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<?php
/**
* @version $Id: installer.php 14401 2010-01-26 14:10:00Z louis $
* @package Joomla.Framework
* @subpackage Installer
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
jimport('joomla.filesystem.file');
jimport('joomla.filesystem.folder');
jimport('joomla.filesystem.archive');
jimport('joomla.filesystem.path');
/**
* Joomla base installer class
*
* @package Joomla.Framework
* @subpackage Installer
* @since 1.5
*/
class JInstaller extends JObject
{
/**
* Array of paths needed by the installer
* @var array
*/
var $_paths = array();
/**
* The installation manifest XML object
* @var object
*/
var $_manifest = null;
/**
* True if existing files can be overwritten
* @var boolean
*/
var $_overwrite = false;
/**
* A database connector object
* @var object
*/
var $_db = null;
/**
* Associative array of package installer handlers
* @var array
*/
var $_adapters = array();
/**
* Stack of installation steps
* - Used for installation rollback
* @var array
*/
var $_stepStack = array();
/**
* The output from the install/uninstall scripts
* @var string
*/
var $message = null;
/**
* Constructor
*
* @access protected
*/
function __construct()
{
$this->_db =& JFactory::getDBO();
}
/**
* Returns a reference to the global Installer object, only creating it
* if it doesn't already exist.
*
* @static
* @return object An installer object
* @since 1.5
*/
function &getInstance()
{
static $instance;
if (!isset ($instance)) {
$instance = new JInstaller();
}
return $instance;
}
/**
* Get the allow overwrite switch
*
* @access public
* @return boolean Allow overwrite switch
* @since 1.5
*/
function getOverwrite()
{
return $this->_overwrite;
}
/**
* Set the allow overwrite switch
*
* @access public
* @param boolean $state Overwrite switch state
* @return boolean Previous value
* @since 1.5
*/
function setOverwrite($state=false)
{
$tmp = $this->_overwrite;
if ($state) {
$this->_overwrite = true;
} else {
$this->_overwrite = false;
}
return $tmp;
}
/**
* Get the database connector object
*
* @access public
* @return object Database connector object
* @since 1.5
*/
function &getDBO()
{
return $this->_db;
}
/**
* Get the installation manifest object
*
* @access public
* @return object Manifest object
* @since 1.5
*/
function &getManifest()
{
if (!is_object($this->_manifest)) {
$this->_findManifest();
}
return $this->_manifest;
}
/**
* Get an installer path by name
*
* @access public
* @param string $name Path name
* @param string $default Default value
* @return string Path
* @since 1.5
*/
function getPath($name, $default=null)
{
return (!empty($this->_paths[$name])) ? $this->_paths[$name] : $default;
}
/**
* Sets an installer path by name
*
* @access public
* @param string $name Path name
* @param string $value Path
* @return void
* @since 1.5
*/
function setPath($name, $value)
{
$this->_paths[$name] = $value;
}
/**
* Pushes a step onto the installer stack for rolling back steps
*
* @access public
* @param array $step Installer step
* @return void
* @since 1.5
*/
function pushStep($step)
{
$this->_stepStack[] = $step;
}
/**
* Set an installer adapter by name
*
* @access public
* @param string $name Adapter name
* @param object $adapter Installer adapter object
* @return boolean True if successful
* @since 1.5
*/
function setAdapter($name, $adapter = null)
{
if (!is_object($adapter))
{
// Try to load the adapter object
require_once(dirname(__FILE__).DS.'adapters'.DS.strtolower($name).'.php');
$class = 'JInstaller'.ucfirst($name);
if (!class_exists($class)) {
return false;
}
$adapter = new $class($this);
$adapter->parent =& $this;
}
$this->_adapters[$name] =& $adapter;
return true;
}
/**
* Installation abort method
*
* @access public
* @param string $msg Abort message from the installer
* @param string $type Package type if defined
* @return boolean True if successful
* @since 1.5
*/
function abort($msg=null, $type=null)
{
// Initialize variables
$retval = true;
$step = array_pop($this->_stepStack);
// Raise abort warning
if ($msg) {
JError::raiseWarning(100, $msg);
}
while ($step != null)
{
switch ($step['type'])
{
case 'file' :
// remove the file
