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283
backend/internal/service/usage_service.go
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283
backend/internal/service/usage_service.go
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package service
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import (
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"context"
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"errors"
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"fmt"
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"sub2api/internal/model"
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"sub2api/internal/repository"
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"time"
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"gorm.io/gorm"
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)
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var (
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ErrUsageLogNotFound = errors.New("usage log not found")
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)
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// CreateUsageLogRequest 创建使用日志请求
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type CreateUsageLogRequest struct {
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UserID int64 `json:"user_id"`
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ApiKeyID int64 `json:"api_key_id"`
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AccountID int64 `json:"account_id"`
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RequestID string `json:"request_id"`
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Model string `json:"model"`
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InputTokens int `json:"input_tokens"`
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OutputTokens int `json:"output_tokens"`
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CacheCreationTokens int `json:"cache_creation_tokens"`
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CacheReadTokens int `json:"cache_read_tokens"`
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CacheCreation5mTokens int `json:"cache_creation_5m_tokens"`
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CacheCreation1hTokens int `json:"cache_creation_1h_tokens"`
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InputCost float64 `json:"input_cost"`
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OutputCost float64 `json:"output_cost"`
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CacheCreationCost float64 `json:"cache_creation_cost"`
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CacheReadCost float64 `json:"cache_read_cost"`
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TotalCost float64 `json:"total_cost"`
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ActualCost float64 `json:"actual_cost"`
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RateMultiplier float64 `json:"rate_multiplier"`
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Stream bool `json:"stream"`
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DurationMs *int `json:"duration_ms"`
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}
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// UsageStats 使用统计
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type UsageStats struct {
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TotalRequests int64 `json:"total_requests"`
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TotalInputTokens int64 `json:"total_input_tokens"`
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TotalOutputTokens int64 `json:"total_output_tokens"`
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TotalCacheTokens int64 `json:"total_cache_tokens"`
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TotalTokens int64 `json:"total_tokens"`
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TotalCost float64 `json:"total_cost"`
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TotalActualCost float64 `json:"total_actual_cost"`
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AverageDurationMs float64 `json:"average_duration_ms"`
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}
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// UsageService 使用统计服务
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type UsageService struct {
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usageRepo *repository.UsageLogRepository
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userRepo *repository.UserRepository
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}
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// NewUsageService 创建使用统计服务实例
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func NewUsageService(usageRepo *repository.UsageLogRepository, userRepo *repository.UserRepository) *UsageService {
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return &UsageService{
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usageRepo: usageRepo,
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userRepo: userRepo,
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}
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}
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// Create 创建使用日志
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func (s *UsageService) Create(ctx context.Context, req CreateUsageLogRequest) (*model.UsageLog, error) {
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// 验证用户存在
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_, err := s.userRepo.GetByID(ctx, req.UserID)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrUserNotFound
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}
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return nil, fmt.Errorf("get user: %w", err)
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}
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// 创建使用日志
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usageLog := &model.UsageLog{
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UserID: req.UserID,
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ApiKeyID: req.ApiKeyID,
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AccountID: req.AccountID,
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RequestID: req.RequestID,
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Model: req.Model,
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InputTokens: req.InputTokens,
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OutputTokens: req.OutputTokens,
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CacheCreationTokens: req.CacheCreationTokens,
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CacheReadTokens: req.CacheReadTokens,
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CacheCreation5mTokens: req.CacheCreation5mTokens,
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CacheCreation1hTokens: req.CacheCreation1hTokens,
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InputCost: req.InputCost,
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OutputCost: req.OutputCost,
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CacheCreationCost: req.CacheCreationCost,
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CacheReadCost: req.CacheReadCost,
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TotalCost: req.TotalCost,
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ActualCost: req.ActualCost,
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RateMultiplier: req.RateMultiplier,
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Stream: req.Stream,
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DurationMs: req.DurationMs,
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}
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if err := s.usageRepo.Create(ctx, usageLog); err != nil {
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return nil, fmt.Errorf("create usage log: %w", err)
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}
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// 扣除用户余额
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if req.ActualCost > 0 {
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if err := s.userRepo.UpdateBalance(ctx, req.UserID, -req.ActualCost); err != nil {
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return nil, fmt.Errorf("update user balance: %w", err)
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}
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}
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return usageLog, nil
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}
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// GetByID 根据ID获取使用日志
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func (s *UsageService) GetByID(ctx context.Context, id int64) (*model.UsageLog, error) {
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log, err := s.usageRepo.GetByID(ctx, id)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrUsageLogNotFound
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}
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return nil, fmt.Errorf("get usage log: %w", err)
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}
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return log, nil
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}
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// ListByUser 获取用户的使用日志列表
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func (s *UsageService) ListByUser(ctx context.Context, userID int64, params repository.PaginationParams) ([]model.UsageLog, *repository.PaginationResult, error) {
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logs, pagination, err := s.usageRepo.ListByUser(ctx, userID, params)
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if err != nil {
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return nil, nil, fmt.Errorf("list usage logs: %w", err)
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}
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return logs, pagination, nil
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}
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// ListByApiKey 获取API Key的使用日志列表
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func (s *UsageService) ListByApiKey(ctx context.Context, apiKeyID int64, params repository.PaginationParams) ([]model.UsageLog, *repository.PaginationResult, error) {
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logs, pagination, err := s.usageRepo.ListByApiKey(ctx, apiKeyID, params)
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if err != nil {
