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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available through the world-wide-web at the following url: |
// | 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 world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Author: Stig Bakken <ssb@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: Command.php,v 1.24 2004/05/16 15:43:30 pajoye Exp $
require_once "PEAR.php";
/**
* List of commands and what classes they are implemented in.
* @var array command => implementing class
*/
$GLOBALS['_PEAR_Command_commandlist'] = array();
/**
* List of shortcuts to common commands.
* @var array shortcut => command
*/
$GLOBALS['_PEAR_Command_shortcuts'] = array();
/**
* Array of command objects
* @var array class => object
*/
$GLOBALS['_PEAR_Command_objects'] = array();
/**
* Which user interface class is being used.
* @var string class name
*/
$GLOBALS['_PEAR_Command_uiclass'] = 'PEAR_Frontend_CLI';
/**
* Instance of $_PEAR_Command_uiclass.
* @var object
*/
$GLOBALS['_PEAR_Command_uiobject'] = null;
/**
* PEAR command class, a simple factory class for administrative
* commands.
*
* How to implement command classes:
*
* - The class must be called PEAR_Command_Nnn, installed in the
* "PEAR/Common" subdir, with a method called getCommands() that
* returns an array of the commands implemented by the class (see
* PEAR/Command/Install.php for an example).
*
* - The class must implement a run() function that is called with three
* params:
*
* (string) command name
* (array) assoc array with options, freely defined by each
* command, for example:
* array('force' => true)
* (array) list of the other parameters
*
* The run() function returns a PEAR_CommandResponse object. Use
* these methods to get information:
*
* int getStatus() Returns PEAR_COMMAND_(SUCCESS|FAILURE|PARTIAL)
* *_PARTIAL means that you need to issue at least
* one more command to complete the operation
* (used for example for validation steps).
*
* string getMessage() Returns a message for the user. Remember,
* no HTML or other interface-specific markup.
*
* If something unexpected happens, run() returns a PEAR error.
*
* - DON'T OUTPUT ANYTHING! Return text for output instead.
*
* - DON'T USE HTML! The text you return will be used from both Gtk,
* web and command-line interfaces, so for now, keep everything to
* plain text.
*
* - DON'T USE EXIT OR DIE! Always use pear errors. From static
* classes do PEAR::raiseError(), from other classes do
* $this->raiseError().
*/
class PEAR_Command
{
// {{{ factory()
/**
* Get the right object for executing a command.
*
* @param string $command The name of the command
* @param object $config Instance of PEAR_Config object
*
* @return object the command object or a PEAR error
*
* @access public
* @static
*/
function factory($command, &$config)
{
if (empty($GLOBALS['_PEAR_Command_commandlist'])) {
PEAR_Command::registerCommands();
}
if (isset($GLOBALS['_PEAR_Command_shortcuts'][$command])) {
$command = $GLOBALS['_PEAR_Command_shortcuts'][$command];
}
if (!isset($GLOBALS['_PEAR_Command_commandlist'][$command])) {
return PEAR::raiseError("unknown command `$command'");
}
$class = $GLOBALS['_PEAR_Command_commandlist'][$command];
if (!class_exists($class)) {
return PEAR::raiseError("unknown command `$command'");
}
$ui =& PEAR_Command::getFrontendObject();
$obj = &new $class($ui, $config);
return $obj;
}
// }}}
// {{{ & getFrontendObject()
/**
* Get instance of frontend object.
*
* @return object
* @static
*/
function &getFrontendObject()
{
if (empty($GLOBALS['_PEAR_Command_uiobject'])) {
$GLOBALS['_PEAR_Command_uiobject'] = &new $GLOBALS['_PEAR_Command_uiclass'];
}
return $GLOBALS['_PEAR_Command_uiobject'];
}
// }}}
// {{{ & setFrontendClass()
/**
* Load current frontend class.
*
* @param string $uiclass Name of class implementing the frontend
*
* @return object the frontend object, or a PEAR error
* @static
*/
function &setFrontendClass($uiclass)
{
if (is_object($GLOBALS['_PEAR_Command_uiobject']) &&
is_a($GLOBALS['_PEAR_Command_uiobject'], $uiclass)) {
return $GLOBALS['_PEAR_Command_uiobject'];
}
if (!class_exists($uiclass)) {
$file = str_replace('_', '/', $uiclass) . '.php';
if (PEAR_Command::isIncludeable($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')) {
$GLOBALS['_PEAR_Command_uiobject'] = &$obj;
$GLOBALS['_PEAR_Command_uiclass'] = $uiclass;
return $obj;
} else {
$err = PEAR::raiseError("not a frontend class: $uiclass");
return $err;
}
}
$err = PEAR::raiseError("no such class: $uiclass");
return $err;
}
// }}}
// {{{ setFrontendType()
// }}}
// {{{ isIncludeable()
/**
* @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 . $path);
if (file_exists($test) && is_readable($test)) {
return true;
}
}
return false;
}
/**
* Set current frontend.
