<?php
/*
 *	--------------------------------------------------------------------------------------------------------------------------
 *	Program			: HTML Form Field Generator, PHP Class Library
 *	Files			: htmlform.inc.php, htmlform_base.inc.php, htmlform_exc.inc.php
 *	Author			: Lasantha Samarakoon
 *	Date released	: Monday, September 21, 2009
 *	Email			: hide@address.com
 *	Licence			: http://www.gnu.org/licenses/gpl.txt
 *	--------------------------------------------------------------------------------------------------------------------------
 *
 *	This program is a freeware, which falls under GNU Genral Public Licence.
 *	---------------------------------------------------------------------------------------------------------------------------
 *	You can modify this program, without any permission from the author. But be kind enough to send the updated version to the
 *	author through the above mentioned Email address.
 *	---------------------------------------------------------------------------------------------------------------------------
 *	Documentation:
 *			Please refer the test.php file for hints on the usage of this class library.
 *	---------------------------------------------------------------------------------------------------------------------------
 *	************************************* PROUD TO BE A SRI LANKAN...!!! ******************************************************
 */
 
require_once 'htmlform_exc.inc.php';

interface IGeneratable {	

	// this function is used to generate html coding.
	function generate();
}

// this is the base class for all form fields except checkbox and radio
abstract class FormField {

	protected $_name = null;
	protected $_id = null;
	protected $_class = null;
	protected $_disabled = false;
	
	// constructor
	function __construct($name = null, $id = null, $class = null, $disabled = false) {
		
		$this->_name = $name;
		$this->_id = $id;
		$this->_class = $class;
		$this->set_disabled($disabled);
	}
	
	//getters
	function get_name() 	{return $this->_name;}
	function get_id() 		{return $this->_id;}
	function get_class() 	{return $this->_class;}
	function get_disabled()	{return $this->_disabled;}
	
	//setters
	function set_name($val) 	{$this->_name = $val;}
	function set_id($val) 		{$this->_id = $val;}
	function set_class($val)	{$this->_class = $val;}
	function set_disabled($val) {
	
		// check whether the parameter is boolean, else throw an exception
		if(is_bool($val))
			$this->_disabled = $val;
		else
			throw new InvalidParameterException("boolean (true or false)");
	}
}
// this is the base class for text, password and hidden fields
abstract class TextFieldBase extends FormField {
	
	private $_value = null;
	
	// constructor
	function __construct($name = null, $id = null, $value = null, $class = null, $disabled = false) {
		// invoke super class constructor
		parent::__construct($name, $id, $class, $disabled);
		
		$this->set_value($value);
	}
	
	//getters
	function get_value() {return $this->_value;}
	
	//setters
	function set_value($val) {$this->_value = $val;}
	
	
	function generate_field($type) {
		
		$r = "<input type=\"$type\"";
		// check for available attributes
		if($this->_name != null) $r .= " name=\"{$this->_name}\"";
		if($this->_id != null) $r .= " id=\"{$this->_id}\"";
		if($this->_class != null) $r .= " class=\"{$this->_class}\"";
		if($this->_value != null) $r .= " value=\"{$this->_value}\"";
		if($this->_disabled == true) $r .= " disabled=\"disabled\"";
		
		$r .= " />\n";
		// return html code
		return $r;
	}
}
// this is the base class for checkbox and radio
abstract class CheckboxBase extends FormField {
	
	private $_checked = false;
	
	//constructor
	function __construct($name = null, $id = null, $checked = false, $class = null, $disabled = false) {
		// invoke super class constructor
		parent::__construct($name, $id, $class, $disabled);
		
		$this->set_checked($checked);
	}
	
	//getters
	function get_checked() {return $this->_checked;}
	
	//setters
	function set_checked($val) {
	
		// check whether the parameter is boolean, else throw an exception
		if(is_bool($val))
			$this->_checked = $val;
		else
			throw new InvalidParameterException("boolean (true or false)");
	}
		
	function generate_field($type) {
		
		$r = "<input type=\"$type\"";
		// check for available attributes
		if($this->_name != null) $r .= " name=\"{$this->_name}\"";
		if($this->_id != null) $r .= " id=\"{$this->_id}\"";
		if($this->_class != null) $r .= " class=\"{$this->_class}\"";
		if($this->_checked == true) $r .= " checked=\"checked\"";
		if($this->_disabled == true) $r .= " disabled=\"disabled\"";
		
		$r .= " />\n";
		// return htm code
		return $r;
	}
}

// this is the base class for all buttons
abstract class ButtonBase extends FormField {

	private $_value = null;
	// constructor 
	function __construct($name = null, $id = null, $value = null, $class = null, $disabled = false) {
		// invoke super class constructor
		parent::__construct($name, $id, $class, $disabled);
		
		$this->set_value($value);
	}
	
	//getters
	function get_value() {return $this->_value;}
	
	//setters
	function set_value($val) {$this->_value = $val;}
	
	function generate_field($type) {
		
		$r = "<button type=\"$type\"";
		// check for available attributes
		if($this->_name != null) $r .= " name=\"{$this->_name}\"";
		if($this->_id != null) $r .= " id=\"{$this->_id}\"";
		if($this->_class != null) $r .= " class=\"{$this->_class}\"";
		if($this->_disabled == true) $r .= " disabled=\"disabled\"";
		
		$r .= ">{$this->_value}</button>\n";
		// return html code
		return $r;
	}
}
?>