$stepval = JFile::delete($step['path']);
break;
case 'folder' :
// remove the folder
$stepval = JFolder::delete($step['path']);
break;
case 'query' :
// placeholder in case this is necessary in the future
break;
default :
if ($type && is_object($this->_adapters[$type])) {
// Build the name of the custom rollback method for the type
$method = '_rollback_'.$step['type'];
// Custom rollback method handler
if (method_exists($this->_adapters[$type], $method)) {
$stepval = $this->_adapters[$type]->$method($step);
}
}
break;
}
// Only set the return value if it is false
if ($stepval === false) {
$retval = false;
}
// Get the next step and continue
$step = array_pop($this->_stepStack);
}
return $retval;
}
/**
* Package installation method
*
* @access public
* @param string $path Path to package source folder
* @return boolean True if successful
* @since 1.5
*/
function install($path=null)
{
if ($path && JFolder::exists($path)) {
$this->setPath('source', $path);
} else {
$this->abort(JText::_('Install path does not exist'));
return false;
}
if (!$this->setupInstall()) {
$this->abort(JText::_('Unable to detect manifest file'));
return false;
}
/*
* LEGACY CHECK
*/
$root =& $this->_manifest->document;
$version = $root->attributes('version');
$rootName = $root->name();
$config = &JFactory::getConfig();
if ((version_compare($version, '1.5', '<') || $rootName == 'mosinstall') && !$config->getValue('config.legacy')) {
$this->abort(JText::_('MUSTENABLELEGACY'));
return false;
}
$type = $root->attributes('type');
// Needed for legacy reasons ... to be deprecated in next minor release
if ($type == 'mambot') {
$type = 'plugin';
}
if (is_object($this->_adapters[$type])) {
return $this->_adapters[$type]->install();
}
return false;
}
/**
* Package update method
*
* @access public
* @param string $path Path to package source folder
* @return boolean True if successful
* @since 1.5
*/
function update($path=null)
{
if ($path && JFolder::exists($path)) {
$this->setPath('source', $path);
} else {
$this->abort(JText::_('Update path does not exist'));
}
if (!$this->setupInstall()) {
return $this->abort(JText::_('Unable to detect manifest file'));
}
/*
* LEGACY CHECK
*/
$root =& $this->_manifest->document;
$version = $root->attributes('version');
$rootName = $root->name();
$config = &JFactory::getConfig();
if ((version_compare($version, '1.5', '<') || $rootName == 'mosinstall') && !$config->getValue('config.legacy')) {
return $this->abort(JText::_('MUSTENABLELEGACY'));
}
$type = $root->attributes('type');
// Needed for legacy reasons ... to be deprecated in next minor release
if ($type == 'mambot') {
$type = 'plugin';
}
if (is_object($this->_adapters[$type])) {
return $this->_adapters[$type]->update();
}
return false;
}
/**
* Package uninstallation method
*
* @access public
* @param string $type Package type
* @param mixed $identifier Package identifier for adapter
* @param int $cid Application ID
* @return boolean True if successful
* @since 1.5
*/
function uninstall($type, $identifier, $cid=0)
{
if (!isset($this->_adapters[$type]) || !is_object($this->_adapters[$type])) {
if (!$this->setAdapter($type)) {
return false;
}
}
if (is_object($this->_adapters[$type])) {
return $this->_adapters[$type]->uninstall($identifier, $cid);
}
return false;
}
/**
* Prepare for installation: this method sets the installation directory, finds
* and checks the installation file and verifies the installation type
*
* @access public
* @return boolean True on success
* @since 1.0
*/
function setupInstall()
{
// We need to find the installation manifest file
if (!$this->_findManifest()) {
return false;
}
// Load the adapter(s) for the install manifest
$root =& $this->_manifest->document;
$type = $root->attributes('type');
// Needed for legacy reasons ... to be deprecated in next minor release
if ($type == 'mambot') {
$type = 'plugin';
}
// Lazy load the adapter
if (!isset($this->_adapters[$type]) || !is_object($this->_adapters[$type])) {
if (!$this->setAdapter($type)) {
return false;
}
}
return true;
}
/**
* Backward compatible Method to parse through a queries element of the
* installation manifest file and take appropriate action.
