<?php

// DO NOT CALL THIS CLASS DIRECTLY. CALL VIA: pb_backupbuddy_destination in bootstrap.php.

class pb_backupbuddy_destination_stash { // Change class name end to match destination name.
	
	const ITXAPI_KEY = 'ixho7dk0p244n0ob';
	const ITXAPI_URL = 'http://api.ithemes.com';
	const MINIMUM_CHUNK_SIZE = 5; // Minimum size, in MB to allow chunks to be. Anything less will not be chunked even if requested.
	
	public static $destination_info = array(
		'name'			=>		'BackupBuddy Stash (v1)',
		'description'	=>		'<b>The easiest of all destinations</b>; just enter your iThemes login and Stash away! Store your backups in the BackupBuddy cloud safely with high redundancy and encrypted storage.  Supports multipart uploads for larger file support. Active BackupBuddy customers receive <b>free</b> storage! Additional storage upgrades optionally available. <a href="http://ithemes.com/backupbuddy-stash/" target="_blank">Learn more here.</a>',
		'category'		=>		'legacy', // best, normal, legacy
	);
	
	// Default settings. Should be public static for auto-merging.
	public static $default_settings = array(
		'type'						=>		'stash',	// MUST MATCH your destination slug. Required destination field.
		'title'						=>		'',			// Required destination field.
		
		'itxapi_username'			=>		'',			// Username to connect to iThemes API.
		'itxapi_password'			=>		'',			// Password (hash) to connect to iThemes API.
		
		'directory'					=>		'',			// Subdirectory to put into in addition to the site url directory.
		'ssl'						=>		'1',		// Whether or not to use SSL encryption for connecting.
		'server_encryption'			=>		'AES256',	// Encryption (if any) to have the destination enact. Empty string for none.
		'max_chunk_size'			=>		'80',		// Maximum chunk size in MB. Anything larger will be chunked up into pieces this size (or less for last piece). This allows larger files to be sent than would otherwise be possible. Minimum of 5mb allowed by S3.
		'db_archive_limit'			=>		'10',		// Maximum number of db backups for this site in this directory for this account. No limit if zero 0.
		'full_archive_limit' 		=>		'4',		// Maximum number of full backups for this site in this directory for this account. No limit if zero 0.
		'files_archive_limit' 		=>		'4',		// Maximum number of files only backups for this site in this directory for this account. No limit if zero 0.
		'manage_all_files'			=>		'1',		// Allow user to manage all files in Stash? If enabled then user can view all files after entering their password. If disabled the link to view all is hidden.
		'use_packaged_cert'			=>		'0',		// When 1, use the packaged cacert.pem file included with the AWS SDK.
		'disable_file_management'	=>		'0',		// When 1, _manage.php will not load which renders remote file management DISABLED.
		'disabled'					=>		'0',		// When 1, disable this destination.
		
		// Do not store these for destination settings. Only used to pass to functions in this file.
		'_multipart_id'				=>		'',			// Instance var. Internal use only for continuing a chunked upload.
		'_multipart_partnumber'		=>		0,			// Instance var. Part number to upload next.
		'_multipart_file'			=>		'',			// Instance var. Internal use only to store the file that is currently set to be multipart chunked.
		'_multipart_counts'			=>		array(),	// Instance var. Multipart chunks to send. Generated by S3's get_multipart_counts().
		'_multipart_upload_data'	=>		'',		// Instance var. Contains the Stash upload data returned from the Stash API upload URL. Re-used for multipart sending of parts.
		'_multipart_backup_type_dir' => '',	// Instance var. Backup type subdirectory (if any).
	);
	
	
	
	
	
	/*	send()
	 *	
	 *	Send one or more files.
	 *	
	 *	@param		array			$file			Array of one or more files to send.
	 *	@return		boolean|array					True on success, false on failure, array( multipart_id, status_text ) if a multipart chunked send.
	 */
	public static function send( $settings = array(), $file, $send_id = '', $delete_after = false, $clear_uploads = false ) {
		global $pb_backupbuddy_destination_errors;
		if ( '1' == $settings['disabled'] ) {
			$pb_backupbuddy_destination_errors[] = __( 'Error #48933: This destination is currently disabled. Enable it under this destination\'s Advanced Settings.', 'it-l10n-backupbuddy' );
			return false;
		}
		if ( is_array( $file ) ) {
			$file = $file[0];
		}
		
		pb_backupbuddy::status( 'details', 'Post-send deletion: ' . $delete_after );
		global $pb_backupbuddy_destination_errors;
		
		if ( $clear_uploads === false ) { // Uncomment the following line to override and always clear.
			//$clear_uploads = true;
		}
		
		$meta = array();
		if ( isset( $settings['meta'] ) ) {
			pb_backupbuddy::status( 'details', 'Meta setting passed. Applying to all files in this pass.' );
			$meta = $settings['meta'];
		}
		$forceRootUpload = false;
		if ( isset( $settings['forceRootUpload'] ) ) {
			$forceRootUpload = $settings['forceRootUpload'];
		}
		
		$itxapi_username = $settings['itxapi_username'];
		$itxapi_password = $settings['itxapi_password'];
		$db_archive_limit = $settings['db_archive_limit'];
		$full_archive_limit = $settings['full_archive_limit'];
		$files_archive_limit = $settings['files_archive_limit'];
		$max_chunk_size = $settings['max_chunk_size'];
		if ( ( '0' != $max_chunk_size ) && ( $max_chunk_size < self::MINIMUM_CHUNK_SIZE ) ) {
			$max_chunk_size = self::MINIMUM_CHUNK_SIZE;
			pb_backupbuddy::status( 'details', 'Setting for chunk size is below minimum limit. Increased to minimum of `' . $max_chunk_size . '` MB.' );
		}
		if ( true === $forceRootUpload ) {
			pb_backupbuddy::status( 'details', 'Forcing root upload.' );
			$remote_path = '/';
		} else {
			pb_backupbuddy::status( 'details', 'Not forcing root upload. Calculting root path.'  );
			$remote_path = self::get_remote_path( $settings['directory'] ); // Has leading and trailng slashes.
		}
		if ( $settings['ssl'] == '0' ) {
			$disable_ssl = true;
		} else {
			$disable_ssl = false;
		}
		
