xmr-btc-swap/src-gui/src/utils/sortUtils.ts

import { ExtendedMakerStatus } from "models/apiModel";
import { isMakerOnCorrectNetwork, isMakerOutdated } from "./multiAddrUtils";
import _ from 'lodash';

export function sortMakerList(list: ExtendedMakerStatus[]) {
  return _(list)
    // Filter out makers that are on the wrong network (testnet / mainnet)
    .filter(isMakerOnCorrectNetwork)
    // Sort by criteria
    .orderBy(
      [
        // Prefer makers that have a 'version' attribute
        // If we don't have a version, we cannot clarify if it's outdated or not
        m => (m.version ? 0 : 1),
        // Prefer makers that are not outdated
        m => (isMakerOutdated(m) ? 1 : 0),
        // Prefer makers that have a relevancy score
        m => (m.relevancy == null ? 1 : 0),
        // Prefer makers with a higher relevancy score
        m => -(m.relevancy ?? 0),
        // Prefer makers with a lower price
        m => m.price
      ],
      ['asc', 'asc', 'asc', 'asc', 'asc']
    )
    // Remove duplicate makers
    .uniqBy(m => m.peerId)
    .value();
}