AugurProject/augur-ui

/**
 * Prepares price history data for charting
 *
 * @param {Object} outcome
 * @param {Object} marketPriceHistory
 * @return {Array}
 */
export const selectPriceTimeSeries = (outcome, marketPriceHistory) => {
  if (
    outcome == null ||
    outcome.id == null ||
    marketPriceHistory == null ||
    marketPriceHistory[outcome.id] == null
  ) {
    return [];
  }

  return marketPriceHistory[outcome.id].map(priceTimePoint => ({
    price: priceTimePoint.price,
    amount: priceTimePoint.amount,
    timestamp: priceTimePoint.timestamp * 1000
  }));
};