		$multipart_id = $settings['_multipart_id'];
		$multipart_counts = $settings['_multipart_counts'];
		
		pb_backupbuddy::status( 'details', 'Stash remote path set to `' . $remote_path . '`.' );
		
		require_once( dirname( __FILE__ ) . '/lib/class.itx_helper.php' );
		require_once( dirname( dirname( __FILE__ ) ) . '/_s3lib/aws-sdk/sdk.class.php' );
		
		// Stash API talk.
		$stash = new ITXAPI_Helper( pb_backupbuddy_destination_stash::ITXAPI_KEY, pb_backupbuddy_destination_stash::ITXAPI_URL, $itxapi_username, $itxapi_password );
		$manage_data = pb_backupbuddy_destination_stash::get_manage_data( $settings );
		if ( ! is_array( $manage_data['credentials'] ) ) {
			pb_backupbuddy::status( 'error', 'Error #8484383b: Your authentication credentials for Stash failed. Verify your login and password to Stash. You may need to update the Stash destination settings. Perhaps you recently changed your password?' );
			return false;
		}
		
		// Wipe all current uploads.
		if ( $clear_uploads === true ) {
			pb_backupbuddy::status( 'details', 'Clearing any current uploads via Stash call to `abort-all`.' );
			$abort_url = $stash->get_upload_url(null, 'abort-all');
			$request = new RequestCore($abort_url);
			try {
				$response = $request->send_request( true );
			} catch (Exception $e) {
				$error = 'Error #237836: Unable to clear Stash quota information. Details:`' . $e->getMessage() . '`.';
				pb_backupbuddy::status( 'error', $error );
				echo $error;
				return false;
	        }
		}
		
		// Process multipart transfer that we already initiated in a previous PHP load.
		if ( $multipart_id != '' ) { // Multipart upload initiated and needs parts sent.
			
			// Create S3 instance.
			pb_backupbuddy::status( 'details', 'Creating Stash S3 instance.' );
			$s3 = new AmazonS3( $settings['_multipart_upload_data']['credentials'] );    // the key, secret, token
			if ( $disable_ssl === true ) {
				@$s3->disable_ssl(true);
			}
			pb_backupbuddy::status( 'details', 'Stash S3 instance created.' );
			
			$backup_type = str_replace( '/', '', $settings['_multipart_backup_type_dir'] ); // For use later by file limiting.
			
			$this_part_number = $settings['_multipart_partnumber'] + 1;
			pb_backupbuddy::status( 'details', 'Stash beginning upload of part `' . $this_part_number . '` of `' . count( $settings['_multipart_counts'] ) . '` parts of file `' . $settings['_multipart_file'] . '` with multipart ID `' . $settings['_multipart_id'] . '`.' );
			$response = $s3->upload_part( $settings['_multipart_upload_data']['bucket'], $settings['_multipart_upload_data']['object'], $settings['_multipart_id'], array(
				'expect'     => '100-continue',
				'fileUpload' => $settings['_multipart_file'],
				'partNumber' => $this_part_number,
				'seekTo'     => (integer) $settings['_multipart_counts'][ $settings['_multipart_partnumber'] ]['seekTo'],
				'length'     => (integer) $settings['_multipart_counts'][ $settings['_multipart_partnumber'] ]['length'],
			));
			
			if(!$response->isOK()) {
				$this_error = 'Stash unable to upload file part for multipart upload `' . $settings['_multipart_id'] . '`. Details: `' . print_r( $response, true ) . '`.';
				$pb_backupbuddy_destination_errors[] = $this_error;
				pb_backupbuddy::status( 'error', $this_error );
				return false;
			} else {
				
				$uploaded_size = $response->header['_info']['size_upload'];
				$uploaded_speed = $response->header['_info']['speed_upload'];
				pb_backupbuddy::status( 'details', 'Uploaded size: ' .  pb_backupbuddy::$format->file_size( $uploaded_size ) . ', Speed: ' . pb_backupbuddy::$format->file_size( $uploaded_speed ) . '/sec.' );
				
			}
			
			
			// Load fileoptions to the send.
			pb_backupbuddy::status( 'details', 'About to load fileoptions data.' );
			require_once( pb_backupbuddy::plugin_path() . '/classes/fileoptions.php' );
			pb_backupbuddy::status( 'details', 'Fileoptions instance #5.' );
			$fileoptions_obj = new pb_backupbuddy_fileoptions( backupbuddy_core::getLogDirectory() . 'fileoptions/send-' . $send_id . '.txt', $read_only = false, $ignore_lock = false, $create_file = false );
			if ( true !== ( $result = $fileoptions_obj->is_ok() ) ) {
				pb_backupbuddy::status( 'error', __('Fatal Error #9034.8273473. Unable to access fileoptions data.', 'it-l10n-backupbuddy' ) . ' Error: ' . $result );
				return false;
			}
			pb_backupbuddy::status( 'details', 'Fileoptions data loaded.' );
			$fileoptions = &$fileoptions_obj->options;
			
			
			$update_status = 'Sent part ' . $this_part_number . ' of ' . count( $settings['_multipart_counts'] ) . '.';
			
			
			// Made it here so success sending part. Increment for next part to send.
			$settings['_multipart_partnumber']++;
			
			if ( !isset( $settings['_multipart_counts'][ $settings['_multipart_partnumber'] ] ) ) { // No more parts exist for this file. Tell S3 the multipart upload is complete and move on.
				pb_backupbuddy::status( 'details', 'Stash getting parts with etags to notify S3 of completed multipart send.' );
				$etag_parts = $s3->list_parts( $settings['_multipart_upload_data']['bucket'], $settings['_multipart_upload_data']['object'], $settings['_multipart_id'] );
				pb_backupbuddy::status( 'details', 'Stash got parts list. Details: ' . print_r( $etag_parts, true ) );
				pb_backupbuddy::status( 'details', 'Notifying S3 of multipart upload completion.' );
				$response = $s3->complete_multipart_upload( $settings['_multipart_upload_data']['bucket'], $settings['_multipart_upload_data']['object'], $settings['_multipart_id'], $etag_parts );
				if(!$response->isOK()) {
					$this_error = 'Stash unable to notify S3 of completion of all parts for multipart upload `' . $settings['_multipart_id'] . '`.';
					$pb_backupbuddy_destination_errors[] = $this_error;
					pb_backupbuddy::status( 'error', $this_error );
					return false;
				} else {
					pb_backupbuddy::status( 'details', 'Stash notified S3 of multipart completion.' );
				}
				
