function cw_product_get($params, $return = null)
{
    extract($params);
    global $customer_id, $customer_id_type, $current_area, $cart, $current_location;
    global $current_language, $tables, $config, $addons;
    cw_load('files', 'taxes', 'tags');
    $lang = $lang ? $lang : $current_language;
    $variant_id = $variant_id ? $variant_id : 0;
    $amount = intval($amount > 0 ? $amount : 1);
    $fields = $from_tbls = $query_joins = $where = array();
    # kornev, merge standart and additional variables
    if ($return) {
        foreach ($return as $saname => $sadata) {
            if (isset(${$saname}) && is_array(${$saname}) && empty(${$saname})) {
                ${$saname} = $sadata;
            }
        }
    }
    $from_tbls[] = 'products';
    $where[] = "{$tables['products']}.product_id='{$id}'";
    # kornev
    # customer area - all of the checkings
    # pos area - not check for membership, just available for sale property
    if (in_array($current_area, array('C'))) {
        $memberships = array(0);
        if ($user_account['membership_id'] > 0) {
            $memberships[] = intval($user_account['membership_id']);
        }
        $where[] = "{$tables['products_memberships']}.membership_id IN (" . join(',', $memberships) . ")";
        $where[] = "{$tables['products_prices']}.quantity <= {$amount} and {$tables['products_prices']}.membership_id in (" . join(',', $memberships) . ")";
        if ($config['Appearance']['categories_in_products'] == '1') {
            $where[] = "{$tables['categories_memberships']}.membership_id IN (" . join(',', $memberships) . ")";
            $query_joins['products_categories'] = array('on' => "{$tables['products_categories']}.product_id = {$tables['products']}.product_id", 'pos' => '0', 'is_straight' => 1);
            $query_joins['categories'] = array('on' => "{$tables['products_categories']}.category_id = {$tables['categories']}.category_id", 'parent' => 'products_categories');
            $query_joins['categories_memberships'] = array('on' => "{$tables['categories_memberships']}.category_id = {$tables['categories']}.category_id", 'parent' => 'categories', 'is_straight' => 1);
        }
        $where[] = "{$tables['products']}.status in ('" . implode("', '", cw_core_get_required_status($current_area)) . "')";
    } elseif (in_array($current_area, array('G'))) {
        $where[] = "{$tables['products']}.product_id = {$tables['products_prices']}.product_id AND {$tables['products_prices']}.quantity <= {$amount} and {$tables['products_prices']}.membership_id in (" . join(',', $memberships) . ")";
    }
    $fields[] = "{$tables['products']}.*";
    $query_joins['products_warehouses_amount'] = array('on' => "{$tables['products']}.product_id = {$tables['products_warehouses_amount']}.product_id and {$tables['products_warehouses_amount']}.warehouse_customer_id=0 and {$tables['products_warehouses_amount']}.variant_id='{$variant_id}'");
    $in_cart = 0;
    if ($current_area == 'C' && !empty($cart) && !empty($cart['products'])) {
        foreach ($cart['products'] as $cart_item) {
            if ($cart_item['product_id'] == $id) {
                $in_cart += $cart_item['amount'];
            }
        }
    }
    $fields[] = "{$tables['products_warehouses_amount']}.avail-{$in_cart} AS avail";
    # kornev, TOFIX
    if ($addons['product_options'] && in_array($current_area, array('A', 'P'))) {
        $query_joins['product_variants'] = array('on' => "{$tables['products']}.product_id = {$tables['product_variants']}.product_id");
        $fields[] = "IF({$tables['product_variants']}.product_id IS NULL, '', 'Y') as is_variants";
    }
    /*
        if ($addons['manufacturers']) {
            $query_joins['manufacturers'] = array(
                'on' => "$tables[manufacturers].manufacturer_id = $tables[products].manufacturer_id",
            );
            $fields[] = "$tables[manufacturers].manufacturer";
        }
    */
    // statistic
    $fields[] = "{$tables['products_stats']}.views_stats";
    $fields[] = "{$tables['products_stats']}.sales_stats";
    $fields[] = "{$tables['products_stats']}.del_stats";
    $fields[] = "{$tables['products_stats']}.add_to_cart";
    $query_joins['products_stats'] = array('on' => "{$tables['products_stats']}.product_id = {$tables['products']}.product_id");
    if ($current_area == 'A' || $current_area == 'P') {
        $fields[] = "{$tables['products_prices']}.price";
        $fields[] = "{$tables['products_prices']}.list_price";
        $query_joins['products_prices'] = array('on' => "{$tables['products_prices']}.product_id={$tables['products']}.product_id AND {$tables['products_prices']}.variant_id = '{$variant_id}' and {$tables['products_prices']}.quantity <= {$amount}");
    } else {
        $query_joins['products_prices'] = array('on' => "{$tables['products_prices']}.product_id={$tables['products']}.product_id", 'is_inner' => 1);
