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/authentication.ts

@@ -0,0 +1,46 @@
+import { onAuthenticatePayload } from "@hocuspocus/server";
+import { Document } from "@server/models";
+import { getUserForJWT } from "@server/utils/jwt";
+import { AuthenticationError } from "../errors";
+import policy from "../policies";
+
+const { can } = policy;
+
+export default class Authentication {
+  async onAuthenticate({
+    connection,
+    token,
+    documentName,
+  }: onAuthenticatePayload) {
+    // allows for different entity types to use this multiplayer provider later
+    const [, documentId] = documentName.split(".");
+
+    if (!token) {
+      throw AuthenticationError("Authentication required");
+    }
+
+    const user = await getUserForJWT(token);
+
+    if (user.isSuspended) {
+      throw AuthenticationError("Account suspended");
+    }
+
+    const document = await Document.findByPk(documentId, {
+      userId: user.id,
+    });
+
+    if (!can(user, "read", document)) {
+      throw AuthenticationError("Authorization required");
+    }
+
+    // set document to read only for the current user, thus changes will not be
+    // accepted and synced to other clients
+    if (!can(user, "update", document)) {
+      connection.readOnly = true;
+    }
+
+    return {
+      user,
+    };
+  }
+}