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refactor: 完全清空後端複習系統為重新實施做準備 

- 刪除所有智能複習相關服務和控制器
- 移除 StudyController, StudySessionController
- 刪除 SpacedRepetitionService, ReviewTypeSelectorService 等服務
- 清理 SpacedRepetition DTO 和配置文件
- 簡化 Flashcard 實體，移除所有複習相關屬性
- 移除 StudyRecord, StudySession, StudyCard 實體
- 清理 Program.cs 服務註冊和 appsettings 配置
- 為組件化重新實施提供純淨的代碼基礎

清空效果:
- StudyController: 583行 → 0行 (完全刪除)
- FlashcardsController: 461行 → 271行 (純粹CRUD)
- 複習服務: 5個 → 0個 (完全移除)
- 系統複雜度: 大幅降低，架構清晰

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
鄭沛軒 2025-09-29 21:40:04 +08:00
parent 95952621ee
commit a613ca22b7
31 changed files with 1811 additions and 4128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

466
backend/DramaLing.Api/Controllers/FlashcardsController.cs
View File

@ -2,96 +2,52 @@ using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore;
using DramaLing.Api.Data; using DramaLing.Api.Data;
using DramaLing.Api.Models.Entities; using DramaLing.Api.Models.Entities;
using DramaLing.Api.Models.DTOs;
using DramaLing.Api.Models.DTOs.SpacedRepetition;
using DramaLing.Api.Services;
using DramaLing.Api.Services.Storage;
using Microsoft.AspNetCore.Authorization; using Microsoft.AspNetCore.Authorization;
using System.Security.Claims;
namespace DramaLing.Api.Controllers; namespace DramaLing.Api.Controllers;
[ApiController] [ApiController]
[Route("api/flashcards")] [Route("api/flashcards")]
[AllowAnonymous] // 暫時移除認證要求，修復網路錯誤 [AllowAnonymous]
public class FlashcardsController : ControllerBase public class FlashcardsController : ControllerBase
{ {
private readonly DramaLingDbContext _context; private readonly DramaLingDbContext _context;
private readonly ILogger<FlashcardsController> _logger; private readonly ILogger<FlashcardsController> _logger;
private readonly IImageStorageService _imageStorageService;
private readonly IAuthService _authService;
// 🆕 智能複習服務依賴
private readonly ISpacedRepetitionService _spacedRepetitionService;
private readonly IReviewTypeSelectorService _reviewTypeSelectorService;
private readonly IQuestionGeneratorService _questionGeneratorService;
// 🆕 智能填空題服務依賴
private readonly IBlankGenerationService _blankGenerationService;
public FlashcardsController( public FlashcardsController(
DramaLingDbContext context, DramaLingDbContext context,
ILogger<FlashcardsController> logger, ILogger<FlashcardsController> logger)
IImageStorageService imageStorageService,
IAuthService authService,
ISpacedRepetitionService spacedRepetitionService,
IReviewTypeSelectorService reviewTypeSelectorService,
IQuestionGeneratorService questionGeneratorService,
IBlankGenerationService blankGenerationService)
{ {
_context = context; _context = context;
_logger = logger; _logger = logger;
_imageStorageService = imageStorageService;
_authService = authService;
_spacedRepetitionService = spacedRepetitionService;
_reviewTypeSelectorService = reviewTypeSelectorService;
_questionGeneratorService = questionGeneratorService;
_blankGenerationService = blankGenerationService;
} }
private Guid GetUserId() private Guid GetUserId()
{ {
// 暫時使用固定測試用戶 ID，避免認證問題 // 暫時使用固定測試用戶 ID
// TODO: 恢復真實認證後改回 JWT Token 解析
return Guid.Parse("00000000-0000-0000-0000-000000000001"); return Guid.Parse("00000000-0000-0000-0000-000000000001");
// var userIdString = User.FindFirst(ClaimTypes.NameIdentifier)?.Value ??
// User.FindFirst("sub")?.Value;
//
// if (Guid.TryParse(userIdString, out var userId))
// return userId;
//
// throw new UnauthorizedAccessException("Invalid user ID in token");
} }
[HttpGet] [HttpGet]
public async Task<ActionResult> GetFlashcards( public async Task<ActionResult> GetFlashcards(
[FromQuery] string? search = null, [FromQuery] string? search = null,
[FromQuery] bool favoritesOnly = false, [FromQuery] bool favoritesOnly = false)
[FromQuery] string? cefrLevel = null,
[FromQuery] string? partOfSpeech = null,
[FromQuery] string? masteryLevel = null)
{ {
try try
{ {
var userId = GetUserId(); var userId = GetUserId();
_logger.LogInformation("GetFlashcards called for user: {UserId}", userId);
var query = _context.Flashcards var query = _context.Flashcards
.Include(f => f.FlashcardExampleImages)
.ThenInclude(fei => fei.ExampleImage)
.Where(f => f.UserId == userId && !f.IsArchived) .Where(f => f.UserId == userId && !f.IsArchived)
.AsQueryable(); .AsQueryable();
_logger.LogInformation("Base query created successfully"); // 搜尋篩選
// 搜尋篩選 (擴展支援例句內容)
if (!string.IsNullOrEmpty(search)) if (!string.IsNullOrEmpty(search))
{ {
query = query.Where(f => query = query.Where(f =>
f.Word.Contains(search) || f.Word.Contains(search) ||
f.Translation.Contains(search) || f.Translation.Contains(search) ||
(f.Definition != null && f.Definition.Contains(search)) || (f.Definition != null && f.Definition.Contains(search)));
(f.Example != null && f.Example.Contains(search)) ||
(f.ExampleTranslation != null && f.ExampleTranslation.Contains(search)));
} }
// 收藏篩選 // 收藏篩選
@ -100,99 +56,40 @@ public class FlashcardsController : ControllerBase
query = query.Where(f => f.IsFavorite); query = query.Where(f => f.IsFavorite);
} }
// CEFR 等級篩選
if (!string.IsNullOrEmpty(cefrLevel))
{
query = query.Where(f => f.DifficultyLevel == cefrLevel);
}
// 詞性篩選
if (!string.IsNullOrEmpty(partOfSpeech))
{
query = query.Where(f => f.PartOfSpeech == partOfSpeech);
}
// 掌握度篩選
if (!string.IsNullOrEmpty(masteryLevel))
{
switch (masteryLevel.ToLower())
{
case "high":
query = query.Where(f => f.MasteryLevel >= 80);
break;
case "medium":
query = query.Where(f => f.MasteryLevel >= 60 && f.MasteryLevel < 80);
break;
case "low":
query = query.Where(f => f.MasteryLevel < 60);
break;
}
}
_logger.LogInformation("Executing database query...");
var flashcards = await query var flashcards = await query
.AsNoTracking() // 效能優化：只讀查詢 .AsNoTracking()
.OrderByDescending(f => f.CreatedAt) .OrderByDescending(f => f.CreatedAt)
.ToListAsync(); .Select(f => new
_logger.LogInformation("Found {Count} flashcards", flashcards.Count);
// 生成圖片資訊
var flashcardDtos = new List<object>();
foreach (var flashcard in flashcards)
{
// 獲取例句圖片資料 (與 GetFlashcard 方法保持一致)
var exampleImages = flashcard.FlashcardExampleImages?
.Select(fei => new
{
Id = fei.ExampleImage.Id,
ImageUrl = $"http://localhost:5008/images/examples/{fei.ExampleImage.RelativePath}",
IsPrimary = fei.IsPrimary,
QualityScore = fei.ExampleImage.QualityScore,
FileSize = fei.ExampleImage.FileSize,
CreatedAt = fei.ExampleImage.CreatedAt
})
.ToList();
flashcardDtos.Add(new
{ {
flashcard.Id, f.Id,
flashcard.Word, f.Word,
flashcard.Translation, f.Translation,
flashcard.Definition, f.Definition,
flashcard.PartOfSpeech, f.PartOfSpeech,
flashcard.Pronunciation, f.Pronunciation,
flashcard.Example, f.Example,
flashcard.ExampleTranslation, f.ExampleTranslation,
flashcard.MasteryLevel, f.IsFavorite,
flashcard.TimesReviewed, f.DifficultyLevel,
flashcard.IsFavorite, f.CreatedAt,
flashcard.NextReviewDate, f.UpdatedAt
flashcard.DifficultyLevel, })
flashcard.CreatedAt, .ToListAsync();
flashcard.UpdatedAt,
// 新增圖片相關欄位
ExampleImages = exampleImages ?? (object)new List<object>(),
HasExampleImage = exampleImages?.Any() ?? false,
PrimaryImageUrl = exampleImages?.FirstOrDefault(img => img.IsPrimary)?.ImageUrl
});
}
return Ok(new return Ok(new
{ {
Success = true, Success = true,
Data = new Data = new
{ {
Flashcards = flashcardDtos, Flashcards = flashcards,
Count = flashcardDtos.Count Count = flashcards.Count
} }
}); });
} }
catch (Exception ex) catch (Exception ex)
{ {
_logger.LogError(ex, "Error getting flashcards for user: {Message}", ex.Message); _logger.LogError(ex, "Error getting flashcards");
_logger.LogError("Stack trace: {StackTrace}", ex.StackTrace); return StatusCode(500, new { Success = false, Error = "Failed to load flashcards" });
return StatusCode(500, new { Success = false, Error = "Failed to load flashcards", Details = ex.Message });
} }
} }
@ -203,52 +100,6 @@ public class FlashcardsController : ControllerBase
{ {
var userId = GetUserId(); var userId = GetUserId();
// 確保測試用戶存在
var testUser = await _context.Users.FirstOrDefaultAsync(u => u.Id == userId);
if (testUser == null)
{
testUser = new User
{
Id = userId,
Username = "testuser",
Email = "test@example.com",
PasswordHash = "test_hash",
DisplayName = "測試用戶",
SubscriptionType = "free",
Preferences = new Dictionary<string, object>(),
EnglishLevel = "A2",
LevelUpdatedAt = DateTime.UtcNow,
IsLevelVerified = false,
CreatedAt = DateTime.UtcNow,
UpdatedAt = DateTime.UtcNow
};
_context.Users.Add(testUser);
await _context.SaveChangesAsync();
}
// 檢測重複詞卡
var existing = await _context.Flashcards
.FirstOrDefaultAsync(f => f.UserId == userId &&
f.Word.ToLower() == request.Word.ToLower() &&
!f.IsArchived);
if (existing != null)
{
return Ok(new
{
Success = false,
Error = "詞卡已存在",
IsDuplicate = true,
ExistingCard = new
{
existing.Id,
existing.Word,
existing.Translation,
existing.CreatedAt
}
});
}
var flashcard = new Flashcard var flashcard = new Flashcard
{ {
Id = Guid.NewGuid(), Id = Guid.NewGuid(),
@ -260,16 +111,7 @@ public class FlashcardsController : ControllerBase
Pronunciation = request.Pronunciation, Pronunciation = request.Pronunciation,
Example = request.Example, Example = request.Example,
ExampleTranslation = request.ExampleTranslation, ExampleTranslation = request.ExampleTranslation,
Synonyms = request.Synonyms != null && request.Synonyms.Any()
? System.Text.Json.JsonSerializer.Serialize(request.Synonyms)
: null,
MasteryLevel = 0,
TimesReviewed = 0,
IsFavorite = false,
NextReviewDate = DateTime.Today,
DifficultyLevel = "A2", // 預設等級 DifficultyLevel = "A2", // 預設等級
EasinessFactor = 2.5f,
IntervalDays = 1,
CreatedAt = DateTime.UtcNow, CreatedAt = DateTime.UtcNow,
UpdatedAt = DateTime.UtcNow UpdatedAt = DateTime.UtcNow
}; };
@ -280,14 +122,7 @@ public class FlashcardsController : ControllerBase
return Ok(new return Ok(new
{ {
Success = true, Success = true,
Data = new Data = flashcard,
{
flashcard.Id,
flashcard.Word,
flashcard.Translation,
flashcard.Definition,
flashcard.CreatedAt
},
Message = "詞卡創建成功" Message = "詞卡創建成功"
}); });
} }
@ -306,8 +141,6 @@ public class FlashcardsController : ControllerBase
var userId = GetUserId(); var userId = GetUserId();
var flashcard = await _context.Flashcards var flashcard = await _context.Flashcards
.Include(f => f.FlashcardExampleImages)
.ThenInclude(fei => fei.ExampleImage)
.FirstOrDefaultAsync(f => f.Id == id && f.UserId == userId); .FirstOrDefaultAsync(f => f.Id == id && f.UserId == userId);
if (flashcard == null) if (flashcard == null)
@ -315,48 +148,7 @@ public class FlashcardsController : ControllerBase
return NotFound(new { Success = false, Error = "Flashcard not found" }); return NotFound(new { Success = false, Error = "Flashcard not found" });
} }
// 獲取例句圖片資料 return Ok(new { Success = true, Data = flashcard });
var exampleImages = flashcard.FlashcardExampleImages
?.Select(fei => new
{
Id = fei.ExampleImage.Id,
ImageUrl = $"http://localhost:5008/images/examples/{fei.ExampleImage.RelativePath}",
IsPrimary = fei.IsPrimary,
QualityScore = fei.ExampleImage.QualityScore,
FileSize = fei.ExampleImage.FileSize,
CreatedAt = fei.ExampleImage.CreatedAt
})
.ToList();
return Ok(new
{
Success = true,
Data = new
{
flashcard.Id,
flashcard.Word,
flashcard.Translation,
flashcard.Definition,
flashcard.PartOfSpeech,
flashcard.Pronunciation,
flashcard.Example,
flashcard.ExampleTranslation,
flashcard.MasteryLevel,
flashcard.TimesReviewed,
flashcard.IsFavorite,
flashcard.NextReviewDate,
flashcard.DifficultyLevel,
flashcard.CreatedAt,
flashcard.UpdatedAt,
// 新增圖片相關欄位
ExampleImages = exampleImages ?? (object)new List<object>(),
HasExampleImage = exampleImages?.Any() ?? false,
PrimaryImageUrl = flashcard.FlashcardExampleImages?
.Where(fei => fei.IsPrimary)
.Select(fei => $"http://localhost:5008/images/examples/{fei.ExampleImage.RelativePath}")
.FirstOrDefault()
}
});
} }
catch (Exception ex) catch (Exception ex)
{ {
@ -395,15 +187,7 @@ public class FlashcardsController : ControllerBase
return Ok(new return Ok(new
{ {
Success = true, Success = true,
Data = new Data = flashcard,
{
flashcard.Id,
flashcard.Word,
flashcard.Translation,
flashcard.Definition,
flashcard.CreatedAt,
flashcard.UpdatedAt
},
Message = "詞卡更新成功" Message = "詞卡更新成功"
}); });
} }
@ -473,198 +257,9 @@ public class FlashcardsController : ControllerBase
return StatusCode(500, new { Success = false, Error = "Failed to toggle favorite" }); return StatusCode(500, new { Success = false, Error = "Failed to toggle favorite" });
} }
} }
// ================== 🆕 智能複習API端點 ==================
/// <summary>
/// 取得到期詞卡列表
/// </summary>
[HttpGet("due")]
public async Task<ActionResult> GetDueFlashcards(
[FromQuery] string? date = null,
[FromQuery] int limit = 50)
{
try
{
var userId = GetUserId();
var queryDate = DateTime.TryParse(date, out var parsed) ? parsed : DateTime.Now.Date;
var dueCards = await _spacedRepetitionService.GetDueFlashcardsAsync(userId, queryDate, limit);
// 🆕 智能挖空處理：檢查並生成缺失的填空題目
var cardsToUpdate = new List<Flashcard>();
foreach(var flashcard in dueCards)
{
if(string.IsNullOrEmpty(flashcard.FilledQuestionText) && !string.IsNullOrEmpty(flashcard.Example))
{
_logger.LogDebug("Generating blank question for flashcard {Id}, word: {Word}",
flashcard.Id, flashcard.Word);
var blankQuestion = await _blankGenerationService.GenerateBlankQuestionAsync(
flashcard.Word, flashcard.Example);
if(!string.IsNullOrEmpty(blankQuestion))
{
flashcard.FilledQuestionText = blankQuestion;
flashcard.UpdatedAt = DateTime.UtcNow;
cardsToUpdate.Add(flashcard);
_logger.LogInformation("Generated blank question for flashcard {Id}, word: {Word}",
flashcard.Id, flashcard.Word);
}
else
{
_logger.LogWarning("Failed to generate blank question for flashcard {Id}, word: {Word}",
flashcard.Id, flashcard.Word);
}
}
}
// 批次更新資料庫
if (cardsToUpdate.Count > 0)
{
_context.UpdateRange(cardsToUpdate);
await _context.SaveChangesAsync();
_logger.LogInformation("Updated {Count} flashcards with blank questions", cardsToUpdate.Count);
}
_logger.LogInformation("Retrieved {Count} due flashcards for user {UserId}", dueCards.Count, userId);
return Ok(new { success = true, data = dueCards, count = dueCards.Count });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting due flashcards");
return StatusCode(500, new { success = false, error = "Failed to get due flashcards" });
}
}
/// <summary>
/// 取得下一張需要復習的詞卡 (最高優先級)
/// </summary>
[HttpGet("next-review")]
public async Task<ActionResult> GetNextReviewCard()
{
try
{
var userId = GetUserId();
var nextCard = await _spacedRepetitionService.GetNextReviewCardAsync(userId);
if (nextCard == null)
{
return Ok(new { success = true, data = (object?)null, message = "沒有到期的詞卡" });
}
// 計算當前熟悉度
var currentMasteryLevel = _spacedRepetitionService.CalculateCurrentMasteryLevel(nextCard);
// UserLevel和WordLevel欄位已移除 - 改用即時CEFR轉換
var response = new
{
nextCard.Id,
nextCard.Word,
nextCard.Translation,
nextCard.Definition,
nextCard.Pronunciation,
nextCard.PartOfSpeech,
nextCard.Example,
nextCard.ExampleTranslation,
nextCard.MasteryLevel,
nextCard.TimesReviewed,
nextCard.IsFavorite,
nextCard.NextReviewDate,
nextCard.DifficultyLevel,
// 智能複習擴展欄位 (改用即時CEFR轉換)
BaseMasteryLevel = nextCard.MasteryLevel,
LastReviewDate = nextCard.LastReviewedAt,
CurrentInterval = nextCard.IntervalDays,
IsOverdue = DateTime.Now.Date > nextCard.NextReviewDate.Date,
OverdueDays = Math.Max(0, (DateTime.Now.Date - nextCard.NextReviewDate.Date).Days),
CurrentMasteryLevel = currentMasteryLevel
};
_logger.LogInformation("Retrieved next review card: {Word} for user {UserId}", nextCard.Word, userId);
return Ok(new { success = true, data = response });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting next review card");
return StatusCode(500, new { success = false, error = "Failed to get next review card" });
}
}
/// <summary>
/// 系統自動選擇最適合的複習題型 (基於CEFR等級)
/// </summary>
[HttpPost("{id}/optimal-review-mode")]
public async Task<ActionResult> GetOptimalReviewMode(Guid id, [FromBody] OptimalModeRequest request)
{
try
{
var result = await _reviewTypeSelectorService.SelectOptimalReviewModeAsync(
id, request.UserCEFRLevel, request.WordCEFRLevel);
_logger.LogInformation("Selected optimal review mode {SelectedMode} for flashcard {FlashcardId}, userCEFR: {UserCEFR}, wordCEFR: {WordCEFR}",
result.SelectedMode, id, request.UserCEFRLevel, request.WordCEFRLevel);
return Ok(new { success = true, data = result });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error selecting optimal review mode for flashcard {FlashcardId}", id);
return StatusCode(500, new { success = false, error = "Failed to select optimal review mode" });
}
}
/// <summary>
/// 生成指定題型的題目選項
/// </summary>
[HttpPost("{id}/question")]
public async Task<ActionResult> GenerateQuestion(Guid id, [FromBody] QuestionRequest request)
{
try
{
var questionData = await _questionGeneratorService.GenerateQuestionAsync(id, request.QuestionType);
_logger.LogInformation("Generated {QuestionType} question for flashcard {FlashcardId}",
request.QuestionType, id);
return Ok(new { success = true, data = questionData });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error generating {QuestionType} question for flashcard {FlashcardId}",
request.QuestionType, id);
return StatusCode(500, new { success = false, error = "Failed to generate question" });
}
}
/// <summary>
/// 提交復習結果並更新間隔重複算法
/// </summary>
[HttpPost("{id}/review")]
public async Task<ActionResult> SubmitReview(Guid id, [FromBody] ReviewRequest request)
{
try
{
var result = await _spacedRepetitionService.ProcessReviewAsync(id, request);
_logger.LogInformation("Processed review for flashcard {FlashcardId}, questionType: {QuestionType}, isCorrect: {IsCorrect}",
id, request.QuestionType, request.IsCorrect);
return Ok(new { success = true, data = result });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error processing review for flashcard {FlashcardId}", id);
return StatusCode(500, new { success = false, error = "Failed to process review" });
}
}
} }
// 請求 DTO // DTO 類別
public class CreateFlashcardRequest public class CreateFlashcardRequest
{ {
public string Word { get; set; } = string.Empty; public string Word { get; set; } = string.Empty;
@ -674,5 +269,4 @@ public class CreateFlashcardRequest
public string Pronunciation { get; set; } = string.Empty; public string Pronunciation { get; set; } = string.Empty;
public string Example { get; set; } = string.Empty; public string Example { get; set; } = string.Empty;
public string? ExampleTranslation { get; set; } public string? ExampleTranslation { get; set; }
public List<string>? Synonyms { get; set; }
} }

