edd.php

	/**
	 * Constructor
	 */
	public function __construct() {

		parent::__construct( 'edd', null );

		// For consistent time-stamping
		$this->timestamp = time();

		$this->_get();

	}

	/**
	 * Listen for specific $_GET requests
	 *
	 * @return void
	 */
	public function _get() {

		// For EDD main plugin and "All Access" extension
		if ( isset( $_GET['eddfile'] ) || isset( $_GET['edd-all-access-download'] ) ) {

			add_filter( 'edd_requested_file', array( $this, 'edd_requested_file' ), 20, 4 );

		}
		// For EDD Free Downloads extension
		// Free Downloads "Auto Download" bypasses usual EDD hooks for altering files pre-download
		// Free Downloads other methods seem to use the 'edd_requested_file' hook above.
		// Without hooks we are left listening for requests

		if ( isset( $_POST['edd_free_download_id'] ) ) {

			// The only hook we seem to be able to use is 'edd_download_files' 
      // which is quite awkward for the purposes of 
			// editing some files, esp those that are remote (e.g. not abspath or url)
      // this all breaks when using with EDD S3, for example
			add_filter( 'edd_download_files', array( $this, 'edd_download_files' ), 11, 3 );

		}

	}
	
	
	/*
	 * For EDD *** Free Downloads *** extension
	 * Hooked into EDD 'edd_download_files' filter hook
	 * @todo Does not work with non-standard download URLs, e.g. Amazon S3, Dropbox - because all we get is the file stub string, not a full URL
	 *
	 * @param  array $files             $files['file'] is a URL
	 * @param  int   $download_id       e.g. WP post ID
	 * @param  int   $variable_price_id
	 * @return array $files
	 */
	public function edd_download_files( $files, $download_id, $variable_price_id ) {

		$settings = (array) get_option( 'wppdfw_admin', array() );
		$edd_global = $settings['integrate']['edd']['global'] ?? 'off';
		$edd_files = $settings['integrate']['edd']['files'] ?? array();
		$edd_file_list = [];
		if ( ! empty( $edd_files ) ) {
			// Get EDD integration admin settings list of PDFs to watermark
			$edd_file_list = array_filter( array_map( 'trim', explode( PHP_EOL, $edd_files ) ) );
		}

		// A good effort to find user's email address
		$email = '';
		if ( isset( $_POST['edd_free_download_email'] ) ) {
			$email      = sanitize_email( trim( $_POST['edd_free_download_email'] ) );
		} else if ( is_user_logged_in() ) {
			$user_id    = get_current_user_id();
			$user       = get_userdata( $user_id );
			$email      = $user->data->user_email;
		}

		// Auto/direct download will either have payment ID or download ID
		$payment_id = 0;
		if ( isset( $_GET['payment-id'] ) ) {
			$payment_id = $_GET['payment-id'];
			$uid = $_GET['payment-id'];
		} else if ( ! empty( $email ) ) { // if no payment ID maybe make a unique string with an email address
			$uid = str_replace( '.', '-', $email );
			$uid = str_replace( '@', '-', $uid  );
		} else {
			$uid = uniqid();
		}

		$this->temp_folder = $this->get_temp_folder( $uid );
		$success = false;

		foreach ( $files as $key => $file ) {

			$parsed_file_path = $this->parse_file_path( $file['file'] );
			if ( ! $this->is_pdf( $file['file'] ) && ! $parsed_file_path['remote_file'] ) {
				continue;
			}

			$filename = wp_basename( $file['file'] );

			if ( false === $parsed_file_path['remote_file'] && ! file_exists( $parsed_file_path['file_path'] ) ) {
				wppdfw_debug_log( 'Warning - EDD file ' . $filename . ' not found. PDF manipulation aborted.', 'notice' );
				continue;
			}
			if ( $parsed_file_path['remote_file'] ) {
				wppdfw_debug_log( 'Warning - EDD Free Downloads does not provide the developer with the means necessary to integrate with 3rd party file hosting such as Amazon S3 or Dropbox. Contact EDD to request they add more hooks for developers.', 'warning' );
				continue;
			}

			$file_in_list = in_array( $filename, $edd_file_list );

			$this->settings = PDFW()->settings->get_settings( 'frontend', $download_id, $key );
			// Add email to the settings array
			$this->settings['email'] = $email;

			// Is watermarking turned on for the specific download?
			$override = $this->settings['setup']['override'] ?? 'off';
			$watermark_this = $this->settings['setup']['wm_this'] ?? 'off';
			// Is PDF manipulation turned on for a specific file key?
			$key_override = $this->settings['setup'][$key]['override'] ?? 'off';
			$key_watermark_this = $this->settings['setup'][$key]['wm_this'] ?? 'off';

			// In this order, specific to general:
			if ( 'on' === $key_override && 'on' !== $key_watermark_this
				 || 'on' === $override && 'on' !== $watermark_this
				 || 'off' === $edd_global && empty( $edd_files )
				 || 'on' === $edd_global && $file_in_list
			) {
				wppdfw_debug_log( 'Notice - PDF not watermarked. Watermarking turned off for this file: ' . $filename, 'notice' );
				continue;
			}

			$this->temp_filename = $this->get_temp_filename( $filename, $uid );

			// If we aren't keeping a copy then let's add it to the cleanup queue
			if ( isset( $this->settings['housekeep']['copy'] ) && 'on' !== $this->settings['housekeep']['copy'] ) {
				// Add a unique ID ($order_id in this case) to a queue for cleanup later
				$cleanup_queue = (array) get_option( 'wppdfw_cleanup_queue', array() );
				if ( ! in_array( [ $uid, $this->temp_filename ], $cleanup_queue ) ) {
					$cleanup_queue[] = array(
						'uid' => $uid,
						'filename' => $this->temp_filename
					);
					update_option( 'wppdfw_cleanup_queue', $cleanup_queue );
					// @todo if this option gets huge, best to prune it and warn user Cron is not taking place
				}
			}

			// If recycling on and PDF exists, return that
			if ( $this->can_recycle_PDF( $uid ) ) {
				wppdfw_debug_log( 'Notice - PDF recycling attempt: ' . $filename, 'notice' );
				return $this->temp_folder . $this->temp_filename;
			}

			try {

				$this->set_content( $download_id, $email, $payment_id );

				// Do manipulation, return $file to array
				$manipulated_file = $this->send_to_library( $parsed_file_path['file_path'] );
				$files[ $key ]["file"] = get_site_url( null, '/' . str_replace( ABSPATH, '', $manipulated_file ) );

				$success = true;

			} catch ( Exception $e ) {
				if ( 'yes' === $this->settings['security']['fallback'] ) {
					continue;
				}
				wppdfw_debug_log( 'Caught exception: ' . $e->getMessage(), 'error' );
				// @todo what to do if exception thrown in this loop
				wp_die();
			}

			wppdfw_debug_log( 'Notice - PDF watermarked and delivered back to EDD [Free Downloads]: ' . $filename, 'notice' );

		}

		if ( $success ) {
			// Cleanup by PHP shutdown or Cron, depending
			$this->maybe_cleanup( $uid );
		}
		return $files;

	}