<?php

//========================[ Feedback class ]=======================
//
// 2003-feb-12, Ilya Nemihin (hide@address.com)
// License: free
//
// class Feedback make usecase 'Feedback':
//  1. showing form with fields for fill
//  2. when user press submit send that fields's values to specific email
//  3. show message 'Your info was sent'
//
//
// How to make it work:
//  1. set email address to which send information from web-form
//      in function Feedback()
//  2. set fields to show in function initFields()
//  3. change/translate messages in function initTexts()
//  [4]. if you change script's name (or directory), also change it
//        in function Feedback()
//
//
// Description:
// 
// there is one class Feedback, which use:
//   - class Request - to take values from GET/POST
//   - class EMailSender - to send email message
//
// class Feedback have two interfaces:
//  a) IView - return html form
//  b) IMakeFeedback - take values and send them to email
//
// and there is 2 scripts:
//  a) feedbackViewer.php (use IView) - show form 
//  b) feedbackController.php (use IMakeFeedback) -
//       perform taking from POST values,
//       and send them to email, and make redirect to
//       feedbackViewer.php with message 'ok' 
//

class Feedback{

  // names of php-scripts
  var $scriptViewer;  // are used in IView
  var $scriptController;  // are used in IMakeFeedback

  // email where we send information
  var $email; // are used in IMakeFeedback

  // body to sending in email
  var $body; // are used in IMakeFeedback

  // fields for show
  var $fields; // are used in both

  // class Request
  var $objRequest; // are used in both

  // class EMailSender
  var $objSender; // are used in IMakeFeedback

  // texts in class (for translation)
  var $texts;

//====[ constructor ] 
  function Feedback(){
    $this->scriptViewer = 'feedbackViewer.php';
    $this->scriptController = 'feedbackController.php';

    // set your email address
    $this->email = '';

    $this->objRequest = new Request();
    $this->objSender = new EMailSender();
    $this->initSender();

    $this->fields = array();
    $this->initFields();

    $this->texts = array();
    $this->initTexts();
  }

  // private (Constructor)
  function initFields(){
    $this->fields[ "name" ] = array( "descr" => 'Name', "type" => 'input', "params" => array( "size" => 20 ), "value" => '');
    $this->fields[ "email" ] = array( "descr" => 'E-mail', "type" => 'input', "params" => array( "size" => 20 ), "value" => '');
    $this->fields[ "feedback" ] = array( "descr" => 'Note', "type" => 'textarea', "params" => array( "cols" => 25, "rows" => 5 ), "value" => '');
  }

  // private (Constructor)
  function initTexts(){
    $this->texts[ "submit" ] = 'Send';  // text on submit button
    $this->texts[ "useCaseName" ] = 'Feedback';  // text over form ( are used in getTextHeader())
    $this->texts[ "messageOk" ] = 'You information was sent. Thanks.';  // message after sending information
    $this->texts[ "again" ] = 'Again';  // link to make else one feedback
    $this->texts[ "bodyheader" ] = 'Feedback information:'; // header in incoming email-message
  }

  // private (Constructor)
  function initSender(){
    $this->objSender->setEMail( $this->email );
  }

//====[ interface IView ]====
  function getView(){
    if ( $this->isModeForm() ){
      return $this->getForm();
    }
    else{
      return $this->getMessage();
    }
  }
//====[ end interface IView ]====

//====[ interface IMakeFeedback ]====
  function makeFeedback(){
    $this->initValuesFromRequest();
    $this->makeBody();
    $this->sendEMail();
    $this->redirect();
  }
//====[ end interface IMakeFeedback ]====

  // private (IView)
  function isModeForm(){
    // see redirect()
    $msg = $this->objRequest->getParam( 'resultOk' );
    if ( $msg == '' ){
      return true;
    }
    else{
      return false;
    }
  }

  // private (IView)
  function getForm(){
    $str = '';
    $str .= $this->getTextHeader();
    $str .= '<table align="center" cellpadding="10" cellspacing="1" bgcolor="000000"><tr><td bgcolor="#cccccc">';
    $str .= '<table align="center" bgcolor="#cccccc" cellpadding="3" cellspacing="0" border="0">'."\n";
    $str .= '<form method="post" action="'.$this->scriptController.'">'."\n";
    foreach( $this->fields as $name => $field ){
      $str .= '<tr>'."\n";
        $str .= '<td align="right" valign="top">';
        $str .= $field[ "descr" ].':';
        $str .= '</td>';
    
