Add JSON submodule and state class. This is failing to compile properly on macOS, trying on Linux

.gitignore

@@ -1 +1,2 @@
 build
+*.DS_Store

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "src/json"]
+	path = src/json
+	url = https://github.com/nlohmann/json.git

CMakeLists.txt

@@ -6,6 +6,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_VERBOSE_MAKEFILE ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules)
 
+
 find_package(OpenGL REQUIRED)
 find_package(GLUT REQUIRED)
 find_package(OpenCV HINTS /usr/local/opt/opencv /usr/local/Cellar/opencv REQUIRED)
@@ -14,6 +15,14 @@ set( NAME_SRC
     src/main.cpp    
 )
 
+ENABLE_TESTING()
+ADD_SUBDIRECTORY( test )
+set(UNIT_TEST state_test)
+add_test(NAME ${UNIT_TEST} COMMAND ${UNIT_TEST})
+add_custom_target(run_unit_test ALL
+    COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure
+    DEPENDS ${UNIT_TEST})
+
 set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
 add_executable( fd ${NAME_SRC} ${NAME_HEADERS} )
 

src/json

@@ -0,0 +1 @@
+Subproject commit 8c391e04fe4195d8be862c97f38cfe10e2a3472e

src/main.cpp

@@ -1,6 +1,10 @@
 #include "image.h"
+#include "state.h"
 
-int main(int argc, char** argv)
-{
+using namespace std;
 
+int main(int argc, char** argv) {
+    string action_load = "{\"action\" : 0 }";
+    json msg_data = json::parse(action_load);
+    MessageIn msgIn(msg_data);
 }

src/state.cpp

@@ -0,0 +1,7 @@
+#include "state.h"
+
+MessageIn::MessageIn (json msgData) {
+	if (msgData.contains("action")) {
+		action = static_cast<Action>(msgData["action"]);
+	}
+}

src/state.h

@@ -0,0 +1,56 @@
+#ifndef STATE_h
+#define STATE_h
+
+#include "json/single_include/nlohmann/json.hpp"
+#include <iostream>
+
+using json = nlohmann::json;
+using namespace std;
+
+enum Action { 
+	LOAD,
+	DISPLAY,
+	STOP
+};
+
+enum Mode {
+	RGB,
+	BW,
+	
+	INVERT,
+	BW_INVERT,
+
+	RGB_CHANNELS,
+	INVERT_CHANNELS
+};
+
+class MessageIn {
+	private:
+		Action action;
+		string file;
+		
+		Mode mode;
+		vector<uint64_t> exposure;
+		bool start;
+	public:
+		MessageIn(json msgJson);
+		Action getAction () { return action;}
+};
+/*
+class MessageOut {
+	public:
+		MessageOut(Action a, bool s);
+		Action action;
+		bool success;
+		string toString();
+};
+
+class State {
+	public :
+		MessageIn active;
+		State();
+		void processMessage(string msgString);
+		void createMessage(Action action, bool success);
+};
+*/
+#endif

test/CMakeLists.txt

@@ -0,0 +1,2 @@
+ADD_EXECUTABLE( state_test state_test.cpp )
+ADD_TEST(            fd state_test    )

test/state_test.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+#include "../src/state.h"
+
+void IS_TRUE(string name, bool x) { 
+    if (!(x)) {
+        cout << "Failed test " << name <<  ":" << endl;
+        cout << __FUNCTION__ << " failed on line " << __LINE__ << endl; 
+        exit(EXIT_FAILURE);
+    }
+}
+
+void test_message_in() {
+    //string action_load = "{\"action\" : 0 }";
+    //json msg_data = json::parse(action_load);
+    //MessageIn msgIn(msg_data);
+    //IS_TRUE("parses_action_load", msgIn.getAction() == LOAD);
+}
+
+int main(void) {
+    test_message_in();
+}