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63945: Bitstream pagination and removal of listing per bundle

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This commit is contained in:
Kristof De Langhe
2019-07-26 17:33:06 +02:00
parent 27ec828142
commit 4f8fe9e611
6 changed files with 109 additions and 108 deletions
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44
src/app/core/shared/item-bitstreams-utils.ts
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@@ -3,48 +3,14 @@ import { RemoteData } from '../data/remote-data';
import { PaginatedList } from '../data/paginated-list';
import { Bitstream } from './bitstream.model';
import { map } from 'rxjs/operators';
import { combineLatest as observableCombineLatest } from 'rxjs';
import { getSucceededRemoteData } from './operators';
import { hasValueOperator } from '../../shared/empty.util';
/**
* Operator for turning the current page of bitstreams into an array
*/
export const toBitstreamsArray = () =>
(source: Observable<RemoteData<PaginatedList<Bitstream>>>): Observable<Bitstream[]> =>
source.pipe(
getSucceededRemoteData(),
hasValueOperator(),
map((bitstreamRD: RemoteData<PaginatedList<Bitstream>>) => bitstreamRD.payload.page)
);
export const getBundleNames = () =>
(source: Observable<RemoteData<PaginatedList<Bitstream>>>): Observable<string[]> =>
source.pipe(
toBitstreamsArray(),
map((bitstreams: Bitstream[]) => {
const result = [];
bitstreams.forEach((bitstream: Bitstream) => {
if (result.indexOf(bitstream.bundleName) < 0) {
result.push(bitstream.bundleName);
}
});
return result;
})
);
export const filterByBundleName = (bundleName: string) =>
(source: Observable<RemoteData<PaginatedList<Bitstream>>>): Observable<Bitstream[]> =>
source.pipe(
toBitstreamsArray(),
map((bitstreams: Bitstream[]) =>
bitstreams.filter((bitstream: Bitstream) => bitstream.bundleName === bundleName)
)
);
export const toBundleMap = () =>
(source: Observable<RemoteData<PaginatedList<Bitstream>>>): Observable<Map<string, Bitstream[]>> =>
observableCombineLatest(source.pipe(toBitstreamsArray()), source.pipe(getBundleNames())).pipe(
map(([bitstreams, bundleNames]) => {
const bundleMap = new Map();
bundleNames.forEach((bundleName: string) => {
bundleMap.set(bundleName, bitstreams.filter((bitstream: Bitstream) => bitstream.bundleName === bundleName));
});
return bundleMap;
})
);