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<?php // phpcs:ignore
/**
* Snapshot models: multipart download model
*
* @package snapshot
*/
/**
* Multipart downloader class
*/
class Snapshot_Model_Transfer_Download extends Snapshot_Model_Transfer {
public function __construct( $path = false ) {
parent::__construct(
Snapshot_Model_Transfer::TYPE_DOWNLOAD,
$path
);
}
/**
* Initializes download transfer
*
* Spawns transfer parts and sets download ID.
*
* @param int $download_size File size to download.
*/
public function initialize( $download_size ) {
$parts = $this->get_transfer_parts( $download_size );
$this->set_parts( $parts );
$this->set_transfer_id( basename( $this->get_path() ) );
}
/**
* Gets a temporary file path for corresponding part
*
* @param object $part Snapshot_Model_Transfer_Part instance.
*
* @return string
*/
public function get_part_file_path( Snapshot_Model_Transfer_Part $part ) {
$path = $this->get_path();
if ( empty( $path ) ) {
return $path;
}
$fname = sprintf(
'%s---%s',
$part->get_index(), md5( $this->get_transfer_id() )
);
return trailingslashit(
wp_normalize_path( dirname( $path ) )
) . $fname;
}
/**
* Stitches together temporary files into final destination path
*
* @return bool
*/
public function stitch_temporary_files() {
$status = true;
$path = $this->get_path();
foreach ( $this->get_parts() as $part ) {
$file = $this->get_part_file_path( $part );
$index = $part->get_index();
if ( ! file_exists( $file ) || ! is_readable( $file ) ) {
// We can't deal with this file - error.
Snapshot_Helper_Log::error( "Unable to find download part {$index}" );
return false;
}
// phpcs:ignore
$status = (bool) @file_put_contents( $path, file_get_contents( $file ), FILE_APPEND );
if ( empty( $status ) ) {
// Fail stitching a part - error.
Snapshot_Helper_Log::error( "Unable to stitch download part {$index}" );
return false;
}
// phpcs:ignore
@unlink( $file );
}
return $status;
}
public function complete() {
$status = $this->stitch_temporary_files();
parent::complete();
return $status;
}
}