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<?php
/*
SmartLine 0.1
http://www.espace-win.org/EWOSP/SmartLine
(c) 2007 Espace Win Open Source Project, some rights reserved.
Released under BSD License
Developer leader: S饕astien Santoro aka Dereckson
http://purl.espace-win.org/Who/Dereckson
Support: http://purl.espace-win.org/EWOSP/Support
0.1 2007-07-28 01:36 [DcK] Initial release
*/
///////////////////////////////////////////////////////////////////////////////
// SECTION I - INITIALIZATION
///////////////////////////////////////////////////////////////////////////////
//Constants
if (!defined('STDOUT')) define('STDOUT', 1, true);
if (!defined('STDERR')) define('STDERR', -1, true);
///////////////////////////////////////////////////////////////////////////////
// SECTION Ibis - L10n
///////////////////////////////////////////////////////////////////////////////
//Assumes $lang is a standard array
if (empty($lang) || !is_array($lang)) {
$lang = array();
}
$lang = array_merge($lang, array(
//Errors
'InvalidCommand' => "Invalid command %s. Use <strong>showcommands</strong> to show all commands.",
'RegisteredButNotExistingCommand' => "[CRITICAL ERROR] The command %s has correctly been registered but its method or class doesn't exist.",
'NotYetHelpForThiscommand' => "This command hasn't been documented yet.",
//Help
'DefaultHelp' => "This SmartLine is a command line interface.
<br /><br /><strong>showcommands</strong> prints the list.
<br /><strong>help &lt;command&gt;</strong> prints help for this command.",
'Help' => array(
'help' => "<strong>help &lt;command&gt;</strong> prints command help.",
'showcommands' => 'show available commands'
)
));
///////////////////////////////////////////////////////////////////////////////
// SECTION II - HELPERS FUNCTIONS
///////////////////////////////////////////////////////////////////////////////
//Error Handler
function SmartLineHandler($level, $error, $file, $line) {
switch ($level) {
case E_NOTICE:
$type = 'Notice';
break;
CASE E_WARNING:
$type = 'Warning';
break;
CASE E_ERROR:
$type = 'Error';
break;
default:
$type = "#$level";
}
$_SESSION['SmartLineOutput'][STDERR][] = "[PHP $type] $error ";
return true;
}
///////////////////////////////////////////////////////////////////////////////
// SECTION III - BASE CLASSES
///////////////////////////////////////////////////////////////////////////////
//SmartLineCommand is a class implemanting a SmartLine command.
//If you want to create a more complex command, extends this class.
class SmartLineCommand {
public function __construct ($SmartLine) {
$this->SmartLine = $SmartLine;
}
//Gets command help
//Returns help text to print
//Returns false for default behavior
//(ie prints $lang['Help'][$command])
public function help () {
return false;
}
//Runs command
//$argv is an array containing args, $argc = count($argv)
public function run ($argv, $argc) {
}
//Gets the SmartLine where this instance of the command is registered
public $SmartLine;
}
//This class represents a SmartLine instance.
//If you use only register_object, you can use it directly
//If you use register_method, extends this class in your SmartLine.
class SmartLine {
public function __construct () {
//Assumes we've an empty array where store registered commands.
$this->commands = array();
//Let's register standard commands
$this->register_object('showcommands', 'ShowCommandsSmartLineCommand');
$this->register_object('help', 'HelpSmartLineCommand');
}
//Registers a private method as command
public function register_method ($command, $function = null, $useArgvArgc = false) {
if (is_null($function)) $function = $command;
if (!method_exists($this, $function)) {
$this->lastError = "Registration failed. Unknown method $function";
return false;
}
$className = ucfirst($function) . 'SmartLineCommand';
//If class exists, add a uniqid after function
while (class_exists($className)) {
$className = uniqid(ucfirst($function)) . 'SmartLineCommand';
}
//Creates the class
if ($useArgvArgc) {
$call = "$this->SmartLine->$function(\$argv, \$argc);";
} else {
//We don't know how many args we've, so we use call_user_func_array
$call = "array_shift(\$argv);
call_user_func_array(
array(&\$this->SmartLine, '$function'),
\$argv
);";
}
$code = "class $className extends SmartLineCommand {
public function run (\$argv, \$argc) {
$call
}
}";
eval($code);
$this->register_object($command, $className);
return true;
}
//Registers an object extending SmartLineCommand as command
public function register_object ($command, $object) {
if (is_object($object)) {
//Sets SmartLine property
$object->SmartLine = $this;
} elseif (is_string($object)) {
//Creates a new instance of $object
$object = new $object($this);
} else {
