<?

/*
 * This file is part of the 'Science Fair In A Box' project
 * Science-ation Website: https://science-ation.ca/
 *
 * Copyright (C) 2006 Sci-Tech Ontario Inc <info@scitechontario.org>
 * Copyright (C) 2006 James Grant <james@lightbox.org>
 * Copyright (C) 2024 AlgoLibre Inc. <science-ation@algolibre.io>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
?>
<?
class CSVParser
{
	var $delimiter;  // Field delimiter
	var $enclosure;  // Field enclosure character
	var $data;  // CSV data

	function CSVParser()
	{
		$this->delimiter = ',';
		$this->enclosure = '"';
		$this->data = array();
	}

	function parseFile($filename)
	{
		$content = file_get_contents($filename);
		$content = str_replace("\r\n", "\n", $content);
		$content = str_replace("\r", "\n", $content);
		if ($content[strlen($content) - 1] != "\n")  // Make sure it always end with a newline
			$content .= "\n";

		// Parse the content character by character
		$row = array('');
		$idx = 0;
		$quoted = false;
		for ($i = 0; $i < strlen($content); $i++) {
			$ch = $content[$i];
			if ($ch == $this->enclosure)
				$quoted = !$quoted;

			// End of line
			if ($ch == "\n" && !$quoted) {
				// Remove enclosure delimiters
				for ($k = 0; $k < count($row); $k++) {
					if ($row[$k] != '' && $row[$k][0] == $this->enclosure) {
						$row[$k] = substr($row[$k], 1, strlen($row[$k]) - 2);
					}
					$row[$k] = str_replace(str_repeat($this->enclosure, 2), $this->enclosure, $row[$k]);
				}

				// Append row into table
				$this->data[] = $row;
				$row = array('');
				$idx = 0;
			}
			// End of field
			else if ($ch == $this->delimiter && !$quoted)
				$row[++$idx] = '';
			// Inside the field
			else
				$row[$idx] .= $ch;
		}
		return true;
	}
}

?>