        # kornev, find the min price and select only this record.
        $fields[] = "min({$tables['products_prices']}.price) as price";
        $fields[] = "{$tables['products_prices']}.variant_id";
        $fields[] = "min({$tables['products_prices']}.list_price) as list_price";
    }
    $fields[] = "IF({$tables['products_lng']}.product_id != '', {$tables['products_lng']}.product, {$tables['products']}.product) as product";
    $fields[] = "IF({$tables['products_lng']}.product_id != '', {$tables['products_lng']}.descr, {$tables['products']}.descr) as descr";
    $fields[] = "IF({$tables['products_lng']}.product_id != '', {$tables['products_lng']}.fulldescr, {$tables['products']}.fulldescr) as fulldescr";
    $fields[] = "IF({$tables['products_lng']}.product_id != '', {$tables['products_lng']}.features_text, {$tables['products']}.features_text) as features_text";
    $fields[] = "IF({$tables['products_lng']}.product_id != '', {$tables['products_lng']}.specifications, {$tables['products']}.specifications) as specifications";
    $query_joins['products_lng'] = array('on' => "{$tables['products_lng']}.code='{$lang}' AND {$tables['products_lng']}.product_id = {$tables['products']}.product_id");
    if (in_array($current_area, array('C', 'G', 'S'))) {
        $fields[] = "{$tables['products_flat']}.*";
        $query_joins['products_flat'] = array('on' => "{$tables['products']}.product_id = {$tables['products_flat']}.product_id");
        if ($current_area == 'C') {
            $query_joins['products_memberships'] = array('on' => "{$tables['products_memberships']}.product_id = {$tables['products']}.product_id", 'is_inner' => 1);
        }
    }
    if ($config['Appearance']['categories_in_products'] == '1') {
        $fields[] = "{$tables['products_categories']}.category_id";
        $query_joins['categories'] = array('parent' => 'products_categories', 'on' => "{$tables['categories']}.category_id = {$tables['products_categories']}.category_id");
        $query_joins['products_categories'] = array('on' => "{$tables['products_categories']}.product_id = {$tables['products']}.product_id and {$tables['products_categories']}.main=1", 'pos' => '0', 'is_straight' => 1);
    }
    $fields[] = "{$tables['products']}.product_id";
    $query = cw_db_generate_query($fields, $from_tbls, $query_joins, $where, array("{$tables['products']}.product_id"), array(), array());
    $product = cw_query_first($query);
    # Error handling
    if (!$product || $current_area == 'C' && !$product['category_id'] && $config['Appearance']['categories_in_products'] == '1') {
        return false;
    }
    $product['system'] = cw_call('cw_product_get_system_info', array($product['product_id']));
    $product['attribute_class_ids'] = cw_func_call('cw_items_attribute_classes_get', array('item_id' => $product['product_id'], 'item_type' => 'P', 'for_product_modify' => $for_product_modify));
    if ($info_type & 1) {
        $product['membership_ids'] = cw_query_key("select membership_id from {$tables['products_memberships']} where product_id = '{$product['product_id']}'");
    }
    # kornev, TOFIX
    if ($info_type & 64 && $product['variant_id'] && $addons['product_options']) {
        $tmp = cw_query_first("SELECT * FROM {$tables['product_variants']} WHERE variant_id = '{$product['variant_id']}'");
        if (!empty($tmp)) {
            cw_unset($tmp, "def");
            $product = cw_array_merge($product, $tmp);
        } else {
            cw_unset($product, 'variant_id');
        }
    }
    if ($info_type & 128) {
        cw_load('image');
        $product['image_thumb'] = cw_image_get('products_images_thumb', $id);
    }
    if ($info_type & 512) {
        $product['image_det'] = cw_image_get('products_images_det', $id);
        # kornev, TOFIX
        if (in_array($current_area, array('C', 'B')) && $product['variant_id'] && $addons['product_options']) {
            $var_image = cw_image_get('products_images_var', $id);
            if (!$var_image['is_default']) {
                $product['image_det'] = $var_image;
            }
        }
    }
    # TOFIX
    if (in_array($current_area, array('C', 'B', 'G'))) {
        if (!$addons['egoods']) {
            $product['distribution'] = '';
        }
        $product['display_price'] = $product['price'];
        if ($current_area == 'C' && $info_type & 8) {
            $_tmp_price = $product['price'];
            $product['price'] = $product['list_price'];
            cw_get_products_taxes($product, $user_account);
