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<?php
/**
 * @package	RSMembership!
 * @copyright	(c) 2009 - 2016 RSJoomla!
 * @link		https://www.rsjoomla.com
 * @license	GNU General Public License
http://www.gnu.org/licenses/gpl-3.0.en.html
 */
defined('_JEXEC') or die('Restricted access');

class RSMembershipExport 
{
	public static function buildCSV($type, $data, $fileHash = '',
$customFields = null) {
		require_once JPATH_COMPONENT.'/helpers/helper.php';
		
		$rows 	 		= '';
		if ($fileHash == '') {
		// Build header
			switch($type) {
				case 'subscribers':
					$headers = array(
						JText::_('COM_RSMEMBERSHIP_SUBSCRIBER_ID'),
						JText::_('COM_RSMEMBERSHIP_ENABLED'),
						JText::_('COM_RSMEMBERSHIP_NAME'),
						JText::_('COM_RSMEMBERSHIP_USERNAME'),
						JText::_('COM_RSMEMBERSHIP_EMAIL')
					);
					if ($customFields) {
						foreach ($customFields as $id => $properties) {
							$headers[] = JText::_($properties->label);
						}
					}
					$headers[] =
JText::_('COM_RSMEMBERSHIP_ACTIVE_SUBSCRIPTIONS');
					$headers[] =
JText::_('COM_RSMEMBERSHIP_TOTAL_SUBSCRIPTIONS');
				break;
				case 'subscriptions':
					$headers = array(
						JText::_('COM_RSMEMBERSHIP_MEMBERSHIP'),
						JText::_('COM_RSMEMBERSHIP_CATEGORY_NAME'),
						JText::_('COM_RSMEMBERSHIP_MEMBERSHIP_EXTRAS'),
						JText::_('COM_RSMEMBERSHIP_USERNAME'),
						JText::_('COM_RSMEMBERSHIP_EMAIL'),
						JText::_('COM_RSMEMBERSHIP_STATUS'),
						JText::_('COM_RSMEMBERSHIP_NOTIFIED'),
						JText::_('COM_RSMEMBERSHIP_START_DATE'),
						JText::_('COM_RSMEMBERSHIP_START_END'),
						JText::_('JPUBLISHED')
					);	
				break;
			}
			// Add header to rows
			$rows .= '"'.implode('","',
$headers).'"'."\n";
		}
		
		$cache = RSMembershipHelper::getCache();
		
		// Add the data to rows
		foreach ($data as $i => $entry) {
			$row = (array) $entry;
			switch($type) {
				case 'subscribers':
					$row['block'] = $row['block'] ?
JText::_('JNO') : JText::_('JYES');
				break;
				
				case 'subscriptions':
					if (empty($row['category_id']))
					{
						$row['category_name'] =
JText::_('COM_RSMEMBERSHIP_NO_CATEGORY');
					}
					unset($row['category_id']);
					unset($row['membership_id']);
					unset($row['id']);
					unset($row['user_id']);
					$row['membership_start'] =
RSMembershipHelper::showDate($row['membership_start']);
					$row['membership_end']   = ($row['membership_end']
!= '0000-00-00 00:00:00' ?
RSMembershipHelper::showDate($row['membership_end']) : ' -
');
					$row['notified']  		 = ($row['notified'] !=
'0000-00-00 00:00:00' ?
RSMembershipHelper::showDate($row['notified']) : ' -
');
					$row['status'] 			 =
JText::_('COM_RSMEMBERSHIP_STATUS_'.$row['status']);
					$row['published'] 		 = $row['published'] ?
JText::_('JYES') : JText::_('JNO');
					
					if ($entry->extras) {
						$row['extras'] = array();
						$entry->extras = explode(',', $entry->extras);
						foreach ($entry->extras as $value) {
							if (isset($cache->extra_values[$value])) {
								$row['extras'][] = $cache->extra_values[$value];
							}
						}
						$row['extras'] = implode(', ',
$row['extras']);
					}
				break;
			}

			array_walk($row, array('RSMembershipExport',
'fixValue'));
			
			$rows .=
'"'.implode('","',$row).'"';
			$rows .="\n";
		}
		
		return $rows;
	}

	public static function fixValue(&$string, $key)
	{
		if (strlen($string) && in_array($string[0], array('=',
'+', '-', '@')))
		{
			$string = ' ' . $string;
		}
	}
	
	public static function writeCSV($type, $query, $totalItems, $from,
$fileHash = '', $filename, $customFields = null) {
		if (!is_writable(JFactory::getConfig()->get('tmp_path'))) {
			throw new
Exception(JText::sprintf('COM_RSMEMBERSHIP_TMP_PATH_NOT_WRITABLE',
JFactory::getConfig()->get('tmp_path')));
		}
		
		$db	= JFactory::getDbo();
		$db->setQuery($query, $from, 10);
		$data = $db->loadObjectList();
		
		$fileContent = RSMembershipExport::buildCSV($type, $data, $fileHash,
$customFields);
		
		// build the file hash if not already created
		if (!$fileHash) {
			$now 		= JHtml::date('now','D, d M Y H:i:s');
			$date 		= JHtml::date('now','Y-m-d_H-i-s');
			$filename 	= $filename.'-'.$date.'.csv';
			$fileHash 	= md5($filename.$now);
		}
		
		// create or append the hashed file and put content
		if ($fileContent) {
			if (!file_put_contents(self::getTmpPath($fileHash), $fileContent,
FILE_APPEND)) {
				throw new
Exception(JText::sprintf('COM_RSMEMBERSHIP_COULD_NOT_EXPORT_CSV_PATH',
self::getTmpPath($fileHash)));
			}
		} else {
			throw new
Exception(JText::_('COM_RSMEMBERSHIP_EXPORT_NO_DATA'));
		}
		
		$newFrom 		= ($from + 10);
		$checkRemaining = $totalItems - $newFrom;
		
		return (object) array(
			'newFrom' 	=> ($checkRemaining > 0 ? $newFrom :
$totalItems),
			'fileHash'	=> $fileHash
		);
	}
	
	public static function getCSV($fileHash) {
		$file 		= self::getTmpPath($fileHash);
		$content 	= is_file($file) ? file_get_contents($file) : '';
		return $content;
	}
	
	protected static function getTmpPath($fileHash) {
		return
JFactory::getConfig()->get('tmp_path').'/'.$fileHash;
	}
	
	public static function buildCSVHeaders($filename) {
		// disable caching
		$now = JHtml::date('now','D, d M Y H:i:s');
		$date = JHtml::date('now','Y-m-d_H-i-s');
		$filename = $filename.'-'.$date.'.csv';
		
		header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
		header("Cache-Control: max-age=0, no-cache, must-revalidate,
proxy-revalidate");
		header("Last-Modified: ".$now." GMT");

		// force download  
		header("Content-Type: application/force-download");
		header("Content-Type: application/octet-stream");
		header("Content-Type: application/download");

		// disposition / encoding on response body
		header("Content-Disposition: attachment;filename=".$filename);
		header("Content-Transfer-Encoding: binary");
	}

}