function download_open_export_file( $filename ) {
$filepath = \PressBooks\Export\Export::getExportFolder() . $filename;
if ( ! is_readable( $filepath ) ) {
// Cannot read file
wp_die( __( 'File not found', 'pressbooks-textbook' ) . ": $filename", '', array( 'response' => 404 ) );
}
// Force download
set_time_limit( 0 );
header( 'Content-Description: File Transfer' );
header( 'Content-Type: ' . \Pressbooks\Export\Export::mimeType( $filepath ) );
header( 'Content-Disposition: attachment; filename="' . $filename . '"' );
header( 'Content-Transfer-Encoding: binary' );
header( 'Expires: 0' );
header( 'Cache-Control: must-revalidate, post-check=0, pre-check=0' );
header( 'Pragma: public' );
header( 'Content-Length: ' . filesize( $filepath ) );
@ob_clean();
flush();
while ( @ob_end_flush() ); // Fix out-of-memory problem
readfile( $filepath );
exit;
}
/**
* Truncate the exports directory, delete old files.
*
* @param int $max
*/
function truncate_exports($max)
{
$max = absint($max);
$dir = \PressBooks\Export\Export::getExportFolder();
$files = group_exports();
$i = 1;
foreach ($files as $date => $exports) {
if ($i > $max) {
foreach ($exports as $export) {
$export = realpath($dir . $export);
unlink($export);
}
}
++$i;
}
}
/**
* Scan the export directory, return latest of each file type
*
* @return array
*/
function latest_exports()
{
$suffix = array('._3.epub', '.epub', '.pdf', '.mobi', '.hpub', '.icml', '.html', '.xml');
$dir = \PressBooks\Export\Export::getExportFolder();
$files = array();
// group by extension, sort by date newest first
foreach (\PressBooks\Utility\scandir_by_date($dir) as $file) {
$ext = strstr($file, '.');
$files[$ext][] = $file;
}
// get only one of the latest of each type
$latest = array();
foreach ($suffix as $value) {
if (array_key_exists($value, $files)) {
$latest[$value] = $files[$value][0];
}
}
// @TODO filter these results against user prefs
return $latest;
}
/**
* Scan the export directory, return latest of each file type
*
* @return array
*/
function latest_exports() {
$suffix = array(
'._3.epub',
'.epub',
'.pdf',
'.mobi',
'.hpub',
'.icml',
'.html',
'.xml',
'._vanilla.xml',
'._oss.pdf',
);
$dir = \PressBooks\Export\Export::getExportFolder();
$files = array();
// group by extension, sort by date newest first
foreach ( \PressBooks\Utility\scandir_by_date( $dir ) as $file ) {
// only interested in the part of filename starting with the timestamp
preg_match( '/-\d{10,11}(.*)/', $file, $matches );
// grab the first captured parenthisized subpattern
$ext = $matches[1];
$files[$ext][] = $file;
}
// get only one of the latest of each type
$latest = array();
foreach ( $suffix as $value ) {
if ( array_key_exists( $value, $files ) ) {
$latest[$value] = $files[$value][0];
}
}
// @TODO filter these results against user prefs
return $latest;
}
<a class="btn black" href="<?php echo get_option('home'); ?>/buy"><span class="buy-icon"></span><?php _e('Buy', 'pressbooks'); ?></a>
<?php endif; ?>
</div> <!-- end .call-to-action -->
</div><!-- end .call-to-action-wrap -->
<!-- display links to files -->
<?php
$files = \PBT\Utility\latest_exports();
$options = get_option( 'pbt_redistribute_settings' );
if ( ! empty( $files ) && ( true == $options['latest_files_public'] ) ) {
echo '<div class="alt-formats">'
. '<h4>Download in the following formats:</h4>';
$dir = \PressBooks\Export\Export::getExportFolder();
foreach ( $files as $ext => $filename ) {
$file_extension = substr( strrchr( $ext, '.' ), 1 );
$pre_suffix = (false == strstr( $ext, '._3.epub' )) ? strstr( $ext, '._vanilla.xml' ) : strstr( $ext, '._3.epub' );
switch ( $file_extension ) {
case 'html':
$file_class = 'xhtml';
break;
case 'xml':
$file_class = ( false == $pre_suffix) ? 'wxr' : 'vanillawxr';
break;
case 'epub':
$file_class = ( false == $pre_suffix ) ? 'epub' : 'epub3';
break;
default:
