Subscription by plugin to signals

Change-Id: Icb923f87df2be8eb664106bc9077b3a8221dd3ce
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

7 files changed, 106 insertions, 34 deletions

diff --git a/signal-composer-binding/signal-composer-binding.cpp b/signal-composer-binding/signal-composer-binding.cpp
index 860de07..5ff24b0 100644
--- a/signal-composer-binding/signal-composer-binding.cpp
+++ b/signal-composer-binding/signal-composer-binding.cpp
@@ -85,41 +85,44 @@ void get(afb_req request)
 
 int loadConf()
 {
-	int ret = 0;
+	int err = 0;
 	const char* rootdir = strncat(GetBindingDirPath(), "/etc",
 		sizeof(GetBindingDirPath()) - strlen(GetBindingDirPath()) -1);
 
 	bindingApp& bApp = bindingApp::instance();
-	ret = bApp.loadConfig(rootdir);
+	err = bApp.loadConfig(rootdir);
 
 	#ifdef CONTROL_SUPPORT_LUA
-		ret += LuaConfigLoad();
+		err += LuaConfigLoad();
 	#endif
 
-	return ret;
+	return err;
 }
 
 int execConf()
 {
 	bindingApp& bApp = bindingApp::instance();
-	int ret = CtlConfigExec(bApp.ctlConfig());
+	int err = 0;
+	CtlConfigExec(bApp.ctlConfig());
 	std::vector<std::shared_ptr<Signal>> allSignals = bApp.getAllSignals();
 	ssize_t sigCount = allSignals.size();
 	for( std::shared_ptr<Signal>& sig: allSignals)
 	{
-		sig->attachToSources(bApp);
+		sig->attachToSourceSignals(bApp);
 	}
 
 	for(auto& sig: allSignals)
 	{
-		if( (ret = sig->recursionCheck()) )
+		if( (err += sig->recursionCheck()) )
 		{
 			AFB_ERROR("There is an infinite recursion loop in your signals definition. Root coming from signal: %s", sig->id().c_str());
-			return ret;
+			return err;
 		}
 	}
 
+	bApp.execSubscription();
+
 	AFB_DEBUG("Signal Composer Control configuration Done.\n signals=%d", (int)sigCount);
 
-	return ret;
+	return err;
 }
diff --git a/signal-composer-binding/signal-composer.cpp b/signal-composer-binding/signal-composer.cpp
index a1300e3..3158797 100644
--- a/signal-composer-binding/signal-composer.cpp
+++ b/signal-composer-binding/signal-composer.cpp
@@ -114,7 +114,7 @@ CtlActionT* bindingApp::convert2Action(const std::string& name, json_object* act
 int bindingApp::loadOneSourceAPI(json_object* sourceJ)
 {
 	json_object *initJ = nullptr, *getSignalJ = nullptr;
-	CtlActionT *initCtl, *getSignalCtl;
+	CtlActionT *initCtl = nullptr, *getSignalCtl = nullptr;
 	const char *api, *info;
 
 	int err = wrap_json_unpack(sourceJ, "{ss,s?s,s?o,s?o !}",
@@ -205,7 +205,6 @@ int bindingApp::loadOneSignal(json_object* signalJ)
 	}
 
 	// Process sources JSON object
-	// TODO: claneys, really needs to factorize JSON array processing
 	if (json_object_get_type(sourcesJ) == json_type_array)
 	{
 		int count = json_object_array_length(sourcesJ);
@@ -251,19 +250,22 @@ int bindingApp::loadSignals(CtlSectionT* section, json_object *signalsJ)
 	int err = 0;
 	bindingApp& bApp = instance();
 