*
* @access public
* @param object $element The xml node to process
* @return mixed Number of queries processed or False on error
* @since 1.5
*/
function parseQueries($element)
{
// Get the database connector object
$db = & $this->_db;
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return 0;
}
// Get the array of query nodes to process
$queries = $element->children();
if (count($queries) == 0) {
// No queries to process
return 0;
}
// Process each query in the $queries array (children of $tagName).
foreach ($queries as $query)
{
$db->setQuery($query->data());
if (!$db->query()) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('SQL Error')." ".$db->stderr(true));
return false;
}
}
return (int) count($queries);
}
/**
* Method to extract the name of a discreet installation sql file from the installation manifest file.
*
* @access public
* @param object $element The xml node to process
* @param string $version The database connector to use
* @return mixed Number of queries processed or False on error
* @since 1.5
*/
function parseSQLFiles($element)
{
// Initialize variables
$queries = array();
$db = & $this->_db;
$dbDriver = strtolower($db->get('name'));
if ($dbDriver == 'mysqli') {
$dbDriver = 'mysql';
}
$dbCharset = ($db->hasUTF()) ? 'utf8' : '';
if (!is_a($element, 'JSimpleXMLElement')) {
// The tag does not exist.
return 0;
}
// Get the array of file nodes to process
$files = $element->children();
if (count($files) == 0) {
// No files to process
return 0;
}
// Get the name of the sql file to process
$sqlfile = '';
foreach ($files as $file)
{
$fCharset = (strtolower($file->attributes('charset')) == 'utf8') ? 'utf8' : '';
$fDriver = strtolower($file->attributes('driver'));
if ($fDriver == 'mysqli') {
$fDriver = 'mysql';
}
if( $fCharset == $dbCharset && $fDriver == $dbDriver) {
$sqlfile = $file->data();
// Check that sql files exists before reading. Otherwise raise error for rollback
if ( !file_exists( $this->getPath('extension_administrator').DS.$sqlfile ) ) {
return false;
}
$buffer = file_get_contents($this->getPath('extension_administrator').DS.$sqlfile);
// Graceful exit and rollback if read not successful
if ( $buffer === false ) {
return false;
}
// Create an array of queries from the sql file
jimport('joomla.installer.helper');
$queries = JInstallerHelper::splitSql($buffer);
if (count($queries) == 0) {
// No queries to process
return 0;
}
// Process each query in the $queries array (split out of sql file).
foreach ($queries as $query)
{
$query = trim($query);
if ($query != '' && $query{0} != '#') {
$db->setQuery($query);
if (!$db->query()) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('SQL Error')." ".$db->stderr(true));
return false;
}
}
}
}
}
return (int) count($queries);
}
/**
* Method to parse through a files element of the installation manifest and take appropriate
* action.
*
* @access public
* @param object $element The xml node to process
* @param int $cid Application ID of application to install to
* @return boolean True on success
* @since 1.5
*/
function parseFiles($element, $cid=0)
{
// Initialize variables
$copyfiles = array ();
// Get the client info
jimport('joomla.application.helper');
$client =& JApplicationHelper::getClientInfo($cid);
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return 0;
}
// Get the array of file nodes to process
$files = $element->children();
if (count($files) == 0) {
// No files to process
return 0;
}
/*
* Here we set the folder we are going to remove the files from.
*/
if ($client) {
$pathname = 'extension_'.$client->name;
$destination = $this->getPath($pathname);
} else {
$pathname = 'extension_root';
$destination = $this->getPath($pathname);
}
/*
* Here we set the folder we are going to copy the files from.
*
* Does the element have a folder attribute?
*
* If so this indicates that the files are in a subdirectory of the source
* folder and we should append the folder attribute to the source path when
* copying files.
*/
if ($folder = $element->attributes('folder')) {
$source = $this->getPath('source').DS.$folder;
} else {
$source = $this->getPath('source');
}
// Process each file in the $files array (children of $tagName).
foreach ($files as $file)
{
$path['src'] = $source.DS.$file->data();
$path['dest'] = $destination.DS.$file->data();
// Is this path a file or folder?
$path['type'] = ( $file->name() == 'folder') ? 'folder' : 'file';
/*
* Before we can add a file to the copyfiles array we need to ensure
* that the folder we are copying our file to exits and if it doesn't,
* we need to create it.
