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from django.http import Http404
from users.models import Domain, Identity
def by_handle_or_404(request, handle, local=True, fetch=False) -> Identity:
"""
Retrieves an Identity by its long or short handle.
Domain-sensitive, so it will understand short handles on alternate domains.
"""
if "@" not in handle:
if "host" not in request.headers:
raise Http404("No hostname available")
username = handle
domain_instance = Domain.get_domain(request.headers["host"])
if domain_instance is None:
raise Http404("No matching domains found")
domain = domain_instance.domain
else:
username, domain = handle.split("@", 1)
# Resolve the domain to the display domain
domain_instance = Domain.get_domain(domain)
if domain_instance is None:
domain_instance = Domain.get_remote_domain(domain)
domain = domain_instance.domain
identity = Identity.by_username_and_domain(
username,
domain,
local=local,
fetch=fetch,
)
if identity is None:
raise Http404(f"No identity for handle {handle}")
if identity.blocked:
raise Http404("Blocked user")
return identity
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