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grive: an GPL program to sync a local directory with Google Drive
Copyright (C) 2012 Wan Wai Ho
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#pragma once
#include "util/DateTime.hh"
#include "util/Exception.hh"
#include "util/FileSystem.hh"
#include <string>
#include <vector>
#include <iosfwd>
namespace gr {
namespace http
class Agent ;
class Entry ;
class Json ;
/*! \brief A resource can be a file or a folder in the google drive
The google drive contains a number of resources, which is represented by this class.
It also contains linkage to other resources, such as parent and childrens.
class Resource
public :
struct Error : virtual Exception {} ;
typedef std::vector<Resource*> Children ;
typedef Children::const_iterator iterator ;
public :
Resource(const fs::path& root_folder) ;
Resource( const std::string& name, const std::string& kind ) ;
// default copy ctor & op= are fine
void Swap( Resource& coll ) ;
bool IsFolder() const ;
std::string Name() const ;
std::string SelfHref() const ;
std::string ResourceID() const ;
const Resource* Parent() const ;
Resource* Parent() ;
void AddChild( Resource *child ) ;
Resource* FindChild( const std::string& title ) ;
fs::path Path() const ;
bool IsInRootTree() const ;
bool IsRoot() const ;
bool HasID() const ;
std::string MD5() const ;
void FromRemote( const Entry& remote, const DateTime& last_sync ) ;
void FromLocal( const DateTime& last_sync ) ;
void Sync( http::Agent* http, DateTime& sync_time, const Json& options ) ;
// children access
iterator begin() const ;
iterator end() const ;
std::size_t size() const ;
std::string StateStr() const ;
private :
/// State of the resource. indicating what to do with the resource
enum State
/// The best state: the file is the same in remote and in local.
/// Resource created in local, but remote does not have it.
/// We should create the resource in google drive and upload new content
/// Resource exists in both local & remote, but changes in local is newer
/// than remote. We should upload local copy to overwrite remote.
/// Resource deleted from local since last time grive has checked.
/// Resource created in google drive, but not exist in local.
/// We should download the file.
/// Resource exists in both local & remote, but remote is newer.
/// Resource delete in remote, need to delete in local
/// invalid value
} ;
friend std::ostream& operator<<( std::ostream& os, State s ) ;
private :
void SetState( State new_state ) ;
void Download( http::Agent* http, const fs::path& file ) const ;
bool EditContent( http::Agent* http, bool new_rev ) ;
bool Create( http::Agent* http ) ;
bool Upload( http::Agent* http, const std::string& link, bool post ) ;
void FromRemoteFolder( const Entry& remote, const DateTime& last_sync ) ;
void FromRemoteFile( const Entry& remote, const DateTime& last_sync ) ;
void DeleteLocal() ;
void DeleteRemote( http::Agent* http ) ;
void AssignIDs( const Entry& remote ) ;
void SyncSelf( http::Agent* http, const Json& options ) ;
private :
std::string m_name ;
std::string m_kind ;
std::string m_md5 ;
DateTime m_mtime ;
std::string m_id ;
std::string m_href ;
std::string m_edit ;
std::string m_create ;
std::string m_content ;
std::string m_etag ;
// not owned
Resource *m_parent ;
std::vector<Resource*> m_child ;
State m_state ;
} ;
} // end of namespace
namespace std
void swap( gr::Resource& c1, gr::Resource& c2 ) ;
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