*/
if (basename($path['dest']) != $path['dest']) {
$newdir = dirname($path['dest']);
if (!JFolder::create($newdir)) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('Failed to create directory').' "'.$newdir.'"');
return false;
}
}
// Add the file to the copyfiles array
$copyfiles[] = $path;
}
return $this->copyFiles($copyfiles);
}
/**
* Method to parse through a languages element of the installation manifest and take appropriate
* action.
*
* @access public
* @param object $element The xml node to process
* @param int $cid Application ID of application to install to
* @return boolean True on success
* @since 1.5
*/
function parseLanguages($element, $cid=0)
{
// Initialize variables
$copyfiles = array ();
// Get the client info
jimport('joomla.application.helper');
$client =& JApplicationHelper::getClientInfo($cid);
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return 0;
}
// Get the array of file nodes to process
$files = $element->children();
if (count($files) == 0) {
// No files to process
return 0;
}
/*
* Here we set the folder we are going to copy the files to.
*
* 'languages' Files are copied to JPATH_BASE/language/ folder
*/
$destination = $client->path.DS.'language';
/*
* Here we set the folder we are going to copy the files from.
*
* Does the element have a folder attribute?
*
* If so this indicates that the files are in a subdirectory of the source
* folder and we should append the folder attribute to the source path when
* copying files.
*/
if ($folder = $element->attributes('folder')) {
$source = $this->getPath('source').DS.$folder;
} else {
$source = $this->getPath('source');
}
// Process each file in the $files array (children of $tagName).
foreach ($files as $file)
{
/*
* Language files go in a subfolder based on the language code, ie.
*
* <language tag="en-US">en-US.mycomponent.ini</language>
*
* would go in the en-US subdirectory of the language folder.
*
* We will only install language files where a core language pack
* already exists.
*/
if ($file->attributes('tag') != '') {
$path['src'] = $source.DS.$file->data();
$path['dest'] = $destination.DS.$file->attributes('tag').DS.basename($file->data());
// If the language folder is not present, then the core pack hasn't been installed... ignore
if (!JFolder::exists(dirname($path['dest']))) {
continue;
}
} else {
$path['src'] = $source.DS.$file->data();
$path['dest'] = $destination.DS.$file->data();
}
/*
* Before we can add a file to the copyfiles array we need to ensure
* that the folder we are copying our file to exits and if it doesn't,
* we need to create it.
*/
if (basename($path['dest']) != $path['dest']) {
$newdir = dirname($path['dest']);
if (!JFolder::create($newdir)) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('Failed to create directory').' "'.$newdir.'"');
return false;
}
}
// Add the file to the copyfiles array
$copyfiles[] = $path;
}
return $this->copyFiles($copyfiles);
}
/**
* Method to parse through a media element of the installation manifest and take appropriate
* action.
*
* @access public
* @param object $element The xml node to process
* @param int $cid Application ID of application to install to
* @return boolean True on success
* @since 1.5
*/
function parseMedia($element, $cid=0)
{
// Initialize variables
$copyfiles = array ();
// Get the client info
jimport('joomla.application.helper');
$client =& JApplicationHelper::getClientInfo($cid);
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return 0;
}
// Get the array of file nodes to process
$files = $element->children();
if (count($files) == 0) {
// No files to process
return 0;
}
/*
* Here we set the folder we are going to copy the files to.
* Default 'media' Files are copied to the JPATH_BASE/media folder
*/
$folder = ($element->attributes('destination')) ? DS.$element->attributes('destination') : null;
$destination = JPath::clean(JPATH_ROOT.DS.'media'.$folder);
/*
* Here we set the folder we are going to copy the files from.
*
* Does the element have a folder attribute?
*
* If so this indicates that the files are in a subdirectory of the source
* folder and we should append the folder attribute to the source path when
* copying files.
*/
if ($folder = $element->attributes('folder')) {
$source = $this->getPath('source').DS.$folder;
} else {
$source = $this->getPath('source');
}
// Process each file in the $files array (children of $tagName).
foreach ($files as $file)
{
$path['src'] = $source.DS.$file->data();
$path['dest'] = $destination.DS.$file->data();
// Is this path a file or folder?
$path['type'] = ( $file->name() == 'folder') ? 'folder' : 'file';
/*
* Before we can add a file to the copyfiles array we need to ensure
* that the folder we are copying our file to exits and if it doesn't,
* we need to create it.