755
backend/DramaLing.Api/Controllers/StudyController.cs
View File

@ -1,755 +0,0 @@
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using DramaLing.Api.Data;
using DramaLing.Api.Models.Entities;
using DramaLing.Api.Services;
using Microsoft.AspNetCore.Authorization;
namespace DramaLing.Api.Controllers;
[ApiController]
[Route("api/[controller]")]
[Authorize]
public class StudyController : ControllerBase
{
private readonly DramaLingDbContext _context;
private readonly IAuthService _authService;
private readonly ILogger<StudyController> _logger;
public StudyController(
DramaLingDbContext context,
IAuthService authService,
ILogger<StudyController> logger)
{
_context = context;
_authService = authService;
_logger = logger;
}
/// <summary>
/// 獲取待複習的詞卡 (支援 /frontend/app/learn/page.tsx)
/// </summary>
[HttpGet("due-cards")]
public async Task<ActionResult> GetDueCards(
[FromQuery] int limit = 50,
[FromQuery] string? mode = null,
[FromQuery] bool includeNew = true)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var today = DateTime.Today;
var query = _context.Flashcards
.Where(f => f.UserId == userId);
// 篩選到期和新詞卡
if (includeNew)
{
// 包含到期詞卡和新詞卡
query = query.Where(f => f.NextReviewDate <= today || f.Repetitions == 0);
}
else
{
// 只包含到期詞卡
query = query.Where(f => f.NextReviewDate <= today);
}
var dueCards = await query.Take(limit * 2).ToListAsync(); // 取更多用於排序
// 計算優先級並排序
var cardsWithPriority = dueCards.Select(card => new
{
Card = card,
Priority = ReviewPriorityCalculator.CalculatePriority(
card.NextReviewDate,
card.EasinessFactor,
card.Repetitions
),
IsDue = ReviewPriorityCalculator.ShouldReview(card.NextReviewDate),
DaysOverdue = Math.Max(0, (today - card.NextReviewDate).Days)
}).OrderByDescending(x => x.Priority).Take(limit);
var result = cardsWithPriority.Select(x => new
{
x.Card.Id,
x.Card.Word,
x.Card.Translation,
x.Card.Definition,
x.Card.PartOfSpeech,
x.Card.Pronunciation,
x.Card.Example,
x.Card.ExampleTranslation,
x.Card.MasteryLevel,
x.Card.NextReviewDate,
x.Card.DifficultyLevel,
CardSet = new
{
Name = "Default",
Color = "bg-blue-500"
},
x.Priority,
x.IsDue,
x.DaysOverdue
}).ToList();
// 統計資訊
var totalDue = await _context.Flashcards
.Where(f => f.UserId == userId && f.NextReviewDate <= today)
.CountAsync();
var totalCards = await _context.Flashcards
.Where(f => f.UserId == userId)
.CountAsync();
var newCards = await _context.Flashcards
.Where(f => f.UserId == userId && f.Repetitions == 0)
.CountAsync();
return Ok(new
{
Success = true,
Data = new
{
Cards = result,
TotalDue = totalDue,
TotalCards = totalCards,
NewCards = newCards
}
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error fetching due cards for user");
return StatusCode(500, new
{
Success = false,
Error = "Failed to fetch due cards",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 開始學習會話
/// </summary>
[HttpPost("sessions")]
public async Task<ActionResult> CreateStudySession([FromBody] CreateStudySessionRequest request)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
// 基本驗證
if (string.IsNullOrEmpty(request.Mode) ||
!new[] { "flip", "quiz", "fill", "listening", "speaking" }.Contains(request.Mode))
{
return BadRequest(new { Success = false, Error = "Invalid study mode" });
}
if (request.CardIds == null || request.CardIds.Count == 0)
{
return BadRequest(new { Success = false, Error = "Card IDs are required" });
}
if (request.CardIds.Count > 50)
{
return BadRequest(new { Success = false, Error = "Cannot study more than 50 cards in one session" });
}
// 驗證詞卡是否屬於用戶
var userCards = await _context.Flashcards
.Where(f => f.UserId == userId && request.CardIds.Contains(f.Id))
.CountAsync();
if (userCards != request.CardIds.Count)
{
return BadRequest(new { Success = false, Error = "Some cards not found or not accessible" });
}
// 建立學習會話
var session = new StudySession
{
Id = Guid.NewGuid(),
UserId = userId.Value,
SessionType = request.Mode,
TotalCards = request.CardIds.Count,
StartedAt = DateTime.UtcNow
};
_context.StudySessions.Add(session);
await _context.SaveChangesAsync();
// 獲取詞卡詳細資訊
var cards = await _context.Flashcards
.Where(f => f.UserId == userId && request.CardIds.Contains(f.Id))
.ToListAsync();
// 按照請求的順序排列
var orderedCards = request.CardIds
.Select(id => cards.FirstOrDefault(c => c.Id == id))
.Where(c => c != null)
.ToList();
return Ok(new
{
Success = true,
Data = new
{
SessionId = session.Id,
SessionType = request.Mode,
Cards = orderedCards.Select(c => new
{
c.Id,
c.Word,
c.Translation,
c.Definition,
c.PartOfSpeech,
c.Pronunciation,
c.Example,
c.ExampleTranslation,
c.MasteryLevel,
c.EasinessFactor,
c.Repetitions,
CardSet = new { Name = "Default", Color = "bg-blue-500" }
}),
TotalCards = orderedCards.Count,
StartedAt = session.StartedAt
},
Message = $"Study session started with {orderedCards.Count} cards"
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error creating study session");
return StatusCode(500, new
{
Success = false,
Error = "Failed to create study session",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 記錄學習結果 (支援 SM-2 算法)
/// </summary>
[HttpPost("sessions/{sessionId}/record")]
public async Task<ActionResult> RecordStudyResult(
Guid sessionId,
[FromBody] RecordStudyResultRequest request)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
// 基本驗證
if (request.QualityRating < 1 || request.QualityRating > 5)
{
return BadRequest(new { Success = false, Error = "Quality rating must be between 1 and 5" });
}
// 驗證學習會話
var session = await _context.StudySessions
.FirstOrDefaultAsync(s => s.Id == sessionId && s.UserId == userId);
if (session == null)
{
return NotFound(new { Success = false, Error = "Study session not found" });
}
// 驗證詞卡
var flashcard = await _context.Flashcards
.FirstOrDefaultAsync(f => f.Id == request.FlashcardId && f.UserId == userId);
if (flashcard == null)
{
return NotFound(new { Success = false, Error = "Flashcard not found" });
}
// 計算新的 SM-2 參數
var sm2Input = new SM2Input(
request.QualityRating,
flashcard.EasinessFactor,
flashcard.Repetitions,
flashcard.IntervalDays
);
var sm2Result = SM2Algorithm.Calculate(sm2Input);
// 記錄學習結果
var studyRecord = new StudyRecord
{
Id = Guid.NewGuid(),
UserId = userId.Value,
FlashcardId = request.FlashcardId,
SessionId = sessionId,
StudyMode = session.SessionType,
QualityRating = request.QualityRating,
ResponseTimeMs = request.ResponseTimeMs,
UserAnswer = request.UserAnswer,
IsCorrect = request.IsCorrect,
PreviousEasinessFactor = sm2Input.EasinessFactor,
NewEasinessFactor = sm2Result.EasinessFactor,
PreviousIntervalDays = sm2Input.IntervalDays,
NewIntervalDays = sm2Result.IntervalDays,
PreviousRepetitions = sm2Input.Repetitions,
NewRepetitions = sm2Result.Repetitions,
NextReviewDate = sm2Result.NextReviewDate,
StudiedAt = DateTime.UtcNow
};
_context.StudyRecords.Add(studyRecord);
// 更新詞卡的 SM-2 參數
flashcard.EasinessFactor = sm2Result.EasinessFactor;
flashcard.Repetitions = sm2Result.Repetitions;
flashcard.IntervalDays = sm2Result.IntervalDays;
flashcard.NextReviewDate = sm2Result.NextReviewDate;
flashcard.MasteryLevel = SM2Algorithm.CalculateMastery(sm2Result.Repetitions, sm2Result.EasinessFactor);
flashcard.TimesReviewed++;
if (request.IsCorrect) flashcard.TimesCorrect++;
flashcard.LastReviewedAt = DateTime.UtcNow;
await _context.SaveChangesAsync();
return Ok(new
{
Success = true,
Data = new
{
RecordId = studyRecord.Id,
NextReviewDate = sm2Result.NextReviewDate.ToString("yyyy-MM-dd"),
NewIntervalDays = sm2Result.IntervalDays,
NewMasteryLevel = flashcard.MasteryLevel,
EasinessFactor = sm2Result.EasinessFactor,
Repetitions = sm2Result.Repetitions,
QualityDescription = SM2Algorithm.GetQualityDescription(request.QualityRating)
},
Message = $"Study record saved. Next review in {sm2Result.IntervalDays} day(s)"
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error recording study result");
return StatusCode(500, new
{
Success = false,
Error = "Failed to record study result",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 完成學習會話
/// </summary>
[HttpPost("sessions/{sessionId}/complete")]
public async Task<ActionResult> CompleteStudySession(
Guid sessionId,
[FromBody] CompleteStudySessionRequest request)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
// 驗證會話
var session = await _context.StudySessions
.FirstOrDefaultAsync(s => s.Id == sessionId && s.UserId == userId);
if (session == null)
{
return NotFound(new { Success = false, Error = "Study session not found" });
}
// 計算會話統計
var sessionRecords = await _context.StudyRecords
.Where(r => r.SessionId == sessionId && r.UserId == userId)
.ToListAsync();
var correctCount = sessionRecords.Count(r => r.IsCorrect);
var averageResponseTime = sessionRecords.Any(r => r.ResponseTimeMs.HasValue)
? (int)sessionRecords.Where(r => r.ResponseTimeMs.HasValue).Average(r => r.ResponseTimeMs!.Value)
: 0;
// 更新會話
session.EndedAt = DateTime.UtcNow;
session.CorrectCount = correctCount;
session.DurationSeconds = request.DurationSeconds;
session.AverageResponseTimeMs = averageResponseTime;
// 更新或建立每日統計
var today = DateOnly.FromDateTime(DateTime.Today);
var dailyStats = await _context.DailyStats
.FirstOrDefaultAsync(ds => ds.UserId == userId && ds.Date == today);
if (dailyStats == null)
{
dailyStats = new DailyStats
{
Id = Guid.NewGuid(),
UserId = userId.Value,
Date = today
};
_context.DailyStats.Add(dailyStats);
}
dailyStats.WordsStudied += sessionRecords.Count;
dailyStats.WordsCorrect += correctCount;
dailyStats.StudyTimeSeconds += request.DurationSeconds;
dailyStats.SessionCount++;
await _context.SaveChangesAsync();
// 計算會話統計
var accuracy = sessionRecords.Count > 0
? (int)Math.Round((double)correctCount / sessionRecords.Count * 100)
: 0;
var averageTimePerCard = request.DurationSeconds > 0 && sessionRecords.Count > 0
? request.DurationSeconds / sessionRecords.Count
: 0;
return Ok(new
{
Success = true,
Data = new
{
SessionId = sessionId,
TotalCards = session.TotalCards,
CardsStudied = sessionRecords.Count,
CorrectAnswers = correctCount,
AccuracyPercentage = accuracy,
DurationSeconds = request.DurationSeconds,
AverageTimePerCard = averageTimePerCard,
AverageResponseTimeMs = averageResponseTime,
StartedAt = session.StartedAt,
EndedAt = session.EndedAt
},
Message = $"Study session completed! {correctCount}/{sessionRecords.Count} correct ({accuracy}%)"
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error completing study session");
return StatusCode(500, new
{
Success = false,
Error = "Failed to complete study session",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 獲取智能複習排程
/// </summary>
[HttpGet("schedule")]
public async Task<ActionResult> GetReviewSchedule(
[FromQuery] bool includePlan = true,
[FromQuery] bool includeStats = true)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
// 獲取用戶設定
var settings = await _context.UserSettings
.FirstOrDefaultAsync(s => s.UserId == userId);
var dailyGoal = settings?.DailyGoal ?? 20;
// 獲取所有詞卡
var allCards = await _context.Flashcards
.Where(f => f.UserId == userId)
.ToListAsync();
var today = DateTime.Today;
// 分類詞卡
var dueToday = allCards.Where(c => c.NextReviewDate == today).ToList();
var overdue = allCards.Where(c => c.NextReviewDate < today && c.Repetitions > 0).ToList();
var upcoming = allCards.Where(c => c.NextReviewDate > today && c.NextReviewDate <= today.AddDays(7)).ToList();
var newCards = allCards.Where(c => c.Repetitions == 0).ToList();
// 建立回應物件
var responseData = new Dictionary<string, object>
{
["Schedule"] = new
{
DueToday = dueToday.Count,
Overdue = overdue.Count,
Upcoming = upcoming.Count,
NewCards = newCards.Count
}
};
// 生成學習計劃
if (includePlan)
{
var recommendedCards = overdue.Take(dailyGoal / 2)
.Concat(dueToday.Take(dailyGoal / 3))
.Concat(newCards.Take(Math.Min(5, dailyGoal / 4)))
.Take(dailyGoal)
.Select(c => new
{
c.Id,
c.Word,
c.Translation,
c.MasteryLevel,
c.NextReviewDate,
PriorityReason = c.Repetitions == 0 ? "new_card" :
c.NextReviewDate < today ? "overdue" : "due_today"
});
responseData["StudyPlan"] = new
{
RecommendedCards = recommendedCards,
Breakdown = new
{
Overdue = Math.Min(overdue.Count, dailyGoal / 2),
DueToday = Math.Min(dueToday.Count, dailyGoal / 3),
NewCards = Math.Min(newCards.Count, 5)
},
EstimatedTimeMinutes = recommendedCards.Count() * 1,
DailyGoal = dailyGoal
};
}
// 計算統計
if (includeStats)
{
responseData["Statistics"] = new
{
TotalCards = allCards.Count,
MasteredCards = allCards.Count(c => c.MasteryLevel >= 80),
LearningCards = allCards.Count(c => c.MasteryLevel >= 40 && c.MasteryLevel < 80),
NewCardsCount = newCards.Count,
AverageMastery = allCards.Count > 0 ? (int)allCards.Average(c => c.MasteryLevel) : 0,
RetentionRate = allCards.Count(c => c.Repetitions > 0) > 0
? (int)Math.Round((double)allCards.Count(c => c.MasteryLevel >= 60) / allCards.Count(c => c.Repetitions > 0) * 100)
: 0
};
}
return Ok(new
{
Success = true,
Data = responseData
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error fetching review schedule");
return StatusCode(500, new
{
Success = false,
Error = "Failed to fetch review schedule",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 獲取已完成的測驗記錄 (支援學習狀態恢復)
/// </summary>
[HttpGet("completed-tests")]
public async Task<ActionResult> GetCompletedTests([FromQuery] string? cardIds = null)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var query = _context.StudyRecords.Where(r => r.UserId == userId);
// 如果提供了詞卡ID列表，則篩選
if (!string.IsNullOrEmpty(cardIds))
{
var cardIdList = cardIds.Split(',')
.Where(id => Guid.TryParse(id, out _))
.Select(Guid.Parse)
.ToList();
if (cardIdList.Any())
{
query = query.Where(r => cardIdList.Contains(r.FlashcardId));
}
}
var completedTests = await query
.Select(r => new
{
FlashcardId = r.FlashcardId,
TestType = r.StudyMode,
IsCorrect = r.IsCorrect,
CompletedAt = r.StudiedAt,
UserAnswer = r.UserAnswer
})
.ToListAsync();
_logger.LogInformation("Retrieved {Count} completed tests for user {UserId}",
completedTests.Count, userId);
return Ok(new
{
Success = true,
Data = completedTests
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error retrieving completed tests for user");
return StatusCode(500, new
{
Success = false,
Error = "Failed to retrieve completed tests",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 直接記錄測驗完成狀態 (不觸發SM2更新)
/// </summary>
[HttpPost("record-test")]
public async Task<ActionResult> RecordTestCompletion([FromBody] RecordTestRequest request)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
{
_logger.LogWarning("RecordTest failed: Invalid or missing token");
return Unauthorized(new { Success = false, Error = "Invalid token" });
}
_logger.LogInformation("Recording test for user {UserId}: FlashcardId={FlashcardId}, TestType={TestType}",
userId, request.FlashcardId, request.TestType);
// 驗證測驗類型
var validTestTypes = new[] { "flip-memory", "vocab-choice", "vocab-listening",
"sentence-listening", "sentence-fill", "sentence-reorder", "sentence-speaking" };
if (!validTestTypes.Contains(request.TestType))
{
_logger.LogWarning("Invalid test type: {TestType}", request.TestType);
return BadRequest(new { Success = false, Error = "Invalid test type" });
}
// 先檢查詞卡是否存在
var flashcard = await _context.Flashcards
.FirstOrDefaultAsync(f => f.Id == request.FlashcardId);
if (flashcard == null)
{
_logger.LogWarning("Flashcard {FlashcardId} does not exist", request.FlashcardId);
return NotFound(new { Success = false, Error = "Flashcard does not exist" });
}
// 再檢查詞卡是否屬於用戶
if (flashcard.UserId != userId)
{
_logger.LogWarning("Flashcard {FlashcardId} does not belong to user {UserId}, actual owner: {ActualOwner}",
request.FlashcardId, userId, flashcard.UserId);
return Forbid();
}
// 檢查是否已經完成過這個測驗
var existingRecord = await _context.StudyRecords
.FirstOrDefaultAsync(r => r.UserId == userId &&
r.FlashcardId == request.FlashcardId &&
r.StudyMode == request.TestType);
if (existingRecord != null)
{
return Conflict(new { Success = false, Error = "Test already completed",
CompletedAt = existingRecord.StudiedAt });
}
// 記錄測驗完成狀態
var studyRecord = new StudyRecord
{
Id = Guid.NewGuid(),
UserId = userId.Value,
FlashcardId = request.FlashcardId,
SessionId = Guid.NewGuid(), // 臨時會話ID
StudyMode = request.TestType, // 記錄具體測驗類型
QualityRating = request.ConfidenceLevel ?? (request.IsCorrect ? 4 : 2),
ResponseTimeMs = request.ResponseTimeMs,
UserAnswer = request.UserAnswer,
IsCorrect = request.IsCorrect,
StudiedAt = DateTime.UtcNow
};
_context.StudyRecords.Add(studyRecord);
await _context.SaveChangesAsync();
_logger.LogInformation("Recorded test completion: {TestType} for {Word}, correct: {IsCorrect}",
request.TestType, flashcard.Word, request.IsCorrect);
return Ok(new
{
Success = true,
Data = new
{
RecordId = studyRecord.Id,
TestType = request.TestType,
IsCorrect = request.IsCorrect,
CompletedAt = studyRecord.StudiedAt
},
Message = $"Test {request.TestType} recorded successfully"
});
}
catch (Exception ex)
{
_logger.LogError(ex, "Error recording test completion");
return StatusCode(500, new
{
Success = false,
Error = "Failed to record test completion",
Timestamp = DateTime.UtcNow
});
}
}
}
// Request DTOs
public class CreateStudySessionRequest
{
public string Mode { get; set; } = string.Empty; // flip, quiz, fill, listening, speaking
public List<Guid> CardIds { get; set; } = new();
}
public class RecordStudyResultRequest
{
public Guid FlashcardId { get; set; }
public int QualityRating { get; set; } // 1-5
public int? ResponseTimeMs { get; set; }
public string? UserAnswer { get; set; }
public bool IsCorrect { get; set; }
}
public class CompleteStudySessionRequest
{
public int DurationSeconds { get; set; }
}
public class RecordTestRequest
{
public Guid FlashcardId { get; set; }
public string TestType { get; set; } = string.Empty; // flip-memory, vocab-choice, etc.
public bool IsCorrect { get; set; }
public string? UserAnswer { get; set; }
public int? ConfidenceLevel { get; set; } // 1-5
public int? ResponseTimeMs { get; set; }
}

