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/*
 * Copyright 2016 Canonical Ltd.
 * Copyright 2022 Robert Tari
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3, as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranties of
 * MERCHANTABILITY, SATISFACTORY QUALITY, 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:
 *   Charles Kerr <charles.kerr@canonical.com>
 *   Robert Tari <robert@tari.in>
 */

#include <tests/utils/adbd-server.h>
#include <tests/utils/qt-fixture.h>
#include <tests/utils/mock-greeter.h>
#include <tests/utils/mock-usb-monitor.h>

#include <src/dbus-names.h>
#include <src/usb-manager.h>

#include <libqtdbustest/DBusTestRunner.h>
#include <libqtdbustest/QProcessDBusService.h>
#include <libqtdbusmock/DBusMock.h>

#include <fstream>
#include <sstream>
#include <vector>

/***
****
***/

class UsbManagerFixture: public QtFixture
{
    using super = QtFixture;

public:

    UsbManagerFixture():
        dbusMock{dbusTestRunner}
    {
        dbusTestRunner.startServices();
    }

    ~UsbManagerFixture() =default;

protected:

    static void file_deleter (std::string* s)
    {
        fprintf(stderr, "remove \"%s\"\n", s->c_str());
        g_remove(s->c_str());
        delete s;
    }

    void SetUp() override
    {
        super::SetUp();

        m_usb_monitor.reset(new MockUsbMonitor{});
        m_greeter.reset(new MockGreeter{});

        char tmpl[] = {"usb-manager-test-XXXXXX"};
        m_tmpdir.reset(new std::string{g_mkdtemp(tmpl)}, file_deleter);
        g_message("using tmpdir '%s'", m_tmpdir->c_str());

        dbusMock.registerNotificationDaemon();
        dbusTestRunner.startServices();
    }

    OrgFreedesktopDBusMockInterface& notificationsMockInterface()
    {
        return dbusMock.mockInterface(DBusNames::Notify::NAME,
                                      DBusNames::Notify::PATH,
                                      DBusNames::Notify::INTERFACE,
                                      QDBusConnection::SessionBus);
    }

    QtDBusTest::DBusTestRunner dbusTestRunner;
    QtDBusMock::DBusMock dbusMock;
    std::shared_ptr<std::string> m_tmpdir;
    std::shared_ptr<MockUsbMonitor> m_usb_monitor;
    std::shared_ptr<MockGreeter> m_greeter;
};

TEST_F(UsbManagerFixture, Allow)
{
    const std::shared_ptr<std::string> socket_path {new std::string{*m_tmpdir+"/socket"}, file_deleter};
    const std::shared_ptr<std::string> public_keys_path {new std::string{*m_tmpdir+"/adb_keys"}, file_deleter};

    // add a signal spy to listen to the notification daemon
    QSignalSpy notificationsSpy(
        &notificationsMockInterface(),
        SIGNAL(MethodCalled(const QString &, const QVariantList &))
    );

    // start a mock AdbdServer ready to submit a request
    const std::string public_key {"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 foo@bar"};
    const std::string fingerprint {"12:23:5f:2d:8c:40:ae:1d:05:7b:ae:bd:88:8a:f0:80"};

    auto adbd_server = std::make_shared<GAdbdServer>(*socket_path, std::vector<std::string>{"PK"+public_key});

    // set up a UsbManager to process the request
    auto usb_manager = std::make_shared<UsbManager>(*socket_path, *public_keys_path, m_usb_monitor, m_greeter);
    // cppcheck in Ubuntu 20.04 requires the unused attribute to be set here...
    Q_UNUSED(usb_manager);

    // wait for the notification to show up, confirm it looks right
    wait_for_signals(notificationsSpy, 1);
    {
        QVariantList const& call(notificationsSpy.at(0));
        EXPECT_EQ("Notify", call.at(0));

        QVariantList const& args(call.at(1).toList());
        ASSERT_EQ(8, args.size());
        EXPECT_EQ("", args.at(0)); // app name
        EXPECT_EQ(0, args.at(1)); // replaces-id
        EXPECT_EQ("computer-symbolic", args.at(2)); // icon name
        EXPECT_EQ("Allow USB Debugging?", args.at(3)); // summary
        EXPECT_EQ(QString::fromUtf8("The computer's RSA key fingerprint is: ") + QString::fromUtf8(fingerprint.c_str()), args.at(4)); // body
        EXPECT_EQ(QStringList({"allow", "Allow", "deny", "Don't Allow"}), args.at(5)); // actions
        EXPECT_EQ(-1, args.at(7));

        QVariantMap hints;
        ASSERT_TRUE(qDBusArgumentToMap(args.at(6), hints));
        ASSERT_EQ(3, hints.size());
        ASSERT_TRUE(hints.contains("x-lomiri-private-affirmative-tint"));
        ASSERT_TRUE(hints.contains("x-lomiri-non-shaped-icon"));
        ASSERT_TRUE(hints.contains("x-lomiri-snap-decisions"));
    }
    notificationsSpy.clear();

