80 lines
2.8 KiB
Python
80 lines
2.8 KiB
Python
import uuid
|
|
from django.utils import timezone
|
|
|
|
class PageLinksGenerator:
|
|
# TODO inherit django paginator
|
|
"""
|
|
Calculate the pages for multiple links pagination.
|
|
length -- the number of page links in pagination
|
|
"""
|
|
def __init__(self, length, current_page, total_pages):
|
|
current_page = int(current_page)
|
|
self.current_page = current_page
|
|
self.previous_page = current_page - 1 if current_page > 1 else None
|
|
self.next_page = current_page + 1 if current_page < total_pages else None
|
|
self.start_page = None
|
|
self.end_page = None
|
|
self.page_range = None
|
|
self.has_prev = None
|
|
self.has_next = None
|
|
|
|
start_page = current_page - length // 2
|
|
end_page = current_page + length // 2
|
|
|
|
# decision is based on the start page and the end page
|
|
# both sides overflow
|
|
if (start_page < 1 and end_page > total_pages)\
|
|
or length >= total_pages:
|
|
self.start_page = 1
|
|
self.end_page = total_pages
|
|
self.has_prev = False
|
|
self.has_next = False
|
|
|
|
elif start_page < 1 and not end_page > total_pages:
|
|
self.start_page = 1
|
|
# this won't overflow because the total pages are more than the length
|
|
self.end_page = end_page - (start_page - 1)
|
|
self.has_prev = False
|
|
if end_page == total_pages:
|
|
self.has_next = False
|
|
else:
|
|
self.has_next = True
|
|
|
|
elif not start_page < 1 and end_page > total_pages:
|
|
self.end_page = total_pages
|
|
self.start_page = start_page - (end_page - total_pages)
|
|
self.has_next = False
|
|
if start_page == 1:
|
|
self.has_prev = False
|
|
else:
|
|
self.has_prev = True
|
|
|
|
# both sides do not overflow
|
|
elif not start_page < 1 and not end_page > total_pages:
|
|
self.start_page = start_page
|
|
self.end_page = end_page
|
|
self.has_prev = True
|
|
self.has_next = True
|
|
|
|
self.first_page = 1
|
|
self.last_page = total_pages
|
|
self.page_range = range(self.start_page, self.end_page + 1)
|
|
# assert self.has_prev is not None and self.has_next is not None
|
|
|
|
|
|
def ChoicesDictGenerator(choices_enum):
|
|
choices_dict = {}
|
|
for attr in dir(choices_enum):
|
|
if not '__' in attr:
|
|
choices_dict[getattr(choices_enum, attr).value] = getattr(choices_enum, attr).label
|
|
return choices_dict
|
|
|
|
def GenerateDateUUIDMediaFilePath(instance, filename, path_root):
|
|
ext = filename.split('.')[-1]
|
|
filename = "%s.%s" % (uuid.uuid4(), ext)
|
|
root = ''
|
|
if path_root.endswith('/'):
|
|
root = path_root
|
|
else:
|
|
root = path_root + '/'
|
|
return root + timezone.now().strftime('%Y/%m/%d') + f'{filename}'
|