				$backup_type_dir = $settings['_multipart_backup_type_dir'];
				
				// Notify Stash API that things were succesful.
				$done_url = $stash->get_upload_url( $settings['_multipart_file'], 'done', $remote_path . $backup_type_dir . basename( $settings['_multipart_file'] ) );
				pb_backupbuddy::status( 'details', 'Notifying Stash of completed multipart upload with done url `' . $done_url . '`.' );
				$request = new RequestCore( $done_url );
				$response = $request->send_request(true);
				if(!$response->isOK()) {
					$this_error = 'Error #756834682. Could not finalize Stash upload. Response code: `' . $response->get_response_code() . '`; Response body: `' . $response->get_response_body() . '`; Response headers: `' . $response->get_response_header() . '`.';					$pb_backupbuddy_destination_errors[] = $this_error;
					pb_backupbuddy::status( 'error', $this_error );
					return false;
				} else { // Good server response.
					
					// See if we got an optional json response.
					$upload_data = @json_decode($response->body, true );
					if(isset($upload_data['error'])) {
						$this_error = 'Stash error(s): `' . implode( ' - ', $upload_data['error'] ) . '`.';
						$pb_backupbuddy_destination_errors[] = $this_error;
						pb_backupbuddy::status( 'error', $this_error );
						return false;
					}
										
					pb_backupbuddy::status( 'details', 'Stash success sending file `' . basename( $settings['_multipart_file'] ) . '`. File uploaded via multipart across `' . $this_part_number . '` parts and reported to Stash as completed.' );
				}
				
				pb_backupbuddy::status( 'details', 'Stash has no more parts left for this multipart upload. Clearing multipart instance variables.' );
				$settings['_multipart_partnumber'] = 0;
				$settings['_multipart_id'] = '';
				$settings['_multipart_file'] = '';
				$settings['_multipart_upload_data'] = array();
				$settings['_multipart_transferspeeds'][] = $uploaded_speed;
				
				// Overall upload speed average.
				$uploaded_speed = array_sum( $settings['_multipart_transferspeeds'] ) / count( $settings['_multipart_counts'] );
				pb_backupbuddy::status( 'details', 'Upload speed average of all chunks: `' . pb_backupbuddy::$format->file_size( $uploaded_speed ) . '`.' );
				
				$settings['_multipart_counts'] = array();
				
				// Update stats.
				$fileoptions['_multipart_status'] = $update_status;
				$fileoptions['finish_time'] = microtime(true);
				$fileoptions['status'] = 'success';
				if ( isset( $uploaded_speed ) ) {
					$fileoptions['write_speed'] = $uploaded_speed;
				}
				$fileoptions_obj->save();
				unset( $fileoptions );
			}
			
			
			
			
			
			delete_transient( 'pb_backupbuddy_stashquota_' . $settings['itxapi_username'] ); // Delete quota transient since it probably has changed now.
			
			// Schedule to continue if anything is left to upload for this multipart of any individual files.
			if ( $settings['_multipart_id'] != '' ) {
				pb_backupbuddy::status( 'details', 'Stash multipart upload has more parts left. Scheduling next part send.' );
				
				$cronTime = time();
				$cronArgs = array( $settings, $file, $send_id, $delete_after );
				$cronHashID = md5( $cronTime . serialize( $cronArgs ) );
				$cronArgs[] = $cronHashID;
				
				$schedule_result = backupbuddy_core::schedule_single_event( $cronTime, 'destination_send', $cronArgs );
				if ( true === $schedule_result ) {
					pb_backupbuddy::status( 'details', 'Next Stash chunk step cron event scheduled.' );
				} else {
					pb_backupbuddy::status( 'error', 'Next Stash chunk step cron event FAILED to be scheduled.' );
				}
				
				if ( '1' != pb_backupbuddy::$options['skip_spawn_cron_call'] ) {
					update_option( '_transient_doing_cron', 0 ); // Prevent cron-blocking for next item.
					spawn_cron( time() + 150 ); // Adds > 60 seconds to get around once per minute cron running limit.
				}
				
				$update_status = '<br>';
				$totalSent = 0;
				for( $i = 0; $i < $settings['_multipart_partnumber']; $i++ ) {
					$totalSent += $settings['_multipart_counts'][ $i ]['length'];
				}
				pb_backupbuddy::status( 'details', 'settings: ' . print_r( $settings, true ) );
				$percentSent = ceil( ( $totalSent / $settings['file_size'] ) * 100 );
				$update_status .= '<div class="backupbuddy-progressbar" data-percent="' . $percentSent . '"><div class="backupbuddy-progressbar-label"></div></div>';
				
				return array( $settings['_multipart_id'], 'Sent part ' . $this_part_number . ' of ' . count( $settings['_multipart_counts'] ) . ' parts.' . $update_status );
			}
		} else { // end if multipart continuation.
			
			
			require_once( pb_backupbuddy::plugin_path() . '/classes/fileoptions.php' );
		
			// Determine backup type directory (if zip).
			$backup_type_dir = '';
			$backup_type = '';
			if ( stristr( $file, '.zip' ) !== false ) { // If a zip try to determine backup type.
				pb_backupbuddy::status( 'details', 'Stash: Zip file. Detecting backup type if possible.' );
				$serial = backupbuddy_core::get_serial_from_file( $file );
				
