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api-fetch: Type several of the middlewares #29719

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merged 6 commits into from
Mar 16, 2021

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sarayourfriend
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@sarayourfriend sarayourfriend commented Mar 10, 2021

Description

Adds type checking to the following middleware:

  • namespace-endpoint
  • preloading
  • root-url
  • user-locale

It also simplifies the types used in the nonce middleware.

It also corrects the return types for the ApiFetchMiddleware and its next function. These eventually always return a Promise as the final middleware eventually calls to the default handler. Each middleware itself can also return a Promise instead of calling next (see preloading and media-upload).

Part of #18838

How has this been tested?

Type check passes. No runtime changes except converting some functions to arrow functions so that we can type them as ApiFetchMiddleware instead of having to annotate the parameter types manually (see the changes to the nonce middleware for an example of this).

Types of changes

Non-breaking changes.

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • [N/A] My code follows the accessibility standards.
  • [N/A] I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR.

@sarayourfriend sarayourfriend force-pushed the add/types-api-fetch-namespace branch from 61bf58f to ea308f8 Compare March 15, 2021 14:29
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Size Change: -1 B (0%)

Total Size: 1.4 MB

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Looks good, thank you 👍

* @param {import('../types').ApiFetchRequestProps} options
* @param {(options: import('../types').ApiFetchRequestProps) => import('../types').ApiFetchRequestProps} next
* @return {import('../types').ApiFetchRequestProps} The enhanced request.
* @type {import('../types').ApiFetchMiddleware & { nonce: string }}
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I guess we could do a bit better with typing the { nonce: string } part.

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What would you suggest? This is the only way I know how to type a function with extra properties on it other than using a new interface:

interface ApiFetchNonceMiddleware extends ApiFetchMiddleware {
    nonce: string;
}

but that's effectively the same as what I have inline here.

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I agree, that's not much better 👍 Let's keep as-is for now

@sarayourfriend sarayourfriend merged commit 32d2047 into trunk Mar 16, 2021
@sarayourfriend sarayourfriend deleted the add/types-api-fetch-namespace branch March 16, 2021 14:17
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Thanks for the review @tyxla!

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