UpsellWP: Brief "Choose any" attribute variants

UpsellWP: Brief "Choose any" attribute variants

add_filter('cuw_get_product_data', function ($data, $product, $args) {
    if (empty($args['to_display'])) {
        return $data;
    }
    if (!empty($data['is_variable']) && method_exists($product, 'get_available_variations')) {
        $has_choose_any_variant = false;
        $available_variations = $product->get_available_variations();
        if (!empty($available_variations) && is_array($available_variations)) {
            foreach ($available_variations as $variation_data) {
                if (!empty($variation_data['attributes'])) {
                    foreach ($variation_data['attributes'] as $value) {
                        if ($value === '') {
                            $has_choose_any_variant = true;
                            break;
                        }
                    }
                }
            }
        }
        if (!$has_choose_any_variant || empty($data['variants']) || !function_exists('wc_attribute_label')) {
            return $data;
        }

        $attribute_labels = [];
        $parent_attributes = $product->get_attributes();
        foreach ($parent_attributes as $slug => $attribute) {
            $attribute_labels[$slug] = wc_attribute_label($attribute->get_name());
        }

        $variants = [];
        foreach ($data['variants'] as $variant) {
            $is_choose_any_variant = false;
            if (!empty($variant['attributes'])) {
                foreach ($variant['attributes'] as $value) {
                    if ($value === '') {
                        $is_choose_any_variant = true;
                        break;
                    }
                }
            }

            if ($is_choose_any_variant) {
                $standalone_attributes = [];
                $choose_any_attributes = [];
                foreach ($variant['attributes'] as $slug => $value) {
                    if (!empty($value)) {
                        $standalone_attributes[$slug][] = [
                            'value' => $value,
                            'slug' => $slug,
                            'slug_label' => $attribute_labels[$slug],
                            'value_label' => $value,
                        ];
                    } elseif (!empty($parent_attributes[$slug])) {
                        $attribute = $parent_attributes[$slug];
                        $terms = wc_get_product_terms($product->get_id(), $slug, ['fields' => 'all']);
                        foreach ($attribute['options'] as $attr_id) {
                            if (is_string($attr_id)) {
                                $choose_any_attributes[$slug][] = [
                                    'value' => $attr_id,
                                    'slug' => $slug,
                                    'slug_label' => $attribute_labels[$slug] ?? $slug,
                                    'value_label' => $attr_id,
                                ];
                            } elseif (!empty($terms)) {
                                foreach ($terms as $term) {
                                    if ($attr_id == $term->term_id) {
                                        $choose_any_attributes[$slug][] = [
                                            'value' => $term->slug,
                                            'slug' => $slug,
                                            'slug_label' => $attribute_labels[$slug],
                                            'value_label' => $term->name,
                                        ];
                                        break;
                                    }
                                }
                            }
                        }
                    }
                }

                $i = 0;
                $attribute_combinations = [];
                if (!empty($standalone_attributes)) {
                    foreach ($standalone_attributes as $slug => $values) {
                        foreach ($values as $value) {
                            if (!empty($choose_any_attributes)) {
                                foreach ($choose_any_attributes as $c_slug => $c_values) {
                                    foreach ($c_values as $c_value) {
                                        $attribute_combinations[$i][] = $value;
                                        $attribute_combinations[$i][] = $c_value;
                                        $i++;
                                        if ($i >= 1000) break 4;
                                    }
                                }
                            }
                        }
                    }
                } else {
                    if (count($choose_any_attributes) == 1) {
                        foreach ($choose_any_attributes as $slug => $values) {
                            foreach ($values as $value) {
                                $attribute_combinations[$i][] = $value;
                                $i++;
                                if ($i >= 1000) break 2;
                            }
                        }
                    } elseif (count($choose_any_attributes) == 2) {
                        foreach ($choose_any_attributes as $slug => $values) {
                            foreach ($values as $value) {
                                foreach ($choose_any_attributes as $c_slug => $c_values) {
                                    foreach ($c_values as $c_value) {
                                        if ($slug != $c_slug) {
                                            $attribute_combinations[$i][] = $value;
                                            $attribute_combinations[$i][] = $c_value;
                                            $i++;
                                            if ($i >= 1000) break 4;
                                        }
                                    }
                                }
                            }
                            unset($choose_any_attributes[$slug]);
                        }
                    } else {
                        return $data;
                    }
                }

                $id = $variant['id'];
                foreach ($attribute_combinations as $key => $attributes) {
                    $vid = $id;
                    $info = [];
                    foreach ($attributes as $attribute) {
                        $vid .= '|' . $attribute['slug'] . ':' . $attribute['value'];
                        $info[] = $attribute['slug_label'] . ': ' . $attribute['value_label'];
                    }
                    $variant['id'] = $vid;
                    $variant['info'] = implode(', ', $info);
                    $variants[] = $variant;
                }
            } else {
                $variants[] = $variant;
            }
        }

        if (!empty($variants)) {
            $data['variants'] = $variants;
        }
    } elseif (method_exists($product, 'get_attributes')) {
        $data['attributes'] = $product->get_attributes();
    }
    return $data;
}, 100, 3);

if (!function_exists('cuw_reformat_item_data')) {
    function cuw_reformat_item_data($data)
    {
        if (!empty($data['product']['variation_id']) && !is_numeric($data['product']['variation_id'])) {
            $parts = explode('|', $data['product']['variation_id']);
            $data['product']['variation_id'] = $parts[0];
            unset($parts[0]);
            $data['product']['variation'] = [];
            foreach ($parts as $part) {
                $attr = explode(':', $part);
                $data['product']['variation']['attribute_' . $attr[0]] = $attr[1];
            }
        }
        return $data;
    }

    add_filter('cuw_product_item_data', 'cuw_reformat_item_data', 100);
    add_filter('cuw_offer_item_data', 'cuw_reformat_item_data', 100);
}