Bumped to v40

main.go

@@ -29,7 +29,7 @@ import (
 	"time"
 )
 
-const VERSION = "v39"
+const VERSION = "v40"
 
 var (
 	logger              *slog.Logger
@@ -663,6 +663,27 @@ func pageDatapointEdit(w http.ResponseWriter, r *http.Request, _ *session.T) { /
 		}
 	}
 
+	/* Triggers using this datapoint is provided as a list to update
+	 * if changing the datapoint name. Parsing expr and automatically
+	 * changing it to renamed datapoints would be nice in the future. */
+	var triggers []Trigger
+	triggers, err = TriggersRetrieveByDatapoint(datapoint.Name)
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+	slices.SortFunc(triggers, func(a, b Trigger) int {
+		an := strings.ToUpper(a.Name)
+		bn := strings.ToUpper(b.Name)
+		if an < bn {
+			return -1
+		}
+		if an > bn {
+			return 1
+		}
+		return 0
+	})
+
 	page := Page{
 		LAYOUT: "main",
 		PAGE:   "datapoint_edit",
@@ -674,6 +695,7 @@ func pageDatapointEdit(w http.ResponseWriter, r *http.Request, _ *session.T) { /
 
 	page.Data = map[string]any{
 		"Datapoint": datapoint,
+		"Triggers":  triggers,
 	}
 	page.Render(w, r)
 	return

sql/00027.sql

@@ -0,0 +1,22 @@
+/* Updating a datapoint name also updates the jsonb array entry */
+CREATE OR REPLACE FUNCTION update_triggers_datapoint_name()
+	RETURNS TRIGGER
+	LANGUAGE PLPGSQL
+	AS
+$$
+BEGIN
+UPDATE "trigger"
+	SET
+		datapoints = (datapoints - OLD.name) || jsonb_build_array(NEW.name)
+	WHERE
+		datapoints ? OLD.name;
+
+	RETURN NEW;
+END;
+$$;
+
+CREATE TRIGGER datapoint_renamed
+	AFTER UPDATE
+	ON public.datapoint
+	FOR EACH ROW
+	EXECUTE PROCEDURE update_triggers_datapoint_name();

static/js/datapoint_edit.mjs

@@ -1,5 +1,6 @@
 export class UI {
-	constructor() {
+	constructor(datapointData) {
+		this.datapoint = datapointData
 		document.addEventListener('keydown', evt=>this.keyHandler(evt))
 		document.querySelector('input[name="group"]').focus()
 	}
@@ -16,4 +17,10 @@ export class UI {
 			break
 		}
 	}
+	check_rename() {
+		let newName = document.querySelector(`input[name="name"]`).value
+		if (newName != this.datapoint.Name)
+			return confirm(`Trigger expressions needs to be manually updated when renaming a datapoint.\nDo you want to rename the datapoint?`)
+		return true
+	}
 }

views/pages/datapoint_edit.gotmpl

@@ -3,12 +3,12 @@
 
 	<script type="module" defer>
 		import {UI} from "/js/{{ .VERSION }}/datapoint_edit.mjs"
-		window._ui = new UI()
+		window._ui = new UI({{ .Data.Datapoint }})
 	</script>
 
 	{{ block "page_label" . }}{{end}}
 
-	<form id="form-trigger" action="/datapoint/update/{{ .Data.Datapoint.ID }}" method="post">
+	<form id="form-trigger" action="/datapoint/update/{{ .Data.Datapoint.ID }}" method="post" onsubmit="return _ui.check_rename()">
 		<div id="widgets" class="widgets">
 			<div class="label">Group</div>
 			<div><input type="text" name="group" value="{{ .Data.Datapoint.Group }}"></div>
@@ -46,6 +46,17 @@
 				<button id="button-update">Update</button>
 				{{ end }}
 			</div>
+
+			<div></div>
+			<div style="margin-top: 32px">
+				<b>Used in the following triggers:</b>
+				<ul>
+					{{ range .Data.Triggers }}
+					<li><a href="/trigger/edit/{{ .ID }}">{{ .Name }}</a></li>
+					{{ end }}
+				</ul>
+			</div>
+		</div>
 	</form>
 
 {{ end }}