Sith/core/views/files.py
2024-06-24 13:27:22 +02:00

423 lines
14 KiB
Python

# -*- coding:utf-8 -*
#
# Copyright 2023 © AE UTBM
# ae@utbm.fr / ae.info@utbm.fr
#
# This file is part of the website of the UTBM Student Association (AE UTBM),
# https://ae.utbm.fr.
#
# You can find the source code of the website at https://github.com/ae-utbm/sith3
#
# LICENSED UNDER THE GNU GENERAL PUBLIC LICENSE VERSION 3 (GPLv3)
# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE
# OR WITHIN THE LOCAL FILE "LICENSE"
#
#
# This file contains all the views that concern the page model
from django.shortcuts import redirect, get_object_or_404
from django.utils.http import http_date
from django.views.generic import ListView, DetailView, TemplateView
from django.views.generic.edit import UpdateView, FormMixin, DeleteView
from django.views.generic.detail import SingleObjectMixin
from django.forms.models import modelform_factory
from django.conf import settings
from django.utils.translation import gettext_lazy as _
from django.http import Http404, HttpResponse
from wsgiref.util import FileWrapper
from django.urls import reverse
from django.core.exceptions import PermissionDenied
from django import forms
import os
from ajax_select import make_ajax_field
from core.models import SithFile, RealGroup, Notification
from core.views import (
CanViewMixin,
CanEditMixin,
CanEditPropMixin,
can_view,
)
from counter.models import Counter
def send_file(request, file_id, file_class=SithFile, file_attr="file"):
"""
Send a file through Django without loading the whole file into
memory at once. The FileWrapper will turn the file object into an
iterator for chunks of 8KB.
"""
f = get_object_or_404(file_class, id=file_id)
if not (
can_view(f, request.user)
or (
"counter_token" in request.session.keys()
and request.session["counter_token"]
and Counter.objects.filter( # check if not null for counters that have no token set
token=request.session["counter_token"]
).exists()
)
):
raise PermissionDenied
name = f.__getattribute__(file_attr).name
filepath = os.path.join(settings.MEDIA_ROOT, name)
# check if file exists on disk
if not os.path.exists(filepath.encode("utf-8")):
raise Http404()
with open(filepath.encode("utf-8"), "rb") as filename:
wrapper = FileWrapper(filename)
response = HttpResponse(wrapper, content_type=f.mime_type)
response["Last-Modified"] = http_date(f.date.timestamp())
response["Content-Length"] = os.path.getsize(filepath.encode("utf-8"))
response["Content-Disposition"] = ('inline; filename="%s"' % f.name).encode(
"utf-8"
)
return response
class MultipleFileInput(forms.ClearableFileInput):
allow_multiple_selected = True
class _MultipleFieldMixin:
def __init__(self, *args, **kwargs):
kwargs.setdefault("widget", MultipleFileInput())
super().__init__(*args, **kwargs)
def clean(self, data, initial=None):
single_file_clean = super().clean
if isinstance(data, (list, tuple)):
result = [single_file_clean(d, initial) for d in data]
else:
result = [single_file_clean(data, initial)]
return result
class MultipleFileField(_MultipleFieldMixin, forms.FileField):
...
class MultipleImageField(_MultipleFieldMixin, forms.ImageField):
...