276
backend/DramaLing.Api/Controllers/StudySessionController.cs
View File

@ -1,276 +0,0 @@
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Authorization;
using DramaLing.Api.Services;
namespace DramaLing.Api.Controllers;
[ApiController]
[Route("api/study/sessions")]
[Authorize]
public class StudySessionController : ControllerBase
{
private readonly IStudySessionService _studySessionService;
private readonly IAuthService _authService;
private readonly ILogger<StudySessionController> _logger;
public StudySessionController(
IStudySessionService studySessionService,
IAuthService authService,
ILogger<StudySessionController> logger)
{
_studySessionService = studySessionService;
_authService = authService;
_logger = logger;
}
/// <summary>
/// 開始新的學習會話
/// </summary>
[HttpPost("start")]
public async Task<ActionResult> StartSession()
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var session = await _studySessionService.StartSessionAsync(userId.Value);
return Ok(new
{
Success = true,
Data = new
{
SessionId = session.Id,
TotalCards = session.TotalCards,
TotalTests = session.TotalTests,
CurrentCardIndex = session.CurrentCardIndex,
CurrentTestType = session.CurrentTestType,
StartedAt = session.StartedAt
},
Message = $"Study session started with {session.TotalCards} cards and {session.TotalTests} tests"
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error starting study session");
return StatusCode(500, new
{
Success = false,
Error = "Failed to start study session",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 獲取當前測驗
/// </summary>
[HttpGet("{sessionId}/current-test")]
public async Task<ActionResult> GetCurrentTest(Guid sessionId)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var currentTest = await _studySessionService.GetCurrentTestAsync(sessionId);
return Ok(new
{
Success = true,
Data = currentTest
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting current test for session {SessionId}", sessionId);
return StatusCode(500, new
{
Success = false,
Error = "Failed to get current test",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 提交測驗結果
/// </summary>
[HttpPost("{sessionId}/submit-test")]
public async Task<ActionResult> SubmitTest(Guid sessionId, [FromBody] SubmitTestRequestDto request)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
// 基本驗證
if (string.IsNullOrEmpty(request.TestType))
{
return BadRequest(new { Success = false, Error = "Test type is required" });
}
if (request.ConfidenceLevel.HasValue && (request.ConfidenceLevel < 1 || request.ConfidenceLevel > 5))
{
return BadRequest(new { Success = false, Error = "Confidence level must be between 1 and 5" });
}
var response = await _studySessionService.SubmitTestAsync(sessionId, request);
return Ok(new
{
Success = response.Success,
Data = new
{
IsCardCompleted = response.IsCardCompleted,
Progress = response.Progress
},
Message = response.IsCardCompleted ? "Card completed!" : "Test recorded successfully"
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error submitting test for session {SessionId}", sessionId);
return StatusCode(500, new
{
Success = false,
Error = "Failed to submit test result",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 獲取下一個測驗
/// </summary>
[HttpGet("{sessionId}/next-test")]
public async Task<ActionResult> GetNextTest(Guid sessionId)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var nextTest = await _studySessionService.GetNextTestAsync(sessionId);
return Ok(new
{
Success = true,
Data = nextTest
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting next test for session {SessionId}", sessionId);
return StatusCode(500, new
{
Success = false,
Error = "Failed to get next test",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 獲取詳細進度
/// </summary>
[HttpGet("{sessionId}/progress")]
public async Task<ActionResult> GetProgress(Guid sessionId)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var progress = await _studySessionService.GetProgressAsync(sessionId);
return Ok(new
{
Success = true,
Data = progress
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting progress for session {SessionId}", sessionId);
return StatusCode(500, new
{
Success = false,
Error = "Failed to get progress",
Timestamp = DateTime.UtcNow
});
}
}
/// <summary>
/// 完成學習會話
/// </summary>
[HttpPut("{sessionId}/complete")]
public async Task<ActionResult> CompleteSession(Guid sessionId)
{
try
{
var userId = await _authService.GetUserIdFromTokenAsync(Request.Headers.Authorization);
if (userId == null)
return Unauthorized(new { Success = false, Error = "Invalid token" });
var session = await _studySessionService.CompleteSessionAsync(sessionId);
return Ok(new
{
Success = true,
Data = new
{
SessionId = session.Id,
CompletedAt = session.EndedAt,
TotalCards = session.TotalCards,
CompletedCards = session.CompletedCards,
TotalTests = session.TotalTests,
CompletedTests = session.CompletedTests,
DurationSeconds = session.DurationSeconds
},
Message = "Study session completed successfully"
});
}
catch (InvalidOperationException ex)
{
return BadRequest(new { Success = false, Error = ex.Message });
}
catch (Exception ex)
{
_logger.LogError(ex, "Error completing session {SessionId}", sessionId);
return StatusCode(500, new
{
Success = false,
Error = "Failed to complete session",
Timestamp = DateTime.UtcNow
});
}
}
}

40
backend/DramaLing.Api/Data/DramaLingDbContext.cs
View File

@ -16,10 +16,7 @@ public class DramaLingDbContext : DbContext
public DbSet<Flashcard> Flashcards { get; set; } public DbSet<Flashcard> Flashcards { get; set; }
public DbSet<Tag> Tags { get; set; } public DbSet<Tag> Tags { get; set; }
public DbSet<FlashcardTag> FlashcardTags { get; set; } public DbSet<FlashcardTag> FlashcardTags { get; set; }
public DbSet<StudySession> StudySessions { get; set; } // StudyRecord removed - study system cleaned
public DbSet<StudyRecord> StudyRecords { get; set; }
public DbSet<StudyCard> StudyCards { get; set; }
public DbSet<TestResult> TestResults { get; set; }
public DbSet<ErrorReport> ErrorReports { get; set; } public DbSet<ErrorReport> ErrorReports { get; set; }
public DbSet<DailyStats> DailyStats { get; set; } public DbSet<DailyStats> DailyStats { get; set; }
public DbSet<SentenceAnalysisCache> SentenceAnalysisCache { get; set; } public DbSet<SentenceAnalysisCache> SentenceAnalysisCache { get; set; }
@ -42,10 +39,7 @@ public class DramaLingDbContext : DbContext
modelBuilder.Entity<Flashcard>().ToTable("flashcards"); modelBuilder.Entity<Flashcard>().ToTable("flashcards");
modelBuilder.Entity<Tag>().ToTable("tags"); modelBuilder.Entity<Tag>().ToTable("tags");
modelBuilder.Entity<FlashcardTag>().ToTable("flashcard_tags"); modelBuilder.Entity<FlashcardTag>().ToTable("flashcard_tags");
modelBuilder.Entity<StudySession>().ToTable("study_sessions"); // StudyRecord table removed
modelBuilder.Entity<StudyRecord>().ToTable("study_records");
modelBuilder.Entity<StudyCard>().ToTable("study_cards");
modelBuilder.Entity<TestResult>().ToTable("test_results");
modelBuilder.Entity<ErrorReport>().ToTable("error_reports"); modelBuilder.Entity<ErrorReport>().ToTable("error_reports");
modelBuilder.Entity<DailyStats>().ToTable("daily_stats"); modelBuilder.Entity<DailyStats>().ToTable("daily_stats");
modelBuilder.Entity<AudioCache>().ToTable("audio_cache"); modelBuilder.Entity<AudioCache>().ToTable("audio_cache");
@ -59,7 +53,7 @@ public class DramaLingDbContext : DbContext
// 配置屬性名稱 (snake_case) // 配置屬性名稱 (snake_case)
ConfigureUserEntity(modelBuilder); ConfigureUserEntity(modelBuilder);
ConfigureFlashcardEntity(modelBuilder); ConfigureFlashcardEntity(modelBuilder);
ConfigureStudyEntities(modelBuilder); // ConfigureStudyEntities removed
ConfigureTagEntities(modelBuilder); ConfigureTagEntities(modelBuilder);
ConfigureErrorReportEntity(modelBuilder); ConfigureErrorReportEntity(modelBuilder);
ConfigureDailyStatsEntity(modelBuilder); ConfigureDailyStatsEntity(modelBuilder);
@ -133,20 +127,10 @@ public class DramaLingDbContext : DbContext
private void ConfigureStudyEntities(ModelBuilder modelBuilder) private void ConfigureStudyEntities(ModelBuilder modelBuilder)
{ {
var sessionEntity = modelBuilder.Entity<StudySession>();
sessionEntity.Property(s => s.UserId).HasColumnName("user_id");
sessionEntity.Property(s => s.SessionType).HasColumnName("session_type");
sessionEntity.Property(s => s.StartedAt).HasColumnName("started_at");
sessionEntity.Property(s => s.EndedAt).HasColumnName("ended_at");
sessionEntity.Property(s => s.TotalCards).HasColumnName("total_cards");
sessionEntity.Property(s => s.CorrectCount).HasColumnName("correct_count");
sessionEntity.Property(s => s.DurationSeconds).HasColumnName("duration_seconds");
sessionEntity.Property(s => s.AverageResponseTimeMs).HasColumnName("average_response_time_ms");
var recordEntity = modelBuilder.Entity<StudyRecord>(); var recordEntity = modelBuilder.Entity<StudyRecord>();
recordEntity.Property(r => r.UserId).HasColumnName("user_id"); recordEntity.Property(r => r.UserId).HasColumnName("user_id");
recordEntity.Property(r => r.FlashcardId).HasColumnName("flashcard_id"); recordEntity.Property(r => r.FlashcardId).HasColumnName("flashcard_id");
recordEntity.Property(r => r.SessionId).HasColumnName("session_id"); // SessionId property removed
recordEntity.Property(r => r.StudyMode).HasColumnName("study_mode"); recordEntity.Property(r => r.StudyMode).HasColumnName("study_mode");
recordEntity.Property(r => r.QualityRating).HasColumnName("quality_rating"); recordEntity.Property(r => r.QualityRating).HasColumnName("quality_rating");
recordEntity.Property(r => r.ResponseTimeMs).HasColumnName("response_time_ms"); recordEntity.Property(r => r.ResponseTimeMs).HasColumnName("response_time_ms");
@ -208,11 +192,6 @@ public class DramaLingDbContext : DbContext
.OnDelete(DeleteBehavior.Cascade); .OnDelete(DeleteBehavior.Cascade);
// Study relationships // Study relationships
modelBuilder.Entity<StudySession>()
.HasOne(ss => ss.User)
.WithMany(u => u.StudySessions)
.HasForeignKey(ss => ss.UserId)
.OnDelete(DeleteBehavior.Cascade);
modelBuilder.Entity<StudyRecord>() modelBuilder.Entity<StudyRecord>()
.HasOne(sr => sr.Flashcard) .HasOne(sr => sr.Flashcard)
@ -333,15 +312,14 @@ public class DramaLingDbContext : DbContext
pronunciationEntity.Property(pa => pa.ProsodyScore).HasColumnName("prosody_score"); pronunciationEntity.Property(pa => pa.ProsodyScore).HasColumnName("prosody_score");
pronunciationEntity.Property(pa => pa.PhonemeScores).HasColumnName("phoneme_scores"); pronunciationEntity.Property(pa => pa.PhonemeScores).HasColumnName("phoneme_scores");
pronunciationEntity.Property(pa => pa.Suggestions).HasColumnName("suggestions"); pronunciationEntity.Property(pa => pa.Suggestions).HasColumnName("suggestions");
pronunciationEntity.Property(pa => pa.StudySessionId).HasColumnName("study_session_id"); // StudySessionId removed
pronunciationEntity.Property(pa => pa.PracticeMode).HasColumnName("practice_mode"); pronunciationEntity.Property(pa => pa.PracticeMode).HasColumnName("practice_mode");
pronunciationEntity.Property(pa => pa.CreatedAt).HasColumnName("created_at"); pronunciationEntity.Property(pa => pa.CreatedAt).HasColumnName("created_at");
pronunciationEntity.HasIndex(pa => new { pa.UserId, pa.FlashcardId }) pronunciationEntity.HasIndex(pa => new { pa.UserId, pa.FlashcardId })
.HasDatabaseName("IX_PronunciationAssessment_UserFlashcard"); .HasDatabaseName("IX_PronunciationAssessment_UserFlashcard");
pronunciationEntity.HasIndex(pa => pa.StudySessionId) // StudySessionId index removed
.HasDatabaseName("IX_PronunciationAssessment_Session");
// UserAudioPreferences configuration // UserAudioPreferences configuration
var audioPrefsEntity = modelBuilder.Entity<UserAudioPreferences>(); var audioPrefsEntity = modelBuilder.Entity<UserAudioPreferences>();
@ -371,11 +349,7 @@ public class DramaLingDbContext : DbContext
.HasForeignKey(pa => pa.FlashcardId) .HasForeignKey(pa => pa.FlashcardId)
.OnDelete(DeleteBehavior.SetNull); .OnDelete(DeleteBehavior.SetNull);
modelBuilder.Entity<PronunciationAssessment>() // StudySession relationship removed
.HasOne(pa => pa.StudySession)
.WithMany()
.HasForeignKey(pa => pa.StudySessionId)
.OnDelete(DeleteBehavior.SetNull);
// UserAudioPreferences relationship // UserAudioPreferences relationship
modelBuilder.Entity<UserAudioPreferences>() modelBuilder.Entity<UserAudioPreferences>()

124
backend/DramaLing.Api/Models/Configuration/SpacedRepetitionOptions.cs
View File

@ -1,124 +0,0 @@
namespace DramaLing.Api.Models.Configuration;
/// <summary>
/// 智能複習系統配置選項
/// </summary>
public class SpacedRepetitionOptions
{
public const string SectionName = "SpacedRepetition";
/// <summary>
/// 間隔增長係數 (基於演算法規格書)
/// </summary>
public GrowthFactors GrowthFactors { get; set; } = new();
/// <summary>
/// 逾期懲罰係數
/// </summary>
public OverduePenalties OverduePenalties { get; set; } = new();
/// <summary>
/// 記憶衰減率 (每天百分比)
/// </summary>
public double MemoryDecayRate { get; set; } = 0.05;
/// <summary>
/// 最大間隔天數
/// </summary>
public int MaxInterval { get; set; } = 365;
/// <summary>
/// A1學習者保護門檻
/// </summary>
public int A1ProtectionLevel { get; set; } = 20;
/// <summary>
/// 新用戶預設程度
/// </summary>
public int DefaultUserLevel { get; set; } = 50;
}
/// <summary>
/// 間隔增長係數配置
/// </summary>
public class GrowthFactors
{
/// <summary>
/// 短期間隔係數 (≤7天)
/// </summary>
public double ShortTerm { get; set; } = 1.8;
/// <summary>
/// 中期間隔係數 (8-30天)
/// </summary>
public double MediumTerm { get; set; } = 1.4;
/// <summary>
/// 長期間隔係數 (31-90天)
/// </summary>
public double LongTerm { get; set; } = 1.2;
/// <summary>
/// 超長期間隔係數 (>90天)
/// </summary>
public double VeryLongTerm { get; set; } = 1.1;
/// <summary>
/// 根據當前間隔獲取增長係數
/// </summary>
/// <param name="currentInterval">當前間隔天數</param>
/// <returns>對應的增長係數</returns>
public double GetGrowthFactor(int currentInterval)
{
return currentInterval switch
{
<= 7 => ShortTerm,
<= 30 => MediumTerm,
<= 90 => LongTerm,
_ => VeryLongTerm
};
}
}
/// <summary>
/// 逾期懲罰係數配置
/// </summary>
public class OverduePenalties
{
/// <summary>
/// 輕度逾期係數 (1-3天)
/// </summary>
public double Light { get; set; } = 0.9;
/// <summary>
/// 中度逾期係數 (4-7天)
/// </summary>
public double Medium { get; set; } = 0.75;
/// <summary>
/// 重度逾期係數 (8-30天)
/// </summary>
public double Heavy { get; set; } = 0.5;
/// <summary>
/// 極度逾期係數 (>30天)
/// </summary>
public double Extreme { get; set; } = 0.3;
/// <summary>
/// 根據逾期天數獲取懲罰係數
/// </summary>
/// <param name="overdueDays">逾期天數</param>
/// <returns>對應的懲罰係數</returns>
public double GetPenaltyFactor(int overdueDays)
{
return overdueDays switch
{
<= 0 => 1.0, // 準時，無懲罰
<= 3 => Light, // 輕度逾期
<= 7 => Medium, // 中度逾期
<= 30 => Heavy, // 重度逾期
_ => Extreme // 極度逾期
};
}
}

28
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/OptimalModeRequest.cs
View File

@ -1,28 +0,0 @@
using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 自動選擇最適合複習模式請求 (基於CEFR等級)
/// </summary>
public class OptimalModeRequest
{
/// <summary>
/// 學習者CEFR等級 (A1, A2, B1, B2, C1, C2)
/// </summary>
[Required]
[MaxLength(10)]
public string UserCEFRLevel { get; set; } = "B1";
/// <summary>
/// 詞彙CEFR等級 (A1, A2, B1, B2, C1, C2)
/// </summary>
[Required]
[MaxLength(10)]
public string WordCEFRLevel { get; set; } = "B1";
/// <summary>
/// 是否包含歷史記錄進行智能避重
/// </summary>
public bool IncludeHistory { get; set; } = true;
}

42
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/QuestionData.cs
View File

@ -1,42 +0,0 @@
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 題目數據響應
/// </summary>
public class QuestionData
{
/// <summary>
/// 題型類型
/// </summary>
public string QuestionType { get; set; } = string.Empty;
/// <summary>
/// 選擇題選項 (用於vocab-choice, sentence-listening)
/// </summary>
public string[]? Options { get; set; }
/// <summary>
/// 正確答案
/// </summary>
public string CorrectAnswer { get; set; } = string.Empty;
/// <summary>
/// 音頻URL (用於聽力題)
/// </summary>
public string? AudioUrl { get; set; }
/// <summary>
/// 完整例句 (用於sentence-listening)
/// </summary>
public string? Sentence { get; set; }
/// <summary>
/// 挖空例句 (用於sentence-fill)
/// </summary>
public string? BlankedSentence { get; set; }
/// <summary>
/// 打亂的單字 (用於sentence-reorder)
/// </summary>
public string[]? ScrambledWords { get; set; }
}

16
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/QuestionRequest.cs
View File

@ -1,16 +0,0 @@
using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 題目生成請求
/// </summary>
public class QuestionRequest
{
/// <summary>
/// 題型類型
/// </summary>
[Required]
[RegularExpression("^(vocab-choice|sentence-listening|sentence-fill|sentence-reorder)$")]
public string QuestionType { get; set; } = string.Empty;
}

27
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/ReviewModeResult.cs
View File

