def form_valid(self, form):
        """Custom form validation to support email changing.

        If user is already authenticated and reaches this points, it's
        an email changing procedure. Validate that email is good and
        save it in the database.

        Otherwise continue with the default django-browserid verification.
        """
        if not self.request.user.is_authenticated():
            return super(BrowserIDVerify, self).form_valid(form)

        failure_url = urlparams(reverse('phonebook:profile_edit'), bid_login_failed=1)
        self.assertion = form.cleaned_data['assertion']
        self.audience = get_audience(self.request)
        result = verify(self.assertion, self.audience)
        if not result:
            messages.error(self.request, _('Authentication failed.'))
            return redirect(failure_url)

        email = result['email']

        if User.objects.filter(email=email).exists():
            messages.error(self.request, _('Email already exists in the database.'))
            return redirect('phonebook:logout')

        user = self.request.user
        user.email = email
        user.save()
        return redirect('phonebook:profile_view', user.username)

def change_primary_email(request, email_pk):
    """Change primary email address."""
    user = User.objects.get(pk=request.user.id)
    profile = user.userprofile
    alternate_emails = ExternalAccount.objects.filter(user=profile,
                                                      type=ExternalAccount.TYPE_EMAIL)

    # Only email owner can change primary email
    if not alternate_emails.filter(pk=email_pk).exists():
        raise Http404()

    alternate_email = alternate_emails.get(pk=email_pk)
    primary_email = user.email

    # Change primary email
    user.email = alternate_email.identifier

    # Turn primary email to alternate
    alternate_email.identifier = primary_email

    with transaction.atomic():
        user.save()
        alternate_email.save()

    return redirect('phonebook:profile_edit')

def invite(request):
    profile = request.user.userprofile
    invite_form = None
    vouch_form = None
    if profile.can_vouch:
        invite_form = forms.InviteForm(request.POST or None,
                                       instance=Invite(inviter=profile))
        vouch_form = forms.VouchForm(request.POST or None)

    if invite_form and vouch_form and invite_form.is_valid() and vouch_form.is_valid():
        invite_form.instance.reason = vouch_form.cleaned_data['description']
        invite = invite_form.save()
        invite.send(sender=profile, personal_message=invite_form.cleaned_data['message'])
        msg = _(u"%s has been invited to Mozillians. They'll receive an email "
                u"with instructions on how to join. You can "
                u"invite another Mozillian if you like.") % invite.recipient
        messages.success(request, msg)
        return redirect('phonebook:invite')

    return render(request, 'phonebook/invite.html',
                  {
                      'invite_form': invite_form,
                      'vouch_form': vouch_form,
                      'invites': profile.invites.all(),
                      'vouch_threshold': settings.CAN_VOUCH_THRESHOLD,
                  })

def edit_profile(request):
    """Edit user profile view."""
    # Don't user request.user
    user = User.objects.get(pk=request.user.id)
    profile = user.userprofile
    user_groups = stringify_groups(profile.groups.all().order_by('name'))
    user_skills = stringify_groups(profile.skills.all().order_by('name'))
    user_languages = stringify_groups(profile.languages.all().order_by('name'))

    user_form = forms.UserForm(request.POST or None, instance=user)
    AccountsFormset = inlineformset_factory(UserProfile, ExternalAccount, extra=1)
    accounts_formset = AccountsFormset(request.POST or None, instance=profile)
    new_profile = False
    form = forms.ProfileForm
    if not profile.is_complete:
        new_profile = True
        form = forms.RegisterForm

    profile_form = form(request.POST or None, request.FILES or None,
                        instance=profile, locale=request.locale,
                        initial=dict(groups=user_groups, skills=user_skills,
                                     languages=user_languages))

    email_form = forms.EmailForm(request.POST or None,
                                 initial={'email': request.user.email,
                                          'user_id': request.user.id})

    if (user_form.is_valid() and profile_form.is_valid() and accounts_formset.is_valid() and
        email_form.is_valid()):
        old_username = request.user.username
        user_form.save()
        profile_form.save()
        accounts_formset.save()