class AddFilesForm(forms.Form):
folder_name = forms.CharField(
label=_("Add a new folder"), max_length=30, required=False
)
file_field = MultipleFileField(
label=_("Files"),
required=False,
)
def process(self, parent, owner, files):
notif = False
try:
if self.cleaned_data["folder_name"] != "":
folder = SithFile(
parent=parent, name=self.cleaned_data["folder_name"], owner=owner
)
folder.clean()
folder.save()
notif = True
except Exception as e:
self.add_error(
None,
_("Error creating folder %(folder_name)s: %(msg)s")
% {"folder_name": self.cleaned_data["folder_name"], "msg": repr(e)},
)
for f in files:
new_file = SithFile(
parent=parent,
name=f.name,
file=f,
owner=owner,
is_folder=False,
mime_type=f.content_type,
size=f.size,
)
try:
new_file.clean()
new_file.save()
notif = True
except Exception as e:
self.add_error(
None,
_("Error uploading file %(file_name)s: %(msg)s")
% {"file_name": f, "msg": repr(e)},
)
if notif:
for u in (
RealGroup.objects.filter(id=settings.SITH_GROUP_COM_ADMIN_ID)
.first()
.users.all()
):
if not u.notifications.filter(
type="FILE_MODERATION", viewed=False
).exists():
Notification(
user=u,
url=reverse("core:file_moderation"),
type="FILE_MODERATION",
).save()
class FileListView(ListView):
template_name = "core/file_list.jinja"
context_object_name = "file_list"
def get_queryset(self):
return SithFile.objects.filter(parent=None)
def get_context_data(self, **kwargs):
kwargs = super(FileListView, self).get_context_data(**kwargs)
kwargs["popup"] = ""
if self.kwargs.get("popup") is not None:
kwargs["popup"] = "popup"
return kwargs
class FileEditView(CanEditMixin, UpdateView):
model = SithFile
pk_url_kwarg = "file_id"
template_name = "core/file_edit.jinja"
context_object_name = "file"
def get(self, request, *args, **kwargs):
self.object = self.get_object()
if not self.object.can_be_managed_by(request.user):
raise PermissionDenied
return super(FileEditView, self).get(request, *args, **kwargs)
def get_form_class(self):
fields = ["name", "is_moderated"]
if self.object.is_file:
fields = ["file"] + fields
return modelform_factory(SithFile, fields=fields)
def get_success_url(self):
if self.kwargs.get("popup") is not None:
return reverse(
"core:file_detail", kwargs={"file_id": self.object.id, "popup": "popup"}
)
return reverse(
"core:file_detail", kwargs={"file_id": self.object.id, "popup": ""}
)
def get_context_data(self, **kwargs):
kwargs = super(FileEditView, self).get_context_data(**kwargs)
kwargs["popup"] = ""
if self.kwargs.get("popup") is not None:
kwargs["popup"] = "popup"
return kwargs
class FileEditPropForm(forms.ModelForm):
class Meta:
model = SithFile
fields = ["parent", "owner", "edit_groups", "view_groups"]
parent = make_ajax_field(SithFile, "parent", "files", help_text="")
edit_groups = make_ajax_field(
SithFile, "edit_groups", "groups", help_text="", label=_("edit group")
)
view_groups = make_ajax_field(
SithFile, "view_groups", "groups", help_text="", label=_("view group")
)
recursive = forms.BooleanField(label=_("Apply rights recursively"), required=False)
class FileEditPropView(CanEditPropMixin, UpdateView):
model = SithFile
pk_url_kwarg = "file_id"
template_name = "core/file_edit.jinja"
context_object_name = "file"
form_class = FileEditPropForm
def get(self, request, *args, **kwargs):
self.object = self.get_object()
if not self.object.can_be_managed_by(request.user):
raise PermissionDenied
return super(FileEditPropView, self).get(request, *args, **kwargs)
def get_form(self, form_class=None):
form = super(FileEditPropView, self).get_form(form_class)
form.fields["parent"].queryset = SithFile.objects.filter(is_folder=True)
return form
def form_valid(self, form):
ret = super(FileEditPropView, self).form_valid(form)
if form.cleaned_data["recursive"]:
self.object.apply_rights_recursively()
return ret
def get_success_url(self):
return reverse(
"core:file_detail",
kwargs={"file_id": self.object.id, "popup": self.kwargs.get("popup", "")},
)
def get_context_data(self, **kwargs):
kwargs = super(FileEditPropView, self).get_context_data(**kwargs)
kwargs["popup"] = ""
if self.kwargs.get("popup") is not None:
kwargs["popup"] = "popup"
return kwargs
class FileView(CanViewMixin, DetailView, FormMixin):
"""This class handle the upload of new files into a folder"""
model = SithFile
pk_url_kwarg = "file_id"
template_name = "core/file_detail.jinja"
context_object_name = "file"
form_class = AddFilesForm
def handle_clipboard(request, object):
"""
This method handles the clipboard in the view.
This method can fail, since it does not catch the exceptions coming from
below, allowing proper handling in the calling view.
