588 lines
19 KiB
PHP
588 lines
19 KiB
PHP
<?php
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/******************************************************************************
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* Poll.php *
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*******************************************************************************
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* SMF: Simple Machines Forum *
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* Open-Source Project Inspired by Zef Hemel (zef@zefhemel.com) *
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* =========================================================================== *
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* Software Version: SMF 1.0.7 *
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* Software by: Simple Machines (http://www.simplemachines.org) *
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* Copyright 2001-2005 by: Lewis Media (http://www.lewismedia.com) *
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* Support, News, Updates at: http://www.simplemachines.org *
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*******************************************************************************
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* This program is free software; you may redistribute it and/or modify it *
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* under the terms of the provided license as published by Lewis Media. *
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* *
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* This program is distributed in the hope that it is and will be useful, *
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* but WITHOUT ANY WARRANTIES; without even any implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* See the "license.txt" file for details of the Simple Machines license. *
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* The latest version can always be found at http://www.simplemachines.org. *
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******************************************************************************/
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if (!defined('SMF'))
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die('Hacking attempt...');
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/* This file contains the functions for voting, locking, removing and editing
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polls. Note that that posting polls is done in Post.php.
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void Vote()
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- is called to register a vote in a poll.
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- must be called with a topic and option specified.
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- uses the Post language file.
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- requires the poll_vote permission.
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- upon successful completion of action will direct user back to topic.
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- is accessed via ?action=vote.
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void LockVoting()
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- is called to lock or unlock voting on a poll.
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- must be called with a topic specified in the URL.
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- an admin always has over riding permission to lock a poll.
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- if not an admin must have poll_lock_any permission.
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- otherwise must be poll starter with poll_lock_own permission.
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- upon successful completion of action will direct user back to topic.
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- is accessed via ?action=lockVoting.
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void EditPoll()
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- is called to display screen for editing a poll.
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- must be called with a topic specified in the URL.
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- uses the Post language file.
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- uses the Poll template (main sub template.).
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- user must have poll_edit_any permission.
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- otherwise must be poll starter with poll_edit_own permission.
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- is accessed via ?action=editpoll.
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void EditPoll2()
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- is called to update the settings for a poll.
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- must be called with a topic specified in the URL.
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- user must have poll_edit_any permission.
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- otherwise must be poll starter with poll_edit_own permission.
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- upon successful completion of action will direct user back to topic.
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- is accessed via ?action=editpoll2.
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void RemovePoll()
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- is called to remove a poll from a topic.
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- must be called with a topic specified in the URL.
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- user must have poll_remove_any permission.
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- otherwise must be poll starter with poll_remove_own permission.
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- upon successful completion of action will direct user back to topic.
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- is accessed via ?action=removepoll.
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*/
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// Allow the user to vote.
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function Vote()
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{
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global $topic, $txt, $db_prefix, $ID_MEMBER, $user_info;
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// Make sure you can vote.
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isAllowedTo('poll_vote');
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// Even with poll_vote permission we would never be able to register you.
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if ($user_info['is_guest'])
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fatal_lang_error('cannot_poll_vote');
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loadLanguage('Post');
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// Check if they have already voted, or voting is locked.
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$request = db_query("
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SELECT IFNULL(lp.ID_CHOICE, -1) AS selected, p.votingLocked, p.ID_POLL, p.expireTime, p.maxVotes, p.changeVote
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FROM ({$db_prefix}polls AS p, {$db_prefix}topics AS t)
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LEFT JOIN {$db_prefix}log_polls AS lp ON (p.ID_POLL = lp.ID_POLL AND lp.ID_MEMBER = $ID_MEMBER)
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WHERE p.ID_POLL = t.ID_POLL
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AND t.ID_TOPIC = $topic
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LIMIT 1", __FILE__, __LINE__);
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if (mysql_num_rows($request) == 0)
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fatal_lang_error('smf27', false);
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$row = mysql_fetch_assoc($request);
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mysql_free_result($request);
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// Is voting locked or has it expired?
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if (!empty($row['votingLocked']) || (!empty($row['expireTime']) && time() > $row['expireTime']))
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fatal_lang_error('smf27', false);
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// If they have already voted and aren't allowed to change their vote - hence they are outta here!
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if ($row['selected'] != -1 && empty($row['changeVote']))
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fatal_lang_error('smf27', false);
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// Otherwise if they can change their vote yet they haven't sent any options... remove their vote and redirect.
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elseif (!empty($row['changeVote']))
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{
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$pollOptions = array();
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// Find out what they voted for before.
