add json

README.md

@@ -29,11 +29,13 @@ Usage: ./robo-server [OPTIONS]
 | -m,--max-players         | UINT:INT in [2 - 4]=4         | the maximum players of the game              |
 | -p,--port                | UINT=1113                     | port to connect to                           |
 | -s,--not-shoot-and-move  | FLAG                          | Robot can not shoot while it is moving       |
+| -j,--json-config         | TEXT:FILE                     | JSON Configuration for port, max-player, ... |
 
 ## verwendete Software
 * [asio](https://think-async.com/Asio/)
 * [CLI11](https://github.com/CLIUtils/CLI11)
 * [fmt](https://github.com/fmtlib/fmt)
+* [json](https://github.com/nlohmann/json)
 * [spdlog](https://github.com/gabime/spdlog)
 
 * [protocol-buffers](https://developers.google.com/protocol-buffers/)

configs/config.json

@@ -0,0 +1,4 @@
+{
+    "max-players": 2,
+    "not-shoot-and-move": true
+}

meson.build

@@ -18,6 +18,9 @@ add_global_arguments('-I' + get_option('cli11_include_dir'), language : 'cpp')
 # spdlog: https://github.com/gabime/spdlog
 add_global_arguments('-I' + get_option('spdlog_include_dir'), language : 'cpp')
 
+# json: https://github.com/nlohmann/json
+add_global_arguments('-I' + get_option('json_include_dir'), language : 'cpp')
+
 # begin protobuf: https://developers.google.com/protocol-buffers/
 protoc = find_program('protoc', required : true)
 protobuf_dep = dependency('protobuf', required : true)

meson_options.txt

@@ -1,4 +1,5 @@
 option('asio_include_dir', type : 'string', value : '/home/michael/asio/asio/include/', description : 'the include dir of asio')
+option('json_include_dir', type : 'string', value : '/home/michael/', description : 'the include dir of json')
 option('cli11_include_dir', type : 'string', value : '/home/michael/', description : 'the dir containing CLI11.hpp')
 option('criterion_include_dir', type : 'string', value : '', description : 'the dir containing criterion.hpp')
 option('spdlog_include_dir', type : 'string', value : '/home/michael/spdlog/include/', description : 'the include dir of spdlog')

src/server_src/main.cpp

@@ -9,6 +9,7 @@
 #include "robotProperties.pb.h"
 #include "grpcServer.h"
 
+#include "json.hpp"
 #include "asio.hpp"
 #include "CLI11.hpp"
 #include <SFML/Graphics.hpp>
@@ -26,6 +27,16 @@
 using namespace std;
 using namespace asio;
 using namespace asio::ip;
+using json = nlohmann::json;
+
+auto throwValidationError(const CLI::App &app, const string &error) {
+    try {
+        spdlog::error(error);
+        throw CLI::ValidationError(error);
+    } catch (const CLI::Error &e) {
+        return app.exit(e);
+    }
+}
 
 int main(int argc, char* argv[]) {
     GOOGLE_PROTOBUF_VERIFY_VERSION;
@@ -68,8 +79,34 @@ int main(int argc, char* argv[]) {
     bool canNotShootAndMove{};
     app.add_flag("-s,--not-shoot-and-move", canNotShootAndMove, "Robot can not shoot while it is moving");
 
+    string jsonConfigPath;
+    app.add_option("-j,--json-config", jsonConfigPath, "JSON Configuration for port, max-player and not-shoot-and-move")->check(CLI::ExistingFile);
+
     CLI11_PARSE(app, argc, argv);
 
+    std::ifstream i(jsonConfigPath);
+    json jsonConfig;
+    i >> jsonConfig;
+
+    if (jsonConfig.contains("max-players")) {
+        if (jsonConfig["max-players"].is_number()) {
+            if(jsonConfig["max-players"] >= 2 and jsonConfig["max-players"] <= 4) {
+                maxPlayers = jsonConfig["max-players"];
+            } else {
+                return throwValidationError(app, "max-players must be between 2 and 4");
+            }
+        } else {
+            return throwValidationError(app, "max-players must be a number");
+        }
+    }
+    if (jsonConfig.contains("not-shoot-and-move")) {
+        if (jsonConfig["not-shoot-and-move"].is_boolean()) {
+            canNotShootAndMove = jsonConfig["not-shoot-and-move"];
+        } else {
+            return throwValidationError(app, "not-shoot-and-move must be a boolean flag");
+        }
+    }
+
     auto file_logger = spdlog::rotating_logger_mt("file_logger", "../logs/server.log", 1048576 * 5, 3);
     spdlog::set_default_logger(file_logger);
     spdlog::set_pattern("[%Y %m %d %H:%M:%S,%e] [%l] %v");