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apollo-angular

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Use your GraphQL data in your Angular app, with the Apollo Client

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import { NetworkStatus } from '@apollo/client/core'; import { Observable, from } from 'rxjs'; import { wrapWithZone, fixObservable } from './utils'; function useInitialLoading(obsQuery) { return function useInitialLoadingOperator(source) { return new Observable(function useInitialLoadingSubscription(subscriber) { const currentResult = obsQuery.getCurrentResult(); const { loading, errors, error, partial, data } = currentResult; const { partialRefetch, fetchPolicy } = obsQuery.options; const hasError = errors || error; if (partialRefetch && partial && (!data || Object.keys(data).length === 0) && fetchPolicy !== 'cache-only' && !loading && !hasError) { subscriber.next({ ...currentResult, loading: true, networkStatus: NetworkStatus.loading, }); } return source.subscribe(subscriber); }); }; } export class QueryRef { constructor(obsQuery, ngZone, options) { this.obsQuery = obsQuery; const wrapped = wrapWithZone(from(fixObservable(this.obsQuery)), ngZone); this.valueChanges = options.useInitialLoading ? wrapped.pipe(useInitialLoading(this.obsQuery)) : wrapped; this.queryId = this.obsQuery.queryId; } // ObservableQuery's methods get options() { return this.obsQuery.options; } get variables() { return this.obsQuery.variables; } result() { return this.obsQuery.result(); } getCurrentResult() { return this.obsQuery.getCurrentResult(); } getLastResult() { return this.obsQuery.getLastResult(); } getLastError() { return this.obsQuery.getLastError(); } resetLastResults() { return this.obsQuery.resetLastResults(); } refetch(variables) { return this.obsQuery.refetch(variables); } fetchMore(fetchMoreOptions) { return this.obsQuery.fetchMore(fetchMoreOptions); } subscribeToMore(options) { // XXX: there's a bug in apollo-client typings // it should not inherit types from ObservableQuery return this.obsQuery.subscribeToMore(options); } updateQuery(mapFn) { return this.obsQuery.updateQuery(mapFn); } stopPolling() { return this.obsQuery.stopPolling(); } startPolling(pollInterval) { return this.obsQuery.startPolling(pollInterval); } setOptions(opts) { return this.obsQuery.setOptions(opts); 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QueryRef<R, V & OperationVariables>\n  : never;\n\nexport class QueryRef<T, V extends OperationVariables = EmptyObject> {\n  public valueChanges: Observable<ApolloQueryResult<T>>;\n  public queryId: ObservableQuery<T, V>['queryId'];\n\n  constructor(\n    private obsQuery: ObservableQuery<T, V>,\n    ngZone: NgZone,\n    options: WatchQueryOptions<V, T>,\n  ) {\n    const wrapped = wrapWithZone(from(fixObservable(this.obsQuery)), ngZone);\n\n    this.valueChanges = options.useInitialLoading\n      ? wrapped.pipe(useInitialLoading(this.obsQuery))\n      : wrapped;\n    this.queryId = this.obsQuery.queryId;\n  }\n\n  // ObservableQuery's methods\n\n  public get options() {\n    return this.obsQuery.options;\n  }\n\n  public get variables() {\n    return this.obsQuery.variables;\n  }\n\n  public result(): Promise<ApolloQueryResult<T>> {\n    return this.obsQuery.result();\n  }\n\n  public getCurrentResult(): ApolloQueryResult<T> {\n    return this.obsQuery.getCurrentResult();\n  }\n\n  public getLastResult(): ApolloQueryResult<T> {\n    return this.obsQuery.getLastResult();\n  }\n\n  public getLastError(): ApolloError {\n    return this.obsQuery.getLastError();\n  }\n\n  public resetLastResults(): void {\n    return this.obsQuery.resetLastResults();\n  }\n\n  public refetch(variables?: V): Promise<ApolloQueryResult<T>> {\n    return this.obsQuery.refetch(variables);\n  }\n\n  public fetchMore<K = V>(\n    fetchMoreOptions: FetchMoreQueryOptions<K, T>,\n  ): Promise<ApolloQueryResult<T>> {\n    return this.obsQuery.fetchMore(fetchMoreOptions);\n  }\n\n  public subscribeToMore<MT = any, MV = EmptyObject>(\n    options: SubscribeToMoreOptions<T, MV, MT>,\n  ): () => void {\n    // XXX: there's a bug in apollo-client typings\n    // it should not inherit types from ObservableQuery\n    return this.obsQuery.subscribeToMore(options as any);\n  }\n  public updateQuery(\n    mapFn: (previousQueryResult: T, options: UpdateQueryOptions<V>) => T,\n  ): void {\n    return this.obsQuery.updateQuery(mapFn);\n  }\n\n  public stopPolling(): void {\n    return this.obsQuery.stopPolling();\n  }\n\n  public startPolling(pollInterval: number): void {\n    return this.obsQuery.startPolling(pollInterval);\n  }\n\n  public setOptions(opts: any) {\n    return this.obsQuery.setOptions(opts);\n  }\n\n  public setVariables(variables: V) {\n    return this.obsQuery.setVariables(variables);\n  }\n}\n"]}