add go modules

util/config.go

@@ -0,0 +1,34 @@
+package util
+
+import (
+	"encoding/json"
+	"flag"
+	"io/ioutil"
+	"log"
+)
+
+type Config struct {
+	Title           string `json:"title"`
+	FpsLimit        int    `json:"fpsLimit, omitempty" validate:"required"`
+	Version         string `json:"version"`
+	MainWindowSizeX int    `json:"sizeX"`
+	MainWindowSizeY int    `json:"sizeY"`
+}
+
+func LoadConfig() *Config {
+	var configArg string = "./config.json"
+	flag.StringVar(&configArg, "cfg", configArg, "config file location")
+	flag.Parse()
+
+	// get config
+	data, err := ioutil.ReadFile(configArg)
+	if err != nil {
+		log.Fatalf("Application couldn't read config at %s", configArg)
+	}
+	config := new(Config)
+	err = json.Unmarshal(data, config)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	return config
+}