<?php
/**
 * Content component: Shop Cart
 *
 * $Id: Static.php 780 2010-06-15 21:54:38Z gerd $
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage content
 */

/**
 * Load classes
 */
WBClass::load('WBContent'
    , 'WBHtml_JS'
    , 'WBShop'
    , 'WBShop_Cart'
    );

/**
 * Content component: Shop Cart
 *
 * @version 0.3.1
 * @package WB
 * @subpackage content
 */
class WBContent_Shop_Cart extends WBContent
{
   /**
    * my parameter list
    *
    * - mode can be: "gauge", "display" or "admin"
    * - action: list, edit, ...
    * - cart: select individual cart
    * - tmpl: use alternate template (for gauge mode)
    * - csvdelimiter: for export
    * - csvenclosure: for export
    * - captcha: mode for form captcha
    * - requiredgroup: authorisation
    * - usefilter (0) filter lists, display filter form, use form definition
    *   in filter.xml and filter.tmpl to render form.
    *
    * @var array
    */
    protected $config = array(
            'mode'          =>  'display',
            'action'        =>  'list',
            'status'        =>  '',
            'cart'          =>  '__active',
            'tmpl'          =>  '',
            'goto'          =>  0,
            'csvdelimiter'  =>  ',',
            'csvenclosure'  =>  '"',
            'captcha'       =>  'auto',
            'requiredgroup' =>  parent::GROUP_ANON,
            'usefilter'     =>  0
        );

    /**
     * cart
     * @var WBShop_Cart
     */
    private $cart;

    /**
     * article
     * @var WBShop_Article
     */
    private $article;

    /**
     * shopping-cart is not cachable
     * @var
     */
    protected $cachable =   false;

    /**
     * Current form to change status
     * @var string
     */
    private $formStatus =   '';

   /**
    * run
    *
    * Dispatch action config parameter and call method that actually fills
    * HTML templates.
    *
    * @return array parameter list
    */
    public function run()
    {
        $this->addConfigAsGlobalVars();
        if (is_array($this->config['status'])) {
            $this->tmpl->addGlobalVar('config_status', implode(',', $this->config['status']));
        }

        if (!$this->isUserInGroup($this->config['requiredgroup'])) {
            $this->loadTemplates('anon');
            return $this->config;
        }

        $this->tmpl->addGlobalVar('cart_mode', $this->config['mode']);
        $this->tmpl->addGlobalVar('cart_uid', $this->user->getId());

        $this->article  =   WBClass::create('WBShop_Article');

        $params =   array();
        if ('admin' == $this->config['mode']) {
            $params['mode'] =   WBShop_Cart::CART_MODE_ADMIN;
        }
        $this->cart     =   WBClass::create('WBShop_Cart', $params);
        $this->cart->setUser($this->user->getId());
        $this->cart->setNamespace($this->req->get('namespace', ''));

        $this->config['action'] =   strtolower($this->config['action']);

        $nextAction =   strtolower($this->req->get('nextaction', 'list'));
        if (!in_array($nextAction, array('display', 'edit', 'list'))) {
            $nextAction =   'list';
        }

        switch ($this->config['action']) {
            case 'create':
                $this->create();
                break;

            case 'copy':
                $this->copy();
                break;

            case 'copypublic':
                $this->copypublic();
                break;

            case 'merge':
                $this->merge();
                break;

            case 'update':
                $this->updateItem();
                break;

            case 'delete':
                $this->delete();
                break;

            case 'import':
                $this->import();
                break;

            case 'export':
                $this->export();
                return $this->config;
                break;

            case 'setattributes':
                $this->setAttributes();
                break;

            case 'notify':
                $this->notify();
                break;

            case 'setstatus':
                if ($this->setStatus()) {
                    return $this->config;
                }
                break;

            case 'additems':
                $nextAction =   'edit';
                $article    =   $this->req->get('article', '');
                if (is_array($article)) {
                    $this->req->set('article', '__list');
                    $this->addItems($article);
                }
                break;

            case 'edit':
            case 'add':
                $nextAction =   'edit';
                break;

            case 'display':
                $nextAction =   'display';
                break;

            case 'displaypublic':
                $nextAction =   'displaypublic';
                break;

            case 'list':
            default:
                $nextAction =   'list';
                break;
        }

        switch ($nextAction) {
            case 'edit':
                $this->edit();
                break;

            case 'display':
                $this->display();
                break;

            case 'displaypublic':
                $this->display(true);
                break;

            case 'list':
            default:
                $this->listCarts();
                break;
        }
        return $this->config;
    }

