chore: Move to Typescript (#2783)

This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.

closes #1282

server/collaboration/tracing.ts

@@ -0,0 +1,60 @@
+import {
+  onChangePayload,
+  onConnectPayload,
+  onDisconnectPayload,
+  onLoadDocumentPayload,
+} from "@hocuspocus/server";
+import Metrics from "@server/logging/metrics";
+
+export default class Tracing {
+  onLoadDocument({ documentName, instance }: onLoadDocumentPayload) {
+    Metrics.increment("collaboration.load_document", {
+      documentName,
+    });
+    Metrics.gaugePerInstance(
+      "collaboration.documents_count",
+      instance.getDocumentsCount()
+    );
+  }
+
+  onAuthenticationFailed({ documentName }: { documentName: string }) {
+    Metrics.increment("collaboration.authentication_failed", {
+      documentName,
+    });
+  }
+
+  onConnect({ documentName, instance }: onConnectPayload) {
+    Metrics.increment("collaboration.connect", {
+      documentName,
+    });
+    Metrics.gaugePerInstance(
+      "collaboration.connections_count",
+      instance.getConnectionsCount()
+    );
+  }
+
+  onDisconnect({ documentName, instance }: onDisconnectPayload) {
+    Metrics.increment("collaboration.disconnect", {
+      documentName,
+    });
+    Metrics.gaugePerInstance(
+      "collaboration.connections_count",
+      instance.getConnectionsCount()
+    );
+    Metrics.gaugePerInstance(
+      "collaboration.documents_count", // -1 adjustment because hook is called before document is removed
+      instance.getDocumentsCount() - 1
+    );
+  }
+
+  onChange({ documentName }: onChangePayload) {
+    Metrics.increment("collaboration.change", {
+      documentName,
+    });
+  }
+
+  onDestroy() {
+    Metrics.gaugePerInstance("collaboration.connections_count", 0);
+    Metrics.gaugePerInstance("collaboration.documents_count", 0);
+  }
+}