@alauda-fe/common
Version:
Alauda frontend team common codes.
223 lines • 39.7 kB
JavaScript
/**
* @packageDocumentation
* @module k8s-resource-list
*/
import { EMPTY, Subject, merge, of, catchError, distinctUntilChanged, exhaustMap, filter, map, scan, startWith, switchMap, takeUntil, tap, finalize, ReplaySubject, } from 'rxjs';
import { WatchEvent } from '../api/types';
import { DOWNGRADE_WATCH_ENABLED, publishRef, } from '../core/public-api';
import { LoadAction, } from './types';
import { extractListParamsFromRoute, normalizeParams } from './utils';
export class K8SResourceList {
constructor({ fetcher, fetchParams$, activatedRoute, limit = 20, polling = 0, watcher, insertFn = defaultInsert, }) {
this.reloadAction$$ = new Subject();
this.loadMoreAction$$ = new Subject();
this.itemsScanner$$ = new Subject();
this.destroy$$ = new Subject();
this.bypassItems$ = new ReplaySubject(1);
this.snapshot = {};
this.insertFn = insertFn;
this.queryParams$ = (fetchParams$ ||
(activatedRoute
? extractListParamsFromRoute(activatedRoute)
: of(null))).pipe(publishRef());
const validPolling = (polling && watcher && DOWNGRADE_WATCH_ENABLED) || (polling && !watcher)
? polling
: 0;
this.loadState$ = this.buildLoadStateStream({
queryParams$: this.queryParams$,
fetcher,
limit,
polling: validPolling,
});
this.insertFn = insertFn;
this.initStreams(validPolling ? null : watcher);
}
reload(silent = false) {
this.reloadAction$$.next(silent);
}
loadMore() {
this.loadMoreAction$$.next();
}
scanItems(scanner) {
this.itemsScanner$$.next(scanner);
}
destroy() {
this.destroy$$.next();
this.destroy$$.complete();
}
create(resource) {
this.scanItems(this._create(resource));
}
update(resource) {
this.scanItems(this._update(resource));
}
delete(resource) {
if (!resource) {
return;
}
this.scanItems(this._delete(resource));
}
_create(resource) {
return (items) => {
if (!resource.metadata.name
.toLowerCase()
.includes(this.snapshot.queryParams?.keyword?.toLowerCase() ??
'')) {
return items;
}
return this.insertFn(items, resource, this.snapshot.hasMore);
};
}
_update(resource) {
return (items) => items.map(item => item.metadata.uid === resource.metadata.uid ? resource : item);
}
_delete({ metadata: { uid } }) {
return (items) => items.filter(item => item.metadata.uid !== uid);
}
buildLoadStateStream({ queryParams$, fetcher, polling, limit, }) {
const load$ = merge(queryParams$.pipe(map(queryParams => () => ({ queryParams, action: LoadAction.Reload }))), this.reloadAction$$.pipe(map(silent => (prev) => ({
...prev,
action: silent ? LoadAction.SilentReload : LoadAction.Reload,
})))).pipe(scan((acc, scanner) => scanner(acc), {}), tap(({ action, queryParams }) => {
if (action === LoadAction.Reload) {
this.snapshot = {
queryParams,
};
this.bypassItems$.next(null);
}
}));
return load$.pipe(switchMap(({ action: leadAction, queryParams }) => this.loadMoreAction$$.pipe(filter(() => this.snapshot.hasMore), map(() => true), startWith(false), exhaustMap(loadMore => {
if (this.timer) {
window.clearTimeout(this.timer);
}
const token = this.snapshot.continueToken;
const hasMore = this.snapshot.hasMore;
const currLength = this.snapshot.items?.length ?? limit;
const action = loadMore ? LoadAction.LoadMore : leadAction;
return fetcher(normalizeParams({
limit: `${action === LoadAction.SilentReload
? hasMore
? currLength
: 0
: limit}`,
continue: action === LoadAction.LoadMore ? token : '',
...queryParams,
})).pipe(map(rawResponse => ({ rawResponse, loadingError: null })), catchError((err) => of({
loadingError: action === LoadAction.SilentReload ? null : err,
})), tap(res => {
if (polling && !res.loadingError) {
this.timer = window.setTimeout(() => {
this.reload(true);
}, polling);
}
}), map(state => ({
...state,
action,
})), startWith({
action,
loading: true,
}));
}))), map(state => ({
action: LoadAction.LoadMore,
rawResponse: null,
loading: false,
loadingError: null,
