next-ucap-messenger/projects/ucap-webmessenger-app/src/app/store/messenger/event/effects.ts

import { Injectable } from '@angular/core';

import { Actions, createEffect, ofType } from '@ngrx/effects';

import { Store } from '@ngrx/store';

import { NGXLogger } from 'ngx-logger';

import { of } from 'rxjs';
import { tap, switchMap, map, catchError } from 'rxjs/operators';
import {
  InfoData,
  Info,
  InfoResponse,
  EventProtocolService,
  SSVC_TYPE_EVENT_INFO_DATA,
  SSVC_TYPE_EVENT_INFO_RES
} from '@ucap-webmessenger/protocol-event';

import * as ChatStore from '@app/store/messenger/chat';

import { info, infoSuccess, infoFailure } from './actions';
import { SessionStorageService } from '@ucap-webmessenger/web-storage';

@Injectable()
export class Effects {
  selectedRoomForInfo$ = createEffect(() =>
    this.actions$.pipe(
      ofType(ChatStore.selectedRoom),
      map(action => {
        return info({
          roomSeq: action.roomSeq,
          baseSeq: 0,
          requestCount: 50
        });
      })
    )
  );

  info$ = createEffect(
    () => {
      let infoList: Info[];

      return this.actions$.pipe(
        ofType(info),
        tap(() => {
          infoList = [];
        }),
        switchMap(req => {
          return this.eventProtocolService.info(req).pipe(
            map(res => {
              switch (res.Type) {
                case SSVC_TYPE_EVENT_INFO_DATA:
                  infoList.push(...(res as InfoData).infoList);
                  break;
                case SSVC_TYPE_EVENT_INFO_RES:
                  this.store.dispatch(
                    infoSuccess({
                      infoList,
                      res: res as InfoResponse
                    })
                  );
                  break;
              }
            }),
            catchError(error => of(infoFailure({ error })))
          );
        })
      );
    },
    { dispatch: false }
  );

  constructor(
    private actions$: Actions,
    private store: Store<any>,
    private eventProtocolService: EventProtocolService,
    private sessionStorageService: SessionStorageService,
    private logger: NGXLogger
  ) {}
}