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

mengyastore-backend/internal/database/db.go

@@ -0,0 +1,45 @@
+package database
+
+import (
+	"log"
+	"time"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+// Open initialises a GORM DB connection and runs AutoMigrate for all models.
+func Open(dsn string) (*gorm.DB, error) {
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Warn),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	sqlDB, err := db.DB()
+	if err != nil {
+		return nil, err
+	}
+	sqlDB.SetMaxIdleConns(5)
+	sqlDB.SetMaxOpenConns(20)
+	sqlDB.SetConnMaxLifetime(time.Hour)
+
+	if err := autoMigrate(db); err != nil {
+		return nil, err
+	}
+	log.Println("[DB] 数据库连接成功，表结构已同步")
+	return db, nil
+}
+
+func autoMigrate(db *gorm.DB) error {
+	return db.AutoMigrate(
+		&ProductRow{},
+		&ProductCodeRow{},
+		&OrderRow{},
+		&SiteSettingRow{},
+		&WishlistRow{},
+		&ChatMessageRow{},
+	)
+}

mengyastore-backend/internal/database/models.go

@@ -0,0 +1,121 @@
+package database
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+// StringSlice is a JSON-serialized string slice stored as a MySQL TEXT/JSON column.
+type StringSlice []string
+
+func (s StringSlice) Value() (driver.Value, error) {
+	if s == nil {
+		return "[]", nil
+	}
+	b, err := json.Marshal(s)
+	return string(b), err
+}
+
+func (s *StringSlice) Scan(src any) error {
+	var raw []byte
+	switch v := src.(type) {
+	case string:
+		raw = []byte(v)
+	case []byte:
+		raw = v
+	default:
+		return fmt.Errorf("StringSlice: unsupported type %T", src)
+	}
+	return json.Unmarshal(raw, s)
+}
+
+// ─── Products ────────────────────────────────────────────────────────────────
+
+// ProductRow is the GORM model for the `products` table.
+type ProductRow struct {
+	ID              string      `gorm:"primaryKey;size:36"`
+	Name            string      `gorm:"size:255;not null"`
+	Price           float64     `gorm:"not null;default:0"`
+	DiscountPrice   float64     `gorm:"default:0"`
+	Tags            StringSlice `gorm:"type:json"`
+	CoverURL        string      `gorm:"size:500"`
+	ScreenshotURLs  StringSlice `gorm:"type:json"`
+	VerificationURL string      `gorm:"size:500;default:''"`
+	Description     string      `gorm:"type:text"`
+	Active          bool        `gorm:"default:true;index"`
+	RequireLogin    bool        `gorm:"default:false"`
+	MaxPerAccount   int         `gorm:"default:0"`
+	TotalSold       int         `gorm:"default:0"`
+	ViewCount       int         `gorm:"default:0"`
+	DeliveryMode    string      `gorm:"size:20;default:'auto'"`
+	ShowNote        bool        `gorm:"default:false"`
+	ShowContact     bool        `gorm:"default:false"`
+	CreatedAt       time.Time   `gorm:"index"`
+}
+
+func (ProductRow) TableName() string { return "products" }
+
+// ProductCodeRow stores individual codes for a product (one row per code).
+type ProductCodeRow struct {
+	ID        uint   `gorm:"primaryKey;autoIncrement"`
+	ProductID string `gorm:"size:36;not null;index"`
+	Code      string `gorm:"type:text;not null"`
+}
+
+func (ProductCodeRow) TableName() string { return "product_codes" }
+
+// ─── Orders ──────────────────────────────────────────────────────────────────
+
+type OrderRow struct {
+	ID             string      `gorm:"primaryKey;size:36"`
+	ProductID      string      `gorm:"size:36;not null;index"`
+	ProductName    string      `gorm:"size:255;not null"`
+	UserAccount    string      `gorm:"size:255;index"`
+	UserName       string      `gorm:"size:255"`
+	Quantity       int         `gorm:"not null;default:1"`
+	DeliveredCodes StringSlice `gorm:"type:json"`
+	Status         string      `gorm:"size:20;not null;default:'pending';index"`
+	DeliveryMode   string      `gorm:"size:20;default:'auto'"`
+	Note           string      `gorm:"type:text"`
+	ContactPhone   string      `gorm:"size:50"`
+	ContactEmail   string      `gorm:"size:255"`
+	NotifyEmail    string      `gorm:"size:255"`
+	CreatedAt      time.Time
+}
+
+func (OrderRow) TableName() string { return "orders" }
+
+// ─── Site settings ───────────────────────────────────────────────────────────
+
+// SiteSettingRow stores arbitrary key-value pairs for site-wide settings.
+type SiteSettingRow struct {
+	Key   string `gorm:"primaryKey;size:64"`
+	Value string `gorm:"type:text"`
+}
+
+func (SiteSettingRow) TableName() string { return "site_settings" }
+
+// ─── Wishlists ───────────────────────────────────────────────────────────────
+
+type WishlistRow struct {
+	ID        uint   `gorm:"primaryKey;autoIncrement"`
+	AccountID string `gorm:"size:255;not null;index:idx_wishlist,unique"`
+	ProductID string `gorm:"size:36;not null;index:idx_wishlist,unique"`
+}
+
+func (WishlistRow) TableName() string { return "wishlists" }
+
+// ─── Chat messages ───────────────────────────────────────────────────────────
+
+type ChatMessageRow struct {
+	ID          string    `gorm:"primaryKey;size:36"`
+	AccountID   string    `gorm:"size:255;not null;index"`
+	AccountName string    `gorm:"size:255"`
+	Content     string    `gorm:"type:text;not null"`
+	SentAt      time.Time `gorm:"not null"`
+	FromAdmin   bool      `gorm:"default:false"`
+}
+
+func (ChatMessageRow) TableName() string { return "chat_messages" }