shopPRO/autoload/front/Controllers/ShopProductController.php

<?php
namespace front\Controllers;

class ShopProductController
{
  private $categoryRepository;

  public function __construct( \Domain\Category\CategoryRepository $categoryRepository )
  {
    $this->categoryRepository = $categoryRepository;
  }

  public function lazyLoadingProducts()
  {
    global $lang_id;

    $output = '';
    $categoryId = (int)\Shared\Helpers\Helpers::get( 'category_id' );
    $products_ids = $this->categoryRepository->productsId(
      $categoryId,
      $this->categoryRepository->getCategorySort( $categoryId ),
      $lang_id,
      8,
      (int)\Shared\Helpers\Helpers::get( 'offset' )
    );

    if ( is_array( $products_ids ) ): foreach ( $products_ids as $product_id ):
      $output .= \Shared\Tpl\Tpl::view( 'shop-product/product-mini', [
        'product' => \shop\Product::getFromCache( $product_id, $lang_id )
      ] );
      endforeach;
    endif;

    echo json_encode( [ 'html' => $output ] );
    exit;
  }

  public function warehouseMessage()
  {
    global $lang_id;

    $values = json_decode( \Shared\Helpers\Helpers::get( 'values' ), true );

    $attributes = [];
    foreach ( $values as $key => $val )
    {
      if ( $key != 'product-id' and $key != 'quantity' )
        $attributes[] = $val;
    }

    $result = \shop\Product::getWarehouseMessage( $values['product-id'], $attributes, $lang_id );
    echo json_encode( $result );
    exit;
  }

  public function drawProductAttributes()
  {
    global $lang_id;

    $combination = '';
    $selected_values = \Shared\Helpers\Helpers::get( 'selected_values' );

    foreach ( $selected_values as $value )
    {
      $combination .= $value;
      if ( $value != end( $selected_values ) )
        $combination .= '|';
    }

    $product_id = \Shared\Helpers\Helpers::get( 'product_id' );
    $product = \shop\Product::getFromCache( $product_id, $lang_id );
    $product_data = $product->getProductDataBySelectedAttributes( $combination );

    echo json_encode( [ 'product_data' => $product_data ] );
    exit;
  }
}