首次提交：姜十三论坛

后端 Go+Gin：认证/CSRF/限流、板块、帖子、评论、点赞、通知、用户资料、置顶推荐；前端 Next.js 16：发帖/编辑/删除、搜索、分页、点赞、通知中心、设置；基础设施 docker-compose 与配置模板；添加 .gitignore 与专有许可证（保留所有权利）

backend/handler/comment.go

@@ -0,0 +1,70 @@
+package handler
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/freefire/jiang13-bbs/middleware"
+	"github.com/freefire/jiang13-bbs/model"
+	"github.com/gin-gonic/gin"
+)
+
+// PostComments 获取帖子评论
+func (h *Handlers) PostComments(c *gin.Context) {
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的帖子 ID"})
+		return
+	}
+	comments, err := h.Comment.ListByPost(uint(id))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"comments": comments})
+}
+
+// CreateCommentRequest 评论请求
+type CreateCommentRequest struct {
+	Content string `json:"content" binding:"required,min=1"`
+}
+
+// CreateComment 创建评论
+func (h *Handlers) CreateComment(c *gin.Context) {
+	claims := middleware.CurrentUser(c)
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的帖子 ID"})
+		return
+	}
+	var req CreateCommentRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	comment, err := h.Comment.Create(claims.ID, uint(id), req.Content)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	// 通知帖子作者（排除自己评论自己的帖子）
+	if authorID, e := h.Post.GetAuthorID(uint(id)); e == nil {
+		h.Notification.Create(authorID, claims.ID, model.NotificationTypeComment, uint(id), comment.ID, req.Content)
+	}
+	c.JSON(http.StatusOK, gin.H{"comment": comment})
+}
+
+// DeleteComment 删除评论
+func (h *Handlers) DeleteComment(c *gin.Context) {
+	claims := middleware.CurrentUser(c)
+	cid, err := strconv.ParseUint(c.Param("cid"), 10, 64)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的评论 ID"})
+		return
+	}
+	if err := h.Comment.Delete(uint(cid), claims.ID, claims.Role); err != nil {
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "已删除"})
+}