new selfhosted version

dashboard/server/api/data/event_metadata_fields.ts

@@ -0,0 +1,38 @@
+import { EventModel } from "~/shared/schema/metrics/EventSchema";
+
+
+export default defineEventHandler(async event => {
+
+    const { event_name } = getQuery(event);
+
+    if (!event_name || typeof event_name !== 'string') throw createError({ status: 400, message: 'event_name is required' });
+
+    const ctx = await getRequestContext(event, 'pid', 'domain', 'range', 'permission:webAnalytics');
+    const { project_id, domain, from, to } = ctx;
+
+  const websiteMatch = domain ? { website: domain } : {};
+
+    const aggregation = [
+        {
+            $match: {
+                project_id,
+                created_at: {
+                    $gte: new Date(from),
+                    $lte: new Date(to)
+                },
+                name: event_name,
+                ...websiteMatch,
+                $expr: { $eq: [{ $type: "$metadata" }, "object"] }
+            }
+        },
+        { $project: { metadataKeys: { $objectToArray: "$metadata" } } },
+        { $unwind: "$metadataKeys" },
+        { $group: { _id: "result", uniqueFields: { $addToSet: "$metadataKeys.k" } } }
+    ]
+
+    const events = await EventModel.aggregate(aggregation);
+
+    if (!events[0]) return [];
+    return events[0].uniqueFields as string[];
+
+});