<?php
/* 	
	Open Media Collectors Database
	Copyright (C) 2001,2006 by Jason Pell

	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; either version 2
	of the License, or (at your option) any later version.

	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; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
class CSVImportPlugin
{
	// required for introspection
	var $delimiter = ',';
	var $line_ending = "\n";
	
	function CSVImportPlugin() {
	}
	
	function get_display_name()
	{
		return 'Comma Delimited';
	}
	
	function get_plugin_type()
	{
		return 'row';
	}
	
	function is_extension_supported($extension)
	{
		return (strcasecmp($extension, 'csv') === 0);
	}

	/**
		Indicates that CSV are assumed to have a header row
	*/
	function is_header_row()
	{
		return TRUE;
	}

	function read_header(&$fileHandler, &$error)
	{
		return $this->read_row($fileHandler, $error);
	}

	function read_row(&$fileHandler, &$error)
	{
		$argument=NULL;
		$quotefound=FALSE;
	
		while(( $line = $fileHandler->readLine() ) !== FALSE)
		{
			// do not require start and end newlines.
			$line = trim($line);
			
			for($i=0; $i<strlen($line); $i++)
			{
				if($argument === NULL)
					$argument = "";
	
				if($line[$i] == "\"")
				{
					if($quotefound && $line[$i+1] == "\"")
					{
						$argument .= $line[$i];
						$i++;
					}
					else
					{
						$quotefound = !$quotefound;//toggle.
					}
				}
				else if($line[$i] == $this->delimiter)
				{
					if($quotefound)
						$argument .= $line[$i];//ignore cos its in quotes.
					else
					{
						$arguments[] = trim($argument);
						$argument = "";
					}
				}
				else
				{
					$argument .= $line[$i];
				}
			}
			
			// only keep going if we are in middle of quote
			if($quotefound)
			{
				$argument .= $this->line_ending;
			}
			else
			{
				break;
			}
		}
	
		if($argument!==NULL)
			$arguments[] = trim($argument);
	
		return $arguments;
	}
}
?>