feat: major update - MySQL, chat, wishlist, PWA, admin overhaul

mengyastore-backend/internal/config/config.go

@@ -9,8 +9,18 @@ import (
 type Config struct {
 	AdminToken string `json:"adminToken"`
 	AuthAPIURL string `json:"authApiUrl"`
+
+	// Database DSN. If empty, falls back to the test DB DSN.
+	// Format: "user:pass@tcp(host:port)/dbname?charset=utf8mb4&parseTime=True&loc=Local"
+	DatabaseDSN string `json:"databaseDsn"`
 }
 
+// Default DSNs for each environment.
+const (
+	TestDSN = "mengyastore-test:mengyastore-test@tcp(10.1.1.100:3306)/mengyastore-test?charset=utf8mb4&parseTime=True&loc=Local"
+	ProdDSN = "mengyastore:mengyastore@tcp(192.168.1.100:3306)/mengyastore?charset=utf8mb4&parseTime=True&loc=Local"
+)
+
 func Load(path string) (*Config, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
@@ -23,5 +33,12 @@ func Load(path string) (*Config, error) {
 	if cfg.AdminToken == "" {
 		cfg.AdminToken = "shumengya520"
 	}
+	// Default to test DB if not configured; environment variable overrides config file.
+	if dsn := os.Getenv("DATABASE_DSN"); dsn != "" {
+		cfg.DatabaseDSN = dsn
+	}
+	if cfg.DatabaseDSN == "" {
+		cfg.DatabaseDSN = TestDSN
+	}
 	return &cfg, nil
 }