yanlongqi
52fff11f07
## 后端实现 - 添加考试数据模型 (Exam) - 实现考试生成API (/api/exam/generate) - 实现获取考试详情API (/api/exam/:id) - 实现提交考试API (/api/exam/:id/submit) - 支持按题型随机抽取题目 - AI智能评分（简答题和论述题） - 自动计算总分和详细评分 ## 前端实现 - 首页添加"模拟考试"入口 - 考试准备页：显示考试说明，选择在线/打印模式 - 在线答题页：按题型分组显示，支持论述题二选一 - 试卷打印页：A4排版，支持打印试卷/答案 - 成绩报告页：显示总分、详细评分、错题分析 ## 核心特性 - 随机组卷：填空10题、判断10题、单选10题、多选10题、简答2题、论述题2选1 - 智能评分：使用AI评分论述题，给出分数、评语和建议 - 答题进度保存：使用localStorage防止刷新丢失 - 打印优化：A4纸张、黑白打印、合理排版 - 响应式设计：适配移动端、平板和PC端 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
422 lines
12 KiB
Go
422 lines
12 KiB
Go
package handlers
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import (
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"ankao/internal/database"
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"ankao/internal/models"
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"ankao/internal/services"
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"encoding/json"
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"fmt"
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"log"
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"math/rand"
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"net/http"
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"strconv"
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"time"
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"github.com/gin-gonic/gin"
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)
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// GenerateExam 生成考试
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func GenerateExam(c *gin.Context) {
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userID, exists := c.Get("user_id")
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if !exists {
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c.JSON(http.StatusUnauthorized, gin.H{"success": false, "message": "未登录"})
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return
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}
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db := database.GetDB()
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// 使用默认配置
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config := models.DefaultExamConfig
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// 按题型随机抽取题目
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questionsByType := make(map[string][]models.PracticeQuestion)
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questionTypes := []struct {
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Type string
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Count int
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}{
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{"fill-in-blank", config.FillInBlank},
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{"true-false", config.TrueFalse},
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{"multiple-choice", config.MultipleChoice},
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{"multiple-selection", config.MultipleSelection},
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{"short-answer", config.ShortAnswer},
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{"ordinary-essay", config.OrdinaryEssay},
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{"management-essay", config.ManagementEssay},
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}
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var allQuestionIDs []uint
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for _, qt := range questionTypes {
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var questions []models.PracticeQuestion
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if err := db.Where("type = ?", qt.Type).Find(&questions).Error; err != nil {
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log.Printf("查询题目失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "查询题目失败"})
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return
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}
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// 检查题目数量是否足够
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if len(questions) < qt.Count {
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c.JSON(http.StatusBadRequest, gin.H{
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"success": false,
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"message": fmt.Sprintf("题型 %s 题目数量不足，需要 %d 道，实际 %d 道", qt.Type, qt.Count, len(questions)),
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})
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return
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}
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// 随机抽取 (Fisher-Yates 洗牌算法)
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rand.Seed(time.Now().UnixNano())
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for i := len(questions) - 1; i > 0; i-- {
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j := rand.Intn(i + 1)
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questions[i], questions[j] = questions[j], questions[i]
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}
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selectedQuestions := questions[:qt.Count]
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questionsByType[qt.Type] = selectedQuestions
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// 收集题目ID
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for _, q := range selectedQuestions {
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allQuestionIDs = append(allQuestionIDs, q.ID)
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}
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}
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// 将题目ID列表转为JSON
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questionIDsJSON, err := json.Marshal(allQuestionIDs)
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if err != nil {
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log.Printf("序列化题目ID失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "生成考试失败"})
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return
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}
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// 创建考试记录
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exam := models.Exam{
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UserID: userID.(uint),
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QuestionIDs: string(questionIDsJSON),
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Status: "draft",
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}
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if err := db.Create(&exam).Error; err != nil {
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log.Printf("创建考试记录失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "创建考试失败"})
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return
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}
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// 返回考试信息
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c.JSON(http.StatusOK, gin.H{
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"success": true,
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"data": gin.H{
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"exam_id": exam.ID,
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"question_ids": allQuestionIDs,
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"created_at": exam.CreatedAt,
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},
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})
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}
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// GetExam 获取考试详情
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func GetExam(c *gin.Context) {
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userID, exists := c.Get("user_id")
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if !exists {
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c.JSON(http.StatusUnauthorized, gin.H{"success": false, "message": "未登录"})
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return
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}
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examIDStr := c.Param("id")
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examID, err := strconv.ParseUint(examIDStr, 10, 32)
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if err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "无效的考试ID"})
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return
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}
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db := database.GetDB()
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// 查询考试记录
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var exam models.Exam
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if err := db.Where("id = ? AND user_id = ?", examID, userID).First(&exam).Error; err != nil {
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c.JSON(http.StatusNotFound, gin.H{"success": false, "message": "考试不存在"})
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return
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}
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// 解析题目ID列表
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var questionIDs []uint
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if err := json.Unmarshal([]byte(exam.QuestionIDs), &questionIDs); err != nil {
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log.Printf("解析题目ID失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "解析考试数据失败"})
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return
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}