    /**
     * Update items in cart
     *
     * Update quantity and comment
     */
    private function updateItem()
    {
        $this->load();
        $item   =   $this->req->get('item', '');
        if (empty($item)) {
            $this->req->set('save');
            $this->edit();
            return;
        }

        $quantity   =   intval($this->req->get('quantity', '-1'));
        if (0 > $quantity) {
            $this->req->set('save');
            $this->edit();
            return;
        }

        // $comment    =   $this->req->get('comment', '');
        $comment    =   NULL;
        $data       =   $this->req->export();
        if (isset($data['comment'])) {
            $comment    =   $data['comment'];
        }
        $this->tmpl->addGlobalVar('message', 'item_saved');
        $this->cart->set($item, $quantity, $comment);

        // set attributes
        $this->cart->setItemAttributes($item, $data);

        $this->cart->save();
        $this->req->set('save');
        $this->edit();
    }

    /**
     * create a new cart
     */
    private function create()
    {
        if (!$this->user->getId()) {
            return;
        }

        $this->cart->save();
    }

    /**
     * Create a new cart
     *
     * Copy cart to my own carts. If in admin mode, simply clone cart including owner's id.
     * Current cart will become new cart
     */
    private function copy()
    {
        if (!$this->user->getId()) {
            return;
        }
        $this->load();

        // make unique title
        $fmt    =   $this->cart->getTitle() . ' (%d)';
        $cnt    =   2;
        $title  =   sprintf($fmt, $cnt);
        $unique =   false;

        $list   =   $this->cart->getList();
        while (!$unique) {
            $found  =   false;
            foreach ($list as $l) {
                if ($l['title'] == $title) {
                    $found  =   true;
                    break;
                }
            }

            $unique =   true;
            if ($found) {
                $unique =   false;
                ++$cnt;
                $title  =   sprintf($fmt, $cnt);
            }
        }

        $params =   array();
        $uid    =   $this->user->getId();
        if ('admin' == $this->config['mode']) {
            $params['mode'] =   WBShop_Cart::CART_MODE_ADMIN;
            $uid    =   $this->cart->getUser();
        }

        $copy   =   WBClass::create('WBShop_Cart', $params);
        $copy->setUser($uid);
        $copy->merge($this->cart);
        $copy->setTitle($title);
        $copy->save();
        $this->cart =   $copy;
    }

    /**
     * Copy public cart
     *
     * Copy cart to my own carts.
     * Current cart will become new cart
     */
    private function copypublic()
    {
        if (!$this->user->getId()) {
            return;
        }

        $public =   WBClass::create('WBShop_Cart');
        /** @var $public WBShop_Cart */
        $public->load($this->config['cart'], true);

        $copy   =   WBClass::create('WBShop_Cart');
        /** @var $copy WBShop_Cart */
        $copy->setUser($this->user->getId());
        $copy->merge($public);
        $copy->save();
        $this->config['cart']   =   $copy->getId();
    }

    /**
     * Merge one cart with other
     *
     * Select other cart and merge with current (loaded).
     * In case no other cart is selected yet, display list of
     * selectable carts
     */
    private function merge()
    {
        if (!$this->user->getId()) {
            return;
        }

        $this->load();
        $other  =   $this->req->get('other', '');

        // try to load other cart
        if (!empty($other)) {
            $params =   array();
            $uid    =   $this->user->getId();
            if ('admin' == $this->config['mode']) {
                $params['mode'] =   WBShop_Cart::CART_MODE_ADMIN;
                $uid    =   $this->cart->getUser();
            }
            $cart   =   WBClass::create('WBShop_Cart', $params);
            $cart->setUser($uid);
            $cart->load($other);
            if ('__new' == $cart->getId() || $thiy->cart->getId() == $cart->getId()) {
                $other  =   '';
            }
        }

        if (empty($other)) {
            $this->loadTemplates('merge');
            $this->tmpl->addGlobalVars($this->cart->get(), 'ORG_');
            $status =   array('saved', 'active');
            $list   =   $this->cart->getList($status, $this->cart->getId());
            $this->tmpl->addRows('cart_entry', $list);
            return;
        }

