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<?php /** * Handles CSV export. * * @package WooCommerce\Export * @version 3.1.0 */ if ( ! defined( 'ABSPATH' ) ) { exit; } /** * WC_CSV_Exporter Class. */ abstract class WC_CSV_Exporter { /** * Type of export used in filter names. * * @var string */ protected $export_type = ''; /** * Filename to export to. * * @var string */ protected $filename = 'wc-export.csv'; /** * Batch limit. * * @var integer */ protected $limit = 50; /** * Number exported. * * @var integer */ protected $exported_row_count = 0; /** * Raw data to export. * * @var array */ protected $row_data = array(); /** * Total rows to export. * * @var integer */ protected $total_rows = 0; /** * Columns ids and names. * * @var array */ protected $column_names = array(); /** * List of columns to export, or empty for all. * * @var array */ protected $columns_to_export = array(); /** * The delimiter parameter sets the field delimiter (one character only). * * @var string */ protected $delimiter = ','; /** * Prepare data that will be exported. */ abstract public function prepare_data_to_export(); /** * Return an array of supported column names and ids. * * @since 3.1.0 * @return array */ public function get_column_names() { return apply_filters( "woocommerce_{$this->export_type}_export_column_names", $this->column_names, $this ); } /** * Set column names. * * @since 3.1.0 * @param array $column_names Column names array. */ public function set_column_names( $column_names ) { $this->column_names = array(); foreach ( $column_names as $column_id => $column_name ) { $this->column_names[ wc_clean( $column_id ) ] = wc_clean( $column_name ); } } /** * Return an array of columns to export. * * @since 3.1.0 * @return array */ public function get_columns_to_export() { return $this->columns_to_export; } /** * Return the delimiter to use in CSV file * * @since 3.9.0 * @return string */ public function get_delimiter() { return apply_filters( "woocommerce_{$this->export_type}_export_delimiter", $this->delimiter ); } /** * Set columns to export. * * @since 3.1.0 * @param array $columns Columns array. */ public function set_columns_to_export( $columns ) { $this->columns_to_export = array_map( 'wc_clean', $columns ); } /** * See if a column is to be exported or not. * * @since 3.1.0 * @param string $column_id ID of the column being exported. * @return boolean */ public function is_column_exporting( $column_id ) { $column_id = strstr( $column_id, ':' ) ? current( explode( ':', $column_id ) ) : $column_id; $columns_to_export = $this->get_columns_to_export(); if ( empty( $columns_to_export ) ) { return true; } if ( in_array( $column_id, $columns_to_export, true ) || 'meta' === $column_id ) { return true; } return false; } /** * Return default columns. * * @since 3.1.0 * @return array */ public function get_default_column_names() { return array(); } /** * Do the export. * * @since 3.1.0 */ public function export() { $this->prepare_data_to_export(); $this->send_headers(); $this->send_content( chr( 239 ) . chr( 187 ) . chr( 191 ) . $this->export_column_headers() . $this->get_csv_data() ); die(); } /** * Set the export headers. * * @since 3.1.0 */ public function send_headers() { if ( function_exists( 'gc_enable' ) ) { gc_enable(); // phpcs:ignore PHPCompatibility.FunctionUse.NewFunctions.gc_enableFound } if ( function_exists( 'apache_setenv' ) ) { @apache_setenv( 'no-gzip', 1 ); // @codingStandardsIgnoreLine } @ini_set( 'zlib.output_compression', 'Off' ); // @codingStandardsIgnoreLine @ini_set( 'output_buffering', 'Off' ); // @codingStandardsIgnoreLine @ini_set( 'output_handler', '' ); // @codingStandardsIgnoreLine ignore_user_abort( true ); wc_set_time_limit( 0 ); wc_nocache_headers(); header( 'Content-Type: text/csv; charset=utf-8' ); header( 'Content-Disposition: attachment; filename=' . $this->get_filename() ); header( 'Pragma: no-cache' ); header( 'Expires: 0' ); } /** * Set filename to export to. * * @param string $filename Filename to export to. */ public function set_filename( $filename ) { $this->filename = sanitize_file_name( str_replace( '.csv', '', $filename ) . '.csv' ); } /** * Generate and return a filename. * * @return string */ public function get_filename() { return sanitize_file_name( apply_filters( "woocommerce_{$this->export_type}_export_get_filename", $this->filename ) ); } /** * Set the export content. * * @since 3.1.0 * @param string $csv_data All CSV content. */ public function send_content( $csv_data ) { echo $csv_data; // @codingStandardsIgnoreLine } /** * Get CSV data for this export. * * @since 3.1.0 * @return string */ protected function get_csv_data() { return $this->export_rows(); } /** * Export column headers in CSV format. * * @since 3.1.0 * @return string */ protected function export_column_headers() { $columns = $this->get_column_names(); $export_row = array(); $buffer = fopen( 'php://output', 'w' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fopen ob_start(); foreach ( $columns as $column_id => $column_name ) { if ( ! $this->is_column_exporting( $column_id ) ) { continue; } $export_row[] = $this->format_data( $column_name ); } $this->fputcsv( $buffer, $export_row ); return ob_get_clean(); } /** * Get data that will be exported. * * @since 3.1.0 * @return array */ protected function get_data_to_export() { return $this->row_data; } /** * Export rows in CSV format. * * @since 3.1.0 * @return string */ protected function export_rows() { $data = $this->get_data_to_export(); $buffer = fopen( 'php://output', 'w' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fopen ob_start(); array_walk( $data, array( $this, 'export_row' ), $buffer ); return apply_filters( "woocommerce_{$this->export_type}_export_rows", ob_get_clean(), $this ); } /** * Export rows to an array ready for the CSV. * * @since 3.1.0 * @param array $row_data Data to export. * @param string $key Column being exported. * @param resource $buffer Output buffer. */ protected function export_row( $row_data, $key, $buffer ) { $columns = $this->get_column_names(); $export_row = array(); foreach ( $columns as $column_id => $column_name ) { if ( ! $this->is_column_exporting( $column_id ) ) { continue; } if ( isset( $row_data[ $column_id ] ) ) { $export_row[] = $this->format_data( $row_data[ $column_id ] ); } else { $export_row[] = ''; } } $this->fputcsv( $buffer, $export_row ); ++ $this->exported_row_count; } /** * Get batch limit. * * @since 3.1.0 * @return int */ public function get_limit() { return apply_filters( "woocommerce_{$this->export_type}_export_batch_limit", $this->limit, $this ); } /** * Set batch limit. * * @since 3.1.0 * @param int $limit Limit to export. */ public function set_limit( $limit ) { $this->limit = absint( $limit ); } /** * Get count of records exported. * * @since 3.1.0 * @return int */ public function get_total_exported() { return $this->exported_row_count; } /** * Escape a string to be used in a CSV context * * Malicious input can inject formulas into CSV files, opening up the possibility * for phishing attacks and disclosure of sensitive information. * * Additionally, Excel exposes the ability to launch arbitrary commands through * the DDE protocol. * * Number values are not escaped since a pure numeric value cannot form a valid formula to be injected. * This preserves negative numeric values (e.g. `-42`) as numbers in the CSV output. * * @see https://owasp.org/www-community/attacks/CSV_Injection * @see https://hackerone.com/reports/72785 * * @since 3.1.0 * @param string $data CSV field to escape. * @return string */ public function escape_data( $data ) { // 0x09: Tab (\t) // 0x0d: Carriage Return (\r) $active_content_triggers = array( '=', '+', '-', '@', chr( 0x09 ), chr( 0x0d ) ); // Don't escape pure numeric values since they cannot form a valid formula to be injected. if ( is_int( $data ) || is_float( $data ) ) { return $data; } if ( in_array( mb_substr( $data, 0, 1 ), $active_content_triggers, true ) ) { $data = "'" . $data; } return $data; } /** * Format and escape data ready for the CSV file. * * @since 3.1.0 * @param string $data Data to format. * @return string */ public function format_data( $data ) { if ( ! is_scalar( $data ) ) { if ( is_a( $data, 'WC_Datetime' ) ) { $data = $data->date( 'Y-m-d G:i:s' ); } else { $data = ''; // Not supported. } } elseif ( is_bool( $data ) ) { $data = $data ? 1 : 0; } $use_mb = function_exists( 'mb_convert_encoding' ); if ( $use_mb ) { $is_valid_utf_8 = mb_check_encoding( $data, 'UTF-8' ); if ( ! $is_valid_utf_8 ) { $data = mb_convert_encoding( $data, 'UTF-8', 'ISO-8859-1' ); } } return $this->escape_data( $data ); } /** * Format term ids to names. * * @since 3.1.0 * @param array $term_ids Term IDs to format. * @param string $taxonomy Taxonomy name. * @return string */ public function format_term_ids( $term_ids, $taxonomy ) { $term_ids = wp_parse_id_list( $term_ids ); if ( ! count( $term_ids ) ) { return ''; } $formatted_terms = array(); if ( is_taxonomy_hierarchical( $taxonomy ) ) { foreach ( $term_ids as $term_id ) { $formatted_term = array(); $ancestor_ids = array_reverse( get_ancestors( $term_id, $taxonomy ) ); foreach ( $ancestor_ids as $ancestor_id ) { $term = get_term( $ancestor_id, $taxonomy ); if ( $term && ! is_wp_error( $term ) ) { $formatted_term[] = $term->name; } } $term = get_term( $term_id, $taxonomy ); if ( $term && ! is_wp_error( $term ) ) { $formatted_term[] = $term->name; } $formatted_terms[] = implode( ' > ', $formatted_term ); } } else { foreach ( $term_ids as $term_id ) { $term = get_term( $term_id, $taxonomy ); if ( $term && ! is_wp_error( $term ) ) { $formatted_terms[] = $term->name; } } } return $this->implode_values( $formatted_terms ); } /** * Implode CSV cell values using commas by default, and wrapping values * which contain the separator. * * @since 3.2.0 * @param array $values Values to implode. * @return string */ protected function implode_values( $values ) { $values_to_implode = array(); foreach ( $values as $value ) { $value = (string) is_scalar( $value ) ? html_entity_decode( $value, ENT_QUOTES ) : ''; $values_to_implode[] = str_replace( ',', '\\,', $value ); } return implode( ', ', $values_to_implode ); } /** * Write to the CSV file. * * @since 3.4.0 * @param resource $buffer Resource we are writing to. * @param array $export_row Row to export. */ protected function fputcsv( $buffer, $export_row ) { fputcsv( $buffer, $export_row, $this->get_delimiter(), '"', "\0" ); // @codingStandardsIgnoreLine } }
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