    // click on allow in the notification
    notificationsMockInterface().EmitSignal(
        DBusNames::Notify::INTERFACE,
        DBusNames::Notify::ActionInvoked::NAME,
        "us",
        QVariantList() << uint32_t(1) << "allow"
    );

    // confirm that the AdbdServer got the right response
    wait_for([adbd_server](){return !adbd_server->m_responses.empty();}, 5000);
    ASSERT_EQ(1, adbd_server->m_responses.size());
    EXPECT_EQ("OK", adbd_server->m_responses.front());

    // confirm that the public_keys file got the public key appended to it
    std::ifstream ifkeys {*public_keys_path};
    std::vector<std::string> lines;
    std::string line;
    while(getline(ifkeys, line))
        lines.emplace_back(std::move(line));
    ASSERT_EQ(1, lines.size());
    EXPECT_EQ(public_key, lines[0]);
}

TEST_F(UsbManagerFixture, USBDisconnectedDuringPrompt)
{
    const std::shared_ptr<std::string> socket_path {new std::string{*m_tmpdir+"/socket"}, file_deleter};
    const std::shared_ptr<std::string> public_keys_path {new std::string{*m_tmpdir+"/adb_keys"}, file_deleter};

    // start a mock AdbdServer ready to submit a request
    const size_t N_TESTS {3};
    const std::string public_key {"public_key"};
    const std::vector<std::string> requests(N_TESTS, "PK"+public_key);
    const std::vector<std::string> expected_responses(N_TESTS, "NO");
    auto adbd_server = std::make_shared<GAdbdServer>(*socket_path, requests);

    // set up a UsbManager to process the request
    auto usb_manager = std::make_shared<UsbManager>(*socket_path, *public_keys_path, m_usb_monitor, m_greeter);
    // cppcheck in Ubuntu 20.04 requires the unused attribute to be set here...
    Q_UNUSED(usb_manager);

    for (std::remove_const<decltype(N_TESTS)>::type i=0; i<N_TESTS; ++i)
    {
        // add a signal spy to listen to the notification daemon
        QSignalSpy notificationsSpy(
            &notificationsMockInterface(),
            SIGNAL(MethodCalled(const QString &, const QVariantList &))
        );

        // wait for a notification to show up
        wait_for_signals(notificationsSpy, 1);
        EXPECT_EQ("Notify", notificationsSpy.at(0).at(0));
        notificationsSpy.clear();

        // wait for UsbSnap to receive dbusmock's response to the Notify request.
        // there's no event to key off of for this, so just wait for a moment
        wait_msec();

        // disconnect the USB before the user has a chance to allow/deny
        m_usb_monitor->m_on_usb_disconnected("android0");

        // confirm that we requested the notification to be pulled down
        wait_for_signals(notificationsSpy, 1);
        EXPECT_EQ("CloseNotification", notificationsSpy.at(0).at(0));
        notificationsSpy.clear();
    }

    EXPECT_TRUE(wait_for([adbd_server](){return adbd_server->m_responses.size() == N_TESTS;}, 5000));
    EXPECT_EQ(expected_responses, adbd_server->m_responses);
}

TEST_F(UsbManagerFixture, Greeter)
{
    const std::shared_ptr<std::string> socket_path {new std::string{*m_tmpdir+"/socket"}, file_deleter};
    const std::shared_ptr<std::string> public_keys_path {new std::string{*m_tmpdir+"/adb_keys"}, file_deleter};

    // start a mock AdbdServer ready to submit a request
    const std::string public_key {"public_key"};
    auto adbd_server = std::make_shared<GAdbdServer>(*socket_path, std::vector<std::string>{"PK"+public_key});
    // cppcheck in Ubuntu 20.04 requires the unused attribute to be set here...
    Q_UNUSED(adbd_server);

    // set up a UsbManager to process the request
    m_greeter->m_state.set(Greeter::State::ACTIVE);
    auto usb_manager = std::make_shared<UsbManager>(*socket_path, *public_keys_path, m_usb_monitor, m_greeter);
    // cppcheck in Ubuntu 20.04 requires the unused attribute to be set here...
    Q_UNUSED(usb_manager);

    // add a signal spy to listen to the notification daemon
    QSignalSpy notificationsSpy(
        &notificationsMockInterface(),
        SIGNAL(MethodCalled(const QString &, const QVariantList &))
    );

    // the greeter is active, so the notification should not appear
    EXPECT_FALSE(notificationsSpy.wait(2000));

    // disable the greeter, the notification should appear
    m_greeter->m_state.set(Greeter::State::INACTIVE);
    wait_for_signals(notificationsSpy, 1);
    EXPECT_EQ("Notify", notificationsSpy.at(0).at(0));
    notificationsSpy.clear();
}