Better interactive graph support.

main.go

@@ -138,6 +138,7 @@ func main() { // {{{
 	service.Register("/datapoint/update/{id}", false, false, actionDatapointUpdate)
 	service.Register("/datapoint/delete/{id}", false, false, actionDatapointDelete)
 	service.Register("/datapoint/values/{id}", false, false, pageDatapointValues)
+	service.Register("/datapoint/json/{id}", false, false, actionDatapointJson)
 
 	service.Register("/triggers", false, false, pageTriggers)
 	service.Register("/trigger/create/{sectionID}/{name}", false, false, actionTriggerCreate)
@@ -750,6 +751,37 @@ func pageDatapointValues(w http.ResponseWriter, r *http.Request, _ *session.T) {
 	page.Render(w, r)
 	return
 } // }}}
+func actionDatapointJson(w http.ResponseWriter, r *http.Request, _ *session.T) { // {{{
+	idStr := r.PathValue("id")
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+
+	fromStr := r.URL.Query().Get("f")
+	from, err := time.ParseInLocation("2006-01-02 15:04:05", fromStr[0:min(19, len(fromStr))], smonConfig.Timezone())
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+
+	toStr := r.URL.Query().Get("t")
+	to, err := time.ParseInLocation("2006-01-02 15:04:05", toStr[0:min(19, len(toStr))], smonConfig.Timezone())
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+
+	values, err := DatapointValues(id, from, to)
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+
+	j, _ := json.Marshal(values)
+	w.Write(j)
+} // }}}
 
 func pageTriggers(w http.ResponseWriter, r *http.Request, _ *session.T) { // {{{
 	areas, err := TriggersRetrieve()