Files
tyforum/script/poll_vote.pl
2015-01-03 11:43:36 +01:00

132 lines
4.1 KiB
Perl
Executable File

#!/usr/bin/perl
#------------------------------------------------------------------------------
# mwForum - Web-based discussion forum
# Copyright (c) 1999-2015 Markus Wichitill
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#------------------------------------------------------------------------------
use strict;
use warnings;
no warnings qw(uninitialized redefine);
# Imports
use MwfMain;
#------------------------------------------------------------------------------
# Init
my ($m, $cfg, $lng, $user, $userId) = MwfMain->new($_[0]);
# Check if access should be denied
$cfg->{polls} or $m->error('errNoAccess');
$userId or $m->error('errNoAccess');
# Get CGI parameters
my $optionId = $m->paramInt('option');
my $topicId = $m->paramInt('tid');
# Check request source authentication
$m->checkSourceAuth() or $m->error('errSrcAuth');
# Get topic
my ($boardId, $pollId, $locked) = $m->fetchArray("
SELECT boardId, pollId, locked FROM topics WHERE id = ?", $topicId);
$boardId or $m->error('errTpcNotFnd');
# Get board
my $board = $m->fetchHash("
SELECT * FROM boards WHERE id = ?", $boardId);
$board or $m->error('errBrdNotFnd');
# Check if user can see and write to board
my $boardAdmin = $user->{admin} || $m->boardAdmin($userId, $board->{id});
$boardAdmin || $m->boardVisible($board) or $m->error('errNoAccess');
$boardAdmin || $m->boardWritable($board, 1) or $m->error('errNoAccess');
# Get poll
my $poll = $m->fetchHash("
SELECT locked, multi FROM polls WHERE id = ?", $pollId);
$poll or $m->error('errPolNotFnd');
# Check if topic or poll is locked
!$locked or $m->error('errTpcLocked');
!$poll->{locked} or $m->error('errPolLocked');
# Multi-vote polls
if ($poll->{multi}) {
# Get options
my $options = $m->fetchAllArray("
SELECT id FROM pollOptions WHERE pollId = ?", $pollId);
for my $option (@$options) {
# Check if user has voted for this option
if ($m->paramBool("option_$option->[0]")) {
# Check if user has already voted for this option before
my $votedThis = $m->fetchArray("
SELECT 1
FROM pollVotes
WHERE pollId = :pollId
AND userId = :userId
AND optionId = :optionId",
{ pollId => $pollId, userId => $userId, optionId => $option->[0] });
# Insert vote if it's not a dupe
if (!$votedThis) {
$m->dbDo("
INSERT INTO pollVotes (pollId, userId, optionId) VALUES (?, ?, ?)",
$pollId, $userId, $option->[0]);
}
}
}
}
# Single-vote polls
else {
# Check if an option has been selected
$optionId or $m->error('errPolNoOpt');
# Check if option exists, and is part of this poll
$m->fetchArray("
SELECT id FROM pollOptions WHERE id = ? AND pollId = ?", $optionId, $pollId)
or $m->error('errPolOpNFnd');
# Check if user has already voted
!$m->fetchArray("
SELECT 1 FROM pollVotes WHERE pollId = ? AND userId = ?", $pollId, $userId)
or $m->error('errPolVotedP');
# Insert vote
$m->dbDo("
INSERT INTO pollVotes (pollId, userId, optionId) VALUES (?, ?, ?)",
$pollId, $userId, $optionId);
# Double check votes to make sure no parallel thread inserted votes in single-vote polls
# The PKey (pollId, userId, optionId) takes care of multi-vote polls
my $votes = $m->fetchArray("
SELECT COUNT(*)
FROM pollVotes
WHERE pollId = :pollId
AND userId = :userId
AND optionId = :optionId",
{ pollId => $pollId, userId => $userId, optionId => $optionId });
# Delete all votes if poll got more than one vote
if ($votes > 1) {
$m->dbDo("
DELETE FROM pollVotes WHERE pollId = ? AND userId = ?", $pollId, $userId);
$m->error('errPolVotedP');
}
}
# Log action and finish
$m->logAction(1, 'poll', 'vote', $userId, $boardId, $topicId, undef, $pollId);
$m->redirect('topic_show', tid => $topicId, msg => 'PollVote');