/*
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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/filesystem/DOMWindowFileSystem.h"

#include "core/dom/Document.h"
#include "core/fileapi/FileError.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/UseCounter.h"
#include "modules/filesystem/DOMFileSystem.h"
#include "modules/filesystem/EntryCallback.h"
#include "modules/filesystem/ErrorCallback.h"
#include "modules/filesystem/FileSystemCallback.h"
#include "modules/filesystem/FileSystemCallbacks.h"
#include "modules/filesystem/LocalFileSystem.h"
#include "platform/FileSystemType.h"
#include "platform/weborigin/SchemeRegistry.h"
#include "platform/weborigin/SecurityOrigin.h"

namespace blink {

void DOMWindowFileSystem::webkitRequestFileSystem(DOMWindow& windowArg, int type, long long size, FileSystemCallback* successCallback, ErrorCallback* errorCallback)
{
    LocalDOMWindow& window = toLocalDOMWindow(windowArg);
    if (!window.isCurrentlyDisplayedInFrame())
        return;

    Document* document = window.document();
    if (!document)
        return;

    if (SchemeRegistry::schemeShouldBypassContentSecurityPolicy(document->getSecurityOrigin()->protocol()))
        UseCounter::count(document, UseCounter::RequestFileSystemNonWebbyOrigin);

    if (!document->getSecurityOrigin()->canAccessFileSystem()) {
        DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::SECURITY_ERR));
        return;
    }

    FileSystemType fileSystemType = static_cast<FileSystemType>(type);
    if (!DOMFileSystemBase::isValidType(fileSystemType)) {
        DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::INVALID_MODIFICATION_ERR));
        return;
    }

    LocalFileSystem::from(*document)->requestFileSystem(document, fileSystemType, size, FileSystemCallbacks::create(successCallback, errorCallback, document, fileSystemType));
}

void DOMWindowFileSystem::webkitResolveLocalFileSystemURL(DOMWindow& windowArg, const String& url, EntryCallback* successCallback, ErrorCallback* errorCallback)
{
    LocalDOMWindow& window = toLocalDOMWindow(windowArg);
    if (!window.isCurrentlyDisplayedInFrame())
        return;

    Document* document = window.document();
    if (!document)
        return;

    SecurityOrigin* securityOrigin = document->getSecurityOrigin();
    KURL completedURL = document->completeURL(url);
    if (!securityOrigin->canAccessFileSystem() || !securityOrigin->canRequest(completedURL)) {
        DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::SECURITY_ERR));
        return;
    }

    if (!completedURL.isValid()) {
        DOMFileSystem::scheduleCallback(document, errorCallback, FileError::create(FileError::ENCODING_ERR));
        return;
    }

    LocalFileSystem::from(*document)->resolveURL(document, completedURL, ResolveURICallbacks::create(successCallback, errorCallback, document));
}

static_assert(static_cast<int>(DOMWindowFileSystem::TEMPORARY) == static_cast<int>(FileSystemTypeTemporary), "DOMWindowFileSystem::TEMPORARY should match FileSystemTypeTemporary");
static_assert(static_cast<int>(DOMWindowFileSystem::PERSISTENT) == static_cast<int>(FileSystemTypePersistent), "DOMWindowFileSystem::PERSISTENT should match FileSystemTypePersistent");

} // namespace blink