        # Notify the user that their old profile URL won't work.
        if new_profile:
            update_invites(request)
            messages.info(request, _(u'Your account has been created.'))
        elif user.username != old_username:
            messages.info(request,
                          _(u'You changed your username; please note your '
                            'profile URL has also changed.'))

        if email_form.email_changed():
            return render(request, 'phonebook/verify_email.html',
                          {'email': email_form.cleaned_data['email']})
        return redirect('phonebook:profile_view', user.username)

    data = dict(profile_form=profile_form,
                user_form=user_form,
                accounts_formset = accounts_formset,
                email_form = email_form,
                user_groups=user_groups,
                my_vouches=UserProfile.objects.filter(vouched_by=profile),
                profile=request.user.userprofile,
                apps=user.apiapp_set.filter(is_active=True))

    # If there are form errors, don't send a 200 OK.
    status = 400 if (profile_form.errors or user_form.errors) else 200
    return render(request, 'phonebook/edit_profile.html', data, status=status)

def view_profile(request, username):
    """View a profile by username."""
    data = {}
    privacy_mappings = {'anonymous': PUBLIC, 'mozillian': MOZILLIANS, 'employee': EMPLOYEES,
                        'privileged': PRIVILEGED, 'myself': None}
    privacy_level = None

    if (request.user.is_authenticated() and request.user.username == username):
        # own profile
        view_as = request.GET.get('view_as', 'myself')
        privacy_level = privacy_mappings.get(view_as, None)
        profile = UserProfile.objects.privacy_level(privacy_level).get(user__username=username)
        data['privacy_mode'] = view_as
    else:
        userprofile_query = UserProfile.objects.filter(user__username=username)
        public_profile_exists = userprofile_query.public().exists()
        profile_exists = userprofile_query.exists()
        profile_complete = userprofile_query.exclude(full_name='').exists()

        if not public_profile_exists:
            if not request.user.is_authenticated():
                # you have to be authenticated to continue
                messages.warning(request, LOGIN_MESSAGE)
                return (login_required(view_profile, login_url=reverse('phonebook:home'))
                        (request, username))

            if not request.user.userprofile.is_vouched:
                # you have to be vouched to continue
                messages.error(request, GET_VOUCHED_MESSAGE)
                return redirect('phonebook:home')

        if not profile_exists or not profile_complete:
            raise Http404

        profile = UserProfile.objects.get(user__username=username)
        profile.set_instance_privacy_level(PUBLIC)
        if request.user.is_authenticated():
            profile.set_instance_privacy_level(
                request.user.userprofile.privacy_level)

        if (not profile.is_vouched
            and request.user.is_authenticated()
            and request.user.userprofile.is_vouched):
                data['vouch_form'] = (
                    forms.VouchForm(initial={'vouchee': profile.pk}))

    data['shown_user'] = profile.user
    data['profile'] = profile
    data['groups'] = profile.get_annotated_groups()
    data['locale'] = request.locale

    # Only show pending groups if user is looking at their own profile,
    # or current user is a superuser
    if not (request.user.is_authenticated()
            and (request.user.username == username or request.user.is_superuser)):
        data['groups'] = [grp for grp in data['groups'] if not grp.pending]

    return render(request, 'phonebook/profile.html', data)

def view_profile(request, username):
    """View a profile by username."""
    data = {}
    privacy_mappings = {
        "anonymous": PUBLIC,
        "mozillian": MOZILLIANS,
        "employee": EMPLOYEES,
        "privileged": PRIVILEGED,
        "myself": None,
    }
    privacy_level = None

