489 lines
11 KiB
PHP
489 lines
11 KiB
PHP
<?php
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/**
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* Handles CSV export.
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*
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* @package WooCommerce/Export
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* @version 3.1.0
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* WC_CSV_Exporter Class.
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*/
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abstract class WC_CSV_Exporter {
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/**
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* Type of export used in filter names.
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*
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* @var string
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*/
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protected $export_type = '';
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/**
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* Filename to export to.
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*
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* @var string
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*/
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protected $filename = 'wc-export.csv';
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/**
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* Batch limit.
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*
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* @var integer
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*/
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protected $limit = 50;
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/**
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* Number exported.
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*
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* @var integer
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*/
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protected $exported_row_count = 0;
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/**
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* Raw data to export.
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*
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* @var array
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*/
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protected $row_data = array();
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/**
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* Total rows to export.
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*
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* @var integer
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*/
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protected $total_rows = 0;
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/**
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* Columns ids and names.
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*
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* @var array
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*/
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protected $column_names = array();
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/**
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* List of columns to export, or empty for all.
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*
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* @var array
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*/
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protected $columns_to_export = array();
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/**
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* Prepare data that will be exported.
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*/
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abstract public function prepare_data_to_export();
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/**
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* Return an array of supported column names and ids.
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*
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* @since 3.1.0
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* @return array
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*/
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public function get_column_names() {
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return apply_filters( "woocommerce_{$this->export_type}_export_column_names", $this->column_names, $this );
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}
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/**
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* Set column names.
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*
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* @since 3.1.0
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* @param array $column_names Column names array.
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*/
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public function set_column_names( $column_names ) {
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$this->column_names = array();
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foreach ( $column_names as $column_id => $column_name ) {
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$this->column_names[ wc_clean( $column_id ) ] = wc_clean( $column_name );
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}
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}
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/**
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* Return an array of columns to export.
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*
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* @since 3.1.0
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* @return array
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*/
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public function get_columns_to_export() {
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return $this->columns_to_export;
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}
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/**
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* Set columns to export.
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*
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* @since 3.1.0
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* @param array $columns Columns array.
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*/
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public function set_columns_to_export( $columns ) {
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$this->columns_to_export = array_map( 'wc_clean', $columns );
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}
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/**
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* See if a column is to be exported or not.
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*
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* @since 3.1.0
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* @param string $column_id ID of the column being exported.
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* @return boolean
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*/
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public function is_column_exporting( $column_id ) {
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$column_id = strstr( $column_id, ':' ) ? current( explode( ':', $column_id ) ) : $column_id;
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$columns_to_export = $this->get_columns_to_export();
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if ( empty( $columns_to_export ) ) {
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return true;
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}
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if ( in_array( $column_id, $columns_to_export, true ) || 'meta' === $column_id ) {
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return true;
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}
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return false;
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}
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/**
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* Return default columns.
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*
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* @since 3.1.0
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* @return array
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*/
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public function get_default_column_names() {
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return array();
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}
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/**
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* Do the export.
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*
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* @since 3.1.0
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*/
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public function export() {
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$this->prepare_data_to_export();
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$this->send_headers();
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$this->send_content( chr( 239 ) . chr( 187 ) . chr( 191 ) . $this->export_column_headers() . $this->get_csv_data() );
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die();
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}
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/**
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* Set the export headers.
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*
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* @since 3.1.0
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*/
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public function send_headers() {
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if ( function_exists( 'gc_enable' ) ) {
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gc_enable(); // phpcs:ignore PHPCompatibility.PHP.NewFunctions.gc_enableFound
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}
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if ( function_exists( 'apache_setenv' ) ) {
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@apache_setenv( 'no-gzip', 1 ); // @codingStandardsIgnoreLine
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}
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@ini_set( 'zlib.output_compression', 'Off' ); // @codingStandardsIgnoreLine
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@ini_set( 'output_buffering', 'Off' ); // @codingStandardsIgnoreLine
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@ini_set( 'output_handler', '' ); // @codingStandardsIgnoreLine
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ignore_user_abort( true );
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wc_set_time_limit( 0 );
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wc_nocache_headers();
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header( 'Content-Type: text/csv; charset=utf-8' );
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header( 'Content-Disposition: attachment; filename=' . $this->get_filename() );
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header( 'Pragma: no-cache' );
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header( 'Expires: 0' );
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}
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/**
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* Set filename to export to.
