feat: select database from environment variable

Author: barahouei

README.md

@@ -44,8 +44,6 @@ Libraries or functions that help to maintain and improve the application.
 
 Databases and their functionalities.
 
-No business logic should be implemented here, just simple `CRUD`.
-
 ## /services
 
 Services that application provides.

cmd/commands.go

@@ -13,6 +13,9 @@ import (
 	"github.com/barahouei/clean-architecture-telegram-bot/handlers/bot"
 	"github.com/barahouei/clean-architecture-telegram-bot/models"
 	"github.com/barahouei/clean-architecture-telegram-bot/pkg/logger/zap"
+	"github.com/barahouei/clean-architecture-telegram-bot/repositories"
+	"github.com/barahouei/clean-architecture-telegram-bot/repositories/mongodb"
+	"github.com/barahouei/clean-architecture-telegram-bot/repositories/mysql"
 	"github.com/barahouei/clean-architecture-telegram-bot/repositories/postgres"
 	"github.com/urfave/cli/v2"
 	"go.uber.org/zap/zapcore"
@@ -64,12 +67,32 @@ func serve(c *cli.Context) error {
 
 	ctx := context.TODO()
 
-	db, err := postgres.New(ctx, cfg.Postgres, logger)
-	if err != nil {
-		logger.Error(err)
+	var db repositories.DB
 
-		return err
+	switch cfg.App.Driver {
+	case "postgres":
+		db, err = postgres.New(ctx, cfg.Postgres, logger)
+		if err != nil {
+			logger.Error(err)
+
+			return err
+		}
+	case "mysql":
+		db, err = mysql.New(ctx, cfg.MySQL, logger)
+		if err != nil {
+			logger.Error(err)
+
+			return err
+		}
+	case "mongodb":
+		db, err = mongodb.New(ctx, cfg.MongoDB, logger)
+		if err != nil {
+			logger.Error(err)
+
+			return err
+		}
 	}
+
 	defer db.Close(ctx)
 
 	bot := bot.New(db, logger)

configs/.env

@@ -1,5 +1,6 @@
 BOT_NAME=cleanBot
 BOT_APITOKEN=something
+BOT_DB_DRIVER=postgres
 
 BOT_POSTGRES_HOST=localhost
 BOT_POSTGRES_PORT=5432

configs/config.go

@@ -17,8 +17,9 @@ type (
 	}
 
 	App struct {
-		Name  string `env:"BOT_NAME,required"`
-		Token string `env:"BOT_APITOKEN,required"`
+		Name   string `env:"BOT_NAME,required"`
+		Token  string `env:"BOT_APITOKEN,required"`
+		Driver string `env:"BOT_DB_DRIVER,required"`
 	}
 
 	Postgres struct {