*/
if (basename($path['dest']) != $path['dest']) {
$newdir = dirname($path['dest']);
if (!JFolder::create($newdir)) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('Failed to create directory').' "'.$newdir.'"');
return false;
}
}
// Add the file to the copyfiles array
$copyfiles[] = $path;
}
return $this->copyFiles($copyfiles);
}
/**
* Method to parse the parameters of an extension, build the INI
* string for it's default parameters, and return the INI string.
*
* @access public
* @return string INI string of parameter values
* @since 1.5
*/
function getParams()
{
// Get the manifest document root element
$root = & $this->_manifest->document;
// Get the element of the tag names
$element =& $root->getElementByPath('params');
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return null;
}
// Get the array of parameter nodes to process
$params = $element->children();
if (count($params) == 0) {
// No params to process
return null;
}
// Process each parameter in the $params array.
$ini = null;
foreach ($params as $param) {
if (!$name = $param->attributes('name')) {
continue;
}
if (!$value = $param->attributes('default')) {
continue;
}
$ini .= $name."=".$value."\n";
}
return $ini;
}
/**
* Copy files from source directory to the target directory
*
* @access public
* @param array $files array with filenames
* @param boolean $overwrite True if existing files can be replaced
* @return boolean True on success
* @since 1.5
*/
function copyFiles($files, $overwrite=null)
{
/*
* To allow for manual override on the overwriting flag, we check to see if
* the $overwrite flag was set and is a boolean value. If not, use the object
* allowOverwrite flag.
*/
if (is_null($overwrite) || !is_bool($overwrite)) {
$overwrite = $this->_overwrite;
}
/*
* $files must be an array of filenames. Verify that it is an array with
* at least one file to copy.
*/
if (is_array($files) && count($files) > 0)
{
foreach ($files as $file)
{
// Get the source and destination paths
$filesource = JPath::clean($file['src']);
$filedest = JPath::clean($file['dest']);
$filetype = array_key_exists('type', $file) ? $file['type'] : 'file';
if (!file_exists($filesource)) {
/*
* The source file does not exist. Nothing to copy so set an error
* and return false.
*/
JError::raiseWarning(1, 'JInstaller::install: '.JText::sprintf('File does not exist', $filesource));
return false;
} elseif (file_exists($filedest) && !$overwrite) {
/*
* It's okay if the manifest already exists
*/
if ($this->getPath( 'manifest' ) == $filesource) {
continue;
}
/*
* The destination file already exists and the overwrite flag is false.
* Set an error and return false.
*/
JError::raiseWarning(1, 'JInstaller::install: '.JText::sprintf('WARNSAME', $filedest));
return false;
} else {
// Copy the folder or file to the new location.
if ( $filetype == 'folder') {
if (!(JFolder::copy($filesource, $filedest, null, $overwrite))) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::sprintf('Failed to copy folder to', $filesource, $filedest));
return false;
}
$step = array ('type' => 'folder', 'path' => $filedest);
} else {
if (!(JFile::copy($filesource, $filedest))) {
JError::raiseWarning(1, 'JInstaller::install: '.JText::sprintf('Failed to copy file to', $filesource, $filedest));
return false;
}
$step = array ('type' => 'file', 'path' => $filedest);
}
/*
* Since we copied a file/folder, we want to add it to the installation step stack so that
* in case we have to roll back the installation we can remove the files copied.
*/
$this->_stepStack[] = $step;
}
}
} else {
/*
* The $files variable was either not an array or an empty array
*/
return false;
}
return count($files);
}
/**
* Method to parse through a files element of the installation manifest and remove
* the files that were installed
*
* @access public
* @param object $element The xml node to process
* @param int $cid Application ID of application to remove from
* @return boolean True on success
* @since 1.5
*/
function removeFiles($element, $cid=0)
{
// Initialize variables
$removefiles = array ();
$retval = true;
// Get the client info
jimport('joomla.application.helper');
$client =& JApplicationHelper::getClientInfo($cid);
if (!is_a($element, 'JSimpleXMLElement') || !count($element->children())) {
// Either the tag does not exist or has no children therefore we return zero files processed.
return true;
}
// Get the array of file nodes to process
$files = $element->children();
if (count($files) == 0) {
// No files to process
return true;
}
/*
* Here we set the folder we are going to remove the files from. There are a few
* special cases that need to be considered for certain reserved tags.
