完成了“后台审计日志”

backend/internal/modules/adminaudit/repository.go

@@ -0,0 +1,81 @@
+package adminaudit
+
+import (
+	"time"
+
+	"gorm.io/datatypes"
+	"gorm.io/gorm"
+)
+
+type Repository struct {
+	db *gorm.DB
+}
+
+func NewRepository(db *gorm.DB) *Repository {
+	return &Repository{db: db}
+}
+
+func (r *Repository) List(query Query) ([]LogDTO, error) {
+	limit := query.Limit
+	if limit <= 0 || limit > 500 {
+		limit = 200
+	}
+
+	db := r.db.Table("audit_logs AS al").
+		Select(`al.id, al.actor_type, al.actor_id, COALESCE(au.username, '') AS actor_username,
+			COALESCE(au.nickname, '') AS actor_nickname, al.action, al.biz_type, al.biz_id,
+			al.ip, al.user_agent, al.detail, al.created_at`).
+		Joins("LEFT JOIN admin_users AS au ON au.id = al.actor_id AND al.actor_type = ?", "admin")
+
+	if query.ActorID > 0 {
+		db = db.Where("al.actor_id = ?", query.ActorID)
+	}
+	if query.Action != "" {
+		db = db.Where("al.action = ?", query.Action)
+	}
+	if query.BizType != "" {
+		db = db.Where("al.biz_type = ?", query.BizType)
+	}
+
+	var rows []auditLogRow
+	if err := db.Order("al.id DESC").Limit(limit).Scan(&rows).Error; err != nil {
+		return nil, err
+	}
+	items := make([]LogDTO, 0, len(rows))
+	for _, row := range rows {
+		items = append(items, row.toDTO())
+	}
+	return items, nil
+}
+
+type auditLogRow struct {
+	ID            uint64
+	ActorType     string
+	ActorID       uint64
+	ActorUsername string
+	ActorNickname string
+	Action        string
+	BizType       string
+	BizID         *uint64
+	IP            string
+	UserAgent     string
+	Detail        datatypes.JSON
+	CreatedAt     time.Time
+}
+
+func (row auditLogRow) toDTO() LogDTO {
+	return LogDTO{
+		ID:            row.ID,
+		ActorType:     row.ActorType,
+		ActorID:       row.ActorID,
+		ActorUsername: row.ActorUsername,
+		ActorNickname: row.ActorNickname,
+		Action:        row.Action,
+		BizType:       row.BizType,
+		BizID:         row.BizID,
+		IP:            row.IP,
+		UserAgent:     row.UserAgent,
+		Detail:        row.Detail,
+		CreatedAt:     row.CreatedAt,
+	}
+}