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48 lines
1.9 KiB
48 lines
1.9 KiB
import {HTTPKernel} from '../HTTPKernel'
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import {MountActivatedRouteHTTPModule} from './MountActivatedRouteHTTPModule'
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import {Request} from '../../lifecycle/Request'
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import {ActivatedRoute} from '../../routing/ActivatedRoute'
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import {ResponseObject} from '../../routing/Route'
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import {AbstractResolvedRouteHandlerHTTPModule} from './AbstractResolvedRouteHandlerHTTPModule'
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import {collect, isLeft, unleft, unright, withErrorContext} from '../../../util'
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/**
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* HTTP Kernel module that executes the preflight handlers for the route.
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*
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* Usually, this is the pre middleware.
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*/
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export class ExecuteResolvedRoutePreflightHTTPModule extends AbstractResolvedRouteHandlerHTTPModule {
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public static register(kernel: HTTPKernel): void {
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kernel.register(this).after(MountActivatedRouteHTTPModule)
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}
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public async apply(request: Request): Promise<Request> {
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if ( request.hasInstance(ActivatedRoute) ) {
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const route = <ActivatedRoute<unknown, unknown[]>> request.make(ActivatedRoute)
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const preflight = route.preflight
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for ( const handler of preflight ) {
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await withErrorContext(async () => {
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const result: ResponseObject = await handler(request)
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if ( typeof result !== 'undefined' ) {
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await this.applyResponseObject(result, request)
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request.response.blockingWriteback(true)
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}
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}, { handler })
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}
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const parameters = route.parameters
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const resolveResult = await collect(parameters)
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.asyncMapRight(handler => handler(request))
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if ( isLeft(resolveResult) ) {
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return unleft(resolveResult)
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}
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route.resolvedParameters = unright(resolveResult).toArray(false)
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}
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return request
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}
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}
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