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views.py
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# -*- coding: utf-8 -*-

from django.contrib.auth.decorators import user_passes_test
from django.utils.decorators import method_decorator
from django.views.generic import ListView, DetailView
from django.http import Http404
from django.utils import timezone

from rest_framework import viewsets, permissions
from django_filters.rest_framework import DjangoFilterBackend

from .models import Article, Issue, ArticleMembership, ArticleMembershipWeb
from .models import License, Rubric, Contribution, Contributor, Role, Tag
from .serializers import RubricSerializer, RoleSerializer, ContributorSerializer, ContributionSerializer, LicenseSerializer, IssueSerializer, ArticleSerializer, ArticleMembershipSerializer, TagSerializer


# ViewSets define the view behavior.
class TagViewSet(viewsets.ModelViewSet):
    queryset = Tag.objects.all()
    serializer_class = TagSerializer
    permission_classes = (permissions.IsAdminUser,)


# ViewSets define the view behavior.
class RubricViewSet(viewsets.ModelViewSet):
    queryset = Rubric.objects.all()
    serializer_class = RubricSerializer
    permission_classes = (permissions.IsAdminUser,)


#  ViewSets define the view behavior.
class RoleViewSet(viewsets.ModelViewSet):
    queryset = Role.objects.all()
    serializer_class = RoleSerializer
    permission_classes = (permissions.IsAdminUser,)


#  ViewSets define the view behavior.
class ContributorViewSet(viewsets.ModelViewSet):
    queryset = Contributor.objects.all()
    serializer_class = ContributorSerializer
    permission_classes = (permissions.IsAdminUser,)


#  ViewSets define the view behavior.
class ContributionViewSet(viewsets.ModelViewSet):
    queryset = Contribution.objects.all()
    serializer_class = ContributionSerializer
    permission_classes = (permissions.IsAdminUser,)


# ViewSets define the view behavior.
class LicenseViewSet(viewsets.ModelViewSet):
    queryset = License.objects.all()
    serializer_class = LicenseSerializer
    permission_classes = (permissions.IsAdminUser,)


# ViewSets define the view behavior.
class IssueViewSet(viewsets.ModelViewSet):
    queryset = Issue.objects.all()
    serializer_class = IssueSerializer
    permission_classes = (permissions.IsAdminUser,)


class ArticleViewSet(viewsets.ModelViewSet):
    queryset = Article.objects.all()
    serializer_class = ArticleSerializer
    permission_classes = (permissions.IsAdminUser,)


class ArticleMembershipViewSet(viewsets.ModelViewSet):
    queryset = ArticleMembership.objects.all()
    serializer_class = ArticleMembershipSerializer
    filter_backends = (DjangoFilterBackend,)
    filter_fields = ('issue', 'issue__id')
    permission_classes = (permissions.IsAdminUser,)


class IssueListView(ListView):
    """
    Archive with all the magazines (not finished yet, and only accessible to superuser)
    """
    model = Issue

    @method_decorator(user_passes_test(lambda u: u.is_superuser))
    def dispatch(self, *args, **kwargs):
        return super(IssueListView, self).dispatch(*args, **kwargs)


class IssueDetailView(DetailView):
    """
    The Table of Contents for an issue
    """
    model = Issue


class ContributorListView(ListView):
    """
    A list of all contributors
    """
    model = Contributor


class ContributorDetailView(DetailView):
    """
    The Table of Contents for an issue
    """
    model = Contributor


class ArticleListView(ListView):
    """
    Archive of articles published on the web
    """
    queryset = Article.objects.filter(published_online=True)
    paginate_by = 10


class ArticleDetailView(DetailView):
    """
    An article
    """
    model = Article

    def get_object(self):
        object = super(ArticleDetailView, self).get_object()
        # object is marked as published online and/or is published on the timeline:
        if object.published_online or object.articlemembershipweb_set.count():
            return object
        # superusers get to read anything
        if self.request.user.is_superuser:
            return object
        # if none of the above, raise a 404
        raise Http404


class ArticleMembershipWebListView(ListView):
    """
    List view for articles published online (the homepage)
    """

    template_name = 'feed.html'

    def get_queryset(self):
        """ Do not publish article in the future """
        return ArticleMembershipWeb.objects.filter(web_publish_date__lte=timezone.now())


class PileDeMedorsView(ListView):
    """
    List view for articles published online (the homepage)
    """

    template_name = 'publish/pile-de-medors.svg'
    content_type= 'image/svg+xml'

    def get_queryset(self):
        return Issue.objects.order_by("-id").filter(published_online=True)[:4]