[6d639c9] | 1 | import { HttpErrorResponse } from '@angular/common/http';
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| 2 | import { Injectable } from '@angular/core';
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| 3 | import { Action, Store } from '@ngrx/store';
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| 4 | import { Observable, throwError } from 'rxjs';
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| 5 | import { catchError, filter, map } from 'rxjs/operators';
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| 6 |
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| 7 | import { QuestionStateViewModel } from 'src/app/shared-app/models';
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| 8 | import { EffectStartedWorking, GetQuestionState } from './question-state/question.actions';
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| 9 | import { questionStateQuery } from './question-state/question.selectors';
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| 10 | import { QuestionState } from './question-state/question.state';
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| 11 |
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| 12 | @Injectable({
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| 13 | providedIn: 'root'
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| 14 | })
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| 15 | export class QuestionFacadeService {
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| 16 | effectWorking$: Observable<boolean | HttpErrorResponse>;
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| 17 |
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| 18 | constructor(private store: Store<QuestionState>) {
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| 19 | this.effectWorking$ = this.store.select(questionStateQuery.effectWorking).pipe(
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| 20 | filter((effect) => effect !== null),
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| 21 | map((effect) => {
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| 22 | if (effect instanceof HttpErrorResponse) {
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| 23 | throw effect;
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| 24 | } else {
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| 25 | return effect;
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| 26 | }
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| 27 | }),
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| 28 | catchError((err) => {
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| 29 | return throwError(err);
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| 30 | })
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| 31 | );
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| 32 | }
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| 33 |
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[dab7a9b] | 34 | public getQuestion(): Observable<QuestionStateViewModel> {
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| 35 | return this.store
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| 36 | .select(questionStateQuery.getQuestion)
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| 37 | .pipe(filter((x: QuestionStateViewModel | null): x is QuestionStateViewModel => x !== null));
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| 38 | }
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| 39 |
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[6d639c9] | 40 | public fetchQuestion(questionUid: string): void {
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| 41 | this.dispatchEffect(new GetQuestionState(questionUid));
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| 42 | }
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| 43 |
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| 44 | private dispatch(action: Action): void {
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| 45 | this.store.dispatch(action);
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| 46 | }
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| 47 |
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| 48 | private dispatchEffect(action: Action): void {
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| 49 | this.dispatch(new EffectStartedWorking());
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| 50 | this.dispatch(action);
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| 51 | }
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| 52 | }
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