wordpress_source.inc in WordPress Migrate 7
Same filename and directory in other branches
Common source support for migration from WordPress XML dumps.
File
wordpress_source.incView source
<?php
/**
* @file
* Common source support for migration from WordPress XML dumps.
*/
abstract class WordPressSource extends MigrateSource {
/**
* The WXR file being imported
* @var string
*/
protected $filename;
/**
* The parsed XML from the WXR file
* @var SimpleXMLElement
*/
protected $xml;
public function getXml() {
return $this->xml;
}
/**
* Array of XML elements we're traversing for this source.
*
* @var array
*/
protected $items = array();
/**
* Track where we are within the items array
*
* @var int
*/
protected $itemIndex = 0;
/**
* Number of items to be processed
* @var int
*/
protected $itemCount = 0;
/**
* xpath for selecting the appropriate elements for this source.
*
* @var string
*/
protected $xpath;
/**
* Number of eligible rows processed so far (used for itemlimit checking)
*
* @var int
*/
protected $numProcessed = 0;
/**
* The domain name of this blog
*
* @var string
*/
protected $baseBlogUrl;
public function getBaseBlogUrl() {
return $this->baseBlogUrl;
}
/**
* Simple initialization.
*/
public function __construct($filename) {
parent::__construct();
$this->filename = $filename;
// Suppress errors during parsing, so we can pick them up after
libxml_use_internal_errors(TRUE);
$this->xml = simplexml_load_file($this->filename);
if ($this->xml) {
$base_blog_url = $this->xml
->xpath('//channel/wp:base_blog_url');
$this->baseBlogUrl = (string) $base_blog_url[0];
}
else {
$message = '';
foreach (libxml_get_errors() as $error) {
$message .= $error->message . "\n";
}
throw new Exception($message);
}
}
/**
* Return a string representing the source.
*
* @return string
*/
public function __toString() {
return (string) $this->xpath;
}
/**
* Returns a list of fields available to be mapped from the source.
*
* @return array
* Keys: machine names of the fields (to be passed to addFieldMapping)
* Values: Human-friendly descriptions of the fields.
*/
public function fields() {
return $this->fields;
}
/**
* Return a count of all available source records.
*
* @param boolean $refresh
* Unused at this time.
*/
public function count($refresh = FALSE) {
$count = count($this->xml
->xpath($this->xpath));
return $count;
}
/**
* Implementation of Iterator::rewind() - called before beginning a foreach loop.
*/
public function rewind() {
$this->numProcessed = 0;
$this->items = $this->xml
->xpath($this->xpath);
$this->itemIndex = 0;
$this->itemCount = count($this->items);
// Load up the first row
$this
->next();
}
/**
* Implementation of Iterator::next() - called at the bottom of the loop implicitly,
* as well as explicitly from rewind().
*/
public function next() {
migrate_instrument_start('WordPressSource next');
$migration = Migration::currentMigration();
$this->currentRow = NULL;
$this->currentKey = NULL;
// If we've already hit the itemlimit, quit
$itemlimit = $migration
->getOption('itemlimit');
if ($itemlimit && $this->numProcessed >= $itemlimit) {
return;
}
// Loop over the elements to be processed. Note that itemIndex is persistent,
// so subsequent next() calls pick up where we left off.
while ($this->itemIndex < $this->itemCount) {
$item = $this->items[$this->itemIndex++];
$this->currentRow = NULL;
// Each particular source type needs to parse things in its own way. If it
// returns FALSE, skip this item.
if (!$this
->populateRow($item)) {
continue;
}
// Previously migrated?
$map_row = $migration
->getMap()
->getRowBySource($this->currentKey);
if (!$map_row) {
// Unmigrated row, take it
}
elseif ($map_row['needs_update'] == 1) {
// We always want to take this row if needs_update = 1
}
else {
// We want to skip this row if it's in the map table
continue;
}
// Add map info to the row, if present
if ($map_row) {
foreach ($map_row as $field => $value) {
$field = 'migrate_map_' . $field;
$this->currentRow->{$field} = $value;
}
}
// Allow the Migration to prepare this row. prepareRow() must return a
// boolean FALSE to prevent the row from being processed.
if (method_exists($migration, 'prepareRow')) {
$success = $migration
->prepareRow($this->currentRow);
}
else {
$success = TRUE;
}
if ($success === FALSE) {
$this->currentRow = NULL;
}
else {
$this->numProcessed++;
break;
}
}
if (!is_object($this->currentRow)) {
$this->currentRow = NULL;
}
migrate_instrument_stop('WordPressSource next');
}
}
Classes
Name | Description |
---|---|
WordPressSource | @file Common source support for migration from WordPress XML dumps. |