Example #1
0
def get_locale_from_request(request, session=None, user=None):
    if user is None:
        user_id = request.authenticated_userid or Everyone
        if user_id != Everyone:
            user = User.get(user_id)
    session = session or User.default_db
    if user:
        if '_LOCALE_' in request.params:
            locale = request.params['_LOCALE_']
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.Parameter)
        elif '_LOCALE_' in request.cookies:
            locale = request.cookies['_LOCALE_']
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.Cookie)
        else:
            # uses my locale negotiator
            locale = request.locale_name
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.OS_Default)
    else:
        locale = request.localizer.locale_name
    target_locale = Locale.get_or_create(
        strip_country(locale), session)
    return target_locale
Example #2
0
def base_admin_view(request):
    """The Base admin view, for frontend urls"""
    user_id = authenticated_userid(request) or Everyone
    if user_id == Everyone:
        raise HTTPUnauthorized()
    context = get_default_context(request)

    session = Discussion.default_db
    preferences = Preferences.get_default_preferences(session)
    user = User.get(user_id)

    if '_LOCALE_' in request.cookies:
        locale = request.cookies['_LOCALE_']
        process_locale(locale, user, session, LanguagePreferenceOrder.Cookie)

    elif '_LOCALE_' in request.params:
        locale = request.params['_LOCALE_']
        process_locale(locale, user, session,
                       LanguagePreferenceOrder.Parameter)
    else:
        locale = request.locale_name
        process_locale(locale, user, session,
                       LanguagePreferenceOrder.OS_Default)

    target_locale = strip_country(locale)
    locale_labels = json.dumps(
        DummyGoogleTranslationService.target_locale_labels_cls(target_locale))
    context['translation_locale_names_json'] = locale_labels

    role_names = [x for (x, ) in session.query(Role.name).all()]
    permission_names = [x for (x, ) in session.query(Permission.name).all()]
    context['role_names'] = json.dumps(role_names)
    context['permission_names'] = json.dumps(permission_names)
    context['discussion'] = PseudoDiscussion()

    response = render_to_response('../../templates/adminIndex.jinja2',
                                  context,
                                  request=request)
    # Prevent caching the home, especially for proper login/logout
    response.cache_control.max_age = 0
    response.cache_control.prevent_auto = True
    return response
Example #3
0
def get_locale_from_request(request, session=None, user=None):
    if user is None:
        user_id = request.authenticated_userid or Everyone
        if user_id != Everyone:
            user = User.get(user_id)
    session = session or User.default_db
    if user:
        if '_LOCALE_' in request.params:
            locale = request.params['_LOCALE_']
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.Parameter)
        elif '_LOCALE_' in request.cookies:
            locale = request.cookies['_LOCALE_']
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.Cookie)
        else:
            # uses my locale negotiator
            locale = request.locale_name
            process_locale(locale, user, session,
                           LanguagePreferenceOrder.OS_Default)
    else:
        locale = request.localizer.locale_name
    target_locale = Locale.get_or_create(strip_country(locale), session)
    return target_locale
Example #4
0
def general_permissions(request):
    user_id = authenticated_userid(request)
    assert user_id
    db = Discussion.default_db

    roles = db.query(Role).all()
    roles_by_name = {r.name: r for r in roles}
    role_names = [r.name for r in roles]
    role_names.sort()
    permissions = db.query(Permission).all()
    permission_names = [p.name for p in permissions]
    permission_names.sort()

    user_roles = db.query(UserRole).join(Role, User).all()
    user_roles_as_set = set(
        (lur.user.id, lur.role.name) for lur in user_roles)
    user_roles_dict = {
        (lur.user.id, lur.role.name): lur for lur in user_roles}
    users = set(lur.user for lur in user_roles)

