<?php
function poll_help($section) {
switch ($section) {
case 'admin/help#poll':
$output = '<p>'. t('The poll module can be used to create simple polls for site users. A poll is a simple multiple choice questionnaire which displays the cumulative results of the answers to the poll. Having polls on the site is a good way to get instant feedback from community members.') .'</p>';
$output .= '<p>'. t('Users can create a poll. The title of the poll should be the question, then enter the answers and the "base" vote counts. You can also choose the time period over which the vote will run.The <a href="@poll">poll</a> item in the navigation menu will take you to a page where you can see all the current polls, vote on them (if you haven\'t already) and view the results.', array('@poll' => url('poll'))) .'</p>';
$output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="@poll">Poll page</a>.', array('@poll' => 'http://drupal.org/handbook/modules/poll/')) .'</p>';
return $output;
}
}
function poll_access($op, $node) {
if ($op == 'create') {
return user_access('create polls');
}
}
function poll_block($op = 'list', $delta = 0) {
if (user_access('access content')) {
if ($op == 'list') {
$blocks[0]['info'] = t('Most recent poll');
return $blocks;
}
else if ($op == 'view') {
$sql = db_rewrite_sql("SELECT MAX(n.created) FROM {node} n INNER JOIN {poll} p ON p.nid = n.nid WHERE n.status = 1 AND p.active = 1");
$timestamp = db_result(db_query($sql));
if ($timestamp) {
$poll = node_load(array('type' => 'poll', 'created' => $timestamp, 'status' => 1));
if ($poll->nid) {
$poll = poll_view($poll, TRUE, FALSE, TRUE);
}
}
$block['subject'] = t('Poll');
$block['content'] = drupal_render($poll->content);
return $block;
}
}
}
function poll_cron() {
$result = db_query('SELECT p.nid FROM {poll} p INNER JOIN {node} n ON p.nid = n.nid WHERE (n.created + p.runtime) < '. time() .' AND p.active = 1 AND p.runtime != 0');
while ($poll = db_fetch_object($result)) {
db_query("UPDATE {poll} SET active = 0 WHERE nid = %d", $poll->nid);
}
}
function poll_delete($node) {
db_query("DELETE FROM {poll} WHERE nid = %d", $node->nid);
db_query("DELETE FROM {poll_choices} WHERE nid = %d", $node->nid);
db_query("DELETE FROM {poll_votes} WHERE nid = %d", $node->nid);
}
function poll_submit(&$node) {
$node->choice = array_values($node->choice);
$node->teaser = poll_teaser($node);
}
function poll_validate($node) {
if (isset($node->title)) {
$realchoices = 0;
$node->choice = array_values($node->choice);
foreach ($node->choice as $i => $choice) {
if ($choice['chtext'] != '') {
$realchoices++;
}
if ($choice['chvotes'] < 0) {
form_set_error("choice][$i][chvotes", t('Negative values are not allowed.'));
}
}
if ($realchoices < 2) {
form_set_error("choice][$realchoices][chtext", t('You must fill in at least two choices.'));
}
}
}
function poll_form($node, $form_values = NULL) {
$admin = user_access('administer nodes');
$type = node_get_types('type', $node);
$form['title'] = array(
'#type' => 'textfield',
'#title' => check_plain($type->title_label),
'#required' => TRUE,
'#default_value' => $node->title,
'#weight' => -1
);
if (isset($form_values)) {
$choices = $form_values['choices'];
if ($form_values['morechoices']) {
$choices *= 2;
}
}
else {
$choices = max(2, count($node->choice) ? count($node->choice) : 5);
}
$form['choices'] = array(
'#type' => 'hidden',
'#value' => $choices,
);
$form['choice'] = array(