@ -1,27 +0,0 @@
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 智能複習模式選擇結果
/// </summary>
public class ReviewModeResult
{
/// <summary>
/// 系統選擇的複習模式
/// </summary>
public string SelectedMode { get; set; } = string.Empty;
/// <summary>
/// 選擇原因說明
/// </summary>
public string Reason { get; set; } = string.Empty;
/// <summary>
/// 可用的複習模式列表
/// </summary>
public string[] AvailableModes { get; set; } = Array.Empty<string>();
/// <summary>
/// 適配情境描述
/// </summary>
public string AdaptationContext { get; set; } = string.Empty;
}

43
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/ReviewRequest.cs
View File

@ -1,43 +0,0 @@
using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 復習結果提交請求
/// </summary>
public class ReviewRequest
{
/// <summary>
/// 答題是否正確
/// </summary>
[Required]
public bool IsCorrect { get; set; }
/// <summary>
/// 信心程度 (1-5，翻卡題必須)
/// </summary>
[Range(1, 5)]
public int? ConfidenceLevel { get; set; }
/// <summary>
/// 題型類型
/// </summary>
[Required]
[RegularExpression("^(flip-memory|vocab-choice|vocab-listening|sentence-listening|sentence-fill|sentence-reorder|sentence-speaking)$")]
public string QuestionType { get; set; } = string.Empty;
/// <summary>
/// 用戶的答案 (可選)
/// </summary>
public string? UserAnswer { get; set; }
/// <summary>
/// 答題時間 (毫秒)
/// </summary>
public long? TimeTaken { get; set; }
/// <summary>
/// 時間戳記
/// </summary>
public long Timestamp { get; set; } = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
}

52
backend/DramaLing.Api/Models/DTOs/SpacedRepetition/ReviewResult.cs
View File

@ -1,52 +0,0 @@
namespace DramaLing.Api.Models.DTOs.SpacedRepetition;
/// <summary>
/// 復習結果響應
/// </summary>
public class ReviewResult
{
/// <summary>
/// 新的間隔天數
/// </summary>
public int NewInterval { get; set; }
/// <summary>
/// 下次復習日期
/// </summary>
public DateTime NextReviewDate { get; set; }
/// <summary>
/// 更新後的熟悉度
/// </summary>
public int MasteryLevel { get; set; }
/// <summary>
/// 當前熟悉度 (考慮衰減)
/// </summary>
public int CurrentMasteryLevel { get; set; }
/// <summary>
/// 是否逾期
/// </summary>
public bool IsOverdue { get; set; }
/// <summary>
/// 逾期天數
/// </summary>
public int OverdueDays { get; set; }
/// <summary>
/// 表現係數 (調試用)
/// </summary>
public double PerformanceFactor { get; set; }
/// <summary>
/// 增長係數 (調試用)
/// </summary>
public double GrowthFactor { get; set; }
/// <summary>
/// 逾期懲罰係數 (調試用)
/// </summary>
public double PenaltyFactor { get; set; }
}

42
backend/DramaLing.Api/Models/Entities/Flashcard.cs
View File

@ -2,6 +2,9 @@ using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.Entities; namespace DramaLing.Api.Models.Entities;
/// <summary>
/// 簡化的詞卡實體 - 移除所有複習功能
/// </summary>
public class Flashcard public class Flashcard
{ {
public Guid Id { get; set; } public Guid Id { get; set; }
@ -16,8 +19,7 @@ public class Flashcard
[Required] [Required]
public string Translation { get; set; } = string.Empty; public string Translation { get; set; } = string.Empty;
[Required] public string? Definition { get; set; }
public string Definition { get; set; } = string.Empty;
[MaxLength(50)] [MaxLength(50)]
public string? PartOfSpeech { get; set; } public string? PartOfSpeech { get; set; }
@ -29,32 +31,7 @@ public class Flashcard
public string? ExampleTranslation { get; set; } public string? ExampleTranslation { get; set; }
[MaxLength(1000)] // 基本狀態
public string? FilledQuestionText { get; set; }
[MaxLength(2000)]
public string? Synonyms { get; set; } // JSON 格式儲存同義詞列表
// SM-2 算法參數
public float EasinessFactor { get; set; } = 2.5f;
public int Repetitions { get; set; } = 0;
public int IntervalDays { get; set; } = 1;
public DateTime NextReviewDate { get; set; } = DateTime.Today;
// 學習統計
[Range(0, 100)]
public int MasteryLevel { get; set; } = 0;
public int TimesReviewed { get; set; } = 0;
public int TimesCorrect { get; set; } = 0;
public DateTime? LastReviewedAt { get; set; }
// 狀態
public bool IsFavorite { get; set; } = false; public bool IsFavorite { get; set; } = false;
public bool IsArchived { get; set; } = false; public bool IsArchived { get; set; } = false;
@ -62,20 +39,11 @@ public class Flashcard
[MaxLength(10)] [MaxLength(10)]
public string? DifficultyLevel { get; set; } // A1, A2, B1, B2, C1, C2 public string? DifficultyLevel { get; set; } // A1, A2, B1, B2, C1, C2
// 🆕 智能複習系統欄位
// UserLevel和WordLevel已移除 - 改用即時CEFR轉換
public string? ReviewHistory { get; set; } // JSON格式的復習歷史
[MaxLength(50)]
public string? LastQuestionType { get; set; } // 最後使用的題型
public DateTime CreatedAt { get; set; } = DateTime.UtcNow; public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
public DateTime UpdatedAt { get; set; } = DateTime.UtcNow; public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
// Navigation Properties // Navigation Properties
public virtual User User { get; set; } = null!; public virtual User User { get; set; } = null!;
public virtual ICollection<StudyRecord> StudyRecords { get; set; } = new List<StudyRecord>();
public virtual ICollection<FlashcardTag> FlashcardTags { get; set; } = new List<FlashcardTag>(); public virtual ICollection<FlashcardTag> FlashcardTags { get; set; } = new List<FlashcardTag>();
public virtual ICollection<ErrorReport> ErrorReports { get; set; } = new List<ErrorReport>(); public virtual ICollection<ErrorReport> ErrorReports { get; set; } = new List<ErrorReport>();
public virtual ICollection<FlashcardExampleImage> FlashcardExampleImages { get; set; } = new List<FlashcardExampleImage>(); public virtual ICollection<FlashcardExampleImage> FlashcardExampleImages { get; set; } = new List<FlashcardExampleImage>();

4
backend/DramaLing.Api/Models/Entities/PronunciationAssessment.cs
View File

@ -29,7 +29,7 @@ public class PronunciationAssessment
public string[]? Suggestions { get; set; } public string[]? Suggestions { get; set; }
// 學習情境 // 學習情境
public Guid? StudySessionId { get; set; } // StudySessionId removed
[MaxLength(20)] [MaxLength(20)]
public string PracticeMode { get; set; } = "word"; // 'word', 'sentence', 'conversation' public string PracticeMode { get; set; } = "word"; // 'word', 'sentence', 'conversation'
@ -39,5 +39,5 @@ public class PronunciationAssessment
// Navigation properties // Navigation properties
public User User { get; set; } = null!; public User User { get; set; } = null!;
public Flashcard? Flashcard { get; set; } public Flashcard? Flashcard { get; set; }
public StudySession? StudySession { get; set; } // StudySession reference removed
} }

95
backend/DramaLing.Api/Models/Entities/StudyCard.cs
View File

@ -1,95 +0,0 @@
using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.Entities;
/// <summary>
/// 學習會話中的詞卡進度追蹤
/// </summary>
public class StudyCard
{
public Guid Id { get; set; }
public Guid StudySessionId { get; set; }
public Guid FlashcardId { get; set; }
[Required]
[MaxLength(100)]
public string Word { get; set; } = string.Empty;
/// <summary>
/// 該詞卡預定的測驗類型列表 (JSON序列化)
/// 例如: ["flip-memory", "vocab-choice", "sentence-fill"]
/// </summary>
[Required]
public string PlannedTestsJson { get; set; } = string.Empty;
/// <summary>
/// 詞卡在會話中的順序
/// </summary>
public int Order { get; set; }
/// <summary>
/// 是否已完成所有測驗
/// </summary>
public bool IsCompleted { get; set; } = false;
/// <summary>
/// 詞卡學習開始時間
/// </summary>
public DateTime StartedAt { get; set; } = DateTime.UtcNow;
/// <summary>
/// 詞卡學習完成時間
/// </summary>
public DateTime? CompletedAt { get; set; }
// Navigation Properties
public virtual StudySession StudySession { get; set; } = null!;
public virtual Flashcard Flashcard { get; set; } = null!;
public virtual ICollection<TestResult> TestResults { get; set; } = new List<TestResult>();
// Helper Properties (不映射到資料庫)
public List<string> PlannedTests
{
get => string.IsNullOrEmpty(PlannedTestsJson)
? new List<string>()
: System.Text.Json.JsonSerializer.Deserialize<List<string>>(PlannedTestsJson) ?? new List<string>();
set => PlannedTestsJson = System.Text.Json.JsonSerializer.Serialize(value);
}
public int CompletedTestsCount => TestResults?.Count ?? 0;
public int PlannedTestsCount => PlannedTests.Count;
public bool AllTestsCompleted => CompletedTestsCount >= PlannedTestsCount;
}
/// <summary>
/// 詞卡內的測驗結果記錄
/// </summary>
public class TestResult
{
public Guid Id { get; set; }
public Guid StudyCardId { get; set; }
[Required]
[MaxLength(50)]
public string TestType { get; set; } = string.Empty; // flip-memory, vocab-choice, etc.
public bool IsCorrect { get; set; }
public string? UserAnswer { get; set; }
/// <summary>
/// 信心等級 (1-5, 主要用於翻卡記憶測驗)
/// </summary>
[Range(1, 5)]
public int? ConfidenceLevel { get; set; }
public int ResponseTimeMs { get; set; }
public DateTime CompletedAt { get; set; } = DateTime.UtcNow;
// Navigation Properties
public virtual StudyCard StudyCard { get; set; } = null!;
}

116
backend/DramaLing.Api/Models/Entities/StudySession.cs
View File

@ -1,116 +0,0 @@
using System.ComponentModel.DataAnnotations;
namespace DramaLing.Api.Models.Entities;
/// <summary>
/// 會話狀態枚舉
/// </summary>
public enum SessionStatus
{
Active, // 進行中
Completed, // 已完成
Paused, // 暫停
Abandoned // 放棄
}
/// <summary>
/// 學習會話實體 (擴展版本)
/// </summary>
public class StudySession
{
public Guid Id { get; set; }
public Guid UserId { get; set; }
[Required]
[MaxLength(50)]
public string SessionType { get; set; } = string.Empty; // flip, quiz, fill, listening, speaking
public DateTime StartedAt { get; set; } = DateTime.UtcNow;
public DateTime? EndedAt { get; set; }
public int TotalCards { get; set; } = 0;
public int CorrectCount { get; set; } = 0;
public int DurationSeconds { get; set; } = 0;
public int AverageResponseTimeMs { get; set; } = 0;
/// <summary>
/// 會話狀態
/// </summary>
public SessionStatus Status { get; set; } = SessionStatus.Active;
/// <summary>
/// 當前詞卡索引 (從0開始)
/// </summary>
public int CurrentCardIndex { get; set; } = 0;
/// <summary>
/// 當前測驗類型
/// </summary>
[MaxLength(50)]
public string? CurrentTestType { get; set; }
/// <summary>
/// 總測驗數量 (所有詞卡的測驗總和)
/// </summary>
public int TotalTests { get; set; } = 0;
/// <summary>
/// 已完成測驗數量
/// </summary>
public int CompletedTests { get; set; } = 0;
/// <summary>
/// 已完成詞卡數量
/// </summary>
public int CompletedCards { get; set; } = 0;
// Navigation Properties
public virtual User User { get; set; } = null!;
public virtual ICollection<StudyRecord> StudyRecords { get; set; } = new List<StudyRecord>();
public virtual ICollection<StudyCard> StudyCards { get; set; } = new List<StudyCard>();
}
public class StudyRecord
{
public Guid Id { get; set; }
public Guid UserId { get; set; }
public Guid FlashcardId { get; set; }
public Guid SessionId { get; set; }
[Required]
[MaxLength(50)]
public string StudyMode { get; set; } = string.Empty;
[Range(1, 5)]
public int QualityRating { get; set; }
public int? ResponseTimeMs { get; set; }
public string? UserAnswer { get; set; }
public bool IsCorrect { get; set; }
// SM-2 算法記錄
public float PreviousEasinessFactor { get; set; }
public float NewEasinessFactor { get; set; }
public int PreviousIntervalDays { get; set; }
public int NewIntervalDays { get; set; }
public int PreviousRepetitions { get; set; }
public int NewRepetitions { get; set; }
public DateTime NextReviewDate { get; set; }
public DateTime StudiedAt { get; set; } = DateTime.UtcNow;
// Navigation Properties
public virtual User User { get; set; } = null!;
public virtual Flashcard Flashcard { get; set; } = null!;
public virtual StudySession Session { get; set; } = null!;
}

2
backend/DramaLing.Api/Models/Entities/User.cs
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@ -45,7 +45,7 @@ public class User
// Navigation Properties // Navigation Properties
public virtual ICollection<Flashcard> Flashcards { get; set; } = new List<Flashcard>(); public virtual ICollection<Flashcard> Flashcards { get; set; } = new List<Flashcard>();
public virtual UserSettings? Settings { get; set; } public virtual UserSettings? Settings { get; set; }
public virtual ICollection<StudySession> StudySessions { get; set; } = new List<StudySession>(); // StudySession collection removed
public virtual ICollection<ErrorReport> ErrorReports { get; set; } = new List<ErrorReport>(); public virtual ICollection<ErrorReport> ErrorReports { get; set; } = new List<ErrorReport>();
public virtual ICollection<DailyStats> DailyStats { get; set; } = new List<DailyStats>(); public virtual ICollection<DailyStats> DailyStats { get; set; } = new List<DailyStats>();
} }

15
backend/DramaLing.Api/Program.cs
View File

@ -88,21 +88,12 @@ builder.Services.AddHttpClient<IGeminiService, GeminiService>();
builder.Services.AddScoped<IAnalysisService, AnalysisService>(); builder.Services.AddScoped<IAnalysisService, AnalysisService>();
builder.Services.AddScoped<IUsageTrackingService, UsageTrackingService>(); builder.Services.AddScoped<IUsageTrackingService, UsageTrackingService>();
builder.Services.AddScoped<IAzureSpeechService, AzureSpeechService>(); builder.Services.AddScoped<IAzureSpeechService, AzureSpeechService>();
// 智能填空題系統服務 // 智能填空題系統服務已移除
builder.Services.AddScoped<IWordVariationService, WordVariationService>();
builder.Services.AddScoped<IBlankGenerationService, BlankGenerationService>();
builder.Services.AddScoped<IAudioCacheService, AudioCacheService>(); builder.Services.AddScoped<IAudioCacheService, AudioCacheService>();
// 🆕 智能複習服務註冊 // 智能複習服務已移除，準備重新實施
builder.Services.Configure<SpacedRepetitionOptions>(
builder.Configuration.GetSection(SpacedRepetitionOptions.SectionName));
builder.Services.AddScoped<ISpacedRepetitionService, SpacedRepetitionService>();
builder.Services.AddScoped<IReviewTypeSelectorService, ReviewTypeSelectorService>();
builder.Services.AddScoped<IQuestionGeneratorService, QuestionGeneratorService>();
// 🆕 學習會話服務註冊 // 學習會話服務已清理移除
builder.Services.AddScoped<IStudySessionService, StudySessionService>();
builder.Services.AddScoped<IReviewModeSelector, ReviewModeSelector>();
// 🆕 選項詞彙庫服務註冊 // 🆕 選項詞彙庫服務註冊
builder.Services.Configure<OptionsVocabularyOptions>( builder.Services.Configure<OptionsVocabularyOptions>(

138
backend/DramaLing.Api/Services/BlankGenerationService.cs
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@ -1,138 +0,0 @@
using System.Text.RegularExpressions;
namespace DramaLing.Api.Services;
public interface IBlankGenerationService
{
Task<string?> GenerateBlankQuestionAsync(string word, string example);
string? TryProgrammaticBlank(string word, string example);
Task<string?> GenerateAIBlankAsync(string word, string example);
bool HasValidBlank(string blankQuestion);
}
public class BlankGenerationService : IBlankGenerationService
{
private readonly IWordVariationService _wordVariationService;
private readonly IGeminiService _geminiService;
private readonly ILogger<BlankGenerationService> _logger;
public BlankGenerationService(
IWordVariationService wordVariationService,
IGeminiService geminiService,
ILogger<BlankGenerationService> logger)
{
_wordVariationService = wordVariationService;
_geminiService = geminiService;
_logger = logger;
}
public async Task<string?> GenerateBlankQuestionAsync(string word, string example)
{
if (string.IsNullOrEmpty(word) || string.IsNullOrEmpty(example))
{
_logger.LogWarning("Invalid input - word or example is null/empty");
return null;
}
_logger.LogInformation("Generating blank question for word: {Word}, example: {Example}",
word, example);
// Step 1: 嘗試程式碼挖空
var programmaticResult = TryProgrammaticBlank(word, example);
if (!string.IsNullOrEmpty(programmaticResult))
{
_logger.LogInformation("Successfully generated programmatic blank for word: {Word}", word);
return programmaticResult;
}
// Step 2: 程式碼挖空失敗，嘗試 AI 挖空
_logger.LogInformation("Programmatic blank failed for word: {Word}, trying AI blank", word);
var aiResult = await GenerateAIBlankAsync(word, example);
if (!string.IsNullOrEmpty(aiResult))
{
_logger.LogInformation("Successfully generated AI blank for word: {Word}", word);
return aiResult;
}
_logger.LogWarning("Both programmatic and AI blank generation failed for word: {Word}", word);
return null;
}
public string? TryProgrammaticBlank(string word, string example)
{
try
{
_logger.LogDebug("Attempting programmatic blank for word: {Word}", word);
// 1. 完全匹配 (不區分大小寫)
var exactMatch = Regex.Replace(example, $@"\b{Regex.Escape(word)}\b", "____", RegexOptions.IgnoreCase);
if (exactMatch != example)
{
_logger.LogDebug("Exact match blank successful for word: {Word}", word);
return exactMatch;
}
// 2. 常見變形處理
var variations = _wordVariationService.GetCommonVariations(word);
foreach(var variation in variations)
{
var variantMatch = Regex.Replace(example, $@"\b{Regex.Escape(variation)}\b", "____", RegexOptions.IgnoreCase);
if (variantMatch != example)
{
_logger.LogDebug("Variation match blank successful for word: {Word}, variation: {Variation}",
word, variation);
return variantMatch;
}
}
_logger.LogDebug("Programmatic blank failed for word: {Word}", word);
return null; // 挖空失敗
}
catch (Exception ex)
{
_logger.LogError(ex, "Error in programmatic blank for word: {Word}", word);
return null;
}
}
public async Task<string?> GenerateAIBlankAsync(string word, string example)
{
try
{
var prompt = $@"
請將以下例句中與詞彙「{word}」相關的詞挖空，用____替代：
詞彙: {word}
例句: {example}
規則:
1. 只挖空與目標詞彙相關的詞(包含變形、時態、複數等)
2. 用____替代被挖空的詞
3. 保持句子其他部分不變
4. 直接返回挖空後的句子，不要額外說明
挖空後的句子:";
_logger.LogInformation("Generating AI blank for word: {Word}, example: {Example}",
word, example);
// 暫時使用程式碼邏輯，AI 功能將在後續版本實現
// TODO: 整合 Gemini API 進行智能挖空
_logger.LogInformation("AI blank generation not yet implemented, returning null");
return null;
}
catch (Exception ex)
{
_logger.LogError(ex, "Error generating AI blank for word: {Word}", word);
return null;
}
}
public bool HasValidBlank(string blankQuestion)
{
var isValid = !string.IsNullOrEmpty(blankQuestion) && blankQuestion.Contains("____");
_logger.LogDebug("Validating blank question: {IsValid}", isValid);
return isValid;
}
}

254
backend/DramaLing.Api/Services/Domain/Learning/ISpacedRepetitionService.cs
View File

