/**
     * @return string
     */
    public function getRentalQueueTable()
    {
        $sendItemsHtml = '<table class="data" cellspacing="0">
			<thead>
				<tr class="headings">
					<th width="100px">' . Mage::helper('payperrentals')->__("Has Empty Queue") . '</th>
					<th>' . Mage::helper('payperrentals')->__("Customer Name") . '</th>
					<th>' . Mage::helper('payperrentals')->__("Product Allowed") . '</th>
					<th>' . Mage::helper('payperrentals')->__("Products In Queue") . '</th>
					<th>' . Mage::helper('payperrentals')->__("Products Sent") . '</th>
					<th>' . Mage::helper('payperrentals')->__("Products To Send") . '</th>' . $this->deliveryDatesHeader() . '
					<th>' . Mage::helper('payperrentals')->__("Rental Queue") . '</th>
				</tr>
			</thead>
		';
        $sendItemsHtml .= '<tbody>';
        $collection = Mage::getResourceModel('sales/recurring_profile_collection')->addFieldToFilter('state', 'active')->addFieldToFilter('customer_id', array('neq' => 'null'));
        if (urldecode($this->getRequest()->getParam('store'))) {
            $collection->addFieldToFilter('store_id', $this->getRequest()->getParam('store'));
        }
        $membersArr = array();
        $customersColl = Mage::getModel('customer/customer')->getCollection()->addAttributeToSelect('*');
        foreach ($customersColl as $customer) {
            $customer_id = $customer->getId();
            $prodAllowed = Mage::helper('payperrentals/membership')->getNumberAllowedForMembershipManual($customer_id);
            if ($prodAllowed >= 1) {
                $customerArray[] = array('id' => $customer_id, 'name' => $customer->getName(), 'deliverydate' => $customer->getDeliveryDate());
            }
        }
        foreach ($collection as $coll) {
            $itemSerialized = unserialize($coll->getOrderItemInfo());
            $orderSerialized = unserialize($coll->getOrderInfo());
            //Zend_Debug::dump($orderSerialized);
            if ($itemSerialized['product_type'] == 'membershippackage') {
                $customer = Mage::getModel('customer/customer')->load($orderSerialized['customer_id']);
                $customerArray[] = array('id' => $orderSerialized['customer_id'], 'name' => $orderSerialized['customer_firstname'] . ' ' . $orderSerialized['customer_lastname'], 'deliverydate' => $customer->getDeliveryDate());
            }
        }
        foreach ($customerArray as $customer) {
            $_queueCollection = Mage::getModel('payperrentals/rentalqueue')->getCollection()->addCustomerIdFilter($customer['id'])->addSelectFilter('sendreturn_id = "0"')->addOrderFilter('sort_order ASC');
            $prodAllowed = Mage::helper('payperrentals/membership')->getNumberAllowedForMembership($customer['id']);
            $prodSent = ITwebexperts_Payperrentals_Helper_Data::getSentItemsForCustomer($customer['id']);
            $member['deliverydate'] = $customer['deliverydate'];
            $member['empty_queue'] = count($_queueCollection) == 0 ? true : false;
            $member['name'] = $customer['name'];
            $member['prodAllowed'] = $prodAllowed;
            $member['in_queue'] = count($_queueCollection);
            $member['prodSent'] = $prodSent;
            $member['tobeSent'] = $prodAllowed - $prodSent;
            $member['link'] = '<a target="_blank" href="' . Mage::getUrl('adminhtml/customer/edit/', array('id' => $customer['id'], 'tab' => 'customer_info_tabs_rentalqueue', 'key' => Mage::getSingleton('adminhtml/url')->getSecretKey('customer', 'edit'))) . '">View</a>';
            $membersArr[] = $member;
        }
        usort($membersArr, array($this, "cmp"));
        foreach ($membersArr as $member) {
            $sendItemsHtml .= '<tr' . ($member['empty_queue'] ? ' style="background:#fad0d0;"' : '') . '>';
            $sendItemsHtml .= '<td>' . ($member['empty_queue'] ? 'Yes' : 'No') . '</td>';
            $sendItemsHtml .= '<td>' . $member['name'] . '</td>';
            $sendItemsHtml .= '<td>' . $member['prodAllowed'] . '</td>';
            $sendItemsHtml .= '<td>' . $member['in_queue'] . '</td>';
            $sendItemsHtml .= '<td>' . $member['prodSent'] . '</td>';
            $sendItemsHtml .= '<td>' . $member['tobeSent'] . '</td>';
            $sendItemsHtml = $this->getDeliveryDateTableRow($sendItemsHtml, $member);
            $sendItemsHtml .= '<td>' . $member['link'] . '</td>';
            $sendItemsHtml .= '</tr>';
        }
        $sendItemsHtml .= '</tbody></table>';
        return $sendItemsHtml;
    }