<?
/* ================================================================================

	This code is copyright of and owned by Dutch Web Promotion.
	This code may NOT be modified, copied or used without prior permission.
	This notice MUST stay intact for legal use.

	Visit www.dutchwebpromotion.info for more information.

================================================================================ */
if (!defined('DWP')) die('ERROR 1000');


include_once INCLUDE_FORM_FUNCTIONS;


class c_form{

	var $debug;								// true = do not mail
	var $debug_die;							// true = dump email on screen and die
	var $website;
	var $body_header;						// use function add_body_header($text)
	var $body_footer;						// use function add_body_footer($text)
	var $standard_subject;
	var $html_on;
	var $html_style;
	var $sender;
	var $form_sender;

	var $send_confirmation;
	var $confirmation_content;
	var	$confirmation_mail;
	var $confirmation_mail_sender;
	var	$mail_subject;
	var	$mail_subject_confirm;

	var $style_prefix_table_wrapper;
	var $style_prefix_table;
	var $style_prefix_td;
	var $style_prefix_td_label;
	var $style_prefix_p;

	var $website_email;						// as sender for confirmation email


	function c_form(){
		if (!isset($_SESSION)) session_start();		// for storing the verification | anti spam code

		$this->code_len =						4; // length of verification code

		$this->debug =							false;
		$this->debug_die =						false;
		$this->website =						'';
		$this->body_header =					'';
		$this->body_footer =					'';
		//
		$this->standard_subject =				'Online mailformulier';
		// html
		$this->html_on =						false;
		$this->html_style =						'';

		$this->send_confirmation =				false;
		$this->confirmation_content =			'';
		$this->sender =							false; // set later
		$this->form_sender =					false; // set later
		$this->use_this_sender =				false; // can be set with a valid emailadres ()
		$this->confirmation_mail =				"Bedankt voor uw bericht.\n\n\n";
		$this->confirmation_mail_sender =		'no-reply';
		$this->mail_subject =					'bericht';
		$this->mail_subject_confirm =			'verzendbevestiging';
		$this->show_errors =					false; // debug: show errors when processing form
		$this->show_post =						false; // debug: show $_POST values
		$this->check_code =						true;

		// html tags and styles
		$this->style_prefix_table_wrapper =		'align="center" style="border-collapse:collapse; width:800px;" ';
		$this->style_prefix_table =				'style="border-collapse:collapse;" ';
		$this->style_prefix_td =				'valign="top" style="font-family:Verdana; font-size:12px; padding:2px 8px 4px 0;" ';
		$this->style_prefix_td_label =			'valign="top" style="font-family:Verdana; font-size:12px; padding:2px 8px 4px 0; color:#909090" ';
		$this->style_prefix_p =					'style="font-family:Verdana; font-size:12px; color:#a0a0a0;" ';


		//
		if (!isset($_SESSION['code']))
			$_SESSION['code'] = strtoupper(substr(md5(time()),0, $this->code_len));
	}


	/* --------------------------------------------------------------------------------
		Running this form
	-------------------------------------------------------------------------------- */
	function get_html_run_form(){
		if ($this->in_form()) {
			if ($errors = $this->validate()) {
				$html = $this->get_hml_mailform($errors, false);
			} else {
				if ($this->process())
					$html = $this->get_hml_mailform_success();
				else
					$html = $this->get_hml_mailform_failure();
			}
		} else {
			$html = $this->get_hml_mailform('', true);
		}
		return $html;
	}


	function get_hml_mailform() {
		// extend this class & function
		return;
	}


	function get_hml_mailform_success() {
		// extend this class & function
		return;
	}


	function get_hml_mailform_failure() {
		// extend this class & function
		return;
	}


	function get_html_table_wrapper_td_footer() {
		// extend this class & function
		return;
	}


	function get_html_table_wrapper_td_header() {
		// extend this class & function
		return;
	}


	function additional_subject() {
		// extend this class & function
		// add something extra to the email sent, like an order number
		return;
	}


	function send_additional_info() {
		// extend this class & function
		return;
	}


	/* --------------------------------------------------------------------------------
		Form handling
	-------------------------------------------------------------------------------- */
	function in_form(){
		if (array_key_exists('submit',$_POST))		// ???
			return true;
		else
			return false;
	}


	function add_mandatory_field($field){
		if (!isset($_POST[$field]) or empty($_POST[$field]))
			return "<input type=\"hidden\" name=\"$field\" value=\"\" />\n";
	}