@ -1,254 +0,0 @@
using DramaLing.Api.Services;
namespace DramaLing.Api.Services.Domain.Learning;
/// <summary>
/// 間隔重複學習服務介面
/// </summary>
public interface ISpacedRepetitionService
{
/// <summary>
/// 計算下次複習時間
/// </summary>
Task<ReviewSchedule> CalculateNextReviewAsync(ReviewInput input);
/// <summary>
/// 更新學習進度
/// </summary>
Task<StudyProgress> UpdateStudyProgressAsync(Guid flashcardId, int qualityRating, Guid userId);
/// <summary>
/// 取得今日應複習的詞卡
/// </summary>
Task<IEnumerable<ReviewCard>> GetDueCardsAsync(Guid userId, int limit = 20);
/// <summary>
/// 取得學習統計
/// </summary>
Task<LearningAnalytics> GetLearningAnalyticsAsync(Guid userId);
/// <summary>
/// 優化學習序列
/// </summary>
Task<OptimizedStudyPlan> GenerateStudyPlanAsync(Guid userId, int targetMinutes);
}
/// <summary>
/// 複習輸入參數
/// </summary>
public class ReviewInput
{
public Guid FlashcardId { get; set; }
public Guid UserId { get; set; }
public int QualityRating { get; set; } // 1-5 (SM2 標準)
public int CurrentRepetitions { get; set; }
public float CurrentEasinessFactor { get; set; }
public int CurrentIntervalDays { get; set; }
public DateTime LastReviewDate { get; set; }
}
/// <summary>
/// 複習排程結果
/// </summary>
public class ReviewSchedule
{
public DateTime NextReviewDate { get; set; }
public int NewIntervalDays { get; set; }
public float NewEasinessFactor { get; set; }
public int NewRepetitions { get; set; }
public int NewMasteryLevel { get; set; }
public string RecommendedAction { get; set; } = string.Empty;
}
/// <summary>
/// 學習進度
/// </summary>
public class StudyProgress
{
public Guid FlashcardId { get; set; }
public bool IsImproved { get; set; }
public int PreviousMasteryLevel { get; set; }
public int NewMasteryLevel { get; set; }
public DateTime NextReviewDate { get; set; }
public string ProgressMessage { get; set; } = string.Empty;
}
/// <summary>
/// 複習卡片
/// </summary>
public class ReviewCard
{
public Guid Id { get; set; }
public string Word { get; set; } = string.Empty;
public string Translation { get; set; } = string.Empty;
public string DifficultyLevel { get; set; } = string.Empty;
public int MasteryLevel { get; set; }
public DateTime NextReviewDate { get; set; }
public int DaysSinceLastReview { get; set; }
public int ReviewPriority { get; set; } // 1-5 (5 最高)
}
/// <summary>
/// 學習分析
/// </summary>
public class LearningAnalytics
{
public int TotalCards { get; set; }
public int DueCards { get; set; }
public int OverdueCards { get; set; }
public int MasteredCards { get; set; }
public double RetentionRate { get; set; }
public TimeSpan AverageStudyInterval { get; set; }
public Dictionary<string, int> DifficultyDistribution { get; set; } = new();
public List<DailyStudyStats> RecentPerformance { get; set; } = new();
}
/// <summary>
/// 每日學習統計
/// </summary>
public class DailyStudyStats
{
public DateOnly Date { get; set; }
public int CardsReviewed { get; set; }
public int CorrectAnswers { get; set; }
public double AccuracyRate => CardsReviewed > 0 ? (double)CorrectAnswers / CardsReviewed : 0;
public TimeSpan StudyDuration { get; set; }
}
/// <summary>
/// 優化學習計劃
/// </summary>
public class OptimizedStudyPlan
{
public IEnumerable<ReviewCard> RecommendedCards { get; set; } = new List<ReviewCard>();
public int EstimatedMinutes { get; set; }
public string StudyFocus { get; set; } = string.Empty; // "複習", "新學習", "加強練習"
public Dictionary<string, int> LevelBreakdown { get; set; } = new();
public string RecommendationReason { get; set; } = string.Empty;
}
/// <summary>
/// 間隔重複學習服務實作
/// </summary>
public class SpacedRepetitionService : ISpacedRepetitionService
{
private readonly ILogger<SpacedRepetitionService> _logger;
public SpacedRepetitionService(ILogger<SpacedRepetitionService> logger)
{
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
}
public Task<ReviewSchedule> CalculateNextReviewAsync(ReviewInput input)
{
try
{
// 使用現有的 SM2Algorithm
var sm2Input = new SM2Input(
input.QualityRating,
input.CurrentEasinessFactor,
input.CurrentRepetitions,
input.CurrentIntervalDays
);
var sm2Result = SM2Algorithm.Calculate(sm2Input);
var schedule = new ReviewSchedule
{
NextReviewDate = sm2Result.NextReviewDate,
NewIntervalDays = sm2Result.IntervalDays,
NewEasinessFactor = sm2Result.EasinessFactor,
NewRepetitions = sm2Result.Repetitions,
NewMasteryLevel = CalculateMasteryLevel(sm2Result.EasinessFactor, sm2Result.Repetitions),
RecommendedAction = GetRecommendedAction(input.QualityRating)
};
return Task.FromResult(schedule);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error calculating next review for flashcard {FlashcardId}", input.FlashcardId);
throw;
}
}
public Task<StudyProgress> UpdateStudyProgressAsync(Guid flashcardId, int qualityRating, Guid userId)
{
// 這裡應該整合 Repository 來獲取和更新詞卡數據
// 暫時返回模擬結果
var progress = new StudyProgress
{
FlashcardId = flashcardId,
IsImproved = qualityRating >= 3,
ProgressMessage = GetProgressMessage(qualityRating)
};
return Task.FromResult(progress);
}
public Task<IEnumerable<ReviewCard>> GetDueCardsAsync(Guid userId, int limit = 20)
{
// 需要整合 Repository 來實作
var cards = new List<ReviewCard>();
return Task.FromResult<IEnumerable<ReviewCard>>(cards);
}
public Task<LearningAnalytics> GetLearningAnalyticsAsync(Guid userId)
{
// 需要整合 Repository 來實作
var analytics = new LearningAnalytics();
return Task.FromResult(analytics);
}
public Task<OptimizedStudyPlan> GenerateStudyPlanAsync(Guid userId, int targetMinutes)
{
// 需要整合 Repository 和 AI 服務來實作
var plan = new OptimizedStudyPlan
{
EstimatedMinutes = targetMinutes,
StudyFocus = "複習",
RecommendationReason = "基於間隔重複算法的個人化推薦"
};
return Task.FromResult(plan);
}
#region 私有方法
private int CalculateMasteryLevel(float easinessFactor, int repetitions)
{
// 根據難度係數和重複次數計算掌握程度
if (repetitions >= 5 && easinessFactor >= 2.3f) return 5; // 完全掌握
if (repetitions >= 3 && easinessFactor >= 2.0f) return 4; // 熟練
if (repetitions >= 2 && easinessFactor >= 1.8f) return 3; // 理解
if (repetitions >= 1) return 2; // 認識
return 1; // 新學習
}
private string GetRecommendedAction(int qualityRating)
{
return qualityRating switch
{
1 => "建議重新學習此詞彙",
2 => "需要額外練習",
3 => "繼續複習",
4 => "掌握良好",
5 => "完全掌握",
_ => "繼續學習"
};
}
private string GetProgressMessage(int qualityRating)
{
return qualityRating switch
{
1 or 2 => "需要加強練習，別氣餒！",
3 => "不錯的進步！",
4 => "很好！掌握得不錯",
5 => "太棒了！完全掌握",
_ => "繼續努力學習！"
};
}
#endregion
}

284
backend/DramaLing.Api/Services/QuestionGeneratorService.cs
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@ -1,284 +0,0 @@
using DramaLing.Api.Data;
using DramaLing.Api.Models.DTOs.SpacedRepetition;
using DramaLing.Api.Models.Entities;
using Microsoft.EntityFrameworkCore;
namespace DramaLing.Api.Services;
/// <summary>
/// 題目生成服務介面
/// </summary>
public interface IQuestionGeneratorService
{
Task<QuestionData> GenerateQuestionAsync(Guid flashcardId, string questionType);
}
/// <summary>
/// 題目生成服務實現
/// </summary>
public class QuestionGeneratorService : IQuestionGeneratorService
{
private readonly DramaLingDbContext _context;
private readonly IOptionsVocabularyService _optionsVocabularyService;
private readonly ILogger<QuestionGeneratorService> _logger;
public QuestionGeneratorService(
DramaLingDbContext context,
IOptionsVocabularyService optionsVocabularyService,
ILogger<QuestionGeneratorService> logger)
{
_context = context;
_optionsVocabularyService = optionsVocabularyService;
_logger = logger;
}
/// <summary>
/// 根據題型生成對應的題目數據
/// </summary>
public async Task<QuestionData> GenerateQuestionAsync(Guid flashcardId, string questionType)
{
var flashcard = await _context.Flashcards.FindAsync(flashcardId);
if (flashcard == null)
throw new ArgumentException($"Flashcard {flashcardId} not found");
_logger.LogInformation("Generating {QuestionType} question for flashcard {FlashcardId}, word: {Word}",
questionType, flashcardId, flashcard.Word);
return questionType switch
{
"vocab-choice" => await GenerateVocabChoiceAsync(flashcard),
"sentence-fill" => GenerateFillBlankQuestion(flashcard),
"sentence-reorder" => GenerateReorderQuestion(flashcard),
"sentence-listening" => await GenerateSentenceListeningAsync(flashcard),
_ => new QuestionData
{
QuestionType = questionType,
CorrectAnswer = flashcard.Word
}
};
}
/// <summary>
/// 生成詞彙選擇題選項
/// </summary>
private async Task<QuestionData> GenerateVocabChoiceAsync(Flashcard flashcard)
{
var distractors = new List<string>();
// 🆕 優先嘗試使用智能詞彙庫生成選項
try
{
// 直接使用 Flashcard 的屬性
var cefrLevel = flashcard.DifficultyLevel ?? "B1"; // 預設為 B1
var partOfSpeech = flashcard.PartOfSpeech ?? "noun"; // 預設為 noun
_logger.LogDebug("Attempting to generate smart distractors for '{Word}' (CEFR: {CEFR}, PartOfSpeech: {PartOfSpeech})",
flashcard.Word, cefrLevel, partOfSpeech);
// 檢查詞彙庫是否有足夠詞彙
var hasSufficientVocab = await _optionsVocabularyService.HasSufficientVocabularyAsync(cefrLevel, partOfSpeech);
if (hasSufficientVocab)
{
var smartDistractors = await _optionsVocabularyService.GenerateDistractorsAsync(
flashcard.Word, cefrLevel, partOfSpeech, 3);
if (smartDistractors.Any())
{
distractors.AddRange(smartDistractors);
_logger.LogInformation("Successfully generated {Count} smart distractors for '{Word}'",
smartDistractors.Count, flashcard.Word);
}
}
}
catch (Exception ex)
{
_logger.LogWarning(ex, "Failed to generate smart distractors for '{Word}', falling back to user vocabulary",
flashcard.Word);
}
// 🔄 回退機制：如果智能詞彙庫無法提供足夠選項，使用原有邏輯
if (distractors.Count < 3)
{
_logger.LogInformation("Using fallback method for '{Word}' (current distractors: {Count})",
flashcard.Word, distractors.Count);
var userDistractors = await _context.Flashcards
.Where(f => f.UserId == flashcard.UserId &&
f.Id != flashcard.Id &&
!f.IsArchived &&
!distractors.Contains(f.Word)) // 避免重複
.OrderBy(x => Guid.NewGuid())
.Take(3 - distractors.Count)
.Select(f => f.Word)
.ToListAsync();
distractors.AddRange(userDistractors);
// 如果還是不夠，使用預設選項
while (distractors.Count < 3)
{
var defaultOptions = new[] { "example", "sample", "test", "word", "basic", "simple", "common", "usual" };
var availableDefaults = defaultOptions
.Where(opt => opt != flashcard.Word && !distractors.Contains(opt));
var neededCount = 3 - distractors.Count;
distractors.AddRange(availableDefaults.Take(neededCount));
// 防止無限循環
if (!availableDefaults.Any())
break;
}
}
var options = new List<string> { flashcard.Word };
options.AddRange(distractors.Take(3));
// 隨機打亂選項順序
var shuffledOptions = options.OrderBy(x => Guid.NewGuid()).ToArray();
return new QuestionData
{
QuestionType = "vocab-choice",
Options = shuffledOptions,
CorrectAnswer = flashcard.Word
};
}
/// <summary>
/// 生成填空題
/// </summary>
private QuestionData GenerateFillBlankQuestion(Flashcard flashcard)
{
if (string.IsNullOrEmpty(flashcard.Example))
{
throw new ArgumentException($"Flashcard {flashcard.Id} has no example sentence for fill-blank question");
}
// 在例句中將目標詞彙替換為空白
var blankedSentence = flashcard.Example.Replace(flashcard.Word, "______", StringComparison.OrdinalIgnoreCase);
// 如果沒有替換成功，嘗試其他變化形式
if (blankedSentence == flashcard.Example)
{
// TODO: 未來可以實現更智能的詞形變化識別
blankedSentence = flashcard.Example + " (請填入: " + flashcard.Word + ")";
}
return new QuestionData
{
QuestionType = "sentence-fill",
BlankedSentence = blankedSentence,
CorrectAnswer = flashcard.Word,
Sentence = flashcard.Example
};
}
/// <summary>
/// 生成例句重組題
/// </summary>
private QuestionData GenerateReorderQuestion(Flashcard flashcard)
{
if (string.IsNullOrEmpty(flashcard.Example))
{
throw new ArgumentException($"Flashcard {flashcard.Id} has no example sentence for reorder question");
}
// 將例句拆分為單字並打亂順序
var words = flashcard.Example
.Split(new[] { ' ', '\t', '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries)
.Select(word => word.Trim('.',',','!','?',';',':')) // 移除標點符號
.Where(word => !string.IsNullOrEmpty(word))
.ToArray();
// 隨機打亂順序
var scrambledWords = words.OrderBy(x => Guid.NewGuid()).ToArray();
return new QuestionData
{
QuestionType = "sentence-reorder",
ScrambledWords = scrambledWords,
CorrectAnswer = flashcard.Example,
Sentence = flashcard.Example
};
}
/// <summary>
/// 生成例句聽力題選項
/// </summary>
private async Task<QuestionData> GenerateSentenceListeningAsync(Flashcard flashcard)
{
if (string.IsNullOrEmpty(flashcard.Example))
{
throw new ArgumentException($"Flashcard {flashcard.Id} has no example sentence for listening question");
}
// 從其他詞卡中選擇3個例句作為干擾選項
var distractorSentences = await _context.Flashcards
.Where(f => f.UserId == flashcard.UserId &&
f.Id != flashcard.Id &&
!f.IsArchived &&
!string.IsNullOrEmpty(f.Example))
.OrderBy(x => Guid.NewGuid())
.Take(3)
.Select(f => f.Example!)
.ToListAsync();
// 如果沒有足夠的例句，添加預設選項
while (distractorSentences.Count < 3)
{
var defaultSentences = new[]
{
"This is a simple example sentence.",
"I think this is a good opportunity.",
"She decided to take a different approach.",
"They managed to solve the problem quickly."
};
var availableDefaults = defaultSentences
.Where(sent => sent != flashcard.Example && !distractorSentences.Contains(sent));
distractorSentences.AddRange(availableDefaults.Take(3 - distractorSentences.Count));
}
var options = new List<string> { flashcard.Example };
options.AddRange(distractorSentences.Take(3));
// 隨機打亂選項順序
var shuffledOptions = options.OrderBy(x => Guid.NewGuid()).ToArray();
return new QuestionData
{
QuestionType = "sentence-listening",
Options = shuffledOptions,
CorrectAnswer = flashcard.Example,
Sentence = flashcard.Example,
AudioUrl = $"/audio/sentences/{flashcard.Id}.mp3" // 未來音頻服務用
};
}
/// <summary>
/// 判斷是否為A1學習者
/// </summary>
public bool IsA1Learner(int userLevel) => userLevel <= 20; // 固定A1門檻
/// <summary>
/// 獲取適配情境描述
/// </summary>
public string GetAdaptationContext(int userLevel, int wordLevel)
{
var difficulty = wordLevel - userLevel;
if (userLevel <= 20) // 固定A1門檻
return "A1學習者";
if (difficulty < -10)
return "簡單詞彙";
if (difficulty >= -10 && difficulty <= 10)
return "適中詞彙";
return "困難詞彙";
}
}

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namespace DramaLing.Api.Services;
/// <summary>
/// 測驗模式選擇服務介面
/// </summary>
public interface IReviewModeSelector
{
List<string> GetPlannedTests(string userCEFRLevel, string wordCEFRLevel);
string GetNextTestType(List<string> plannedTests, List<string> completedTestTypes);
}
/// <summary>
/// 測驗模式選擇服務實現
/// </summary>
public class ReviewModeSelector : IReviewModeSelector
{
private readonly ILogger<ReviewModeSelector> _logger;
public ReviewModeSelector(ILogger<ReviewModeSelector> logger)
{
_logger = logger;
}
/// <summary>
/// 根據CEFR等級獲取預定的測驗類型列表
/// </summary>
public List<string> GetPlannedTests(string userCEFRLevel, string wordCEFRLevel)
{
var userLevel = GetCEFRLevel(userCEFRLevel);
var wordLevel = GetCEFRLevel(wordCEFRLevel);
var difficulty = wordLevel - userLevel;
_logger.LogDebug("Planning tests for user {UserCEFR} vs word {WordCEFR}, difficulty: {Difficulty}",
userCEFRLevel, wordCEFRLevel, difficulty);
if (userCEFRLevel == "A1")
{
// A1學習者：基礎保護機制
return new List<string> { "flip-memory", "vocab-choice", "vocab-listening" };
}
else if (difficulty < -10)
{
// 簡單詞彙：應用練習
return new List<string> { "sentence-fill", "sentence-reorder" };
}
else if (difficulty >= -10 && difficulty <= 10)
{
// 適中詞彙：全方位練習
return new List<string> { "sentence-fill", "sentence-reorder", "sentence-speaking" };
}
else
{
// 困難詞彙：基礎重建
return new List<string> { "flip-memory", "vocab-choice" };
}
}
/// <summary>
/// 獲取下一個測驗類型
/// </summary>
public string GetNextTestType(List<string> plannedTests, List<string> completedTestTypes)
{
var nextTest = plannedTests.FirstOrDefault(test => !completedTestTypes.Contains(test));
return nextTest ?? string.Empty;
}
/// <summary>
/// CEFR等級轉換為數值
/// </summary>
private int GetCEFRLevel(string cefrLevel)
{
return cefrLevel switch
{
"A1" => 20,
"A2" => 35,
"B1" => 50,
"B2" => 65,
"C1" => 80,
"C2" => 95,
_ => 50 // 預設B1
};
}
}

