YiAssetDownloadHelper.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_ASSET_DOWNLOAD_HELPER_H_
#define _YI_ASSET_DOWNLOAD_HELPER_H_

#include "asset/YiAsset.h"
#include "asset/YiAssetLoader.h"
#include "network/YiAbstractDownloadHelper.h"

class CYIHTTPRequest;
class CYIHTTPResponse;

class CYIAssetDownloadHelper : public CYIAbstractDownloadHelper, public CYIAssetLoader::DecodeListener
{
public:
    enum DOWNLOAD_STATE
    {
        IDLE = CYIAbstractDownloadHelper::IDLE,
        DOWNLOADING = CYIAbstractDownloadHelper::DOWNLOADING
    };

    enum FAILURE_TYPE
    {
        INVALID_URL = CYIAbstractDownloadHelper::INVALID_URL,
        NETWORK_ERROR = CYIAbstractDownloadHelper::NETWORK_ERROR,
        INVALID_ASSET
    };

    CYIAssetDownloadHelper();

    CYIAssetDownloadHelper(const CYIUrl &url);

    virtual ~CYIAssetDownloadHelper();
    
    DOWNLOAD_STATE GetDownloadState() const;
    
    CYISignal<const std::shared_ptr<CYIAsset> &, const CYIUrl & /*url*/> AssetReady;
    CYISignal<FAILURE_TYPE, const CYIUrl & /*url*/> AssetDownloadFailed;
    CYISignal<const CYIUrl & /*url*/> AssetDownloadCancelled;
    
protected:
    virtual void OnRequestCompleted(const std::shared_ptr<CYIHTTPRequest> &pRequest, const std::shared_ptr<CYIHTTPResponse> &pResponse, bool bCachedResponse) override;

    virtual void OnDecodeComplete(int32_t nJobID, std::shared_ptr<CYIAsset> pAsset, int32_t nLoadStatus, void *pListenerPrivate) override;

    virtual void CancelDownloadImplementation() override;

private:
    using CYIAbstractDownloadHelper::DownloadCancelled;
    using CYIAbstractDownloadHelper::DownloadComplete;
    using CYIAbstractDownloadHelper::DownloadFailed;

    bool IsValidAsset(std::shared_ptr<CYIAsset> pAsset) const;

    void ConvertDownloadFailedSignals(CYIAbstractDownloadHelper::FAILURE_TYPE, const CYIUrl & /*url*/);

    int32_t m_nAssetLoaderJobID;

    YI_DISALLOW_COPY_AND_ASSIGN(CYIAssetDownloadHelper)
};

#endif