$this->lastError = "Registration failed. register_object second parameter must be a class name (string) or an already initialized instance of such class (object) and not a " . gettype($object);
return false;
}
if (!$this->caseSensitive) $command = strtolower($command);
$this->commands[$command] = $object;
return true;
}
//Returns true if $command has been registred
public function isRegistered ($command) {
if (!$this->caseSensitive) $command = strtolower($command);
return array_key_exists($command, $this->commands);
}
//Executes an expression
public function execute ($expression) {
//Does nothing if blank line
if (!$expression) return;
//Prepares $argv and $argc
$argv = $this->expression2argv($expression);
$argc = count($argv);
//Gets command
$command = $this->caseSensitive ? $argv[0] : strtolower($argv[0]);
//If command doesn't exist, throws an error
if (!array_key_exists($command, $this->commands)) {
global $lang;
$this->puts(sprintf($lang['InvalidCommand'], $command), STDERR);
return false;
}
//Executes command, intercepting error and returns result
set_error_handler("SmartLineHandler");
$result = $this->commands[$command]->run($argv, $argc);
restore_error_handler();
return $result;
}
public function puts ($message, $output = STDOUT) {
//Adds message to current output queue
$_SESSION['SmartLineOutput'][$output][] = $message;
}
public function truncate ($output = STDOUT) {
unset($_SESSION['SmartLineOutput'][$output]);
}
public function gets ($output = STDOUT) {
if (count($_SESSION['SmartLineOutput'][$output] > 0))
return array_pop($_SESSION['SmartLineOutput'][$output]);
}
public function count ($output = STDOUT) {
return count($_SESSION['SmartLineOutput'][$output]);
}
public function gets_all ($output = STDOUT, $prefix = '<p>', $suffix = '</p>') {
$count = count($_SESSION['SmartLineOutput'][$output]);
if ($count == 0) return;
for ($i = 0 ; $i < $count ; $i++)
$buffer .= $prefix . $_SESSION['SmartLineOutput'][$output][$i] . $suffix;
unset ($_SESSION['SmartLineOutput'][$output]);
return $buffer;
}
public function prints_all ($output = STDOUT, $prefix = '<p>', $suffix = '</p>') {
$count = count($_SESSION['SmartLineOutput'][$output]);
if ($count == 0) return;
for ($i = 0 ; $i < $count ; $i++)
echo $prefix, $_SESSION['SmartLineOutput'][$output][$i], $suffix;
unset ($_SESSION['SmartLineOutput'][$output]);
}
public function gethelp ($command) {
return $this->commands[$command]->help();
}
private function expression2argv ($expression) {
//Checks if expression contains "
$pos1 = strpos($expression, '"');
//We isolate "subexpression"
if ($pos1 !== false) {
$pos2 = $pos1;
do {
$pos2 = strpos($expression, '"', $pos2 + 1);
} while ($pos2 !== false && ($expression[$pos2 - 1] == "\\" && $expression[$pos2 - 2] != "\\"));
if ($pos2 === false) {
//If final quote is missing, throws a warning and autoadds it.
$this->puts("[Warning] Final \" missing in $expression.", STDERR);
$argv = $this->expression2argv(substr($expression, 0, $pos1));
$argv[] = substr($expression, $pos1 + 1);
return $argv;
}
return array_merge(
$this->expression2argv(substr($expression, 0, $pos1)),
array(substr($expression, $pos1 + 1, $pos2 - $pos1 - 1)),
$this->expression2argv(substr($expression, $pos2 + 1))
);
}
//Standard expression (ie without ")
$argv = array();
$items = explode(' ', $expression);
foreach ($items as $item) {
$item = trim($item);
if (!$item) {
//blank, we ignore
continue;
}
$argv[] = $item;
}
return $argv;
}
//Contains last error
public $lastError = '';
//If true, command isn't equal to Command
public $caseSensitive = true;
}
///////////////////////////////////////////////////////////////////////////////
// SECTION IV - STANDARD COMMANDS
///////////////////////////////////////////////////////////////////////////////
/*
* These commands are availaible in all default smartlines instance
*/
//Standard command "showcommands"
class ShowCommandsSmartLineCommand extends SmartLineCommand {
public function run ($argv, $argc) {
$commands = array_keys($this->SmartLine->commands);
sort($commands);
$this->SmartLine->puts(implode(' ', $commands));
}
}
//Standard command "help"
class HelpSmartLineCommand extends SmartLineCommand {
public function run ($argv, $argc) {
global $lang;
if ($argc == 1) {
$this->SmartLine->puts($lang['DefaultHelp']);
} elseif (!$this->SmartLine->isRegistered($argv[1])) {
$this->SmartLine->puts(sprintf($lang['InvalidCommand'], str_replace(' ', '&nbsp;', $argv[1])), STDERR);
} else {
$command = strtolower($argv[1]);
if (!$help = $this->SmartLine->gethelp($command)) {
if (array_key_exists($command, $lang['Help'])) {
$help = $lang['Help'][$command];
} else {
$help = $lang['NotYetHelpForThiscommand'];
}
}
$this->SmartLine->puts($help);
}
}
}
///////////////////////////////////////////////////////////////////////////////
?>

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