rxjs/operators#concatWith TypeScript Examples

The following examples show how to use rxjs/operators#concatWith. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: CollateralAuctionsTask.ts    From guardian with Apache License 2.0 5 votes vote down vote up 
async start(guardian: AcalaGuardian) {
    const { apiRx } = await guardian.isReady();

    const { account, currencyId } = this.arguments;

    let currencies: CurrencyId[] = [];
    const whitelist = apiRx.consts.cdpEngine.collateralCurrencyIds;

    // make sure provided currency id is whitelisted
    if (currencyId !== 'all') {
      currencies = castArray(currencyId).map((x) => apiRx.createType('CurrencyId', x));
      currencies.forEach((id) => {
        if (!whitelist.find((x) => x.eq(id))) throw Error('Collateral currency id not allowed!');
      });
    } else {
      currencies = whitelist;
    }

    const includesAccount = includesArgument<string>(account);
    const includesCurrency = includesArgument<CurrencyId>(currencies);

    const upcomingAuctions$ = apiRx.query.auction.auctionsIndex().pipe(
      pairwise(),
      filter(([, next]) => !next.isZero()),
      switchMap(([prev, next]) => range(prev.toNumber(), next.toNumber())),
      distinctUntilChanged(),
      mergeMap((auctionId) => {
        return combineLatest([
          of(auctionId),
          apiRx.query.auctionManager.collateralAuctions(auctionId),
          apiRx.query.auction.auctions(auctionId)
        ]);
      })
    );

    return apiRx.query.auctionManager.collateralAuctions.entries().pipe(
      mergeMap((entry) => entry),
      mergeMap((entry) => {
        const [storageKey, maybecollateralAuction] = entry;
        const [auctionId] = storageKey.args;
        return combineLatest([of(auctionId), of(maybecollateralAuction), apiRx.query.auction.auctions(auctionId)]);
      }),
      concatWith(upcomingAuctions$),
      filter(([, maybecollateralAuction, maybeAuction]) => {
        if (maybecollateralAuction.isNone) return false;
        if (maybeAuction.isNone) return false;

        const { refundRecipient, currencyId } = maybecollateralAuction.unwrap();

        if (!includesAccount(refundRecipient.toString())) return false;
        if (!includesCurrency(currencyId)) return false;

        return true;
      }),
      map(([auctionId, maybecollateralAuction, maybeAuction]) => {
        const collateralAuction = maybecollateralAuction.unwrap();
        const auction = maybeAuction.unwrap();

        const [lastBidder, lastBid] = auction.bid.isSome ? auction.bid.unwrap() : [];

        return {
          account: collateralAuction.refundRecipient.toString(),
          currencyId: collateralAuction.currencyId.asToken.toString(),
          auctionId: Number(auctionId.toString()),
          initialAmount: collateralAuction.initialAmount.toString(),
          amount: collateralAuction.amount.toString(),
          target: collateralAuction.target.toString(),
          startTime: Number(collateralAuction.startTime.toString()),
          endTime: auction.end.isSome ? Number(auction.end.toString()) : undefined,
          lastBidder: lastBidder && lastBidder.toString(),
          lastBid: lastBid && lastBid.toString()
        };
      }),
      drr()
    );
  }
Example #2
Source File: LiquidityPoolTask.ts    From guardian with Apache License 2.0 5 votes vote down vote up 
getSyntheticPools = (apiRx: ApiRx) => (poolId: number | number[] | 'all') => {
  const upcomingPools$ = apiRx.query.baseLiquidityPoolsForSynthetic.nextPoolId().pipe(
    pairwise(),
    filter(([, next]) => !next.isZero()),
    switchMap(([prev, next]) => range(prev.toNumber(), next.toNumber())),
    distinctUntilChanged(),
    mergeMap((poolId) =>
      combineLatest([
        of(poolId.toString()),
        apiRx.query.baseLiquidityPoolsForSynthetic.pools(poolId).pipe(
          filter((x) => x.isSome),
          map((x) => x.unwrap())
        )
      ])
    )
  );

  if (poolId === 'all') {
    return apiRx.query.baseLiquidityPoolsForSynthetic.pools.entries().pipe(
      mergeMap((x) => x),
      filter(([, value]) => value.isSome),
      mergeMap(
        ([
          {
            args: [poolId]
          },
          pool
        ]) => combineLatest([of(poolId.toString()), of(pool.unwrap())])
      ),
      concatWith(upcomingPools$)
    );
  } else {
    return of(castArray(poolId)).pipe(
      mergeMap((x) => x),
      switchMap((poolId) =>
        combineLatest([of(poolId.toString()), apiRx.query.baseLiquidityPoolsForSynthetic.pools(poolId)])
      ),
      filter(([, pool]) => pool.isSome),
      mergeMap(([poolId, value]) => combineLatest([of(poolId), of(value.unwrap())]))
    );
  }
}