				// See if we can get backup type from fileoptions data.
				pb_backupbuddy::status( 'details', 'Fileoptions instance #4.' );
				$backup_options = new pb_backupbuddy_fileoptions( backupbuddy_core::getLogDirectory() . 'fileoptions/' . $serial . '.txt', $read_only = true, $ignore_lock = true );
				if ( true !== ( $result = $backup_options->is_ok() ) ) {
					pb_backupbuddy::status( 'error', 'Unable to open fileoptions file `' . backupbuddy_core::getLogDirectory() . 'fileoptions/' . $serial . '.txt' . '`.' );
				} else {
					if ( isset( $backup_options->options['integrity']['detected_type'] ) ) {
						pb_backupbuddy::status( 'details', 'Stash: Detected backup type as `' . $backup_options->options['integrity']['detected_type'] . '` via integrity check data.' );
						$backup_type_dir = $backup_options->options['integrity']['detected_type'] . '/';
						$backup_type = $backup_options->options['integrity']['detected_type'];
					}
				}
				
				// If still do not know backup type then attempt to deduce it from filename.
				if ( $backup_type == '' ) {
					if ( stristr( $file, '-db-' ) !== false ) {
						pb_backupbuddy::status( 'details', 'Stash: Detected backup type as `db` via filename.' );
						$backup_type_dir = 'db/';
						$backup_type = 'db';
					} elseif ( stristr( $file, '-full-' ) !== false ) {
						pb_backupbuddy::status( 'details', 'Stash: Detected backup type as `full` via filename.' );
						$backup_type_dir = 'full/';
						$backup_type = 'full';
					} elseif ( stristr( $file, '-files-' ) !== false ) {
						pb_backupbuddy::status( 'details', 'Stash: Detected backup type as `files` via filename.' );
						$backup_type_dir = 'files/';
						$backup_type = 'files';
					} else {
						pb_backupbuddy::status( 'details', 'Stash: Could not detect backup type via integrity details nor filename.' );
					}
				}
			}
			
			// Interact with Stash API.
			pb_backupbuddy::status( 'details', 'Determining Stash upload URL for `' . $file . '`.` with destination remote path `' . $remote_path . $backup_type_dir . basename( $file ) . '`.' );
			$upload_url = $stash->get_upload_url( $file, 'request', $remote_path . $backup_type_dir . basename( $file ) );
			pb_backupbuddy::status( 'details', 'Determined upload url: `' . $upload_url . '`.' );
			$request = new RequestCore( $upload_url );
			pb_backupbuddy::status( 'details', 'Sending Stash API request.' );
			$response = $request->send_request( true );
			
			// Validate response.
			if(!$response->isOK()) {
				$this_error = 'Stash request for upload credentials failed.';
				$pb_backupbuddy_destination_errors[] = $this_error;
				pb_backupbuddy::status( 'error', $this_error );
				return false;
			}
			if(!$upload_data = json_decode($response->body, true)) {
				$this_error = 'Stash API did not give a valid JSON response.';
				$pb_backupbuddy_destination_errors[] = $this_error;
			    pb_backupbuddy::status( 'error', $this_error );
				return false;
			}
			if(isset($upload_data['error'])) {
				$this_error = 'Stash error(s): `' . implode( ' - ', $upload_data['error'] ) . '`.';
				$pb_backupbuddy_destination_errors[] = $this_error;
				pb_backupbuddy::status( 'error', $this_error );
				return false;
			}
			
			
			// Create S3 instance.
			pb_backupbuddy::status( 'details', 'Creating Stash S3 instance.' );
			$s3 = new AmazonS3( $upload_data['credentials'] );    // the key, secret, token
			if ( $disable_ssl === true ) {
				@$s3->disable_ssl(true);
			}
			pb_backupbuddy::status( 'details', 'Stash S3 instance created.' );
			
			
			// Handle chunking of file into a multipart upload (if applicable).
			$file_size = filesize( $file );
			if ( ( $max_chunk_size >= self::MINIMUM_CHUNK_SIZE ) && ( ( $file_size / 1024 / 1024 ) > $max_chunk_size ) ) { // minimum chunk size is 5mb. Anything under 5mb we will not chunk.
				
				pb_backupbuddy::status( 'details', 'Stash file size of ' . pb_backupbuddy::$format->file_size( $file_size ) . ' exceeds max chunk size of ' . $max_chunk_size . 'MB set in settings for sending file as multipart upload.' );
				// Initiate multipart upload with S3.
				pb_backupbuddy::status( 'details', 'Initiating Stash multipart upload.' );
				$response = $s3->initiate_multipart_upload(
					$upload_data['bucket'],
					$upload_data['object'],
					array(
						'encryption' => 'AES256',
						'meta'       => $meta,
					)
				);
				
				if(!$response->isOK()) {
					$this_error = 'Stash was unable to initiate multipart upload.';
					$pb_backupbuddy_destination_errors[] = $this_error;
					pb_backupbuddy::status( 'error', $this_error );
					return false;
				} else {
					$upload_id = (string) $response->body->UploadId;
					pb_backupbuddy::status( 'details', 'Stash initiated multipart upload with ID `' . $upload_id . '`.' );
				}
				
				// Get chunk parts for multipart transfer.
				pb_backupbuddy::status( 'details', 'Stash getting multipart counts.' );
				$parts = $s3->get_multipart_counts( $file_size, $max_chunk_size * 1024 * 1024 ); // Size of chunks expected to be in bytes.
				
