Adding rewrite

pkg/config/config.go

@@ -0,0 +1,40 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+)
+
+// Config - This struct will hold configuration components.
+type Config struct {
+	TelegramToken  string `json:"telegramToken"`
+	TelegramChatID string `json:"telegramChatID"`
+}
+
+//GetConfig gets the configuration values for the api using the file in the supplied configPath.
+func GetConfig(configPath string) (Config, error) {
+	if _, err := os.Stat(configPath); os.IsNotExist(err) {
+		return Config{}, fmt.Errorf("could not find the config file at path %s", configPath)
+	}
+	log.Println("Loading Configuration File: " + configPath)
+	return loadConfigFromFile(configPath)
+}
+
+//if the config loaded from the file errors, no defaults will be loaded and the app will exit.
+func loadConfigFromFile(configPath string) (conf Config, err error) {
+	file, err := os.Open(configPath)
+	if err != nil {
+		log.Printf("Error opening config file: %v", err)
+	} else {
+		defer file.Close()
+
+		err = json.NewDecoder(file).Decode(&conf)
+		if err != nil {
+			log.Printf("Error decoding config file: %v", err)
+		}
+	}
+
+	return conf, err
+}