    if request.POST:
        if 'submit_user_roles' in request.POST:
            user_ids = {u.id for u in users}
            for role in role_names:
                if role == Everyone:
                    continue
                prefix = 'has_'+role+'_'
                for name in request.POST:
                    if name.startswith(prefix):
                        a_user_id = int(name[len(prefix):])
                        if a_user_id not in user_ids:
                            users.add(User.get_instance(a_user_id))
                            user_ids.add(a_user_id)
                for user in users:
                    has_role_text = 'has_%s_%d' % (role, user.id)
                    if (user.id, role) not in user_roles_as_set and \
                            has_role_text in request.POST:
                        ur = UserRole(
                            role=roles_by_name[role],
                            user=user)
                        user_roles.append(ur)
                        user_roles_dict[(user.id, role)] = ur
                        user_roles_as_set.add((user.id, role))
                        db.add(ur)
                    elif (user.id, role) in user_roles_as_set and \
                            has_role_text not in request.POST:
                        ur = user_roles_dict[(user.id, role)]
                        del user_roles_dict[(user.id, role)]
                        user_roles_as_set.remove((user.id, role))
                        user_roles.remove(ur)
                        db.delete(ur)

        elif 'submit_look_for_user' in request.POST:
            search_string = '%' + request.POST['user_search'] + '%'
            other_users = db.query(User).outerjoin(Username).filter(
                AgentProfile.name.ilike(search_string)
                | Username.username.ilike(search_string)
                | User.preferred_email.ilike(search_string)).all()
            users.update(other_users)

    def has_role(user_id, role):
        return (user_id, role) in user_roles_as_set

    users = list(users)
    users.sort(key=order_by_domain_and_name)

    context = dict(
        get_default_context(request),
        roles=role_names,
        permissions=permission_names,
        users=users,
        has_role=has_role,
        is_system_role=lambda r: r in SYSTEM_ROLES
    )

    return render_to_response(
        'admin/global_permissions.jinja2',
        context,
        request=request)
Example #5
0
def discussion_permissions(request):
    user_id = authenticated_userid(request)
    assert user_id
    db = Discussion.default_db
    discussion_id = int(request.matchdict['discussion_id'])
    discussion = Discussion.get_instance(discussion_id)
    error = ''

    if not discussion:
        raise HTTPNotFound("Discussion with id '%d' not found." % (
            discussion_id,))

    roles = db.query(Role).all()
    roles_by_name = {r.name: r for r in roles}
    role_names = [r.name for r in roles]
    role_names.sort()
    permissions = db.query(Permission).all()
    perms_by_name = {p.name: p for p in permissions}
    permission_names = [p.name for p in permissions]
    permission_names.sort()

    disc_perms = db.query(DiscussionPermission).filter_by(
        discussion_id=discussion_id).join(Role, Permission).all()
    disc_perms_as_set = set((dp.role.name, dp.permission.name)
                            for dp in disc_perms)
    disc_perms_dict = {(dp.role.name, dp.permission.name): dp
                       for dp in disc_perms}
    local_roles = db.query(LocalUserRole).filter_by(
        discussion_id=discussion_id).join(Role, User).all()
    local_roles_as_set = set((lur.user.id, lur.role.name)
                             for lur in local_roles)
    local_roles_dict = {(lur.user.id, lur.role.name): lur
                        for lur in local_roles}
    users = set(lur.user for lur in local_roles)
    num_users = ''

    if request.POST:
        if 'submit_role_permissions' in request.POST:
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                for permission in permission_names:
                    allowed_text = 'allowed_%s_%s' % (role, permission)
                    if (role, permission) not in disc_perms_as_set and \
                            allowed_text in request.POST:
                        dp = DiscussionPermission(
                            role=roles_by_name[role],
                            permission=perms_by_name[permission],
                            discussion_id=discussion_id)
                        disc_perms_dict[(role, permission)] = dp
                        disc_perms_as_set.add((role, permission))
                        db.add(dp)
                    elif (role, permission) in disc_perms_as_set and \
                            allowed_text not in request.POST:
                        dp = disc_perms_dict[(role, permission)]
                        del disc_perms_dict[(role, permission)]
                        disc_perms_as_set.remove((role, permission))
                        db.delete(dp)
                if not role in SYSTEM_ROLES and\
                        'delete_'+role in request.POST:
                    db.delete(roles_by_name[role])
                    del roles_by_name[role]
                    role_names.remove(role)
        elif 'submit_add_role' in request.POST:
            #TODO: Sanitize role
            role = Role(name='r:'+request.POST['new_role'])
            roles_by_name[role.name] = role
            role_names.append(role.name)
            db.add(role)
        elif 'submit_user_roles' in request.POST:
            user_ids = {u.id for u in users}
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                prefix = 'has_'+role+'_'
                for name in request.POST:
                    if name.startswith(prefix):
                        a_user_id = int(name[len(prefix):])
                        if a_user_id not in user_ids:
                            users.add(User.get_instance(a_user_id))
                            user_ids.add(a_user_id)
                for user in users:
                    has_role_text = 'has_%s_%d' % (role, user.id)
                    if (user.id, role) not in local_roles_as_set and \
                            has_role_text in request.POST:
                        lur = LocalUserRole(
                            role=roles_by_name[role],
                            user=user,
                            discussion_id=discussion_id)
                        local_roles.append(lur)