				$multipart_destination_settings = $settings;
				$multipart_destination_settings['_multipart_id'] = $upload_id;
				$multipart_destination_settings['_multipart_partnumber'] = 0;
				$multipart_destination_settings['_multipart_file'] = $file;
				$multipart_destination_settings['_multipart_counts'] = $parts;
				$multipart_destination_settings['_multipart_upload_data'] = $upload_data;
				$multipart_destination_settings['_multipart_backup_type_dir'] = $backup_type_dir;
				$multipart_destination_settings['file_size'] = $file_size;
								
				pb_backupbuddy::status( 'details', 'Stash multipart settings to pass:' . print_r( $multipart_destination_settings, true ) );
				
				// Schedule to process the parts.
				pb_backupbuddy::status( 'details', 'Stash scheduling send of next part(s). File: ' . $file );
				
				$cronTime = time();
				$cronArgs = array( $multipart_destination_settings, $file, $send_id, $delete_after );
				$cronHashID = md5( $cronTime . serialize( $cronArgs ) );
				$cronArgs[] = $cronHashID;
				
				backupbuddy_core::schedule_single_event( $cronTime, 'destination_send', $cronArgs );
				
				if ( '1' != pb_backupbuddy::$options['skip_spawn_cron_call'] ) {
					update_option( '_transient_doing_cron', 0 ); // Prevent cron-blocking for next item.
					spawn_cron( time() + 150 ); // Adds > 60 seconds to get around once per minute cron running limit.
				}
				
				pb_backupbuddy::status( 'details', 'Stash scheduled send of next part(s). Done for this cycle.' );
				
				return array( $upload_id, 'Starting send of ' . count( $multipart_destination_settings['_multipart_counts'] ) . ' parts.' );
			} else { // did not meet chunking criteria.
				if ( $max_chunk_size != '0' ) {
					if ( ( $file_size / 1024 / 1024 ) < self::MINIMUM_CHUNK_SIZE ) {
						pb_backupbuddy::status( 'details', 'File size of ' . pb_backupbuddy::$format->file_size( $file_size ) . ' is less than the minimum allowed chunk size of ' . self::MINIMUM_CHUNK_SIZE . 'MB; not chunking into multipart upload.' );
					} else {
						pb_backupbuddy::status( 'details', 'File size of ' . pb_backupbuddy::$format->file_size( $file_size ) . ' is less than your chunk size setting of ' . $max_chunk_size . ' MB; not chunking into multipart upload.' );
					}
				} else {
					pb_backupbuddy::status( 'details', 'Max chunk size set to zero so not chunking into multipart upload.' );
				}
			}
			
			
			// SEND file.
			if ( ( ! @file_exists( $file ) ) || ( @is_dir( $file ) ) ) {
				pb_backupbuddy::status( 'error', 'Error #848344: File to send, `' . $file . '`, does not exist or unreadable. It cannot be a directory.' );
				return false;
			}
			pb_backupbuddy::status( 'details', 'About to put (upload) object to Stash. File: `' . $file . '`.' );
			pb_backupbuddy::status( 'details', 'Meta: ' . print_r( $meta, true ) );
			$response = $s3->create_object(
				$upload_data['bucket'],
				$upload_data['object'],
				array(
					'fileUpload' => $file,
					'encryption' => 'AES256',
					'meta'       => $meta,
				)
			);
			
			
			// Validate response. On failure notify Stash API that things went wrong.
			if(!$response->isOK()) { // Send FAILED.
				
				pb_backupbuddy::status( 'details', 'Failure uploading file to Stash storage. Notifying Stash API next. Upload details: `' . print_r( $response, true ) . '`.' );
				pb_backupbuddy::status( 'details', 'Sending upload abort to `' . $abort_url . '`.' );
				$request = new RequestCore($abort_url);
				$response = $request->send_request(true);
				
				$this_error = 'Could not upload to Stash, attempt aborted.';
				$pb_backupbuddy_destination_errors[] = $this_error;
				pb_backupbuddy::status( 'error', $this_error );
				return false;
				
			} else { // Send SUCCESS.
				
				pb_backupbuddy::status( 'details', 'Success uploading file to Stash storage. Notifying Stash API next. Upload details: `' . print_r( $response, true ) . '`.' );
				
				$uploaded_size = $response->header['_info']['size_upload'];
				$uploaded_speed = $response->header['_info']['speed_upload'];
				pb_backupbuddy::status( 'details', 'Uploaded size: ' .  pb_backupbuddy::$format->file_size( $uploaded_size ) . ', Speed: ' . pb_backupbuddy::$format->file_size( $uploaded_speed ) . '/sec.' );
				
			}
			
			
			delete_transient( 'pb_backupbuddy_stashquota_' . $settings['itxapi_username'] ); // Delete quota transient since it probably has changed now.
			
			// Notify Stash API that things were succesful.
			$done_url = $stash->get_upload_url( $file, 'done', $remote_path . $backup_type_dir . basename( $file ) );
			pb_backupbuddy::status( 'details', 'Notifying Stash of completed upload with done url `' . $done_url . '`.' );
			$request = new RequestCore( $done_url );
			$response = $request->send_request(true);
			if(!$response->isOK()) {
				$this_error = 'Error #247568834682. Could not finalize Stash upload. Response code: `' . $response->get_response_code() . '`; Response body: `' . $response->get_response_body() . '`; Response headers: `' . $response->get_response_header() . '`.';
				$pb_backupbuddy_destination_errors[] = $this_error;
				pb_backupbuddy::status( 'error', $this_error );
				return false;
			} else { // Good server response.
				
				// See if we got an optional json response.
				$upload_data = @json_decode($response->body, true );
				if(isset($upload_data['error'])) { // Some kind of error.
					$this_error = 'Stash error(s): `' . implode( ' - ', $upload_data['error'] ) . '`.';
					$pb_backupbuddy_destination_errors[] = $this_error;
					pb_backupbuddy::status( 'error', $this_error );
					return false;
				}
				
				pb_backupbuddy::status( 'details', 'Stash success sending file `' . basename( $file ) . '`. File uploaded and reported to Stash as completed.' );
				
				// Load destination fileoptions.
				pb_backupbuddy::status( 'details', 'About to load fileoptions data.' );
				require_once( pb_backupbuddy::plugin_path() . '/classes/fileoptions.php' );
				pb_backupbuddy::status( 'details', 'Fileoptions instance #3.' );
				$fileoptions_obj = new pb_backupbuddy_fileoptions( backupbuddy_core::getLogDirectory() . 'fileoptions/send-' . $send_id . '.txt', $read_only = false, $ignore_lock = false, $create_file = false );
				if ( true !== ( $result = $fileoptions_obj->is_ok() ) ) {
					pb_backupbuddy::status( 'error', __('Fatal Error #9034.84838. Unable to access fileoptions data.', 'it-l10n-backupbuddy' ) . ' Error: ' . $result );
					return false;
				}
				pb_backupbuddy::status( 'details', 'Fileoptions data loaded.' );
				$fileoptions = &$fileoptions_obj->options;
				
				// Save stats.
				if ( isset( $uploaded_speed ) ) {
					$fileoptions['write_speed'] = $uploaded_speed;
					$fileoptions_obj->save();
				}
				//$fileoptions['finish_time'] = time();
				//$fileoptions['status'] = 'success';
				unset( $fileoptions_obj );
				
				
			} // end foreach.
		} // End not multipart continuation.
		
