Type Middlewares

[UltiRequiem]

Using oak I can define a route like this

router.get("/:year", (context) => {
  context.response.body = { result: isLeapYear(context.params.year) };
});

When trying to split the code

export const PerYearMiddleware: Middleware = (context) => {
  context.response.body = { result: isLeapYear(context.params.year) };
};

I get this error

error: TS2339 [ERROR]: Property 'params' does not exist on type 'Context<Record<string, any>, Record<string, any>>'.
  context.response.body = { result: isLeapYear(context.params.year) };
                                                       ~~~~~~

If I understand correctly is because the middleware doesn't have the context that it will run on "/:year". How can I type that?

I tried with

export const PerYearMiddleware: Middleware<"/:year"> = (context) => {
 context.response.body = { result: isLeapYear(context.params.year) };
};

But it didnt work 😔

I'm splitting it so i can test it with https://oakserver.github.io/oak/testing

I already have some text written using https://github.com/cmorten/superoak
Which didn't need me to split the middlewares but oak/testing looks better

[UltiRequiem]

This would help to close UltiRequiem/leap-year-api#4 😢

[UltiRequiem]

Looks like what I was searching for is RouterMiddleware.

https://doc.deno.land/https://deno.land/x/[email protected]/mod.ts/~/RouterMiddleware