| 1 | import functools |
| 2 | |
| 3 | from django.http import HttpResponseForbidden |
| 4 | from django.shortcuts import get_object_or_404 |
| 5 | |
| 6 | from .models import XGroup, Membership |
| 7 | |
| 8 | |
| 9 | def with_group(view_func): |
| 10 | """Converts a group slug into a XGroup object. |
| 11 | |
| 12 | Example: |
| 13 | >>> @with_group |
| 14 | ... def my_view(request, group, *args, **kwargs): |
| 15 | ... # group is now a XGroup instance |
| 16 | """ |
| 17 | |
| 18 | @functools.wraps(view_func) |
| 19 | def wrapped_view_func(request, group_slug, *args, **kwargs): |
| 20 | group = get_object_or_404(XGroup, short=group_slug) |
| 21 | |
| 22 | request.group = group |
| 23 | |
| 24 | return view_func(request, group, *args, **kwargs) |
| 25 | |
| 26 | return wrapped_view_func |
| 27 | |
| 28 | |
| 29 | class group_required(object): |
| 30 | """Force a minimum group membership level. |
| 31 | |
| 32 | Also combines with_group features: |
| 33 | - fetches the XGroup object, |
| 34 | - sets request.group |
| 35 | - sets request.membership |
| 36 | |
| 37 | Usage: |
| 38 | |
| 39 | >>> @group_required(level=Membership.LEVEL_MEMBER) |
| 40 | ... def my_view(request, group, *args, **kwargs): |
| 41 | ... pass |
| 42 | """ |
| 43 | |
| 44 | def __init__(self, level=Membership.LEVEL_MEMBER): |
| 45 | self.level = level |
| 46 | |
| 47 | def __call__(self, view_func): |
| 48 | @functools.wraps(view_func) |
| 49 | def wrapped_view_func(request, group_slug, *args, **kwargs): |
| 50 | group = get_object_or_404(XGroup, short=group_slug) |
| 51 | if not request.user.is_authenticated(): |
| 52 | return HttpResponseForbidden() |
| 53 | |
| 54 | try: |
| 55 | membership = request.user.memberships.get( |
| 56 | xgroup=group, |
| 57 | level__gte=self.level, |
| 58 | state='enabled', |
| 59 | ) |
| 60 | except Membership.DoesNotExist: |
| 61 | membership = None |
| 62 | |
| 63 | request.group = group |
| 64 | request.membership = membership |
| 65 | |
| 66 | if membership: |
| 67 | return view_func(request, group, *args, membership=membership, **kwargs) |
| 68 | else: |
| 69 | return HttpResponseForbidden() |
| 70 | return wrapped_view_func |