class.CommandMenu.php

<?php

/**
* Abstract class Command representing a command in a command menu
*/
class Command {
	var $text;
	var $enabled;
	
	function Command($text, $enabled) {
		$this->text = str_replace(" ", "&nbsp;", $text);
		$this->enabled = $enabled;
	}

	function toString() {
		if (!$this->enabled)
			return "<span class=\"command_current\">$this->text</span>";
		else
			return $this->text;
	}
	
	function setEnabled($enabled) {
		$this->enabled = $enabled;
	}
}

/*	A class which represents a single command in a command menu.
*		It has a url and a visual reprenstation (text)
*/
class TextCommand extends Command {
	var $url;
	
	/**
	* Constructor 
	*/
	function TextCommand($text, $enabled, $url) {
		parent::Command($text, $enabled);
		$this->url = $url;
	}
	
	function toString() {
		if (!$this->enabled)
			return parent::toString();
		else
			return "<a href=\"" . $this->url . "\" class=\"command\">" . $this->text . "</a>";
	}
}	

class IconTextCommand extends TextCommand {
	var $img;
	
	/**
	* Constructor 
	*/
	function IconTextCommand($text, $enabled, $url, $img) {
		parent::TextCommand($text, $enabled, $url);
		$this->img = $img;
	}
	
	function toString() {
		if (true)
			return parent::toString();
		else
			return "<img src=\"" . $this->img . "\" align=\"absbottom\">" . parent::toString();
	}
}

/*	A class representing a menu of commands.
*		It's responsible for printing the menu with a separator
*/
class CommandMenu	{		

	//array which holds the commands in the menu
	var $commands = array();

	/* adds a command to the menu	*/
	function add($command) {
		$this->commands[] = $command;
	}

	/* returns the command menu as html */
	function toString() {
		$printedFirstCommand = false;
		$returnString = "";
		
		//iterate through commands
		$count = count($this->commands);
		for ($i=0; $i < $count; $i++) {
			//only print the separator after printing the first command
			if ($printedFirstCommand)
				$returnString = $returnString . "&nbsp;&nbsp; ";
			else
				$printedFirstCommand = true;
			
			//append this command to the string
			$returnString = $returnString . $this->commands[$i]->toString();			
		}
		//return the command menu as a string
		return $returnString;
	}
	
	/**
	* Disables a menu command with the given text
	*/
	function disableCommand($text) {
		//iterate through commands
		$count = count($this->commands);
		for ($i=0; $i < $count; $i++) {
			if ($this->commands[$i]->text == $text)
				$this->commands[$i]->setEnabled(false);
		}		
	}
	
	function disableSelf() {
		//iterate through commands
		$count = count($this->commands);
		for ($i=0; $i < $count; $i++) {
			$self = $_SERVER["PHP_SELF"];
			$slashPos = strrpos($self, "/");
			if (!is_bool($slashPos))
				$self = substr($self, $slashPos + 1);
			$url = $this->commands[$i]->url;
			$pos = strpos($url, $self);
			if (!is_bool($pos) && $pos == 0)
				$this->commands[$i]->setEnabled(false);
		}			
	}
}

//create the command menu object so that those files which include this one dont need to
$commandMenu = new CommandMenu;
	
?>