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return nil, nil, fmt.Errorf("list usage logs: %w", err)
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}
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return logs, pagination, nil
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}
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// ListByAccount 获取账号的使用日志列表
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func (s *UsageService) ListByAccount(ctx context.Context, accountID int64, params repository.PaginationParams) ([]model.UsageLog, *repository.PaginationResult, error) {
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logs, pagination, err := s.usageRepo.ListByAccount(ctx, accountID, params)
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if err != nil {
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return nil, nil, fmt.Errorf("list usage logs: %w", err)
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}
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return logs, pagination, nil
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}
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// GetStatsByUser 获取用户的使用统计
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func (s *UsageService) GetStatsByUser(ctx context.Context, userID int64, startTime, endTime time.Time) (*UsageStats, error) {
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logs, _, err := s.usageRepo.ListByUserAndTimeRange(ctx, userID, startTime, endTime)
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if err != nil {
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return nil, fmt.Errorf("list usage logs: %w", err)
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}
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return s.calculateStats(logs), nil
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}
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// GetStatsByApiKey 获取API Key的使用统计
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func (s *UsageService) GetStatsByApiKey(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) (*UsageStats, error) {
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logs, _, err := s.usageRepo.ListByApiKeyAndTimeRange(ctx, apiKeyID, startTime, endTime)
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if err != nil {
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return nil, fmt.Errorf("list usage logs: %w", err)
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}
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return s.calculateStats(logs), nil
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}
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// GetStatsByAccount 获取账号的使用统计
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func (s *UsageService) GetStatsByAccount(ctx context.Context, accountID int64, startTime, endTime time.Time) (*UsageStats, error) {
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logs, _, err := s.usageRepo.ListByAccountAndTimeRange(ctx, accountID, startTime, endTime)
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if err != nil {
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return nil, fmt.Errorf("list usage logs: %w", err)
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}
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return s.calculateStats(logs), nil
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}
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// GetStatsByModel 获取模型的使用统计
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func (s *UsageService) GetStatsByModel(ctx context.Context, modelName string, startTime, endTime time.Time) (*UsageStats, error) {
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logs, _, err := s.usageRepo.ListByModelAndTimeRange(ctx, modelName, startTime, endTime)
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if err != nil {
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return nil, fmt.Errorf("list usage logs: %w", err)
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}
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return s.calculateStats(logs), nil
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}
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// GetDailyStats 获取每日使用统计（最近N天）
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func (s *UsageService) GetDailyStats(ctx context.Context, userID int64, days int) ([]map[string]interface{}, error) {
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endTime := time.Now()
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startTime := endTime.AddDate(0, 0, -days)
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logs, _, err := s.usageRepo.ListByUserAndTimeRange(ctx, userID, startTime, endTime)
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if err != nil {
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return nil, fmt.Errorf("list usage logs: %w", err)
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}
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// 按日期分组统计
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dailyStats := make(map[string]*UsageStats)
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for _, log := range logs {
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dateKey := log.CreatedAt.Format("2006-01-02")
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if _, exists := dailyStats[dateKey]; !exists {
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dailyStats[dateKey] = &UsageStats{}
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}
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stats := dailyStats[dateKey]
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stats.TotalRequests++
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stats.TotalInputTokens += int64(log.InputTokens)
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stats.TotalOutputTokens += int64(log.OutputTokens)
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stats.TotalCacheTokens += int64(log.CacheCreationTokens + log.CacheReadTokens)
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stats.TotalTokens += int64(log.TotalTokens())
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stats.TotalCost += log.TotalCost
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stats.TotalActualCost += log.ActualCost
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if log.DurationMs != nil {
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stats.AverageDurationMs += float64(*log.DurationMs)
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}
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}
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// 计算平均值并转换为数组
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result := make([]map[string]interface{}, 0, len(dailyStats))
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for date, stats := range dailyStats {
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if stats.TotalRequests > 0 {
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stats.AverageDurationMs /= float64(stats.TotalRequests)
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}
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result = append(result, map[string]interface{}{
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"date": date,
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"total_requests": stats.TotalRequests,
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"total_input_tokens": stats.TotalInputTokens,
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"total_output_tokens": stats.TotalOutputTokens,
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"total_cache_tokens": stats.TotalCacheTokens,
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"total_tokens": stats.TotalTokens,
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"total_cost": stats.TotalCost,
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"total_actual_cost": stats.TotalActualCost,
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"average_duration_ms": stats.AverageDurationMs,
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})
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}
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return result, nil
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}
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// calculateStats 计算统计数据
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func (s *UsageService) calculateStats(logs []model.UsageLog) *UsageStats {
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stats := &UsageStats{}
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for _, log := range logs {
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stats.TotalRequests++
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stats.TotalInputTokens += int64(log.InputTokens)
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stats.TotalOutputTokens += int64(log.OutputTokens)
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stats.TotalCacheTokens += int64(log.CacheCreationTokens + log.CacheReadTokens)
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stats.TotalTokens += int64(log.TotalTokens())
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stats.TotalCost += log.TotalCost
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stats.TotalActualCost += log.ActualCost
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if log.DurationMs != nil {
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stats.AverageDurationMs += float64(*log.DurationMs)
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}
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}
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// 计算平均持续时间
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if stats.TotalRequests > 0 {
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stats.AverageDurationMs /= float64(stats.TotalRequests)
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}
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return stats
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}
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// Delete 删除使用日志（管理员功能，谨慎使用）
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func (s *UsageService) Delete(ctx context.Context, id int64) error {
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if err := s.usageRepo.Delete(ctx, id); err != nil {
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return fmt.Errorf("delete usage log: %w", err)
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}
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return nil
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}
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