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// 查询题目详情
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var questions []models.PracticeQuestion
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if err := db.Where("id IN ?", questionIDs).Find(&questions).Error; err != nil {
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log.Printf("查询题目失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "查询题目失败"})
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return
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}
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// 按原始顺序排序题目
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questionMap := make(map[uint]models.PracticeQuestion)
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for _, q := range questions {
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questionMap[q.ID] = q
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}
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orderedQuestions := make([]models.PracticeQuestion, 0, len(questionIDs))
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for _, id := range questionIDs {
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if q, ok := questionMap[id]; ok {
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orderedQuestions = append(orderedQuestions, q)
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}
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}
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// 是否显示答案
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showAnswer := c.Query("show_answer") == "true"
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if !showAnswer {
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// 不显示答案时，隐藏答案字段
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for i := range orderedQuestions {
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orderedQuestions[i].AnswerData = ""
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}
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}
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c.JSON(http.StatusOK, gin.H{
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"success": true,
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"data": gin.H{
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"exam": exam,
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"questions": orderedQuestions,
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},
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})
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}
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// SubmitExam 提交考试
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func SubmitExam(c *gin.Context) {
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userID, exists := c.Get("user_id")
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if !exists {
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c.JSON(http.StatusUnauthorized, gin.H{"success": false, "message": "未登录"})
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return
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}
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examIDStr := c.Param("id")
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examID, err := strconv.ParseUint(examIDStr, 10, 32)
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if err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "无效的考试ID"})
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return
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}
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// 解析请求体
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var req struct {
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Answers map[string]interface{} `json:"answers"` // question_id -> answer
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EssayChoice string `json:"essay_choice"` // 论述题选择: ordinary 或 management
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}
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "无效的请求数据"})
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return
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}
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db := database.GetDB()
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// 查询考试记录
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var exam models.Exam
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if err := db.Where("id = ? AND user_id = ?", examID, userID).First(&exam).Error; err != nil {
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c.JSON(http.StatusNotFound, gin.H{"success": false, "message": "考试不存在"})
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return
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}
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// 检查是否已提交
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if exam.Status == "submitted" {
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c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "考试已提交"})
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return
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}
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// 解析题目ID列表
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var questionIDs []uint
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if err := json.Unmarshal([]byte(exam.QuestionIDs), &questionIDs); err != nil {
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log.Printf("解析题目ID失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "解析考试数据失败"})
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return
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}
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// 查询题目详情
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var questions []models.PracticeQuestion
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if err := db.Where("id IN ?", questionIDs).Find(&questions).Error; err != nil {
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log.Printf("查询题目失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "查询题目失败"})
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return
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}
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// 评分
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totalScore := 0.0
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scoreConfig := models.DefaultScoreConfig
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aiService := services.NewAIGradingService()
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detailedResults := make(map[string]interface{})
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for _, question := range questions {
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questionIDStr := fmt.Sprintf("%d", question.ID)
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userAnswerRaw, answered := req.Answers[questionIDStr]
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if !answered {
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detailedResults[questionIDStr] = gin.H{
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"correct": false,
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"score": 0,
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"message": "未作答",
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}
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continue
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}
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// 论述题特殊处理：根据用户选择判断是否计分
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if question.Type == "ordinary-essay" && req.EssayChoice != "ordinary" {
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detailedResults[questionIDStr] = gin.H{
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"correct": false,
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"score": 0,
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"message": "未选择此题",
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}
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continue
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}
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if question.Type == "management-essay" && req.EssayChoice != "management" {
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detailedResults[questionIDStr] = gin.H{
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"correct": false,
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"score": 0,
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"message": "未选择此题",
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}
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continue
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}
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// 根据题型判断答案
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var isCorrect bool
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var score float64
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var aiGrading *models.AIGrading
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switch question.Type {
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case "fill-in-blank":
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// 填空题：比较数组
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userAnswerArr, ok := userAnswerRaw.([]interface{})
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if !ok {
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detailedResults[questionIDStr] = gin.H{"correct": false, "score": 0, "message": "答案格式错误"}
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continue
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}
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var correctAnswers []string