    if request.user.is_authenticated() and request.user.username == username:
        # own profile
        view_as = request.GET.get("view_as", "myself")
        privacy_level = privacy_mappings.get(view_as, None)
        profile = UserProfile.objects.privacy_level(privacy_level).get(user__username=username)
        data["privacy_mode"] = view_as
    else:
        userprofile_query = UserProfile.objects.filter(user__username=username)
        public_profile_exists = userprofile_query.public().exists()
        profile_exists = userprofile_query.exists()
        profile_complete = userprofile_query.exclude(full_name="").exists()

        if not public_profile_exists:
            if not request.user.is_authenticated():
                # you have to be authenticated to continue
                messages.warning(request, LOGIN_MESSAGE)
                return login_required(view_profile, login_url=reverse("phonebook:home"))(request, username)

            if not request.user.userprofile.is_vouched:
                # you have to be vouched to continue
                messages.error(request, GET_VOUCHED_MESSAGE)
                return redirect("phonebook:home")

        if not profile_exists or not profile_complete:
            raise Http404

        profile = UserProfile.objects.get(user__username=username)
        profile.set_instance_privacy_level(PUBLIC)
        if request.user.is_authenticated():
            profile.set_instance_privacy_level(request.user.userprofile.privacy_level)

        if not profile.is_vouched and request.user.is_authenticated() and request.user.userprofile.is_vouched:
            data["vouch_form"] = forms.VouchForm(initial={"vouchee": profile.pk})

    data["shown_user"] = profile.user
    data["profile"] = profile
    data["groups"] = profile.get_annotated_groups()
    data["locale"] = request.locale

    # Only show pending groups if user is looking at their own profile,
    # or current user is a superuser
    if not (request.user.is_authenticated() and (request.user.username == username or request.user.is_superuser)):
        data["groups"] = [grp for grp in data["groups"] if not grp.pending]

    return render(request, "phonebook/profile.html", data)

def delete_invite(request, invite_pk):
    profile = request.user.userprofile
    deleted_invite = get_object_or_404(Invite, pk=invite_pk, inviter=profile, redeemed=None)
    deleted_invite.delete()

    msg = (_(u"%s's invitation to Mozillians has been revoked. "
             u"You can invite %s again if you like.") %
            (deleted_invite.recipient, deleted_invite.recipient))
    messages.success(request, msg)
    return redirect('phonebook:invite')

def delete_email(request, email_pk):
    """Delete alternate email address."""
    user = User.objects.get(pk=request.user.id)
    profile = user.userprofile

    # Only email owner can delete emails
    if not ExternalAccount.objects.filter(user=profile, pk=email_pk).exists():
        raise Http404()

    ExternalAccount.objects.get(pk=email_pk).delete()
    return redirect('phonebook:edit_emails')

def unvouch(request, username):
    """Automatically remove all vouches from username.

    This must be behind a waffle flag and activated only for testing
    purposes.

    """
    profile = get_object_or_404(UserProfile, user__username=username)
    profile.vouches_received.all().delete()
    messages.success(request, _('Successfully unvouched user.'))
    return redirect('phonebook:profile_view', profile.user.username)

    def process_request(self, request):
        user = request.user
        path = request.path

        if settings.DEBUG:
            self.allow_urls.append(settings.MEDIA_URL)

        if (user.is_authenticated() and not user.userprofile.is_complete and not
                filter(lambda url: re.match(url, path), self.allow_urls)):
            messages.warning(request, _('Please complete registration before proceeding.'))
            return redirect('phonebook:profile_edit')

def vouch(request, username):
    """Automatically vouch username.

    This must be behind a waffle flag and activated only for testing
    purposes.

    """
    profile = get_object_or_404(UserProfile, user__username=username)
    now = timezone.now()
    description = 'Automatically vouched for testing purposes on {0}'.format(now)
    profile.vouch(None, description=description, autovouch=True)
    messages.success(request, _('Successfully vouched user.'))
    return redirect('phonebook:profile_view', profile.user.username)

def vouch(request):
    """Vouch a user."""
    form = forms.VouchForm(request.POST)

    if form.is_valid():
        p = UserProfile.objects.get(pk=form.cleaned_data.get("vouchee"))
        p.vouch(request.user.userprofile)

        # Notify the current user that they vouched successfully.
        msg = _(u"Thanks for vouching for a fellow Mozillian! " u"This user is now vouched!")
        messages.info(request, msg)
        return redirect("phonebook:profile_view", p.user.username)

    return HttpResponseBadRequest()

def betasearch(request):
    """This view is for researching new search and data filtering
    options. It will eventually replace the 'search' view.

