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/*
 * Copyright 2015 Canonical Ltd.
 * Copyright 2021 Robert Tari
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *      Ted Gould <ted@canonical.com>
 */

#include <algorithm>
#include <map>
#include <memory>
#include <type_traits>

#include <libdbustest/dbus-test.h>

class NotificationsMock
{
        DbusTestDbusMock * mock = nullptr;
        DbusTestDbusMockObject * baseobj = nullptr;

    public:
        NotificationsMock (const std::vector<std::string>& capabilities = {"actions", "body", "body-markup", "icon-static", "image/svg+xml", "x-canonical-private-synchronous", "x-canonical-append", "x-canonical-private-icon-only", "x-canonical-truncation", "private-synchronous", "append", "private-icon-only", "truncation"}) {
            mock = dbus_test_dbus_mock_new("org.freedesktop.Notifications");
            dbus_test_task_set_bus(DBUS_TEST_TASK(mock), DBUS_TEST_SERVICE_BUS_SESSION);
            dbus_test_task_set_name(DBUS_TEST_TASK(mock), "Notify");

            baseobj =dbus_test_dbus_mock_get_object(mock, "/org/freedesktop/Notifications", "org.freedesktop.Notifications", nullptr);

            std::string capspython("ret = ");
            capspython += vector2py(capabilities);
            dbus_test_dbus_mock_object_add_method(mock, baseobj,
                "GetCapabilities", nullptr, G_VARIANT_TYPE("as"),
                capspython.c_str(), nullptr);

            dbus_test_dbus_mock_object_add_method(mock, baseobj,
                "GetServerInformation", nullptr, G_VARIANT_TYPE("(ssss)"),
                "ret = ['notification-mock', 'Testing harness', '1.0', '1.1']", nullptr);

            dbus_test_dbus_mock_object_add_method(mock, baseobj,
                "Notify", G_VARIANT_TYPE("(susssasa{sv}i)"), G_VARIANT_TYPE("u"),
                "ret = 10", nullptr);

            dbus_test_dbus_mock_object_add_method(mock, baseobj,
                "CloseNotification", G_VARIANT_TYPE("u"), nullptr,
                "", nullptr);
        }

        ~NotificationsMock () {
            g_debug("Destroying the Notifications Mock");
            g_clear_object(&mock);
        }

        std::string vector2py (std::vector<std::string> vect) {
            std::string retval("[ ");

            std::for_each(vect.begin(), vect.end() - 1, [&retval](const std::string& entry) {
                retval += "'";
                retval += entry;
                retval += "', ";
            });

            retval += "'";
            retval += *(vect.end() - 1);
            retval += "']";

            return retval;
        }

        operator std::shared_ptr<DbusTestTask> () {
            std::shared_ptr<DbusTestTask> retval(DBUS_TEST_TASK(g_object_ref(mock)), [](DbusTestTask * task) { g_clear_object(&task); });
            return retval;
        }

        operator DbusTestTask* () {
            return DBUS_TEST_TASK(mock);
        }

        operator DbusTestDbusMock* () {
            return mock;
        }

        struct Notification {
            std::string app_name;
            unsigned int replace_id;
            std::string app_icon;
            std::string summary;
            std::string body;
            std::vector<std::string> actions;
            std::map<std::string, std::shared_ptr<GVariant>> hints;
            int timeout;
        };

        std::shared_ptr<GVariant> childGet (GVariant * tuple, gsize index) {
            return std::shared_ptr<GVariant>(g_variant_get_child_value(tuple, index),
                [](GVariant * v){ if (v != nullptr) g_variant_unref(v); });
        }

        std::vector<Notification> getNotifications (void) {
            std::vector<Notification> notifications;

            unsigned int cnt, i;
            auto calls = dbus_test_dbus_mock_object_get_method_calls(mock, baseobj, "Notify", &cnt, nullptr);

            for (i = 0; i < cnt; i++) {
                auto call = calls[i];
                Notification notification;

                notification.app_name = g_variant_get_string(childGet(call.params, 0).get(), nullptr);
                notification.replace_id = g_variant_get_uint32(childGet(call.params, 1).get());
                notification.app_icon = g_variant_get_string(childGet(call.params, 2).get(), nullptr);
                notification.summary = g_variant_get_string(childGet(call.params, 3).get(), nullptr);
                notification.body = g_variant_get_string(childGet(call.params, 4).get(), nullptr);
                notification.timeout = g_variant_get_int32(childGet(call.params, 7).get());

                auto vactions = childGet(call.params, 5);
                GVariantIter iactions = {0};
                g_variant_iter_init(&iactions, vactions.get());
                const gchar * action = nullptr;
                while (g_variant_iter_loop(&iactions, "&s", &action)) {
                    std::string saction(action);
                    notification.actions.push_back(saction);
                }

                auto vhints = childGet(call.params, 6);
                GVariantIter ihints = {0};
                g_variant_iter_init(&ihints, vhints.get());
                const gchar * hint_key = nullptr;
                GVariant * hint_value = nullptr;
                while (g_variant_iter_loop(&ihints, "{&sv}", &hint_key, &hint_value)) {
                    std::string key(hint_key);
                    std::shared_ptr<GVariant> value(g_variant_ref(hint_value), [](GVariant * v){ if (v != nullptr) g_variant_unref(v); });
                    notification.hints[key] = value;
                }

                notifications.push_back(notification);
            }

            return notifications;
        }

        bool clearNotifications (void) {
            return dbus_test_dbus_mock_object_clear_method_calls(mock, baseobj, nullptr);
        }
};