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<?php

use Inpsyde\BackWPup\MsAzureDestinationConfiguration;
use MicrosoftAzure\Storage\Blob\BlobRestProxy;
use MicrosoftAzure\Storage\Blob\Models\GetBlobOptions;
use MicrosoftAzure\Storage\Common\Models\Range;

class BackWPup_Destination_MSAzure_Downloader implements BackWPup_Destination_Downloader_Interface {

/**
	 * Downloader data object.
	 *
	 * @var BackWpUp_Destination_Downloader_Data
	 */
	private $data;

/**
	 * Local file handler.
	 *
	 * @var resource
	 */
	private $local_file_handler;

/**
	 * BackWPup_Destination_MSAzure_Downloader constructor.
	 *
	 * @param BackWpUp_Destination_Downloader_Data $data Download data.
	 */
	public function __construct( BackWpUp_Destination_Downloader_Data $data ) {
		$this->data = $data;
	}

/**
	 * Download a chunk from Azure storage.
	 *
	 * @param int $start_byte Start byte offset.
	 * @param int $end_byte   End byte offset.
	 *
	 * @return void
	 * @throws RuntimeException When the source is empty or cannot be written.
	 */
	public function download_chunk( $start_byte, $end_byte ) {
		$option = new GetBlobOptions();
		$range  = new Range( $start_byte, $end_byte );
		$option->setRange( $range );

$client = $this->getBlobClient();

$blob = $client->getBlob(
			BackWPup_Option::get(
				$this->data->job_id(),
				MsAzureDestinationConfiguration::MSAZURE_CONTAINER
			),
			$this->data->source_file_path(),
			$option
		);

if ( $blob->getProperties()->getContentLength() === 0 ) {
			throw new RuntimeException(
				esc_html__( 'Could not write data to file. Empty source file.', 'backwpup' )
			);
		}

$this->setLocalFileHandler( $start_byte );

$bytes = (int) fwrite( $this->local_file_handler, stream_get_contents( $blob->getContentStream() ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fwrite
		if ( 0 === $bytes ) {
			throw new RuntimeException(
				// translators: %s = file name.
				sprintf( esc_html__( 'Could not write data to file %s.', 'backwpup' ), esc_html( $this->data->source_file_path() ) )
			);
		}
	}

/**
	 * Calculate the total file size.
	 *
	 * @return int
	 */
	public function calculate_size() {
		$client = $this->getBlobClient();

$blob_properties = $client->getBlobProperties(
			BackWPup_Option::get(
				$this->data->job_id(),
				MsAzureDestinationConfiguration::MSAZURE_CONTAINER
			),
			$this->data->source_file_path()
		);

return $blob_properties->getProperties()->getContentLength();
	}

/**
	 * Sets local_file_handler property by opening the current chunk of the resource.
	 *
	 * @param int $start_byte Start byte offset.
	 *
	 * @throws RuntimeException When the local file cannot be opened.
	 */
	private function setLocalFileHandler( $start_byte ) {
		if ( is_resource( $this->local_file_handler ) ) {
			return;
		}

$this->local_file_handler = fopen( // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fopen
			$this->data->local_file_path(),
			0 === $start_byte ? 'wb' : 'ab'
		);

if ( ! is_resource( $this->local_file_handler ) ) {
			throw new RuntimeException( esc_html__( 'File could not be opened for writing.', 'backwpup' ) );
		}
	}

/**
	 * Retrieves the service used to access the blob.
	 *
	 * @return BlobRestProxy
	 */
	private function getBlobClient() {
		$destination = new BackWPup_Destination_MSAzure();

return $destination->createBlobClient(
			BackWPup_Option::get(
				$this->data->job_id(),
				MsAzureDestinationConfiguration::MSAZURE_ACCNAME
			),
			BackWPup_Encryption::decrypt(
				BackWPup_Option::get(
					$this->data->job_id(),
					MsAzureDestinationConfiguration::MSAZURE_KEY
				)
			)
		);
	}
}

