snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

packages/apps/base-runtime/src/lib/ast/mod.ts

@@ -0,0 +1,69 @@
+import type { Node, AnyNode } from 'acorn';
+import { parse } from 'acorn';
+import { fullAncestor } from 'acorn-walk';
+import { generate } from 'astring';
+
+import * as operations from './operations';
+import type { WalkerState } from './operations';
+
+function fixAst(ast: Node): boolean {
+	const pendingOperations = [
+		operations.fixLivechatIsOnlineCalls,
+		operations.checkReassignmentOfModifiedIdentifiers,
+		operations.fixRoomUsernamesCalls,
+	];
+
+	// Have we touched the tree?
+	let isModified = false;
+
+	while (pendingOperations.length) {
+		const ops = pendingOperations.splice(0);
+		const state: WalkerState = {
+			isModified: false,
+			functionIdentifiers: new Set<string>(),
+		};
+
+		fullAncestor(
+			ast,
+			(node, state, ancestors, type) => {
+				ops.forEach((operation) => operation(node as AnyNode, state as WalkerState, ancestors as AnyNode[], type));
+			},
+			undefined,
+			state,
+		);
+
+		if (state.isModified) {
+			isModified = true;
+		}
+
+		if (state.functionIdentifiers.size) {
+			pendingOperations.push(
+				operations.buildFixModifiedFunctionsOperation(state.functionIdentifiers),
+				operations.checkReassignmentOfModifiedIdentifiers,
+			);
+		}
+	}
+
+	return isModified;
+}
+
+export function fixBrokenSynchronousAPICalls(appSource: string): string {
+	const astRootNode = parse(appSource, {
+		// Latest ecma version supported by this version of acorn.
+		ecmaVersion: 'latest',
+		// Allow everything, we don't want to complain if code is badly written
+		// Also, since the code itself has been transpiled, the chance of getting
+		// shenanigans is lower
+		allowReserved: true,
+		allowReturnOutsideFunction: true,
+		allowImportExportEverywhere: true,
+		allowAwaitOutsideFunction: true,
+		allowSuperOutsideMethod: true,
+	});
+
+	if (fixAst(astRootNode)) {
+		return generate(astRootNode);
+	}
+
+	return appSource;
+}