feat: add asset level models

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/pkg/models/asset_level.go

@@ -0,0 +1,121 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// AssetLevel 藏品等级配置
+type AssetLevel struct {
+	ID            int64  `gorm:"primaryKey;autoIncrement"`
+	Level         string `gorm:"type:varchar(10);unique;not null"`
+	LevelOrder    int    `gorm:"not null"`
+	HourlyRevenue int    `gorm:"not null"`
+	RequireHours  int    `gorm:"not null"`
+	RequireLikes  int    `gorm:"not null"`
+	IsInitial     bool   `gorm:"default:false"`
+	CreatedAt     int64  `gorm:"not null"`
+	UpdatedAt     int64  `gorm:"not null"`
+}
+
+func (AssetLevel) TableName() string { return "asset_levels" }
+
+// AssetLevelRecord 藏品等级记录
+type AssetLevelRecord struct {
+	ID                      int64  `gorm:"primaryKey;autoIncrement"`
+	AssetID                 int64  `gorm:"unique;not null"`
+	CurrentLevel            string `gorm:"type:varchar(10);not null;default:'N'"`
+	SeasonExhibitionHours   int    `gorm:"default:0;not null"`
+	SeasonLikes             int    `gorm:"default:0;not null"`
+	LifetimeExhibitionHours int    `gorm:"default:0;not null"`
+	LifetimeLikes           int    `gorm:"default:0;not null"`
+	SeasonID                string `gorm:"type:varchar(50)"`
+	UpdatedAt               int64  `gorm:"not null"`
+}
+
+func (AssetLevelRecord) TableName() string { return "asset_level_records" }
+
+// AssetLevelChangeLog 等级变化日志
+type AssetLevelChangeLog struct {
+	ID           int64  `gorm:"primaryKey;autoIncrement"`
+	AssetID      int64  `gorm:"not null;index"`
+	FromLevel    string `gorm:"type:varchar(10)"`
+	ToLevel      string `gorm:"type:varchar(10);not null"`
+	TriggerType  string `gorm:"type:varchar(20);not null"`
+	TriggerHours int    `gorm:"default:0"`
+	TriggerLikes int    `gorm:"default:0"`
+	ChangeReason string `gorm:"type:varchar(255)"`
+	CreatedAt    int64  `gorm:"not null;index"`
+}
+
+func (AssetLevelChangeLog) TableName() string { return "asset_level_change_logs" }
+
+// Season 赛季配置
+type Season struct {
+	ID            string `gorm:"primaryKey;type:varchar(50)"`
+	Name          string `gorm:"type:varchar(100);not null"`
+	DurationDays  int    `gorm:"not null;default:84"`
+	StartTime     int64  `gorm:"not null"`
+	EndTime       int64  `gorm:"not null"`
+	ResetStrategy string `gorm:"type:varchar(20);default:'percentage_decay'"`
+	ResetLevel    bool   `gorm:"default:true"`
+	Status        string `gorm:"type:varchar(20);default:'active'"`
+	CreatedAt     int64  `gorm:"not null"`
+	UpdatedAt     int64  `gorm:"not null"`
+}
+
+func (Season) TableName() string { return "seasons" }
+
+// CalculateEndTime 计算赛季结束时间
+func (s *Season) CalculateEndTime() int64 {
+	return s.StartTime + int64(s.DurationDays)*86400000
+}
+
+// BeforeCreate 创建前钩子
+func (s *Season) BeforeCreate(tx *gorm.DB) error {
+	now := time.Now().UnixMilli()
+	s.CreatedAt = now
+	s.UpdatedAt = now
+	s.EndTime = s.CalculateEndTime()
+	if s.Status == "" {
+		s.Status = "active"
+	}
+	return nil
+}
+
+// BeforeUpdate 更新前钩子
+func (s *Season) BeforeUpdate(tx *gorm.DB) error {
+	s.UpdatedAt = time.Now().UnixMilli()
+	s.EndTime = s.CalculateEndTime()
+	return nil
+}
+
+// SeasonDecayConfig 赛季降序百分比配置
+type SeasonDecayConfig struct {
+	ID              int64  `gorm:"primaryKey;autoIncrement"`
+	SeasonID        string `gorm:"type:varchar(50);not null;uniqueIndex:uk_season_level"`
+	Level           string `gorm:"type:varchar(10);not null;uniqueIndex:uk_season_level"`
+	PreservePercent int    `gorm:"not null;default:100"`
+	UpdatedAt       int64  `gorm:"not null"`
+}
+
+func (SeasonDecayConfig) TableName() string { return "season_decay_config" }
+
+// 等级常量
+const (
+	LevelN   = "N"
+	LevelR   = "R"
+	LevelSR  = "SR"
+	LevelSSR = "SSR"
+	LevelUR  = "UR"
+)
+
+// LevelOrderMap 等级顺序映射
+var LevelOrderMap = map[string]int{
+	LevelN:   1,
+	LevelR:   2,
+	LevelSR:  3,
+	LevelSSR: 4,
+	LevelUR:  5,
+}