/app/code/core/Mage/Downloadable/Block/Adminhtml/Catalog/Product/Edit/Tab/Downloadable/Links.php

<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magento.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magento.com for more information.
 *
 * @category    Mage
 * @package     Mage_Downloadable
 * @copyright  Copyright (c) 2006-2018 Magento, Inc. (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Adminhtml catalog product downloadable items tab links section
 *
 * @category    Mage
 * @package     Mage_Downloadable
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Downloadable_Block_Adminhtml_Catalog_Product_Edit_Tab_Downloadable_Links
    extends Mage_Uploader_Block_Single
{
    /**
     * Purchased Separately Attribute cache
     *
     * @var Mage_Catalog_Model_Resource_Eav_Attribute
     */
    protected $_purchasedSeparatelyAttribute = null;

    /**
     * Class constructor
     *
     */
    public function __construct()
    {
        parent::__construct();
        $this->setTemplate('downloadable/product/edit/downloadable/links.phtml');
        $this->setCanEditPrice(true);
        $this->setCanReadPrice(true);
    }

    /**
     * Get product that is being edited
     *
     * @return Mage_Catalog_Model_Product
     */
    public function getProduct()
    {
        return Mage::registry('product');
    }

    /**
     * Retrieve Purchased Separately Attribute object
     *
     * @return Mage_Catalog_Model_Resource_Eav_Attribute
     */
    public function getPurchasedSeparatelyAttribute()
    {
        if (is_null($this->_purchasedSeparatelyAttribute)) {
            $_attributeCode = 'links_purchased_separately';

            $this->_purchasedSeparatelyAttribute = Mage::getModel('eav/entity_attribute')
                ->loadByCode(Mage_Catalog_Model_Product::ENTITY, $_attributeCode);
        }

        return $this->_purchasedSeparatelyAttribute;
    }

    /**
     * Retrieve Purchased Separately HTML select
     *
     * @return string
     */
    public function getPurchasedSeparatelySelect()
    {
        $select = $this->getLayout()->createBlock('adminhtml/html_select')
            ->setName('product[links_purchased_separately]')
            ->setId('downloadable_link_purchase_type')
            ->setOptions(Mage::getSingleton('adminhtml/system_config_source_yesno')->toOptionArray())
            ->setValue($this->getProduct()->getLinksPurchasedSeparately());

        return $select->getHtml();
    }

    /**
     * Retrieve Add button HTML
     *
     * @return string
     */
    public function getAddButtonHtml()
    {
        $addButton = $this->getLayout()->createBlock('adminhtml/widget_button')
            ->setData(array(
                'label' => Mage::helper('downloadable')->__('Add New Row'),
                'id'    => 'add_link_item',
                'class' => 'add'
            ));
        return $addButton->toHtml();
    }

    /**
     * Retrieve default links title
     *
     * @return string
     */
    public function getLinksTitle()
    {
        return Mage::getStoreConfig(Mage_Downloadable_Model_Link::XML_PATH_LINKS_TITLE);
    }

    /**
     * Check exists defined links title
     *
     * @return bool
     */
    public function getUsedDefault()
    {
        return $this->getProduct()->getAttributeDefaultValue('links_title') === false;
    }

    /**
     * Return true if price in website scope
     *
     * @deprecated since 1.14.2.0
     * @return bool
     */
    public function getIsPriceWebsiteScope()
    {
        return Mage::helper('downloadable')->getIsPriceWebsiteScope();
    }

    /**
     * Return array of links
     *
     * @return array
     */
    public function getLinkData()
    {
        $linkArr = array();
        $links = $this->getProduct()->getTypeInstance(true)->getLinks($this->getProduct());
        $priceWebsiteScope = Mage::helper('downloadable')->getIsPriceWebsiteScope();
        foreach ($links as $item) {
            $tmpLinkItem = array(
                'link_id' => $item->getId(),
                'title' => $this->escapeHtml($item->getTitle()),
                'price' => $this->getCanReadPrice() ? $this->getPriceValue($item->getPrice()) : '',
                'number_of_downloads' => $item->getNumberOfDownloads(),
                'is_shareable' => $item->getIsShareable(),
                'link_url' => $item->getLinkUrl(),
                'link_type' => $item->getLinkType(),
                'sample_file' => $item->getSampleFile(),
                'sample_url' => $item->getSampleUrl(),
                'sample_type' => $item->getSampleType(),
                'sort_order' => $item->getSortOrder(),
            );
            $file = Mage::helper('downloadable/file')->getFilePath(
                Mage_Downloadable_Model_Link::getBasePath(), $item->getLinkFile()
            );