    This view is behind the 'betasearch' waffle flag.
    """
    limit = None
    people = []
    show_pagination = False
    form = forms.SearchForm(request.GET)
    groups = None
    functional_areas = None

    if form.is_valid():
        query = form.cleaned_data.get('q', u'')
        limit = form.cleaned_data['limit']
        include_non_vouched = form.cleaned_data['include_non_vouched']
        page = request.GET.get('page', 1)
        functional_areas = Group.get_functional_areas()
        public = not (request.user.is_authenticated()
                      and request.user.userprofile.is_vouched)

        profiles = UserProfile.search(query, public=public,
                                      include_non_vouched=include_non_vouched)
        if not public:
            groups = Group.search(query)

        paginator = Paginator(profiles, limit)

        try:
            people = paginator.page(page)
        except PageNotAnInteger:
            people = paginator.page(1)
        except EmptyPage:
            people = paginator.page(paginator.num_pages)

        if profiles.count() == 1 and not groups:
            return redirect('phonebook:profile_view', people[0].user.username)

        show_pagination = paginator.count > settings.ITEMS_PER_PAGE

    d = dict(people=people,
             search_form=form,
             limit=limit,
             show_pagination=show_pagination,
             groups=groups,
             functional_areas=functional_areas)

    return render(request, 'phonebook/betasearch.html', d)

def invite(request):
    profile = request.user.userprofile
    invite_form = forms.InviteForm(request.POST or None,
                                   instance=Invite(inviter=profile))
    if invite_form.is_valid():
        invite = invite_form.save()
        invite.send(sender=profile, personal_message=invite_form.cleaned_data['message'])
        msg = _(u"%s has been invited to Mozillians. They'll receive an email "
                u"with instructions on how to join. You can "
                u"invite another Mozillian if you like.") % invite.recipient
        messages.success(request, msg)
        return redirect('phonebook:home')

    return render(request, 'phonebook/invite.html',
                  {'invite_form': invite_form, 'invites': profile.invites.all()})

def invite(request):
    profile = request.user.userprofile
    invite_form = forms.InviteForm(request.POST or None,
                                   instance=Invite(inviter=profile))
    if request.method == 'POST' and invite_form.is_valid():
        invite = invite_form.save()
        invite.send(sender=profile)
        msg = _(u"%s has been invited to Mozillians. They'll receive an email "
                u"with instructions on how to join. You can "
                u"invite another Mozillian if you like." % invite.recipient)
        messages.success(request, msg)
        return redirect('phonebook:home')

    return render(request, 'phonebook/invite.html',
                  {'invite_form': invite_form})

def search(request):
    num_pages = 0
    limit = None
    people = []
    show_pagination = False
    form = forms.SearchForm(request.GET)
    groups = None
    curated_groups = None

    if form.is_valid():
        query = form.cleaned_data.get('q', u'')
        limit = form.cleaned_data['limit']
        include_non_vouched = form.cleaned_data['include_non_vouched']
        page = request.GET.get('page', 1)
        curated_groups = Group.get_curated()
        public = not (request.user.is_authenticated()
                      and request.user.userprofile.is_vouched)

        profiles = UserProfile.search(query, public=public,
                                      include_non_vouched=include_non_vouched)
        if not public:
            groups = Group.search(query)

        paginator = Paginator(profiles, limit)

        try:
            people = paginator.page(page)
        except PageNotAnInteger:
            people = paginator.page(1)
        except EmptyPage:
            people = paginator.page(paginator.num_pages)