                        # TODO revisit this if Roles and Subscription are
                        # de-coupled
                        if role == 'r:participant':
                            user.update_agent_status_subscribe(discussion)

                        local_roles_dict[(user.id, role)] = lur
                        local_roles_as_set.add((user.id, role))
                        db.add(lur)
                    elif (user.id, role) in local_roles_as_set and \
                            has_role_text not in request.POST:
                        lur = local_roles_dict[(user.id, role)]
                        del local_roles_dict[(user.id, role)]
                        local_roles_as_set.remove((user.id, role))
                        local_roles.remove(lur)

                        # TODO revisit this if Roles and Subscription are
                        # de-coupled
                        if role == 'r:participant':
                            user.update_agent_status_unsubscribe(discussion)

                        db.delete(lur)

        elif 'submit_look_for_user' in request.POST:
            search_string = '%' + request.POST['user_search'] + '%'
            other_users = db.query(User).outerjoin(Username).filter(
                AgentProfile.name.ilike(search_string)
                | Username.username.ilike(search_string)
                | User.preferred_email.ilike(search_string)).all()
            users.update(other_users)
        elif 'submit_user_file' in request.POST:
            role = request.POST['add_with_role'] or R_PARTICIPANT
            if role == R_SYSADMIN and not user_has_permission(
                    discussion_id, user_id, P_SYSADMIN):
                role = R_ADMINISTRATOR
            if 'user_csvfile' in request.POST:
                try:
                    num_users = add_multiple_users_csv(
                        request, request.POST['user_csvfile'].file,
                        discussion_id, role,
                        request.POST.get('send_invite', False),
                        request.POST['email_subject'],
                        request.POST['text_email_message'],
                        request.POST['html_email_message'],
                        request.POST['sender_name'],
                        request.POST.get('resend_notloggedin', False))
                except Exception as e:
                    error = repr(e)
                    transaction.doom()
            else:
                error = request.localizer.translate(_('No file given.'))

    def allowed(role, permission):
        if role == R_SYSADMIN:
            return True
        return (role, permission) in disc_perms_as_set

    def has_local_role(user_id, role):
        return (user_id, role) in local_roles_as_set

    users = list(users)
    users.sort(key=order_by_domain_and_name)

    context = dict(
        get_default_context(request),
        discussion=discussion,
        allowed=allowed,
        roles=role_names,
        permissions=permission_names,
        users=users,
        error=error,
        num_users=num_users,
        has_local_role=has_local_role,
        is_system_role=lambda r: r in SYSTEM_ROLES
    )

    return render_to_response(
        'admin/discussion_permissions.jinja2',
        context,
        request=request)
Example #6
0
def general_permissions(request):
    user_id = authenticated_userid(request)
    assert user_id
    db = Discussion.default_db

    roles = db.query(Role).all()
    roles_by_name = {r.name: r for r in roles}
    role_names = [r.name for r in roles]
    role_names.sort()
    permissions = db.query(Permission).all()
    permission_names = [p.name for p in permissions]
    permission_names.sort()

    user_roles = db.query(UserRole).join(Role, User).all()
    user_roles_as_set = set((lur.user.id, lur.role.name) for lur in user_roles)
    user_roles_dict = {(lur.user.id, lur.role.name): lur for lur in user_roles}
    users = set(lur.user for lur in user_roles)

