feat(canvas): TapNow - 支持公开画布导入 (#255)

(cherry picked from commit 9b96135a5e409b4718e6204ab4212b7ef22635aa)

backend/internal/handler/tapnow.go

@@ -0,0 +1,36 @@
+package handler
+
+import (
+	"net/http"
+	"strings"
+
+	"infinite-canvas/backend/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+func RegisterTapNowRoutes(r *gin.RouterGroup, svc *service.Service) {
+	r.POST("/canvas-projects/:id/import/tapnow", func(c *gin.Context) {
+		user, err := currentUser(c, svc)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		if user == nil {
+			failService(c, service.Unauthorized("请先登录"))
+			return
+		}
+		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 16<<10)
+		var req service.TapNowImportRequest
+		if err := c.ShouldBindJSON(&req); err != nil {
+			fail(c, http.StatusBadRequest, err)
+			return
+		}
+		result, err := svc.ImportTapNow(user.ID, c.Param("id"), strings.TrimSpace(req.ShareID))
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		ok(c, result)
+	})
+}