Scores ROMs based on the suffixes attached to them, and prints out ROMs that pass this test.

pick_best_roms.js

var colors = require('colors');
var _ = require('lodash');


const DEBUG = false;
const CUTOFF = -500;


/**
 * Basic util to select the "best" ROM from the ones provided. Grouped by stuff before (, or [ chars
 */

function _score(name) {
  var out = 0;

  function _add(num) {
    out += num;
  }

  // Parse parenthesis sections:
  name.replace(/\(.*?\)/g, function (txt) {
    var str = String(txt).slice(1,-1);
    if (str === "beta")    { return _add(-20); }  // Beta version
    if (/hack/i.test(str)) { return _add(-999); } // ROM hack
    if (str[0] === "U")    { return _add(50); }   // USA release
    if (str[0] === "E")    { return _add(30); }   // Europe release
    if (str[0] === "J")    { return _add(10); }   // Japanese release
    
    // Give very minor boosts to later revisions:
    var m = str.match(/REV (\d+)/);
    if (m) { return _add( parseInt(m[1], 10) ); }
  });

  // Parse bracketted sections:
  var brackets = 0;
  name.replace(/\[.*?\]/g, function (txt) {
    brackets ++;
    var str = String(txt).slice(1,-1);
    if (str    === "!") { return _add(100); } // Preferred copy
    if (str[0] === "h") { return _add(-20); } // ROM hack?
    if (str[0] === "b") { return _add(-30); } // Broken ROM
    if (str[0] === "p") { return _add(-20); } // Pirate copy
    if (str[0] === "T") { return _add(-20); } // Fan translation
    if (str[0] === "a") { return _add(-10); } // Alternate
  });

  // No modifiers get a slight bonus:
  if (brackets === 0) { _add(10); }

  return out;
}

var groups = _.groupBy(process.argv.slice(2), name => String(name).replace(/[\[\(].*/, "").replace(/\.\w+$/, ""));

Object.keys(groups).forEach(function (key) {
  var list = groups[key];

  DEBUG && console.log("===", key, "=====");

  var with_scores = list.map(n => ({ name: n, score: _score(n) }));
  var sorted = _.sortBy(with_scores, "score").reverse();

  sorted.forEach(function (item) {
    var is_best = item.score === sorted[0].score;
    var color = (is_best) ? "yellow" : "cyan";
    DEBUG && console.log(item.name[color], String(item.score).yellow);

    if (!DEBUG && is_best && item.score >= CUTOFF) {
      console.log(item.name);
    }
  });
  
  DEBUG && console.log();

});