33 lines
1,020 B
Python
33 lines
1,020 B
Python
from typing import Callable
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from django.core.paginator import Page, Paginator
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from django.shortcuts import redirect
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from lemoncurry.middleware import ResponseException
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def paginate(queryset, reverse: Callable[[int], str], page: int | None) -> Page:
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def redirect_to_page(i: int):
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raise ResponseException(redirect(reverse(i)))
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def reversible(p: Page) -> Page:
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p.reverse = reverse
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return p
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paginator = Paginator(queryset, 10)
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# If no page number was specified, return page one.
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if page is None:
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return reversible(paginator.page(1))
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# If the first page was explicitly requested, or the page number was negative, redirect to page one with no URL suffix.
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if page <= 1:
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redirect_to_page(1)
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# If the page requested is larger than the last page, then redirect to the last page.
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if page > paginator.num_pages:
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redirect_to_page(paginator.num_pages)
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# Just return the current page! Hooray!
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return reversible(paginator.page(page))
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