<?
begin_block("Poll");
require_once("backend/functions.php"); 
dbconn(false); 

if (!function_exists("srt")) {
	function srt($a,$b){
		if ($a[0] > $b[0]) return -1;
		if ($a[0] < $b[0]) return 1;
		return 0;
	}
}

if ($_SERVER["REQUEST_METHOD"] == "POST" && $CURUSER && $_POST["act"] == "takepoll"){
	$choice = $_POST["choice"];
	if ($choice != "" && $choice < 256 && $choice == floor($choice)){
		$res = mysql_query("SELECT * FROM polls ORDER BY added DESC LIMIT 1") or die(mysql_error());
		$arr = mysql_fetch_assoc($res) or show_error_msg("Error", "No Poll",1);

		$pollid = $arr["id"];
		$userid = $CURUSER["id"];

		$res = mysql_query("SELECT * FROM pollanswers WHERE pollid=$pollid && userid=$userid") or die(mysql_error());
		$arr = mysql_fetch_assoc($res);

		if ($arr){
			show_error_msg("Error", "You have already voted!", 0);
		}else{

			mysql_query("INSERT INTO pollanswers VALUES(0, $pollid, $userid, $choice)") or die(mysql_error());
			if (mysql_affected_rows() != 1)
					show_error_msg("Error", "An error occured. Your vote has not been counted.", 0);
		}
	}else{
		show_error_msg("Error", "Please select an option.", 0);
	}
}

// Get current poll
if ($CURUSER){
	$res = mysql_query("SELECT * FROM polls ORDER BY added DESC LIMIT 1") or die(mysql_error());

	if($pollok=(mysql_num_rows($res))) {
		$arr = mysql_fetch_assoc($res);
		$pollid = $arr["id"];
		$userid = $CURUSER["id"];
		$question = $arr["question"];

		$o = array($arr["option0"], $arr["option1"], $arr["option2"], $arr["option3"], $arr["option4"],
    	$arr["option5"], $arr["option6"], $arr["option7"], $arr["option8"], $arr["option9"],
    	$arr["option10"], $arr["option11"], $arr["option12"], $arr["option13"], $arr["option14"],
    	$arr["option15"], $arr["option16"], $arr["option17"], $arr["option18"], $arr["option19"]);

		// Check if user has already voted
  		$res = mysql_query("SELECT * FROM pollanswers WHERE pollid=$pollid AND userid=$userid") or die(mysql_error());
  		$arr2 = mysql_fetch_assoc($res);
	}

	//Display Current Poll
	if($pollok) {
		print("<div align=center><b>$question</b></div>\n");
  		$voted = $arr2;

		// If member has voted already show results
  		if ($voted) {
    		if ($arr["selection"])
      			$uservote = $arr["selection"];
    		else
      			$uservote = -1;

			// we reserve 255 for blank vote.
    		$res = mysql_query("SELECT selection FROM pollanswers WHERE pollid=$pollid AND selection < 20") or die(mysql_error());

    		$tvotes = mysql_num_rows($res);

    		$vs = array(); // array of
    		$os = array();

    		// Count votes
    		while ($arr2 = mysql_fetch_row($res))
      		$vs[$arr2[0]] += 1;

    		reset($o);
    		for ($i = 0; $i < count($o); ++$i)
      		if ($o[$i])
        		$os[$i] = array($vs[$i], $o[$i]);

    		// now os is an array like this: array(array(123, "Option 1"), array(45, "Option 2"))
    		if ($arr["sort"] == "yes")
    			usort($os, srt);

    		print("<table width=100% border=0 cellspacing=0 cellpadding=0>\n");
    		$i = 0;

    		while ($a = $os[$i]){
      			if ($i == $uservote)
        			$a[1] .= "&nbsp;*";
      			if ($tvotes == 0)
      				$p = 0;
      			else
      				$p = round($a[0] / $tvotes * 100);
      			print("<tr><td align=center width=100% class=pollsanswer>" . format_comment($a[1]) . "</td></tr><tr><td align=left width=100% class=pollspercent>".get_poolsleft($i)."".get_poolsmiddle($i)." height=12 width=" . ($p) . ">".get_poolsright($i)."&nbsp;$p%</td></tr><tr><td><br></td></tr>\n");
      			++$i;
    		}

		print("</table>\n");
		$tvotes = number_format($tvotes);
    	print("<div align=center>Votes: $tvotes</div>\n");

  	}else{//User has not voted, show options

    	print("<form method=post action='?$_SERVER[QUERY_STRING]'>\n");
	print("<input type=hidden name=act value='takepoll'>");
    	$i = 0;

    	while ($a = $o[$i]){
      		print("<input type=radio name=choice value=$i>".format_comment($a)."<br>\n");
      		++$i;
    	}

    	print("<br>");
    	print("<input type=radio name=choice value=255>Blank Vote (View Results)<br>\n");
    	print("<p align=center><input type=submit value='Vote!'></p></form>");
  	}

	} else {
  		echo"<BR><BR><CENTER>No Active Polls</CENTER><BR><BR>\n";
	}
} else {
	echo"<BR><BR><CENTER>You must be logged in to view polls</CENTER><BR><BR>\n";
}

end_block();
?>