    if request.POST:
        if 'submit_user_roles' in request.POST:
            user_ids = {u.id for u in users}
            for role in role_names:
                if role == Everyone:
                    continue
                prefix = 'has_' + role + '_'
                for name in request.POST:
                    if name.startswith(prefix):
                        a_user_id = int(name[len(prefix):])
                        if a_user_id not in user_ids:
                            users.add(User.get_instance(a_user_id))
                            user_ids.add(a_user_id)
                for user in users:
                    has_role_text = 'has_%s_%d' % (role, user.id)
                    if (user.id, role) not in user_roles_as_set and \
                            has_role_text in request.POST:
                        ur = UserRole(role=roles_by_name[role], user=user)
                        user_roles.append(ur)
                        user_roles_dict[(user.id, role)] = ur
                        user_roles_as_set.add((user.id, role))
                        db.add(ur)
                    elif (user.id, role) in user_roles_as_set and \
                            has_role_text not in request.POST:
                        ur = user_roles_dict[(user.id, role)]
                        del user_roles_dict[(user.id, role)]
                        user_roles_as_set.remove((user.id, role))
                        user_roles.remove(ur)
                        db.delete(ur)

        elif 'submit_look_for_user' in request.POST:
            search_string = '%' + request.POST['user_search'] + '%'
            other_users = db.query(User).outerjoin(Username).filter(
                AgentProfile.name.ilike(search_string)
                | Username.username.ilike(search_string)
                | User.preferred_email.ilike(search_string)).all()
            users.update(other_users)

    def has_role(user_id, role):
        return (user_id, role) in user_roles_as_set

    users = list(users)
    users.sort(key=order_by_domain_and_name)

    context = dict(get_default_context(request),
                   roles=role_names,
                   permissions=permission_names,
                   users=users,
                   has_role=has_role,
                   is_system_role=lambda r: r in SYSTEM_ROLES)

    return render_to_response('admin/global_permissions.jinja2',
                              context,
                              request=request)
Example #7
0
def discussion_permissions(request):
    user_id = authenticated_userid(request)
    assert user_id
    db = Discussion.default_db
    discussion_id = int(request.matchdict['discussion_id'])
    discussion = Discussion.get_instance(discussion_id)
    error = ''

    if not discussion:
        raise HTTPNotFound("Discussion with id '%d' not found." %
                           (discussion_id, ))

    roles = db.query(Role).all()
    roles_by_name = {r.name: r for r in roles}
    role_names = [r.name for r in roles]
    role_names.sort()
    permissions = db.query(Permission).all()
    perms_by_name = {p.name: p for p in permissions}
    permission_names = [p.name for p in permissions]
    permission_names.sort()

    disc_perms = db.query(DiscussionPermission).filter_by(
        discussion_id=discussion_id).join(Role, Permission).all()
    disc_perms_as_set = set(
        (dp.role.name, dp.permission.name) for dp in disc_perms)
    disc_perms_dict = {(dp.role.name, dp.permission.name): dp
                       for dp in disc_perms}
    local_roles = db.query(LocalUserRole).filter_by(
        discussion_id=discussion_id).join(Role, User).all()
    local_roles_as_set = set(
        (lur.user.id, lur.role.name) for lur in local_roles)
    local_roles_dict = {(lur.user.id, lur.role.name): lur
                        for lur in local_roles}
    users = set(lur.user for lur in local_roles)
    num_users = ''

    if request.POST:
        if 'submit_role_permissions' in request.POST:
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                for permission in permission_names:
                    allowed_text = 'allowed_%s_%s' % (role, permission)
                    if (role, permission) not in disc_perms_as_set and \
                            allowed_text in request.POST:
                        dp = DiscussionPermission(
                            role=roles_by_name[role],
                            permission=perms_by_name[permission],
                            discussion_id=discussion_id)
                        disc_perms_dict[(role, permission)] = dp
                        disc_perms_as_set.add((role, permission))
                        db.add(dp)
                    elif (role, permission) in disc_perms_as_set and \
                            allowed_text not in request.POST:
                        dp = disc_perms_dict[(role, permission)]
                        del disc_perms_dict[(role, permission)]
                        disc_perms_as_set.remove((role, permission))
                        db.delete(dp)
                if not role in SYSTEM_ROLES and\
                        'delete_'+role in request.POST:
                    db.delete(roles_by_name[role])
                    del roles_by_name[role]
                    role_names.remove(role)
        elif 'submit_add_role' in request.POST:
            #TODO: Sanitize role
            role = Role(name='r:' + request.POST['new_role'])
            roles_by_name[role.name] = role
            role_names.append(role.name)
            db.add(role)
        elif 'submit_user_roles' in request.POST:
            user_ids = {u.id for u in users}
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                prefix = 'has_' + role + '_'
                for name in request.POST:
                    if name.startswith(prefix):
                        a_user_id = int(name[len(prefix):])
                        if a_user_id not in user_ids:
                            users.add(User.get_instance(a_user_id))
                            user_ids.add(a_user_id)
                for user in users:
                    has_role_text = 'has_%s_%d' % (role, user.id)
                    if (user.id, role) not in local_roles_as_set and \
                            has_role_text in request.POST:
                        lur = LocalUserRole(role=roles_by_name[role],
                                            user=user,
                                            discussion_id=discussion_id)
                        local_roles.append(lur)

