131 lines
4.2 KiB
Python
131 lines
4.2 KiB
Python
import functools
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import uuid
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from typing import TYPE_CHECKING
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from django.http import Http404, HttpRequest, HttpResponseRedirect
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from django.utils import timezone
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from django.utils.baseconv import base62
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if TYPE_CHECKING:
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from users.models import APIdentity, User
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class AuthedHttpRequest(HttpRequest):
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"""
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A subclass of HttpRequest for type-checking only
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"""
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user: "User"
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target_identity: "APIdentity"
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class HTTPResponseHXRedirect(HttpResponseRedirect):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self["HX-Redirect"] = self["Location"]
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status_code = 200
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def target_identity_required(func):
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@functools.wraps(func)
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def wrapper(request, user_name, *args, **kwargs):
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from users.models import APIdentity
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from users.views import render_user_blocked, render_user_not_found
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try:
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target = APIdentity.get_by_handler(user_name)
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except APIdentity.DoesNotExist:
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return render_user_not_found(request)
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target_user = target.user
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if target_user and not target_user.is_active:
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return render_user_not_found(request)
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if not target.is_visible_to_user(request.user):
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return render_user_blocked(request)
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request.target_identity = target
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# request.identity = (
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# request.user.identity if request.user.is_authenticated else None
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# )
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return func(request, user_name, *args, **kwargs)
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return wrapper
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class PageLinksGenerator:
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# TODO inherit django paginator
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"""
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Calculate the pages for multiple links pagination.
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length -- the number of page links in pagination
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"""
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def __init__(self, length: int, current_page: int, total_pages: int):
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current_page = int(current_page)
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self.current_page = current_page
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self.previous_page = current_page - 1 if current_page > 1 else None
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self.next_page = current_page + 1 if current_page < total_pages else None
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self.start_page = 1
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self.end_page = 1
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self.page_range = None
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self.has_prev = None
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self.has_next = None
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start_page = current_page - length // 2
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end_page = current_page + length // 2
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# decision is based on the start page and the end page
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# both sides overflow
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if (start_page < 1 and end_page > total_pages) or length >= total_pages:
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self.start_page = 1
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self.end_page = total_pages
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self.has_prev = False
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self.has_next = False
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elif start_page < 1 and not end_page > total_pages:
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self.start_page = 1
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# this won't overflow because the total pages are more than the length
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self.end_page = end_page - (start_page - 1)
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self.has_prev = False
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if end_page == total_pages:
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self.has_next = False
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else:
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self.has_next = True
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elif not start_page < 1 and end_page > total_pages:
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self.end_page = total_pages
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self.start_page = start_page - (end_page - total_pages)
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self.has_next = False
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if start_page == 1:
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self.has_prev = False
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else:
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self.has_prev = True
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# both sides do not overflow
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elif not start_page < 1 and not end_page > total_pages:
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self.start_page = start_page
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self.end_page = end_page
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self.has_prev = True
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self.has_next = True
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self.first_page = 1
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self.last_page = total_pages
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self.page_range = range(self.start_page, self.end_page + 1)
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# assert self.has_prev is not None and self.has_next is not None
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def GenerateDateUUIDMediaFilePath(instance, filename, path_root):
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ext = filename.split(".")[-1]
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filename = "%s.%s" % (uuid.uuid4(), ext)
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root = ""
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if path_root.endswith("/"):
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root = path_root
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else:
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root = path_root + "/"
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return root + timezone.now().strftime("%Y/%m/%d") + f"{filename}"
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def get_uuid_or_404(uuid_b62):
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try:
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i = base62.decode(uuid_b62)
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return uuid.UUID(int=i)
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except ValueError:
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raise Http404("Malformed Base62 UUID")
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