adding event tracker

dashboard/server/api/metrics/[project_id]/events/metadata_fields.ts

@@ -0,0 +1,33 @@
+
+import { getUserProjectFromId } from "~/server/LIVE_DEMO_DATA";
+import { EventModel } from "@schema/metrics/EventSchema";
+import { EVENT_METADATA_FIELDS_EXPIRE_TIME, Redis } from "~/server/services/CacheService";
+
+
+export default defineEventHandler(async event => {
+
+    const project_id = getRequestProjectId(event);
+    if (!project_id) return;
+
+    const user = getRequestUser(event);
+
+    const project = await getUserProjectFromId(project_id, user);
+    if (!project) return;
+
+    const { name: eventName } = getQuery(event);
+    if (!eventName) return [];
+
+    const fields: string[] = await Redis.useCache({ key: `metadata_fields:${project_id}:${eventName}`, exp: EVENT_METADATA_FIELDS_EXPIRE_TIME }, async () => {
+        const eventsWithName = await EventModel.find({ project_id, name: eventName }, { metadata: 1 }, { limit: 10, sort: { created_at: -1 } });
+        const allMetadata = eventsWithName.map(e => e.metadata);
+        const allFields = new Set<string>();
+        for (const metadata of allMetadata) {
+            const keys = Object.keys(metadata || {});
+            keys.forEach(key => allFields.add(key));
+        }
+        return Array.from(allFields.values());
+    });
+
+    return fields;
+
+});