XMLImportPluginHandler.class.php

<?php
/* 	
	Open Media Collectors Database
	Copyright (C) 2001,2013 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 XMLImportPluginHandler {
	var $importPlugin;
	var $fileHandler;
	
	// We want to send startElement name, attribs and any PCDATA as a single unit.
	var $_startElementName;
	var $_startElementAttribs;
	var $_characterData;
	var $_elementXPath = array ();
	
	// stores the first error encountered.
	var $_error;

	function __construct(&$importPlugin, &$fileHandler) {
		$this->importPlugin = & $importPlugin;
		$this->fileHandler = & $fileHandler;
	}

	function handleImport() {
		$parser = xml_parser_create ( 'ISO-8859-1' );
		xml_parser_set_option ( $parser, XML_OPTION_CASE_FOLDING, FALSE );
		xml_set_object ( $parser, $this );
		xml_set_element_handler ( $parser, "__startElement", "__endElement" );
		xml_set_character_data_handler ( $parser, "__characterData" );
		
		while ( ($data = $this->fileHandler->readLine ()) !== FALSE ) {
			if (! xml_parse ( $parser, $data, $this->fileHandler->isEof () )) {
				$this->_error = get_opendb_lang_var ( 'xml_error', array (
						'xml_error_string' => xml_error_string ( xml_get_error_code ( $parser ) ),
						'xml_error_line' => xml_get_current_line_number ( $parser ) ) );
				return FALSE;
			}
		}
		
		xml_parser_free ( $parser );
		
		return TRUE;
	}

	function __startElement($parser, $name, $attribs) {
		// if previous element has not been sent, send it now
		if (strlen ( $this->_startElementName ) > 0) {
			$this->importPlugin->start_element ( "/" . implode ( "/", $this->_elementXPath ), $this->_startElementName, $this->_startElementAttribs, trim ( $this->_characterData ) );
		}
		
		$this->_elementXPath [] = $name;
		$this->_startElementName = $name;
		$this->_startElementAttribs = $attribs;
		$this->_characterData = NULL;
	}

	function __endElement($parser, $name) {
		// if previous element has not been sent, send it now
		if (strlen ( $this->_startElementName ) > 0) {
			$this->importPlugin->start_element ( "/" . implode ( "/", $this->_elementXPath ), $this->_startElementName, $this->_startElementAttribs, trim ( $this->_characterData ) );
			
			$this->_startElementName = NULL;
			$this->_startElementAttribs = NULL;
			$this->_characterData = NULL;
		}
		
		$this->importPlugin->end_element ( "/" . implode ( "/", $this->_elementXPath ), $name );
		
		$elementName = array_pop ( $this->_elementXPath );
	}

	function __characterData($parser, $data) {
		$this->_characterData .= $data;
	}

	function getError() {
		return $this->_error;
	}
}
?>