        // actual merge
        $this->cart->merge($cart);
        $this->cart->save();
    }

    /**
     * Notify
     *
     * Simply trigger event
     */
     private function notify()
     {
        $event  =   $this->req->get('event', '');
        if (empty($event)) {
            return;
        }

        $this->load();
        $this->cart->notify($event);
        $this->tmpl->addGlobalVar('message', 'cart_notify_' . $event);
        return;
     }

    /**
     * Set status of cart
     *
     *
     */
    private function setStatus()
    {
        $this->load();
        $new    =   $this->req->get('statusnew');

        if (empty($new)) {
            return false;
        }

        $this->formStatus   =   $this->cart->getRequiredForm($new);
        $this->tmpl->addGlobalVar('status_form_name', $this->formStatus);
        $this->tmpl->addGlobalVar('statusnew', $new);
        $this->tmpl->addGlobalVar('id', $this->cart->getId());
        if (empty($this->formStatus)) {
            if ($this->cart->setStatus($new)) {
                $this->tmpl->addGlobalVar('message', 'cart_status');
            }
            return false;
        }

        $cart   =   $this->cart->get();
        $this->tmpl->addGlobalVars($cart);

        // copy default values from user data
        if ($this->user->isAuthenticated()) {
            $userData   =   $this->user->getData();

            // name
            if (isset($cart['customername']) && !empty($cart['customername'])) {
                $cart['customername']   =   $userData['forename'] . ' ' . $userData['surname'];
            }

            // e-mail
            if (isset($cart['customeremailurlid']) && empty($cart['customeremailurlid'])) {
                $dict   =   WBClass::create('WBDictionary_URL');
                $dict->addWord($userData['email']);
                $cart['customeremailurlid'] =   $dict->getId();
            }

            // generic copy of user data if form element's name startes with "customer"
            foreach ($cart as $key => &$value) {

                // only non-empty values
                if (!empty($value)) {
                    continue;
                }

                // those fields are well known
                if (in_array($key, array('customername', 'customeremailurlid'))) {
                    continue;
                }

                // use prefix
                if (0 != strncmp($key, 'customer', 8)) {
                    continue;
                }

                $suffix =   substr($key, 8);
                if (isset($userData[$suffix])) {
                    $value  =   $userData[$suffix];
                }
            }
        }

        $this->processForm('status', $cart);
        $this->formStatus   =   '';
        return true;
    }

   /**
    * Update Status And Set Attributes
    *
    * Update cart after form was filled
    *
    * @param patForms $form
    * @param array $values
    * @return bool always true
    */
    public function onStatusValid($form, $values)
    {
        $this->cart->setAttributes($values);
        $this->cart->setStatus($this->req->get('statusnew'));
        $this->cart->save();
        return true;
    }

    /**
     * Set Cart's Attributes
     *
     */
    private function setAttributes()
    {
        $this->load();
        $this->cart->setAttributes($this->req->export());
        $this->cart->save();
        $this->tmpl->addGlobalVar('message', 'attributes_saved');
    }

    /**
     * Edit cart attributes
     *
     * Process form "edit"
     * @param bool
     */
    private function edit()
    {
        $this->parseFormTmpl    =   false;
        $this->load();

        $cart   =   $this->cart->get();
        $this->tmpl->addGlobalVars($cart);

        // two forms: add item and edit
        $this->processForm('additem', $cart, 'additemsave');
        $this->processForm('edit', $cart);

        $stat   =   $this->req->get('status', 'saved');
        if ('__new' == $this->config['cart'] && 'active' == $stat ) {
            $this->cart->setStatus('active');
        }

