build multi tenant

config/config.go

@@ -0,0 +1,95 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+// Config holds all configuration for the application
+type Config struct {
+	Database DatabaseConfig
+	Auth     AuthConfig
+	App      AppConfig
+}
+
+// DatabaseConfig holds database configuration
+type DatabaseConfig struct {
+	Host     string
+	Port     int
+	User     string
+	Password string
+	DBName   string
+	SSLMode  string
+}
+
+// AuthConfig holds authentication configuration
+type AuthConfig struct {
+	JWTSecret       string
+	SessionDuration int // in hours
+}
+
+// AppConfig holds general application configuration
+type AppConfig struct {
+	Environment string
+	LogLevel    string
+}
+
+// Load loads configuration from environment variables and .env file
+func Load() (*Config, error) {
+	// Load .env file if it exists
+	_ = godotenv.Load()
+
+	config := &Config{
+		Database: DatabaseConfig{
+			Host:     getEnv("DB_HOST", "localhost"),
+			Port:     getEnvAsInt("DB_PORT", 5432),
+			User:     getEnv("DB_USER", "postgres"),
+			Password: getEnv("DB_PASSWORD", ""),
+			DBName:   getEnv("DB_NAME", "geeklife"),
+			SSLMode:  getEnv("DB_SSLMODE", "disable"),
+		},
+		Auth: AuthConfig{
+			JWTSecret:       getEnv("JWT_SECRET", "your-secret-key-change-this"),
+			SessionDuration: getEnvAsInt("SESSION_DURATION", 24),
+		},
+		App: AppConfig{
+			Environment: getEnv("ENVIRONMENT", "development"),
+			LogLevel:    getEnv("LOG_LEVEL", "info"),
+		},
+	}
+
+	return config, nil
+}
+
+// GetDSN returns the database connection string
+func (c *Config) GetDSN() string {
+	return fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
+		c.Database.Host,
+		c.Database.Port,
+		c.Database.User,
+		c.Database.Password,
+		c.Database.DBName,
+		c.Database.SSLMode,
+	)
+}
+
+// getEnv gets an environment variable with a fallback value
+func getEnv(key, fallback string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return fallback
+}
+
+// getEnvAsInt gets an environment variable as integer with a fallback value
+func getEnvAsInt(key string, fallback int) int {
+	if value := os.Getenv(key); value != "" {
+		if intVal, err := strconv.Atoi(value); err == nil {
+			return intVal
+		}
+	}
+	return fallback
+}