*/
switch ($element->name())
{
case 'media':
if ($element->attributes('destination')) {
$folder = $element->attributes('destination');
} else {
$folder = '';
}
$source = $client->path.DS.'media'.DS.$folder;
break;
case 'languages':
$source = $client->path.DS.'language';
break;
default:
if ($client) {
$pathname = 'extension_'.$client->name;
$source = $this->getPath($pathname);
} else {
$pathname = 'extension_root';
$source = $this->getPath($pathname);
}
break;
}
// Process each file in the $files array (children of $tagName).
foreach ($files as $file)
{
/*
* If the file is a language, we must handle it differently. Language files
* go in a subdirectory based on the language code, ie.
*
* <language tag="en_US">en_US.mycomponent.ini</language>
*
* would go in the en_US subdirectory of the languages directory.
*/
if ($file->name() == 'language' && $file->attributes('tag') != '') {
$path = $source.DS.$file->attributes('tag').DS.basename($file->data());
// If the language folder is not present, then the core pack hasn't been installed... ignore
if (!JFolder::exists(dirname($path))) {
continue;
}
} else {
$path = $source.DS.$file->data();
}
/*
* Actually delete the files/folders
*/
if (is_dir($path)) {
$val = JFolder::delete($path);
} else {
$val = JFile::delete($path);
}
if ($val === false) {
$retval = false;
}
}
return $retval;
}
/**
* Copies the installation manifest file to the extension folder in the given client
*
* @access public
* @param int $cid Where to copy the installfile [optional: defaults to 1 (admin)]
* @return boolean True on success, False on error
* @since 1.5
*/
function copyManifest($cid=1)
{
// Get the client info
jimport('joomla.application.helper');
$client =& JApplicationHelper::getClientInfo($cid);
$path['src'] = $this->getPath('manifest');
if ($client) {
$pathname = 'extension_'.$client->name;
$path['dest'] = $this->getPath($pathname).DS.basename($this->getPath('manifest'));
} else {
$pathname = 'extension_root';
$path['dest'] = $this->getPath($pathname).DS.basename($this->getPath('manifest'));
}
return $this->copyFiles(array ($path), true);
}
/**
* Tries to find the package manifest file
*
* @access private
* @return boolean True on success, False on error
* @since 1.0
*/
function _findManifest()
{
// Get an array of all the xml files from teh installation directory
$xmlfiles = JFolder::files($this->getPath('source'), '.xml$', 1, true);
// If at least one xml file exists
if (!empty($xmlfiles)) {
foreach ($xmlfiles as $file)
{
// Is it a valid joomla installation manifest file?
$manifest = $this->_isManifest($file);
if (!is_null($manifest)) {
// If the root method attribute is set to upgrade, allow file overwrite
$root =& $manifest->document;
if ($root->attributes('method') == 'upgrade') {
$this->_overwrite = true;
}
// Set the manifest object and path
$this->_manifest =& $manifest;
$this->setPath('manifest', $file);
// Set the installation source path to that of the manifest file
$this->setPath('source', dirname($file));
return true;
}
}
// None of the xml files found were valid install files
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('ERRORNOTFINDJOOMLAXMLSETUPFILE'));
return false;
} else {
// No xml files were found in the install folder
JError::raiseWarning(1, 'JInstaller::install: '.JText::_('ERRORXMLSETUP'));
return false;
}
}
/**
* Is the xml file a valid Joomla installation manifest file
*
* @access private
* @param string $file An xmlfile path to check
* @return mixed A JSimpleXML document, or null if the file failed to parse
* @since 1.5
*/
function &_isManifest($file)
{
// Initialize variables
$null = null;
$xml =& JFactory::getXMLParser('Simple');
// If we cannot load the xml file return null
if (!$xml->loadFile($file)) {
// Free up xml parser memory and return null
unset ($xml);
return $null;
}
/*
* Check for a valid XML root tag.
* @todo: Remove backwards compatability in a future version
* Should be 'install', but for backward compatability we will accept 'mosinstall'.
*/
$root =& $xml->document;
if (!is_object($root) || ($root->name() != 'install' && $root->name() != 'mosinstall')) {
// Free up xml parser memory and return null
unset ($xml);
return $null;
}
// Valid manifest file return the object
return $xml;
}
}