"""

A few bits of helper functions for comment views.

"""

import urllib

import textwrap

from django.http import HttpResponseRedirect

from django.core import urlresolvers

from django.shortcuts import render_to_response

from django.template import RequestContext

from django.core.exceptions import ObjectDoesNotExist

from django.contrib import comments

def next_redirect(data, default, default_view, **get_kwargs):

    """

    Handle the "where should I go next?" part of comment views.

    The next value could be a kwarg to the function (``default``), or a

    ``?next=...`` GET arg, or the URL of a given view (``default_view``). See

    the view modules for examples.

    Returns an ``HttpResponseRedirect``.

    """

    next = data.get("next", default)

    if next is None:

        next = urlresolvers.reverse(default_view)

    if get_kwargs:

        joiner = ('?' in next) and '&' or '?'

        next += joiner + urllib.urlencode(get_kwargs)

    return HttpResponseRedirect(next)

def confirmation_view(template, doc="Display a confirmation view."):

    """

    Confirmation view generator for the "comment was

    posted/flagged/deleted/approved" views.

    """

    def confirmed(request):

        comment = None

        if 'c' in request.GET:

            try:

                comment = comments.get_model().objects.get(pk=request.GET['c'])

            except (ObjectDoesNotExist, ValueError):

                pass

        return render_to_response(template,

            {'comment': comment},

            context_instance=RequestContext(request)

        )

    confirmed.__doc__ = textwrap.dedent("""\

        %s

        Templates: `%s``

        Context:

            comment

                The posted comment

        """ % (doc, template)

    )

    return confirmed