feat(zod-validator): pass target from zod-validator to a hook

[bartekbp]

Today, when we use zod-openapi and pass schema for body and params, we can pass a hook which is called with the result of the validation.

The function doesn't get information about the target being validated. This is problematic when we want to return custom error responses depending on the target being validated. For example, one may want to:

• return status 415 Unsupported Media Type when body parsing failed due to missing content-type. Such behaviour doesn't make sense for params
• include in the error message the place where the validation failed. For json we may write in the response body 'body validation failed', for params 'path validation failed' and for query 'search params validation failed' .

This pull request adds this functionality.

[changeset-bot]

🦋 Changeset detected

Latest commit: 7fc598c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@hono/zod-validator	Minor
@hono/zod-openapi	Patch

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[lucaschultz]

I just made the same change to the middleware. I'm so glad I double-checked and found your PR! I went a slightly different route by adding another generic to the hook (see comments), which creates a narrower type for the target passed to the hook. Would you consider including that change in your PR, @bartekbp?

[bartekbp]

Thanks for the suggestion @lucaschultz! I applied it!

[yusukebe]

LGTM!

[yusukebe]

Hi @bartekbp

Sorry for the super late reply. Looks good to me. I'll merge this and release a new version now. Thank you!