/*
 * Copyright (C) 2011 Ericsson AB. All rights reserved.
 * Copyright (C) 2012 Google 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:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of Ericsson 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 "modules/mediastream/UserMediaRequest.h"

#include "bindings/core/v8/Dictionary.h"
#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/Document.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/SpaceSplitString.h"
#include "core/frame/Deprecation.h"
#include "modules/mediastream/MediaConstraintsImpl.h"
#include "modules/mediastream/MediaStream.h"
#include "modules/mediastream/MediaStreamConstraints.h"
#include "modules/mediastream/MediaTrackConstraints.h"
#include "modules/mediastream/UserMediaController.h"
#include "platform/mediastream/MediaStreamCenter.h"
#include "platform/mediastream/MediaStreamDescriptor.h"

namespace blink {

static WebMediaConstraints parseOptions(ExecutionContext* context, const BooleanOrMediaTrackConstraints& options, MediaErrorState& errorState)
{
    WebMediaConstraints constraints;

    Dictionary constraintsDictionary;
    if (options.isNull()) {
        // Do nothing.
    } else if (options.isMediaTrackConstraints()) {
        constraints = MediaConstraintsImpl::create(context, options.getAsMediaTrackConstraints(), errorState);
    } else {
        DCHECK(options.isBoolean());
        if (options.getAsBoolean()) {
            constraints = MediaConstraintsImpl::create();
        }
    }

    return constraints;
}

UserMediaRequest* UserMediaRequest::create(ExecutionContext* context, UserMediaController* controller, const MediaStreamConstraints& options, NavigatorUserMediaSuccessCallback* successCallback, NavigatorUserMediaErrorCallback* errorCallback, MediaErrorState& errorState)
{
    WebMediaConstraints audio = parseOptions(context, options.audio(), errorState);
    if (errorState.hadException())
        return nullptr;

    WebMediaConstraints video = parseOptions(context, options.video(), errorState);
    if (errorState.hadException())
        return nullptr;

    if (audio.isNull() && video.isNull()) {
        errorState.throwDOMException(SyntaxError, "At least one of audio and video must be requested");
        return nullptr;
    }

    return new UserMediaRequest(context, controller, audio, video, successCallback, errorCallback);
}

UserMediaRequest* UserMediaRequest::createForTesting(const WebMediaConstraints& audio, const WebMediaConstraints& video)
{
    return new UserMediaRequest(nullptr, nullptr, audio, video, nullptr, nullptr);
}

UserMediaRequest::UserMediaRequest(ExecutionContext* context, UserMediaController* controller, WebMediaConstraints audio, WebMediaConstraints video, NavigatorUserMediaSuccessCallback* successCallback, NavigatorUserMediaErrorCallback* errorCallback)
    : ContextLifecycleObserver(context)
    , m_audio(audio)
    , m_video(video)
    , m_controller(controller)
    , m_successCallback(successCallback)
    , m_errorCallback(errorCallback)
{
}

UserMediaRequest::~UserMediaRequest()
{
}

bool UserMediaRequest::audio() const
{
    return !m_audio.isNull();
}

bool UserMediaRequest::video() const
{
    return !m_video.isNull();
}

WebMediaConstraints UserMediaRequest::audioConstraints() const
{
    return m_audio;
}

WebMediaConstraints UserMediaRequest::videoConstraints() const
{
    return m_video;
}

bool UserMediaRequest::isSecureContextUse(String& errorMessage)
{
    Document* document = ownerDocument();

    if (document->isSecureContext(errorMessage)) {
        UseCounter::count(document->frame(), UseCounter::GetUserMediaSecureOrigin);
        UseCounter::countCrossOriginIframe(*document, UseCounter::GetUserMediaSecureOriginIframe);
        OriginsUsingFeatures::countAnyWorld(*document, OriginsUsingFeatures::Feature::GetUserMediaSecureOrigin);
        return true;
    }

    // While getUserMedia is blocked on insecure origins, we still want to
    // count attempts to use it.
    Deprecation::countDeprecation(document->frame(), UseCounter::GetUserMediaInsecureOrigin);
    Deprecation::countDeprecationCrossOriginIframe(*document, UseCounter::GetUserMediaInsecureOriginIframe);
    OriginsUsingFeatures::countAnyWorld(*document, OriginsUsingFeatures::Feature::GetUserMediaInsecureOrigin);
    return false;
}

Document* UserMediaRequest::ownerDocument()
{
    if (ExecutionContext* context = getExecutionContext()) {
        return toDocument(context);
    }

    return 0;
}

void UserMediaRequest::start()
{
    if (m_controller)
        m_controller->requestUserMedia(this);
}

void UserMediaRequest::succeed(MediaStreamDescriptor* streamDescriptor)
{
    if (!getExecutionContext())
        return;

    MediaStream* stream = MediaStream::create(getExecutionContext(), streamDescriptor);

    MediaStreamTrackVector audioTracks = stream->getAudioTracks();
    for (MediaStreamTrackVector::iterator iter = audioTracks.begin(); iter != audioTracks.end(); ++iter) {
        (*iter)->component()->source()->setConstraints(m_audio);
        (*iter)->setConstraints(m_audio);
    }

    MediaStreamTrackVector videoTracks = stream->getVideoTracks();
    for (MediaStreamTrackVector::iterator iter = videoTracks.begin(); iter != videoTracks.end(); ++iter) {
        (*iter)->component()->source()->setConstraints(m_video);
        (*iter)->setConstraints(m_video);
    }

    m_successCallback->handleEvent(stream);
}

void UserMediaRequest::failPermissionDenied(const String& message)
{
    if (!getExecutionContext())
        return;
    m_errorCallback->handleEvent(NavigatorUserMediaError::create(NavigatorUserMediaError::NamePermissionDenied, message, String()));
}

void UserMediaRequest::failConstraint(const String& constraintName, const String& message)
{
    DCHECK(!constraintName.isEmpty());
    if (!getExecutionContext())
        return;
    m_errorCallback->handleEvent(NavigatorUserMediaError::create(NavigatorUserMediaError::NameConstraintNotSatisfied, message, constraintName));
}

void UserMediaRequest::failUASpecific(const String& name, const String& message, const String& constraintName)
{
    DCHECK(!name.isEmpty());
    if (!getExecutionContext())
        return;
    m_errorCallback->handleEvent(NavigatorUserMediaError::create(name, message, constraintName));
}

void UserMediaRequest::contextDestroyed()
{
    if (m_controller) {
        m_controller->cancelUserMediaRequest(this);
        m_controller = nullptr;
    }

    ContextLifecycleObserver::contextDestroyed();
}

DEFINE_TRACE(UserMediaRequest)
{
    visitor->trace(m_controller);
    visitor->trace(m_successCallback);
    visitor->trace(m_errorCallback);
    ContextLifecycleObserver::trace(visitor);
}

} // namespace blink