bracket-data/lib/regex.js

Get some helpful data for a tournament bracket.

var consts = require("./constants");
var getBestOfRange = require("./bestOfRange");

var longestStr = function (arr) {
  var l = 0;
  for (var i = 0, m = arr.length; i < m; i++) {
    l = Math.max(l, arr[i].length);
  }
  return l;
};

module.exports = function (data) {
  var CONSTS = consts(data);

  var regionAlphas = CONSTS.REGION_IDS.join("");
  var biggestAlphaLength = longestStr(CONSTS.REGION_IDS);

  var biggestSeedLength = CONSTS.TEAMS_PER_REGION.toString().length;

  var bestOfLength =
    data.bestOf === 1
      ? 0
      : Array.isArray(data.bestOf)
      ? 1
      : data.bestOf.toString().length;
  var bestOfRange = getBestOfRange(data.bestOf);

  var maxRegionPickLength = biggestSeedLength + bestOfLength;
  var maxFinalPickLength = biggestAlphaLength + bestOfLength;

  var possiblePickLength = function (i, max) {
    var index = i - 1;
    return index + "," + index * max;
  };

  var regionRegEx =
    "([" +
    regionAlphas +
    "]{1," +
    biggestAlphaLength +
    "})([\\d" +
    CONSTS.UNPICKED_MATCH +
    "]{" +
    possiblePickLength(CONSTS.TEAMS_PER_REGION, maxRegionPickLength) +
    "})";
  var finalRegEx =
    "(" +
    CONSTS.FINAL_ID +
    ")([" +
    regionAlphas +
    CONSTS.UNPICKED_MATCH +
    bestOfRange.join("") +
    "]{" +
    possiblePickLength(CONSTS.REGION_COUNT, maxFinalPickLength) +
    "})";

  return new RegExp(
    new Array(CONSTS.REGION_COUNT + 1).join(regionRegEx) + finalRegEx
  );
};