MediaHandler.h

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#ifndef ZYPP_MEDIA_MEDIAHANDLERL_H
#define ZYPP_MEDIA_MEDIAHANDLERL_H

#include <iosfwd>
#include <string>
#include <list>

#include "zypp/Pathname.h"
#include "zypp/PathInfo.h"
#include "zypp/base/PtrTypes.h"

#include "zypp/Url.h"

#include "zypp/media/MediaSource.h"
#include "zypp/media/MediaException.h"
#include "zypp/APIConfig.h"

namespace zypp {
  namespace media {


//
//      CLASS NAME : MediaHandler
class MediaHandler {
    friend std::ostream & operator<<( std::ostream & str, const MediaHandler & obj );

    public:
        typedef shared_ptr<MediaHandler> Ptr;
        typedef shared_ptr<const MediaHandler> constPtr;

        static bool setAttachPrefix(const Pathname &attach_prefix);

        static std::string getRealPath(const std::string &path);
        static Pathname    getRealPath(const Pathname    &path);

    private:
        static Pathname _attachPrefix;

        mutable
        MediaSourceRef  _mediaSource;

        AttachPointRef  _attachPoint;

        AttachPoint     _attachPointHint;

        Pathname        _relativeRoot;

        bool            _does_download;

        mutable time_t  _attach_mtime;

        mutable Pathname _deltafile;

    protected:
        const Url        _url;

        MediaAccessId    _parentId;

        friend class MediaAccess;

        bool             dependsOnParent(MediaAccessId parentId,
                                         bool exactIdMatch);
        bool             dependsOnParent();

        void             resetParentId();

        Pathname         attachPoint() const;

        void             setAttachPoint(const Pathname &path, bool temp);

        void             setAttachPoint(const AttachPointRef &ref);

        AttachPoint      attachPointHint() const;

        void             attachPointHint(const Pathname &path, bool temp);

        Pathname         createAttachPoint() const;
        Pathname         createAttachPoint(const Pathname &attach_root) const;

        void             removeAttachPoint();

        virtual bool     checkAttachPoint(const Pathname &apoint) const;

        static bool      checkAttachPoint(const Pathname &apoint,
                                          bool            empty_dir,
                                          bool            writeable);

        bool             isUseableAttachPoint(const Pathname &path,
                                              bool            mtab=true) const;

        std::string      mediaSourceName() const
        {
          return _mediaSource ? _mediaSource->name : "";
        }

        void             setMediaSource(const MediaSourceRef &ref);

        AttachedMedia
        findAttachedMedia(const MediaSourceRef &media) const;

        AttachedMedia    attachedMedia() const;

        bool             isSharedMedia() const;

        bool             checkAttached(bool matchMountFs) const;

        void             forceRelaseAllMedia(bool matchMountFs);
        void             forceRelaseAllMedia(const MediaSourceRef &ref,
                                             bool matchMountFs);

    protected:

        //
        // Real action interface to be overloaded by concrete handler.
        //

        virtual void attachTo(bool next = false) = 0;

        virtual void disconnectFrom() { return; }

        virtual void releaseFrom( const std::string & ejectDev = "" ) = 0;

        virtual void forceEject( const std::string & device ) {}

        virtual void getFile( const Pathname & filename, const ByteCount &expectedFileSize_r ) const;

        virtual void getFileCopy( const Pathname & srcFilename, const Pathname & targetFilename, const ByteCount &expectedFileSize_r ) const;


        virtual void getDir( const Pathname & dirname, bool recurse_r ) const = 0;

        virtual void getDirInfo( std::list<std::string> & retlist,
                                 const Pathname & dirname, bool dots = true ) const = 0;

        virtual void getDirInfo( filesystem::DirContent & retlist,
                                 const Pathname & dirname, bool dots = true ) const = 0;

        virtual bool getDoesFileExist( const Pathname & filename ) const = 0;

  protected:

        void getDirectoryYast( std::list<std::string> & retlist,
                               const Pathname & dirname, bool dots = true ) const;

        void getDirectoryYast( filesystem::DirContent & retlist,
                               const Pathname & dirname, bool dots = true ) const;

  public:

        MediaHandler ( const Url&       url_r,
                       const Pathname & attach_point_r,
                       const Pathname & urlpath_below_attachpoint_r,
                       const bool       does_download_r );

        virtual ~MediaHandler();

    public:


        //
        // MediaAccess interface. Does common checks and logging.
        // Invokes real action if necessary.
        //

        bool        downloads() const { return _does_download; }

        std::string protocol() const { return _url.getScheme(); }

        Url url() const { return _url; }

        void attach(bool next);

        virtual bool isAttached() const { return _mediaSource != nullptr; }

        Pathname localRoot() const;

         Pathname localPath( const Pathname & pathname ) const;

        void disconnect();

        void release( const std::string & ejectDev = "" );

        void provideFile( Pathname filename, const ByteCount &expectedFileSize_r ) const;

        void provideFileCopy( Pathname srcFilename, Pathname targetFilename, const ByteCount &expectedFileSize_r ) const;

        void provideDir( Pathname dirname ) const;

        void provideDirTree( Pathname dirname ) const;

        void releaseFile( const Pathname & filename ) const { return releasePath( filename ); }

        void releaseDir( const Pathname & dirname ) const { return releasePath( dirname ); }

        void releasePath( Pathname pathname ) const;

        /*
         * set a deltafile to be used in the next download
         */
        void setDeltafile( const Pathname &filename = Pathname()) const;

        /*
         * return the deltafile set with setDeltafile()
         */
        Pathname deltafile () const;

    public:

        void dirInfo( std::list<std::string> & retlist,
                      const Pathname & dirname, bool dots = true ) const;

        void dirInfo( filesystem::DirContent & retlist,
                      const Pathname & dirname, bool dots = true ) const;

        bool doesFileExist( const Pathname & filename ) const;

        virtual bool hasMoreDevices();

        virtual void
        getDetectedDevices(std::vector<std::string> & devices,
                           unsigned int & index) const;
};


  } // namespace media
} // namespace zypp


#endif // ZYPP_MEDIA_MEDIAHANDLERL_H