/
views.py
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/
views.py
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from diff_match_patch import diff_match_patch
from django.contrib import messages
from django.core.exceptions import PermissionDenied
from django.core.urlresolvers import reverse
from django.http import HttpResponse, HttpResponseRedirect, HttpResponseNotFound
from django.shortcuts import get_object_or_404
from django.template import RequestContext, loader
from django.template.response import TemplateResponse
from django.utils.translation import ugettext as _
from django.utils.safestring import mark_safe
from urllib import urlencode, quote
from . import models, forms, utils
def view(request, title, revision_pk=None):
url_title = utils.urlize_title(title)
if title != url_title:
if revision_pk:
return HttpResponseRedirect(reverse('djiki-page-revision',
kwargs={'title': url_title, 'revision_pk': revision_pk}))
return HttpResponseRedirect(reverse('djiki-page-view', kwargs={'title': url_title}))
page_title = utils.deurlize_title(title)
auth = utils.get_auth_backend()
try:
page = models.Page.objects.get(title=page_title)
except models.Page.DoesNotExist:
t = loader.get_template('djiki/not_found.html')
c = RequestContext(request, {'title': page_title})
return HttpResponseNotFound(t.render(c))
if not auth.can_view(request, page):
raise PermissionDenied
if revision_pk:
if not auth.can_view_history(request, page):
raise PermissionDenied
try:
revision = page.revisions.get(pk=revision_pk)
except models.PageRevision.DoesNotExist:
return HttpResponseNotFound()
messages.info(request, mark_safe(_("The version you are viewing is not the latest one, "
"but represents an older revision of this page, which may have been "
"significantly modified. If it is not what you intended to view, "
"<a href=\"%(url)s\">proceed to the latest version</a>.") % {
'url': reverse('djiki-page-view', kwargs={'title': url_title})}))
else:
revision = page.last_revision()
if request.REQUEST.get('raw', ''):
response = HttpResponse(mimetype='text/plain')
response['Content-Disposition'] = 'attachment; filename=%s.txt' % quote(title.encode('utf-8'))
response.write(revision.content)
return response
return TemplateResponse(request, 'djiki/view.html',
{'page': page, 'revision': revision})
def edit(request, title):
url_title = utils.urlize_title(title)
if title != url_title:
return HttpResponseRedirect(reverse('djiki-page-edit', kwargs={'title': url_title}))
page_title = utils.deurlize_title(title)
auth = utils.get_auth_backend()
try:
page = models.Page.objects.get(title=page_title)
last_content = page.last_revision().content
if not auth.can_edit(request, page):
raise PermissionDenied
except models.Page.DoesNotExist:
page = models.Page(title=page_title)
last_content = ''
if not auth.can_create(request, page):
raise PermissionDenied
revision = models.PageRevision(page=page,
author=request.user if request.user.is_authenticated() else None)
form = forms.PageEditForm(
data=request.POST or None, instance=revision, page=page,
initial={'content': last_content})
preview_content = None
if request.method == 'POST':
is_preview = request.POST.get('action') == 'preview'
if form.is_valid():
if is_preview:
preview_content = form.cleaned_data.get('content', form.data['content'])
messages.info(request, mark_safe(_("The content you see on this page is shown only as "
"a preview. <strong>No changes have been saved yet.</strong> Please "
"review the modifications and use the <em>Save</em> button to store "
"them permanently.")))
else:
form.save()
return HttpResponseRedirect(
reverse('djiki-page-view', kwargs={'title': url_title}))
return TemplateResponse(request, 'djiki/edit.html',
{'form': form, 'page': page, 'preview_content': preview_content})
def history(request, title):
url_title = utils.urlize_title(title)
if title != url_title:
return HttpResponseRedirect(reverse('djiki-page-history', kwargs={'title': url_title}))
page_title = utils.deurlize_title(title)
page = get_object_or_404(models.Page, title=page_title)
auth = utils.get_auth_backend()
if not auth.can_view_history(request, page):
raise PermissionDenied
history = page.revisions.order_by('-created')
return TemplateResponse(request, 'djiki/history.html', {'page': page, 'history': history})
def diff(request, title):
url_title = utils.urlize_title(title)
if title != url_title:
return HttpResponseNotFound()
page_title = utils.deurlize_title(title)
page = get_object_or_404(models.Page, title=page_title)
auth = utils.get_auth_backend()
if not auth.can_view_history(request, page):
raise PermissionDenied
try:
from_rev = page.revisions.get(pk=request.REQUEST['from_revision_pk'])
to_rev = page.revisions.get(pk=request.REQUEST['to_revision_pk'])
except (KeyError, models.Page.DoesNotExist):
return HttpResponseNotFound()
dmp = diff_match_patch()
diff = dmp.diff_compute(from_rev.content, to_rev.content, True, 2)
return TemplateResponse(request, 'djiki/diff.html',
{'page': page, 'from_revision': from_rev, 'to_revision': to_rev, 'diff': diff})
def revert(request, title, revision_pk):
if not allow_anonymous_edits() and not request.user.is_authenticated():
raise PermissionDenied
url_title = utils.urlize_title(title)
if title != url_title:
return HttpResponseRedirect(
reverse('djiki-page-revert', kwargs={'title': url_title, 'revision_pk': revision_pk}))
page_title = utils.deurlize_title(title)
page = get_object_or_404(models.Page, title=page_title)