        $str .= '<td>';
        $str .= $this->getElement( $field[ "type" ], $name, $field[ "params" ] );
        $str .= '</td>';
    
      $str .= '</tr>'."\n";
    }
    $str .= '<tr>'."\n";
    $str .= '<td colspan="2" align="center"><hr noshade size="1"><input type="submit" value="'.$this->texts[ "submit" ].'"></td>';
    $str .= '</tr>'."\n";
    $str .= '</form>'."\n";
    $str .= '</table>'."\n";
    $str .= '</td></tr></table>';
    return $str;
  }

  // private (IView)
  function getMessage(){
    $str = '';
    $str .= $this->getTextHeader();
    $str .= '<p align="center">';
    $str .= $this->texts[ "messageOk" ];
    $str .= '<br><a href="'.$this->scriptViewer.'">'.$this->texts[ "again" ].'</a>';
    $str .= '</p>';
    return $str;
  }

  // private (IView)
  function getElement( $type, $name, $params ){
    $str = '';
    switch( $type ){
      case 'input':
        $str = '<input type="text" name="'.$name.'" size="'.$params[ "size" ].'">';
        break;
      case 'textarea':
        $str = '<textarea name="'.$name.'" cols="'.$params[ "cols" ].'" rows="'.$params[ "rows" ].'"></textarea>';
        break;
      default:
        $str = 'unknown element type';
    }
    return $str;
  }

  // private (IView)
  function getTextHeader(){
    $str = '';
    $str .= '<center>';
    $str .= '<h2>'.$this->texts[ "useCaseName" ].'</h2>';
    $str .= '</center>';
    return $str;
  }

  // private (IMakeFeedback)
  function initValuesFromRequest(){
    foreach( $this->fields as $name => $field){
      $this->fields[ $name ][ value ] = $this->objRequest->getParam( $name );
    }
  }

  // private (IMakeFeedback)
  function makeBody(){
    $this->body = $this->texts[ "bodyheader" ]."\n\n";
    foreach( $this->fields as $name => $field ){
      $this->body .= $field[descr].': ';
      $this->body .= $field[value];
      $this->body .= "\n";
    }
  }

  // private (IMakeFeedback)
  function sendEMail(){
    $this->objSender->setBody( $this->body );
    $this->objSender->setSubject( 'Feedback' );
    $this->objSender->send();
  }

  // private (IMakeFeedback)
  function redirect(){
    $url = $this->scriptViewer;
    $url .= '?resultOk=1';
    header( 'Location: '.$url."\n\n" );
  }

} // end class Feedback

//=============================================================

class Request{
  function getParam( $name ){
    global $HTTP_GET_VARS, $HTTP_POST_VARS;
    if ( isset( $HTTP_GET_VARS[ $name ] ) ){
      return $HTTP_GET_VARS[ $name ];
    }
    else if ( isset( $HTTP_POST_VARS[ $name ] ) ){
      return $HTTP_POST_VARS[ $name ];
    }
    return '';
  }
}

//=============================================================

class EMailSender{

  var $body;
  var $email;
  var $mode;

  function EMailSender(){
    $this->body = '';
    $this->email = '';
    $this->mode = 'real';
    $this->headers = '';
    $this->subject = '';
  }

  function setMode( $mode ){
    $this->mode = $mode;
  }

  function setEMail( $email ){
    $this->email = $email;
  }

  function setSubject( $subject ){
    $this->subject = $subject;
  }

  function setHeaders( $headers ){
    $this->headers = $headers;
  }

  function setBody( $body ){
    $this->body = $body;
  }

  function send(){
    if ( $this->email == '' ){
      echo 'Error. Cant send email - email address empty. Set email address in Feedback constructor.';
      exit;
    }
    if ( $this->mode == 'test' ){
      $str = '';
      $str .= "Sender send:\n";
      $str .= "to: {$this->email}\n";
      $str .= "subject: {$this->subject}\n";
      $str .= "body: {$this->body}\n";

      $fp = fopen( 'sender.log', 'w' );
      fputs( $fp, $str );
      fclose( $fp );
    }
    else{ // real send to email
      mail( $this->email, $this->subject, $this->body, $this->headers );
    }
  }
} // end class EMailSender

?>