[edit] Retrieve the event name from mongoDB event payload

src/main.cpp

@@ -30,16 +30,18 @@ int main(int argc, char **argv){
 	auto mongoHandler = std::make_unique<mongoStub>();
 
 	mongocxx::options::change_stream options;
+	//voiceEvents collection watcher
     mongocxx::change_stream colCs = mongoHandler->getCol().watch(options);
 
+	std::cout << "Server created and listening for events" << std::endl;
+
 	//Check for new messages in the collection
 	for (;;){
-		std::vector<std::string> t = mongoHandler->getNewMessages(&colCs);
+		std::vector<mongoStub::mongoMessage> t = mongoHandler->getNewMessages(&colCs);
 		for(auto &i : t){
-			std::cout << i << std::endl;
+			std::cout << "[" << i.eventName << "] " << std::endl;
 		}
 	}
-	std::cout << "Server created" << std::endl;
 
 	return 0;
 }

src/mongoStub.cpp

@@ -17,10 +17,28 @@ mongoStub::mongoStub() {
     }
 }
 
-std::vector<std::string>mongoStub::getNewMessages(mongocxx::change_stream* colCs) {
+//Too slow for my liking
-	std::vector<std::string> retVec;
+std::vector<mongoStub::mongoMessage> mongoStub::getNewMessages(mongocxx::change_stream* colCs) {
-    for (const auto& event : *colCs) {
+	std::vector<mongoStub::mongoMessage> retVec;
-        retVec.push_back(bsoncxx::to_json(event));
+	
+    for (auto&& event : *colCs) {
+		mongoStub::mongoMessage returnValue;
+
+		/*if(event["fullDocument"]["data"]){
+				returnValue.data.push_back(event["fullDocument"]["data"].get_utf8().value.to_string());
+			}*/
+
+
+		
+		std::cout << bsoncxx::to_json(event) << std::endl;
+
+		//Oly listen to insert events (to avoid "precondition failed: data" exception)
+		if(event["operationType"].get_utf8().value.to_string()!="insert"){
+			continue;
 		}
+		returnValue.eventName = event["fullDocument"]["event"].get_utf8().value.to_string();
+		retVec.push_back(returnValue);
+    }
+
 	return retVec;
 }

src/mongoStub.hpp

@@ -7,17 +7,26 @@
 #include <vector>
 #include <mongocxx/client.hpp>
 #include <mongocxx/instance.hpp>
-#include <mongocxx/v_noabi/mongocxx/change_stream.hpp>
+#include <mongocxx/change_stream.hpp>
 #include <bsoncxx/json.hpp>
+#include <bsoncxx/document/element.hpp>
 
 
-class mongoStub : boost::noncopyable {
+class mongoStub{
 	public:
 		mongoStub();
-		std::vector<std::string> getNewMessages(mongocxx::change_stream* colCs);
+
+		struct mongoMessage{
+			std::string eventName;
+			std::vector<std::string> data;
+		};
+
+		std::vector<mongoMessage> getNewMessages(mongocxx::change_stream* colCs);
 
 		mongocxx::collection getCol() const { return col; }
 
+		
+		
 	private:
 		mongocxx::instance instance;
 		mongocxx::client client{mongocxx::uri{}};