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$request = db_query("
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SELECT ID_CHOICE
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FROM {$db_prefix}log_polls
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WHERE ID_MEMBER = $ID_MEMBER
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AND ID_POLL = $row[ID_POLL]", __FILE__, __LINE__);
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while ($choice = mysql_fetch_row($request))
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$pollOptions[] = $choice[0];
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mysql_free_result($request);
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// Just skip it if they had voted for nothing before.
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if (!empty($pollOptions))
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{
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// Update the poll totals.
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db_query("
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UPDATE {$db_prefix}poll_choices
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SET votes = votes - 1
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WHERE ID_POLL = $row[ID_POLL]
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AND ID_CHOICE IN (" . implode(', ', $pollOptions) . ")
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AND votes > 0
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LIMIT " . count($pollOptions), __FILE__, __LINE__);
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// Delete off the log.
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db_query("
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DELETE FROM {$db_prefix}log_polls
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WHERE ID_MEMBER = $ID_MEMBER
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AND ID_POLL = $row[ID_POLL]", __FILE__, __LINE__);
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}
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// Redirect back to the topic so the user can vote again!
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if (empty($_POST['options']))
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redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
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}
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// Make sure the option(s) are valid.
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if (empty($_POST['options']))
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fatal_lang_error('smf26', false);
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// Too many options checked!
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if (count($_REQUEST['options']) > $row['maxVotes'])
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fatal_error(sprintf($txt['poll_error1'], $row['maxVotes']), false);
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$pollOptions = array();
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$setString = '';
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foreach ($_REQUEST['options'] as $id)
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{
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$id = (int) $id;
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$pollOptions[] = $id;
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$setString .= "
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($row[ID_POLL], $ID_MEMBER, $id),";
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}
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$setString = substr($setString, 0, -1);
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// Add their vote to the tally.
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db_query("
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INSERT INTO {$db_prefix}log_polls
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(ID_POLL, ID_MEMBER, ID_CHOICE)
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VALUES $setString", __FILE__, __LINE__);
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db_query("
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UPDATE {$db_prefix}poll_choices
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SET votes = votes + 1
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WHERE ID_POLL = $row[ID_POLL]
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AND ID_CHOICE IN (" . implode(', ', $pollOptions) . ")
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LIMIT " . count($pollOptions), __FILE__, __LINE__);
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// Return to the post...
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redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
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}
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// Lock the voting for a poll.
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function LockVoting()
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{
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global $topic, $ID_MEMBER, $db_prefix, $user_info;
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checkSession('get');
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// Get the poll starter, ID, and whether or not it is locked.
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$request = db_query("
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SELECT t.ID_MEMBER_STARTED, t.ID_POLL, p.votingLocked
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FROM {$db_prefix}topics AS t, {$db_prefix}polls AS p
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WHERE t.ID_TOPIC = $topic
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AND p.ID_POLL = t.ID_POLL
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LIMIT 1", __FILE__, __LINE__);
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list ($memberID, $pollID, $votingLocked) = mysql_fetch_row($request);
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// If the user _can_ modify the poll....
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if (!allowedTo('poll_lock_any'))
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isAllowedTo('poll_lock_' . ($ID_MEMBER == $memberID ? 'own' :'any'));
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// It's been locked by a non-moderator.
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if ($votingLocked == '1')
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$votingLocked = '0';
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// Locked by a moderator, and this is a moderator.
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elseif ($votingLocked == '2' && allowedTo('moderate_board'))
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$votingLocked = '0';
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// Sorry, a moderator locked it.
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elseif ($votingLocked == '2' && !allowedTo('moderate_board'))
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fatal_lang_error('smf31');
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// A moderator *is* locking it.
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elseif ($votingLocked == '0' && allowedTo('moderate_board'))
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$votingLocked = '2';
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// Well, it's gonna be locked one way or another otherwise...
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else
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$votingLocked = '1';
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// Lock! *Poof* - no one can vote.
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db_query("
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UPDATE {$db_prefix}polls
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SET votingLocked = $votingLocked
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WHERE ID_POLL = $pollID
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LIMIT 1", __FILE__, __LINE__);
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redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
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}
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// Ask what to change in a poll.
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function EditPoll()
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{
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global $txt, $ID_MEMBER, $db_prefix;
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global $user_info, $context, $topic;
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if (empty($topic))
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fatal_lang_error(1, false);
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loadLanguage('Post');
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loadTemplate('Poll');
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$context['can_moderate_poll'] = allowedTo('moderate_board');
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$context['start'] = $_REQUEST['start'];
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// Get the question, id, and starter.