-	if (json_object_get_type(signalsJ) == json_type_array)
+	if(signalsJ)
 	{
-		int count = json_object_array_length(signalsJ);
-
-		for (int idx = 0; idx < count; idx++)
+		if (json_object_get_type(signalsJ) == json_type_array)
 		{
-			json_object *signalJ = json_object_array_get_idx(signalsJ, idx);
-			err = bApp.loadOneSignal(signalJ);
-			if (err) return err;
+			int count = json_object_array_length(signalsJ);
+
+			for (int idx = 0; idx < count; idx++)
+			{
+				json_object *signalJ = json_object_array_get_idx(signalsJ, idx);
+				err = bApp.loadOneSignal(signalJ);
+				if (err) return err;
+			}
 		}
+		else
+			{err = bApp.loadOneSignal(signalsJ);}
 	}
-	else
-		{err = bApp.loadOneSignal(signalsJ);}
 
 	return err;
 }
@@ -306,3 +308,16 @@ CtlConfigT* bindingApp::ctlConfig()
 {
 	return ctlConfig_;
 }
+
+int bindingApp::execSubscription() const
+{
+	int err = 0;
+	for(const SourceAPI& srcAPI: sourcesList_)
+	{
+		if (srcAPI.api() != std::string(ctlConfig_->api))
+		{
+			err += srcAPI.makeSubscription();
+		}
+	}
+	return err;
+}
diff --git a/signal-composer-binding/signal-composer.hpp b/signal-composer-binding/signal-composer.hpp
index 8affc7a..2a79779 100644
--- a/signal-composer-binding/signal-composer.hpp
+++ b/signal-composer-binding/signal-composer.hpp
@@ -47,8 +47,10 @@ public:
 	int loadConfig(const std::string& filepath);
 	//void loadSignalsFile(std::string signalsFile);
 
+	CtlConfigT* ctlConfig();
+	std::vector<std::shared_ptr<Signal>> getAllSignals();
 	SourceAPI* getSourceAPI(const std::string& api);
 	std::shared_ptr<Signal> searchSignal(const std::string& aName);
-	std::vector<std::shared_ptr<Signal>> getAllSignals();
-	CtlConfigT* ctlConfig();
+
+	int execSubscription() const;
 };
diff --git a/signal-composer-binding/signal.cpp b/signal-composer-binding/signal.cpp
index 0689a99..2dc517c 100644
--- a/signal-composer-binding/signal.cpp
+++ b/signal-composer-binding/signal.cpp
@@ -26,7 +26,7 @@ Signal::Signal(const std::string& id,
 			double frequency,
 			CtlActionT* onReceived)
 :id_(id),
- sourcesSig_(sources),
+ signalSigList_(sources),
  frequency_(frequency),
  unit_(unit),
  onReceived_(onReceived)
@@ -48,17 +48,46 @@ bool Signal::operator ==(const Signal& other) const
 bool Signal::operator==(const std::string& aName) const
 {
 	if(id_ == aName) {return true;}
-	for( const std::string& src : sourcesSig_)
+	for( const std::string& src : signalSigList_)
 	{
 		if(src == aName) {return true;}
 	}
 	return false;
 }
 
-std::string Signal::id() const
+const std::string Signal::id() const
 {
 	return id_;
 }
+
+json_object* Signal::toJSON() const
+{
+	json_object* queryJ = nullptr;
+	std::vector<std::string> lowSignalName;
+	for (const std::string& src: signalSigList_ )
+	{
+		ssize_t sep = src.find_first_of("/");
+		if(sep != std::string::npos)
+		{
+			lowSignalName.push_back(src.substr(sep+1));
+		}
+	}
+	json_object* nameArray = json_object_new_array();
+	for (const std::string& lowSig: lowSignalName)
+	{
+		json_object_array_add(nameArray, json_object_new_string(lowSig.c_str()));
+	}
+	/*json_object_object_add(queryJ, "signal", nameArray);
+	json_object_object_add(queryJ, "unit", json_object_new_string(unit_.c_str()));
+	json_object_object_add(queryJ, "unit", json_object_new_double(frequency_));*/
+	wrap_json_pack(&queryJ, "{so,ss*,sf*}",
+			"signal", nameArray,
+			"unit", unit_.c_str(),
+			"frequency", frequency_);
+
+	return queryJ;
+}
+
 void update(double timestamp, double value)
 {
 	AFB_NOTICE("Got an update from observed signal");
@@ -74,9 +103,9 @@ void Signal::attach(Signal* obs)
 	Observers_.push_back(obs);
 }
 