        $cart   =   $this->cart->get();
        $this->tmpl->addGlobalVars($cart);

        if ($this->tmpl->exists('item_entry')) {
            $items  =   $this->getItems();
            $this->tmpl->addRows('item_entry', $items);
        }
        $this->parseFormTmpl    =   true;
    }

    private function addItems($items)
    {
        $this->load();
        if (!is_array($items) ||  empty($items)) {
            return;
        }

        foreach ($items as $id => $item) {
            $this->cart->add($id, $item['quantity']);
        }

        // update discount
        if ($this->req->has('discount')) {
             $this->cart->setDiscount($this->req->get('discount'));
        }

        $this->cart->save();
    }

   /**
    * Add items to cart
    *
    * Plainly add items using article-no
    *
    * @param patForms $form
    * @param array $values
    * @return bool always false
    */
    public function onAdditemValid($form, $values)
    {
        // Nothing to add?
        if (empty($values['article']) || '__list' == $values['article']) {
            $this->req->set('additemsave');
            $this->processForm('additem', $this->cart->get());
            return false;
        }

        // Quantity
        $quantity   =   1;
        if (isset($values['quantity'])) {
            $quantity   =   $values['quantity'];
        }

        // Use namespace
        $namespace  =   '';
        $atts       =   array();
        if (isset($values['namespace']) && !empty($values['namespace'])) {
            $namespace  =   $values['namespace'];
            if ('__NULL' == $namespace) {
                $namespace  =   '';
            }

            // copy attributes from item with same namespace
            $items  =   $this->cart->getItems();
            foreach ($items as $i) {
                if ($i['namespace'] == $namespace) {
                    $atts   =   $i;
                    break;
                }
            }
        }

        $this->cart->setNamespace($namespace);
        $this->cart->add($values['article'], $quantity);
        if (!empty($atts)) {
            $this->cart->setItemAttributes($values['article'], $atts);
        }
        $this->cart->save();

        $this->req->set('additemsave');
        $this->processForm('additem', $this->cart->get());

        return false;
    }

   /**
    * Save cart entry
    *
    * Store record in database and add user id for new records.
    * Return false to avoid loading "editValid" template. Instead,
    * remove "save" parameter from request and redisplay the form
    *
    * @param patForms $form
    * @param array $values
    * @return bool always false
    */
    public function onEditValid($form, $values)
    {
        if (!isset($values['public'])) {
            $values['public']   =   0;
        }

        if ($this->req->has('title')) {
            $this->cart->setTitle($values['title']);
        }
        if ($this->req->has('note')) {
            $this->cart->setNote($values['note']);
        }
        if ($this->req->has('public')) {
             $this->cart->setPublic($values['public']);
        }
        if ($this->req->has('discount')) {
             $this->cart->setDiscount($values['discount']);
        }

        $this->cart->setAttributes($values);
        $this->cart->save();

        // redisplay form
        $this->tmpl->addGlobalVars($this->cart->get());
        $this->req->set('save');
        $this->processForm('edit', $this->cart->get());

        $this->tmpl->addGlobalVar('message', 'cart_saved');
        return false;
    }

    /**
     * Remova cart
     *
     */
    private function delete()
    {
        if (!$this->user->getId()) {
            return;
        }

        $this->load();
        $this->cart->delete();
    }

    /**
     * List Carts
     *
     * List all carts owned by current user.
     */
    private function listCarts()
    {
        $this->tmpl->addGlobalVar('id', '');
        $tmpl   =   $this->getSubTmplName('list');
        $this->loadTemplates($tmpl);
        $status =   array('saved', 'active');
        if (!empty($this->config['status'])) {
            $status =   $this->config['status'];
            if (!is_array($status)) {
                $status = explode(',', $status);
            }
        }

        $this->tmpl->addGlobalVar('cart_status', implode(',', $status));
        if (WBShop_Cart::CART_MODE_ADMIN == $this->config['mode']) {
            $pager  =   array();
            $list   =   $this->cart->browseList($this->config['goto'], $pager, $status);
            $this->tmpl->addGlobalVars($pager, 'pager_');
        }
        else {
            $list   =   $this->cart->getList($status);
        }
        $this->tmpl->addGlobalVar('cart_count', count($list));
        $this->tmpl->addRows('cart_entry', $list);
    }

