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/**
* @file llleaplistener.h
* @author Nat Goodspeed
* @date 2012-03-16
* @brief LLEventAPI supporting LEAP plugins
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Copyright (c) 2012, Linden Research, Inc.
* $/LicenseInfo$
*/
#if ! defined(LL_LLLEAPLISTENER_H)
#define LL_LLLEAPLISTENER_H
#include "lleventapi.h"
#include <functional>
#include <map>
#include <string>
/// Listener class implementing LLLeap query/control operations.
/// See https://jira.lindenlab.com/jira/browse/DEV-31978.
class LLLeapListener: public LLEventAPI
{
public:
/**
* Certain LLLeapListener operations listen on a specified LLEventPump.
* Accept a bool(pump, data) callback from our caller for when any such
* event is received.
*/
using Callback = std::function<bool(const std::string& pump, const LLSD& data)>;
LLLeapListener(const std::string_view& caller, const Callback& callback);
~LLLeapListener();
LLEventPump& getReplyPump() { return mReplyPump; }
static LLSD getFeatures();
private:
void newpump(const LLSD&);
void listen(const LLSD&);
void stoplistening(const LLSD&);
void ping(const LLSD&) const;
void getAPIs(const LLSD&) const;
void getAPI(const LLSD&) const;
void getFeatures(const LLSD&) const;
void getFeature(const LLSD&) const;
LLBoundListener connect(LLEventPump& pump, const std::string& listener);
void saveListener(const std::string& pump_name, const std::string& listener_name,
const LLBoundListener& listener);
// The relative order of these next declarations is important because the
// constructor will initialize in this order.
std::string mCaller;
Callback mCallback;
LLEventStream mReplyPump;
LLTempBoundListener mReplyConn;
// In theory, listen() could simply call the relevant LLEventPump's
// listen() method, stoplistening() likewise. Lifespan issues make us
// capture the LLBoundListener objects: when this object goes away, all
// those listeners should be disconnected. But what if the client listens,
// stops, listens again on the same LLEventPump with the same listener
// name? Merely collecting LLBoundListeners wouldn't adequately track
// that. So capture the latest LLBoundListener for this LLEventPump name
// and listener name.
typedef std::map<std::pair<std::string, std::string>, LLBoundListener> ListenersMap;
ListenersMap mListeners;
};
#endif /* ! defined(LL_LLLEAPLISTENER_H) */
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