/**
* Get preview for sample CSV data
*
* @since 3.0.0
*/
public function get_preview()
{
check_ajax_referer('get-csv-preview', 'security');
$delimiter = isset($_GET['delimiter']) ? $_GET['delimiter'] : ',';
$file = isset($_GET['file']) ? $_GET['file'] : '';
if (!$file) {
wp_die();
}
list($data, $headers) = WC_CSV_Import_Suite_Parser::parse_sample_data($file, $delimiter);
$data = array(1 => $headers) + $data;
echo WC_CSV_Import_Suite_Parser::generate_html_rows($data);
wp_die();
}
/**
* Find related items (lines) in a multi-line format CSV file
*
* @since 3.0.0
* @param mixed $item_identifier Identifier used to match related lines
* @param array $parsed_data Parsed data from CSV
* @param int $line_num Current line number counter. Passed by reference
* @param array $options Import options
* @return array Array of related items/lines
*/
protected function find_related_items($item_identifier, $parsed_data, &$line_num, $options)
{
$related_items = array();
do {
$next_item = $next_parsed_item = null;
$item_continued = $results = false;
// the next line has already been read from the CSV file
if (isset($parsed_data[$line_num + 1])) {
$next_item = $parsed_data[$line_num + 1];
} else {
$_options = $options;
$_options['start_pos'] = $this->import_progress['pos'];
// we continue from last pointer position
$_options['start_line'] = $this->import_progress['line'] + 1;
// but we need to increment the line number ourselves
$_options['max_lines'] = 1;
// read raw data from CSV file
$results = WC_CSV_Import_Suite_Parser::parse($this->file, $_options);
$next_item = !empty($results[0]) ? $results[0][$line_num + 1] : null;
}
// an item (line) was successfully found
if (!empty($next_item)) {
// check if the next line is related to the last (current) line
$item_continued = $item_identifier == $this->get_item_identifier($next_item);
// if the next item identifier matches current, we know those lines
// belong together to form a single item
if ($item_continued) {
// increment import progress
// NB! Intentional overwrite of $line_num
$line_num++;
$related_items[$line_num] = $next_item;
$this->import_progress = array('line' => $line_num, 'pos' => $results[2]);
}
}
} while ($next_item && $item_continued);
return $related_items;
}
