getProductsInfo(daylyDate: Date, fromDate: Date, toDate: Date): Observable < ProductInfo[] > {
    return this.getProductsLeftovers(fromDate)
      .map(restOvers => new Map(restOvers.map(x => [x.productTypeId, x] as[number, ProductLeftoverResponse])))
      .flatMap(restOversMap => this.getDaylyBatches(daylyDate)
        .map(dayBatches => new Map(dayBatches.map(x => [x.productTypeId, x] as[number, ProductBatchResponse])))
        .flatMap(dayBatchesMap => this.getMonthlyBatches(fromDate, toDate)
          .map(monthBatches => new Map(monthBatches.map(x => [x.productTypeId, x] as[number, ProductBatchResponse])))
          .flatMap(monthBatchesMap => this.getProductsLeftovers(toDate)
            .map(currentOvers => new Map(currentOvers.map(x => [x.productTypeId, x] as[number, ProductLeftoverResponse])))
            .flatMap(currentOversMap => this.getProductsChecks()
              .map(checks => new Map(checks.map(x => [x.productTypeId, x] as[number, ProductCheckResponse])))
              .flatMap(checksMap => this.getProductTypes()
                .flatMap(types => from(types)
                  .map(type => {
                    const info: ProductInfo = {
                      type,
                      restLeftover: restOversMap.get(type.id) || <ProductLeftoverResponse>{},
                      dayBatch: dayBatchesMap.get(type.id) || <ProductBatchResponse>{},
                      monthBatch: monthBatchesMap.get(type.id) || <ProductBatchResponse>{},
                      currentLeftover: currentOversMap.get(type.id) || <ProductLeftoverResponse>{},
                      productCheck: checksMap.get(type.id) || <ProductCheckResponse>{}
                    }
                    return info;
                  }))))))).toArray();
  }