More accurate (un)subscribe answer

Answer a failure when attempting to subscibe a non-existent
signal but don't report error on unsubscription.

Change-Id: Iac4bfe52ce84b47fbfa5717cd9ee2bf02231f52f
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 12 insertions, 5 deletions

diff --git a/signal-composer-binding/signal-composer-binding.cpp b/signal-composer-binding/signal-composer-binding.cpp
index 310cb40..7d3391b 100644
--- a/signal-composer-binding/signal-composer-binding.cpp
+++ b/signal-composer-binding/signal-composer-binding.cpp
@@ -83,15 +83,22 @@ static int one_subscribe_unsubscribe(struct afb_req request,
 	int err = 0;
 	std::vector<std::shared_ptr<Signal>> signals = Composer::instance().searchSignals(event);
 
-	if(subscribe)
+	if(signals.size() == 0 && subscribe)
 	{
-		cContext->appendSignals(signals);
-		err = cContext->makeSubscription(request);
+		err--;
 	}
 	else
 	{
-		cContext->subtractSignals(signals);
-		err = cContext->makeUnsubscription(request);
+		if(subscribe)
+		{
+			cContext->appendSignals(signals);
+			err = cContext->makeSubscription(request);
+		}
+		else
+		{
+			cContext->subtractSignals(signals);
+			err = cContext->makeUnsubscription(request);
+		}
 	}
 
 	return err;