*
* @param string $uitype Name of the frontend type (for example "CLI")
*
* @return object the frontend object, or a PEAR error
* @static
*/
function setFrontendType($uitype)
{
$uiclass = 'PEAR_Frontend_' . $uitype;
return PEAR_Command::setFrontendClass($uiclass);
}
// }}}
// {{{ registerCommands()
/**
* Scan through the Command directory looking for classes
* and see what commands they implement.
*
* @param bool (optional) if FALSE (default), the new list of
* commands should replace the current one. If TRUE,
* new entries will be merged with old.
*
* @param string (optional) where (what directory) to look for
* classes, defaults to the Command subdirectory of
* the directory from where this file (__FILE__) is
* included.
*
* @return bool TRUE on success, a PEAR error on failure
*
* @access public
* @static
*/
function registerCommands($merge = false, $dir = null)
{
if ($dir === null) {
$dir = dirname(__FILE__) . '/Command';
}
$dp = @opendir($dir);
if (empty($dp)) {
return PEAR::raiseError("registerCommands: opendir($dir) failed");
}
if (!$merge) {
$GLOBALS['_PEAR_Command_commandlist'] = array();
}
while ($entry = readdir($dp)) {
if ($entry{0} == '.' || substr($entry, -4) != '.php' || $entry == 'Common.php') {
continue;
}
$class = "PEAR_Command_".substr($entry, 0, -4);
$file = "$dir/$entry";
include_once $file;
// List of commands
if (empty($GLOBALS['_PEAR_Command_objects'][$class])) {
$GLOBALS['_PEAR_Command_objects'][$class] = &new $class($ui, $config);
}
$implements = $GLOBALS['_PEAR_Command_objects'][$class]->getCommands();
foreach ($implements as $command => $desc) {
$GLOBALS['_PEAR_Command_commandlist'][$command] = $class;
$GLOBALS['_PEAR_Command_commanddesc'][$command] = $desc;
}
$shortcuts = $GLOBALS['_PEAR_Command_objects'][$class]->getShortcuts();
foreach ($shortcuts as $shortcut => $command) {
$GLOBALS['_PEAR_Command_shortcuts'][$shortcut] = $command;
}
}
@closedir($dp);
return true;
}
// }}}
// {{{ getCommands()
/**
* Get the list of currently supported commands, and what
* classes implement them.
*
* @return array command => implementing class
*
* @access public
* @static
*/
function getCommands()
{
if (empty($GLOBALS['_PEAR_Command_commandlist'])) {
PEAR_Command::registerCommands();
}
return $GLOBALS['_PEAR_Command_commandlist'];
}
// }}}
// {{{ getShortcuts()
/**
* Get the list of command shortcuts.
*
* @return array shortcut => command
*
* @access public
* @static
*/
function getShortcuts()
{
if (empty($GLOBALS['_PEAR_Command_shortcuts'])) {
PEAR_Command::registerCommands();
}
return $GLOBALS['_PEAR_Command_shortcuts'];
}
// }}}
// {{{ getGetoptArgs()
/**
* Compiles arguments for getopt.
*
* @param string $command command to get optstring for
* @param string $short_args (reference) short getopt format
* @param array $long_args (reference) long getopt format
*
* @return void
*
* @access public
* @static
*/
function getGetoptArgs($command, &$short_args, &$long_args)
{
if (empty($GLOBALS['_PEAR_Command_commandlist'])) {
PEAR_Command::registerCommands();
}
if (!isset($GLOBALS['_PEAR_Command_commandlist'][$command])) {
return null;
}
$class = $GLOBALS['_PEAR_Command_commandlist'][$command];
$obj = &$GLOBALS['_PEAR_Command_objects'][$class];
return $obj->getGetoptArgs($command, $short_args, $long_args);
}
// }}}
// {{{ getDescription()
/**
* Get description for a command.
*
* @param string $command Name of the command
*
* @return string command description
*
* @access public
* @static
*/
function getDescription($command)
{
if (!isset($GLOBALS['_PEAR_Command_commanddesc'][$command])) {
return null;
}
return $GLOBALS['_PEAR_Command_commanddesc'][$command];
}
// }}}
// {{{ getHelp()
/**
* Get help for command.
*
* @param string $command Name of the command to return help for
*
* @access public
* @static
*/
function getHelp($command)
{
$cmds = PEAR_Command::getCommands();
if (isset($cmds[$command])) {
$class = $cmds[$command];
return $GLOBALS['_PEAR_Command_objects'][$class]->getHelp($command);
}
return false;
}
// }}}
}
?>
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