                        # TODO revisit this if Roles and Subscription are
                        # de-coupled
                        if role == 'r:participant':
                            user.update_agent_status_subscribe(discussion)

                        local_roles_dict[(user.id, role)] = lur
                        local_roles_as_set.add((user.id, role))
                        db.add(lur)
                    elif (user.id, role) in local_roles_as_set and \
                            has_role_text not in request.POST:
                        lur = local_roles_dict[(user.id, role)]
                        del local_roles_dict[(user.id, role)]
                        local_roles_as_set.remove((user.id, role))
                        local_roles.remove(lur)

                        # TODO revisit this if Roles and Subscription are
                        # de-coupled
                        if role == 'r:participant':
                            user.update_agent_status_unsubscribe(discussion)

                        db.delete(lur)

        elif 'submit_look_for_user' in request.POST:
            search_string = '%' + request.POST['user_search'] + '%'
            other_users = db.query(User).outerjoin(Username).filter(
                AgentProfile.name.ilike(search_string)
                | Username.username.ilike(search_string)
                | User.preferred_email.ilike(search_string)).all()
            users.update(other_users)
        elif 'submit_user_file' in request.POST:
            role = request.POST['add_with_role'] or R_PARTICIPANT
            if role == R_SYSADMIN and not user_has_permission(
                    discussion_id, user_id, P_SYSADMIN):
                role = R_ADMINISTRATOR
            if 'user_csvfile' in request.POST:
                try:
                    num_users = add_multiple_users_csv(
                        request, request.POST['user_csvfile'].file,
                        discussion_id, role,
                        request.POST.get('send_invite',
                                         False), request.POST['email_subject'],
                        request.POST['text_email_message'],
                        request.POST['html_email_message'],
                        request.POST['sender_name'],
                        request.POST.get('resend_notloggedin', False))
                except Exception as e:
                    error = repr(e)
                    transaction.doom()
            else:
                error = request.localizer.translate(_('No file given.'))

    def allowed(role, permission):
        if role == R_SYSADMIN:
            return True
        return (role, permission) in disc_perms_as_set

    def has_local_role(user_id, role):
        return (user_id, role) in local_roles_as_set

    users = list(users)
    users.sort(key=order_by_domain_and_name)

    context = dict(get_default_context(request),
                   discussion=discussion,
                   allowed=allowed,
                   roles=role_names,
                   permissions=permission_names,
                   users=users,
                   error=error,
                   num_users=num_users,
                   has_local_role=has_local_role,
                   is_system_role=lambda r: r in SYSTEM_ROLES)

    return render_to_response('admin/discussion_permissions.jinja2',
                              context,
                              request=request)
Example #8
0
def discussion_permissions(request):
    user_id = authenticated_userid(request)
    assert user_id
    db = Discussion.default_db
    discussion_id = int(request.matchdict["discussion_id"])
    discussion = Discussion.get_instance(discussion_id)
    error = ""

    if not discussion:
        raise HTTPNotFound("Discussion with id '%d' not found." % (discussion_id,))

    roles = db.query(Role).all()
    roles_by_name = {r.name: r for r in roles}
    role_names = [r.name for r in roles]
    permissions = db.query(Permission).all()
    perms_by_name = {p.name: p for p in permissions}
    permission_names = [p.name for p in permissions]