...state,
})), tap(state => {
this.snapshot.rawResponse = state.rawResponse;
this.snapshot.loadingError = state.loadingError;
this.snapshot.loading =
state.loading && state.action !== LoadAction.SilentReload;
this.snapshot.continueToken = this.extractContinueTokenFromState(state);
this.snapshot.hasMore = !!this.snapshot.continueToken;
}), finalize(() => {
this.snapshot = {};
this.bypassItems$.next(null);
if (this.timer) {
window.clearTimeout(this.timer);
}
}), takeUntil(this.destroy$$), publishRef());
}
extractContinueTokenFromState({ rawResponse, loadingError, }) {
if (rawResponse) {
return rawResponse.metadata?.continue ?? '';
}
if (loadingError && 'code' in loadingError && loadingError.code === 410) {
return loadingError.metadata?.continue;
}
return this.snapshot.continueToken;
}
initStreams(watcher) {
this.rawResponse$ = this.loadState$.pipe(map(data => data.rawResponse), distinctUntilChanged(), publishRef());
this.loading$ = this.loadState$.pipe(map(({ loading, action }) => loading && action !== LoadAction.SilentReload), distinctUntilChanged(), publishRef());
this.loadingError$ = this.loadState$.pipe(map(state => state.loadingError), distinctUntilChanged(), publishRef());
this.continueToken$ = this.loadState$.pipe(filter(({ loading }) => !loading), switchMap(({ rawResponse, loadingError: err }) => {
if (rawResponse) {
return of(rawResponse.metadata?.continue ?? '');
}
if (err && 'code' in err && err.code === 410) {
return of(err.metadata?.continue);
}
return EMPTY;
}), distinctUntilChanged(), publishRef());
this.hasMore$ = this.continueToken$.pipe(map(token => !!token), distinctUntilChanged(), publishRef());
this.items$ = merge(this.loadState$.pipe(map(state => (items) => {
const newItems = state.rawResponse
? (state.rawResponse.items ?? [])
: null;
if (state.action === LoadAction.Reload) {
return newItems ?? [];
}
if (state.action === LoadAction.SilentReload) {
return newItems ?? items;
}
if (state.action === LoadAction.LoadMore) {
return newItems ? [...items, ...newItems] : items;
}
return items;
})), this.itemsScanner$$, watcher ? this.buildWatcher(watcher) : EMPTY).pipe(scan((acc, scanner) => scanner(acc), []), tap(items => {
this.snapshot.items = items;
this.bypassItems$.next(items);
}), takeUntil(this.destroy$$), publishRef());
}
buildWatcher(watcher) {
return this.rawResponse$.pipe(filter(res => !!res), distinctUntilChanged((a, b) => a.metadata?.resourceVersion === b.metadata?.resourceVersion), switchMap(list => watcher(list.metadata?.resourceVersion, this.snapshot.queryParams).pipe(catchError(() => {
this.reload(true);
return EMPTY;
}))), switchMap(({ type, object: resource }) => {
switch (type) {
case WatchEvent.Added: {
return of(this._create(resource));
}
case WatchEvent.Modified: {
return of(this._update(resource));
}
case WatchEvent.Deleted: {
return of(this._delete(resource));
}
default: {
return EMPTY;
}
}
}));
}
}
function defaultInsert(items, res, hasMore) {
for (let i = 0; i < items.length; i++) {
const compare = resourceCompare(res, items[i]);
if (compare === 0) {
return items.map((item, index) => (index === i ? res : item));
}
if (compare < 0) {
return [...items.slice(0, i), res, ...items.slice(i)];
}
}
return hasMore ? items : [...items, res];
}
function resourceCompare(a, b) {
const nsCompare = a.metadata.namespace?.localeCompare(b.metadata.namespace) ?? 0;
return nsCompare === 0
? a.metadata.name.localeCompare(b.metadata.name)
: nsCompare;
}
