enhancement this repository

.gitignore

@@ -1,3 +1,7 @@
-config/config-local.yaml
+vendor/
 
-vendor/
+# we want to ignore files under this directory (ends with /*)
+.coverage/*
+
+# we want to keep track of this .keep files (starts with !)
+!.keep

cmd/api/main.go

@@ -2,21 +2,53 @@ package main
 
 import (
 	"context"
-	"os"
+	"time"
 
 	"github.com/DoWithLogic/golang-clean-architecture/config"
 	"github.com/DoWithLogic/golang-clean-architecture/internal/app"
+	"github.com/DoWithLogic/golang-clean-architecture/pkg/observability"
+	"github.com/labstack/gommon/log"
 )
 
 func main() {
-	env := os.Getenv("env")
-	if env == "" {
-		env = "local"
+	// Load the application configuration from the specified directory.
+	cfg, err := config.LoadConfig("config")
+	if err != nil {
+		// If an error occurs while loading the configuration, panic with the error.
+		panic(err)
 	}
 
-	cfg, err := config.LoadConfig(env)
+	// Set the time zone to the specified value from the configuration.
+	_, err = time.LoadLocation(cfg.Server.TimeZone)
 	if err != nil {
-		panic(err)
+		// If an error occurs while setting the time zone, log the error and exit the function.
+		log.Error("Error on setting the time zone: ", err)
+		return
+	}
+
+	// Initialize observability components if observability is enabled in the configuration.
+	if cfg.Observability.Enable {
+		// Initialize the tracer provider for distributed tracing.
+		tracer, err := observability.InitTracerProvider(cfg)
+		if err != nil {
+			log.Warn("Failed to initialize tracer: ", err)
+		}
+
+		// Initialize the meter provider for metrics collection.
+		meter, err := observability.InitMeterProvider(cfg)
+		if err != nil {
+			log.Warn("Failed to initialize meter: ", err)
+		}
+
+		// Ensure that the tracer and meter are shut down when the main function exits.
+		defer func() {
+			if tracer != nil {
+				tracer.Shutdown(context.Background())
+			}
+			if meter != nil {
+				meter.Shutdown(context.Background())
+			}
+		}()
 	}
 
 	app.NewApp(context.Background(), cfg).Run()

config/config-local.yaml

@@ -0,0 +1,26 @@
+App:
+  Name: "golang-clean-architecture"
+  Version: "v0.0.1"
+  Scheme: "http"
+  Host: "localhost:3002"
+  Environment: local #local,development,staging,production
+
+Server:
+  Port: "9090"
+  Debug: true
+  TimeZone: "Asia/Jakarta"
+
+
+Database: 
+  Host: 127.0.0.1
+  Port: 3306
+  Name: users
+  User: root
+  Password: pwd
+
+Authentication:
+  Key: DoWithLogic!@#
+
+Observability:
+  Enable: false
+  Mode: "otlp/http"

config/config.go

@@ -1,19 +1,41 @@
 package config
 
 import (
+	"errors"
 	"fmt"
-	"time"
+	"log"
+	"strings"
 
 	"github.com/spf13/viper"
 )
 
 type (
 	Config struct {
-		Database       DatabaseConfig
+		App            AppConfig
 		Server         ServerConfig
+		Database       DatabaseConfig
 		Authentication AuthenticationConfig
+		Observability  ObservabilityConfig
+		JWT            JWTConfig
+	}
+
+	// AppConfig holds the configuration related to the application settings.
+	AppConfig struct {
+		Name        string
+		Version     string
+		Schema      string
+		Host        string
+		Environment string
+	}
+
+	// ServerConfig holds the configuration for the server settings.
+	ServerConfig struct {
+		Port     string // The port on which the server will listen.
+		Debug    bool   // Indicates if debug mode is enabled.
+		TimeZone string // The time zone setting for the server.
 	}
 
+	// DatabaseConfig holds the configuration for the database connection.
 	DatabaseConfig struct {
 		Host     string
 		Port     int
@@ -22,37 +44,76 @@ type (
 		Password string
 	}
 
-	ServerConfig struct {
-		Name         string
-		Version      string
-		RPCPort      string
-		RESTPort     string
-		Debug        bool
-		Environment  string
-		ReadTimeout  time.Duration
-		WriteTimeout time.Duration
+	AuthenticationConfig struct {
+		Key string
 	}
 
