bat-8.x-1.x-dev/modules/bat_options/bat_options.module

<?php

/**
 * @file
 * This file misses a description.
 */

define('BAT_OPTIONS_ADD', 'add');
define('BAT_OPTIONS_ADD_DAILY', 'add-daily');
define('BAT_OPTIONS_SUB', 'sub');
define('BAT_OPTIONS_SUB_DAILY', 'sub-daily');
define('BAT_OPTIONS_REPLACE', 'replace');
define('BAT_OPTIONS_INCREASE', 'increase');
define('BAT_OPTIONS_DECREASE', 'decrease');
define('BAT_OPTIONS_NOCHARGE', 'no_charge');
define('BAT_OPTIONS_OPTIONAL', 'optional');
define('BAT_OPTIONS_MANDATORY', 'mandatory');
define('BAT_OPTIONS_ONREQUEST', 'on_request');

use Drupal\bat_unit\Entity\UnitType;

/**
 * Returns the available price options for booking_unit options field.
 */
function bat_options_price_options() {
  $options = [
    BAT_OPTIONS_ADD => t('Add to price'),
    BAT_OPTIONS_ADD_DAILY => t('Add to price per night'),
    BAT_OPTIONS_SUB => t('Subtract from price'),
    BAT_OPTIONS_SUB_DAILY => t('Subtract from price per night'),
    BAT_OPTIONS_REPLACE => t('Replace price'),
    BAT_OPTIONS_INCREASE => t('Increase price by % amount'),
    BAT_OPTIONS_DECREASE => t('Decrease price by % amount'),
    BAT_OPTIONS_NOCHARGE => t('No charge'),
  ];

  return $options;
}

/**
 * Returns available options given a Bat type.
 *
 * @param \Drupal\bat_unit\Entity\UnitType $type
 *   The type from which to retrieve options.
 *
 * @return array
 *   The available options for the given type.
 */
function bat_options_get_type_options(UnitType $type) {
  $options = &drupal_static(__FUNCTION__);

  if (isset($options['types'][$type->id()])) {
    return $options['types'][$type->id()];
  }

  $type_options = is_array($type->getTranslation('und')->get('field_addons')) ? $type->getTranslation('und')->get('field_addons') : [];
  $options['types'][$type->id()] = $type_options;

  return $options['types'][$type->id()];
}

/**
 * Converts option human name to its machine name.
 *
 * @param string $option_name
 *   The human option name.
 * @param string $pattern
 *   The pattern used to convert. By default "/[^a-z0-9_]+/".
 * @param string $replacement
 *   The replacement string. By default "_".
 *
 * @return string
 *   The option machine name.
 */
function bat_options_get_machine_name($option_name, $pattern = '/[^a-z0-9_]+/', $replacement = '_') {
  return preg_replace($pattern, $replacement, mb_strtolower($option_name));
}

/**
 * Given an option, return a string that explains the operation.
 */
function bat_options_get_operation_label($option) {
  $label = '';

  $currency_symbol = '$';

  switch ($option['operation']) {
    case 'add':
      $label = t('+@amount@currency_symbol to price', [
        '@amount' => $option['value'],
        '@currency_symbol' => $currency_symbol,
      ]);
      break;

    case 'add-daily':
      $label = t('+@amount@currency_symbol per night to price', [
        '@amount' => $option['value'],
        '@currency_symbol' => $currency_symbol,
      ]);
      break;

    case 'sub-daily':
      $label = t('-@amount@currency_symbol per night from price', [
        '@amount' => $option['value'],
        '@currency_symbol' => $currency_symbol,
      ]);
      break;

    case 'replace':
      $label = t('Replace price with @amount@currency_symbol', [
        '@amount' => $option['value'],
        '@currency_symbol' => $currency_symbol,
      ]);
      break;

    case 'increase':
      $label = t('Increase price by @amount%', [
        '@amount' => $option['value'],
      ]);
      break;

    case 'decrease':
      $label = t('Decrease price by @amount%', [
        '@amount' => $option['value'],
      ]);
      break;

    case 'sub':
      $label = t('-@amount@currency_symbol from price', [
        '@amount' => $option['value'],
        '@currency_symbol' => $currency_symbol,
      ]);
      break;

  }

  return $label;
}

/**
 * Calculate the price for an option.
 */
function bat_options_get_option_price($booking_price, $option, $quantity, $nights) {
  $price = 0;

  switch ($option['operation']) {
    case BAT_OPTIONS_ADD:
      $price += $option['value'];
      break;

    case BAT_OPTIONS_ADD_DAILY:
      $price += $option['value'] * $nights;
      break;

    case BAT_OPTIONS_SUB:
      $price -= $option['value'];
      break;

    case BAT_OPTIONS_SUB_DAILY:
      $price -= $option['value'] * $nights;
      break;

    case BAT_OPTIONS_REPLACE:
      $price = $option['value'] - $booking_price;
      break;

    case BAT_OPTIONS_INCREASE:
      $price += $booking_price * $option['value'] / 100;
      break;

    case BAT_OPTIONS_DECREASE:
      $price -= $booking_price * $option['value'] / 100;
      break;
  }

  return $price * 100;
}