Comments (9)
Yes that is correct. Currently there is no notion of an async sanitizer in the library, but a PR would be greatly appreciated. In the meantime all you really need to do is await the result of asCertificate
and then unwrap it like so: https://github.com/EthWorks/restless/blob/master/sanitizers/src/cast.ts#L11-L16
from restless.
I'm ok to make a PR. Would that be fine to add an asyncCast
function that takes a Promise<Sanitizer<T>>
as input and returns Promise<T>
?
from restless.
That could also work, but it does not cover your use case. Your use case is a sanitizer that returns a promise, not a promise with a sanitizer.
from restless.
Hey @getlarge. I thought about your issue over the weekend and here is what I came up with:
import { Result, SanitizerFailure, CastError } from "@restless/sanitizers";
export type AsyncSanitizer<T> = (value: unknown, path: string) => Promise<Result<SanitizerFailure[], T>>
export async function asyncCast<T>(value: unknown, sanitizer: AsyncSanitizer<T>, message?: string): Promise<T> {
const result = await sanitizer(value, '')
if (Result.isOk(result)) {
return result.ok
} else {
throw new CastError(result.error, message)
}
}
You should be able to drop this code in your project and use it without issues.
If however you wanted a function that takes a Promise<Sanitizer<T>
it becomes even easier:
import { Sanitizer, cast } from "@restless/sanitizers";
export async function asyncCast<T>(value: unknown, sanitizer: Promise<Sanitizer<T>>, message?: string): Promise<T> {
return cast(value, await sanitizer, message)
}
from restless.
Hey @sz-piotr, sorry for the delay. You were right, the use case is a sanitizer that returns a promise.
Thanks a lot for your snippet and your feedback.
Do you intend to add the AsyncSanitizer type and asyncCast function in restless ?
from restless.
In fact my question was more to know if you would prefer a cast
function that could take an async | sync sanitizer as 2nd argument or to separate async and sync sanitizer with another function and type.
from restless.
Here is my line of thinking. If async sanitizers were to be supported by default by the library this should be a bigger change, where all the other higher-order sanitizers like asArray
would take either a sync or async sanitizer. In this scenario it makes sense that cast
serves a dual purpose being sync or async depending on what it receives.
However since there are currently no async sanitizers in the library code I believe keeping the asyncCast
function as separate from both the cast
and the library itself makes sense.
from restless.
But since a user can create an async sanitizer maybe we can add an example or test to illustrate that case ?
from restless.
Hmm might be indeed useful once we have the notion of AsyncSanitizers somewhere in the library. If in the future we add this it will definitely be described in the readme.
from restless.
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from restless.