settings_migrator.js

"use strict"

const DefaultSettings = {
  "enabled": true,
  "complete_delay": 0,
  "players": {}
}

module.exports = function MigrateSettings(from_ver, to_ver, settings) {
  if (from_ver === undefined) {
    // Migrate legacy config file
    return DefaultSettings;
  } else if (from_ver === null) {
    // No config file exists, use default settings
    return DefaultSettings;
  } else {
    // Migrate from older version (using the new system) to latest one
    if (from_ver + 1 < to_ver) {
      // Recursively upgrade in one-version steps
      settings = MigrateSettings(from_ver, from_ver + 1, settings);
      return MigrateSettings(from_ver + 1, to_ver, settings);
    }

    switch (to_ver)
    {
      case 2:
        settings = Object.assign(settings, DefaultSettings);
        break;
    }

    return settings;
  }
}