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*
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* @param string $filename Filename to export to.
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*/
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public function set_filename( $filename ) {
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$this->filename = sanitize_file_name( str_replace( '.csv', '', $filename ) . '.csv' );
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}
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/**
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* Generate and return a filename.
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*
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* @return string
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*/
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public function get_filename() {
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return sanitize_file_name( apply_filters( "woocommerce_{$this->export_type}_export_get_filename", $this->filename ) );
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}
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/**
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* Set the export content.
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*
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* @since 3.1.0
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* @param string $csv_data All CSV content.
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*/
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public function send_content( $csv_data ) {
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echo $csv_data; // @codingStandardsIgnoreLine
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}
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/**
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* Get CSV data for this export.
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*
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* @since 3.1.0
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* @return string
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*/
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protected function get_csv_data() {
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return $this->export_rows();
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}
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/**
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* Export column headers in CSV format.
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*
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* @since 3.1.0
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* @return string
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*/
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protected function export_column_headers() {
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$columns = $this->get_column_names();
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$export_row = array();
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$buffer = fopen( 'php://output', 'w' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fopen
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ob_start();
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foreach ( $columns as $column_id => $column_name ) {
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if ( ! $this->is_column_exporting( $column_id ) ) {
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continue;
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}
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$export_row[] = $this->format_data( $column_name );
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}
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$this->fputcsv( $buffer, $export_row );
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return ob_get_clean();
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}
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/**
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* Get data that will be exported.
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*
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* @since 3.1.0
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* @return array
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*/
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protected function get_data_to_export() {
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return $this->row_data;
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}
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/**
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* Export rows in CSV format.
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*
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* @since 3.1.0
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* @return string
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*/
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protected function export_rows() {
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$data = $this->get_data_to_export();
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$buffer = fopen( 'php://output', 'w' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fopen
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ob_start();
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array_walk( $data, array( $this, 'export_row' ), $buffer );
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return apply_filters( "woocommerce_{$this->export_type}_export_rows", ob_get_clean(), $this );
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}
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/**
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* Export rows to an array ready for the CSV.
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*
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* @since 3.1.0
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* @param array $row_data Data to export.
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* @param string $key Column being exported.
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* @param resource $buffer Output buffer.
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*/
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protected function export_row( $row_data, $key, $buffer ) {
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$columns = $this->get_column_names();
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$export_row = array();
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foreach ( $columns as $column_id => $column_name ) {
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if ( ! $this->is_column_exporting( $column_id ) ) {
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continue;
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}
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if ( isset( $row_data[ $column_id ] ) ) {
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$export_row[] = $this->format_data( $row_data[ $column_id ] );
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} else {
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$export_row[] = '';
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}
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}
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$this->fputcsv( $buffer, $export_row );
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++ $this->exported_row_count;
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}
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/**
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* Get batch limit.
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*
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* @since 3.1.0
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* @return int
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*/
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public function get_limit() {
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return apply_filters( "woocommerce_{$this->export_type}_export_batch_limit", $this->limit, $this );
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}
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/**
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* Set batch limit.
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*
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* @since 3.1.0
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* @param int $limit Limit to export.
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*/
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public function set_limit( $limit ) {
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$this->limit = absint( $limit );
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}
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/**
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* Get count of records exported.
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*
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* @since 3.1.0
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* @return int
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*/
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public function get_total_exported() {
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return $this->exported_row_count;
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}
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/**
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* Escape a string to be used in a CSV context
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*
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* Malicious input can inject formulas into CSV files, opening up the possibility
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* for phishing attacks and disclosure of sensitive information.
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*
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* Additionally, Excel exposes the ability to launch arbitrary commands through
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* the DDE protocol.
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*
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* @see http://www.contextis.com/resources/blog/comma-separated-vulnerabilities/
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* @see https://hackerone.com/reports/72785
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*
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* @since 3.1.0
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* @param string $data CSV field to escape.
