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<?php
/**
* File containing the ezcBaseMetaDataTarballReader class.
*
* @package Base
* @version 1.8
* @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
*/
/**
* Base class implements ways of fetching information about the installed
* eZ Components when installed as tarball.
*
* @package Base
* @version 1.8
* @mainclass
*/
class ezcBaseMetaDataTarballReader
{
/**
* Contains the handler to the XML file containing the release information.
* @var SimpleXmlElement
*/
private $xml;
/**
* Creates the reader object and opens the release-info file.
*/
public function __construct()
{
$filename = dirname( __FILE__ ) . '/../../../release-info.xml';
$this->xml = simplexml_load_file( $filename );
}
/**
* Returns the version string for the installed eZ Components bundle.
*
* A version string such as "2008.2.2" is returned.
*
* @return string
*/
public function getBundleVersion()
{
return (string) $this->xml->version;
}
/**
* Returns a PHP version string that describes the required PHP version for
* this installed eZ Components bundle.
*
* @return string
*/
public function getRequiredPhpVersion()
{
return (string) $this->xml->deps->php;
}
/**
* Returns whether $componentName is installed
*
* Returns true for every component that exists (because all of them are
* then available).
*
* @return bool
*/
public function isComponentInstalled( $componentName )
{
$root = $this->xml->deps->packages->package;
foreach ( $root as $package )
{
if ( (string) $package['name'] == $componentName )
{
return true;
}
}
return false;
}
/**
* Returns the version string of the available $componentName or false when
* the component is not installed.
*
* @return string
*/
public function getComponentVersion( $componentName )
{
$root = $this->xml->deps->packages->package;
foreach ( $root as $package )
{
if ( (string) $package['name'] == $componentName )
{
return (string) $package['version'];
}
}
return false;
}
/**
* Returns a list of components that $componentName depends on.
*
* If $componentName is left empty, all installed components are returned.
*
* The returned array has as keys the component names, and as values the
* version of the components. It returns null of the $componentName
* is not found.
*
* @return array(string=>string).
*/
public function getComponentDependencies( $componentName = null )
{
$baseVersion = false;
$root = $this->xml->deps->packages;
$found = $componentName === null ? true : false;
// in case $componentName != null, we loop through all the components
// in the file, and figure out the new root that we can list dependency
// packages from.
foreach ( $root->package as $package )
{
if ( (string) $package['name'] == 'Base' )
{
$baseVersion = $package['version'];
}
if ( !$found && (string) $package['name'] == $componentName )
{
$root = $package->deps;
$found = true;
}
}
if ( !$found )
{
return null;
}
// We always add the Base dependency even though it's not in the dependency file.
$deps = array();
$deps['Base'] = (string) $baseVersion;
if ( !isset( $root->package ) )
{
return $deps;
}
foreach ( $root->package as $package )
{
$deps[(string) $package['name']] = (string) $package['version'];
}
return $deps;
}
}
?>
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