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* @packageDocumentation\n * @module k8s-resource-list\n */\n\nimport { HttpErrorResponse } from '@angular/common/http';\nimport {\n  EMPTY,\n  Observable,\n  Subject,\n  merge,\n  of,\n  catchError,\n  distinctUntilChanged,\n  exhaustMap,\n  filter,\n  map,\n  scan,\n  startWith,\n  switchMap,\n  takeUntil,\n  tap,\n  finalize,\n  ReplaySubject,\n} from 'rxjs';\n\nimport { WatchEvent } from '../api/types';\nimport {\n  KubernetesResource,\n  KubernetesResourceList,\n  ResourceListParams,\n  Status,\n  DOWNGRADE_WATCH_ENABLED,\n  publishRef,\n  StringMap,\n} from '../core/public-api';\n\nimport {\n  ConfigWithParams,\n  ConfigWithRoute,\n  InsertFn,\n  ItemsScanner,\n  ListParams,\n  LoadAction,\n  LoadSnapshot,\n  LoadState,\n  StreamListLoader,\n  Watcher,\n} from './types';\nimport { extractListParamsFromRoute, normalizeParams } from './utils';\n\nexport class K8SResourceList<\n  R extends KubernetesResource = KubernetesResource,\n  Q extends object = ResourceListParams,\n  P extends Q & ListParams = Q & ListParams,\n> implements StreamListLoader<KubernetesResourceList<R>, R>\n{\n  private readonly reloadAction$$ = new Subject<boolean>();\n  private readonly loadMoreAction$$ = new Subject<void>();\n  private readonly itemsScanner$$ = new Subject<ItemsScanner<R>>();\n  private readonly destroy$$ = new Subject<void>();\n  private readonly insertFn: InsertFn<R>;\n\n  loadState$: Observable<LoadState<KubernetesResourceList<R>>>;\n\n  queryParams$: Observable<Q>;\n  rawResponse$: Observable<KubernetesResourceList<R>>;\n  loading$: Observable<boolean>;\n  loadingError$: Observable<HttpErrorResponse | Status>;\n  hasMore$: Observable<boolean>;\n  continueToken$: Observable<string>;\n  items$: Observable<R[]>;\n  bypassItems$ = new ReplaySubject<R[]>(1);\n\n  timer: number;\n\n  snapshot: LoadSnapshot<KubernetesResourceList<R>, R, Q> = {};\n\n  constructor({ fetcher, activatedRoute }: ConfigWithRoute<R, Q, P>);\n  // eslint-disable-next-line @typescript-eslint/unified-signatures\n  constructor({ fetcher, fetchParams$ }: ConfigWithParams<R, Q, P>);\n  constructor({\n    fetcher,\n    fetchParams$,\n    activatedRoute,\n    limit = 20,\n    polling = 0,\n    watcher,\n    insertFn = defaultInsert,\n  }: ConfigWithRoute<R, Q, P> & ConfigWithParams<R, Q, P>) {\n    this.insertFn = insertFn;\n\n    this.queryParams$ = (\n      (fetchParams$ ||\n        (activatedRoute\n          ? extractListParamsFromRoute(activatedRoute)\n          : of(null))) as Observable<Q>\n    ).pipe(publishRef());\n\n    const validPolling =\n      (polling && watcher && DOWNGRADE_WATCH_ENABLED) || (polling && !watcher)\n        ? polling\n        : 0;\n\n    this.loadState$ = this.buildLoadStateStream({\n      queryParams$: this.queryParams$,\n      fetcher,\n      limit,\n      polling: validPolling,\n    });\n\n    this.insertFn = insertFn;\n\n    this.initStreams(validPolling ? null : watcher);\n  }\n\n  reload(silent = false) {\n    this.reloadAction$$.next(silent);\n  }\n\n  loadMore() {\n    this.loadMoreAction$$.next();\n  }\n\n  scanItems(scanner: ItemsScanner<R>) {\n    this.itemsScanner$$.next(scanner);\n  }\n\n  destroy() {\n    this.destroy$$.next();\n    this.destroy$$.complete();\n  }\n\n  create(resource: R) {\n    this.scanItems(this._create(resource));\n  }\n\n  update(resource: R) {\n    this.scanItems(this._update(resource));\n  }\n\n  delete(resource?: R) {\n    if (!resource) {\n      return;\n    }\n    this.scanItems(this._delete(resource));\n  }\n\n  private _create(resource: R) {\n    return (items: R[]) => {\n      if (\n        !resource.metadata.name\n          .toLowerCase()\n          .includes(\n            (this.snapshot.queryParams as StringMap)?.keyword?.toLowerCase() ??\n              '',\n          )\n      ) {\n        return items;\n      }\n      return this.insertFn(items, resource, this.snapshot.hasMore);\n    };\n  }\n\n  private _update(resource: R) {\n    return (items: R[]) =>\n      items.map(item =>\n        item.metadata.uid === resource.metadata.uid ? resource : item,\n      );\n  }\n\n  private _delete({ metadata: { uid } }: R) {\n    return (items: R[]) => items.filter(item => item.metadata.uid !