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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | 458x 458x 458x 458x 458x 77x 77x 31x 19x 458x 938x 938x 330x 1x 329x 329x 458x 3509x 458x 2222x 458x 3131x 3131x 519x 458x 3182x 458x 151x 458x 1x 1x 1x 458x 319x 319x 458x 135x 135x 103x | import { ofType } from '@ngrx/effects';
import { Action, ActionCreator } from '@ngrx/store';
import { isEqual } from 'lodash-es';
import {
MonoTypeOperatorFunction,
NEVER,
Observable,
OperatorFunction,
combineLatest,
concat,
connect,
of,
throwError,
} from 'rxjs';
import { buffer, catchError, distinctUntilChanged, filter, map, mergeAll, take, withLatestFrom } from 'rxjs/operators';
import { HttpError } from 'ish-core/models/http-error/http-error.model';
/**
* compare the current stream with the latest value from given observable distinctively and fire only when value is different than the observable value and the last fired value
*/
export function distinctCompareWith<T>(observable: Observable<T>): OperatorFunction<T, T> {
return (source$: Observable<T>) =>
source$.pipe(
withLatestFrom(observable),
filter(([newVal, oldVal]) => newVal !== oldVal),
map(([newVal]) => newVal),
distinctUntilChanged()
);
}
export function mapErrorToAction<S, T>(actionType: (props: { error: HttpError }) => T, extras?: object) {
return (source$: Observable<S | T>) =>
source$.pipe(
catchError((error: HttpError) => {
if (error.name !== 'HttpErrorResponse') {
// rethrow runtime errors
return throwError(() => error);
}
const errorAction = actionType({ error, ...extras });
return of(errorAction);
})
);
}
export function mapToProperty<T, K extends keyof T>(property: K) {
return (source$: Observable<T>) => source$.pipe<T[K]>(map(x => (x ? x[property] : undefined)));
}
export function mapToPayload<T>(): OperatorFunction<{ payload: T } & Action, T> {
return (source$: Observable<{ payload: T }>) => source$.pipe(map(action => action.payload));
}
export function mapToPayloadProperty<T, K extends keyof T>(key: K): OperatorFunction<{ payload: T } & Action, T[K]> {
return (source$: Observable<{ payload: T }>) =>
source$.pipe(
map(action => action.payload),
mapToProperty(key)
);
}
export function whenTruthy<T>(): MonoTypeOperatorFunction<T> {
return (source$: Observable<T>) => source$.pipe(filter(x => !!x));
}
export function whenFalsy<T>(): MonoTypeOperatorFunction<T> {
return (source$: Observable<T>) => source$.pipe(filter(x => !x));
}
/**
* Stream will fire only emissions when the current value T of the source$ stream provides the value V for property T[K]
*/
export function whenPropertyHasValue<T, K extends keyof T, V>(property: K, value: V) {
return (source$: Observable<T>) =>
source$.pipe(
whenTruthy(),
filter(x => !!x[property] && isEqual(x[property], value))
);
}
/**
* Operator that maps to an observable when the stream contains the specified action.
* Uses combineLatest so it will emit after both the action is fired and the observable emits.
*
* @param observable$ the observable that will be mapped to
* @param action the action to listen for
* @returns a stream containing only the values of the provided observable
*/
export function useCombinedObservableOnAction<T>(
observable$: Observable<T>,
action: ActionCreator
): OperatorFunction<Action, T> {
return (source$: Observable<Action>) =>
combineLatest([observable$, source$.pipe(ofType(action))]).pipe(map(([obs, _]) => obs));
}
/**
* Delays emissions until the notifier emits.
* Taken from https://ncjamieson.com/how-to-write-delayuntil/
*
* @param notifier the observable that will be waited for
* @returns an observable that starts emitting only after the notifier emits
*/
export function delayUntil<T>(notifier: Observable<unknown>): OperatorFunction<T, T> {
return source =>
source.pipe(
connect(connected => concat(concat(connected, NEVER).pipe(buffer(notifier), take(1), mergeAll()), connected))
);
}
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