		// BEGIN FILE LIMIT PROCESSING. Enforce archive limits if applicable.
		if ( $backup_type == 'full' ) {
			$limit = $full_archive_limit;
			pb_backupbuddy::status( 'details', 'Stash full backup archive limit of `' . $limit . '` of type `full` based on destination settings.' );
		} elseif ( $backup_type == 'db' ) {
			$limit = $db_archive_limit;
			pb_backupbuddy::status( 'details', 'Stash database backup archive limit of `' . $limit . '` of type `db` based on destination settings.' );
		} elseif ( $backup_type == 'files' ) {
			$limit = $files_archive_limit;
			pb_backupbuddy::status( 'details', 'Stash database backup archive limit of `' . $limit . '` of type `files` based on destination settings.' );
		} else {
			$limit = 0;
			pb_backupbuddy::status( 'warning', 'Warning #54854895. Stash was unable to determine backup type (reported: `' . $backup_type . '`) so archive limits NOT enforced for this backup.' );
		}
		if ( $limit > 0 ) {
			
			pb_backupbuddy::status( 'details', 'Stash archive limit enforcement beginning.' );
			// S3 object for managing files.
			$s3_manage = new AmazonS3( $manage_data['credentials'] );
			if ( $disable_ssl === true ) {
				@$s3_manage->disable_ssl(true);
			}
			
			// Get file listing.
			$response_manage = $s3_manage->list_objects($manage_data['bucket'], array('prefix'=> $manage_data['subkey'] . $remote_path . $backup_type_dir ));     // list all the files in the subscriber account
			
			// Create array of backups and organize by date
			$prefix = backupbuddy_core::backup_prefix();
			
			// List backups associated with this site by date.
			$backups = array();
			foreach( $response_manage->body->Contents as $object ) {
				
				$file = str_replace( $manage_data['subkey'] . $remote_path . $backup_type_dir, '', $object->Key );
				// Stash stores files in a directory per site so no need to check prefix here! if ( false !== strpos( $file, 'backup-' . $prefix . '-' ) ) { // if backup has this site prefix...
				$backups[$file] = strtotime( $object->LastModified );
			
			}
			arsort( $backups );
			
			
			pb_backupbuddy::status( 'details', 'Stash found `' . count( $backups ) . '` backups of this type when checking archive limits.' );
			if ( ( count( $backups ) ) > $limit ) {
				pb_backupbuddy::status( 'details', 'More archives (' . count( $backups ) . ') than limit (' . $limit . ') allows. Trimming...' );
				$i = 0;
				$delete_fail_count = 0;
				foreach( $backups as $buname => $butime ) {
					$i++;
					if ( $i > $limit ) {
						pb_backupbuddy::status ( 'details', 'Trimming excess file `' . $buname . '`...' );
						$response = $s3_manage->delete_object( $manage_data['bucket'], $manage_data['subkey'] . $remote_path . $backup_type_dir . $buname );
						if ( !$response->isOK() ) {
							pb_backupbuddy::status( 'details',  'Unable to delete excess Stash file `' . $buname . '`. Details: `' . print_r( $response, true ) . '`.' );
							$delete_fail_count++;
						}
					}
				}
				pb_backupbuddy::status( 'details', 'Finished trimming excess backups.' );
				if ( $delete_fail_count !== 0 ) {
					$error_message = 'Stash remote limit could not delete ' . $delete_fail_count . ' backups.';
					pb_backupbuddy::status( 'error', $error_message );
					backupbuddy_core::mail_error( $error_message );
				}
			}
			
			pb_backupbuddy::status( 'details', 'Stash completed archive limiting.' );
			
		} else {
			pb_backupbuddy::status( 'details',  'No Stash archive file limit to enforce.' );
		} // End remote backup limit
		
		
		if ( isset( $fileoptions_obj ) ) {
			unset( $fileoptions_obj );
		}
		// END FILE LIMIT PROCESSING.
		
		
		// Success if we made it this far.
		return true;
		
	} // End send().
	
	
	
	public static function test( $settings ) {
		
		$remote_path = self::get_remote_path( $settings['directory'] ); // Has leading and trailng slashes.
		
		$manage_data = pb_backupbuddy_destination_stash::get_manage_data( $settings );
		if ( ! is_array( $manage_data['credentials'] ) ) { // Credentials were somehow faulty. User changed password after prior page? Unlikely but you never know...
			$error_msg = 'Error #8484383c: Your authentication credentials for Stash failed. Verify your login and password to Stash. You may need to update the Stash destination settings. Perhaps you recently changed your password?';
			pb_backupbuddy::status( 'error', $error_msg );
			return $error_msg;
		}
		
		// Try sending a file.
		$send_response = pb_backupbuddy_destinations::send( $settings, dirname( dirname( __FILE__ ) ) . '/remote-send-test.php', $send_id = 'TEST-' . pb_backupbuddy::random_string( 12 ) ); // 3rd param true forces clearing of any current uploads.
		if ( false === $send_response ) {
			$send_response = 'Error sending test file to Stash.';
		} else {
			$send_response = 'Success.';
		}
		
		// S3 object for managing files.
		$s3_manage = new AmazonS3( $manage_data['credentials'] );
		if ( $settings['ssl'] == 0 ) {
			@$s3_manage->disable_ssl(true);
		}
		
		// Delete sent file.
		$delete_response = 'Success.';
		$delete_response = $s3_manage->delete_object( $manage_data['bucket'], $manage_data['subkey'] . $remote_path . 'remote-send-test.php' );
		if ( !$delete_response->isOK() ) {
			$delete_response = 'Unable to delete test Stash file `remote-send-test.php`. Details: `' . print_r( $response, true ) . '`.';
			pb_backupbuddy::status( 'details', $delete_response );
		} else {
			$delete_response = 'Success.';
		}
		