auth = utils.get_auth_backend()
if not auth.can_edit(request, page):
raise PermissionDenied
src_revision = get_object_or_404(models.PageRevision, page=page, pk=revision_pk)
new_revision = models.PageRevision(page=page,
author=request.user if request.user.is_authenticated() else None)
if request.method == 'POST':
form = forms.PageEditForm(data=request.POST or None, instance=new_revision, page=page)
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('djiki-page-view', kwargs={'title': url_title}))
else:
if src_revision.author:
description = _("Reverted to revision of %(time)s by %(user)s.") % \
{'time': src_revision.created, 'user': src_revision.user.username}
else:
description = _("Reverted to anonymous revision of %(time)s.") % \
{'time': src_revision.created}
form = forms.PageEditForm(data=request.POST or None, instance=new_revision, page=page,
initial={'content': src_revision.content, 'description': description})
return TemplateResponse(request, 'djiki/edit.html',
{'page': page, 'form': form, 'src_revision': src_revision})
def undo(request, title, revision_pk):
url_title = utils.urlize_title(title)
if title != url_title:
return HttpResponseRedirect(
reverse('djiki-page-undo', kwargs={'title': url_title, 'revision_pk': revision_pk}))
page_title = utils.deurlize_title(title)
page = get_object_or_404(models.Page, title=page_title)
auth = utils.get_auth_backend()
if not auth.can_edit(request, page):
raise PermissionDenied
src_revision = get_object_or_404(models.PageRevision, page=page, pk=revision_pk)
new_revision = models.PageRevision(page=page,
author=request.user if request.user.is_authenticated() else None)
if request.method == 'POST':
form = forms.PageEditForm(data=request.POST or None, instance=new_revision, page=page)
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('djiki-page-view', kwargs={'title': url_title}))
else:
if src_revision.author:
description = _("Undid revision of %(time)s by %(user)s.") % \
{'time': src_revision.created, 'user': src_revision.user.username}
else:
description = _("Undid anonymous revision of %(time)s.") % {'time': src_revision.created}
try:
prev_revision = models.PageRevision.objects\
.filter(page=page, created__lt=src_revision.created)\
.order_by('-created')[0]
prev_content = prev_revision.content
except IndexError:
prev_content = ''
dmp = diff_match_patch()
rdiff = dmp.patch_make(src_revision.content, prev_content)
content, results = dmp.patch_apply(rdiff, page.last_revision().content)
if False in results:
messages.warning(request, _("It was impossible to automatically undo the change "
"you have selected. Perhaps the page has been modified too much in the "
"meantime. Review the following content comparison, which represents the "
"change you tried to undo, and apply the changes manually to the latest "
"revision."))
urldata = {'to_revision_pk': src_revision.pk}
if prev_revision:
urldata['from_revision_pk'] = prev_revision.pk
return HttpResponseRedirect("%s?%s" % (
reverse('djiki-page-diff', kwargs={'title': url_title}),
urlencode(urldata)))
form = forms.PageEditForm(data=request.POST or None, page=page,
initial={'content': content, 'description': description})
return TemplateResponse(request, 'djiki/edit.html', {'page': page, 'form': form})
def image_new(request):
auth = utils.get_auth_backend()
if not auth.can_create(request, models.Image()):
raise PermissionDenied
form = forms.NewImageUploadForm(data=request.POST or None, files=request.FILES or None)
if request.method == 'POST':
if form.is_valid():
form.save()
return HttpResponseRedirect(
reverse('djiki-image-view', kwargs={'name': form.instance.image.name}))
return TemplateResponse(request, 'djiki/image_edit.html', {'form': form})
def image_view(request, name):
url_name = utils.urlize_title(name)
if name != url_name:
return HttpResponseRedirect(reverse('djiki-image-view', kwargs={'name': url_name}))
image_name = utils.deurlize_title(name)
image = get_object_or_404(models.Image, name=image_name)
auth = utils.get_auth_backend()
if not auth.can_view(request, image):
raise PermissionDenied
return TemplateResponse(request, 'djiki/image_view.html', {'image': image})
def image_edit(request, name):
url_name = utils.urlize_title(name)
if name != url_name:
return HttpResponseRedirect(reverse('djiki-image-edit', kwargs={'name': url_name}))
image_name = utils.deurlize_title(name)
image = get_object_or_404(models.Image, name=image_name)
auth = utils.get_auth_backend()
if not auth.can_edit(request, image):
raise PermissionDenied
revision = models.ImageRevision(image=image,
author=request.user if request.user.is_authenticated() else None)
form = forms.ImageUploadForm(data=request.POST or None, files=request.FILES or None,
instance=revision, image=image)
if request.method == 'POST':
if form.is_valid():
form.save()
return HttpResponseRedirect(
reverse('djiki-image-view', kwargs={'name': url_name}))
return TemplateResponse(request, 'djiki/image_edit.html', {'form': form})
def image_history(request, name):
url_name = utils.urlize_title(name)
if name != url_name:
return HttpResponseRedirect(reverse('djiki-image-view', kwargs={'name': url_name}))
image_name = utils.deurlize_title(name)
image = get_object_or_404(models.Image, name=image_name)
auth = utils.get_auth_backend()
if not auth.can_view_history(request, image):
raise PermissionDenied
history = image.revisions.order_by('-created')
return TemplateResponse(request, 'djiki/image_history.html', {'image': image, 'history': history})