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if err := json.Unmarshal([]byte(question.AnswerData), &correctAnswers); err != nil {
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log.Printf("解析填空题答案失败: %v", err)
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continue
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}
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isCorrect = true
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for i, ua := range userAnswerArr {
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if i >= len(correctAnswers) || fmt.Sprintf("%v", ua) != correctAnswers[i] {
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isCorrect = false
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break
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}
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}
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if isCorrect {
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score = scoreConfig.FillInBlank
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}
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case "true-false":
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// 判断题
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var correctAnswer string
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if err := json.Unmarshal([]byte(question.AnswerData), &correctAnswer); err != nil {
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log.Printf("解析判断题答案失败: %v", err)
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continue
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}
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isCorrect = fmt.Sprintf("%v", userAnswerRaw) == correctAnswer
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if isCorrect {
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score = scoreConfig.TrueFalse
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}
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case "multiple-choice":
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// 单选题
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var correctAnswer string
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if err := json.Unmarshal([]byte(question.AnswerData), &correctAnswer); err != nil {
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log.Printf("解析单选题答案失败: %v", err)
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continue
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}
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isCorrect = fmt.Sprintf("%v", userAnswerRaw) == correctAnswer
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if isCorrect {
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score = scoreConfig.MultipleChoice
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}
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case "multiple-selection":
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// 多选题：比较数组（顺序无关）
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userAnswerArr, ok := userAnswerRaw.([]interface{})
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if !ok {
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detailedResults[questionIDStr] = gin.H{"correct": false, "score": 0, "message": "答案格式错误"}
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continue
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}
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var correctAnswers []string
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if err := json.Unmarshal([]byte(question.AnswerData), &correctAnswers); err != nil {
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log.Printf("解析多选题答案失败: %v", err)
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continue
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}
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userAnswerSet := make(map[string]bool)
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for _, ua := range userAnswerArr {
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userAnswerSet[fmt.Sprintf("%v", ua)] = true
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}
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isCorrect = len(userAnswerSet) == len(correctAnswers)
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if isCorrect {
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for _, ca := range correctAnswers {
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if !userAnswerSet[ca] {
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isCorrect = false
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break
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}
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}
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}
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if isCorrect {
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score = scoreConfig.MultipleSelection
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}
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case "short-answer", "ordinary-essay", "management-essay":
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// 简答题和论述题：使用AI评分
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var correctAnswer string
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if err := json.Unmarshal([]byte(question.AnswerData), &correctAnswer); err != nil {
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log.Printf("解析简答题答案失败: %v", err)
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continue
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}
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userAnswerStr := fmt.Sprintf("%v", userAnswerRaw)
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aiResult, err := aiService.GradeShortAnswer(question.Question, correctAnswer, userAnswerStr)
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if err != nil {
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log.Printf("AI评分失败: %v", err)
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// AI评分失败时，给一个保守的分数
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isCorrect = false
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score = 0
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} else {
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isCorrect = aiResult.IsCorrect
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if question.Type == "short-answer" {
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// 简答题不计分，仅供参考
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score = 0
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} else {
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// 论述题按AI评分比例计算
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score = scoreConfig.Essay * (aiResult.Score / 100.0)
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}
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aiGrading = &models.AIGrading{
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Score: aiResult.Score,
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Feedback: aiResult.Feedback,
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Suggestion: aiResult.Suggestion,
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}
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}
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}
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totalScore += score
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detailedResults[questionIDStr] = gin.H{
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"correct": isCorrect,
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"score": score,
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"ai_grading": aiGrading,
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}
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}
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// 保存答案和分数
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answersJSON, err := json.Marshal(req.Answers)
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if err != nil {
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log.Printf("序列化答案失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "保存答案失败"})
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return
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}
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now := time.Now()
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exam.Answers = string(answersJSON)
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exam.Score = totalScore
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exam.Status = "submitted"
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exam.SubmittedAt = &now
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if err := db.Save(&exam).Error; err != nil {
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log.Printf("保存考试记录失败: %v", err)
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c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "保存考试失败"})
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return
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}
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c.JSON(http.StatusOK, gin.H{
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"success": true,
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"data": gin.H{
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"score": totalScore,
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"detailed_results": detailedResults,
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},
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})
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}
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