Concern separation

config.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"encoding/json"
+	"os"
+)
+
+type Config struct {
+	MemorySize      int    `json:"memory_size"`
+	MessagePerHour  int    `json:"messages_per_hour"`
+	MessagePerDay   int    `json:"messages_per_day"`
+	TempBanDuration string `json:"temp_ban_duration"`
+}
+
+func loadConfig(filename string) (Config, error) {
+	var config Config
+	file, err := os.Open(filename)
+	if err != nil {
+		return config, err
+	}
+	defer file.Close()
+
+	decoder := json.NewDecoder(file)
+	err = decoder.Decode(&config)
+	return config, err
+}