[-] class-system-tests-runner.php [edit]
[-] class-jobtype-dbdump.php [edit]
[-] class-destination-rsc.php [edit]
[-] class-encryption.php [edit]
[-] class-destination-downloader-factory.php [edit]
[-] class-destination-downloader-interface.php [edit]
[-] class-destination-ftp-type-ftp.php [edit]
[-] class-path-fixer.php [edit]
[-] class-message-box.php [edit]
[-] class-destination-dropbox-api.php [edit]
[-] class-option.php [edit]
[-] class-destination-dropbox-api-request-exception.php [edit]
[-] class-page-about.php [edit]
[-] class-migrate.php [edit]
[-] class-system-requirements.php [edit]
[-] class-adminbar.php [edit]
[-] class-msazure-destination-configuration.php [edit]
[-] class-job.php [edit]
[-] class-destination-ftp-type-exception.php [edit]
[-] class-destination-sugarsync-api.php [edit]
[-] class-download-file-interface.php [edit]
[-] class-encryption-fallback.php [edit]
[-] BackWPup.php [edit]
[-] class-page-backwpup.php [edit]
[-] class-destination-downloader-data.php [edit]
[-] class-mysqldump-exception.php [edit]
[-] class-s3-destination.php [edit]
[-] class-destination-ftp.php [edit]
[-] class-cron.php [edit]
[+] Notice
[-] class-destination-downloader.php [edit]
[-] class-destinations.php [edit]
[-] class-destination-ftp-downloader.php [edit]
[-] class-destination-dropbox-downloader.php [edit]
[-] class-download-handler.php [edit]
[-] class-destination-dropbox.php [edit]
[-] class-system-tests.php [edit]
[-] class-destination-folder-downloader.php [edit]
[-] class-destination-ftp-type.php [edit]
[-] class-thirdparties.php [edit]
[-] class-jobtype-wpplugin.php [edit]
[-] class-directory.php [edit]
[-] class-recursive-directory.php [edit]
[-] class-destination-msazure-downloader.php [edit]
[-] class-destination-connect-interface.php [edit]
[-] class-install.php [edit]
[-] class-admin.php [edit]
[-] class-jobtype-file.php [edit]
[-] functions.php [edit]
[+] Utils
[+] ThirdParty
[-] class-destination-s3-downloader.php [edit]
[-] class-destination-rsc-downloader.php [edit]
[-] class-destination-sugarsync-downloader.php [edit]
[-] class-destination-email.php [edit]
[+] ..
[-] class-mysqldump.php [edit]
[-] class-page-firstbackup.php [edit]
[-] class-jobtype-wpexp.php [edit]
[-] class-jobtype-dbcheck.php [edit]
[-] class-file.php [edit]
[-] class-sanitize-path.php [edit]
[+] Settings
[-] class-destination-s3.php [edit]
[-] class-page-logs.php [edit]
[-] class-factory-exception.php [edit]
[-] class-page-restore.php [edit]
[+] dependencies
[-] class-create-archive-exception.php [edit]
[-] class-page-editjob.php [edit]
[-] class-page-backups.php [edit]
[-] class-destination-dropbox-api-exception.php [edit]
[-] class-create-archive.php [edit]
[-] class-encryption-openssl.php [edit]
[-] class-destination-onedrive-config-trait.php [edit]
[-] class-destination-download-exception.php [edit]
[-] class-download-file.php [edit]
[-] class-page-settings.php [edit]
[-] class-destination-msazure.php [edit]
[-] class-page-onboarding.php [edit]
[-] class-destination-folder.php [edit]
[-] class-jobtypes.php [edit]
[-] class-destination-connect-exception.php [edit]
[-] class-destination-sugarsync.php [edit]
[-] class-page-jobs.php [edit]
[-] class-destination-sugarsync-api-exception.php [edit]
[-] class-encryption-mcrypt.php [edit]