== uid);\n  }\n\n  private buildLoadStateStream({\n    queryParams$,\n    fetcher,\n    polling,\n    limit,\n  }: {\n    queryParams$: Observable<Q>;\n    fetcher: (p: P) => Observable<KubernetesResourceList<R>>;\n    polling: number;\n    limit: number;\n  }) {\n    const load$ = merge(\n      queryParams$.pipe(\n        map(queryParams => () => ({ queryParams, action: LoadAction.Reload })),\n      ),\n      this.reloadAction$$.pipe(\n        map(silent => (prev: { queryParams?: P; action?: LoadAction }) => ({\n          ...prev,\n          action: silent ? LoadAction.SilentReload : LoadAction.Reload,\n        })),\n      ),\n    ).pipe(\n      scan(\n        (acc, scanner) => scanner(acc),\n        {} as { queryParams?: P; action?: LoadAction },\n      ),\n      tap(({ action, queryParams }) => {\n        if (action === LoadAction.Reload) {\n          this.snapshot = {\n            queryParams,\n          };\n          this.bypassItems$.next(null);\n        }\n      }),\n    );\n\n    return load$.pipe(\n      switchMap(({ action: leadAction, queryParams }) =>\n        this.loadMoreAction$$.pipe(\n          filter(() => this.snapshot.hasMore),\n          map(() => true),\n          startWith(false),\n          exhaustMap(loadMore => {\n            if (this.timer) {\n              window.clearTimeout(this.timer);\n            }\n            const token = this.snapshot.continueToken;\n            const hasMore = this.snapshot.hasMore;\n            const currLength = this.snapshot.items?.length ?? limit;\n            const action = loadMore ? LoadAction.LoadMore : leadAction;\n            return fetcher(\n              normalizeParams({\n                limit: `${\n                  action === LoadAction.SilentReload\n                    ? hasMore\n                      ? currLength\n                      : 0\n                    : limit\n                }`,\n                continue: action === LoadAction.LoadMore ? token : '',\n                ...queryParams,\n              }) as P,\n            ).pipe(\n              map(rawResponse => ({ rawResponse, loadingError: null })),\n              catchError((err: Status | HttpErrorResponse) =>\n                of({\n                  loadingError: action === LoadAction.SilentReload ? null : err,\n                }),\n              ),\n              tap(res => {\n                if (polling && !res.loadingError) {\n                  this.timer = window.setTimeout(() => {\n                    this.reload(true);\n                  }, polling);\n                }\n              }),\n              map(state => ({\n                ...state,\n                action,\n              })),\n              startWith({\n                action,\n                loading: true,\n              }),\n            );\n          }),\n        ),\n      ),\n      map(state => ({\n        action: LoadAction.LoadMore,\n        rawResponse: null,\n        loading: false,\n        loadingError: null,\n        ...state,\n      })),\n      tap(state => {\n        this.snapshot.rawResponse = state.rawResponse;\n        this.snapshot.loadingError = state.loadingError;\n        this.snapshot.loading =\n          state.loading && state.action !== LoadAction.SilentReload;\n        this.snapshot.continueToken = this.extractContinueTokenFromState(state);\n        this.snapshot.hasMore = !!this.snapshot.continueToken;\n      }),\n      finalize(() => {\n        this.snapshot = {};\n        this.bypassItems$.next(null);\n        if (this.timer) {\n          window.clearTimeout(this.timer);\n        }\n      }),\n      takeUntil(this.destroy$$),\n      publishRef(),\n    );\n  }\n\n  private extractContinueTokenFromState({\n    rawResponse,\n    loadingError,\n  }: LoadState<KubernetesResourceList<R>>) {\n    if (rawResponse) {\n      return rawResponse.metadata?.continue ?? '';\n    }\n\n    if (loadingError && 'code' in loadingError && loadingError.code === 410) {\n      return loadingError.metadata?.continue;\n    }\n\n    return this.snapshot.continueToken;\n  }\n\n  private initStreams(watcher: Watcher<R, Q>) {\n    this.rawResponse$ = this.loadState$.pipe(\n      map(data => data.rawResponse),\n      distinctUntilChanged(),\n      publishRef(),\n    );\n\n    this.loading$ = this.loadState$.pipe(\n      map(\n        ({ loading, action }) => loading && action !