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* @return string
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*/
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public function escape_data( $data ) {
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$active_content_triggers = array( '=', '+', '-', '@' );
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if ( in_array( mb_substr( $data, 0, 1 ), $active_content_triggers, true ) ) {
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$data = "'" . $data . "'";
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}
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return $data;
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}
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/**
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* Format and escape data ready for the CSV file.
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*
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* @since 3.1.0
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* @param string $data Data to format.
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* @return string
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*/
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public function format_data( $data ) {
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if ( ! is_scalar( $data ) ) {
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if ( is_a( $data, 'WC_Datetime' ) ) {
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$data = $data->date( 'Y-m-d G:i:s' );
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} else {
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$data = ''; // Not supported.
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}
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} elseif ( is_bool( $data ) ) {
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$data = $data ? 1 : 0;
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}
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$use_mb = function_exists( 'mb_convert_encoding' );
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$data = (string) urldecode( $data );
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if ( $use_mb ) {
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$encoding = mb_detect_encoding( $data, 'UTF-8, ISO-8859-1', true );
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$data = 'UTF-8' === $encoding ? $data : utf8_encode( $data );
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}
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return $this->escape_data( $data );
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}
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/**
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* Format term ids to names.
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*
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* @since 3.1.0
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* @param array $term_ids Term IDs to format.
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* @param string $taxonomy Taxonomy name.
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* @return string
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*/
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public function format_term_ids( $term_ids, $taxonomy ) {
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$term_ids = wp_parse_id_list( $term_ids );
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if ( ! count( $term_ids ) ) {
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return '';
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}
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$formatted_terms = array();
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if ( is_taxonomy_hierarchical( $taxonomy ) ) {
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foreach ( $term_ids as $term_id ) {
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$formatted_term = array();
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$ancestor_ids = array_reverse( get_ancestors( $term_id, $taxonomy ) );
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foreach ( $ancestor_ids as $ancestor_id ) {
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$term = get_term( $ancestor_id, $taxonomy );
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if ( $term && ! is_wp_error( $term ) ) {
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$formatted_term[] = $term->name;
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}
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}
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$term = get_term( $term_id, $taxonomy );
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if ( $term && ! is_wp_error( $term ) ) {
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$formatted_term[] = $term->name;
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}
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$formatted_terms[] = implode( ' > ', $formatted_term );
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}
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} else {
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foreach ( $term_ids as $term_id ) {
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$term = get_term( $term_id, $taxonomy );
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if ( $term && ! is_wp_error( $term ) ) {
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$formatted_terms[] = $term->name;
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}
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}
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}
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return $this->implode_values( $formatted_terms );
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}
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/**
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* Implode CSV cell values using commas by default, and wrapping values
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* which contain the separator.
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*
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* @since 3.2.0
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* @param array $values Values to implode.
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* @return string
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*/
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protected function implode_values( $values ) {
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$values_to_implode = array();
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foreach ( $values as $value ) {
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$value = (string) is_scalar( $value ) ? $value : '';
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$values_to_implode[] = str_replace( ',', '\\,', $value );
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}
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return implode( ', ', $values_to_implode );
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}
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/**
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* Write to the CSV file, ensuring escaping works across versions of
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* PHP.
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*
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* PHP 5.5.4 uses '\' as the default escape character. This is not RFC-4180 compliant.
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* \0 disables the escape character.
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*
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* @see https://bugs.php.net/bug.php?id=43225
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* @see https://bugs.php.net/bug.php?id=50686
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* @see https://github.com/woocommerce/woocommerce/issues/19514
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* @since 3.4.0
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* @param resource $buffer Resource we are writing to.
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* @param array $export_row Row to export.
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*/
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protected function fputcsv( $buffer, $export_row ) {
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if ( version_compare( PHP_VERSION, '5.5.4', '<' ) ) {
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ob_start();
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$temp = fopen( 'php://output', 'w' ); // @codingStandardsIgnoreLine
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fputcsv( $temp, $export_row, ",", '"' ); // @codingStandardsIgnoreLine
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fclose( $temp ); // @codingStandardsIgnoreLine
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$row = ob_get_clean();
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$row = str_replace( '\\"', '\\""', $row );
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fwrite( $buffer, $row ); // @codingStandardsIgnoreLine
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} else {
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fputcsv( $buffer, $export_row, ",", '"', "\0" ); // @codingStandardsIgnoreLine
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}
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}
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}
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