/*
 * Copyright (C) 2007, 2015 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:
 * 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. ``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
 * 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. 
 */
#ifndef DefaultDownloadDelegate_h
#define DefaultDownloadDelegate_h

#include "WebKit.h"
#include <wtf/HashSet.h>

#if USE(CFURLCONNECTION)
#include <CFNetwork/CFURLDownloadPriv.h>
#endif

class DefaultDownloadDelegate final : public IWebDownloadDelegate
{
public:
    static DefaultDownloadDelegate* sharedInstance();
    static DefaultDownloadDelegate* createInstance();

    // IUnknown
    virtual HRESULT STDMETHODCALLTYPE QueryInterface(_In_ REFIID riid, _COM_Outptr_ void** ppvObject);
    virtual ULONG STDMETHODCALLTYPE AddRef();
    virtual ULONG STDMETHODCALLTYPE Release();

    // IWebDownloadDelegate
    virtual HRESULT STDMETHODCALLTYPE decideDestinationWithSuggestedFilename(_In_opt_ IWebDownload*, _In_ BSTR filename);
    virtual HRESULT STDMETHODCALLTYPE didCancelAuthenticationChallenge(_In_opt_ IWebDownload*, _In_opt_ IWebURLAuthenticationChallenge*);
    virtual HRESULT STDMETHODCALLTYPE didCreateDestination(_In_opt_ IWebDownload*, _In_ BSTR destination);
    virtual HRESULT STDMETHODCALLTYPE didFailWithError(_In_opt_ IWebDownload*, _In_opt_ IWebError*);
    virtual HRESULT STDMETHODCALLTYPE didReceiveAuthenticationChallenge(_In_opt_ IWebDownload*, _In_opt_ IWebURLAuthenticationChallenge*);
    virtual HRESULT STDMETHODCALLTYPE didReceiveDataOfLength(_In_opt_ IWebDownload*,  unsigned length);
    virtual HRESULT STDMETHODCALLTYPE didReceiveResponse(_In_opt_ IWebDownload*, _In_opt_ IWebURLResponse*);
    virtual HRESULT STDMETHODCALLTYPE shouldDecodeSourceDataOfMIMEType(_In_opt_ IWebDownload*, _In_ BSTR encodingType, _Out_ BOOL* shouldDecode);
    virtual HRESULT STDMETHODCALLTYPE willResumeWithResponse(_In_opt_ IWebDownload*, _In_opt_ IWebURLResponse*, long long fromByte);
    virtual HRESULT STDMETHODCALLTYPE willSendRequest(_In_opt_ IWebDownload*, _In_opt_ IWebMutableURLRequest*, _In_opt_ IWebURLResponse* redirectResponse, _COM_Outptr_opt_ IWebMutableURLRequest** finalRequest);
    virtual HRESULT STDMETHODCALLTYPE didBegin(_In_opt_ IWebDownload*);
    virtual HRESULT STDMETHODCALLTYPE didFinish(_In_opt_ IWebDownload*);

    // DefaultDownloadDelegate
    void registerDownload(IWebDownload*);
    void unregisterDownload(IWebDownload*);

private:
    DefaultDownloadDelegate();
    ~DefaultDownloadDelegate();

    ULONG m_refCount { 0 };

    HashSet<IWebDownload*> m_downloads;
};

#endif