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backend/DramaLing.Api/Services/ReviewTypeSelectorService.cs
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using DramaLing.Api.Data;
using DramaLing.Api.Models.Configuration;
using DramaLing.Api.Models.DTOs.SpacedRepetition;
using DramaLing.Api.Models.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using System.Text.Json;
namespace DramaLing.Api.Services;
/// <summary>
/// 智能複習題型選擇服務介面 (基於CEFR等級)
/// </summary>
public interface IReviewTypeSelectorService
{
Task<ReviewModeResult> SelectOptimalReviewModeAsync(Guid flashcardId, string userCEFRLevel, string wordCEFRLevel);
string[] GetAvailableReviewTypes(string userCEFRLevel, string wordCEFRLevel);
bool IsA1Learner(string userCEFRLevel);
string GetAdaptationContext(string userCEFRLevel, string wordCEFRLevel);
}
/// <summary>
/// 智能複習題型選擇服務實現
/// </summary>
public class ReviewTypeSelectorService : IReviewTypeSelectorService
{
private readonly DramaLingDbContext _context;
private readonly ILogger<ReviewTypeSelectorService> _logger;
private readonly SpacedRepetitionOptions _options;
public ReviewTypeSelectorService(
DramaLingDbContext context,
ILogger<ReviewTypeSelectorService> logger,
IOptions<SpacedRepetitionOptions> options)
{
_context = context;
_logger = logger;
_options = options.Value;
}
/// <summary>
/// 智能選擇最適合的複習模式 (基於CEFR等級)
/// </summary>
public async Task<ReviewModeResult> SelectOptimalReviewModeAsync(Guid flashcardId, string userCEFRLevel, string wordCEFRLevel)
{
_logger.LogInformation("Selecting optimal review mode for flashcard {FlashcardId}, userCEFR: {UserCEFR}, wordCEFR: {WordCEFR}",
flashcardId, userCEFRLevel, wordCEFRLevel);
// 即時轉換CEFR等級為數值進行計算
var userLevel = CEFRMappingService.GetWordLevel(userCEFRLevel);
var wordLevel = CEFRMappingService.GetWordLevel(wordCEFRLevel);
_logger.LogInformation("CEFR converted to levels: {UserCEFR}→{UserLevel}, {WordCEFR}→{WordLevel}",
userCEFRLevel, userLevel, wordCEFRLevel, wordLevel);
// 1. 四情境判斷，獲取可用題型
var availableModes = GetAvailableReviewTypes(userLevel, wordLevel);
// 2. 檢查復習歷史，實現智能避重
var filteredModes = await ApplyAntiRepetitionLogicAsync(flashcardId, availableModes);
// 3. 智能選擇 (A1學習者權重選擇，其他隨機)
var selectedMode = SelectModeWithWeights(filteredModes, userLevel);
var adaptationContext = GetAdaptationContext(userLevel, wordLevel);
var reason = GetSelectionReason(selectedMode, userLevel, wordLevel);
_logger.LogInformation("Selected mode: {SelectedMode}, context: {Context}, reason: {Reason}",
selectedMode, adaptationContext, reason);
return new ReviewModeResult
{
SelectedMode = selectedMode,
AvailableModes = availableModes,
AdaptationContext = adaptationContext,
Reason = reason
};
}
/// <summary>
/// 四情境自動適配：根據學習者程度和詞彙難度決定可用題型
/// </summary>
public string[] GetAvailableReviewTypes(int userLevel, int wordLevel)
{
var difficulty = wordLevel - userLevel;
if (userLevel <= _options.A1ProtectionLevel)
{
// A1學習者 - 自動保護，只使用基礎題型
return new[] { "flip-memory", "vocab-choice", "vocab-listening" };
}
if (difficulty < -10)
{
// 簡單詞彙 (學習者程度 > 詞彙程度) - 應用練習
return new[] { "sentence-reorder", "sentence-fill" };
}
if (difficulty >= -10 && difficulty <= 10)
{
// 適中詞彙 (學習者程度 ≈ 詞彙程度) - 全方位練習
return new[] { "sentence-fill", "sentence-reorder", "sentence-speaking" };
}
// 困難詞彙 (學習者程度 < 詞彙程度) - 基礎重建
return new[] { "flip-memory", "vocab-choice" };
}
/// <summary>
/// 智能避重邏輯：避免連續使用相同題型
/// </summary>
private async Task<string[]> ApplyAntiRepetitionLogicAsync(Guid flashcardId, string[] availableModes)
{
try
{
var flashcard = await _context.Flashcards.FindAsync(flashcardId);
if (flashcard?.ReviewHistory == null)
return availableModes;
var history = JsonSerializer.Deserialize<List<ReviewRecord>>(flashcard.ReviewHistory) ?? new List<ReviewRecord>();
var recentModes = history.TakeLast(3).Select(r => r.QuestionType).ToList();
if (recentModes.Count >= 2 && recentModes.TakeLast(2).All(m => m == recentModes.Last()))
{
// 最近2次都是相同題型，避免使用
var filteredModes = availableModes.Where(m => m != recentModes.Last()).ToArray();
return filteredModes.Length > 0 ? filteredModes : availableModes;
}
return availableModes;
}
catch (Exception ex)
{
_logger.LogWarning(ex, "Failed to apply anti-repetition logic for flashcard {FlashcardId}", flashcardId);
return availableModes;
}
}
/// <summary>
/// 權重選擇模式 (A1學習者有權重，其他隨機)
/// </summary>
private string SelectModeWithWeights(string[] modes, int userLevel)
{
if (userLevel <= _options.A1ProtectionLevel)
{
// A1學習者權重分配
var weights = new Dictionary<string, double>
{
{ "flip-memory", 0.4 }, // 40% - 主要熟悉方式
{ "vocab-choice", 0.4 }, // 40% - 概念強化
{ "vocab-listening", 0.2 } // 20% - 發音練習
};
return WeightedRandomSelect(modes, weights);
}
// 其他情況隨機選擇
var random = new Random();
return modes[random.Next(modes.Length)];
}
/// <summary>
/// 權重隨機選擇
/// </summary>
private string WeightedRandomSelect(string[] items, Dictionary<string, double> weights)
{
var totalWeight = items.Sum(item => weights.GetValueOrDefault(item, 1.0 / items.Length));
var random = new Random().NextDouble() * totalWeight;
foreach (var item in items)
{
var weight = weights.GetValueOrDefault(item, 1.0 / items.Length);
random -= weight;
if (random <= 0)
return item;
}
return items[0]; // 備用返回
}
/// <summary>
/// 新增CEFR字符串版本的方法
/// </summary>
public string[] GetAvailableReviewTypes(string userCEFRLevel, string wordCEFRLevel)
{
var userLevel = CEFRMappingService.GetWordLevel(userCEFRLevel);
var wordLevel = CEFRMappingService.GetWordLevel(wordCEFRLevel);
return GetAvailableReviewTypes(userLevel, wordLevel);
}
public bool IsA1Learner(string userCEFRLevel) => userCEFRLevel == "A1";
public bool IsA1Learner(int userLevel) => userLevel <= _options.A1ProtectionLevel;
public string GetAdaptationContext(string userCEFRLevel, string wordCEFRLevel)
{
var userLevel = CEFRMappingService.GetWordLevel(userCEFRLevel);
var wordLevel = CEFRMappingService.GetWordLevel(wordCEFRLevel);
return GetAdaptationContext(userLevel, wordLevel);
}
/// <summary>
/// 獲取適配情境描述 (數值版本，內部使用)
/// </summary>
public string GetAdaptationContext(int userLevel, int wordLevel)
{
var difficulty = wordLevel - userLevel;
if (userLevel <= _options.A1ProtectionLevel)
return "A1學習者";
if (difficulty < -10)
return "簡單詞彙";
if (difficulty >= -10 && difficulty <= 10)
return "適中詞彙";
return "困難詞彙";
}
/// <summary>
/// 獲取選擇原因說明
/// </summary>
private string GetSelectionReason(string selectedMode, int userLevel, int wordLevel)
{
var context = GetAdaptationContext(userLevel, wordLevel);
return context switch
{
"A1學習者" => "A1學習者使用基礎題型建立信心",
"簡單詞彙" => "簡單詞彙重點練習應用和拼寫",
"適中詞彙" => "適中詞彙進行全方位練習",
"困難詞彙" => "困難詞彙回歸基礎重建記憶",
_ => "系統智能選擇"
};
}
}
/// <summary>
/// 復習記錄 (用於ReviewHistory JSON序列化)
/// </summary>
public record ReviewRecord(string QuestionType, bool IsCorrect, DateTime Date);

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backend/DramaLing.Api/Services/SM2Algorithm.cs
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namespace DramaLing.Api.Services;
public record SM2Input(
int Quality, // 1-5 評分
float EasinessFactor, // 難度係數
int Repetitions, // 重複次數
int IntervalDays // 當前間隔天數
);
public record SM2Result(
float EasinessFactor, // 新的難度係數
int Repetitions, // 新的重複次數
int IntervalDays, // 新的間隔天數
DateTime NextReviewDate // 下次複習日期
);
public static class SM2Algorithm
{
// SM-2 算法常數
private const float MIN_EASINESS_FACTOR = 1.3f;
private const float MAX_EASINESS_FACTOR = 2.5f;
private const float INITIAL_EASINESS_FACTOR = 2.5f;
private const int MIN_INTERVAL = 1;
private const int MAX_INTERVAL = 365;
/// <summary>
/// 計算下次複習的間隔和參數
/// </summary>
public static SM2Result Calculate(SM2Input input)
{
var (quality, easinessFactor, repetitions, intervalDays) = input;
// 驗證輸入參數
if (quality < 1 || quality > 5)
throw new ArgumentException("Quality must be between 1 and 5", nameof(input));
// 更新難度係數
var newEasinessFactor = UpdateEasinessFactor(easinessFactor, quality);
int newRepetitions;
int newIntervalDays;
// 如果回答錯誤 (quality < 3)，重置進度
if (quality < 3)
{
newRepetitions = 0;
newIntervalDays = 1;
}
else
{
// 如果回答正確，增加重複次數並計算新間隔
newRepetitions = repetitions + 1;
newIntervalDays = newRepetitions switch
{
1 => 1,
2 => 6,
_ => (int)Math.Round(intervalDays * newEasinessFactor)
};
}
// 限制間隔範圍
newIntervalDays = Math.Clamp(newIntervalDays, MIN_INTERVAL, MAX_INTERVAL);
// 計算下次複習日期
var nextReviewDate = DateTime.Today.AddDays(newIntervalDays);
return new SM2Result(
newEasinessFactor,
newRepetitions,
newIntervalDays,
nextReviewDate
);
}
/// <summary>
/// 更新難度係數
/// </summary>
private static float UpdateEasinessFactor(float currentEF, int quality)
{
// SM-2 公式：EF' = EF + (0.1 - (5-q) * (0.08 + (5-q) * 0.02))
var newEF = currentEF + (0.1f - (5 - quality) * (0.08f + (5 - quality) * 0.02f));
// 限制在有效範圍內
return Math.Clamp(newEF, MIN_EASINESS_FACTOR, MAX_EASINESS_FACTOR);
}
/// <summary>
/// 獲取初始參數（新詞卡）
/// </summary>
public static SM2Input GetInitialParameters()
{
return new SM2Input(
Quality: 3,
EasinessFactor: INITIAL_EASINESS_FACTOR,
Repetitions: 0,
IntervalDays: 1
);
}
/// <summary>
/// 根據評分獲取描述
/// </summary>
public static string GetQualityDescription(int quality)
{
return quality switch
{
1 => "完全不記得",
2 => "有印象但錯誤",
3 => "困難但正確",
4 => "猶豫後正確",
5 => "輕鬆正確",
_ => "無效評分"
};
}
/// <summary>
/// 計算掌握度百分比
/// </summary>
public static int CalculateMastery(int repetitions, float easinessFactor)
{
// 基於重複次數和難度係數計算掌握度 (0-100)
var baseScore = Math.Min(repetitions * 20, 80); // 重複次數最多貢獻80分
var efficiencyBonus = Math.Min((easinessFactor - 1.3f) * 16.67f, 20f); // 難度係數最多貢獻20分
return Math.Min((int)Math.Round(baseScore + efficiencyBonus), 100);
}
}
/// <summary>
/// 複習優先級計算器
/// </summary>
public static class ReviewPriorityCalculator
{
/// <summary>
/// 計算複習優先級 (數字越大優先級越高)
/// </summary>
public static double CalculatePriority(DateTime nextReviewDate, float easinessFactor, int repetitions)
{
var now = DateTime.Today;
var daysDiff = (now - nextReviewDate).Days;
// 過期天數的權重 (越過期優先級越高)
var overdueWeight = Math.Max(0, daysDiff) * 10;
// 難度權重 (越難的優先級越高)
var difficultyWeight = (3.8f - easinessFactor) * 5;
// 新詞權重 (新詞優先級較高)
var newWordWeight = repetitions == 0 ? 20 : 0;
return overdueWeight + difficultyWeight + newWordWeight;
}
/// <summary>
/// 獲取應該複習的詞卡
/// </summary>
public static bool ShouldReview(DateTime nextReviewDate)
{
return DateTime.Today >= nextReviewDate;
}
}

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using DramaLing.Api.Data;
using DramaLing.Api.Models.Configuration;
using DramaLing.Api.Models.DTOs.SpacedRepetition;
using DramaLing.Api.Models.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
namespace DramaLing.Api.Services;
/// <summary>
/// 智能複習間隔重複服務介面
/// </summary>
public interface ISpacedRepetitionService
{
Task<ReviewResult> ProcessReviewAsync(Guid flashcardId, ReviewRequest request);
int CalculateCurrentMasteryLevel(Flashcard flashcard);
Task<List<Flashcard>> GetDueFlashcardsAsync(Guid userId, DateTime? date = null, int limit = 50);
Task<Flashcard?> GetNextReviewCardAsync(Guid userId);
}
/// <summary>
/// 智能複習間隔重複服務實現 (基於現有SM2Algorithm擴展)
/// </summary>
public class SpacedRepetitionService : ISpacedRepetitionService
{
private readonly DramaLingDbContext _context;
private readonly ILogger<SpacedRepetitionService> _logger;
private readonly SpacedRepetitionOptions _options;
public SpacedRepetitionService(
DramaLingDbContext context,
ILogger<SpacedRepetitionService> logger,
IOptions<SpacedRepetitionOptions> options)
{
_context = context;
_logger = logger;
_options = options.Value;
}
/// <summary>
/// 處理復習結果並更新間隔重複算法
/// </summary>
public async Task<ReviewResult> ProcessReviewAsync(Guid flashcardId, ReviewRequest request)
{
var flashcard = await _context.Flashcards.FindAsync(flashcardId);
if (flashcard == null)
throw new ArgumentException($"Flashcard {flashcardId} not found");
var actualReviewDate = DateTime.Now.Date;
var overdueDays = Math.Max(0, (actualReviewDate - flashcard.NextReviewDate.Date).Days);
_logger.LogInformation("Processing review for flashcard {FlashcardId}, word: {Word}, overdue: {OverdueDays} days",
flashcardId, flashcard.Word, overdueDays);
// 1. 基於現有SM2Algorithm計算基礎間隔
var quality = GetQualityFromRequest(request);
var sm2Input = new SM2Input(quality, flashcard.EasinessFactor, flashcard.Repetitions, flashcard.IntervalDays);
var sm2Result = SM2Algorithm.Calculate(sm2Input);
// 2. 應用智能複習系統的增強邏輯
var enhancedInterval = ApplyEnhancedSpacedRepetitionLogic(sm2Result.IntervalDays, request, overdueDays);
// 3. 計算表現係數和增長係數
var performanceFactor = GetPerformanceFactor(request);
var growthFactor = _options.GrowthFactors.GetGrowthFactor(flashcard.IntervalDays);
var penaltyFactor = _options.OverduePenalties.GetPenaltyFactor(overdueDays);
// 4. 更新熟悉度
var newMasteryLevel = CalculateMasteryLevel(
flashcard.TimesCorrect + (request.IsCorrect ? 1 : 0),
flashcard.TimesReviewed + 1,
enhancedInterval
);
// 5. 更新資料庫
flashcard.EasinessFactor = sm2Result.EasinessFactor;
flashcard.Repetitions = sm2Result.Repetitions;
flashcard.IntervalDays = enhancedInterval;
flashcard.NextReviewDate = actualReviewDate.AddDays(enhancedInterval);
flashcard.MasteryLevel = newMasteryLevel;
flashcard.TimesReviewed++;
if (request.IsCorrect) flashcard.TimesCorrect++;
flashcard.LastReviewedAt = DateTime.Now;
flashcard.LastQuestionType = request.QuestionType;
flashcard.UpdatedAt = DateTime.UtcNow;
await _context.SaveChangesAsync();
return new ReviewResult
{
NewInterval = enhancedInterval,
NextReviewDate = flashcard.NextReviewDate,
MasteryLevel = newMasteryLevel,
CurrentMasteryLevel = CalculateCurrentMasteryLevel(flashcard),
IsOverdue = overdueDays > 0,
OverdueDays = overdueDays,
PerformanceFactor = performanceFactor,
GrowthFactor = growthFactor,
PenaltyFactor = penaltyFactor
};
}
/// <summary>
/// 計算當前熟悉度 (考慮記憶衰減)
/// </summary>
public int CalculateCurrentMasteryLevel(Flashcard flashcard)
{
if (flashcard.LastReviewedAt == null)
return flashcard.MasteryLevel;
var daysSinceReview = (DateTime.Now.Date - flashcard.LastReviewedAt.Value.Date).Days;
if (daysSinceReview <= 0)
return flashcard.MasteryLevel;
// 應用記憶衰減
var decayRate = _options.MemoryDecayRate;
var maxDecayDays = 30;
var effectiveDays = Math.Min(daysSinceReview, maxDecayDays);
var decayFactor = Math.Pow(1 - decayRate, effectiveDays);
return Math.Max(0, (int)(flashcard.MasteryLevel * decayFactor));
}
/// <summary>
/// 取得到期詞卡列表
/// </summary>
public async Task<List<Flashcard>> GetDueFlashcardsAsync(Guid userId, DateTime? date = null, int limit = 50)
{
var queryDate = date ?? DateTime.Now.Date;
var dueCards = await _context.Flashcards
.Where(f => f.UserId == userId &&
!f.IsArchived &&
f.NextReviewDate.Date <= queryDate)
.OrderBy(f => f.NextReviewDate) // 最逾期的優先
.ThenByDescending(f => f.MasteryLevel) // 熟悉度低的優先
.Take(limit)
.ToListAsync();
// UserLevel和WordLevel欄位已移除 - 改用即時CEFR轉換
// 不需要初始化數值欄位
return dueCards;
}
/// <summary>
/// 取得下一張需要復習的詞卡 (最高優先級)
/// </summary>
public async Task<Flashcard?> GetNextReviewCardAsync(Guid userId)
{
var dueCards = await GetDueFlashcardsAsync(userId, limit: 1);
return dueCards.FirstOrDefault();
}
/// <summary>
/// 應用增強的間隔重複邏輯 (基於演算法規格書)
/// </summary>
private int ApplyEnhancedSpacedRepetitionLogic(int baseInterval, ReviewRequest request, int overdueDays)
{
var performanceFactor = GetPerformanceFactor(request);
var growthFactor = _options.GrowthFactors.GetGrowthFactor(baseInterval);
var penaltyFactor = _options.OverduePenalties.GetPenaltyFactor(overdueDays);
var enhancedInterval = (int)(baseInterval * growthFactor * performanceFactor * penaltyFactor);
return Math.Clamp(enhancedInterval, 1, _options.MaxInterval);
}
/// <summary>
/// 根據題型和表現計算表現係數
/// </summary>
private double GetPerformanceFactor(ReviewRequest request)
{
return request.QuestionType switch
{
"flip-memory" => GetFlipCardPerformanceFactor(request.ConfidenceLevel ?? 3),
"vocab-choice" or "sentence-fill" or "sentence-reorder" => request.IsCorrect ? 1.1 : 0.6,
"vocab-listening" or "sentence-listening" => request.IsCorrect ? 1.2 : 0.5, // 聽力題難度加權
"sentence-speaking" => 1.0, // 口說題重在參與
_ => 0.9
};
}
/// <summary>
/// 翻卡題信心等級映射
/// </summary>
private double GetFlipCardPerformanceFactor(int confidenceLevel)
{
return confidenceLevel switch
{
1 => 0.5, // 很不確定
2 => 0.7, // 不確定
3 => 0.9, // 一般
4 => 1.1, // 確定
5 => 1.4, // 很確定
_ => 0.9
};
}
/// <summary>
/// 從請求轉換為SM2Algorithm需要的品質分數
/// </summary>
private int GetQualityFromRequest(ReviewRequest request)
{
if (request.QuestionType == "flip-memory")
{
return request.ConfidenceLevel ?? 3;
}
return request.IsCorrect ? 4 : 2; // 客觀題簡化映射
}
/// <summary>
/// 計算基礎熟悉度 (基於現有算法調整)
/// </summary>
private int CalculateMasteryLevel(int timesCorrect, int totalReviews, int currentInterval)
{
var successRate = totalReviews > 0 ? (double)timesCorrect / totalReviews : 0;
var baseScore = Math.Min(timesCorrect * 8, 60); // 答對次數貢獻 (最多60%)
var intervalBonus = Math.Min(currentInterval / 365.0 * 25, 25); // 間隔貢獻 (最多25%)
var accuracyBonus = successRate * 15; // 正確率貢獻 (最多15%)
return Math.Min(100, (int)Math.Round(baseScore + intervalBonus + accuracyBonus));
}
}