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$request = db_query("
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SELECT t.ID_MEMBER_STARTED, t.ID_POLL, p.question, p.hideResults, p.expireTime, p.maxVotes, p.changeVote
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FROM {$db_prefix}topics AS t, {$db_prefix}polls AS p
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WHERE t.ID_TOPIC = $topic
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AND p.ID_POLL = t.ID_POLL
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LIMIT 1", __FILE__, __LINE__);
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if (mysql_num_rows($request) == 0)
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fatal_lang_error('smf232');
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$pollinfo = mysql_fetch_assoc($request);
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mysql_free_result($request);
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// Can you do this?
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if (!allowedTo('poll_edit_any'))
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isAllowedTo('poll_edit_' . ($ID_MEMBER == $pollinfo['ID_MEMBER_STARTED'] ? 'own' :'any'));
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// Want to make sure before you actually submit? Must be a lot of options, or something.
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if (isset($_POST['preview']))
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{
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$question = htmlspecialchars(stripslashes($_POST['question']));
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$question = preg_replace('~&#(\d{4,5}|[3-9]\d{2,4}|2[6-9]\d);~', '&#$1;', $question);
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// Basic theme info...
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$context['poll'] = array(
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'id' => $pollinfo['ID_POLL'],
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'question' => $question,
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'hide_results' => $pollinfo['hideResults'],
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'max_votes' => $pollinfo['maxVotes']
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);
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// Start at number one with no last id to speak of.
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$number = 1;
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$last_id = 0;
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// Get all the choices.
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$request = db_query("
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SELECT label, votes, ID_CHOICE
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FROM {$db_prefix}poll_choices
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WHERE ID_POLL = $pollinfo[ID_POLL]", __FILE__, __LINE__);
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$context['choices'] = array();
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while ($row = mysql_fetch_assoc($request))
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{
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// Get the highest id so we can add more without reusing.
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if ($row['ID_CHOICE'] >= $last_id)
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$last_id = $row['ID_CHOICE'] + 1;
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// They cleared this by either omitting it or emptying it.
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if (!isset($_POST['options'][$row['ID_CHOICE']]) || $_POST['options'][$row['ID_CHOICE']] == '')
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continue;
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// Add the choice!
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$context['choices'][$row['ID_CHOICE']] = array(
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'id' => $row['ID_CHOICE'],
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'number' => $number++,
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'votes' => $row['votes'],
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'label' => $row['label'],
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'is_last' => false
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);
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}
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mysql_free_result($request);
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// If an option exists, update it. If it is new, add it - but don't reuse ids!
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foreach ($_POST['options'] as $id => $label)
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{
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$label = stripslashes(preg_replace('~&#(\d{4,5}|[3-9]\d{2,4}|2[6-9]\d);~', '&#$1;', $label));
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if (isset($context['choices'][$id]))
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$context['choices'][$id]['label'] = $label;
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elseif ($label != '')
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$context['choices'][] = array(
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'id' => $last_id++,
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'number' => $number++,
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'label' => $label,
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'votes' => -1,
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'is_last' => false
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);
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}
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if (allowedTo('moderate_board'))
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$context['poll']['expiration'] = $_POST['poll_expire'];
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// Check the question/option count for errors.
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if (trim($_POST['question']) == '')
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$context['poll_errors']['no_question'] = true;
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// No check is needed, since nothing is really posted.
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checkSubmitOnce('free');
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}
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else
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{
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// Basic theme info...
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$context['poll'] = array(
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'id' => $pollinfo['ID_POLL'],
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'question' => $pollinfo['question'],
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'hide_results' => $pollinfo['hideResults'],
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'max_votes' => $pollinfo['maxVotes'],
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'change_vote' => !empty($pollinfo['changeVote']),
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);
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if (allowedTo('moderate_board'))
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$context['poll']['expiration'] = empty($pollinfo['expireTime']) ? '' : ceil($pollinfo['expireTime'] <= time() ? -1 : ($pollinfo['expireTime'] - time()) / (3600 * 24));
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// Get all the choices.
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$request = db_query("
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SELECT label, votes, ID_CHOICE
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FROM {$db_prefix}poll_choices
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WHERE ID_POLL = $pollinfo[ID_POLL]", __FILE__, __LINE__);
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$context['choices'] = array();
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$number = 1;
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while ($row = mysql_fetch_assoc($request))
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{
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$context['choices'][$row['ID_CHOICE']] = array(
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'id' => $row['ID_CHOICE'],
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'number' => $number++,
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'votes' => $row['votes'],
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'label' => $row['label'],
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'is_last' => false
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);
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}
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mysql_free_result($request);
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$last_id = max(array_keys($context['choices'])) + 1;
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}
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$context['page_title'] = $txt['smf39'];
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$context['choices'][] = array(
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'id' => $last_id,
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'number' => $number,
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'votes' => -1,
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'label' => '',
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'is_last' => true
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);
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// Build the link tree.
