def logout_page(request):
	logout(request)
	return HttpResponseRedirect('/')

def register_page(request):
	if request.method == 'POST':
		form = RegistrationForm(request.POST)
		if form.is_valid():
			user = User.objects.create_user(
				username=form.clean_data['username'],
				password=form.clean_data['password1'],
				email=form.clean_data['email']
			)
			return HttpResponseRedirect('/register/success/')
	else:
		form = RegistrationForm()
	variables = RequestContext(request, { 'form': form })
	return render_to_response('registration/register.html', variables)

def bookmark_save_page(request):
	if request.method == 'POST':
		form = BookmarkSaveForm(request.POST)
		if form.is_valid():
			# Get or create link
			link, dummy = Link.objects.get_or_create(
				url=form.clean_data['url']
			)
			# Get or create a bookmark
			bookmark, created = Bookmark.objects.get_or_create(
				user = request.user,
				link=link
			)
			# Update bookmark title
			bookmark.title = form.clean_data['title']
			# If the bookmark is being updated, clean old tag list.
			if not created:
				bookmark.tag_set.clear()
			# Create new tag list.
			tag_names = form.clean_data['tags'].split()
			for tag_name in tag_names:
				tag, dummy = Tag.objects.get_or_create(name=tag_name)
				bookmark.tag_set.add(tag)
			# Save bookmark to the database
			bookmark.save()
			return HttpResponseRedirect(
				'/user/%s/' % request.user.username
			)
		else:
			form = BookmarkSaveForm()
		variables = RequestContext(request, 'form': form)
		return render_to_response('bookmark_save.html', variables)