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Added compose pipe function to handle pipable type errors #92

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Added compose pipe function to handle pipable type errors #92

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21 changes: 21 additions & 0 deletions src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,8 @@ import {
} from './lifecycle-functions';
import {
AllStageKeys,
HasAllNotRequireds,
HasAllRequireds,
HasAttachData,
HasDoWork,
HasFinalAuthorize,
Expand Down Expand Up @@ -1393,6 +1395,25 @@ export function HTPipe(...objs: any[]) {
return objs.reduce((prev: any, curr: any) => HTPipe(prev, curr), {});
}

/**
* A pipeable object is any object that has one or more lifecycle stage functions.
* This type represents the union of all possible stage configurations.
*/
type Pipeable = OptionallyHasInitPreContext<any, any> &
OptionallyHasSanitizeParams<any, any> &
OptionallyHasSanitizeQueryParams<any, any> &
OptionallyHasSanitizeBody<any, any> &
MightHavePreAuthorize<any, any> &
OptionallyHasAttachData<any, any> &
MightHaveFinalAuthorize<any, any> &
OptionallyHasDoWork<any, any> &
MightHaveRespond<any, any> &
MightHaveSanitizeResponse<any, any>;

export function composePipes(...pipes: Pipeable[]): HasAllNotRequireds & HasAllRequireds {
return pipes.reduce((prev, curr) => HTPipe(prev, curr), {} as Pipeable) as HasAllNotRequireds & HasAllRequireds;
}

// left has attachData AND right has attachData AND left's return keys that exist in right's parameters are assignable to right's correspondingly
export function HTPipeAttachData<
TLeft extends HasAttachData<
Expand Down