/* Copyright (C) 2014 J.F.Dockes
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _SERVICE_H_X_INCLUDED_
#define _SERVICE_H_X_INCLUDED_
#include <string>
#include <functional>
#include <unordered_map>
#include <upnp/upnp.h>
#include "libupnpp/log.hxx"
#include "libupnpp/soaphelp.hxx"
#include "libupnpp/control/description.hxx"
#include "libupnpp/control/cdircontent.hxx"
namespace UPnPClient {
/** To be implemented by upper-level client code for event
* reporting. Runs in an event thread. This could for example be
* implemented by a Qt Object to generate events for the GUI.
*/
class VarEventReporter {
public:
virtual ~VarEventReporter() {};
// Using char * to avoid any issue with strings and concurrency
virtual void changed(const char *nm, int val) = 0;
virtual void changed(const char *nm, const char *val) = 0;
// Used for track metadata (parsed as content directory entry). Not always
// needed.
virtual void changed(const char *nm, UPnPDirObject meta) {};
};
typedef
std::function<void (const std::unordered_map<std::string, std::string>&)>
evtCBFunc;
class Service {
public:
/** Construct by copying data from device and service objects.
*/
Service(const UPnPDeviceDesc& device,
const UPnPServiceDesc& service, bool doSubscribe = true);
/** An empty one */
Service() : m_reporter(0) {}
virtual ~Service();
/** Retrieve my root device "friendly name". */
std::string getFriendlyName() const {return m_friendlyName;}
/** Return my root device id */
std::string getDeviceId() const {return m_deviceId;}
virtual int runAction(const SoapEncodeInput& args, SoapDecodeOutput& data);
virtual VarEventReporter *getReporter()
{
return m_reporter;
}
virtual void installReporter(VarEventReporter* reporter)
{
m_reporter = reporter;
}
// Can't copy these because this does not make sense for the
// member function callback.
Service(Service const&) = delete;
Service& operator=(Service const&) = delete;
protected:
/** Registered callbacks for the service objects. The map is
* indexed by m_SID, the subscription id which was obtained by
* each object when subscribing to receive the events for its
* device. The map allows the static function registered with
* libupnp to call the appropriate object method when it receives
* an event. */
static std::unordered_map<std::string, evtCBFunc> o_calls;
/** Used by a derived class to register its callback method. This
* creates an entry in the static map, using m_SID, which was
* obtained by subscribe() during construction
*/
void registerCallback(evtCBFunc c);
/** Upper level client code event callbacks */
VarEventReporter *m_reporter;
std::string m_actionURL;
std::string m_eventURL;
std::string m_serviceType;
std::string m_deviceId;
std::string m_friendlyName;
std::string m_manufacturer;
std::string m_modelName;
int runTrivialAction(const std::string& nm) {
SoapEncodeInput args(m_serviceType, nm);
SoapDecodeOutput data;
return runAction(args, data);
}
template <class T> int runSimpleGet(const std::string& actnm,
const std::string& valnm,
T *valuep) {
SoapEncodeInput args(m_serviceType, actnm);
SoapDecodeOutput data;
int ret = runAction(args, data);
if (ret != UPNP_E_SUCCESS) {
return ret;
}
if (!data.get(valnm.c_str(), valuep)) {
LOGERR("Service::runSimpleAction: " << actnm <<
" missing " << valnm << " in response" << endl);
return UPNP_E_BAD_RESPONSE;
}
return 0;
}
template <class T> int runSimpleAction(const std::string& actnm,
const std::string& valnm,
T value) {
SoapEncodeInput args(m_serviceType, actnm);
args(valnm, SoapHelp::val2s(value));
SoapDecodeOutput data;
return runAction(args, data);
}
private:
/** Only actually does something on the first call, to register our
* (static) library callback */
static bool initEvents();
/** The static event callback given to libupnp */
static int srvCB(Upnp_EventType et, void* vevp, void*);
/* Tell the UPnP device (through libupnp) that we want to receive
its events. This is called during construction and sets m_SID */
virtual bool subscribe();
virtual bool unSubscribe();
Upnp_SID m_SID; /* Subscription Id */
};
} // namespace UPnPClient
#endif /* _SERVICE_H_X_INCLUDED_ */