Use this method like this:
FileView.handle_clipboard(request, self.object)
`request` is usually the self.request object in your view
`object` is the SithFile object you want to put in the clipboard, or
where you want to paste the clipboard
"""
if "delete" in request.POST.keys():
for f_id in request.POST.getlist("file_list"):
sf = SithFile.objects.filter(id=f_id).first()
if sf:
sf.delete()
if "clear" in request.POST.keys():
request.session["clipboard"] = []
if "cut" in request.POST.keys():
for f_id in request.POST.getlist("file_list"):
f_id = int(f_id)
if (
f_id in [c.id for c in object.children.all()]
and f_id not in request.session["clipboard"]
):
request.session["clipboard"].append(f_id)
if "paste" in request.POST.keys():
for f_id in request.session["clipboard"]:
sf = SithFile.objects.filter(id=f_id).first()
if sf:
sf.move_to(object)
request.session["clipboard"] = []
request.session.modified = True
def get(self, request, *args, **kwargs):
self.form = self.get_form()
if not self.object.can_be_managed_by(request.user):
raise PermissionDenied
if "clipboard" not in request.session.keys():
request.session["clipboard"] = []
return super(FileView, self).get(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
self.object = self.get_object()
if "clipboard" not in request.session.keys():
request.session["clipboard"] = []
if request.user.can_edit(self.object):
# XXX this call can fail!
FileView.handle_clipboard(request, self.object)
self.form = self.get_form() # The form handle only the file upload
files = request.FILES.getlist("file_field")
if (
request.user.is_authenticated
and request.user.can_edit(self.object)
and self.form.is_valid()
):
self.form.process(parent=self.object, owner=request.user, files=files)
if self.form.is_valid():
return super(FileView, self).form_valid(self.form)
return self.form_invalid(self.form)
def get_success_url(self):
return reverse(
"core:file_detail",
kwargs={"file_id": self.object.id, "popup": self.kwargs.get("popup", "")},
)
def get_context_data(self, **kwargs):
kwargs = super(FileView, self).get_context_data(**kwargs)
kwargs["popup"] = ""
kwargs["form"] = self.form
if self.kwargs.get("popup") is not None:
kwargs["popup"] = "popup"
kwargs["clipboard"] = SithFile.objects.filter(
id__in=self.request.session["clipboard"]
)
return kwargs
class FileDeleteView(CanEditPropMixin, DeleteView):
model = SithFile
pk_url_kwarg = "file_id"
template_name = "core/file_delete_confirm.jinja"
context_object_name = "file"
def get(self, request, *args, **kwargs):
self.object = self.get_object()
if not self.object.can_be_managed_by(request.user):
raise PermissionDenied
return super(FileDeleteView, self).get(request, *args, **kwargs)
def get_success_url(self):
self.object.file.delete() # Doing it here or overloading delete() is the same, so let's do it here
if "next" in self.request.GET.keys():
return self.request.GET["next"]
if self.object.parent is None:
return reverse(
"core:file_list", kwargs={"popup": self.kwargs.get("popup", "")}
)
return reverse(
"core:file_detail",
kwargs={
"file_id": self.object.parent.id,
"popup": self.kwargs.get("popup", ""),
},
)
def get_context_data(self, **kwargs):
kwargs = super(FileDeleteView, self).get_context_data(**kwargs)
kwargs["popup"] = ""
if self.kwargs.get("popup") is not None:
kwargs["popup"] = "popup"
return kwargs
class FileModerationView(TemplateView):
template_name = "core/file_moderation.jinja"
def get_context_data(self, **kwargs):
kwargs = super(FileModerationView, self).get_context_data(**kwargs)
kwargs["files"] = SithFile.objects.filter(is_moderated=False)[:100]
return kwargs
class FileModerateView(CanEditPropMixin, SingleObjectMixin):
model = SithFile
pk_url_kwarg = "file_id"
def get(self, request, *args, **kwargs):
self.object = self.get_object()
self.object.is_moderated = True
self.object.moderator = request.user
self.object.save()
if "next" in self.request.GET.keys():
return redirect(self.request.GET["next"])
return redirect("core:file_moderation")