[normalise_array.php] Normalise a nested array

normalise.php

function formatOptionGroups($raw_option_groups) {
  //Normalise everything
  $return = [
    'option_groups' => [],
    'option_types'  => [],
    'option_values' => [],
    'option_prices' => [],
  ];

  //Foreach Group (eg Size/Simple Prong)
  foreach($raw_option_groups as $raw_option_group) {
    $base_option_group  = $this->mapObject($raw_option_group);
    $group_option_types  = $this->mapObjects($raw_option_group->optionTypes, ['optionValues']);
    $group_option_values = $this->mapObjects($raw_option_group->optionValues, ['options', 'display']);

    //Foreach group type (eg Cut)
    foreach($group_option_types as $group_option_type) {
      //The applicable option prices in the intersection of the groups values with This types values
      $option_type_values = $this->mapObjects($group_option_type['optionValues'], ['options', 'display']);
      $type_option_values = $this->arrayIntersect($group_option_values, $option_type_values);

      foreach($type_option_values as $type_option_value) {
        $value_option_prices = $this->mapObjects($type_option_value['options'], ['priceModifier']);

        foreach($value_option_prices as $value_option_price) {
          //This option price may already exist
          $existing_option_price_id = $this->findInArrayByID($return['option_prices'], (int)$value_option_price['id']);
          if($existing_option_price_id) {
            //Just add option value id to id list
            $return['option_prices'][$existing_option_price_id]['option_value_ids'][] = (int)$type_option_value['id'];
          } else {
            //Add option price to option price array
            $value_option_price['option_value_ids'] = [(int)$type_option_value['id']];
            $value_option_price['option_group_id'] = (int)$base_option_group['id'];
            $value_option_price['option_type_id']  = (int)$group_option_type['id'];
            $return['option_prices'][] = $value_option_price;
          }
        }

        //Add option value to option value array
        $type_option_value['option_group_id'] = (int)$base_option_group['id'];
        $type_option_value['option_type_id']  = (int)$group_option_type['id'];
        $return['option_values'][] = $type_option_value;
      }

      //Add option type to option type array
      $group_option_type['group_id'] = (int)$base_option_group['id']; //Add option group id to option type
      $return['option_types'][]      = $group_option_type;

    }

    //Add option group to option groups
    $return['option_groups'][] = $base_option_group;
  }

  return $return;
}