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$context['linktree'][] = array(
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'name' => $txt['smf39']
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);
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// Register this form in the session variables.
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checkSubmitOnce('register');
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}
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// Change a poll...
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function EditPoll2()
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{
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global $txt, $topic, $board, $ID_MEMBER, $db_prefix;
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global $modSettings, $user_info;
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checkSession();
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if (isset($_POST['preview']))
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return EditPoll();
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// HACKERS (!!) can't edit :P.
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if (empty($topic))
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fatal_lang_error(1, false);
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// Get the starter and the poll's ID.
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$request = db_query("
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SELECT ID_MEMBER_STARTED, ID_POLL
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FROM {$db_prefix}topics
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WHERE ID_TOPIC = $topic
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LIMIT 1", __FILE__, __LINE__);
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if (mysql_num_rows($request) == 0)
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fatal_lang_error('smf232');
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$bcinfo = mysql_fetch_assoc($request);
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mysql_free_result($request);
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// Check if they have the power to edit the poll.
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if (!allowedTo('poll_edit_any'))
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isAllowedTo('poll_edit_' . ($ID_MEMBER == $bcinfo['ID_MEMBER_STARTED'] ? 'own' :'any'));
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// Get all the choices. (no better way to remove all emptied and add previously non-existent ones.)
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$request = db_query("
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SELECT ID_CHOICE
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FROM {$db_prefix}poll_choices
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WHERE ID_POLL = $bcinfo[ID_POLL]", __FILE__, __LINE__);
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$choices = array();
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while ($row = mysql_fetch_assoc($request))
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$choices[] = $row['ID_CHOICE'];
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mysql_free_result($request);
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$optionCount = 0;
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// Ensure the user isn't removing all the options - there must be at least two.
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foreach ($_POST['options'] as $k => $option)
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{
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if (trim($option) != '')
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$optionCount++;
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}
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if ($optionCount < 2)
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fatal_lang_error('poll_few', false);
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// Also - ensure they are not removing the question.
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if (trim($_POST['question']) == '')
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{
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$_POST['preview'] = 1;
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return EditPoll();
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}
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// Prevent double submission of this form.
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checkSubmitOnce('check');
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foreach ($_POST['options'] as $k => $option)
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{
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// Make sure the key is numeric for sanity's sake.
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$k = (int) $k;
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$option = preg_replace('~&#(\d{4,5}|[3-9]\d{2,4}|2[6-9]\d);~', '&#$1;', $option);
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// They've cleared the box. Either they want it deleted, or it never existed.
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if (trim($option) == '')
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{
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// They want it deleted. Bye.
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if (in_array($k, $choices))
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{
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db_query("
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DELETE FROM {$db_prefix}log_polls
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WHERE ID_POLL = $bcinfo[ID_POLL]
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AND ID_CHOICE = $k", __FILE__, __LINE__);
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db_query("
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DELETE FROM {$db_prefix}poll_choices
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WHERE ID_POLL = $bcinfo[ID_POLL]
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AND ID_CHOICE = $k", __FILE__, __LINE__);
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}
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// Skip the rest...
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continue;
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}
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// Dress the option up for its big date with the database.
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$option = htmlspecialchars($option);
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// If it's already there, update it. If it's not... add it.
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if (in_array($k, $choices))
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db_query("
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UPDATE {$db_prefix}poll_choices
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SET label = '$option'
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WHERE ID_POLL = $bcinfo[ID_POLL]
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AND ID_CHOICE = $k
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LIMIT 1", __FILE__, __LINE__);
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else
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db_query("
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INSERT INTO {$db_prefix}poll_choices
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(ID_POLL, ID_CHOICE, label, votes)
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VALUES ($bcinfo[ID_POLL], $k, '$option', 0)", __FILE__, __LINE__);
|
|
}
|
|
|
|
// Shall I reset the vote count, sir?
|
|
if (isset($_POST['resetVoteCount']))
|
|
{
|
|
db_query("
|
|
UPDATE {$db_prefix}poll_choices
|
|
SET votes = 0
|
|
WHERE ID_POLL = $bcinfo[ID_POLL]", __FILE__, __LINE__);
|
|
db_query("
|
|
DELETE FROM {$db_prefix}log_polls
|
|
WHERE ID_POLL = $bcinfo[ID_POLL]", __FILE__, __LINE__);
|
|
}
|
|
|
|
// And finally... change the poll question, etc.