		// Load destination fileoptions.
		pb_backupbuddy::status( 'details', 'About to load fileoptions data.' );
		require_once( pb_backupbuddy::plugin_path() . '/classes/fileoptions.php' );
		pb_backupbuddy::status( 'details', 'Fileoptions instance #2.' );
		$fileoptions_obj = new pb_backupbuddy_fileoptions( backupbuddy_core::getLogDirectory() . 'fileoptions/send-' . $send_id . '.txt', $read_only = false, $ignore_lock = false, $create_file = false );
		if ( true !== ( $result = $fileoptions_obj->is_ok() ) ) {
			pb_backupbuddy::status( 'error', __('Fatal Error #9034.84838. Unable to access fileoptions data.', 'it-l10n-backupbuddy' ) . ' Error: ' . $result );
			return false;
		}
		pb_backupbuddy::status( 'details', 'Fileoptions data loaded.' );
		$fileoptions = &$fileoptions_obj->options;
		
		if ( ( 'Success.' != $send_response ) || ( 'Success.' != $delete_response ) ) {
			$fileoptions['status'] = 'failure';
			
			$fileoptions_obj->save();
			unset( $fileoptions_obj );
			
			return 'Send details: `' . $send_response . '`. Delete details: `' . $delete_response . '`.';
		} else {
			$fileoptions['status'] = 'success';
			$fileoptions['finish_time'] = microtime(true);
		}
		
		$fileoptions_obj->save();
		unset( $fileoptions_obj );
		
		return true;
		
	} // End test().
	
	
	
	/* get_quota()
	 *
	 * Get Stash quota.
	 *
	 */
	public static function get_quota( $settings, $bypass_cache = false ) {
		
		
		$cache_time = 60*5; // 5 minutes.
		
		if ( $bypass_cache == false ) {
			$transient = get_transient( 'pb_backupbuddy_stashquota_' . $settings['itxapi_username'] );
			if ( $transient !== false ) {
				pb_backupbuddy::status( 'details', 'Stash quota information CACHED. Returning cached version.' );
				return $transient;
			}
		} else {
			pb_backupbuddy::status( 'details', 'Stash bypassing cached quota information. Getting new values.' );
		}
				
		$itxapi_username = $settings['itxapi_username'];
		$itxapi_password = $settings['itxapi_password'];
		
		pb_backupbuddy::status( 'details', 'Loading ITX helper file.' );
		require_once( dirname( __FILE__ ) . '/lib/class.itx_helper.php' );
		pb_backupbuddy::status( 'details', 'Loading AWS SDK file for quota.' );
		require_once( dirname( dirname( __FILE__ ) ) . '/_s3lib/aws-sdk/sdk.class.php' );
		
		$stash = new ITXAPI_Helper( pb_backupbuddy_destination_stash::ITXAPI_KEY, pb_backupbuddy_destination_stash::ITXAPI_URL, $itxapi_username, $itxapi_password );
		
		$quota_url = $stash->get_quota_url();
		
		pb_backupbuddy::status( 'details', 'RequestCore getting quota.' );
		$request = new RequestCore( $quota_url );
        try {
        	$response = $request->send_request(true);
		} catch (Exception $e) {
			$error = 'Error #32897329: Unable to get Stash quota information. Details:`' . $e->getMessage() . '`.';
			pb_backupbuddy::status( 'error', $error );
			echo $error;
			return false;
        }
        
		// See if the request was successful.
		if(!$response->isOK())
			pb_backupbuddy::status( 'error', 'Stash request for quota failed.' );
		
		// See if we got a json response.
        if(!$quota_data = json_decode($response->body, true))
			pb_backupbuddy::status( 'error', 'Stash did not get valid json response.' );
        
		// Finally see if the API returned an error.
		if(isset($quota_data['error'])) {            
            if ( $quota_data['error']['code'] == '3002' ) {
            	echo 'Invalid iThemes.com Member account password. Please re-authenticate to Stash from the Remote Destination Settings page.';
            	return false;
            } else {
            	global $pb_backupbuddy_destination_errors;
            	$pb_backupbuddy_destination_errors[] = implode( ', ', $quota_data['error'] );
				pb_backupbuddy::status( 'error', 'Stash quota error: ' . implode( ', ', $quota_data['error'] ) );
			}
			
            return false;
        }
		
		set_transient( 'pb_backupbuddy_stashquota_' . $settings['itxapi_username'], $quota_data, $cache_time );
		
		return $quota_data;
	} // End get_quota().
	
	
	
	/*	get_manage_data()
	 *	
	 *	Get the required credentials and management data for managing user files.
	 *	
	 *	@param		array	$settings		Destination settings.
	 *	@param		bool	$hideAuthAlert	Default: false. Whether or not to suppress an alert box if authentication is failing. Useful for showing a more friendly message for that common error, or a re-auth form.
	 *	@return		false|array				Boolean false on failure. Array of data on success.
	 */
	public static function get_manage_data( $settings, $suppressAuthAlert = false ) {
		
		$itxapi_username = $settings['itxapi_username'];
		$itxapi_password = $settings['itxapi_password'];
		
		require_once( dirname( __FILE__ ) . '/lib/class.itx_helper.php' );
		require_once( dirname( dirname( __FILE__ ) ) . '/_s3lib/aws-sdk/sdk.class.php' );
		
		$stash = new ITXAPI_Helper( pb_backupbuddy_destination_stash::ITXAPI_KEY, pb_backupbuddy_destination_stash::ITXAPI_URL, $itxapi_username, $itxapi_password );
		
		
		//  get the url to use to request management credentials
		//  url looks something like this - http://api.ithemes.com/stash/upload?apikey=sb31kesem0c879m0&expires=1347439653&subscriber=jwooley&signature=VFMbmXb5OorWwqE0iedOCsDtSgs%3D
		$manage_url = $stash->get_manage_url();
		            