== LoadAction.SilentReload,\n      ),\n      distinctUntilChanged(),\n      publishRef(),\n    );\n\n    this.loadingError$ = this.loadState$.pipe(\n      map(state => state.loadingError),\n      distinctUntilChanged(),\n      publishRef(),\n    );\n\n    this.continueToken$ = this.loadState$.pipe(\n      filter(({ loading }) => !loading),\n      switchMap(({ rawResponse, loadingError: err }) => {\n        if (rawResponse) {\n          return of(rawResponse.metadata?.continue ?? '');\n        }\n        if (err && 'code' in err && err.code === 410) {\n          return of(err.metadata?.continue);\n        }\n        return EMPTY;\n      }),\n      distinctUntilChanged(),\n      publishRef(),\n    );\n\n    this.hasMore$ = this.continueToken$.pipe(\n      map(token => !!token),\n      distinctUntilChanged(),\n      publishRef(),\n    );\n\n    this.items$ = merge(\n      this.loadState$.pipe(\n        map(state => (items: R[]) => {\n          const newItems = state.rawResponse\n            ? (state.rawResponse.items ?? [])\n            : null;\n          if (state.action === LoadAction.Reload) {\n            return newItems ?? [];\n          }\n          if (state.action === LoadAction.SilentReload) {\n            return newItems ?? items;\n          }\n          if (state.action === LoadAction.LoadMore) {\n            return newItems ? [...items, ...newItems] : items;\n          }\n          return items;\n        }),\n      ),\n      this.itemsScanner$$,\n      watcher ? this.buildWatcher(watcher) : EMPTY,\n    ).pipe(\n      scan<ItemsScanner<R>, R[]>((acc, scanner) => scanner(acc), []),\n      tap(items => {\n        this.snapshot.items = items;\n        this.bypassItems$.next(items);\n      }),\n      takeUntil(this.destroy$$),\n      publishRef(),\n    );\n  }\n\n  private buildWatcher(watcher: Watcher<R, Q>) {\n    return this.rawResponse$.pipe(\n      filter(res => !!res),\n      distinctUntilChanged(\n        (a, b) => a.metadata?.resourceVersion === b.metadata?.resourceVersion,\n      ),\n      switchMap(list =>\n        watcher(list.metadata?.resourceVersion, this.snapshot.queryParams).pipe(\n          catchError(() => {\n            this.reload(true);\n            return EMPTY;\n          }),\n        ),\n      ),\n      switchMap(({ type, object: resource }) => {\n        switch (type) {\n          case WatchEvent.Added: {\n            return of(this._create(resource));\n          }\n          case WatchEvent.Modified: {\n            return of(this._update(resource));\n          }\n          case WatchEvent.Deleted: {\n            return of(this._delete(resource));\n          }\n          default: {\n            return EMPTY;\n          }\n        }\n      }),\n    );\n  }\n}\n\nfunction defaultInsert<T extends KubernetesResource>(\n  items: T[],\n  res: T,\n  hasMore: boolean,\n) {\n  for (let i = 0; i < items.length; i++) {\n    const compare = resourceCompare(res, items[i]);\n    if (compare === 0) {\n      return items.map((item, index) => (index === i ? res : item));\n    }\n    if (compare < 0) {\n      return [...items.slice(0, i), res, ...items.slice(i)];\n    }\n  }\n\n  return hasMore ? items : [...items, res];\n}\n\nfunction resourceCompare(a: KubernetesResource, b: KubernetesResource) {\n  const nsCompare =\n    a.metadata.namespace?.localeCompare(b.metadata.namespace) ?? 0;\n  return nsCompare === 0\n    ? a.metadata.name.localeCompare(b.metadata.name)\n    : nsCompare;\n}\n"]}