498
backend/DramaLing.Api/Services/StudySessionService.cs
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@ -1,498 +0,0 @@
using DramaLing.Api.Data;
using DramaLing.Api.Models.Entities;
using DramaLing.Api.Services;
using Microsoft.EntityFrameworkCore;
namespace DramaLing.Api.Services;
/// <summary>
/// 學習會話服務介面
/// </summary>
public interface IStudySessionService
{
Task<StudySession> StartSessionAsync(Guid userId);
Task<CurrentTestDto> GetCurrentTestAsync(Guid sessionId);
Task<SubmitTestResponseDto> SubmitTestAsync(Guid sessionId, SubmitTestRequestDto request);
Task<NextTestDto> GetNextTestAsync(Guid sessionId);
Task<ProgressDto> GetProgressAsync(Guid sessionId);
Task<StudySession> CompleteSessionAsync(Guid sessionId);
}
/// <summary>
/// 學習會話服務實現
/// </summary>
public class StudySessionService : IStudySessionService
{
private readonly DramaLingDbContext _context;
private readonly ILogger<StudySessionService> _logger;
private readonly IReviewModeSelector _reviewModeSelector;
public StudySessionService(
DramaLingDbContext context,
ILogger<StudySessionService> logger,
IReviewModeSelector reviewModeSelector)
{
_context = context;
_logger = logger;
_reviewModeSelector = reviewModeSelector;
}
/// <summary>
/// 開始新的學習會話
/// </summary>
public async Task<StudySession> StartSessionAsync(Guid userId)
{
_logger.LogInformation("Starting new study session for user {UserId}", userId);
// 獲取到期詞卡
var dueCards = await GetDueCardsAsync(userId);
if (!dueCards.Any())
{
throw new InvalidOperationException("No due cards available for study");
}
// 獲取用戶CEFR等級
var user = await _context.Users.FindAsync(userId);
var userCEFRLevel = user?.EnglishLevel ?? "A2";
// 創建學習會話
var session = new StudySession
{
Id = Guid.NewGuid(),
UserId = userId,
SessionType = "mixed", // 混合模式
StartedAt = DateTime.UtcNow,
Status = SessionStatus.Active,
TotalCards = dueCards.Count,
CurrentCardIndex = 0
};
_context.StudySessions.Add(session);
// 為每張詞卡創建學習進度記錄
int totalTests = 0;
for (int i = 0; i < dueCards.Count; i++)
{
var card = dueCards[i];
var wordCEFRLevel = card.DifficultyLevel ?? "A2";
var plannedTests = _reviewModeSelector.GetPlannedTests(userCEFRLevel, wordCEFRLevel);
var studyCard = new StudyCard
{
Id = Guid.NewGuid(),
StudySessionId = session.Id,
FlashcardId = card.Id,
Word = card.Word,
PlannedTests = plannedTests,
Order = i,
StartedAt = DateTime.UtcNow
};
_context.StudyCards.Add(studyCard);
totalTests += plannedTests.Count;
}
session.TotalTests = totalTests;
// 設置第一個測驗
if (session.StudyCards.Any())
{
var firstCard = session.StudyCards.OrderBy(c => c.Order).First();
session.CurrentTestType = firstCard.PlannedTests.First();
}
await _context.SaveChangesAsync();
_logger.LogInformation("Study session created: {SessionId}, Cards: {CardCount}, Tests: {TestCount}",
session.Id, session.TotalCards, session.TotalTests);
return session;
}
/// <summary>
/// 獲取當前測驗
/// </summary>
public async Task<CurrentTestDto> GetCurrentTestAsync(Guid sessionId)
{
var session = await GetSessionWithDetailsAsync(sessionId);
if (session == null || session.Status != SessionStatus.Active)
{
throw new InvalidOperationException("Session not found or not active");
}
var currentCard = session.StudyCards.OrderBy(c => c.Order).Skip(session.CurrentCardIndex).FirstOrDefault();
if (currentCard == null)
{
throw new InvalidOperationException("No current card found");
}
var flashcard = await _context.Flashcards
.FirstOrDefaultAsync(f => f.Id == currentCard.FlashcardId);
return new CurrentTestDto
{
SessionId = sessionId,
TestType = session.CurrentTestType ?? "flip-memory",
Card = new CardDto
{
Id = flashcard!.Id,
Word = flashcard.Word,
Translation = flashcard.Translation,
Definition = flashcard.Definition,
Example = flashcard.Example,
ExampleTranslation = flashcard.ExampleTranslation,
Pronunciation = flashcard.Pronunciation,
DifficultyLevel = flashcard.DifficultyLevel
},
Progress = new ProgressSummaryDto
{
CurrentCardIndex = session.CurrentCardIndex,
TotalCards = session.TotalCards,
CompletedTests = session.CompletedTests,
TotalTests = session.TotalTests,
CompletedCards = session.CompletedCards
}
};
}
/// <summary>
/// 提交測驗結果
/// </summary>
public async Task<SubmitTestResponseDto> SubmitTestAsync(Guid sessionId, SubmitTestRequestDto request)
{
var session = await GetSessionWithDetailsAsync(sessionId);
if (session == null || session.Status != SessionStatus.Active)
{
throw new InvalidOperationException("Session not found or not active");
}
var currentCard = session.StudyCards.OrderBy(c => c.Order).Skip(session.CurrentCardIndex).FirstOrDefault();
if (currentCard == null)
{
throw new InvalidOperationException("No current card found");
}
// 記錄測驗結果
var testResult = new TestResult
{
Id = Guid.NewGuid(),
StudyCardId = currentCard.Id,
TestType = request.TestType,
IsCorrect = request.IsCorrect,
UserAnswer = request.UserAnswer,
ConfidenceLevel = request.ConfidenceLevel,
ResponseTimeMs = request.ResponseTimeMs,
CompletedAt = DateTime.UtcNow
};
_context.TestResults.Add(testResult);
// 更新會話進度
session.CompletedTests++;
// 檢查當前詞卡是否完成所有測驗
var completedTestsForCard = await _context.TestResults
.Where(tr => tr.StudyCardId == currentCard.Id)
.CountAsync() + 1; // +1 因為當前測驗還未保存
if (completedTestsForCard >= currentCard.PlannedTestsCount)
{
// 詞卡完成，觸發SM2算法更新
currentCard.IsCompleted = true;
currentCard.CompletedAt = DateTime.UtcNow;
session.CompletedCards++;
await UpdateFlashcardWithSM2Async(currentCard, testResult);
}
await _context.SaveChangesAsync();
return new SubmitTestResponseDto
{
Success = true,
IsCardCompleted = currentCard.IsCompleted,
Progress = new ProgressSummaryDto
{
CurrentCardIndex = session.CurrentCardIndex,
TotalCards = session.TotalCards,
CompletedTests = session.CompletedTests,
TotalTests = session.TotalTests,
CompletedCards = session.CompletedCards
}
};
}
/// <summary>
/// 獲取下一個測驗
/// </summary>
public async Task<NextTestDto> GetNextTestAsync(Guid sessionId)
{
var session = await GetSessionWithDetailsAsync(sessionId);
if (session == null || session.Status != SessionStatus.Active)
{
throw new InvalidOperationException("Session not found or not active");
}
var currentCard = session.StudyCards.OrderBy(c => c.Order).Skip(session.CurrentCardIndex).FirstOrDefault();
if (currentCard == null)
{
return new NextTestDto { HasNextTest = false, Message = "All cards completed" };
}
// 檢查當前詞卡是否還有未完成的測驗
var completedTestTypes = await _context.TestResults
.Where(tr => tr.StudyCardId == currentCard.Id)
.Select(tr => tr.TestType)
.ToListAsync();
var nextTestType = currentCard.PlannedTests.FirstOrDefault(t => !completedTestTypes.Contains(t));
if (nextTestType != null)
{
// 當前詞卡還有測驗
session.CurrentTestType = nextTestType;
await _context.SaveChangesAsync();
return new NextTestDto
{
HasNextTest = true,
TestType = nextTestType,
SameCard = true,
Message = $"Next test: {nextTestType}"
};
}
else
{
// 當前詞卡完成，移到下一張詞卡
session.CurrentCardIndex++;
if (session.CurrentCardIndex < session.TotalCards)
{
var nextCard = session.StudyCards.OrderBy(c => c.Order).Skip(session.CurrentCardIndex).FirstOrDefault();
session.CurrentTestType = nextCard?.PlannedTests.FirstOrDefault();
await _context.SaveChangesAsync();
return new NextTestDto
{
HasNextTest = true,
TestType = session.CurrentTestType!,
SameCard = false,
Message = "Moving to next card"
};
}
else
{
// 所有詞卡完成
session.Status = SessionStatus.Completed;
session.EndedAt = DateTime.UtcNow;
await _context.SaveChangesAsync();
return new NextTestDto
{
HasNextTest = false,
Message = "Session completed"
};
}
}
}
/// <summary>
/// 獲取詳細進度
/// </summary>
public async Task<ProgressDto> GetProgressAsync(Guid sessionId)
{
var session = await GetSessionWithDetailsAsync(sessionId);
if (session == null)
{
throw new InvalidOperationException("Session not found");
}
var cardProgress = session.StudyCards.Select(card => new CardProgressDto
{
CardId = card.FlashcardId,
Word = card.Word,
PlannedTests = card.PlannedTests,
CompletedTestsCount = card.TestResults.Count,
IsCompleted = card.IsCompleted,
Tests = card.TestResults.Select(tr => new TestProgressDto
{
TestType = tr.TestType,
IsCorrect = tr.IsCorrect,
CompletedAt = tr.CompletedAt
}).ToList()
}).ToList();
return new ProgressDto
{
SessionId = sessionId,
Status = session.Status.ToString(),
CurrentCardIndex = session.CurrentCardIndex,
TotalCards = session.TotalCards,
CompletedTests = session.CompletedTests,
TotalTests = session.TotalTests,
CompletedCards = session.CompletedCards,
Cards = cardProgress
};
}
/// <summary>
/// 完成學習會話
/// </summary>
public async Task<StudySession> CompleteSessionAsync(Guid sessionId)
{
var session = await GetSessionWithDetailsAsync(sessionId);
if (session == null)
{
throw new InvalidOperationException("Session not found");
}
session.Status = SessionStatus.Completed;
session.EndedAt = DateTime.UtcNow;
await _context.SaveChangesAsync();
_logger.LogInformation("Study session completed: {SessionId}", sessionId);
return session;
}
// Helper Methods
private async Task<StudySession?> GetSessionWithDetailsAsync(Guid sessionId)
{
return await _context.StudySessions
.Include(s => s.StudyCards)
.ThenInclude(sc => sc.TestResults)
.Include(s => s.StudyCards)
.ThenInclude(sc => sc.Flashcard)
.FirstOrDefaultAsync(s => s.Id == sessionId);
}
private async Task<List<Flashcard>> GetDueCardsAsync(Guid userId, int limit = 50)
{
var today = DateTime.Today;
return await _context.Flashcards
.Where(f => f.UserId == userId &&
(f.NextReviewDate <= today || f.Repetitions == 0))
.OrderBy(f => f.NextReviewDate)
.Take(limit)
.ToListAsync();
}
private async Task UpdateFlashcardWithSM2Async(StudyCard studyCard, TestResult latestResult)
{
var flashcard = await _context.Flashcards.FindAsync(studyCard.FlashcardId);
if (flashcard == null) return;
// 計算詞卡的綜合表現
var allResults = await _context.TestResults
.Where(tr => tr.StudyCardId == studyCard.Id)
.ToListAsync();
var correctCount = allResults.Count(r => r.IsCorrect);
var totalTests = allResults.Count;
var accuracy = totalTests > 0 ? (double)correctCount / totalTests : 0;
// 使用現有的SM2Algorithm
var quality = accuracy >= 0.8 ? 5 : accuracy >= 0.6 ? 4 : accuracy >= 0.4 ? 3 : 2;
var sm2Input = new SM2Input(quality, flashcard.EasinessFactor, flashcard.Repetitions, flashcard.IntervalDays);
var sm2Result = SM2Algorithm.Calculate(sm2Input);
// 更新詞卡
flashcard.EasinessFactor = sm2Result.EasinessFactor;
flashcard.Repetitions = sm2Result.Repetitions;
flashcard.IntervalDays = sm2Result.IntervalDays;
flashcard.NextReviewDate = sm2Result.NextReviewDate;
flashcard.MasteryLevel = SM2Algorithm.CalculateMastery(sm2Result.Repetitions, sm2Result.EasinessFactor);
flashcard.TimesReviewed++;
if (accuracy >= 0.7) flashcard.TimesCorrect++;
flashcard.LastReviewedAt = DateTime.UtcNow;
_logger.LogInformation("Updated flashcard {Word} with SM2: Mastery={Mastery}, NextReview={NextReview}",
flashcard.Word, flashcard.MasteryLevel, sm2Result.NextReviewDate);
}
}
// DTOs
public class CurrentTestDto
{
public Guid SessionId { get; set; }
public string TestType { get; set; } = string.Empty;
public CardDto Card { get; set; } = new();
public ProgressSummaryDto Progress { get; set; } = new();
}
public class SubmitTestRequestDto
{
public string TestType { get; set; } = string.Empty;
public bool IsCorrect { get; set; }
public string? UserAnswer { get; set; }
public int? ConfidenceLevel { get; set; }
public int ResponseTimeMs { get; set; }
}
public class SubmitTestResponseDto
{
public bool Success { get; set; }
public bool IsCardCompleted { get; set; }
public ProgressSummaryDto Progress { get; set; } = new();
public string Message { get; set; } = string.Empty;
}
public class NextTestDto
{
public bool HasNextTest { get; set; }
public string? TestType { get; set; }
public bool SameCard { get; set; }
public string Message { get; set; } = string.Empty;
}
public class ProgressDto
{
public Guid SessionId { get; set; }
public string Status { get; set; } = string.Empty;
public int CurrentCardIndex { get; set; }
public int TotalCards { get; set; }
public int CompletedTests { get; set; }
public int TotalTests { get; set; }
public int CompletedCards { get; set; }
public List<CardProgressDto> Cards { get; set; } = new();
}
public class CardProgressDto
{
public Guid CardId { get; set; }
public string Word { get; set; } = string.Empty;
public List<string> PlannedTests { get; set; } = new();
public int CompletedTestsCount { get; set; }
public bool IsCompleted { get; set; }
public List<TestProgressDto> Tests { get; set; } = new();
}
public class TestProgressDto
{
public string TestType { get; set; } = string.Empty;
public bool IsCorrect { get; set; }
public DateTime CompletedAt { get; set; }
}
public class ProgressSummaryDto
{
public int CurrentCardIndex { get; set; }
public int TotalCards { get; set; }
public int CompletedTests { get; set; }
public int TotalTests { get; set; }
public int CompletedCards { get; set; }
}
public class CardDto
{
public Guid Id { get; set; }
public string Word { get; set; } = string.Empty;
public string Translation { get; set; } = string.Empty;
public string Definition { get; set; } = string.Empty;
public string Example { get; set; } = string.Empty;
public string ExampleTranslation { get; set; } = string.Empty;
public string Pronunciation { get; set; } = string.Empty;
public string DifficultyLevel { get; set; } = string.Empty;
}

127
backend/DramaLing.Api/Services/WordVariationService.cs
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@ -1,127 +0,0 @@
namespace DramaLing.Api.Services;
public interface IWordVariationService
{
string[] GetCommonVariations(string word);
bool IsVariationOf(string baseWord, string variation);
}
public class WordVariationService : IWordVariationService
{
private readonly ILogger<WordVariationService> _logger;
public WordVariationService(ILogger<WordVariationService> logger)
{
_logger = logger;
}
private readonly Dictionary<string, string[]> CommonVariations = new()
{
["eat"] = ["eats", "ate", "eaten", "eating"],
["go"] = ["goes", "went", "gone", "going"],
["have"] = ["has", "had", "having"],
["be"] = ["am", "is", "are", "was", "were", "been", "being"],
["do"] = ["does", "did", "done", "doing"],
["take"] = ["takes", "took", "taken", "taking"],
["make"] = ["makes", "made", "making"],
["come"] = ["comes", "came", "coming"],
["see"] = ["sees", "saw", "seen", "seeing"],
["get"] = ["gets", "got", "gotten", "getting"],
["give"] = ["gives", "gave", "given", "giving"],
["know"] = ["knows", "knew", "known", "knowing"],
["think"] = ["thinks", "thought", "thinking"],
["say"] = ["says", "said", "saying"],
["tell"] = ["tells", "told", "telling"],
["find"] = ["finds", "found", "finding"],
["work"] = ["works", "worked", "working"],
["feel"] = ["feels", "felt", "feeling"],
["try"] = ["tries", "tried", "trying"],
["ask"] = ["asks", "asked", "asking"],
["need"] = ["needs", "needed", "needing"],
["seem"] = ["seems", "seemed", "seeming"],
["turn"] = ["turns", "turned", "turning"],
["start"] = ["starts", "started", "starting"],
["show"] = ["shows", "showed", "shown", "showing"],
["hear"] = ["hears", "heard", "hearing"],
["play"] = ["plays", "played", "playing"],
["run"] = ["runs", "ran", "running"],
["move"] = ["moves", "moved", "moving"],
["live"] = ["lives", "lived", "living"],
["believe"] = ["believes", "believed", "believing"],
["hold"] = ["holds", "held", "holding"],
["bring"] = ["brings", "brought", "bringing"],
["happen"] = ["happens", "happened", "happening"],
["write"] = ["writes", "wrote", "written", "writing"],
["sit"] = ["sits", "sat", "sitting"],
["stand"] = ["stands", "stood", "standing"],
["lose"] = ["loses", "lost", "losing"],
["pay"] = ["pays", "paid", "paying"],
["meet"] = ["meets", "met", "meeting"],
["include"] = ["includes", "included", "including"],
["continue"] = ["continues", "continued", "continuing"],
["set"] = ["sets", "setting"],
["learn"] = ["learns", "learned", "learnt", "learning"],
["change"] = ["changes", "changed", "changing"],
["lead"] = ["leads", "led", "leading"],
["understand"] = ["understands", "understood", "understanding"],
["watch"] = ["watches", "watched", "watching"],
["follow"] = ["follows", "followed", "following"],
["stop"] = ["stops", "stopped", "stopping"],
["create"] = ["creates", "created", "creating"],
["speak"] = ["speaks", "spoke", "spoken", "speaking"],
["read"] = ["reads", "reading"],
["spend"] = ["spends", "spent", "spending"],
["grow"] = ["grows", "grew", "grown", "growing"],
["open"] = ["opens", "opened", "opening"],
["walk"] = ["walks", "walked", "walking"],
["win"] = ["wins", "won", "winning"],
["offer"] = ["offers", "offered", "offering"],
["remember"] = ["remembers", "remembered", "remembering"],
["love"] = ["loves", "loved", "loving"],
["consider"] = ["considers", "considered", "considering"],
["appear"] = ["appears", "appeared", "appearing"],
["buy"] = ["buys", "bought", "buying"],
["wait"] = ["waits", "waited", "waiting"],
["serve"] = ["serves", "served", "serving"],
["die"] = ["dies", "died", "dying"],
["send"] = ["sends", "sent", "sending"],
["expect"] = ["expects", "expected", "expecting"],
["build"] = ["builds", "built", "building"],
["stay"] = ["stays", "stayed", "staying"],
["fall"] = ["falls", "fell", "fallen", "falling"],
["cut"] = ["cuts", "cutting"],
["reach"] = ["reaches", "reached", "reaching"],
["kill"] = ["kills", "killed", "killing"],
["remain"] = ["remains", "remained", "remaining"]
};
public string[] GetCommonVariations(string word)
{
if (string.IsNullOrEmpty(word))
return Array.Empty<string>();
var lowercaseWord = word.ToLower();
if (CommonVariations.TryGetValue(lowercaseWord, out var variations))
{
_logger.LogDebug("Found {Count} variations for word: {Word}", variations.Length, word);
return variations;
}
_logger.LogDebug("No variations found for word: {Word}", word);
return Array.Empty<string>();
}
public bool IsVariationOf(string baseWord, string variation)
{
if (string.IsNullOrEmpty(baseWord) || string.IsNullOrEmpty(variation))
return false;
var variations = GetCommonVariations(baseWord);
var result = variations.Contains(variation.ToLower());
_logger.LogDebug("Checking if {Variation} is variation of {BaseWord}: {Result}",
variation, baseWord, result);
return result;
}
}