-void Signal::attachToSources(bindingApp& bApp)
+void Signal::attachToSourceSignals(bindingApp& bApp)
 {
-	for (const std::string& srcSig: sourcesSig_)
+	for (const std::string& srcSig: signalSigList_)
 	{
 		if(srcSig.find("/") == std::string::npos)
 		{
diff --git a/signal-composer-binding/signal.hpp b/signal-composer-binding/signal.hpp
index cb50c67..4d4c641 100644
--- a/signal-composer-binding/signal.hpp
+++ b/signal-composer-binding/signal.hpp
@@ -28,7 +28,7 @@ class Signal
 {
 private:
 	std::string id_;
-	std::vector<std::string> sourcesSig_;
+	std::vector<std::string> signalSigList_;
 	long long int timestamp_;
 	double value_;
 	std::map<long long int, double> history_; ///< history_ - Hold signal value history in map with <timestamp, value>
@@ -46,11 +46,12 @@ public:
 	bool operator==(const Signal& other) const;
 	bool operator==(const std::string& aName) const;
 
-	std::string id() const;
+	const std::string id() const;
+	json_object* toJSON() const;
 
 	void update(long long int timestamp, double value);
 	int onReceivedCB(json_object *queryJ);
-	void attachToSources(bindingApp& bApp);
+	void attachToSourceSignals(bindingApp& bApp);
 	void notify();
 
 	//virtual double average() const;
diff --git a/signal-composer-binding/source.cpp b/signal-composer-binding/source.cpp
index 6e7fec2..80c59d6 100644
--- a/signal-composer-binding/source.cpp
+++ b/signal-composer-binding/source.cpp
@@ -33,19 +33,39 @@ void SourceAPI::addSignal(const std::string& id, std::vector<std::string>& sourc
 {
 	std::shared_ptr<Signal> sig = std::make_shared<Signal>(id, sources, unit, frequency, onReceived);
 
-	signals_.push_back(sig);
+	signalsList_.push_back(sig);
 }
 
 std::vector<std::shared_ptr<Signal>> SourceAPI::getSignals() const
 {
-	return signals_;
+	return signalsList_;
 }
 
 std::shared_ptr<Signal> SourceAPI::searchSignal(const std::string& name) const
 {
-	for (auto& sig: signals_)
+	for (auto& sig: signalsList_)
 	{
 		if(*sig == name) {return sig;}
 	}
 	return nullptr;
 }
+
+int SourceAPI::makeSubscription() const
+{
+	int err = 0;
+	if(getSignal_)
+	{
+		for(std::shared_ptr<Signal> sig: signalsList_)
+		{
+			json_object* lowSignalNameJ = sig->toJSON();
+			if(!lowSignalNameJ)
+			{
+				AFB_ERROR("Error building JSON query object to subscribe to for signal %s", sig->id().c_str());
+				return -1;
+			}
+			err += ActionExecOne(getSignal_, lowSignalNameJ);
+		}
+	}
+
+	return err;
+}
diff --git a/signal-composer-binding/source.hpp b/signal-composer-binding/source.hpp
index c1644c5..c295b6e 100644
--- a/signal-composer-binding/source.hpp
+++ b/signal-composer-binding/source.hpp
@@ -28,7 +28,7 @@ private:
 	CtlActionT* init_;
 	CtlActionT* getSignal_;
 
-	std::vector<std::shared_ptr<Signal>> signals_;
+	std::vector<std::shared_ptr<Signal>> signalsList_;
 
 public:
 	SourceAPI();
@@ -39,4 +39,6 @@ public:
 
 	std::vector<std::shared_ptr<Signal>> getSignals() const;
 	std::shared_ptr<Signal> searchSignal(const std::string& name) const;
+
+	int makeSubscription() const;
 };