/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2009, 2011, 2012, 2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#if ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS)

#include "Notification.h"

#include "DOMWindow.h"
#include "DOMWindowNotifications.h"
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "ExceptionCode.h"
#include "NotificationCenter.h"
#include "NotificationController.h"
#include "NotificationPermissionCallback.h"
#include "VoidCallback.h"
#include "WindowFocusAllowedIndicator.h"

namespace WebCore {

#if ENABLE(LEGACY_NOTIFICATIONS)

Notification::Notification(const String& title, const String& body, URL&& iconURL, ScriptExecutionContext& context, NotificationCenter& notificationCenter)
    : ActiveDOMObject(&context)
    , m_icon(WTFMove(iconURL))
    , m_title(title)
    , m_body(body)
    , m_notificationCenter(&notificationCenter)
{
}

#endif

#if ENABLE(NOTIFICATIONS)

Notification::Notification(Document& document, const String& title)
    : ActiveDOMObject(&document)
    , m_title(title)
    , m_state(Idle)
    , m_notificationCenter(DOMWindowNotifications::webkitNotifications(*document.domWindow()))
    , m_taskTimer(std::make_unique<Timer>([this] () { show(); }))
{
    // FIXME: Seems that m_notificationCenter can be null so should not be changed from RefPtr to Ref.
    // But the rest of the code in this class isn't trying to handle that case.
    ASSERT(m_notificationCenter->client());
    m_taskTimer->startOneShot(0);
}

#endif

Notification::~Notification() 
{
}

#if ENABLE(LEGACY_NOTIFICATIONS)

ExceptionOr<Ref<Notification>> Notification::create(const String& title, const String& body, const String& iconURL, ScriptExecutionContext& context, NotificationCenter& provider)
{ 
    if (provider.checkPermission() != NotificationClient::PermissionAllowed)
        return Exception { SECURITY_ERR };

    URL completedIconURL = iconURL.isEmpty() ? URL() : context.completeURL(iconURL);
    if (!completedIconURL.isEmpty() && !completedIconURL.isValid())
        return Exception { SYNTAX_ERR };

    auto notification = adoptRef(*new Notification(title, body, WTFMove(completedIconURL), context, provider));
    notification.get().suspendIfNeeded();
    return WTFMove(notification);
}

#endif

#if ENABLE(NOTIFICATIONS)

static String directionString(Notification::Direction direction)
{
    // FIXME: Storing this as a string is not the right way to do it.
    // FIXME: Seems highly unlikely that this does the right thing for Auto.
    switch (direction) {
    case Notification::Direction::Auto:
        return ASCIILiteral("auto");
    case Notification::Direction::Ltr:
        return ASCIILiteral("ltr");
    case Notification::Direction::Rtl:
        return ASCIILiteral("rtl");
    }
    ASSERT_NOT_REACHED();
    return { };
}

Ref<Notification> Notification::create(Document& context, const String& title, const Options& options)
{
    auto notification = adoptRef(*new Notification(context, title));
    notification.get().m_body = options.body;
    notification.get().m_tag = options.tag;
    notification.get().m_lang = options.lang;
    notification.get().m_direction = directionString(options.dir);
    if (!options.icon.isEmpty()) {
        auto iconURL = context.completeURL(options.icon);
        if (iconURL.isValid())
            notification.get().m_icon = iconURL;
    }
    notification.get().suspendIfNeeded();
    return notification;
}

#endif

void Notification::show() 
{
    // prevent double-showing
    if (m_state == Idle && m_notificationCenter->client()) {
#if ENABLE(NOTIFICATIONS)
        auto* page = downcast<Document>(*scriptExecutionContext()).page();
        if (!page)
            return;
        if (NotificationController::from(page)->client().checkPermission(scriptExecutionContext()) != NotificationClient::PermissionAllowed) {
            dispatchErrorEvent();
            return;
        }
#endif
        if (m_notificationCenter->client()->show(this)) {
            m_state = Showing;
            setPendingActivity(this);
        }
    }
}

void Notification::close()
{
    switch (m_state) {
    case Idle:
        break;
    case Showing:
        if (m_notificationCenter->client())
            m_notificationCenter->client()->cancel(this);
        break;
    case Closed:
        break;
    }
}

void Notification::contextDestroyed()
{
    ActiveDOMObject::contextDestroyed();
    if (m_notificationCenter->client())
        m_notificationCenter->client()->notificationObjectDestroyed(this);
}

const char* Notification::activeDOMObjectName() const
{
    return "Notification";
}

bool Notification::canSuspendForDocumentSuspension() const
{
    // We can suspend if the Notification is not shown yet or after it is closed.
    return m_state == Idle || m_state == Closed;
}

void Notification::finalize()
{
    if (m_state == Closed)
        return;
    m_state = Closed;
    unsetPendingActivity(this);
}

void Notification::dispatchShowEvent()
{
    dispatchEvent(Event::create(eventNames().showEvent, false, false));
}

void Notification::dispatchClickEvent()
{
    WindowFocusAllowedIndicator windowFocusAllowed;
    dispatchEvent(Event::create(eventNames().clickEvent, false, false));
}

void Notification::dispatchCloseEvent()
{
    dispatchEvent(Event::create(eventNames().closeEvent, false, false));
    finalize();
}

void Notification::dispatchErrorEvent()
{
    dispatchEvent(Event::create(eventNames().errorEvent, false, false));
}

#if ENABLE(NOTIFICATIONS)

String Notification::permission(Document& document)
{
    return permissionString(NotificationController::from(document.page())->client().checkPermission(&document));
}

String Notification::permissionString(NotificationClient::Permission permission)
{
    switch (permission) {
    case NotificationClient::PermissionAllowed:
        return ASCIILiteral("granted");
    case NotificationClient::PermissionDenied:
        return ASCIILiteral("denied");
    case NotificationClient::PermissionNotAllowed:
        return ASCIILiteral("default");
    }
    ASSERT_NOT_REACHED();
    return { };
}

void Notification::requestPermission(Document& document, RefPtr<NotificationPermissionCallback>&& callback)
{
    NotificationController::from(document.page())->client().requestPermission(&document, WTFMove(callback));
}

#endif

} // namespace WebCore

#endif // ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS)