qemudb/include/vote.php

<?php
require_once(BASE."include/util.php");
/* max votes per user */
define('MAX_VOTES',3);

/**
 * count the number of votes for appId by userId
 */
function vote_count($iVersionId, $iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        else
            return 0;
    }
    $hResult = query_parameters("SELECT * FROM appVotes WHERE versionId = '?' AND userId = '?'",
                            $iVersionId, $iUserId);
    return query_num_rows($hResult);
}


/**
 * total votes by userId
 */
function vote_count_user_total($iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        else
            return 0;
    }
    $hResult = query_parameters("SELECT * FROM appVotes WHERE userId = '?'", $iUserId);
    return query_num_rows($hResult);
}


/*
 * total votes for versionId
 */
function vote_count_version_total($iVersionId)
{
    $hResult = query_parameters("SELECT * FROM appVotes WHERE versionId = '?'",
                                    $iVersionId);
    return query_num_rows($hResult);
}


/**
 * add a vote for appId
 */
function vote_add($iVersionId, $iSlot, $iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        else
            return;
    }

    if($iSlot > MAX_VOTES)
        return;
    
    vote_remove($iSlot, $iUserId);

    query_parameters("INSERT INTO appVotes (id, time, versionId, userId, slot)
                      VALUES (?, ?, '?', '?', '?')", "null", "NOW()",
                          $iVersionId, $iUserId, $iSlot);
}


/**
 * remove vote for a slot
 */
function vote_remove($iSlot, $iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        else
            return;
    }

    $sQuery = "DELETE FROM appVotes WHERE userId = '?' AND slot = '?'";
    query_parameters($sQuery, $iUserId, $iSlot);
}


function vote_get_user_votes($iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        if(!$iUserId)
            return array();
    }
    $hResult = query_parameters("SELECT * FROM appVotes WHERE userId = '?'", $iUserId);
    if(!$hResult)
        return array();

    $obs = array();
    while($oRow = query_fetch_object($hResult))
        $obs[$oRow->slot] = $oRow;
    return $obs;
}


function vote_menu()
{
    global $aClean;

    $m = new htmlmenu("Votes","updatevote.php");

    $oVersion = new version($aClean['iVersionId']);

    if($oVersion->iObsoleteBy)
    {
        $m->add("This version is marked as obsolete, so you cannot vote for it.");
    } else
    {
        $votes = vote_get_user_votes();

        for($i = 1;$i <= MAX_VOTES; $i++)
        {
            if(isset($votes[$i]))
                $str = Version::fullNameLink($votes[$i]->versionId);
            else
                $str = "No App Selected";

            $m->add("<input type=radio name=iSlot value='$i'> $str");
        }

        $m->addmisc("&nbsp;");

        $m->add("<input type=submit name=sClear value=' Clear Vote   ' class=votebutton>");
        $m->add("<input type=submit name=sVote value='Vote for App' class=votebutton>");

        $m->addmisc("<input type=hidden name=iVersionId value={$aClean['iVersionId']}>");

        $m->add("View Results", BASE."votestats.php");
        $m->add("Voting Help", BASE."help/?sTopic=voting");
    }

    $m->done(1);
}


function vote_update($vars)
{
    if(!$_SESSION['current']->isLoggedIn())
        util_show_error_page_and_exit("You must be logged in to vote");

    $oVersion = new version($vars['iVersionId']);

    if( !is_numeric($vars['iVersionId']) OR !is_numeric($vars['iSlot']))
    {
        if(is_numeric($vars['iVersionId']))
        {
            addmsg("You need to select a voting slot", "red");
            util_redirect_and_exit($oVersion->objectMakeUrl());
        } else
        {
            util_redirect_and_exit(apidb_fullurl("index.php"));
        }

        return;
    }

    if($vars["sVote"])
    {
        addmsg("Registered vote for App #".$vars['iVersionId'], "green");
        vote_add($vars['iVersionId'], $vars['iSlot']);
    } else if($vars['sClear'])
    {
        /* see if we have a vote in this slot, if we don't there is */
        /* little reason to remove it or even mention that we did anything */
        if(is_vote_in_slot($vars['iSlot']))
        {
            vote_remove($vars['iSlot']);
            addmsg("Removed vote for App #".$vars['iVersionId'], "green");
        }
    }

    util_redirect_and_exit($oVersion->objectMakeUrl());
}

// tell us if there is a vote in a given slot so we don't
// display incorrect information to the user or go
// through the trouble of trying to remove a vote that doesn't exist
function is_vote_in_slot($iSlot, $iUserId = null)
{
    if(!$iUserId)
    {
        if($_SESSION['current']->isLoggedIn())
            $iUserId = $_SESSION['current']->iUserId;
        else
            return;
    }

    $sQuery = "SELECT COUNT(*) as count from appVotes WHERE userId = '?' AND slot = '?'";
    if($hResult = query_parameters($sQuery, $iUserId, $iSlot))
    {
        $oRow = query_fetch_object($hResult);        
        if($oRow->count != 0)
            return true;
        else
            return false;
    }
    
    return false;
}

?>