<?php
/**
 * @package WPQuiz
 * @version 0.1
 */
/*
Plugin Name: WPQuiz
Plugin URI: http://bauc.net/blog/wpquiz
Description: Add a quiz/question to a post/page
Author: Bauc
Version: 0.1
Author URI: http://bauc.net
*/


register_activation_hook(__FILE__,'wpquiz_install');

add_action( 'add_meta_boxes', 'wpquiz_add_meta_insert_quiz' );


function wpquiz_add_meta_insert_quiz()
{
    add_meta_box( 
        'wpquiz_insert_quiz',
        __( 'WPQuiz: Insert quiz:', 'wpquiz_text' ),
        'wpquiz_insert_quiz',
        'post' 
    );
    add_meta_box(
        'wpquiz_insert_quiz',
        __( 'WPQuiz: Insert Quiz', 'wpquiz_text' ), 
        'wpquiz_insert_quiz',
        'page'
    );
}

add_action('init', 'wpquiz_add_js');
add_shortcode( 'wpquiz', 'wpquiz_tag' );

function wpquiz_insert_quiz() {

  wp_nonce_field( plugin_basename( __FILE__ ), 'wpquiz_noncename' );
  
  echo '<label for="wpquiz_add_quiz">';
       _e("Insert quiz:", 'wpquiz_text' );
  echo '</label> ';
  
  global $wpdb; 
  $table_name1 = $wpdb->prefix . "wpquiz_questions";
  $table_name1 = $wpdb->prefix . "wpquiz_quiz";
    
  $sql = "SELECT id, quiztitle FROM " . $table_name1. ";";
  
  $myrows = $wpdb->get_results( $sql );

  echo '<form name = "wpquiz_adder">';
  echo '<select name = "wpquiza" id = "wpquiza">';
  
  foreach ($myrows as $myrow)
  {	
	echo '<option value="' . $myrow->id  .  '">' . $myrow->quiztitle  .  '</option>';		
  	
  }
  
  echo '</select>';
  echo '<input type = "button" id = "wpquiz_select" name = "wpquiz_select" onclick = "addQuiz(this.id) ;" value = "Add to post">';
  echo '</form>';
}


function wpquiz_addstyle()
{

	$myStyleUrl = WP_PLUGIN_URL . '/wpquiz/wpquiz_m1.css';
	$myStyleFile = WP_PLUGIN_DIR . '/wpquiz/wpquiz_m1.css';
	if ( file_exists($myStyleFile) ) {	
		wp_register_style('wpquiz_m1', $myStyleUrl);
		wp_enqueue_style( 'wpquiz_m1');
	}


}

add_action( 'wp_print_styles', 'wpquiz_addstyle' );

function wpquiz_tag( $atts ) {
	
	global $wpdb;
	$table_name1 = $wpdb->prefix . "wpquiz_questions";
	$table_name2 = $wpdb->prefix . "wpquiz_quiz";

	
	extract( shortcode_atts( array(
		'id' => '1',
	), $atts ) );
	
	$quizno = $id;
		
	$sql2 = "SELECT quiztitle FROM " . $table_name2. " WHERE id = $id";		
	$sql = "SELECT id, question, answers, correctAnswer FROM " . $table_name1. " WHERE quizid = $id ORDER BY id ASC";		
	$quizdb = $wpdb->get_row($sql2);	
	$myrowss = $wpdb->get_results( $sql );

	
	if ($_POST['charlie'] == "x1")
	{
			$c = 0;		

		foreach ($myrowss as $myrows)
		{
			
			$qcount++;
			$id = $myrows->id;
			$question = stripslashes($myrows->question);
			$answers = stripslashes($myrows->answers);
			$correct = $myrows->correctAnswer;
			
			$ans = explode("\n", $answers);
			
			$tt = '<ul>';
			
			$answerQ = htmlspecialchars($_POST['quizq' . $id]);
			$debug2 = $debug2 . "<h2>ans: $answerQ</h2>";
			
			$answerdb = array();
			
			$i = 0;

			$answerdbc[$i] = false;
			if ($answerQ == "") {$answerdbc[$id] = true; $c++;}
			
			foreach ($ans as $v)
			{
				$i++;
				
				$yip = "";				
				
				if ($i == $correct)
				{				
					$tt = $tt . '<li class = "wpquizlicorrect">' . $v . '' . $yip . '</li>';
				}
				elseif ($i == $answerQ)
				{
					$tt = $tt . '<li class = "wpquizliwrong">' . $v . '' . $yip . '</li>';
				}
				else
				{
					$tt = $tt . '<li class = "wpquizli">' . $v . '' . $yip . '</li>';
				}
			}
								
			$quiz = $quiz . '<p>' . $question . '</p>' . $tt . '</ul>';
						
			if ($c > 0) {
				$answerdbc[-1] = $qcount;			
				$quiz = wpquiz_loadquestion($quizno, $answerdbc);
			}
						
		}
		return $quiz;
	}
	
	else {

		$quiz = wpquiz_loadquestion($quizno);
		return $quiz;
				
