Added API key generation

main.cpp

@@ -18,6 +18,56 @@ using nlohmann::json;
 
 using namespace std;
 
+constexpr int API_KEY_LENGHT = 16;
+
+string generate_api_key(int len = API_KEY_LENGHT)
+{
+	string result = "";
+	std::random_device rand;
+	std::uniform_int_distribution distribution(0, 63);
+	int single;
+	char symbol;
+
+	if (len < 0)
+	{
+		len = API_KEY_LENGHT;
+	}
+
+	for (int i = 0; i < len; ++i)
+	{
+		single = distribution(rand);
+		if (single <= 9)
+		{
+			symbol = '0' + single;
+		}
+		else if ((single >= 10) && (single <= 35))
+		{
+			symbol = 'A' + single - 10;
+		}
+		else if ((single >= 36) && (single <= 61))
+		{
+			symbol = 'a' + single - 36;
+		}
+		else if (62 == single)
+		{
+			symbol = '+';
+		}
+		else if (63 == single)
+		{
+			symbol = '/';
+		}
+		// This should never happen
+		else
+		{
+			symbol = '?';
+		}
+
+		result += symbol;
+	}
+
+	return result;
+}
+
 void reload_container(TRMNLContainer& container, const string& filename)
 {
 	json j;
@@ -157,8 +207,7 @@ int main(int argc, char **argv)
 		if (trmnl->api_key().empty())
 		{
 			should_dump = true;
-			// TODO: Randomly generate key here
-			trmnl->api_key("nullptr");
+			trmnl->api_key(generate_api_key());
 		}
 
 		response["status"] = 200;