	function add_recipients($recipients){
		// add 1 or more recipients to the mailform separate using a comma (,)
		$this->recipients = explode(',', $recipients);					// all recipients in an array
		$domain = explode('@',$this->recipients[0]);
		$this->domain = $domain[1];										// get domain of first email address
	}


	function add_body_header($text){
		$this->body_header .= $text;
	}


	function add_body_footer($text){
		$this->body_footer .= $text;
	}


	function add_body_footer_tracking(){
		// call this to add this footer to each mail
		$this->body_footer .=
				"\n\n\n\n\n".
				'<p '.$this->style_prefix_p.">\n".
				"<br />\n".
				"IP: {$_SERVER['REMOTE_ADDR']}<br />\n".
				"Host: ".gethostbyaddr($_SERVER['REMOTE_ADDR'])."\n".
				"</p>\n";
	}


	function add_body_footer_server_time(){
		// call this to add this footer to each mail
		$this->body_footer .=
				"Webservertijd: ".date("Y-m-d H:i")."\n";
	}


	function add_html_style($style=''){
		// obsolete
		if ($style) {
			$this->html_style .= "$style";
		} else {
			$this->html_style =
				"body, p, table		{ font-family:Verdana; font-size:12px; }\n".
				"table				{ border:0px solid; border-collapse:collapse; }\n".
				"td					{ padding:4px 10px 4px 0; vertical-align:top; }\n".
				"td.label			{ color:#909090; }\n";
		}
	}


	/* --------------------------------------------------------------------------------
		Engine
	-------------------------------------------------------------------------------- */
	function validate() {
		$this->validate_class();

		// array for error messages
		$error = array();

		// trim all values
		foreach($_POST as $key=> $value) $_POST[$key] = trim($value);

		// put array keys in an array
		$this->field_names = array_keys($_POST);

		// all keys in lowercase
		foreach($this->field_names as $key=>$value)
			$this->field_names[$key] = strtolower($value);

		// check mandatory fields
		foreach($_POST AS $key => $value) {
			$positie = strpos($key, '*');
			if($positie > 0) {
				if (empty($_POST[$key])) {
					$field_name = strtolower(substr($key, 0, $positie));		// veldnaam zonder sterretje
					$error[$field_name] = "Het veld <i>'".$field_name."'</i> is verplicht en moet worden ingevuld.";
				}
			}
		}

		// code verification
		if ($this->check_code) {
			$field_name  = 'code*';
			$field_name2 = 'code';	// remove star
			if (in_array($field_name, $this->field_names)) {
				$code_input = trim(strtoupper($_POST[$field_name]));
				if ($code_input and ($_SESSION['code'] != $code_input)) {
					$error[$field_name2] = 'Ingevoerde code is niet correct';
				} else {
					// error message will be given later because field is mandatory
				}
			} else {
				die('AE - veld voor invoer bevestigingscode bestaat niet');
			}
		}

		// look for other sender in $_POST
		if (in_array("mail",		$this->field_names)) { $field_name="mail";	$this->form_sender = $_POST['mail']; }
		elseif (in_array("email",	$this->field_names)) { $field_name="email";	$this->form_sender = $_POST['email']; }
		elseif (in_array("e-mail",	$this->field_names)) { $field_name="e-mail";$this->form_sender = $_POST['e-mail']; }
		elseif (in_array("mail*",	$this->field_names)) { $field_name="mail";	$this->form_sender = $_POST['mail*']; }
		elseif (in_array("email*",	$this->field_names)) { $field_name="email";	$this->form_sender = $_POST['email*']; }
		elseif (in_array("e-mail*",	$this->field_names)) { $field_name="e-mail";$this->form_sender = $_POST['e-mail*']; }
		else {
			$this->form_sender = "noreply@".$this->website;
			$bedankt_mail = FALSE;
		}
		if (!validate_email($this->form_sender)) $error[$field_name] = "Het opgegeven emailadres is niet geldig.";


		if ($this->use_this_sender)
			$this->sender = $this->use_this_sender;
		else
			$this->sender = $this->form_sender;
		return $error;
	}


	function validate_class(){
		// validate for fatal errors
		if (!isset($this->recipients[0]) or !validate_email($this->recipients[0])) {
			die("AE - Klasse [c_mail_form] heeft geen mail ontvangers [recipients].");
		}
		if (!validate_domain($this->website)) {
			die("AE - Klasse [c_mail_form] heeft geen geldig website domein.");
		}
	}