	}
	
}

function wpquiz_loadquestion($quizno, $answerdbc = "")
{
		
	global $wpdb;
	$table_name1 = $wpdb->prefix . "wpquiz_questions";
	$table_name2 = $wpdb->prefix . "wpquiz_quiz";

	$id = $quizno;		
	$sql2 = "SELECT quiztitle FROM " . $table_name2. " WHERE id = $id";		
	$sql = "SELECT id, question, answers, correctAnswer FROM " . $table_name1. " WHERE quizid = $id ORDER BY id";		
	$quizdb = $wpdb->get_row($sql2);
	
	$myrowss = $wpdb->get_results( $sql );
		
		$t1 = '<p>' . $quizdb->quiztitle .'</p>';
		$t1 = $t1 . '<form name="wpquiz_form" method="post" action="' . str_replace( '%7E', '~', $_SERVER['REQUEST_URI']) . '">';		
		$quiz = $t1;
		
		$numcc= 0;
		
		foreach ($myrowss as $myrows)
		{
				
			$id = $myrows->id;
			$numcc++;
			$question = stripslashes($myrows->question);
			$answers = stripslashes($myrows->answers);
			$correct = $myrows->correctAnswer;
			
			$ans = explode("\n", $answers);
			
			$tt = '<p>';
			
			if ($answerdbc[$id] === true) { $tt = $tt ."<em>Error:</em> - Please select an answer<br />";}
					
			$na = 0;
			$checked = "";
			$cid = 'quizq' . $id;
			if ($_POST[$cid] > 0) {$checked = $_POST[$cid];}
			
			foreach ($ans as $v)
			{				
				$na++;
				
				if ($na == $checked)
				{
					$tt = $tt . '' .  '<input type = "radio" name = "quizq' . $id .'" id = "quiz' . $id . '.' . $na .'" onchange="checkQuiz(this.id)" value = "' . $na .'" checked = "yes"> ' . '<label for ="quiz' . $id . '.' .  $na .'">' . $v . '</label><br />' . "\n";
				}
				else
				{
					$tt = $tt . '' .  '<input type = "radio" name = "quizq' . $id .'" id = "quiz' . $id . '.' . $na .'" onchange="checkQuiz(this.id)" value = "' . $na .'"> ' . '<label for ="quiz' . $id . '.' .  $na .'">' . $v . '</label><br />' . "\n";
				}
		
			}
			
					
			$quiz = $quiz . '<p>' . $question . '</p>' . $tt . '</p>';
		}
		
		$debug = "";
		
		return $quiz . '<input type = "hidden" name = "charlie" value = "x1">' . 	'<input type = "hidden" name = "foxtrot" value = "'. $numcc .'">' .
		'<input type = "submit" name = "Submit" value = "Answer Quiz"></form>';

}

add_shortcode( 'wpquiztext', 'wpquiz_text' );

function wpquiz_add_js ()
{
	
    wp_register_script( 'wpquiz_checkquiz', plugins_url( 'wpquiz/wpquiz_checkquiz.js' , dirname(__FILE__) ));
    wp_enqueue_script( 'wpquiz_checkquiz' );

}

function wpquiz_text ($att, $content)
{

	if ($_POST['charlie'] == "x1") {
		$intt = $_POST['foxtrot'];
		$citt=0;
		$missing_value = false;
		$tt ="";
		foreach($_POST as $name => $value) { 
			$pos = strrpos($name, "quizq");
			$tt = $tt . "<p>$name : $value - $citt - $intt</p>";
			if ($pos === false) { // note: three equal signs
			}else
			{
				$citt++;
				
			}			
		}
	
	if ($citt == $intt) { return $content;}
		
	}

}


///////////////////////////////////////////////
///INSTALL
///////////////////////////////////////////////


global $wpquiz_db_version;
$wpquiz_db_version = "1.0";

function wpquiz_install() {

   include('wpquiz_install.php');
   
}

//////////////////////////////////////////////

//admin page

add_action('admin_menu', 'wpquiz_admin_screen');
add_action( 'admin_menu', 'wpquiz_admin_enqueue_js' ); 

function wpquiz_admin_enqueue_js()
{ 
    wp_enqueue_script( 'wpquiz_admin_js', plugins_url( 'wpquiz/wpquiz_admin.js' , dirname(__FILE__) ) ); 
} 


function wpquiz_admin_screen()
{
	add_options_page('WPQuiz', 'WPQuiz', 'manage_options', 'wpquiz_options', 'wpquiz_admin_options');
}

function wpquiz_admin_options()
 {
	include('wpquiz_admin_options.php');
}

// Add the settings link
function wpquiz_settings_link($links, $file) 
{
	if ($file == plugin_basename(__FILE__)){
		$settings_link = '<a href="options-general.php?page=wpquiz_options">'.(__("Settings", "WPQuiz")).'</a>';
		array_unshift($links, $settings_link);
	}
	return $links;
}
add_filter('plugin_action_links', 'wpquiz_settings_link', 10, 2 );

////////////////////////////////////////////

?>