    disc_perms = db.query(DiscussionPermission).filter_by(discussion_id=discussion_id).join(Role, Permission).all()
    disc_perms_as_set = set((dp.role.name, dp.permission.name) for dp in disc_perms)
    disc_perms_dict = {(dp.role.name, dp.permission.name): dp for dp in disc_perms}
    local_roles = db.query(LocalUserRole).filter_by(discussion_id=discussion_id).join(Role, User).all()
    local_roles_as_set = set((lur.user.id, lur.role.name) for lur in local_roles)
    local_roles_dict = {(lur.user.id, lur.role.name): lur for lur in local_roles}
    users = set(lur.user for lur in local_roles)
    num_users = ""

    if request.POST:
        if "submit_role_permissions" in request.POST:
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                for permission in permission_names:
                    allowed_text = "allowed_%s_%s" % (role, permission)
                    if (role, permission) not in disc_perms_as_set and allowed_text in request.POST:
                        dp = DiscussionPermission(
                            role=roles_by_name[role], permission=perms_by_name[permission], discussion_id=discussion_id
                        )
                        disc_perms_dict[(role, permission)] = dp
                        disc_perms_as_set.add((role, permission))
                        db.add(dp)
                    elif (role, permission) in disc_perms_as_set and allowed_text not in request.POST:
                        dp = disc_perms_dict[(role, permission)]
                        del disc_perms_dict[(role, permission)]
                        disc_perms_as_set.remove((role, permission))
                        db.delete(dp)
                if not role in SYSTEM_ROLES and "delete_" + role in request.POST:
                    db.delete(roles_by_name[role])
                    del roles_by_name[role]
                    role_names.remove(role)
        elif "submit_add_role" in request.POST:
            # TODO: Sanitize role
            role = Role(name="r:" + request.POST["new_role"])
            roles_by_name[role.name] = role
            role_names.append(role.name)
            db.add(role)
        elif "submit_user_roles" in request.POST:
            user_ids = {u.id for u in users}
            for role in role_names:
                if role == R_SYSADMIN:
                    continue
                prefix = "has_" + role + "_"
                for name in request.POST:
                    if name.startswith(prefix):
                        a_user_id = int(name[len(prefix) :])
                        if a_user_id not in user_ids:
                            users.add(User.get_instance(a_user_id))
                            user_ids.add(a_user_id)
                for user in users:
                    has_role_text = "has_%s_%d" % (role, user.id)
                    if (user.id, role) not in local_roles_as_set and has_role_text in request.POST:
                        lur = LocalUserRole(role=roles_by_name[role], user=user, discussion_id=discussion_id)
                        local_roles.append(lur)
                        local_roles_dict[(user.id, role)] = lur
                        local_roles_as_set.add((user.id, role))
                        db.add(lur)
                    elif (user.id, role) in local_roles_as_set and has_role_text not in request.POST:
                        lur = local_roles_dict[(user.id, role)]
                        del local_roles_dict[(user.id, role)]
                        local_roles_as_set.remove((user.id, role))
                        local_roles.remove(lur)
                        db.delete(lur)

        elif "submit_look_for_user" in request.POST:
            search_string = "%" + request.POST["user_search"] + "%"
            other_users = (
                db.query(User)
                .outerjoin(Username)
                .filter(
                    AgentProfile.name.ilike(search_string)
                    | Username.username.ilike(search_string)
                    | User.preferred_email.ilike(search_string)
                )
                .all()
            )
            users.update(other_users)
        elif "submit_user_file" in request.POST:
            role = request.POST["add_with_role"] or R_PARTICIPANT
            if role == R_SYSADMIN and not user_has_permission(discussion_id, user_id, P_SYSADMIN):
                role = R_ADMINISTRATOR
            if "user_csvfile" in request.POST:
                try:
                    num_users = add_multiple_users_csv(request.POST["user_csvfile"].file, discussion_id, role)
                except Exception as e:
                    error = repr(e)
            else:
                error = request.localizer.translate(_("No file given."))

    def allowed(role, permission):
        if role == R_SYSADMIN:
            return True
        return (role, permission) in disc_perms_as_set

    def has_local_role(user_id, role):
        return (user_id, role) in local_roles_as_set

    context = dict(
        get_default_context(request),
        discussion=discussion,
        allowed=allowed,
        roles=role_names,
        permissions=permission_names,
        users=users,
        error=error,
        num_users=num_users,
        has_local_role=has_local_role,
        is_system_role=lambda r: r in SYSTEM_ROLES,
    )

    return render_to_response("admin/discussion_permissions.jinja2", context, request=request)