error checking

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.7)
 include(GNUInstallDirs)
 
 project (soupbot
-         VERSION 0.2.2
+         VERSION 0.2.3
          LANGUAGES CXX
 )
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall")

README.md

@@ -45,6 +45,7 @@ You will need a pre-generated authentication code.
 |        16 | Connection failed             |
 |        17 | TLS error                     |
 |        18 | Invalid response from server  |
+|        32 | File not readable             |
 | 100 - 999 | HTTP status codes             |
 |     65535 | Unknown exception             |
 

src/soupbot.cpp

@@ -100,17 +100,26 @@ int main(int argc, char *argv[])
     pt::ptree config;
     string instance = "";
     string access_token = "";
-
-    read_config(config, instance, access_token);
-
     pt::ptree ingredients;
-    pt::read_json(filepath + "ingredients.json", ingredients);
     std::vector<string> vegetables;
     std::vector<string> spices;
     std::vector<string> fruits;
     std::vector<string> misc;
     std::vector<string> highprio;
 
+    read_config(config, instance, access_token);
+
+    try
+    {
+        pt::read_json(filepath + "ingredients.json", ingredients);
+    }
+    catch (std::exception &e)
+    {
+        // most likely file not found
+        std::cerr << "ERROR: " << filepath << "ingredients.json not found or not readable.\n";
+        return 32;
+    }
+
     populate_vector(ingredients, "vegetables", vegetables);
     populate_vector(ingredients, "spices", spices);
     populate_vector(ingredients, "fruits", fruits);