ams = array(), $content = '', $only_return_data = false)
    {
        if (!$post_id)
        {
            global $post;
            $post_id = $post->ID;
        }

        // Get modules data
        $data = array();
        foreach ($module_ids as $module_id)
        {
            $module_data = $this->getData($module_id, $post_id, $params);

            //groups filter
            if (!empty($params['groups']))
            {
                foreach ($module_data as $key => $d)
                {
                    if (empty($d['group']) || !in_array($d['group'], $params['groups']))
                        unset($module_data[$key]);
                }
            }

            // product IDs filter
            if (!empty($params['products']))
            {
                foreach ($module_data as $key => $d)
                {
                    if (!in_array($d['unique_id'], $params['products']))
                        unset($module_data[$key]);
                }
            }

            // hide fields
            if (!empty($params['hide']))
            {
                foreach ($module_data as $key => $d)
                {
                    foreach ($params['hide'] as $hide)
                    {
                        if ($hide == 'title')
                            $module_data[$key]['_alt'] = $module_data[$key]['title'];
                        if (isset($d[$hide]))
                            $module_data[$key][$hide] = '';
                    }
                }
            }

            if ($module_data)
                $data[$module_id] = $module_data;

            // shortcoded!
            if (!isset($params['shortcoded']) || (bool) $params['shortcoded'])
                Shortcoded::getInstance($post_id)->setShortcodedModule($module_id);
        }

        // remove duplicates
        if (!empty($params['remove_duplicates_by']))
        {
            if ($duplicate_ids = ContentManager::findDuplicateIds($data, $params['remove_duplicates_by']))
            {
                foreach ($data as $module_id => $module_data)
                {
                    foreach ($module_data as $unique_id => $d)
                    {
                        if (in_array($unique_id, $duplicate_ids))
                            unset($data[$module_id][$unique_id]);
                    }

                    if (!count($data[$module_id]))
                        unset($data[$module_id]);
                }
            }
        }

        if (!$data)
            return;

        // template
        if ($params['template'] != 'block_greenshift')
        {
            $tpl_manager = BlockTemplateManager::getInstance();
            if (empty($params['template']) || !$tpl_manager->isTemplateExists($params['template']))
                return;
        }
        $template = $params['template'];

        // next, limit, offset
        if (!isset($this->block_data_pointer[$post_id]))
            $this->block_data_pointer[$post_id] = array();

        if (!empty($params['next']))
        {
            if (!isset($this->block_data_pointer[$post_id][$template]))
                $this->block_data_pointer[$post_id][$template] = 0;

            $data = $this->spliceBlockData($data, $this->block_data_pointer[$post_id][$template], $params['next'], $params['order'], $params['sort']);
            $count = $this->countBlockData($data);
            if ($count < $params['next'])
                $params['next'] = $count;
            $this->block_data_pointer[$post_id][$template] += $params['next'];
        }
        elseif (!empty($params['limit']))
        {
            if (!isset($params['offset']))
                $params['offset'] = 0;

            $data = $this->spliceBlockData($data, $params['offset'], $params['limit'], $params['order'], $params['sort']);
            $this->block_data_pointer[$post_id][$module_id] = $params['offset'] + $params['limit'];
        }
        elseif (!empty($params['order']) || !empty($params['sort']))
            $this->spliceBlockData($data, 0, 999999, $params['order'], $params['sort']);

        if (!$data)
            return;

        if (!empty($params['title']))
            $title = $params['title'];
        else
            $title = '';

        if (!empty($params['cols']))
            $cols = $params['cols'];
        else
            $cols = 0;

        if ($only_return_data)
            return $data;

        return $tpl_manager->render($params['template'], array('data' => $data, 'post_id' => $post_id, 'params' => $params, 'title' => $title, 'cols' => $cols, 'sort' => $params['sort'], 'order' => $params['order'], 'groups' => $params['groups'], 'btn_text' => $params['btn_text'], 'atts' => $params, 'content' => $content));
    }

    private function spliceBlockData($data, $offset, $length, $order = null, $sort = null)
    {
        if ($order || $sort)
        {
            if (!$sort)
                $sort = 'price';

            if (!$order)
                $order = 'ask';

            if ($sort == 'price' || $sort == 'discount')
                return $this->spliceBlockDataSorted($data, $offset, $length, $order, $sort);
        }

        $results = array();
        $count = 0;
        $results_count = 0;
        foreach ($data as $module_id => $module_data)
        {
            $results[$module_id] = array();
            foreach ($module_data as $key => $data)
            {
                if ($count < $offset)
                {
                    $count++;
                    continue;
                }

                $results[$module_id][$key] = $data;
                $count++;
                $results_count++;

                if ($results_count >= $length)
                    return $results;
            }
        }
        return $results;
    }

    private function spliceBlockDataSorted($data, $offset, $length, $order = 'ask', $sort = 'price')
    {
        $all_items = TemplateHelper::sortAllByPrice($data, $order, $sort);
        $all_items = array_splice($all_items, $offset, $length);

        $results = array();
        foreach ($all_items as $item)
        {
            if (!isset($results[$item['module_id']]))
                $results[$item['module_id']] = array();

            $results[$item['module_id']][$item['unique_id']] = $item;
        }

        return $results;
    }

    private function countBlockData($data)
    {
        $count = 0;
        foreach ($data as $module_id => $module_data)
        {
            $count += count($module_data);
        }
        return $count;
    }
}