habitica/website/server/libs/items/utils.js

import { last } from 'lodash';
import shared from '../../../common';
import { model as User } from '../../models/user'; // eslint-disable-line import/no-cycle

// Build a list of gear items owned by default
const defaultOwnedGear = {};

Object.keys(shared.content.gear.flat).forEach(key => {
  const item = shared.content.gear.flat[key];
  if (item.key.match(/(armor|head|shield)_warrior_0/) || item.gearSet === 'glasses' || item.gearSet === 'headband') {
    defaultOwnedGear[item.key] = true;
  }
});

export function getDefaultOwnedGear () {
  // Clone to avoid modifications to the original object
  return { ...defaultOwnedGear };
}

// When passed a path to an item in the user object it'll return true if
// it's valid, false otherwsie
// Example of an item path: `items.gear.owned.head_warrior_0`
export function validateItemPath (itemPath) {
  // The item path must start with `items.`
  if (itemPath.indexOf('items.') === 0) {
    if (User.schema.paths[itemPath]) return true;

    const key = last(itemPath.split('.'));

    if (itemPath.indexOf('items.gear.owned') === 0) {
      return Boolean(shared.content.gear.flat[key]);
    }

    if (itemPath.indexOf('items.pets') === 0) {
      return Boolean(shared.content.petInfo[key]);
    }

    if (itemPath.indexOf('items.eggs') === 0) {
      return Boolean(shared.content.eggs[key]);
    }

    if (itemPath.indexOf('items.hatchingPotions') === 0) {
      return Boolean(shared.content.hatchingPotions[key]);
    }

    if (itemPath.indexOf('items.food') === 0) {
      return Boolean(shared.content.food[key]);
    }

    if (itemPath.indexOf('items.mounts') === 0) {
      return Boolean(shared.content.mountInfo[key]);
    }

    if (itemPath.indexOf('items.quests') === 0) {
      return Boolean(shared.content.quests[key]);
    }
  }

  if (itemPath.indexOf('purchased.') === 0) {
    const parts = itemPath.split('.');
    const key = last(parts);
    const type = parts[parts.length - 2];

    if (itemPath.indexOf('hair.') === 10) {
      return Boolean(shared.content.appearances.hair[type][key]);
    }
    return Boolean(shared.content.appearances[type][key]);
  }

  return false;
}

// When passed a value of an item in the user object it'll convert the
// value to the correct format.
// Example a numeric string like "5" applied to a food item (expecting an integer)
// will be converted to the number 5
export function castItemVal (itemPath, itemVal) {
  if (
    itemPath.indexOf('items.pets') === 0
    || itemPath.indexOf('items.eggs') === 0
    || itemPath.indexOf('items.hatchingPotions') === 0
    || itemPath.indexOf('items.food') === 0
    || itemPath.indexOf('items.quests') === 0
  ) {
    return Number(itemVal);
  }

  if (itemPath.indexOf('items.mounts') === 0) {
    // Mounts are true when you own them and null when you have used Keys to the Kennel
    // to release them.
    // Empty string or undefined means "unset" i.e. never owned.
    if (['', 'undefined'].includes(itemVal)) return undefined;
    if (itemVal === 'null' || itemVal === 'false') return null;
    if (itemVal) return true; // any truthy value
    return null; // any false value
  }

  if (itemPath.indexOf('items.gear.owned') === 0) {
    // Gear is true when you own it and false if you previously owned it but lost it (e.g., Death)
    // Null, empty string, or undefined are taken to mean "unset" i.e. never owned.
    if (['null', '', 'undefined'].includes(itemVal)) return undefined;
    return Boolean(itemVal);
  }

  return itemVal;
}