-

user/internal/config/config.go

@@ -0,0 +1,166 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/joho/godotenv"
+)
+
+// ConfigProvider defines the interface for configuration operations
+type ConfigProvider interface {
+	GetString(key string) string
+	GetInt(key string) int
+	GetBool(key string) bool
+	GetDuration(key string) time.Duration
+	IsSet(key string) bool
+	Validate() error
+	GetDatabaseDSN() string
+	GetDatabaseDSNForLogging() string
+	GetServerAddress() string
+	IsProduction() bool
+}
+
+// Config implements the ConfigProvider interface
+type Config struct {
+	defaults map[string]string
+}
+
+// NewConfig creates a new configuration instance
+func NewConfig() ConfigProvider {
+	// Load .env file if it exists
+	_ = godotenv.Load()
+
+	return &Config{
+		defaults: map[string]string{
+			"SERVER_HOST":            "0.0.0.0",
+			"SERVER_PORT":            "8090",
+			"SERVER_READ_TIMEOUT":    "30s",
+			"SERVER_WRITE_TIMEOUT":   "30s",
+			"SERVER_IDLE_TIMEOUT":    "60s",
+			"DB_HOST":                "localhost",
+			"DB_PORT":                "5432",
+			"DB_NAME":                "users",
+			"DB_USER":                "postgres",
+			"DB_PASSWORD":            "postgres",
+			"DB_SSLMODE":             "disable",
+			"DB_MAX_OPEN_CONNS":      "25",
+			"DB_MAX_IDLE_CONNS":      "5",
+			"DB_CONN_MAX_LIFETIME":   "5m",
+			"APP_ENV":                "development",
+			"APP_VERSION":            "1.0.0",
+			"LOG_LEVEL":              "debug",
+			"RATE_LIMIT_ENABLED":     "true",
+			"RATE_LIMIT_RPS":         "100",
+			"RATE_LIMIT_BURST":       "200",
+			"AUTH_PROVIDER":          "header",
+			"AUTH_HEADER_USER_EMAIL": "X-User-Email",
+		},
+	}
+}
+
+func (c *Config) GetString(key string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return c.defaults[key]
+}
+
+func (c *Config) GetInt(key string) int {
+	value := c.GetString(key)
+	if value == "" {
+		return 0
+	}
+
+	intVal, err := strconv.Atoi(value)
+	if err != nil {
+		return 0
+	}
+	return intVal
+}
+
+func (c *Config) GetBool(key string) bool {
+	value := strings.ToLower(c.GetString(key))
+	return value == "true" || value == "1"
+}
+
+func (c *Config) GetDuration(key string) time.Duration {
+	value := c.GetString(key)
+	if value == "" {
+		return 0
+	}
+
+	duration, err := time.ParseDuration(value)
+	if err != nil {
+		return 0
+	}
+	return duration
+}
+
+func (c *Config) IsSet(key string) bool {
+	return os.Getenv(key) != "" || c.defaults[key] != ""
+}
+
+func (c *Config) Validate() error {
+	required := []string{
+		"SERVER_HOST",
+		"SERVER_PORT",
+		"DB_HOST",
+		"DB_PORT",
+		"DB_NAME",
+		"DB_USER",
+		"DB_PASSWORD",
+	}
+
+	var missing []string
+	for _, key := range required {
+		if c.GetString(key) == "" {
+			missing = append(missing, key)
+		}
+	}
+
+	if len(missing) > 0 {
+		return fmt.Errorf("missing required configuration keys: %s", strings.Join(missing, ", "))
+	}
+
+	return nil
+}
+
+func (c *Config) GetDatabaseDSN() string {
+	host := c.GetString("DB_HOST")
+	port := c.GetString("DB_PORT")
+	user := c.GetString("DB_USER")
+	password := c.GetString("DB_PASSWORD")
+	dbname := c.GetString("DB_NAME")
+	sslmode := c.GetString("DB_SSLMODE")
+
+	// Debug logging to see what values we're getting
+	// fmt.Printf("DEBUG DSN VALUES: host=%s port=%s user=%s password=%s dbname=%s sslmode=%s\n",
+	// 	host, port, user, password, dbname, sslmode)
+
+	dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=%s",
+		host, port, user, password, dbname, sslmode)
+
+	return dsn
+}
+
+func (c *Config) GetDatabaseDSNForLogging() string {
+	return fmt.Sprintf("host=%s port=%s user=%s dbname=%s sslmode=%s",
+		c.GetString("DB_HOST"),
+		c.GetString("DB_PORT"),
+		c.GetString("DB_USER"),
+		c.GetString("DB_NAME"),
+		c.GetString("DB_SSLMODE"),
+	)
+}
+
+func (c *Config) GetServerAddress() string {
+	return fmt.Sprintf("%s:%s", c.GetString("SERVER_HOST"), c.GetString("SERVER_PORT"))
+}
+
+func (c *Config) IsProduction() bool {
+	return strings.ToLower(c.GetString("APP_ENV")) == "production"
+}