-	AuthenticationConfig struct {
-		Key       string
-		SecretKey string
-		SaltKey   string
+	// ObservabilityConfig holds the configuration for observability settings.
+	ObservabilityConfig struct {
+		Enable bool   // Indicates if observability is enabled.
+		Mode   string // Specifies the observability mode.
+	}
+
+	JWTConfig struct {
+		Key     string
+		Expired int
+		Label   string
 	}
 )
 
-func LoadConfig(env string) (Config, error) {
-	viper.SetConfigFile(fmt.Sprintf("config/config-%s.yaml", env))
+// LoadConfig loads the configuration from the specified filename.
+func LoadConfig(filename string) (Config, error) {
+	// Create a new Viper instance.
+	v := viper.New()
 
-	if err := viper.ReadInConfig(); err != nil {
+	// Set the configuration file name, path, and environment variable settings.
+	v.SetConfigName(fmt.Sprintf("config/%s", filename))
+	v.AddConfigPath(".")
+	v.AutomaticEnv()
+	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	// Read the configuration file.
+	if err := v.ReadInConfig(); err != nil {
 		fmt.Printf("Error reading config file: %v\n", err)
 		return Config{}, err
 	}
 
+	// Unmarshal the configuration into the Config struct.
 	var config Config
-	if err := viper.Unmarshal(&config); err != nil {
+	if err := v.Unmarshal(&config); err != nil {
 		fmt.Printf("Error unmarshaling config: %v\n", err)
 		return Config{}, err
 	}
 
 	return config, nil
 }
+
+// LoadConfigPath loads the configuration from the specified path.
+func LoadConfigPath(path string) (Config, error) {
+	// Create a new Viper instance.
+	v := viper.New()
+
+	// Set the configuration file name, path, and environment variable settings.
+	v.SetConfigName(path)
+	v.AddConfigPath(".")
+	v.AutomaticEnv()
+	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	// Read the configuration file.
+	if err := v.ReadInConfig(); err != nil {
+		// Handle the case where the configuration file is not found.
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			return Config{}, errors.New("config file not found")
+		}
+		return Config{}, err
+	}
+
+	// Parse the configuration into the Config struct.
+	var c Config
+	if err := v.Unmarshal(&c); err != nil {
+		log.Printf("unable to decode into struct, %v", err)
+		return Config{}, err
+	}
+
+	return c, nil
+}

config/config.yaml

@@ -0,0 +1,26 @@
+App:
+  Name: "golang-clean-architecture"
+  Version: "v0.0.1"
+  Scheme: "http"
+  Host: "localhost:3002"
+  Environment: local #local,development,staging,production
+
+Server:
+  Port: "9090"
+  Debug: true
+  TimeZone: "Asia/Jakarta"
+
+
+Database: 
+  Host: 127.0.0.1
+  Port: 3306
+  Name: users
+  User: root
+  Password: pwd
+
+Authentication:
+  Key: DoWithLogic!@#
+
+Observability:
+  Enable: false
+  Mode: "otlp/http"

database/mysql/migration/20230924142159_add_user_table.sql

@@ -9,9 +9,7 @@ CREATE TABLE `users` (
   `user_type` varchar(50) NOT NULL,
   `is_active` tinyint(1) NOT NULL,
   `created_at` timestamp NOT NULL,
-  `created_by` varchar(255) NOT NULL,
   `updated_at` timestamp DEFAULT NULL,
-  `updated_by` varchar(255) DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
 

docker-compose.yml

@@ -17,14 +17,7 @@ services:
       interval: 0.5s
       timeout: 10s
       retries: 10
-  golang-clean-architecture:
-    build:
-      context: .
-      dockerfile: Dockerfile # Specify the path to your Dockerfile
-    ports:
-      - 8080:8080
-      - 9090:9090
-    volumes:
-      - ./config/config-local.yaml:/app/config/config-local.yaml
-    depends_on:
-      - mysql-db
+    entrypoint: 
+      sh -c "
+        echo 'CREATE DATABASE IF NOT EXISTS users;' > /docker-entrypoint-initdb.d/init.sql;
+        /usr/local/bin/docker-entrypoint.sh --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci"