1

server/service/learning/chapter.go

@@ -0,0 +1,126 @@
+package learning
+
+import (
+	"context"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type ChapterService struct{}
+
+// CreateChapter 创建章节
+func (chapterService *ChapterService) CreateChapter(ctx context.Context, chapter *learning.Chapter) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Create(chapter).Error
+	return err
+}
+
+// DeleteChapter 删除章节
+func (chapterService *ChapterService) DeleteChapter(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.Chapter{}, ID).Error
+	return err
+}
+
+// DeleteChapterByIds 批量删除章节
+func (chapterService *ChapterService) DeleteChapterByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.Chapter{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateChapter 更新章节
+func (chapterService *ChapterService) UpdateChapter(ctx context.Context, chapter learning.Chapter) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Chapter{}).Where("id = ?", chapter.ID).Updates(&chapter).Error
+	return err
+}
+
+// GetChapter 根据ID获取章节
+func (chapterService *ChapterService) GetChapter(ctx context.Context, ID string) (chapter learning.Chapter, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&chapter).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的课程信息
+	if chapter.CourseId != 0 {
+		var course learning.Course
+		courseErr := global.GVA_DB.WithContext(ctx).Where("id = ?", chapter.CourseId).First(&course).Error
+		if courseErr == nil {
+			chapter.Course = course
+		}
+	}
+	return
+}
+
+// GetChapterInfoList 分页获取章节列表
+func (chapterService *ChapterService) GetChapterInfoList(ctx context.Context, info learningReq.ChapterSearch) (list []learning.Chapter, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.Chapter{})
+	var chapters []learning.Chapter
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.Title != "" {
+		db = db.Where("title LIKE ?", "%"+info.Title+"%")
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	if info.CourseId != 0 {
+		db = db.Where("course_id = ?", info.CourseId)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("sort asc, created_at desc").Find(&chapters).Error
+	if err != nil {
+		return chapters, total, err
+	}
+
+	// 手动查询关联的课程信息
+	courseIds := make([]uint, 0)
+	courseMap := make(map[uint]learning.Course)
+
+	for _, chapter := range chapters {
+		if chapter.CourseId != 0 {
+			courseIds = append(courseIds, chapter.CourseId)
+		}
+	}
+
+	if len(courseIds) > 0 {
+		var courses []learning.Course
+		global.GVA_DB.WithContext(ctx).Where("id in ?", courseIds).Find(&courses)
+		for _, course := range courses {
+			courseMap[course.ID] = course
+		}
+
+		// 为每个章节设置课程信息
+		for i := range chapters {
+			if course, exists := courseMap[chapters[i].CourseId]; exists {
+				chapters[i].Course = course
+			}
+		}
+	}
+
+	return chapters, total, err
+}
+
+// GetChaptersByCourse 根据课程ID获取章节列表
+func (chapterService *ChapterService) GetChaptersByCourse(ctx context.Context, courseId uint) (list []learning.Chapter, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("course_id = ? AND status = ?", courseId, "published").Order("sort asc, created_at asc").Find(&list).Error
+	return
+}
+
+// UpdateChapterStatus 更新章节状态
+func (chapterService *ChapterService) UpdateChapterStatus(ctx context.Context, ID string, status string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Chapter{}).Where("id = ?", ID).Update("status", status).Error
+	return err
+}

server/service/learning/course.go

@@ -0,0 +1,86 @@
+package learning
+
+import (
+	"context"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type CourseService struct{}
+
+// CreateCourse 创建课程
+func (courseService *CourseService) CreateCourse(ctx context.Context, course *learning.Course) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Create(course).Error
+	return err
+}
+
+// DeleteCourse 删除课程
+func (courseService *CourseService) DeleteCourse(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.Course{}, ID).Error
+	return err
+}
+
+// DeleteCourseByIds 批量删除课程
+func (courseService *CourseService) DeleteCourseByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.Course{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateCourse 更新课程
+func (courseService *CourseService) UpdateCourse(ctx context.Context, course learning.Course) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Course{}).Where("id = ?", course.ID).Updates(&course).Error
+	return err
+}
+
+// GetCourse 根据ID获取课程
+func (courseService *CourseService) GetCourse(ctx context.Context, ID string) (course learning.Course, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&course).Error
+	return
+}
+
+// GetCourseInfoList 分页获取课程列表
+func (courseService *CourseService) GetCourseInfoList(ctx context.Context, info learningReq.CourseSearch) (list []learning.Course, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.Course{})
+	var courses []learning.Course
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.Title != "" {
+		db = db.Where("title LIKE ?", "%"+info.Title+"%")
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	if info.Difficulty != "" {
+		db = db.Where("difficulty = ?", info.Difficulty)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("sort desc, created_at desc").Find(&courses).Error
+	return courses, total, err
+}
+
+// GetPublishedCourses 获取已发布的课程列表（供学员选择）
+func (courseService *CourseService) GetPublishedCourses(ctx context.Context) (list []learning.Course, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("status = ?", "published").Order("sort desc, created_at desc").Find(&list).Error
+	return
+}
+
+// UpdateCourseStatus 更新课程状态
+func (courseService *CourseService) UpdateCourseStatus(ctx context.Context, ID string, status string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Course{}).Where("id = ?", ID).Update("status", status).Error
+	return err
+}

server/service/learning/enter.go

@@ -0,0 +1,12 @@
+package learning
+
+type ServiceGroup struct {
+	CourseService
+	ChapterService
+	KnowledgePointService
+	QuestionService
+	UserLearningService
+	WrongQuestionService
+	ExamService
+	UserExamService
+}

server/service/learning/exam.go

@@ -0,0 +1,193 @@
+package learning
+
+import (
+	"context"
+	"time"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type ExamService struct{}
+
+// CreateExam 创建考试
+func (examService *ExamService) CreateExam(ctx context.Context, exam *learning.Exam) (err error) {
+	// 设置默认值
+	if exam.Status == "" {
+		exam.Status = "draft"
+	}
+	if exam.MaxAttempts == 0 {
+		exam.MaxAttempts = 1
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Create(exam).Error
+	return err
+}
+
+// DeleteExam 删除考试
+func (examService *ExamService) DeleteExam(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.Exam{}, ID).Error
+	return err
+}
+
+// DeleteExamByIds 批量删除考试
+func (examService *ExamService) DeleteExamByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.Exam{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateExam 更新考试
+func (examService *ExamService) UpdateExam(ctx context.Context, exam learning.Exam) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).Where("id = ?", exam.ID).Updates(&exam).Error
+	return err
+}
+
+// GetExam 根据ID获取考试
+func (examService *ExamService) GetExam(ctx context.Context, ID string) (exam learning.Exam, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&exam).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的课程信息
+	examService.loadCourseInfo(ctx, &exam)
+	return
+}
+
+// GetExamInfoList 分页获取考试列表
+func (examService *ExamService) GetExamInfoList(ctx context.Context, info learningReq.ExamSearch) (list []learning.Exam, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.Exam{})
+	var exams []learning.Exam
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.Title != "" {
+		db = db.Where("title LIKE ?", "%"+info.Title+"%")
+	}
+	if info.CourseId != 0 {
+		db = db.Where("course_id = ?", info.CourseId)
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("created_at desc").Find(&exams).Error
+	if err != nil {
+		return exams, total, err
+	}
+
+	// 批量加载关联的课程信息
+	for i := range exams {
+		examService.loadCourseInfo(ctx, &exams[i])
+	}
+
+	return exams, total, err
+}
+
+// GetActiveExams 获取进行中的考试列表
+func (examService *ExamService) GetActiveExams(ctx context.Context) (list []learning.Exam, err error) {
+	now := time.Now()
+	err = global.GVA_DB.WithContext(ctx).
+		Where("status = ? AND start_time <= ? AND end_time >= ?", "published", now, now).
+		Order("start_time asc").
+		Find(&list).Error
+
+	// 批量加载关联的课程信息
+	for i := range list {
+		examService.loadCourseInfo(ctx, &list[i])
+	}
+
+	return
+}
+
+// GetExamsByCourse 根据课程获取考试列表
+func (examService *ExamService) GetExamsByCourse(ctx context.Context, courseId uint) (list []learning.Exam, err error) {
+	err = global.GVA_DB.WithContext(ctx).
+		Where("course_id = ? AND status = ?", courseId, "published").
+		Order("start_time asc").
+		Find(&list).Error
+
+	// 批量加载关联的课程信息
+	for i := range list {
+		examService.loadCourseInfo(ctx, &list[i])
+	}
+
+	return
+}
+
+// PublishExam 发布考试
+func (examService *ExamService) PublishExam(ctx context.Context, examId uint) (err error) {
+	updates := map[string]interface{}{
+		"status": "published",
+	}
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).
+		Where("id = ?", examId).
+		Updates(updates).Error
+	return err
+}
+
+// GetExamStatistics 获取考试统计
+func (examService *ExamService) GetExamStatistics(ctx context.Context) (stats learningReq.ExamStatistics, err error) {
+	// 总考试数
+	var totalExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).Count(&totalExams).Error
+	if err != nil {
+		return
+	}
+	stats.TotalExams = int(totalExams)
+
+	// 进行中的考试数
+	now := time.Now()
+	var activeExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).
+		Where("status = ? AND start_time <= ? AND end_time >= ?", "published", now, now).
+		Count(&activeExams).Error
+	if err != nil {
+		return
+	}
+	stats.ActiveExams = int(activeExams)
+
+	// 已结束的考试数
+	var completedExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).
+		Where("status = ? AND end_time < ?", "published", now).
+		Count(&completedExams).Error
+	if err != nil {
+		return
+	}
+	stats.CompletedExams = int(completedExams)
+
+	// 草稿考试数
+	var draftExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Exam{}).
+		Where("status = ?", "draft").
+		Count(&draftExams).Error
+	if err != nil {
+		return
+	}
+	stats.DraftExams = int(draftExams)
+
+	return
+}
+
+// loadCourseInfo 加载课程信息
+func (examService *ExamService) loadCourseInfo(ctx context.Context, exam *learning.Exam) {
+	if exam.CourseId != 0 {
+		var course learning.Course
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", exam.CourseId).First(&course).Error; err == nil {
+			exam.Course = course
+		}
+	}
+}

server/service/learning/knowledge_point.go

@@ -0,0 +1,126 @@
+package learning
+
+import (
+	"context"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type KnowledgePointService struct{}
+
+// CreateKnowledgePoint 创建知识点
+func (knowledgePointService *KnowledgePointService) CreateKnowledgePoint(ctx context.Context, knowledgePoint *learning.KnowledgePoint) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Create(knowledgePoint).Error
+	return err
+}
+
+// DeleteKnowledgePoint 删除知识点
+func (knowledgePointService *KnowledgePointService) DeleteKnowledgePoint(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.KnowledgePoint{}, ID).Error
+	return err
+}
+
+// DeleteKnowledgePointByIds 批量删除知识点
+func (knowledgePointService *KnowledgePointService) DeleteKnowledgePointByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.KnowledgePoint{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateKnowledgePoint 更新知识点
+func (knowledgePointService *KnowledgePointService) UpdateKnowledgePoint(ctx context.Context, knowledgePoint learning.KnowledgePoint) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.KnowledgePoint{}).Where("id = ?", knowledgePoint.ID).Updates(&knowledgePoint).Error
+	return err
+}
+
+// GetKnowledgePoint 根据ID获取知识点
+func (knowledgePointService *KnowledgePointService) GetKnowledgePoint(ctx context.Context, ID string) (knowledgePoint learning.KnowledgePoint, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&knowledgePoint).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的章节信息
+	if knowledgePoint.ChapterId != 0 {
+		var chapter learning.Chapter
+		chapterErr := global.GVA_DB.WithContext(ctx).Where("id = ?", knowledgePoint.ChapterId).First(&chapter).Error
+		if chapterErr == nil {
+			knowledgePoint.Chapter = chapter
+		}
+	}
+	return
+}
+
+// GetKnowledgePointInfoList 分页获取知识点列表
+func (knowledgePointService *KnowledgePointService) GetKnowledgePointInfoList(ctx context.Context, info learningReq.KnowledgePointSearch) (list []learning.KnowledgePoint, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.KnowledgePoint{})
+	var knowledgePoints []learning.KnowledgePoint
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.Title != "" {
+		db = db.Where("title LIKE ?", "%"+info.Title+"%")
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	if info.ChapterId != 0 {
+		db = db.Where("chapter_id = ?", info.ChapterId)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("sort asc, created_at desc").Find(&knowledgePoints).Error
+	if err != nil {
+		return knowledgePoints, total, err
+	}
+
+	// 手动查询关联的章节信息
+	chapterIds := make([]uint, 0)
+	chapterMap := make(map[uint]learning.Chapter)
+
+	for _, kp := range knowledgePoints {
+		if kp.ChapterId != 0 {
+			chapterIds = append(chapterIds, kp.ChapterId)
+		}
+	}
+
+	if len(chapterIds) > 0 {
+		var chapters []learning.Chapter
+		global.GVA_DB.WithContext(ctx).Where("id in ?", chapterIds).Find(&chapters)
+		for _, chapter := range chapters {
+			chapterMap[chapter.ID] = chapter
+		}
+
+		// 为每个知识点设置章节信息
+		for i := range knowledgePoints {
+			if chapter, exists := chapterMap[knowledgePoints[i].ChapterId]; exists {
+				knowledgePoints[i].Chapter = chapter
+			}
+		}
+	}
+
+	return knowledgePoints, total, err
+}
+
+// GetKnowledgePointsByChapter 根据章节ID获取知识点列表
+func (knowledgePointService *KnowledgePointService) GetKnowledgePointsByChapter(ctx context.Context, chapterId uint) (list []learning.KnowledgePoint, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("chapter_id = ? AND status = ?", chapterId, "published").Order("sort asc, created_at asc").Find(&list).Error
+	return
+}
+
+// UpdateKnowledgePointStatus 更新知识点状态
+func (knowledgePointService *KnowledgePointService) UpdateKnowledgePointStatus(ctx context.Context, ID string, status string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.KnowledgePoint{}).Where("id = ?", ID).Update("status", status).Error
+	return err
+}

server/service/learning/question.go

@@ -0,0 +1,129 @@
+package learning
+
+import (
+	"context"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type QuestionService struct{}
+
+// CreateQuestion 创建题目
+func (questionService *QuestionService) CreateQuestion(ctx context.Context, question *learning.Question) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Create(question).Error
+	return err
+}
+
+// DeleteQuestion 删除题目
+func (questionService *QuestionService) DeleteQuestion(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.Question{}, ID).Error
+	return err
+}
+
+// DeleteQuestionByIds 批量删除题目
+func (questionService *QuestionService) DeleteQuestionByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.Question{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateQuestion 更新题目
+func (questionService *QuestionService) UpdateQuestion(ctx context.Context, question learning.Question) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.Question{}).Where("id = ?", question.ID).Updates(&question).Error
+	return err
+}
+
+// GetQuestion 根据ID获取题目
+func (questionService *QuestionService) GetQuestion(ctx context.Context, ID string) (question learning.Question, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&question).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的知识点信息
+	if question.KnowledgePointId != 0 {
+		var knowledgePoint learning.KnowledgePoint
+		kpErr := global.GVA_DB.WithContext(ctx).Where("id = ?", question.KnowledgePointId).First(&knowledgePoint).Error
+		if kpErr == nil {
+			question.KnowledgePoint = knowledgePoint
+		}
+	}
+	return
+}
+
+// GetQuestionInfoList 分页获取题目列表
+func (questionService *QuestionService) GetQuestionInfoList(ctx context.Context, info learningReq.QuestionSearch) (list []learning.Question, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.Question{})
+	var questions []learning.Question
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.Title != "" {
+		db = db.Where("title LIKE ?", "%"+info.Title+"%")
+	}
+	if info.Type != "" {
+		db = db.Where("type = ?", info.Type)
+	}
+	if info.Difficulty != "" {
+		db = db.Where("difficulty = ?", info.Difficulty)
+	}
+	if info.KnowledgePointId != 0 {
+		db = db.Where("knowledge_point_id = ?", info.KnowledgePointId)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("created_at desc").Find(&questions).Error
+	if err != nil {
+		return questions, total, err
+	}
+
+	// 手动查询关联的知识点信息
+	kpIds := make([]uint, 0)
+	kpMap := make(map[uint]learning.KnowledgePoint)
+
+	for _, q := range questions {
+		if q.KnowledgePointId != 0 {
+			kpIds = append(kpIds, q.KnowledgePointId)
+		}
+	}
+
+	if len(kpIds) > 0 {
+		var knowledgePoints []learning.KnowledgePoint
+		global.GVA_DB.WithContext(ctx).Where("id in ?", kpIds).Find(&knowledgePoints)
+		for _, kp := range knowledgePoints {
+			kpMap[kp.ID] = kp
+		}
+
+		// 为每个题目设置知识点信息
+		for i := range questions {
+			if kp, exists := kpMap[questions[i].KnowledgePointId]; exists {
+				questions[i].KnowledgePoint = kp
+			}
+		}
+	}
+
+	return questions, total, err
+}
+
+// GetQuestionsByKnowledgePoint 根据知识点ID获取题目列表
+func (questionService *QuestionService) GetQuestionsByKnowledgePoint(ctx context.Context, knowledgePointId uint) (list []learning.Question, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("knowledge_point_id = ?", knowledgePointId).Order("created_at asc").Find(&list).Error
+	return
+}
+
+// GetRandomQuestionsByKnowledgePoint 根据知识点ID随机获取题目
+func (questionService *QuestionService) GetRandomQuestionsByKnowledgePoint(ctx context.Context, knowledgePointId uint, count int) (list []learning.Question, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("knowledge_point_id = ?", knowledgePointId).Order("RAND()").Limit(count).Find(&list).Error
+	return
+}

server/service/learning/user_exam.go

@@ -0,0 +1,327 @@
+package learning
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type UserExamService struct{}
+
+// CreateUserExam 创建用户考试记录
+func (userExamService *UserExamService) CreateUserExam(ctx context.Context, userExam *learning.UserExam) (err error) {
+	// 设置默认值
+	if userExam.Status == "" {
+		userExam.Status = "in_progress"
+	}
+	if userExam.AttemptNumber == 0 {
+		userExam.AttemptNumber = 1
+	}
+	if userExam.StartTime.IsZero() {
+		userExam.StartTime = time.Now()
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Create(userExam).Error
+	return err
+}
+
+// DeleteUserExam 删除用户考试记录
+func (userExamService *UserExamService) DeleteUserExam(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.UserExam{}, ID).Error
+	return err
+}
+
+// DeleteUserExamByIds 批量删除用户考试记录
+func (userExamService *UserExamService) DeleteUserExamByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.UserExam{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateUserExam 更新用户考试记录
+func (userExamService *UserExamService) UpdateUserExam(ctx context.Context, userExam learning.UserExam) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).Where("id = ?", userExam.ID).Updates(&userExam).Error
+	return err
+}
+
+// GetUserExam 根据ID获取用户考试记录
+func (userExamService *UserExamService) GetUserExam(ctx context.Context, ID string) (userExam learning.UserExam, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&userExam).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的考试信息
+	userExamService.loadExamInfo(ctx, &userExam)
+	return
+}
+
+// GetUserExamInfoList 分页获取用户考试记录列表
+func (userExamService *UserExamService) GetUserExamInfoList(ctx context.Context, info learningReq.UserExamSearch) (list []learning.UserExam, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{})
+	var userExams []learning.UserExam
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.UserId != 0 {
+		db = db.Where("user_id = ?", info.UserId)
+	}
+	if info.ExamId != 0 {
+		db = db.Where("exam_id = ?", info.ExamId)
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	if info.IsPassed {
+		db = db.Where("is_passed = ?", info.IsPassed)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("created_at desc").Find(&userExams).Error
+	if err != nil {
+		return userExams, total, err
+	}
+
+	// 批量加载关联的考试信息
+	for i := range userExams {
+		userExamService.loadExamInfo(ctx, &userExams[i])
+	}
+
+	return userExams, total, err
+}
+
+// StartExam 开始考试
+func (userExamService *UserExamService) StartExam(ctx context.Context, userId uint, examId uint) (userExam learning.UserExam, err error) {
+	// 检查考试是否存在且可以参加
+	var exam learning.Exam
+	err = global.GVA_DB.WithContext(ctx).Where("id = ? AND status = ?", examId, "published").First(&exam).Error
+	if err != nil {
+		return userExam, errors.New("考试不存在或未发布")
+	}
+
+	// 检查考试时间
+	now := time.Now()
+	if now.Before(exam.StartTime) {
+		return userExam, errors.New("考试尚未开始")
+	}
+	if now.After(exam.EndTime) {
+		return userExam, errors.New("考试已结束")
+	}
+
+	// 检查用户是否已经参加过考试
+	var existingCount int64
+	global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Where("user_id = ? AND exam_id = ?", userId, examId).
+		Count(&existingCount)
+
+	// 检查是否允许重考和尝试次数
+	if existingCount > 0 && !exam.AllowRetake {
+		return userExam, errors.New("该考试不允许重考")
+	}
+	if existingCount >= int64(exam.MaxAttempts) {
+		return userExam, errors.New("已达到最大尝试次数")
+	}
+
+	// 创建考试记录
+	userExam = learning.UserExam{
+		UserId:        userId,
+		ExamId:        examId,
+		AttemptNumber: int(existingCount) + 1,
+		StartTime:     now,
+		Status:        "in_progress",
+	}
+
+	err = userExamService.CreateUserExam(ctx, &userExam)
+	if err != nil {
+		return userExam, err
+	}
+
+	// 加载考试信息
+	userExamService.loadExamInfo(ctx, &userExam)
+
+	return userExam, nil
+}
+
+// SubmitExam 提交考试
+func (userExamService *UserExamService) SubmitExam(ctx context.Context, userExamId uint, totalScore int, correctCount int, wrongCount int) (err error) {
+	var userExam learning.UserExam
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", userExamId).First(&userExam).Error
+	if err != nil {
+		return errors.New("考试记录不存在")
+	}
+
+	if userExam.Status != "in_progress" {
+		return errors.New("考试已结束，无法重复提交")
+	}
+
+	// 获取考试信息
+	var exam learning.Exam
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", userExam.ExamId).First(&exam).Error
+	if err != nil {
+		return err
+	}
+
+	// 计算考试时长
+	now := time.Now()
+	duration := int(now.Sub(userExam.StartTime).Minutes())
+
+	// 判断是否通过
+	isPassed := totalScore >= exam.PassScore
+
+	// 更新考试记录
+	updates := map[string]interface{}{
+		"end_time":      now,
+		"submitted_at":  now,
+		"duration":      duration,
+		"total_score":   totalScore,
+		"correct_count": correctCount,
+		"wrong_count":   wrongCount,
+		"status":        "completed",
+		"is_passed":     isPassed,
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Where("id = ?", userExamId).
+		Updates(updates).Error
+
+	return err
+}
+
+// GetUserExamHistory 获取用户考试历史
+func (userExamService *UserExamService) GetUserExamHistory(ctx context.Context, userId uint) (list []learning.UserExam, err error) {
+	err = global.GVA_DB.WithContext(ctx).
+		Where("user_id = ?", userId).
+		Order("created_at desc").
+		Find(&list).Error
+
+	// 批量加载关联的考试信息
+	for i := range list {
+		userExamService.loadExamInfo(ctx, &list[i])
+	}
+
+	return
+}
+
+// GetUserExamStatistics 获取用户考试统计
+func (userExamService *UserExamService) GetUserExamStatistics(ctx context.Context, userId uint) (stats learningReq.UserExamStatistics, err error) {
+	// 总考试次数
+	var totalExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Where("user_id = ? AND status = ?", userId, "completed").
+		Count(&totalExams).Error
+	if err != nil {
+		return
+	}
+	stats.TotalExams = int(totalExams)
+
+	if totalExams == 0 {
+		return stats, nil
+	}
+
+	// 通过考试次数
+	var passedExams int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Where("user_id = ? AND status = ? AND is_passed = ?", userId, "completed", true).
+		Count(&passedExams).Error
+	if err != nil {
+		return
+	}
+	stats.PassedExams = int(passedExams)
+	stats.FailedExams = stats.TotalExams - stats.PassedExams
+
+	// 平均分数和最高分数
+	var result struct {
+		AverageScore float64
+		HighestScore int
+		TotalTime    int
+	}
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Select("AVG(total_score) as average_score, MAX(total_score) as highest_score, SUM(duration) as total_time").
+		Where("user_id = ? AND status = ?", userId, "completed").
+		Scan(&result).Error
+	if err != nil {
+		return
+	}
+
+	stats.AverageScore = result.AverageScore
+	stats.HighestScore = result.HighestScore
+	stats.TotalStudyTime = result.TotalTime
+
+	// 通过率
+	if stats.TotalExams > 0 {
+		stats.PassRate = float64(stats.PassedExams) / float64(stats.TotalExams) * 100
+	}
+
+	return
+}
+
+// GetExamRanking 获取考试排行榜
+func (userExamService *UserExamService) GetExamRanking(ctx context.Context, examId uint, limit int) (ranking learningReq.ExamRankingResponse, err error) {
+	// 获取考试信息
+	var exam learning.Exam
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", examId).First(&exam).Error
+	if err != nil {
+		return
+	}
+
+	ranking.ExamId = examId
+	ranking.ExamTitle = exam.Title
+
+	// 获取排行榜数据
+	var userExams []learning.UserExam
+	db := global.GVA_DB.WithContext(ctx).
+		Where("exam_id = ? AND status = ?", examId, "completed").
+		Order("total_score desc, duration asc")
+
+	if limit > 0 {
+		db = db.Limit(limit)
+	}
+
+	err = db.Find(&userExams).Error
+	if err != nil {
+		return
+	}
+
+	// 构建排行榜
+	for i, userExam := range userExams {
+		item := learningReq.ExamRankingItem{
+			UserId:      userExam.UserId,
+			Score:       userExam.TotalScore,
+			Duration:    userExam.Duration,
+			Rank:        i + 1,
+			IsPassed:    userExam.IsPassed,
+			SubmittedAt: userExam.SubmittedAt,
+		}
+		ranking.Rankings = append(ranking.Rankings, item)
+	}
+
+	// 获取总数
+	global.GVA_DB.WithContext(ctx).Model(&learning.UserExam{}).
+		Where("exam_id = ? AND status = ?", examId, "completed").
+		Count(&ranking.Total)
+
+	return
+}
+
+// loadExamInfo 加载考试信息
+func (userExamService *UserExamService) loadExamInfo(ctx context.Context, userExam *learning.UserExam) {
+	if userExam.ExamId != 0 {
+		var exam learning.Exam
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", userExam.ExamId).First(&exam).Error; err == nil {
+			userExam.Exam = exam
+		}
+	}
+}

server/service/learning/user_learning.go

@@ -0,0 +1,202 @@
+package learning
+
+import (
+	"context"
+	"time"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type UserLearningService struct{}
+
+// CreateUserLearning 创建用户学习记录
+func (userLearningService *UserLearningService) CreateUserLearning(ctx context.Context, userLearning *learning.UserLearning) (err error) {
+	// 检查是否已存在该用户对该课程的学习记录
+	var existingRecord learning.UserLearning
+	err = global.GVA_DB.WithContext(ctx).Where("user_id = ? AND course_id = ?", userLearning.UserId, userLearning.CourseId).First(&existingRecord).Error
+	if err == nil {
+		// 如果已存在，更新记录
+		return userLearningService.UpdateUserLearning(ctx, *userLearning)
+	}
+
+	// 设置默认值
+	if userLearning.LastStudyAt.IsZero() {
+		userLearning.LastStudyAt = time.Now()
+	}
+	if userLearning.Status == "" {
+		userLearning.Status = "learning"
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Create(userLearning).Error
+	return err
+}
+
+// DeleteUserLearning 删除用户学习记录
+func (userLearningService *UserLearningService) DeleteUserLearning(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.UserLearning{}, ID).Error
+	return err
+}
+
+// DeleteUserLearningByIds 批量删除用户学习记录
+func (userLearningService *UserLearningService) DeleteUserLearningByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.UserLearning{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateUserLearning 更新用户学习记录
+func (userLearningService *UserLearningService) UpdateUserLearning(ctx context.Context, userLearning learning.UserLearning) (err error) {
+	// 更新最后学习时间
+	userLearning.LastStudyAt = time.Now()
+
+	// 如果进度达到100%，设置完成状态和完成时间
+	if userLearning.Progress >= 100 && userLearning.Status != "completed" {
+		userLearning.Status = "completed"
+		userLearning.CompletedAt = time.Now()
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{}).Where("id = ?", userLearning.ID).Updates(&userLearning).Error
+	return err
+}
+
+// GetUserLearning 根据ID获取用户学习记录
+func (userLearningService *UserLearningService) GetUserLearning(ctx context.Context, ID string) (userLearning learning.UserLearning, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&userLearning).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联信息
+	userLearningService.loadAssociations(ctx, &userLearning)
+	return
+}
+
+// GetUserLearningInfoList 分页获取用户学习记录列表
+func (userLearningService *UserLearningService) GetUserLearningInfoList(ctx context.Context, info learningReq.UserLearningSearch) (list []learning.UserLearning, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{})
+	var userLearnings []learning.UserLearning
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.UserId != 0 {
+		db = db.Where("user_id = ?", info.UserId)
+	}
+	if info.CourseId != 0 {
+		db = db.Where("course_id = ?", info.CourseId)
+	}
+	if info.Status != "" {
+		db = db.Where("status = ?", info.Status)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("last_study_at desc").Find(&userLearnings).Error
+	if err != nil {
+		return userLearnings, total, err
+	}
+
+	// 批量加载关联信息
+	for i := range userLearnings {
+		userLearningService.loadAssociations(ctx, &userLearnings[i])
+	}
+
+	return userLearnings, total, err
+}
+
+// GetUserProgress 获取用户学习进度
+func (userLearningService *UserLearningService) GetUserProgress(ctx context.Context, userId uint, courseId uint) (progress []learning.UserLearning, err error) {
+	db := global.GVA_DB.WithContext(ctx).Where("user_id = ?", userId)
+	if courseId != 0 {
+		db = db.Where("course_id = ?", courseId)
+	}
+	err = db.Find(&progress).Error
+
+	// 批量加载关联信息
+	for i := range progress {
+		userLearningService.loadAssociations(ctx, &progress[i])
+	}
+
+	return
+}
+
+// GetLearningStatistics 获取用户学习统计
+func (userLearningService *UserLearningService) GetLearningStatistics(ctx context.Context, userId uint) (stats learningReq.LearningStatistics, err error) {
+	// 总课程数
+	var totalCourses int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{}).Where("user_id = ?", userId).Count(&totalCourses).Error
+	if err != nil {
+		return
+	}
+	stats.TotalCourses = int(totalCourses)
+
+	// 已完成课程数
+	var completedCourses int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{}).Where("user_id = ? AND status = ?", userId, "completed").Count(&completedCourses).Error
+	if err != nil {
+		return
+	}
+	stats.CompletedCourses = int(completedCourses)
+
+	// 学习中课程数
+	var inProgressCourses int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{}).Where("user_id = ? AND status = ?", userId, "learning").Count(&inProgressCourses).Error
+	if err != nil {
+		return
+	}
+	stats.InProgressCourses = int(inProgressCourses)
+
+	// 总学习时长和平均分数
+	var result struct {
+		TotalStudyTime int
+		AverageScore   int
+	}
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.UserLearning{}).
+		Select("SUM(study_time) as total_study_time, AVG(score) as average_score").
+		Where("user_id = ?", userId).
+		Scan(&result).Error
+	if err != nil {
+		return
+	}
+
+	stats.TotalStudyTime = result.TotalStudyTime
+	stats.AverageScore = result.AverageScore
+
+	return
+}
+
+// loadAssociations 加载关联信息
+func (userLearningService *UserLearningService) loadAssociations(ctx context.Context, userLearning *learning.UserLearning) {
+	// 加载课程信息
+	if userLearning.CourseId != 0 {
+		var course learning.Course
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", userLearning.CourseId).First(&course).Error; err == nil {
+			userLearning.Course = course
+		}
+	}
+
+	// 加载章节信息
+	if userLearning.ChapterId != 0 {
+		var chapter learning.Chapter
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", userLearning.ChapterId).First(&chapter).Error; err == nil {
+			userLearning.Chapter = chapter
+		}
+	}
+
+	// 加载知识点信息
+	if userLearning.KnowledgePointId != 0 {
+		var knowledgePoint learning.KnowledgePoint
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", userLearning.KnowledgePointId).First(&knowledgePoint).Error; err == nil {
+			userLearning.KnowledgePoint = knowledgePoint
+		}
+	}
+}

