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<?php
/**
* PEAR_Frontend, the singleton-based frontend for user input/output
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category pear
* @package PEAR
* @author Greg Beaver <cellog@php.net>
* @copyright 1997-2006 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: Frontend.php,v 1.9 2006/03/03 13:13:07 pajoye Exp $
* @link http://pear.php.net/package/PEAR
* @since File available since Release 1.4.0a1
*/
/**
* Which user interface class is being used.
* @var string class name
*/
$GLOBALS['_PEAR_FRONTEND_CLASS'] = 'PEAR_Frontend_CLI';
/**
* Instance of $_PEAR_Command_uiclass.
* @var object
*/
$GLOBALS['_PEAR_FRONTEND_SINGLETON'] = null;
/**
* Singleton-based frontend for PEAR user input/output
*
* Note that frontend classes must implement userConfirm(), and shoul implement
* displayFatalError() and outputData()
* @category pear
* @package PEAR
* @author Greg Beaver <cellog@php.net>
* @copyright 1997-2006 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.4.11
* @link http://pear.php.net/package/PEAR
* @since Class available since Release 1.4.0a1
*/
class PEAR_Frontend extends PEAR
{
/**
* Retrieve the frontend object
* @return PEAR_Frontend_CLI|PEAR_Frontend_Web|PEAR_Frontend_Gtk
* @static
*/
function &singleton($type = null)
{
if ($type === null) {
if (!isset($GLOBALS['_PEAR_FRONTEND_SINGLETON'])) {
$a = false;
return $a;
}
return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
} else {
$a = PEAR_Frontend::setFrontendClass($type);
return $a;
}
}
/**
* Set the frontend class that will be used by calls to {@link singleton()}
*
* Frontends are expected to conform to the PEAR naming standard of
* _ => DIRECTORY_SEPARATOR (PEAR_Frontend_CLI is in PEAR/Frontend/CLI.php)
* @param string $uiclass full class name
* @return PEAR_Frontend
* @static
*/
function &setFrontendClass($uiclass)
{
if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&
is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], $uiclass)) {
return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
}
if (!class_exists($uiclass)) {
$file = str_replace('_', '/', $uiclass) . '.php';
if (PEAR_Frontend::isIncludeable($file)) {
include_once $file;
}
}
if (class_exists($uiclass)) {
$obj = &new $uiclass;
// quick test to see if this class implements a few of the most
// important frontend methods
if (method_exists($obj, 'userConfirm')) {
$GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$obj;
$GLOBALS['_PEAR_FRONTEND_CLASS'] = $uiclass;
return $obj;
} else {
$err = PEAR::raiseError("not a frontend class: $uiclass");
return $err;
}
}
$err = PEAR::raiseError("no such class: $uiclass");
return $err;
}
/**
* Set the frontend class that will be used by calls to {@link singleton()}
*
* Frontends are expected to be a descendant of PEAR_Frontend
* @param PEAR_Frontend
* @return PEAR_Frontend
* @static
*/
function &setFrontendObject($uiobject)
{
if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&
is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], get_class($uiobject))) {
return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
}
if (!is_a($uiobject, 'PEAR_Frontend')) {
$err = PEAR::raiseError('not a valid frontend class: (' .
get_class($uiobject) . ')');
return $err;
}
// quick test to see if this class implements a few of the most
// important frontend methods
if (method_exists($uiobject, 'userConfirm')) {
$GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$uiobject;
$GLOBALS['_PEAR_FRONTEND_CLASS'] = get_class($uiobject);
return $uiobject;
} else {
$err = PEAR::raiseError("not a value frontend class: (" . get_class($uiobject)
. ')');
return $err;
}
}
/**
* @param string $path relative or absolute include path
* @return boolean
* @static
*/
function isIncludeable($path)
{
if (file_exists($path) && is_readable($path)) {
return true;
}
$ipath = explode(PATH_SEPARATOR, ini_get('include_path'));
foreach ($ipath as $include) {
$test = realpath($include . DIRECTORY_SEPARATOR . $path);
if (!$test) { // support wrappers like phar (realpath just don't work with them)
$test = $include . DIRECTORY_SEPARATOR . $path;
}
if (file_exists($test) && is_readable($test)) {
return true;
}
}
return false;
}
/**
* @param PEAR_Config
*/
function setConfig(&$config)
{
}
/**
* This can be overridden to allow session-based temporary file management
*
* By default, all files are deleted at the end of a session. The web installer
* needs to be able to sustain a list over many sessions in order to support
* user interaction with install scripts
*/
function addTempFile($file)
{
$GLOBALS['_PEAR_Common_tempfiles'][] = $file;
}
function log($msg, $append_crlf = true)
{
}
}
?>
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