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Chain.php
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Chain.php
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<?php
interface ICommand
{
public function onCommand($name, $args);
}
class CommandChain
{
private $_commands = array();
public function addCommand($cmd)
{
$this->_commands [] = $cmd;
}
public function runCommand($name, $args)
{
foreach ($this->_commands as $cmd) {
if ($cmd->onCommand($name, $args)) {
return;
}
}
}
}
class UserCommand implements ICommand
{
public function onCommand($name, $args)
{
if ($name != 'addUser') {
return false;
}
echo "UserCommand handling 'addUser'\n";
return true;
}
}
class MailCommand implements ICommand
{
public function onCommand($name, $args)
{
if ($name != 'mail') {
return false;
}
echo "MailCommand handling 'mail'\n";
return true;
}
}
$cc = new CommandChain();
$cc->addCommand(new UserCommand());
$cc->addCommand(new MailCommand());
$cc->runCommand('addUser', null);
$cc->runCommand('mail', null);
// vim600:ts=4 st=4 foldmethod=marker foldmarker=<<<,>>>
// vim600:syn=php commentstring=//%s