    /**
     * Display cart's detailstatus
     *
     * Load cart by id (or active one)
     */
    private function display()
    {
        $tmpl   =   $this->getSubTmplName('display');
        $this->load();
        $this->loadTemplates($tmpl);

        if ('gauge' == strtolower($this->config['mode'])) {
            WBHtml_JS::add('WB/Ajax/Shop');
            WBHtml_JS::add('WB/Ajax/Shop/Cart');
            WBHtml_JS::add(sprintf('WB.Ajax.Shop.Cart.useGauge("%s", "%s");', $this->part, $this->config['tmpl']), WBHtml_JS::AREA_FOOT);
        }

        if ($this->tmpl->exists('item_entry')) {
            $items  =   $this->getItems();
            $this->tmpl->addRows('item_entry', $items);
        }

        $this->tmpl->addGlobalVars($this->cart->get());
    }

    /**
     * Import CSV file as new cart
     *
     * Upload CSV file, either in "standard" format (same as export format) or as simple list of
     * articles and quantities.
     */
    private function import()
    {
        $this->loadTemplates('import');
        if (!isset($_FILES) || empty($_FILES)) {
            return;
        }

        $error  =   array();
        $import =   array();
        foreach ($_FILES as $file) {
            $file['errormsg']   =   '';
            if ($file['error']
                || empty($file['tmp_name'])
                || (1 > $file['size'])) {
                $file['errormsg']   =   'upload';
                $error[]    =   $file;
                continue;
            }

            if ('text/csv' != $file['type']) {
                $file['errormsg']   =   'type';
                $error[]    =   $file;
                continue;
            }

            $imp        =   $this->importUpload($file);
            if (empty($imp)) {
                $file['errormsg']   =   'format';
                $error[]    =   $file;
                continue;
            }

            $import[]   =   $imp;
        }
        if (!empty($error)) {
            $this->tmpl->addGlobalVar('error_countx', count($error));
            $this->tmpl->addRows('error_entry', $error);
        }

        if (!empty($import)) {
            $this->tmpl->addGlobalVar('import_count', count($import));
            $this->tmpl->addRows('import_entry', $import);
        }
    }

    /**
     * Export cart as CSV-table
     *
     * Load selected cart. Transform to CSV format and start download
     *
     * CAUTION. This method does not return. CSV-Download will be initiated
     */
    private function export()
    {
        $this->load();
        $file   =   WBClass::create('WBFile');
        /** @var WBFile $file */
        $file   =   $file->tempnam('cart');
        $csv    =   fopen($file->realpath(), 'w');
        $data   =   $this->cart->get();

        $head   =   $this->cart->getConfig()->get('cart/export/cart/head', array('title' => 'name', 'note' => 'note', 'date' => 'date'));
        fputcsv($csv, array($head['title'], $data['title']), $this->config['csvdelimiter'], $this->config['csvenclosure']);
        fputcsv($csv, array($head['note'], $data['note']), $this->config['csvdelimiter'], $this->config['csvenclosure']);
        fputcsv($csv, array($head['date'], gmdate('Y-m-d H:i:s')), $this->config['csvdelimiter'], $this->config['csvenclosure']);
        fputcsv($csv, array(), $this->config['csvdelimiter'], $this->config['csvenclosure']);

        $colConf    =   $this->cart->getConfig()->get('cart/export/cartitem/column', array());
        $headConf   =   $this->cart->getConfig()->get('cart/export/cartitem/head', array());
        $cols       =   array();
        $head       =   array();
        foreach ($colConf as $i => $c) {
            if (!is_array($c) && empty($c['requiredgroup'])) {
                $cols[] =   $c;
                if (empty($headConf[$i])) {
                    $headConf[$i]   =   $c;
                }
                $head[] =   $headConf[$i];
                continue;
            }
            if (!$this->isUserInGroup($c['requiredgroup'])) {
                continue;
            }
            $cols[] =   $c['column'];
            if (empty($headConf[$i])) {
                $headConf[$i]   =   $c['column'];
            }
            $head[] =   $headConf[$i];
        }
        unset($colConf);
        unset($headConf);

        fputcsv($csv, $head, $this->config['csvdelimiter'], $this->config['csvenclosure']);
        $items  =   $this->getItems();
        foreach ($items as $i) {
            $row    =   array();
            foreach ($cols as $c) {
                if (isset($i[$c])) {
                    $row[$c]    =   $i[$c];
                }
            }
            fputcsv($csv, $row, $this->config['csvdelimiter'], $this->config['csvenclosure']);
        }
        fclose($csv);