            if ($item->getLinkFile() && !is_file($file)) {
                Mage::helper('core/file_storage_database')->saveFileToFilesystem($file);
            }

            if ($item->getLinkFile() && is_file($file)) {
                $name = '<a href="'
                    . $this->getUrl('*/downloadable_product_edit/link', array(
                        'id' => $item->getId(),
                        '_secure' => true
                    )) . '">' . Mage::helper('downloadable/file')->getFileFromPathFile($item->getLinkFile()) . '</a>';
                $tmpLinkItem['file_save'] = array(
                    array(
                        'file' => $item->getLinkFile(),
                        'name' => $name,
                        'size' => filesize($file),
                        'status' => 'old'
                    ));
            }
            $sampleFile = Mage::helper('downloadable/file')->getFilePath(
                Mage_Downloadable_Model_Link::getBaseSamplePath(), $item->getSampleFile()
            );
            if ($item->getSampleFile() && is_file($sampleFile)) {
                $tmpLinkItem['sample_file_save'] = array(
                    array(
                        'file' => $item->getSampleFile(),
                        'name' => Mage::helper('downloadable/file')->getFileFromPathFile($item->getSampleFile()),
                        'size' => filesize($sampleFile),
                        'status' => 'old'
                    ));
            }
            if ($item->getNumberOfDownloads() == '0') {
                $tmpLinkItem['is_unlimited'] = ' checked="checked"';
            }
            if ($this->getProduct()->getStoreId() && $item->getStoreTitle()) {
                $tmpLinkItem['store_title'] = $item->getStoreTitle();
            }
            if ($this->getProduct()->getStoreId() && $priceWebsiteScope) {
                $tmpLinkItem['website_price'] = $item->getWebsitePrice();
            }
            $linkArr[] = new Varien_Object($tmpLinkItem);
        }
        return $linkArr;
    }

    /**
     * Return formated price with two digits after decimal point
     *
     * @param decimal $value
     * @return decimal
     */
    public function getPriceValue($value)
    {
        return number_format($value, 2, null, '');
    }

    /**
     * Retrieve max downloads value from config
     *
     * @return int
     */
    public function getConfigMaxDownloads()
    {
        return Mage::getStoreConfig(Mage_Downloadable_Model_Link::XML_PATH_DEFAULT_DOWNLOADS_NUMBER);
    }

    /**
     * Prepare block Layout
     *
     */
     protected function _prepareLayout()
    {
        parent::_prepareLayout();
        $this->setChild(
            'upload_button',
            $this->getLayout()->createBlock('adminhtml/widget_button')->addData(array(
                'id'      => '',
                'label'   => Mage::helper('adminhtml')->__('Upload Files'),
                'type'    => 'button',
                'onclick' => 'Downloadable.massUploadByType(\'links\');Downloadable.massUploadByType(\'linkssample\')'
            ))
        );
        $this->_addElementIdsMapping(array(
            'container' => $this->getHtmlId() . '-new',
            'delete'    => $this->getHtmlId() . '-delete'
        ));
    }

    /**
     * Retrieve Upload button HTML
     *
     * @return string
     */
    public function getUploadButtonHtml()
    {
        return $this->getChild('upload_button')->toHtml();
    }

    /**
     * Retrive config json
     *
     * @return string
     */
    public function getConfigJson($type='links')
    {

        $this->getUploaderConfig()
            ->setFileParameterName($type)
            ->setTarget(
                Mage::getModel('adminhtml/url')
                    ->addSessionParam()
                    ->getUrl('*/downloadable_file/upload', array('type' => $type, '_secure' => true))
            );
        $this->getMiscConfig()
            ->setReplaceBrowseWithRemove(true)
        ;
        return Mage::helper('core')->jsonEncode(parent::getJsonConfig());
    }

    /**
     * @return string
     */
    public function getBrowseButtonHtml($type = '')
    {
        return $this->getChild('browse_button')
            // Workaround for IE9
            ->setBeforeHtml(
                '<div style="display:inline-block; " id="downloadable_link_{{id}}_' . $type . 'file-browse">'
            )
            ->setAfterHtml('</div>')
            ->setId('downloadable_link_{{id}}_' . $type . 'file-browse_button')
            ->toHtml();
    }


    /**
     * @return string
     */
    public function getDeleteButtonHtml($type = '')
    {
        return $this->getChild('delete_button')
            ->setLabel('')
            ->setId('downloadable_link_{{id}}_' . $type . 'file-delete')
            ->setStyle('display:none; width:31px;')
            ->toHtml();
    }

    /**
     * Retrieve config object
     *
     * @deprecated
     * @return $this
     */
    public function getConfig()
    {
        return $this;
    }
}