feat: 新增用户数据导出功能

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/UsageStatistics/DailyTokenUsageDto.cs

@@ -0,0 +1,17 @@
+namespace Yi.Framework.AiHub.Application.Contracts.Dtos.UsageStatistics;
+
+/// <summary>
+/// 每日Token使用量统计DTO
+/// </summary>
+public class DailyTokenUsageDto
+{
+    /// <summary>
+    /// 日期
+    /// </summary>
+    public DateTime Date { get; set; }
+    
+    /// <summary>
+    /// Token消耗量
+    /// </summary>
+    public long Tokens { get; set; }
+}

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/UsageStatistics/ModelTokenUsageDto.cs

@@ -0,0 +1,22 @@
+namespace Yi.Framework.AiHub.Application.Contracts.Dtos.UsageStatistics;
+
+/// <summary>
+/// 模型Token使用量统计DTO
+/// </summary>
+public class ModelTokenUsageDto
+{
+    /// <summary>
+    /// 模型ID
+    /// </summary>
+    public string Model { get; set; }
+    
+    /// <summary>
+    /// 总消耗量
+    /// </summary>
+    public long Tokens { get; set; }
+    
+    /// <summary>
+    /// 占比（百分比）
+    /// </summary>
+    public decimal Percentage { get; set; }
+}

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/IServices/IUsageStatisticsService.cs

@@ -0,0 +1,21 @@
+using Yi.Framework.AiHub.Application.Contracts.Dtos.UsageStatistics;
+
+namespace Yi.Framework.AiHub.Application.Contracts.IServices;
+
+/// <summary>
+/// 使用量统计服务接口
+/// </summary>
+public interface IUsageStatisticsService
+{
+    /// <summary>
+    /// 获取当前用户近7天的Token消耗统计
+    /// </summary>
+    /// <returns>每日Token使用量列表</returns>
+    Task<List<DailyTokenUsageDto>> GetLast7DaysTokenUsageAsync();
+    
+    /// <summary>
+    /// 获取当前用户各个模型的Token消耗量及占比
+    /// </summary>
+    /// <returns>模型Token使用量列表</returns>
+    Task<List<ModelTokenUsageDto>> GetModelTokenUsageAsync();
+}

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/UsageStatisticsService.cs

@@ -0,0 +1,105 @@
+using Microsoft.AspNetCore.Authorization;
+using SqlSugar;
+using Volo.Abp.Application.Services;
+using Volo.Abp.Users;
+using Yi.Framework.AiHub.Application.Contracts.Dtos.UsageStatistics;
+using Yi.Framework.AiHub.Application.Contracts.IServices;
+using Yi.Framework.AiHub.Domain.Entities;
+using Yi.Framework.AiHub.Domain.Entities.Chat;
+using Yi.Framework.SqlSugarCore.Abstractions;
+
+namespace Yi.Framework.AiHub.Application.Services;
+
+/// <summary>
+/// 使用量统计服务
+/// </summary>
+[Authorize]
+public class UsageStatisticsService : ApplicationService, IUsageStatisticsService
+{
+    private readonly ISqlSugarRepository<MessageAggregateRoot> _messageRepository;
+    private readonly ISqlSugarRepository<UsageStatisticsAggregateRoot> _usageStatisticsRepository;
+
+    public UsageStatisticsService(
+        ISqlSugarRepository<MessageAggregateRoot> messageRepository,
+        ISqlSugarRepository<UsageStatisticsAggregateRoot> usageStatisticsRepository)
+    {
+        _messageRepository = messageRepository;
+        _usageStatisticsRepository = usageStatisticsRepository;
+    }
+
+    /// <summary>
+    /// 获取当前用户近7天的Token消耗统计
+    /// </summary>
+    /// <returns>每日Token使用量列表</returns>
+    public async Task<List<DailyTokenUsageDto>> GetLast7DaysTokenUsageAsync()
+    {
+        var userId = CurrentUser.GetId();
+        var endDate = DateTime.Today;
+        var startDate = endDate.AddDays(-6); // 近7天
+
+        // 从Message表统计近7天的token消耗
+        var dailyUsage = await _messageRepository._DbQueryable
+            .Where(x => x.UserId == userId)
+            .Where(x => x.CreationTime >= startDate && x.CreationTime < endDate.AddDays(1))
+            .GroupBy(x => x.CreationTime.Date)
+            .Select(g => new
+            {
+                Date = g.CreationTime.Date,
+                Tokens = SqlFunc.AggregateCount(g.TokenUsage.TotalTokenCount)
+            })
+            .ToListAsync();
+
+        // 生成完整的7天数据，包括没有使用记录的日期
+        var result = new List<DailyTokenUsageDto>();
+        for (int i = 0; i < 7; i++)
+        {
+            var date = startDate.AddDays(i);
+            var usage = dailyUsage.FirstOrDefault(x => x.Date == date);
+
+            result.Add(new DailyTokenUsageDto
+            {
+                Date = date,
+                Tokens = usage?.Tokens ?? 0
+            });
+        }
+
+        return result.OrderBy(x => x.Date).ToList();
+    }
+
+    /// <summary>
+    /// 获取当前用户各个模型的Token消耗量及占比
+    /// </summary>
+    /// <returns>模型Token使用量列表</returns>
+    public async Task<List<ModelTokenUsageDto>> GetModelTokenUsageAsync()
+    {
+        var userId = CurrentUser.GetId();
+
+        // 从UsageStatistics表获取各模型的token消耗统计
+        var modelUsages = await _usageStatisticsRepository._DbQueryable
+            .Where(x => x.UserId == userId)
+            .Select(x => new
+            {
+                x.ModelId,
+                x.TotalTokenCount
+            })
+            .ToListAsync();
+
+        if (!modelUsages.Any())
+        {
+            return new List<ModelTokenUsageDto>();
+        }
+
+        // 计算总token数
+        var totalTokens = modelUsages.Sum(x => x.TotalTokenCount);
+
+        // 计算各模型占比
+        var result = modelUsages.Select(x => new ModelTokenUsageDto
+        {
+            Model = x.ModelId,
+            Tokens = x.TotalTokenCount,
+            Percentage = totalTokens > 0 ? Math.Round((decimal)x.TotalTokenCount / totalTokens * 100, 2) : 0
+        }).OrderByDescending(x => x.Tokens).ToList();
+
+        return result;
+    }
+}