Access control: Support uids for resource permissions (#45226)

* add middleware to solve uid -> id for requests

pkg/services/accesscontrol/resourcepermissions/middleware.go

@@ -0,0 +1,28 @@
+package resourcepermissions
+
+import (
+	"context"
+	"net/http"
+	"strconv"
+
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/util"
+	"github.com/grafana/grafana/pkg/web"
+)
+
+type uidSolver func(ctx context.Context, orgID int64, uid string) (int64, error)
+
+func solveUID(solve uidSolver) web.Handler {
+	return func(c *models.ReqContext) {
+		if solve != nil && util.IsValidShortUID(web.Params(c.Req)[":resourceID"]) {
+			params := web.Params(c.Req)
+			id, err := solve(c.Req.Context(), c.OrgId, params[":resourceID"])
+			if err != nil {
+				c.JsonApiErr(http.StatusNotFound, "Resource not found", err)
+				return
+			}
+			params[":resourceID"] = strconv.FormatInt(id, 10)
+			web.SetURLParams(c.Req, params)
+		}
+	}
+}