AugurProject/augur-ui

import memoize from "memoizee";
import store from "src/store";
import { formatNumber } from "utils/format-number";

export default function(outcomes) {
  const { loginAccount } = store.getState();

  return selectUserOpenOrdersSummary(outcomes, loginAccount);
}

const selectUserOpenOrdersSummary = memoize(
  (outcomes, loginAccount) => {
    if (loginAccount.address == null) {
      return null;
    }

    const openOrdersCount = (outcomes || []).reduce(
      (openOrdersCount, outcome) =>
        openOrdersCount +
        (outcome.userOpenOrders ? outcome.userOpenOrders.length : 0),
      0
    );

    return {
      openOrdersCount: formatNumber(openOrdersCount, {
        denomination: "Open Orders"
      })
    };
  },
  { max: 10 }
);