One way to enhance the functionality of the hapi module by adding type checking for server methods is shown in the following code snippet:
import { Server } from 'hapi';
declare module 'hapi' {
export interface Server {
methods: {
getUsername: () => Promise<string>;
};
}
}
However, this approach may not work as expected since the @types/hapi package already defines methods differently:
readonly methods: Util.Dictionary<ServerMethod>;
A question was raised on StackOverflow regarding this issue, as seen here, suggesting it might not be possible to redefine an existing property. Without clear documentation, the user seeks guidance on how to augment or fix the type information.
To address this limitation, a workaround involves creating a new Hapi.js Server interface that extends the original interface. Here's an example showing this workaround:
// src/augment.d.ts
import { Server as HapiServer } from 'hapi';
export interface Server extends HapiServer {
methods: {
getUsername: () => Promise<string>;
};
}
// In my file src/server.ts file
import { Server } from 'src/augment';
// NOW IT TYPECHECKS CORRECTLY
const username = server.methods.getUsername();
Considering this approach, is it the most appropriate solution to this type-checking dilemma?