搭建用户体系

backend/internal/config/config.go

@@ -0,0 +1,64 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	DatabaseURL        string
+	JWTSecret          string
+	JWTExpirationHours int
+	Port               string
+	AllowedOrigins     []string
+}
+
+func Load() (*Config, error) {
+	_ = godotenv.Load()
+
+	databaseURL := os.Getenv("DATABASE_URL")
+	if databaseURL == "" {
+		return nil, fmt.Errorf("DATABASE_URL must be set")
+	}
+
+	jwtSecret := os.Getenv("JWT_SECRET")
+	if jwtSecret == "" {
+		jwtSecret = "change-me-in-production"
+		fmt.Fprintln(os.Stderr, "WARNING: JWT_SECRET not set, using default secret")
+	}
+
+	expHours, _ := strconv.Atoi(os.Getenv("JWT_EXPIRATION_HOURS"))
+	if expHours == 0 {
+		expHours = 168 // 7 days
+	}
+
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "3019"
+	}
+
+	allowedOrigins := []string{"*"}
+	if v := os.Getenv("ALLOWED_ORIGINS"); v != "" {
+		allowedOrigins = strings.Split(v, ",")
+		for i := range allowedOrigins {
+			allowedOrigins[i] = strings.TrimSpace(allowedOrigins[i])
+		}
+	}
+
+	return &Config{
+		DatabaseURL:        databaseURL,
+		JWTSecret:          jwtSecret,
+		JWTExpirationHours: expHours,
+		Port:               port,
+		AllowedOrigins:     allowedOrigins,
+	}, nil
+}
+
+func (c *Config) JWTExpiration() time.Duration {
+	return time.Duration(c.JWTExpirationHours) * time.Hour
+}