            $product['list_price_net'] = $product['list_price'];
            $product['list_price'] = $product['taxed_price'];
            $product['price'] = $_tmp_price;
        }
        $product['taxes'] = cw_get_products_taxes($product, $user_account, false, '', $current_area == 'G' && $user_account['usertype'] != 'R');
    }
    if (in_array($current_area, array('C', 'B'))) {
        $product['descr'] = cw_eol2br($product['descr']);
        $product['fulldescr'] = cw_eol2br($product['fulldescr']);
    }
    $product['uns_shippings'] = unserialize($product['shippings']);
    $product['tags'] = cw_tags_get_product_tags($id);
    if ($info_type & 4096 && $product['warranty_id']) {
        $wr = cw_get_warranty($product['warranty_id'], $lang);
        $product['warranties'] = $wr['body'];
    }
    // TODO: move to addon as on_product_get handler
    if ($info_type & 8192) {
        cw_load('warehouse');
        if ($addons['warehouse']) {
            if (AREA_TYPE == 'A') {
                $product['avail_ordered'] = cw_warehouse_get_avail($id, 0, 'avail_ordered');
                $product['avail_sold'] = cw_warehouse_get_avail($id, 0, 'avail_sold');
                $product['avail_reserved'] = cw_warehouse_get_avail($id, 0, 'avail_reserved');
            } elseif (AREA_TYPE == 'P') {
                $product['avail'] = cw_warehouse_get_warehouse_avail($customer_id, $id);
                $product['avail_ordered'] = cw_warehouse_get_warehouse_avail($customer_id, $id, 'avail_ordered');
            } else {
                // TOFIX:  $product['avail'] becomes different meanings when info_type & 8192 flag is raised or not
                // without flag - avail of all variants without products already in cart
                // with flag - total avail as set in admin per variant
                //                $product['avail'] = cw_warehouse_get_avail_for_customer($id, $product['variant_id']);
                //                $product['avails']= cw_warehouse_get_avails_customer($id);
                $product['avail'] = cw_warehouse_get_avail_for_customer($id, $product['variant_id']);
            }
        } else {
            $product['avails'] = cw_warehouse_get_avails_customer($id, $product['avail'] + $product['avail_ordered']);
        }
    }
    return $product;
}
function cw_send_survey_invitation($survey_id, $email, $customer_id, $force = false)
{
    global $smarty, $config, $tables, $http_location;
    global $app_main_dir, $admin_safe_mode, $app_catalogs;
    static $store_surveys = array();
    include $app_main_dir . "/include/safe_mode.php";
    cw_load("mail", "user");
    # Check respondent status
    $is_valid = cw_query_first_cell("SELECT COUNT(*) FROM {$tables['survey_maillist']} WHERE survey_id = '{$survey_id}' AND email = '" . addslashes($email) . "' AND sent_date = 0") > 0;
    if (!$is_valid && !$force) {
        return -1;
    }
    if (!isset($store_surveys[$survey_id])) {
        $store_surveys[$survey_id] = cw_get_survey($survey_id);
    }
    $survey = $store_surveys[$survey_id];
    $survey['complete'] = cw_eol2br($survey['complete']);
    $survey['header'] = cw_eol2br($survey['header']);
    $survey['footer'] = cw_eol2br($survey['footer']);
    $smarty->assign('survey', $survey);
    # Geet access key
    $access_key = cw_query_first_cell("SELECT access_key FROM {$tables['survey_maillist']} WHERE survey_id = '{$survey_id}' AND email = '" . addslashes($email) . "'");
    if (empty($access_key)) {
        # Generate access key
        srand(cw_core_microtime());
        $access_key = md5(rand(0, time()));
        cw_array2update("survey_maillist", array("access_key" => $access_key), "survey_id = '{$survey_id}' AND email = '" . addslashes($email) . "'");
    }
    $smarty->assign('link', $http_location . "/survey.php?survey_key=" . $access_key);
    # Get repondents info (if respondent - customer)
    $userinfo = array();
    if (!empty($customer_id)) {
        $userinfo = cw_user_get_info($customer_id);
        $smarty->assign('userinfo', $userinfo);
    } else {
        $smarty->assign('userinfo', false);
    }
    # Send invitation
    $to_customer = $userinfo['language'] ? $userinfo['language'] : $config['default_customer_language'];
    cw_call('cw_send_mail', array($config['Company']['support_department'], $email, "mail/survey_invitation_subj.tpl", "mail/survey_invitation.tpl"));
    cw_array2update("survey_maillist", array("sent_date" => time(), "delay_date" => 0), "survey_id = '{$survey_id}' AND email = '" . addslashes($email) . "'");
    return true;
}