        // switch off compression - otherwise complete download files are loaded to RAM
        WBParam::set('wb/response/compress', 0);

        $res  =   WBClass::create('WBResponse');
        /** @var $res WBResponse */
        $res->add(file_get_contents($file->realpath()));
        $file->unlink();

        $res->addHeader('Content-Type', 'text/csv');
        $res->addHeader('Content-Disposition', 'filename="cart-' . $this->cart->getId() . '.csv"');
        $res->send($this->req);
        exit(0);
    }

    /**
     * load cart object
     *
     */
    private function load()
    {
        $this->tmpl->addGlobalVar('cart_load', $this->config['cart']);
        if ('__active' == $this->config['cart']) {
            $this->cart->loadActive();
            return ;
        }

        $this->cart->load($this->config['cart']);
        if ($this->config['cart'] != $this->cart->getId()) {
            $this->tmpl->addGlobalVar('cart_load', 'failed');
        }
    }

    /**
     * Fetch and enrich items
     *
     * Get items from current cart and enrich them with article data
     * Auxilliary method.
     *
     * @param bool $enrich
     * @return array $items
     */
    private function getItems($enrich = true)
    {
        $items  =   $this->cart->getItems();

        if (!$enrich) {
            return $items;
        }

        $primary    =   $this->article->getIdentifer();
        foreach ($items as &$i) {
            $this->article->load($i[$primary]);
            $i  =   array_merge($this->article->get(), $i);
        }

        return $items;
    }

    /**
     * Get template name in sub dir
     *
     * @param string $tmpl
     */
    private function getSubTmplName($tmpl)
    {
        if (empty($this->config['tmpl'])) {
            return $tmpl;
        }

        return  $tmpl   .=  '/' . $this->config['tmpl'];
    }

   /**
    * receive output
    *
    * Display parsed template
    *
    * @return string
    */
    public function getString()
    {
        return $this->tmpl->getParsedTemplate();
    }

   /**
    * location of form config
    *
    * Return sub directory where form element definitions are located
    *
    * @return string folder
    */
    protected function getFormConfigDir()
    {
        return 'shop/cart/form';
    }

    /**
     * Import uploaded CSV file
     *
     * Upload poarameter represents on uploaded file, see: $_FILES
     * Detect format of CSV file and import it, if possible.
     *
     * @param array $upload
     */
    private function importUpload($upload)
    {
        $csv    =   fopen($upload['tmp_name'], 'r');
        $fmt    =   $this->detectCSVFormat($csv);

        if (!$fmt['ok']) {
            fclose($csv);
            unlink($upload['tmp_name']);
            return null;
        }

        $this->importUploadCSV($csv, $fmt, $upload);

        fclose($csv);
        unlink($upload['tmp_name']);
        return $upload;
    }

    /**
     * Try to detect CSV file's format
     *
     * Detect delimiter, enclosure of CSV file.
     * Furthermore detects whether the contains standard format (same as export format)
     *
     * @param stream $csv
     * @return array $fmt
     */
    private function detectCSVFormat($csv)
    {
        $delimiter  =   array(';', ',', "\t");
        $enclosure  =   array("'", '"');

        $fmt    =   array(
                    'ok'    =>  false,
                    'std'   =>  false,
                    'del'   =>  '',
                    'enc'   =>  ''
                );

        foreach ($delimiter as $d) {
            foreach ($enclosure as $e) {
                fseek($csv, 0);
                $row1   =   fgetcsv($csv, 0, $d, $e);
                $row2   =   array();
                if (feof($csv)) {
                    fseek($csv, 0);
                }
                $row2   =   fgetcsv($csv, 0, $d, $e);