server/service/learning/wrong_question.go

@@ -0,0 +1,186 @@
+package learning
+
+import (
+	"context"
+	"time"
+
+	"github.com/flipped-aurora/gin-vue-admin/server/global"
+	"github.com/flipped-aurora/gin-vue-admin/server/model/learning"
+	learningReq "github.com/flipped-aurora/gin-vue-admin/server/model/learning/request"
+)
+
+type WrongQuestionService struct{}
+
+// CreateWrongQuestion 创建错题记录
+func (wrongQuestionService *WrongQuestionService) CreateWrongQuestion(ctx context.Context, wrongQuestion *learning.WrongQuestion) (err error) {
+	// 检查是否已存在该用户对该题目的错题记录
+	var existingRecord learning.WrongQuestion
+	err = global.GVA_DB.WithContext(ctx).Where("user_id = ? AND question_id = ?", wrongQuestion.UserId, wrongQuestion.QuestionId).First(&existingRecord).Error
+	if err == nil {
+		// 如果已存在，更新错误次数和最后错误时间
+		existingRecord.WrongCount++
+		existingRecord.LastWrongAt = time.Now()
+		existingRecord.WrongAnswer = wrongQuestion.WrongAnswer
+		existingRecord.IsMastered = false // 重新答错，标记为未掌握
+		existingRecord.MasteredAt = time.Time{}
+		return wrongQuestionService.UpdateWrongQuestion(ctx, existingRecord)
+	}
+
+	// 设置默认值
+	if wrongQuestion.LastWrongAt.IsZero() {
+		wrongQuestion.LastWrongAt = time.Now()
+	}
+	if wrongQuestion.WrongCount == 0 {
+		wrongQuestion.WrongCount = 1
+	}
+
+	err = global.GVA_DB.WithContext(ctx).Create(wrongQuestion).Error
+	return err
+}
+
+// DeleteWrongQuestion 删除错题记录
+func (wrongQuestionService *WrongQuestionService) DeleteWrongQuestion(ctx context.Context, ID string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&learning.WrongQuestion{}, ID).Error
+	return err
+}
+
+// DeleteWrongQuestionByIds 批量删除错题记录
+func (wrongQuestionService *WrongQuestionService) DeleteWrongQuestionByIds(ctx context.Context, IDs []string) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Delete(&[]learning.WrongQuestion{}, "id in ?", IDs).Error
+	return err
+}
+
+// UpdateWrongQuestion 更新错题记录
+func (wrongQuestionService *WrongQuestionService) UpdateWrongQuestion(ctx context.Context, wrongQuestion learning.WrongQuestion) (err error) {
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{}).Where("id = ?", wrongQuestion.ID).Updates(&wrongQuestion).Error
+	return err
+}
+
+// GetWrongQuestion 根据ID获取错题记录
+func (wrongQuestionService *WrongQuestionService) GetWrongQuestion(ctx context.Context, ID string) (wrongQuestion learning.WrongQuestion, err error) {
+	err = global.GVA_DB.WithContext(ctx).Where("id = ?", ID).First(&wrongQuestion).Error
+	if err != nil {
+		return
+	}
+	// 手动查询关联的题目信息
+	wrongQuestionService.loadQuestionInfo(ctx, &wrongQuestion)
+	return
+}
+
+// GetWrongQuestionInfoList 分页获取错题记录列表
+func (wrongQuestionService *WrongQuestionService) GetWrongQuestionInfoList(ctx context.Context, info learningReq.WrongQuestionSearch) (list []learning.WrongQuestion, total int64, err error) {
+	limit := info.PageSize
+	offset := info.PageSize * (info.Page - 1)
+	// 创建db
+	db := global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{})
+	var wrongQuestions []learning.WrongQuestion
+	// 如果有条件搜索 下方会自动创建搜索语句
+	if info.StartCreatedAt != nil && info.EndCreatedAt != nil {
+		db = db.Where("created_at BETWEEN ? AND ?", info.StartCreatedAt, info.EndCreatedAt)
+	}
+	if info.UserId != 0 {
+		db = db.Where("user_id = ?", info.UserId)
+	}
+	if info.QuestionId != 0 {
+		db = db.Where("question_id = ?", info.QuestionId)
+	}
+	if info.IsMastered {
+		db = db.Where("is_mastered = ?", info.IsMastered)
+	}
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	if limit != 0 {
+		db = db.Limit(limit).Offset(offset)
+	}
+
+	err = db.Order("last_wrong_at desc").Find(&wrongQuestions).Error
+	if err != nil {
+		return wrongQuestions, total, err
+	}
+
+	// 批量加载关联的题目信息
+	for i := range wrongQuestions {
+		wrongQuestionService.loadQuestionInfo(ctx, &wrongQuestions[i])
+	}
+
+	return wrongQuestions, total, err
+}
+
+// GetUserWrongQuestions 获取用户的错题列表
+func (wrongQuestionService *WrongQuestionService) GetUserWrongQuestions(ctx context.Context, userId uint, onlyUnmastered bool) (list []learning.WrongQuestion, err error) {
+	db := global.GVA_DB.WithContext(ctx).Where("user_id = ?", userId)
+	if onlyUnmastered {
+		db = db.Where("is_mastered = ?", false)
+	}
+	err = db.Order("last_wrong_at desc").Find(&list).Error
+
+	// 批量加载关联的题目信息
+	for i := range list {
+		wrongQuestionService.loadQuestionInfo(ctx, &list[i])
+	}
+
+	return
+}
+
+// MarkAsMastered 标记题目为已掌握
+func (wrongQuestionService *WrongQuestionService) MarkAsMastered(ctx context.Context, userId uint, wrongQuestionId uint) (err error) {
+	updates := map[string]interface{}{
+		"is_mastered": true,
+		"mastered_at": time.Now(),
+	}
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{}).
+		Where("id = ? AND user_id = ?", wrongQuestionId, userId).
+		Updates(updates).Error
+	return err
+}
+
+// GetWrongQuestionStatistics 获取用户错题统计
+func (wrongQuestionService *WrongQuestionService) GetWrongQuestionStatistics(ctx context.Context, userId uint) (stats learningReq.WrongQuestionStatistics, err error) {
+	// 总错题数
+	var totalWrongQuestions int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{}).Where("user_id = ?", userId).Count(&totalWrongQuestions).Error
+	if err != nil {
+		return
+	}
+	stats.TotalWrongQuestions = int(totalWrongQuestions)
+
+	// 已掌握题目数
+	var masteredQuestions int64
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{}).Where("user_id = ? AND is_mastered = ?", userId, true).Count(&masteredQuestions).Error
+	if err != nil {
+		return
+	}
+	stats.MasteredQuestions = int(masteredQuestions)
+
+	// 未掌握题目数
+	stats.UnmasteredQuestions = stats.TotalWrongQuestions - stats.MasteredQuestions
+
+	// 平均错误次数
+	var result struct {
+		AverageWrongCount float64
+	}
+	err = global.GVA_DB.WithContext(ctx).Model(&learning.WrongQuestion{}).
+		Select("AVG(wrong_count) as average_wrong_count").
+		Where("user_id = ?", userId).
+		Scan(&result).Error
+	if err != nil {
+		return
+	}
+
+	stats.AverageWrongCount = int(result.AverageWrongCount)
+
+	return
+}
+
+// loadQuestionInfo 加载题目信息
+func (wrongQuestionService *WrongQuestionService) loadQuestionInfo(ctx context.Context, wrongQuestion *learning.WrongQuestion) {
+	if wrongQuestion.QuestionId != 0 {
+		var question learning.Question
+		if err := global.GVA_DB.WithContext(ctx).Where("id = ?", wrongQuestion.QuestionId).First(&question).Error; err == nil {
+			wrongQuestion.Question = question
+		}
+	}
+}