
self.description = "%s-%s" % (
|
|
defaultfilters.date(self.start, "Y/n/j"),
|
|
defaultfilters.date(self.end, "Y/n/j"))
|
|
# Spans several months
|
|
elif self.start.month != self.end.month:
|
|
if self.start.year != today.year:
|
|
self.description = "%s-%s" % (
|
|
defaultfilters.date(self.start, "Y/n/j"),
|
|
defaultfilters.date(self.end, "n/j"))
|
|
else:
|
|
self.description = "%s-%s" % (
|
|
defaultfilters.date(self.start, "n/j"),
|
|
defaultfilters.date(self.end, "n/j"))
|
|
# Spans several days
|
|
elif self.start.day != self.end.day:
|
|
if self.start.year != today.year:
|
|
self.description = "%s-%s" % (
|
|
defaultfilters.date(self.start, "Y/n/j"),
|
|
defaultfilters.date(self.end, "j"))
|
|
else:
|
|
self.description = "%s-%s" % (
|
|
defaultfilters.date(self.start, "n/j"),
|
|
defaultfilters.date(self.end, "j"))
|
|
# At the same day
|
|
else:
|
|
self.spec = dateformat.format(self.start, "Y-m-d")
|
|
self.description = self.get_date_text(self.start)
|
|
return
|
|
# Wrong period format
|
|
self.invalid_period()
|
|
|
|
def set_this_month(self):
|
|
"""Sets the period to this month."""
|
|
today = timezone.localdate()
|
|
self.spec = dateformat.format(today, "Y-m")
|
|
self.start = datetime.date(today.year, today.month, 1)
|
|
self.end = self.get_month_last_day(self.start)
|
|
self.description = gettext("This Month")
|
|
|
|
def invalid_period(self):
|
|
"""Sets the period when the period specification is
|
|
invalid.
|
|
"""
|
|
self.error = gettext("Invalid period.")
|
|
self.set_this_month()
|
|
|
|
@staticmethod
|
|
def get_month_last_day(day):
|
|
"""Calculates and returns the last day of a month.
|
|
|
|
Args:
|
|
day (date): A day in the month.
|
|
|
|
Returns:
|
|
date: The last day in the month
|
|
"""
|
|
next_month = day.month + 1
|
|
next_year = day.year
|
|
if next_month > 12:
|
|
next_month = 1
|
|
next_year = next_year + 1
|
|
return datetime.date(
|
|
next_year, next_month, 1) - datetime.timedelta(days=1)
|
|
|
|
@staticmethod
|
|
def get_month_text(year, month):
|
|
"""Returns the text description of a month.
|
|
|
|
Args:
|
|
year (int): The year.
|
|
month (int): The month.
|
|
|
|
Returns:
|
|
str: The description of the month.
|
|
"""
|
|
today = timezone.localdate()
|
|
if year == today.year and month == today.month:
|
|
return gettext("This Month")
|
|
prev_month = today.month - 1
|
|
prev_year = today.year
|
|
if prev_month < 1:
|
|
prev_month = 12
|
|
prev_year = prev_year - 1
|
|
prev = datetime.date(prev_year, prev_month, 1)
|
|
if year == prev.year and month == prev.month:
|
|
return gettext("Last Month")
|
|
return "%d/%d" % (year, month)
|
|
|
|
@staticmethod
|
|
def get_date_text(day):
|
|
"""Returns the text description of a day.
|
|
|
|
Args:
|
|
day (date): The date.
|
|
|
|
Returns:
|
|
str: The description of the day.
|
|
"""
|
|
today = timezone.localdate()
|
|
if day == today:
|
|
return gettext("Today")
|
|
elif day == today - datetime.timedelta(days=1):
|
|
return gettext("Yesterday")
|
|
elif day.year != today.year:
|
|
return defaultfilters.date(day, "Y/n/j")
|
|
else:
|
|
return defaultfilters.date(day, "n/j")
|