	function process_custom(){
		// extend this class & function
		return;
	}


	function process() {

		$this->validate_class();
		$this->process_custom();

		if ($this->mail_subject) {
			$subject = $this->mail_subject.$this->additional_subject();
		} else {
			if (in_array("onderwerp", $this->field_names)) { $subject = $_POST['onderwerp']; }
			elseif (in_array("subject",$this->field_names)) { $subject = $_POST['subject']; }
			elseif (in_array("onderwerp*",$this->field_names)) { $subject = $_POST['onderwerp*']; }
			elseif (in_array("subject*",$this->field_names)) { $subject = $_POST['subject*']; }
			else { $subject = $this->standard_subject; }
		}

		// construct headers (part 1)
		$headers = "MIME-Version: 1.0\r\n";
		$headers .= "From: {$this->sender}\r\n";
		$headers .= ($this->html_on) ? "Content-Type: text/html; charset=iso-8859-1\r\n" : "Content-Type: text/plain; charset=iso-8859-1\r\n";

		$content = $this->construct_content();

		// construct the body !!! changes body_confirmation also
		$body = $this->construct_body($content);


		foreach ($this->recipients as $recipient) {
			$recipient = trim($recipient);
			if ($this->debug)
				$result = true;
			else
				$result = mail($recipient, $subject, $body, $headers);

			$this->process_mail_result($result, $recipient, $subject, $body, $headers); // custom
			if (!$result) return false;
		}
		//
		if ($this->send_confirmation) {
			// construct headers (part 2 - different sender)
			$headers = "MIME-Version: 1.0\r\n";
			if (@$this->website_email)	$headers .= "From: {$this->website_email}\r\n";
			else						$headers .= "From: {$this->sender}\r\n";
			$headers .= ($this->html_on) ? "Content-Type: text/html; charset=iso-8859-1\r\n" : "Content-Type: text/plain; charset=iso-8859-1\r\n";

			// re-construct the body
			$body = $this->construct_body($this->confirmation_content.$content);
			$result = mail($this->form_sender, $this->mail_subject_confirm, $body, $headers);
			if (!$result) return false;
		}

		// processing succes
		unset($_SESSION['code']);
		return true;
	}


	function process_mail_result($result, $recipient, $subject, $body, $headers){
		// extend this class if necessary
	}


	function construct_body($content){
		$s =	$this->body_header.
				$content.
				$this->body_footer;
		if ($this->html_on) $s = $this->make_html_email($s);
		return $s;

	}


	function construct_content(){
		// add $_POST values in mail body, except the submit buttons
		$content = '';
		if ($this->html_on) $content .= '<table '.$this->style_prefix_table.">\n";
		foreach($_POST as $key => $value) {
			// skip fields with a ~
			if((strpos($key, '~')) === false) {
				// strip *
				if (strpos($key, '*')>0)
					$key = strtolower(substr($key, 0, strpos($key, '*')));

				// do not add buttons
				if (strtolower($key) != "submit") {

					/* step 1 */	$value = htmlspecialchars($value);					// do not allow tags
					/* step 2 */	if ($this->html_on) $value = nl2br($value);			// <br /> for textarea's
					if ($this->html_on) {
						$content .=
							"<tr>\n".
							"<td ".$this->style_prefix_td_label."class=\"label\">".ucfirst(strtolower($key)).": </td>\n".
							"<td ".$this->style_prefix_td.">".$value."</td>\n".
							"</tr>\n";
					} else {
						$content .= ucfirst(strtolower($key)).": ".$value."\n";
					}
				}
			}
		}
		if ($this->html_on) $content .= "</table>\n";
		$content .= $this->send_additional_info();
		return $content;
	}


	function make_html_email($text){
		/*
			gmail totally removes any <style> blocks. so use table wrapping
			new style as of 2008-11-29 (due to mobihair.nl udpates)
		*/
		$s =	'<table '.$this->style_prefix_table_wrapper.">\n".
				$this->get_html_table_wrapper_td_header().
				"<tr><td>\n".
				$text.
				"</td></tr>\n".
				$this->get_html_table_wrapper_td_footer().
				"</table>\n";

		if ($this->debug_die) die($s);
		return $s;
	}
}


?>