open-law/app/controllers/pagination.py

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2023-04-20 13:10:16 +00:00
from flask import request
from flask import current_app as app
from app import schema as s
def create_pagination(total: int, page_size: int = 0) -> s.Pagination:
"""create instance Pagination for current request"""
q = request.args.get("q", type=str, default="")
page = request.args.get("page", type=int, default=1)
page_size = page_size or app.config["DEFAULT_PAGE_SIZE"]
PAGE_LINKS_NUMBER: int = app.config["PAGE_LINKS_NUMBER"]
pages = (total // page_size + 1) if (total % page_size) else (total // page_size)
pages_for_links: list[int] = []
if pages > PAGE_LINKS_NUMBER:
if page <= PAGE_LINKS_NUMBER // 2:
pages_for_links = [n + 1 for n in range(PAGE_LINKS_NUMBER)]
elif pages - page <= PAGE_LINKS_NUMBER // 2:
pages_for_links = [n + 1 for n in range(pages - PAGE_LINKS_NUMBER, pages)]
else:
pages_for_links = list(
range(page - PAGE_LINKS_NUMBER // 2, page + PAGE_LINKS_NUMBER // 2)
)
else:
pages_for_links = [n + 1 for n in range(pages)]
return s.Pagination(
page=page,
pages=pages,
total=total,
query=q,
per_page=page_size,
skip=(page - 1) * page_size,
pages_for_links=pages_for_links,
)