feat: add study session APIs and per-user review isolation

memora-api/internal/handler/word.go

@@ -16,6 +16,18 @@ type WordHandler struct {
 	wordService *service.WordService
 }
 
+func userIDFromContext(c *gin.Context) int64 {
+	v, ok := c.Get("user_id")
+	if !ok {
+		return 1
+	}
+	uid, ok := v.(int64)
+	if !ok || uid <= 0 {
+		return 1
+	}
+	return uid
+}
+
 func NewWordHandler(wordService *service.WordService) *WordHandler {
 	return &WordHandler{wordService: wordService}
 }
@@ -41,7 +53,7 @@ func (h *WordHandler) AddWord(c *gin.Context) {
 	}
 
 	// 保存到数据库
-	word, err := h.wordService.SaveWord(req.Word, youdaoResp)
+	word, err := h.wordService.SaveWord(userIDFromContext(c), req.Word, youdaoResp)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "保存失败: " + err.Error()})
 		return
@@ -58,7 +70,7 @@ func (h *WordHandler) GetReviewWords(c *gin.Context) {
 	mode := c.DefaultQuery("mode", "spelling")
 	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "10"))
 
-	words, err := h.wordService.GetReviewWords(mode, limit)
+	words, err := h.wordService.GetReviewWords(userIDFromContext(c), mode, limit)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
@@ -75,7 +87,7 @@ func (h *WordHandler) SubmitReview(c *gin.Context) {
 		return
 	}
 
-	result, err := h.wordService.SubmitReviewAnswer(req)
+	result, err := h.wordService.SubmitReviewAnswer(userIDFromContext(c), req)
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
@@ -103,7 +115,7 @@ func (h *WordHandler) GetWords(c *gin.Context) {
 
 // 获取统计信息
 func (h *WordHandler) GetStatistics(c *gin.Context) {
-	stats, err := h.wordService.GetStatistics()
+	stats, err := h.wordService.GetStatistics(userIDFromContext(c))
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
@@ -138,3 +150,32 @@ func (h *WordHandler) GetAudio(c *gin.Context) {
 	path := "./audio/" + filename
 	c.File(path)
 }
+
+func (h *WordHandler) CreateStudySession(c *gin.Context) {
+	var req request.CreateStudySessionRequest
+	_ = c.ShouldBindJSON(&req)
+
+	words, err := h.wordService.CreateStudySession(userIDFromContext(c), req.Limit)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"data": words})
+}
+
+func (h *WordHandler) SubmitStudyAnswer(c *gin.Context) {
+	var req request.SubmitStudyAnswerRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	result, err := h.wordService.SubmitStudyAnswer(userIDFromContext(c), req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"data": result})
+}