Immediate value presentation when adding datapoint to trigger

main.go

@@ -951,7 +951,22 @@ func actionTriggerDatapointAdd(w http.ResponseWriter, r *http.Request, _ *sessio
 		return
 	}
 
-	j, _ := json.Marshal(struct{ OK bool }{OK: true})
+	// Also retrieve the datapoint to get the latest value
+	// for immediate presentation when added.
+	dp, err := DatapointRetrieve(0, dpName)
+	if err != nil {
+		httpError(w, werr.Wrap(err).WithData(dpName).Log())
+		return
+	}
+	dp.LastDatapointValue.TemplateValue = dp.LastDatapointValue.Value()
+	j, _ := json.Marshal(
+		struct {
+			OK        bool
+			Datapoint Datapoint
+		}{
+			true,
+			dp,
+		})
 	w.Header().Add("Content-Type", "application/json")
 	w.Write(j)
 } // }}}

static/js/trigger_edit.mjs

@@ -158,7 +158,7 @@ export class Trigger {
 					alert(json.Error)
 					return
 				}
-				this.datapoints[dp.Name] = dp
+				this.datapoints[dp.Name] = json.Datapoint
 			})
 	}//}}}
 }