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. /** * Base class for dataformat. * * @package core * @subpackage dataformat * @copyright 2016 Brendan Heywood (brendan@catalyst-au.net) * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ namespace core\dataformat; /** * Base class for dataformat. * * @package core * @subpackage dataformat * @copyright 2016 Brendan Heywood (brendan@catalyst-au.net) * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ abstract class base { /** @var $mimetype */ protected $mimetype = "text/plain"; /** @var $extension */ protected $extension = ".txt"; /** @var $filename */ protected $filename = ''; /** * Get the file extension * * @return string file extension */ public function get_extension() { return $this->extension; } /** * Set download filename base * * @param string $filename */ public function set_filename($filename) { $this->filename = $filename; } /** * Set the title of the worksheet inside a spreadsheet * * For some formats this will be ignored. * * @param string $title */ public function set_sheettitle($title) { } /** * Output file headers to initialise the download of the file. */ public function send_http_headers() { if (defined('BEHAT_SITE_RUNNING')) { // For text based formats - we cannot test the output with behat if we force a file download. return; } if (is_https()) { // HTTPS sites - watch out for IE! KB812935 and KB316431. header('Cache-Control: max-age=10'); header('Pragma: '); } else { // Normal http - prevent caching at all cost. header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0'); header('Pragma: no-cache'); } header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT'); header("Content-Type: $this->mimetype\n"); $filename = $this->filename . $this->get_extension(); header("Content-Disposition: attachment; filename=\"$filename\""); } /** * Write the start of the file. */ public function start_output() { // Override me if needed. } /** * Write the start of the sheet we will be adding data to. * * @param array $columns */ public function start_sheet($columns) { // Override me if needed. } /** * Write a single record * * @param array $record * @param int $rownum */ abstract public function write_record($record, $rownum); /** * Write the end of the sheet containing the data. * * @param array $columns */ public function close_sheet($columns) { // Override me if needed. } /** * Write the end of the file. */ public function close_output() { // Override me if needed. } }