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<?php
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/**
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* @file
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* The Node export XML format handler.
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*
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* Adds XML format to Node export.
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*/
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/**
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* Export callback.
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*/
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function node_export_xml_export($nodes, $format) {
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$xml_code = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
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$xml_code .= "<node_export created=\"" . date('r') . "\">\n";
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$xml_code .= node_export_xml_encode($nodes);
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$xml_code .= "</node_export>";
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return $xml_code;
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}
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/**
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* Import callback.
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*/
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function node_export_xml_import($code_string) {
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// Check for "<?xml" at the start.
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if (substr(ltrim($code_string), 0, 5) == "<?xml") {
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// Decode the XML.
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$xml_class = new NodeExportXmlDecoder();
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$result = $xml_class->decode($code_string);
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// Convert the nodes into objects.
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if (!isset($result['success'])) {
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foreach($result as $k => $v) {
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$result[$k] = (object)$v;
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}
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}
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return $result;
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}
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}
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/**
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* Build XML string recursively.
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*/
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function node_export_xml_encode($var, $iteration = 0) {
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$xml_code = "";
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$tab = '';
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for ($i = 0; $i <= $iteration; $i++) {
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$tab = $tab . " ";
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}
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$iteration++;
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foreach ($var as $key => $value) {
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$attributes = array();
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if (is_bool($value)) {
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$attributes['type'] = 'boolean';
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}
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elseif (is_null($value)) {
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$attributes['type'] = 'NULL';
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}
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elseif (is_object($value)) {
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if ($iteration == 1 && isset($value->nid) && isset($value->type)) {
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// Assume first-level object with a nid and type is a stdClass node.
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$key = "node";
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}
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else {
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$attributes['class'] = get_class($value);
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}
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$value = (array)$value;
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}
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if (is_array($value) && array_values($value) === $value) {
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$attributes['_numeric_keys'] = "1";
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}
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$attr_string = "";
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foreach ($attributes as $attr_name => $attr_value) {
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$attr_string .= ' ' . $attr_name . '="' . $attr_value . '"';
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}
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if (is_numeric($key)) {
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$key = "n" . $key;
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}
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$xml_code .= $tab . "<" . $key . $attr_string . ">";
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if (is_array($value)) {
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if (!empty($value)) {
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$xml_code .= "\n";
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$xml_code .= node_export_xml_encode($value, $iteration);
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if (!is_numeric($key)) {
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$xml_code .= $tab;
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}
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}
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}
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elseif (is_numeric($value)) {
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$xml_code .= $value;
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}
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elseif (is_bool($value)) {
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$xml_code .= ($value ? 'TRUE' : 'FALSE');
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}
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elseif (is_string($value)) {
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$xml_code .= htmlspecialchars($value);
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}
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$xml_code .= "</" . $key . ">\n";
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}
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return $xml_code;
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}
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/**
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* Class for parsing Node export XML.
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*/
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class NodeExportXmlDecoder {
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var $stack;
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var $output;
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function decode($code_string) {
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$parser = xml_parser_create();
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xml_set_element_handler($parser, array(&$this, 'start_handler'), array(&$this, 'end_handler'));
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xml_set_character_data_handler($parser, array(&$this, 'data_handler'));
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$this->stack = array(
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array(
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'name' => 'node_export',
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'attributes' => array(),
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'children' => array(),
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'data' => '',
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)
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);
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if (!xml_parse($parser, $code_string)) {
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$errors[] = "Node export XML import was unsuccessful, error details follow. No nodes imported.";
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$line = xml_get_current_line_number($parser);
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$column = xml_get_current_column_number($parser);
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$error = xml_error_string(xml_get_error_code($parser));
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$errors[] = "Line " . $line . ", Column " . $column .": ". $error;
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$lines = explode("\n", $code_string, $line + 1);
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$errors[] = "<pre>". htmlspecialchars($lines[$line - 1]) ."</pre>";
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xml_parser_free($parser);
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return array(
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'success' => FALSE,
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'output' => $errors,
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);
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}
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xml_parser_free($parser);
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$tmp = $this->build($this->stack[0]);
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if (count($tmp) == 1) {
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$this->output = array_pop($tmp);
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}
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else {
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$this->output = array();
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}
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unset($this->stack);
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return $this->output;
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}
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function build($stack) {
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$result = array();
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if (count($stack['children']) > 0) {
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$keycount = array();
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foreach ($stack['children'] as $child) {
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$keycount[] = $child['name'];
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}
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if (count(array_unique($keycount)) != count($keycount)) {
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// Enumerated array.
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$children = array();
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foreach ($stack['children'] as $child) {
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$children[] = $this->build($child);
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}
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}
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else {
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// Associative array.
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$children = array();
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foreach ($stack['children'] as $child) {
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if (!empty($stack['attributes']['_NUMERIC_KEYS'])) {
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$child['name'] = intval(substr($child['name'], 1));
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}
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$children[$child['name']] = $this->build($child);
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}
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}
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$result = array_merge($result, $children);
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}
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if (count($result) == 0) {
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// An atomic value.
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$return = trim($stack['data']);
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if (isset($stack['attributes']['TYPE'])) {
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if ($stack['attributes']['TYPE'] == 'boolean') {
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return (trim($stack['data']) == 'TRUE' ? TRUE : FALSE);
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}
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elseif ($stack['attributes']['TYPE'] == 'NULL') {
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return NULL;
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}
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}
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return htmlspecialchars_decode(trim($stack['data']));
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}
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else {
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// An array or object.
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if (isset($stack['attributes']['CLASS'])) {
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$object = new $stack['attributes']['CLASS']();
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foreach ($result as $k => $v) {
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$object->$k = $v;
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}
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$result = $object;
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}
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return $result;
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}
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}
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function start_handler($parser, $name, $attributes = array()) {
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$token = array();
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$token['name'] = strtolower($name);
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$token['attributes'] = $attributes;
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$token['data'] = '';
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$token['children'] = array();
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$this->stack[] = $token;
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}
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function end_handler($parser, $name, $attributes = array()) {
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$token = array_pop($this->stack);
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$this->stack[count($this->stack) - 1]['children'][] = $token;
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}
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function data_handler($parser, $data) {
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$this->stack[count($this->stack) - 1]['data'] .= $data;
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}
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}
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/**
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* Callback for actions.
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*/
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function node_export_xml_action_form($context, &$form_state) {
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return node_export_action_form($context, $form_state, 'xml');
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}
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