feat: add local DB to save downloads

internal/config/config.go

@@ -1,5 +1,14 @@
 package config
 
+import (
+	"fmt"
+	"os"
+	"path"
+
+	"github.com/mathismqn/godeez/internal/utils"
+	"github.com/spf13/viper"
+)
+
 type Config struct {
 	ArlCookie string `mapstructure:"arl_cookie"`
 	SecretKey string `mapstructure:"secret_key"`
@@ -7,3 +16,57 @@ type Config struct {
 }
 
 var Cfg Config
+
+func Init(cfgFile string) {
+	if cfgFile != "" {
+		viper.SetConfigFile(cfgFile)
+	} else {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error: could not get home directory: %v\n", err)
+			os.Exit(1)
+		}
+
+		appDir := path.Join(homeDir, ".godeez")
+		if err := utils.EnsureDir(appDir); err != nil {
+			fmt.Fprintf(os.Stderr, "Error: could not create app directory: %v\n", err)
+			os.Exit(1)
+		}
+
+		cfgPath := path.Join(appDir, "config.toml")
+		if _, err := os.Stat(cfgPath); os.IsNotExist(err) {
+			fmt.Printf("Config file not found, creating one at %s\n", cfgPath)
+
+			content := []byte("arl_cookie = ''\nsecret_key = ''\niv = '0001020304050607'\n")
+			if err := os.WriteFile(cfgPath, content, 0644); err != nil {
+				fmt.Fprintf(os.Stderr, "Error: could not create config file: %v\n", err)
+				os.Exit(1)
+			}
+		}
+
+		viper.AddConfigPath(appDir)
+		viper.SetConfigName("config.toml")
+	}
+
+	viper.SetConfigType("toml")
+	viper.AutomaticEnv()
+	if err := viper.ReadInConfig(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: could not read config file: %v\n", err)
+		os.Exit(1)
+	}
+
+	cfg := &Cfg
+	if err := viper.Unmarshal(&cfg); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: could not unmarshal config file: %v\n", err)
+		os.Exit(1)
+	}
+
+	if cfg.SecretKey == "" {
+		fmt.Fprintln(os.Stderr, "Error: secret_key is not set in config file")
+		os.Exit(1)
+	}
+	if cfg.IV == "" {
+		fmt.Fprintln(os.Stderr, "Error: iv is not set in config file")
+		os.Exit(1)
+	}
+}