e-book

purchase-contract.effects.ts

 removeProduct$ = createEffect(
   () =>
     this.actions$.pipe(
       ofType(PurchaseContractActions.removePurchaseContract),
       map(payload => payload.key),
       switchMap(key => {

         const dialogConfig = new MatDialogConfig();
         dialogConfig.width = '420px';
         dialogConfig.disableClose = true;
         dialogConfig.autoFocus = true;
         dialogConfig.data = {
           title: 'Confirm Remove',
           content: `Are you sure to remove contract ${key} from market?`,
           output: key
         };

         const dialogRef = 
               this.dialog.open(ConfirmDialogComponent, dialogConfig);
         return dialogRef.afterClosed();
       }),
       filter(result => !!result),
       exhaustMap(result => concat(

         of(SpinnerActions.show()),
         this.fleaSrv.removePurchaseContract(result).pipe(
           tap(productKey => 
               console.log(`Contract has been removed: ${productKey}`)),
           concatMap(productKey =>
             [PurchaseContractActions.removePurchaseContractSuccess(
              { key: productKey }),
             Web3ProviderActions.getBalance()]
           ),
           catchError((err: Error) =>
             of(this.handleError(err), SpinnerActions.hide(), 
                Web3ProviderActions.getBalance())
           )
         ),
         of(SpinnerActions.hide()),
       ))

     ));