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breadcrumbs.py
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breadcrumbs.py
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from __future__ import annotations
from typing import Iterable
from django import template
from django.http import HttpRequest
from django.utils.encoding import force_str
from apps.utils.breadcrumbs import push_breadcrumb_item, BreadcrumbItem
register = template.Library()
@register.simple_tag(takes_context=True)
def breadcrumb_items(context: dict):
req: HttpRequest = context.get("request")
if hasattr(req, "breadcrumbs"):
return req.breadcrumbs
try:
view_titles = req.titles
except AttributeError:
view_titles = ()
req.breadcrumbs = list(
filter(
None,
[
# TODO: slash is not always the home page?
# BreadcrumbTitle(req.membership.section, "/")
# if req.membership
# else None,
# TODO: eg "Home > Docs" doesn't make sense
BreadcrumbItem(apps.verbose_name, f"/{apps.url_prefix}")
if (plugin := req.plugin) and (apps := plugin.app_config)
else None,
]
+ [
BreadcrumbItem(title, req.build_absolute_uri())
if isinstance(title, str)
else title
for title in view_titles
],
)
)
return req.breadcrumbs
@register.simple_tag(takes_context=True)
def breadcrumb_push_item(context: dict, item: str):
request: HttpRequest = context["request"]
push_breadcrumb_item(request=request, item=item)
return ""
@register.filter
def join_breadcrumbs(items: Iterable[BreadcrumbItem], sep=" · "):
return sep.join(map(force_str, map(str, items[::-1])))