|
|
$_POST['question'] = htmlspecialchars($_POST['question']);
|
|
$_POST['question'] = preg_replace('~&#(\d{4,5}|[3-9]\d{2,4}|2[6-9]\d);~', '&#$1;', $_POST['question']);
|
|
|
|
$_POST['poll_hide'] = (int) $_POST['poll_hide'];
|
|
$_POST['poll_change_vote'] = isset($_POST['poll_change_vote']) ? 1 : 0;
|
|
|
|
// Ensure that the number options allowed makes sense, and the expiration date is valid.
|
|
if (allowedTo('moderate_board'))
|
|
{
|
|
if (empty($_POST['poll_expire']) && $_POST['poll_hide'] == 2)
|
|
$_POST['poll_hide'] = 1;
|
|
else
|
|
$_POST['poll_expire'] = empty($_POST['poll_expire']) ? '0' : time() + $_POST['poll_expire'] * 3600 * 24;
|
|
|
|
if (empty($_POST['poll_max_votes']) || $_POST['poll_max_votes'] <= 0)
|
|
$_POST['poll_max_votes'] = 1;
|
|
else
|
|
$_POST['poll_max_votes'] = (int) $_POST['poll_max_votes'];
|
|
}
|
|
|
|
db_query("
|
|
UPDATE {$db_prefix}polls
|
|
SET question = '$_POST[question]', changeVote = $_POST[poll_change_vote]," . (allowedTo('moderate_board') ? "
|
|
hideResults = $_POST[poll_hide], expireTime = $_POST[poll_expire], maxVotes = $_POST[poll_max_votes]" : "
|
|
hideResults = IF(expireTime = 0 AND $_POST[poll_hide] = 2, 1, $_POST[poll_hide])") . "
|
|
WHERE ID_POLL = $bcinfo[ID_POLL]
|
|
LIMIT 1", __FILE__, __LINE__);
|
|
|
|
// Off we go.
|
|
redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
|
|
}
|
|
|
|
// Remove a poll from a topic without removing the topic.
|
|
function RemovePoll()
|
|
{
|
|
global $topic, $db_prefix, $user_info, $ID_MEMBER;
|
|
|
|
// Make sure the topic is not empty.
|
|
if (empty($topic))
|
|
fatal_lang_error(1, false);
|
|
|
|
// Check permissions.
|
|
if (!allowedTo('poll_remove_any'))
|
|
{
|
|
$request = db_query("
|
|
SELECT ID_MEMBER_STARTED
|
|
FROM {$db_prefix}topics
|
|
WHERE ID_TOPIC = $topic
|
|
LIMIT 1", __FILE__, __LINE__);
|
|
list ($starter) = mysql_fetch_row($request);
|
|
mysql_free_result($request);
|
|
|
|
isAllowedTo('poll_remove_' . ($starter == $ID_MEMBER ? 'own' : 'any'));
|
|
}
|
|
|
|
// Retrieve the poll ID.
|
|
$request = db_query("
|
|
SELECT ID_POLL
|
|
FROM {$db_prefix}topics
|
|
WHERE ID_TOPIC = $topic
|
|
LIMIT 1", __FILE__, __LINE__);
|
|
list ($pollID) = mysql_fetch_row($request);
|
|
mysql_free_result($request);
|
|
|
|
// Remove all user logs for this poll.
|
|
db_query("
|
|
DELETE FROM {$db_prefix}log_polls
|
|
WHERE ID_POLL = $pollID", __FILE__, __LINE__);
|
|
// Remove all poll choices.
|
|
db_query("
|
|
DELETE FROM {$db_prefix}poll_choices
|
|
WHERE ID_POLL = $pollID", __FILE__, __LINE__);
|
|
// Remove the poll itself.
|
|
db_query("
|
|
DELETE FROM {$db_prefix}polls
|
|
WHERE ID_POLL = $pollID
|
|
LIMIT 1", __FILE__, __LINE__);
|
|
// Finally set the topic poll ID back to 0!
|
|
db_query("
|
|
UPDATE {$db_prefix}topics
|
|
SET ID_POLL = 0
|
|
WHERE ID_TOPIC = $topic
|
|
LIMIT 1", __FILE__, __LINE__);
|
|
|
|
// Take the moderator back to the topic.
|
|
redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
|
|
}
|
|
|
|
?>
|