                // require two columns
                if (2 > min(count($row1), count($row2))) {
                    continue;
                }

                if ('name' == strtolower($row1[0]) && 'note' == strtolower($row2[0])) {
                    $fmt['std'] =   true;
                }

                $oe =   '"';
                if ('"' == $e) {
                    $oe =   "'";
                }
                // does enclsure work as expected?
                foreach ($row1 as $c) {
                    // onclosure does not seem to match, try next
                    if ($c != trim($c, $oe)) {
                        continue 2;
                    }
                }

                $fmt['ok']  =   true;
                $fmt['enc'] =   $e;
                $fmt['del'] =   $d;
                break 2;
            }

        }
        fseek($csv, 0);
        return $fmt;
    }

    /**
     * Import CSV file
     *
     * Create new cart, set title and note (for standard CSV-files) and add all the items
     *
     * @param stream $csv
     * @param array $fmt
     * @param array $upload
     */
    private function importUploadCSV($csv, $fmt, &$upload)
    {
        // new cart
        $cart   =   WBClass::create('WBShop_Cart');
        $cart->setUser($this->user->getId());

        // standard format?
        if ($fmt['std']) {
            $row    =   fgetcsv($csv, 0, $fmt['del'], $fmt['enc']);
            array_map('trim', $row);
            $cart->setTitle($row[1]);
            $upload['title']    =   $row[1];
            $row    =   fgetcsv($csv, 0, $fmt['del'], $fmt['enc']);
            array_map('trim', $row);
            $cart->setNote($row[1]);
        }

        // default map: article: column 0, quantity: column 1
        $mapFound   =   false;
        $map        =   array(
                            'article'   =>  0,
                            'quantity'  =>  1
                        );
        $upload['item_count']   =   0;

        // try to find better map using headline
        while (!feof($csv)) {
            $row    =   fgetcsv($csv, 0, $fmt['del'], $fmt['enc']);
            if (empty($row)) {
                continue;
            }
            array_map('trim', $row);
            $row    =   array_map('strtolower', $row);
            if (!in_array('article', $row)) {
                continue;
            }
            $map        =   array_flip($row);
            $mapFound   =   true;
            break;
        }
        if (!$mapFound) {
            fseek($csv, 0);
        }
        $upload['item_count']   =   $this->importItems2Cart($csv, $fmt, $map, $cart);

        $cart->save();
        $upload['id']   =   $cart->getId();
    }

    /**
     * Import items from CSV file
     *
     * Use column map to load article ids from CSV and add articles with quantity and comment
     *
     * @param stream $csv
     * @param array $fmt
     * @param array $map
     * @param array $upload
     */
    private function importItems2Cart($csv, $fmt, $map, $cart)
    {
        $count  =   0;

        // add items to cart
        $art    =   WBClass::create('WBShop_Article');
        while (!feof($csv)) {
            $row    =   fgetcsv($csv, 0, $fmt['del'], $fmt['enc']);
            if (empty($row)) {
                continue;
            }
            array_map('trim', $row);

            $a  =   $row[$map['article']];
            $art->load($a);

            // invalid article id
            if ($art->getId() != $a) {
                continue;
            }
            $q  =   1;
            if (isset($map['quantity'])) {
                $q  =   intval($row[$map['quantity']]);
            }
            $c  =   '';
            if (isset($map['comment'])) {
                $c  =   $row[$map['comment']];
            }
            ++$count;
            $cart->add($a, $q, $c);
        }

        return $count;
    }

   /**
    * Fetch list of form elements
    *
    * Use different file regardless of actual form name.
    *
    * @param string name of form
    * @return array $elements
    * @todo see how to implement with cart-filter
    */
    protected function getFormElementList($name)
    {
        if ('status' != $name) {
            // $this->formTmplName =   'snippet';
            return parent::getFormElementList($name);
        }


        // $this->formTmplName =   'snippet-status-' . $status;

        $name   =   $this->formStatus;
        $list   =   parent::getFormElementList($name);

        $this->injectElement4Captcha($list, $this->user->isAuthenticated(), $this->config['captcha']);

        return $list;
    }
}