Battle INF script

/**
 * From http:// pastebin.com/N8yf8QYb
 * Battle INF item handler (v3.5)
 */

/*global ScriptAPI, API, items*/
(function (ScriptAPI, API, items) {
  "use strict";

  var rarityToGrind = 1, // This rarity & lower is merged & sold
    raritiesToSave = [2, 3, 4, 5, 6], // These rarities are merged with exactly matching items
    rarityToSell = 1, // This rarity & lower is simply sold if it has no other use
    defaultTimeout = 30, // Timeout for notifications
    allowAging = 1, // 1 ages inventory, 2 ages equipped items, 3 ages both
    showNotifications = [false, true, false, false]; // [ grind, merge, sell, keep ]

  function getInventory() { // Get inventory items
    return ScriptAPI.$user.inventory.items;
  }

  function getEquipment() { // Get equipped items
    return ScriptAPI.$user.character.equipment;
  }

  function notify(message, timeout) { // Create a notification
    API.notifications.create(message, timeout || defaultTimeout);
  }

  function sell(item) { // Sell an item
    if (showNotifications[2]) {
      notify("\u2604 " + item.name + " \u2606" + item.rarity + ".");
    }

    ScriptAPI.$userService.sellItem(item); // Sell item

    return true;
  }

  function keep(item) { // Keep an item
    if (showNotifications[3]) {
      notify("\u2764 " + item.name + " \u2606" + item.rarity + ".");
    }

    return true;
  }

  function craft(primary, secondary, option) { // Craft items
    var tmp;

    if (primary.ts > secondary.ts) { // Ensures primary is older than secondary
      tmp = primary;
      primary = secondary;
      secondary = tmp;
    }

    if (primary.rarity < secondary.rarity) { // Ensures primary is rarer than secondary
      tmp = primary;
      primary = secondary;
      secondary = tmp;
    }

    // Notify
    if (option === 1 && showNotifications[0]) {
      notify("\u267A " + primary.name + " \u2606" + primary.rarity + " \u2190 " + secondary.name + " \u2606" + secondary.rarity + ".");
    }

    if (option === 2 && showNotifications[1]) {
      notify("\u2726 " + primary.name + " \u2606" + primary.rarity + " +" + primary.plus + " \u2190 " + secondary.name + " \u2606" + secondary.rarity + " +" + secondary.plus + ".");
    }

    ScriptAPI.$craftingService.craftItems(primary, secondary); // Craft item
    return primary;
  }

  function grind(item) { // Grind item with another in inventory
    var items = getInventory(),
      i;

    for (i = 0; i < items.length; i++) {
      if ((items[i] !== item) && (items[i].rarity <= rarityToGrind) && !items[i].lock) {
        ScriptAPI.$userService.sellItem(craft(items[i], item, 1)); // Grind items & sell result
        return true;
      }
    }
  }

  function merge(item) { // Merge with a similar item in inventory or equipped
    var items = getInventory().concat(getEquipment()),
      i;

    for (i = 0; i < items.length; i++) {
      if ((items[i] !== item) && (items[i].rarity === item.rarity) && (items[i].name === item.name) && (items[i].mod === item.mod) && (items[i].plus + item.plus < (5 * item.rarity + 5)) && !items[i].lock) {
        craft(items[i], item, 2); // Merge items
        return true;
      }
    }
  }

  function aging(setting) {
    var items,
      i;

    if (setting === 1) { // Age items in inventory
      items = getInventory();
    } else if (setting === 2) { // Age equipped items
      items = getEquipment();
    } else if (setting === 3) { // Age all items
      items = getEquipment().concat(getInventory());
    }

    if (items) {
      for (i = 0; i < items.length; i++) {
        ScriptAPI.$craftingService.ageUpItem(items[i]);
      }
    }
  }

  // Handle new item
  items.forEach(function (item) {
    var isDone = false;

    // Check if item meets requirements for grinding
    if (item.rarity <= rarityToGrind) {
      isDone = grind(item);
    }

    // Checks if item meets requirements for merging
    if (!isDone && raritiesToSave.indexOf(item.rarity) >= 0) {
      isDone = merge(item);
    }

    // Checks if item meets requirements for selling
    if (!isDone && (item.rarity <= rarityToSell)) {
      isDone = sell(item);
    }

    // If no function has been run, item will be kept
    if (!isDone) {
      isDone = keep(item);
    }
  });

  // Triggers item aging function
  if (allowAging > 0) {
    aging(allowAging);
  }
}(ScriptAPI, API, items));