		//  create a new RequestCore to get the credentials
		//  NOTE: RequestCore is part of the AWS SDK, it's a generic http request class.
		//        You can use any available function to make the api request, the wordpress http class for example,
		//        or even just the basic file_get_contents()
		
		$request = new RequestCore($manage_url);
		
		//  send the api request
		try {
			$response = $request->send_request(true);
		} catch (Exception $e) {
			$error = 'Error #23873631: Unable to initiate Stash request. Details:`' . $e->getMessage() . '`.';
			pb_backupbuddy::status( 'error', $error );
			echo $error;
			return false;
        }
        
		//  see if the request was successful
		if(!$response->isOK()) {
			//throw new Exception('Request for management credentials failed.');
			$error = 'Request for management credentials failed.';
			pb_backupbuddy::status( 'error', $error );
			pb_backupbuddy::alert( $error );
			return false;
		}
		
		//  see if we got a json response
		if(!$manage_data = json_decode($response->body, true)) {
			$error = 'Did not get valid JSON response.';
			pb_backupbuddy::status( 'error', $error );
			pb_backupbuddy::alert( $error );
			return false;
		}
		
		//  finally see if the API returned an error
		if(isset($manage_data['error'])) {
			$error = 'Error: ' . implode(' - ', $manage_data['error']);
			pb_backupbuddy::status( 'error', $error );
			if ( ( true === $suppressAuthAlert ) && ( '3002' == $manage_data['error']['code'] ) ) {
				// Alert suppressed.
			} else {
				pb_backupbuddy::alert( $error );
			}
			return false;
		}
		
		if ( '1' == $settings['use_packaged_cert'] ) {
			pb_backupbuddy::status( 'details', 'Using packaged cacert.pem file based on destination settings.' );
			$manage_data['ssl.certificate_authority'] = pb_backupbuddy::plugin_path() . '/destinations/_s3lib/aws-sdk/lib/requestcore/cacert.pem';
		}
		
		return $manage_data;
	} // End get_manage_data().
	
	
	
	/*	get_remote_path()
	 *	
	 *	Returns the site-specific remote path to store into.
	 *	Slashes (caused by subdirectories in url) are replaced with underscores.
	 *	Always has a leading and trailing slash.
	 *	
	 *	@return		string			Ex: /dustinbolton.com_blog/
	 */
	public static function get_remote_path( $directory = '' ) {
		
		$remote_path = site_url();
		$remote_path = str_ireplace( 'http://', '', $remote_path );
		$remote_path = str_ireplace( 'https://', '', $remote_path );
		
		//$remote_path = preg_replace('/[^\da-z]/i', '_', $remote_path );
		
		$remote_path = str_ireplace( '/', '_', $remote_path );
		$remote_path = str_ireplace( '~', '_', $remote_path );
		$remote_path = str_ireplace( ':', '_', $remote_path );
		
		$remote_path = '/' . trim( $remote_path, '/\\' ) . '/';
		
		$directory = trim( $directory, '/\\' );
		if ( $directory != '' ) {
			$remote_path .= $directory . '/';
		}
		
		return $remote_path;
		
	} // End get_remote_path().
	
	
	
	
	/*	get_quota_bar()
	 *	
	 *	Returns the progress quota bar showing usage.
	 *	
	 *	@return		string			HTML for the quota bar.
	 */
	public static function get_quota_bar( $account_info ) {
		//echo '<pre>' . print_r( $account_info, true ) . '</pre>';
		
		$return = '';
		$return .= '
		<style>
			.outer_progress {
				-moz-border-radius: 4px;
				-webkit-border-radius: 4px;
				-khtml-border-radius: 4px;
				border-radius: 4px;
				
				border: 1px solid #DDD;
				background: #EEE;
				
				max-width: 700px;
				
				margin-left: auto;
				margin-right: auto;
				
				height: 30px;
			}
			
			.inner_progress {
				border-right: 1px solid #85bb3c;
				background: #8cc63f url("' . pb_backupbuddy::plugin_url() . '/destinations/stash/progress.png") 50% 50% repeat-x;
				
				height: 100%;
			}
			
			.progress_table {
				color: #5E7078;
				font-family: "Open Sans", Arial, Helvetica, Sans-Serif;
				font-size: 14px;
				line-height: 20px;
				text-align: center;
				
				margin-left: auto;
				margin-right: auto;
				margin-bottom: 20px;
			}
		</style>';
		
		if ( isset( $account_info['quota_warning'] ) && ( $account_info['quota_warning'] != '' ) ) {
			//echo '<div style="color: red; max-width: 700px; margin-left: auto; margin-right: auto;"><b>Warning</b>: ' . $account_info['quota_warning'] . '</div><br>';
		}
		
		$return .= '
		<div class="outer_progress">
			<div class="inner_progress" style="width: ' . $account_info['quota_used_percent'] . '%"></div>
		</div>
		
		<table align="center" class="progress_table">
			<tbody><tr align="center">
			    <td style="width: 10%; font-weight: bold; text-align: center">Free Tier</td>
			    <td style="width: 10%; font-weight: bold; text-align: center">Paid Tier</td>        
			    <td style="width: 10%"></td>
			    <td style="width: 10%; font-weight: bold; text-align: center">Total</td>
			    <td style="width: 10%; font-weight: bold; text-align: center">Used</td>
			    <td style="width: 10%; font-weight: bold; text-align: center">Available</td>        
			</tr>

			<tr align="center">
			    <td style="text-align: center">' . $account_info['quota_free_nice'] . '</td>
			    <td style="text-align: center">';
			    if ( $account_info['quota_paid'] == '0' ) {
			    	$return .= 'none';
			    } else {
			    	$return .= $account_info['quota_paid_nice'];
			    }
			    $return .= '</td>
			    <td></td>
			    <td style="text-align: center">' . $account_info['quota_total_nice'] . '</td>
			    <td style="text-align: center">' . $account_info['quota_used_nice'] . '</td>
			    <td style="text-align: center">' . $account_info['quota_available_nice'] . '</td>
			</tr>
			';
		$return .= '
		</tbody></table>';
		
		return $return;
		
	} // End get_quota_bar().
	
} // End class.