files.py 8.74 KB
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# This file contains all the views that concern the page model
from django.shortcuts import render, redirect, get_object_or_404
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from django.views.generic import ListView, DetailView, TemplateView
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from django.views.generic.edit import UpdateView, CreateView, FormMixin, DeleteView
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from django.views.generic.detail import SingleObjectMixin
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from django.contrib.auth.decorators import login_required, permission_required
from django.forms.models import modelform_factory
from django.forms import CheckboxSelectMultiple
from django.conf import settings
from django.utils.translation import ugettext as _
from django.http import HttpResponse
from django.core.servers.basehttp import FileWrapper
from django.core.urlresolvers import reverse
from django.core.exceptions import PermissionDenied, ObjectDoesNotExist
from django import forms

import os

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from core.models import SithFile, RealGroup, Notification
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from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin, CanCreateMixin, can_view, not_found

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def send_file(request, file_id, file_class=SithFile, file_attr="file"):
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    """
    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.
    """
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    f = file_class.objects.filter(id=file_id).first()
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    if f is None or not f.file:
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        return not_found(request)
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    from counter.models import Counter
    if not (can_view(f, request.user) or
            ('counter_token' in request.session.keys() and
                request.session['counter_token'] and # check if not null for counters that have no token set
                Counter.objects.filter(token=request.session['counter_token']).exists())
            ):
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        raise PermissionDenied
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    name = f.__getattribute__(file_attr).name
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    with open((settings.MEDIA_ROOT + name).encode('utf-8'), 'rb') as filename:
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        wrapper = FileWrapper(filename)
        response = HttpResponse(wrapper, content_type=f.mime_type)
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        response['Content-Length'] = os.path.getsize((settings.MEDIA_ROOT + name).encode('utf-8'))
        response['Content-Disposition'] = ('inline; filename="%s"' % f.name).encode('utf-8')
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        return response

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class AddFilesForm(forms.Form):
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    folder_name = forms.CharField(label=_("Add a new folder"), max_length=30, required=False)
    file_field = forms.FileField(widget=forms.ClearableFileInput(attrs={'multiple': True}), label=_("Files"),
            required=False)

    def process(self, parent, owner, files):
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        notif = False
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        try:
            if self.cleaned_data['folder_name'] != "":
                folder = SithFile(parent=parent, name=self.cleaned_data['folder_name'], owner=owner)
                folder.clean()
                folder.save()
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                notif = True
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        except Exception as e:
            self.add_error(None, _("Error creating folder %(folder_name)s: %(msg)s") %
                    {'folder_name': self.cleaned_data['folder_name'], 'msg': str(e.message)})
        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()
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                notif = True
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            except Exception as e:
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                self.add_error(None, _("Error uploading file %(file_name)s: %(msg)s") % {'file_name': f, 'msg': repr(e)})
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        if notif:
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            for u in RealGroup.objects.filter(id=settings.SITH_GROUP_SAS_ADMIN_ID).first().users.all():
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                if not u.notifications.filter(type="FILE_MODERATION").exists():
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                    Notification(user=u, url=reverse("core:file_moderation"), type="FILE_MODERATION").save()
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class FileListView(ListView):
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    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['popup']:
            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_form_class(self):
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        fields = ['name', 'is_moderated']
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        if self.object.is_file:
            fields = ['file'] + fields
        return modelform_factory(SithFile, fields=fields)

    def get_success_url(self):
        if self.kwargs['popup']:
            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['popup']:
            kwargs['popup'] = 'popup'
        return kwargs

class FileEditPropView(CanEditPropMixin, UpdateView):
    model = SithFile
    pk_url_kwarg = "file_id"
    template_name = 'core/file_edit.jinja'
    context_object_name = "file"
    fields = ['parent', 'owner', 'edit_groups', 'view_groups']

    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 get_success_url(self):
        return reverse('core:file_detail', kwargs={'file_id': self.object.id, 'popup': self.kwargs['popup'] or ""})

    def get_context_data(self, **kwargs):
        kwargs = super(FileEditPropView, self).get_context_data(**kwargs)
        kwargs['popup'] = ""
        if self.kwargs['popup']:
            kwargs['popup'] = 'popup'
        return kwargs

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class FileView(CanViewMixin, DetailView, FormMixin):
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    """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"
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    form_class = AddFilesForm
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    def get(self, request, *args, **kwargs):
        self.form = self.get_form()
        return super(FileView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        self.form = self.get_form()
        files = request.FILES.getlist('file_field')
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        if request.user.is_authenticated() and request.user.can_edit(self.object) and self.form.is_valid():
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            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['popup'] or ""})

    def get_context_data(self, **kwargs):
        kwargs = super(FileView, self).get_context_data(**kwargs)
        kwargs['popup'] = ""
        kwargs['form'] = self.form
        if self.kwargs['popup']:
            kwargs['popup'] = 'popup'
        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_success_url(self):
        self.object.file.delete() # Doing it here or overloading delete() is the same, so let's do it here
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        if 'next' in self.request.GET.keys():
            return self.request.GET['next']
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        if self.object.parent is None:
            return reverse('core:file_list', kwargs={'popup': self.kwargs['popup'] or ""})
        return reverse('core:file_detail', kwargs={'file_id': self.object.parent.id, 'popup': self.kwargs['popup'] or ""})

    def get_context_data(self, **kwargs):
        kwargs = super(FileDeleteView, self).get_context_data(**kwargs)
        kwargs['popup'] = ""
        if self.kwargs['popup']:
            kwargs['popup'] = 'popup'
        return kwargs

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class FileModerationView(TemplateView):
    template_name = "core/file_moderation.jinja"

    def get_context_data(self, **kwargs):
        kwargs = super(FileModerationView, self).get_context_data(**kwargs)
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        kwargs['files'] = SithFile.objects.filter(is_moderated=False)[:100]
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        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
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        self.object.moderator = request.user
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        self.object.save()
        if 'next' in self.request.GET.keys():
            return redirect(self.request.GET['next'])
        return redirect('core:file_moderation')