81 lines
2.3 KiB
Python
81 lines
2.3 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 utilities of the accounting application.
|
|
|
|
"""
|
|
|
|
|
|
class PeriodParser:
|
|
"""The period parser.
|
|
|
|
Args:
|
|
period_spec (str): The period specification.
|
|
|
|
Attributes:
|
|
start (str): The start of the period.
|
|
end (str): The end of the period.
|
|
"""
|
|
start = None
|
|
end = None
|
|
|
|
def __init__(self, period_spec):
|
|
self.start = period_spec + "-01"
|
|
self.end = period_spec + "-30"
|
|
|
|
|
|
class Pagination:
|
|
"""The pagination.
|
|
|
|
Args:
|
|
count (int): The total number of records
|
|
page_no (int): The specified page number
|
|
page_size (int): The specified number of records per page
|
|
is_reverse (bool): Whether we should display the last
|
|
page first
|
|
|
|
Raises:
|
|
PageNoOutOfRangeError: if the specified page number is out
|
|
of range or is redundant.
|
|
|
|
Attributes:
|
|
page_no (int): The current page number
|
|
page_size (int): The page size
|
|
"""
|
|
page_no = None
|
|
page_size = None
|
|
|
|
DEFAULT_PAGE_SIZE = 10
|
|
|
|
def __init__(self, count, page_no, page_size, is_reverse=False):
|
|
self.page_size = page_size \
|
|
if page_size is not None \
|
|
else self.DEFAULT_PAGE_SIZE
|
|
total_pages = int((count - 1) / self.page_size) + 1
|
|
default_page = 1 if not is_reverse else total_pages
|
|
if page_no == default_page:
|
|
raise PageNoOutOfRangeError()
|
|
self.page_no = page_no \
|
|
if page_no is not None \
|
|
else default_page
|
|
if self.page_no > total_pages:
|
|
raise PageNoOutOfRangeError()
|
|
|
|
|
|
class PageNoOutOfRangeError(Exception):
|
|
pass
|