        if profiles.count() == 1 and not groups:
            return redirect('phonebook:profile_view', people[0].user.username)

        show_pagination = paginator.count > settings.ITEMS_PER_PAGE

    d = dict(people=people,
             search_form=form,
             limit=limit,
             show_pagination=show_pagination,
             groups=groups,
             curated_groups=curated_groups)

    if request.is_ajax():
        return render(request, 'search_ajax.html', d)

    return render(request, 'phonebook/search.html', d)

    def process_request(self, request):
        user = request.user
        path = request.path
        allow_urls = [r'^/[\w-]+{0}'.format(reverse('phonebook:logout')),
                      r'^/[\w-]+{0}'.format(reverse('phonebook:profile_edit')),
                      r'^/browserid/',
                      r'^/[\w-]+{0}'.format(reverse('phonebook:login')),
                      r'^/[\w-]+/jsi18n/']

        if settings.DEBUG:
            allow_urls.append(settings.MEDIA_URL)

        if (user.is_authenticated() and not user.userprofile.is_complete
            and not filter(lambda url: re.match(url, path), allow_urls)):
            messages.warning(request, _('Please complete registration before proceeding.'))
            return redirect('phonebook:profile_edit')

def register(request):
    """Registers Users.

    Pulls out an invite code if it exists and auto validates the user
    if so. Single-purpose view.
    """
    # TODO already vouched users can be re-vouched?
    if 'code' in request.GET:
        request.session['invite-code'] = request.GET['code']
        if request.user.is_authenticated():
            if not request.user.userprofile.is_vouched:
                redeem_invite(request.user.userprofile, request.session['invite-code'])
        else:
            messages.info(request, _("You've been invited to join Mozillians.org! "
                                     "Sign in and then you can create a profile."))

    return redirect('phonebook:home')

def edit_emails(request):
    """Edit alternate email addresses."""
    user = User.objects.get(pk=request.user.id)
    profile = user.userprofile
    emails = ExternalAccount.objects.filter(type=ExternalAccount.TYPE_EMAIL)
    email_privacy_form = forms.EmailPrivacyForm(request.POST or None, instance=profile)
    alternate_email_formset = forms.AlternateEmailFormset(request.POST or None,
                                                          instance=profile,
                                                          queryset=emails)

    if alternate_email_formset.is_valid() and email_privacy_form.is_valid():
        alternate_email_formset.save()
        email_privacy_form.save()
        return redirect('phonebook:edit_emails')

    return render(request, 'phonebook/edit_emails.html',
                  {'alternate_email_formset': alternate_email_formset,
                   'email_privacy_form': email_privacy_form})

def search(request):
    limit = None
    people = []
    show_pagination = False
    form = forms.SearchForm(request.GET)
    groups = None
    functional_areas = None

    if form.is_valid():
        query = form.cleaned_data.get("q", u"")
        limit = form.cleaned_data["limit"]
        include_non_vouched = form.cleaned_data["include_non_vouched"]
        page = request.GET.get("page", 1)
        functional_areas = Group.get_functional_areas()
        public = not (request.user.is_authenticated() and request.user.userprofile.is_vouched)

        profiles = UserProfile.search(query, public=public, include_non_vouched=include_non_vouched)
        if not public:
            groups = Group.search(query)

        paginator = Paginator(profiles, limit)

        try:
            people = paginator.page(page)
        except PageNotAnInteger:
            people = paginator.page(1)
        except EmptyPage:
            people = paginator.page(paginator.num_pages)

        if profiles.count() == 1 and not groups:
            return redirect("phonebook:profile_view", people[0].user.username)

        show_pagination = paginator.count > settings.ITEMS_PER_PAGE

    d = dict(
        people=people,
        search_form=form,
        limit=limit,
        show_pagination=show_pagination,
        groups=groups,
        functional_areas=functional_areas,
    )

    return render(request, "phonebook/search.html", d)