forked from hazza/dspace-angular
48 lines
2.0 KiB
TypeScript
48 lines
2.0 KiB
TypeScript
import { Observable } from 'rxjs/Observable';
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import { filter, flatMap, map, tap } from 'rxjs/operators';
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import { hasValueOperator } from '../../shared/empty.util';
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import { DSOSuccessResponse } from '../cache/response-cache.models';
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import { ResponseCacheEntry } from '../cache/response-cache.reducer';
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import { ResponseCacheService } from '../cache/response-cache.service';
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import { RemoteData } from '../data/remote-data';
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import { RestRequest } from '../data/request.models';
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import { RequestEntry } from '../data/request.reducer';
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import { RequestService } from '../data/request.service';
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/**
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* This file contains custom RxJS operators that can be used in multiple places
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*/
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export const getRequestFromSelflink = (requestService: RequestService) =>
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(source: Observable<string>): Observable<RequestEntry> =>
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source.pipe(
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flatMap((href: string) => requestService.getByHref(href)),
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hasValueOperator()
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);
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export const getResponseFromSelflink = (responseCache: ResponseCacheService) =>
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(source: Observable<string>): Observable<ResponseCacheEntry> =>
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source.pipe(
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flatMap((href: string) => responseCache.get(href)),
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hasValueOperator()
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);
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export const filterSuccessfulResponses = () =>
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(source: Observable<ResponseCacheEntry>): Observable<ResponseCacheEntry> =>
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source.pipe(filter((entry: ResponseCacheEntry) => entry.response.isSuccessful === true));
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export const getResourceLinksFromResponse = () =>
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(source: Observable<ResponseCacheEntry>): Observable<string[]> =>
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source.pipe(
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filterSuccessfulResponses(),
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map((entry: ResponseCacheEntry) => (entry.response as DSOSuccessResponse).resourceSelfLinks),
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);
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export const configureRequest = (requestService: RequestService) =>
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(source: Observable<RestRequest>): Observable<RestRequest> =>
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source.pipe(tap((request: RestRequest) => requestService.configure(request)));
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export const getRemoteDataPayload = () =>
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<T>(source: Observable<RemoteData<T>>): Observable<T> =>
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source.pipe(map((remoteData: RemoteData<T>) => remoteData.payload));
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