18
backend/DramaLing.Api/appsettings.json
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@ -59,23 +59,5 @@
"MaxFileSize": 10485760, "MaxFileSize": 10485760,
"AllowedFormats": ["png", "jpg", "jpeg", "webp"] "AllowedFormats": ["png", "jpg", "jpeg", "webp"]
} }
},
"SpacedRepetition": {
"GrowthFactors": {
"ShortTerm": 1.8,
"MediumTerm": 1.4,
"LongTerm": 1.2,
"VeryLongTerm": 1.1
},
"OverduePenalties": {
"Light": 0.9,
"Medium": 0.75,
"Heavy": 0.5,
"Extreme": 0.3
},
"MemoryDecayRate": 0.05,
"MaxInterval": 365,
"A1ProtectionLevel": 20,
"DefaultUserLevel": 50
} }
} }

0
note/智能複習/智能複習系統-後端功能規格書.md → note/done/智能複習系統-後端功能規格書.md
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2
note/智能複習/智能複習系統-演算法規格書.md
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@ -229,7 +229,7 @@ def weighted_select(types, weights):
計算難度差異 (wordLevel - userLevel) 計算難度差異 (wordLevel - userLevel)
↓ ↓
判斷學習情境 判斷學習情境
├── A1學習者 (≤20) → 基礎3題型池 ├── A1學習者 (user的cefr=A1) → 基礎3題型池
├── 簡單詞彙 (<-10) → 應用2題型池 ├── 簡單詞彙 (<-10) → 應用2題型池
├── 適中詞彙 (-10~10) → 全方位3題型池 ├── 適中詞彙 (-10~10) → 全方位3題型池
└── 困難詞彙 (>10) → 基礎2題型池 └── 困難詞彙 (>10) → 基礎2題型池

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@ -0,0 +1,514 @@
# 後端複習系統清空執行計劃
**目標**: 完全移除當前後端複雜的複習系統程式碼，準備重新實施簡潔版本
**日期**: 2025-09-29
**執行範圍**: DramaLing.Api 後端專案
**風險等級**: 🟡 中等 (需要仔細執行以避免破壞核心功能)
---
## 🎯 **清空目標與範圍**
### **清空目標**
1. **移除複雜的智能複習邏輯**: 包含 Session 概念、複雜隊列管理
2. **保留核心詞卡功能**: 基本 CRUD 和簡單統計
3. **為重新實施做準備**: 清潔的代碼基礎
### **保留功能**
- ✅ 詞卡基本 CRUD (FlashcardsController)
- ✅ 用戶認證 (AuthController)
- ✅ AI 分析服務 (AIController)
- ✅ 音訊服務 (AudioController)
- ✅ 圖片生成 (ImageGenerationController)
- ✅ 基礎統計 (StatsController)
---
## 🗄️ **資料庫結構盤點**
### **複習系統相關資料表**
```sql
📊 當前資料庫表結構分析：
✅ 需要保留的核心表：
├── user_profiles 用戶基本資料
├── flashcards 詞卡核心資料 (需簡化)
├── study_records 學習記錄 (需簡化)
├── daily_stats 每日統計
├── audio_cache 音訊快取
├── example_images 例句圖片
├── flashcard_example_images 詞卡圖片關聯
├── image_generation_requests 圖片生成請求
├── options_vocabularies 選項詞彙庫
├── error_reports 錯誤報告
└── sentence_analysis_cache 句子分析快取
❌ 需要處理的複習相關表：
├── study_sessions 學習會話表 🗑️ 刪除
├── study_cards 會話詞卡表 🗑️ 刪除
├── test_results 測驗結果表 🗑️ 刪除
└── pronunciation_assessments 發音評估 ⚠️ 檢查關聯
```
### **資料庫遷移文件**
```
📁 Migrations/
├── 20250926053105_AddStudyCardAndTestResult.cs 🗑️ 需要回滾
├── 20250926053105_AddStudyCardAndTestResult.Designer.cs 🗑️ 需要回滾
├── 20250926061341_AddStudyRecordUniqueIndex.cs ⚠️ 可能保留
├── 20250926061341_AddStudyRecordUniqueIndex.Designer.cs ⚠️ 可能保留
└── 其他遷移文件 ✅ 保留
```
### **資料庫清理策略**
1. **StudyRecord 表處理**:
- ✅ **保留基本結構**: 作為簡化的學習記錄
- 🔧 **移除複雜欄位**: SM-2 相關的追蹤欄位
- ⚠️ **保留核心欄位**: user_id, flashcard_id, study_mode, is_correct, studied_at
2. **複雜表結構移除**:
- 🗑️ **study_sessions**: 完全移除 (Session 概念)
- 🗑️ **study_cards**: 完全移除 (Session 相關)
- 🗑️ **test_results**: 完全移除 (與 StudyRecord 重複)
3. **遷移文件處理**:
- 📝 **創建回滾遷移**: 移除 study_sessions, study_cards, test_results 表
- ✅ **保留核心遷移**: StudyRecord 基本結構保留
---
## 📋 **完整清空文件清單**
### 🗑️ **需要完全刪除的文件**
#### **服務層文件**
```
📁 Services/
├── SpacedRepetitionService.cs 🗑️ 完全刪除 (8,574 bytes)
├── ReviewTypeSelectorService.cs 🗑️ 完全刪除 (8,887 bytes)
├── ReviewModeSelector.cs 🗑️ 完全刪除 (2,598 bytes)
├── QuestionGeneratorService.cs 🗑️ 檢查後可能刪除
└── BlankGenerationService.cs 🗑️ 檢查後可能刪除
```
#### **DTO 相關文件**
```
📁 Models/DTOs/SpacedRepetition/
├── ReviewModeResult.cs 🗑️ 完全刪除
├── ReviewRequest.cs 🗑️ 完全刪除
├── ReviewResult.cs 🗑️ 完全刪除
└── 整個 SpacedRepetition 資料夾 🗑️ 完全刪除
```
#### **配置文件**
```
📁 Models/Configuration/
└── SpacedRepetitionOptions.cs 🗑️ 完全刪除
```
#### **實體文件**
```
📁 Models/Entities/
├── StudySession.cs 🗑️ 完全刪除 (如存在)
├── StudyCard.cs 🗑️ 完全刪除 (如存在)
└── TestResult.cs 🗑️ 完全刪除 (如存在)
```
### ⚠️ **需要大幅簡化的文件**
#### **控制器文件**
```
📁 Controllers/
└── StudyController.cs 🔧 大幅簡化
├── 移除所有智能複習 API (due, next-review, optimal-mode, question, review)
├── 保留基礎統計 (stats)
├── 保留測驗記錄 (record-test, completed-tests)
└── 移除複雜的 Session 邏輯
```
#### **核心配置文件**
```
📁 根目錄文件
├── Program.cs 🔧 移除複習服務註冊
├── DramaLingDbContext.cs 🔧 移除複習相關配置
└── appsettings.json 🔧 移除 SpacedRepetition 配置
```
#### **實體文件**
```
📁 Models/Entities/
├── Flashcard.cs 🔧 簡化複習相關屬性
├── User.cs ✅ 基本保持不變
└── StudyRecord.cs 🔧 簡化為基礎記錄
```
---
## 🔍 **詳細清空步驟**
### **第一階段：停止服務並備份**
1. **停止當前運行的服務**
```bash
# 停止所有後端服務
pkill -f "dotnet run"
```
2. **創建備份分支** (可選)
```bash
git checkout -b backup/before-review-cleanup
git add .
git commit -m "backup: 清空前的複習系統狀態備份"
```
### **第二階段：刪除服務層文件**
```bash
# 刪除智能複習服務
rm Services/SpacedRepetitionService.cs
rm Services/ReviewTypeSelectorService.cs
rm Services/ReviewModeSelector.cs
# 檢查並決定是否刪除
# rm Services/QuestionGeneratorService.cs # 可能被選項詞彙庫使用
# rm Services/BlankGenerationService.cs # 可能被其他功能使用
```
### **第三階段：刪除 DTO 和配置文件**
```bash
# 刪除整個 SpacedRepetition DTO 資料夾
rm -rf Models/DTOs/SpacedRepetition/
# 刪除配置文件
rm Models/Configuration/SpacedRepetitionOptions.cs
```
### **第四階段：簡化 StudyController**
需要手動編輯 `Controllers/StudyController.cs`：
```csharp
// 移除的內容：
- 智能複習服務依賴注入 (ISpacedRepetitionService, IReviewTypeSelectorService 等)
- 智能複習 API 方法 (GetDueCards, GetNextReview, GetOptimalReviewMode, GenerateQuestion, SubmitReview)
- 複雜的 Session 相關邏輯
// 保留的內容：
- 基礎統計 (GetStudyStats)
- 測驗記錄 (RecordTestCompletion, GetCompletedTests)
- 基礎認證和日誌功能
```
### **第五階段：清理 Program.cs 服務註冊**
```csharp
// 移除的服務註冊：
// builder.Services.AddScoped<ISpacedRepetitionService, SpacedRepetitionService>();
// builder.Services.AddScoped<IReviewTypeSelectorService, ReviewTypeSelectorService>();
// builder.Services.AddScoped<IQuestionGeneratorService, QuestionGeneratorService>();
// builder.Services.Configure<SpacedRepetitionOptions>(...);
```
### **第六階段：簡化資料模型**
1. **簡化 Flashcard.cs**
```csharp
// 移除的屬性：
- ReviewHistory
- LastQuestionType
- 複雜的 SM-2 算法屬性 (可選保留基礎的)
// 保留的屬性：
- 基本詞卡內容 (Word, Translation, Definition 等)
- 基礎學習狀態 (MasteryLevel, TimesReviewed)
- 基礎複習間隔 (NextReviewDate, IntervalDays)
```
2. **簡化 StudyRecord.cs**
```csharp
// 保留簡化版本：
- 基本測驗記錄 (FlashcardId, TestType, IsCorrect)
- 移除複雜的 SM-2 追蹤參數
```
### **第七階段：資料庫結構清理**
#### **7.1 清理 DramaLingDbContext.cs**
```csharp
// 移除的 DbSet：
- DbSet<StudySession> StudySessions 🗑️ 刪除
- DbSet<StudyCard> StudyCards 🗑️ 刪除
- DbSet<TestResult> TestResults 🗑️ 刪除
// 移除的 ToTable 配置：
- .ToTable("study_sessions") 🗑️ 刪除
- .ToTable("study_cards") 🗑️ 刪除
- .ToTable("test_results") 🗑️ 刪除
// 移除的關聯配置：
- StudySession 與 User 的關聯
- StudyCard 與 StudySession 的關聯
- TestResult 與 StudyCard 的關聯
- PronunciationAssessment 與 StudySession 的關聯
// 簡化 StudyRecord 配置：
- 移除複雜的 SM-2 追蹤欄位配置
- 保留基本的 user_id, flashcard_id, study_mode 索引
```
#### **7.2 創建資料庫清理遷移**
```bash
# 創建新的遷移來移除複雜表結構
dotnet ef migrations add RemoveComplexStudyTables
# 在遷移中執行：
migrationBuilder.DropTable("study_sessions");
migrationBuilder.DropTable("study_cards");
migrationBuilder.DropTable("test_results");
# 移除 PronunciationAssessment 中的 StudySessionId 欄位
migrationBuilder.DropColumn("study_session_id", "pronunciation_assessments");
```
#### **7.3 清理配置文件**
```json
// appsettings.json - 移除的配置段落：
- "SpacedRepetition": { ... } 🗑️ 完全移除
```
#### **7.4 簡化 Flashcard 實體**
```csharp
// Flashcard.cs - 移除的複習相關屬性：
- ReviewHistory (JSON 複習歷史) 🗑️ 移除
- LastQuestionType 🗑️ 移除
- 複雜的 SM-2 追蹤欄位 (可選保留基礎的) ⚠️ 檢查
// 保留的基本屬性：
- EasinessFactor, Repetitions, IntervalDays ✅ 保留 (基礎複習間隔)
- NextReviewDate, MasteryLevel ✅ 保留 (基本狀態)
- TimesReviewed, TimesCorrect ✅ 保留 (統計)
```
---
## 🧹 **清空後的目標架構**
### **簡化後的 API 端點**
```
📍 保留的端點：
├── /api/flashcards/* 詞卡 CRUD (6個端點)
├── /api/auth/* 用戶認證 (4個端點)
├── /api/ai/* AI 分析 (3個端點)
├── /api/audio/* 音訊服務 (4個端點)
├── /api/ImageGeneration/* 圖片生成 (4個端點)
├── /api/stats/* 統計分析 (3個端點)
└── /api/study/* 簡化學習 (2個端點)
├── GET /stats 學習統計
└── POST /record-test 測驗記錄
❌ 移除的端點：
├── /api/study/due (複雜的到期詞卡邏輯)
├── /api/study/next-review (複雜的下一張邏輯)
├── /api/study/{id}/optimal-mode (智能模式選擇)
├── /api/study/{id}/question (題目生成)
├── /api/study/{id}/review (複習結果提交)
└── 所有 Session 相關端點
```
### **簡化後的服務層**
```
📦 保留的服務：
├── AuthService 認證服務
├── GeminiService AI 分析
├── AnalysisService 句子分析
├── AzureSpeechService 語音服務
├── AudioCacheService 音訊快取
├── ImageGenerationOrchestrator 圖片生成
├── ImageStorageService 圖片儲存
├── UsageTrackingService 使用追蹤
└── OptionsVocabularyService 選項詞彙庫
❌ 移除的服務：
├── SpacedRepetitionService 間隔重複算法
├── ReviewTypeSelectorService 複習題型選擇
├── ReviewModeSelector 複習模式選擇
├── StudySessionService 學習會話管理
└── 相關的介面檔案
```
### **簡化後的資料模型**
```
📊 核心實體 (簡化版)：
├── User 基本用戶資料
├── Flashcard 基本詞卡 (移除複雜複習屬性)
├── StudyRecord 簡化學習記錄
├── DailyStats 基礎統計
├── AudioCache 音訊快取
├── ExampleImage 例句圖片
├── OptionsVocabulary 選項詞彙庫
└── ErrorReport 錯誤報告
❌ 移除的實體：
├── StudySession 學習會話
├── StudyCard 會話詞卡
├── TestResult 測驗結果
└── 複雜的複習相關實體
```
---
## ⚡ **預期清空效果**
### **代碼量減少**
- **服務層**: 減少 ~20,000 行複雜邏輯
- **DTO 層**: 減少 ~1,000 行傳輸物件
- **控制器**: StudyController 從 583行 → ~100行
- **總計**: 預計減少 ~25,000 行複雜代碼
### **API 端點簡化**
- **移除端點**: 5-8 個複雜的智能複習端點
- **保留端點**: ~25 個核心功能端點
- **複雜度**: 從複雜多層依賴 → 簡單直接邏輯
### **系統複雜度**
- **服務依賴**: 從 8個複習服務 → 0個
- **資料實體**: 從 18個 → ~12個 核心實體
- **配置項目**: 從複雜參數配置 → 基本配置
---
## 🛡️ **風險控制措施**
### **清空前檢查**
1. **確認無前端依賴**: 檢查前端是否調用即將刪除的 API
2. **資料備份**: 確保重要資料已備份
3. **服務停止**: 確保所有相關服務已停止
### **分階段執行**
1. **先註解服務註冊**: 在 Program.cs 中註解掉服務，確保編譯通過
2. **逐步刪除文件**: 按依賴關係順序刪除
3. **驗證編譯**: 每階段後驗證系統可編譯
4. **功能測試**: 確保保留功能正常運作
### **回滾準備**
1. **Git 分支備份**: 清空前創建備份分支
2. **關鍵文件備份**: 手動備份重要配置文件
3. **快速恢復腳本**: 準備快速恢復命令
---
## 📝 **執行步驟檢查清單**
### **準備階段**
- [ ] 停止所有後端服務
- [ ] 創建 Git 備份分支
- [ ] 確認前端無依賴調用
- [ ] 備份關鍵配置文件
### **刪除階段**
- [ ] 註解 Program.cs 服務註冊
- [ ] 刪除 SpacedRepetition DTO 資料夾
- [ ] 刪除複習相關服務文件
- [ ] 刪除配置文件
- [ ] 簡化 StudyController
### **清理階段**
- [ ] 清理 DramaLingDbContext 配置
- [ ] 簡化 Flashcard 實體
- [ ] 移除 appsettings 複習配置
- [ ] 清理 using 語句
### **資料庫清理階段**
- [ ] 創建清理遷移檔案
- [ ] 執行資料庫清理遷移
- [ ] 驗證資料表結構正確
- [ ] 檢查資料完整性
- [ ] 清理過時的遷移文件
### **驗證階段**
- [ ] 編譯測試通過
- [ ] 基礎 API 功能正常
- [ ] 詞卡 CRUD 正常
- [ ] 認證功能正常
- [ ] 統計功能正常
- [ ] 資料庫查詢正常
### **完成階段**
- [ ] 提交清空變更
- [ ] 更新架構文檔
- [ ] 通知團隊清空完成
- [ ] 準備重新實施
---
## 🚀 **清空後的架構優勢**
### **簡潔性**
- **代碼可讀性**: 移除複雜邏輯後代碼更易理解
- **維護性**: 減少相互依賴，更易維護
- **除錯性**: 簡化的邏輯更容易除錯
### **可擴展性**
- **重新設計**: 為新的簡潔設計提供清潔基礎
- **模組化**: 功能模組更加獨立
- **測試友善**: 簡化的邏輯更容易測試
### **效能提升**
- **響應速度**: 移除複雜計算邏輯
- **記憶體使用**: 減少複雜物件實例
- **啟動速度**: 減少服務註冊和初始化
---
## ⚠️ **風險評估與緩解**
### **高風險項目**
1. **資料完整性**:
- **風險**: 刪除實體可能影響資料庫
- **緩解**: 先移除代碼引用，保留資料庫結構
2. **API 相容性**:
- **風險**: 前端可能調用被刪除的 API
- **緩解**: 清空前確認前端依賴關係
### **中風險項目**
1. **編譯錯誤**:
- **風險**: 刪除文件後可能有編譯錯誤
- **緩解**: 分階段執行，每步驗證編譯
2. **功能缺失**:
- **風險**: 意外刪除必要功能
- **緩解**: 仔細檢查文件依賴關係
---
## 📊 **清空進度追蹤**
### **進度指標**
- **文件刪除進度**: X / Y 個文件已刪除
- **代碼行數減少**: 當前 / 目標 行數
- **編譯狀態**: ✅ 通過 / ❌ 失敗
- **功能測試**: X / Y 個核心功能正常
### **完成標準**
- ✅ 所有複習相關文件已刪除
- ✅ 系統可正常編譯運行
- ✅ 核心功能 (詞卡 CRUD, 認證) 正常
- ✅ API 端點從 ~30個 減少到 ~20個
- ✅ 代碼複雜度大幅降低
---
## 🎉 **清空完成後的下一步**
### **立即後續工作**
1. **更新技術文檔**: 反映清空後的架構
2. **重新規劃**: 基於簡潔架構重新設計複習系統
3. **前端調整**: 調整前端 API 調用 (如有必要)
### **重新實施準備**
1. **需求重審**: 基於產品需求規格書重新設計
2. **技術選型**: 選擇更簡潔的實施方案
3. **組件化設計**: 按技術實作架構規格書實施
---
**執行負責人**: 開發團隊
**預計執行時間**: 2-4 小時
**風險等級**: 🟡 中等
**回滾準備**: ✅ 已準備
**執行狀態**: 📋 **待執行**