blee/strfry-policies
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Tweak types a little

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Alex Gleason 2023-03-24 20:23:38 -05:00
parent 5a6af74413
commit 6e342b9667
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1 changed files with 2 additions and 5 deletions
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src/pipeline.ts
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@ -6,15 +6,12 @@ type PolicyTuple<Opts = unknown> = [policy: Policy<Opts>, opts?: Opts];
/** Helper type for proper type inference of PolicyTuples in the pipeline. */ /** Helper type for proper type inference of PolicyTuples in the pipeline. */
// https://stackoverflow.com/a/75806165 // https://stackoverflow.com/a/75806165
// https://stackoverflow.com/a/54608401 // https://stackoverflow.com/a/54608401
type PolicyTuplesRest<T extends PolicyTuple[]> = { type PolicySpread<T extends any[]> = {
[K in keyof T]: PolicyTuple<T[K]> | Policy<T[K]>; [K in keyof T]: PolicyTuple<T[K]> | Policy<T[K]>;
}; };
/** Processes messages through multiple policies, bailing early on rejection. */ /** Processes messages through multiple policies, bailing early on rejection. */
async function pipeline<P extends any[]>( async function pipeline<T extends any[]>(msg: InputMessage, policies: [...PolicySpread<T>]): Promise<OutputMessage> {
msg: InputMessage,
policies: [...PolicyTuplesRest<P>],
): Promise<OutputMessage> {
for (const item of policies) { for (const item of policies) {
const [policy, opts] = toTuple(item); const [policy, opts] = toTuple(item);
const result = await policy(msg, opts); const result = await policy(msg, opts);