'#type' => 'fieldset',
'#title' => t('Choices'),
'#prefix' => '<div class="poll-form">',
'#suffix' => '</div>',
'#tree' => TRUE
);
$form['choice']['morechoices'] = array(
'#type' => 'checkbox',
'#parents' => array('morechoices'),
'#title' => t('Need more choices'),
'#value' => 0,
'#description' => t("If the amount of boxes above isn't enough, check this box and click the Preview button below to add some more."),
'#weight' => 1,
);
for ($a = 0; $a < $choices; $a++) {
$form['choice'][$a]['chtext'] = array(
'#type' => 'textfield',
'#title' => t('Choice @n', array('@n' => ($a + 1))),
'#default_value' => $node->choice[$a]['chtext'],
);
if ($admin) {
$form['choice'][$a]['chvotes'] = array(
'#type' => 'textfield',
'#title' => t('Votes for choice @n', array('@n' => ($a + 1))),
'#default_value' => (int)$node->choice[$a]['chvotes'],
'#size' => 5, '#maxlength' => 7
);
}
}
$_duration = array(0 => t('Unlimited')) + drupal_map_assoc(array(86400, 172800, 345600, 604800, 1209600, 2419200, 4838400, 9676800, 31536000), "format_interval");
$_active = array(0 => t('Closed'), 1 => t('Active'));
if ($admin) {
$form['settings'] = array('#type' => 'fieldset', '#title' => t('Settings'));
$form['settings']['active'] = array(
'#type' => 'radios',
'#title' => t('Poll status'),
'#default_value' => isset($node->active) ? $node->active : 1,
'#options' => $_active,
'#description' => t('When a poll is closed, visitors can no longer vote for it.')
);
}
$form['settings']['runtime'] = array(
'#type' => 'select',
'#title' => t('Poll duration'),
'#default_value' => $node->runtime,
'#options' => $_duration,
'#description' => t('After this period, the poll will be closed automatically.'),
);
$form['#multistep'] = TRUE;
return $form;
}
function poll_insert($node) {
if (!user_access('administer nodes')) {
foreach ($node->choice as $i => $choice) {
$node->choice[$i]['chvotes'] = 0;
}
$node->active = 1;
}
db_query("INSERT INTO {poll} (nid, runtime, active) VALUES (%d, %d, %d)", $node->nid, $node->runtime, $node->active);
$i = 0;
foreach ($node->choice as $choice) {
if ($choice['chtext'] != '') {
db_query("INSERT INTO {poll_choices} (nid, chtext, chvotes, chorder) VALUES (%d, '%s', %d, %d)", $node->nid, $choice['chtext'], $choice['chvotes'], $i++);
}
}
}
function poll_menu($may_cache) {
$items = array();
if ($may_cache) {
$items[] = array('path' => 'poll', 'title' => t('Polls'),
'callback' => 'poll_page',
'access' => user_access('access content'),
'type' => MENU_SUGGESTED_ITEM);
$items[] = array('path' => 'poll/vote',
'title' => t('Vote'),
'callback' => 'poll_vote',
'access' => user_access('vote on polls'),
'type' => MENU_CALLBACK);
$items[] = array('path' => 'poll/cancel',
'title' => t('Cancel'),
'callback' => 'poll_cancel',
'access' => user_access('cancel own vote'),
'type' => MENU_CALLBACK);
}
else {
drupal_add_css(drupal_get_path('module', 'poll') .'/poll.css');
if (arg(0) == 'node' && is_numeric(arg(1))) {
$node = node_load(arg(1));
if ($node->type == 'poll') {
$items[] = array('path' => 'node/'. arg(1) .'/votes',
'title' => t('Votes'),
'callback' => 'poll_votes',
'access' => user_access('inspect all votes'),
'weight' => 3,
'type' => MENU_LOCAL_TASK);
}
if ($node->type == 'poll' && $node->allowvotes) {
$items[] = array('path' => 'node/'. arg(1) .'/results',
'title' => t('Results'),
'callback' => 'poll_results',
'access' => user_access('access content'),
'weight' => 3,
'type' => MENU_LOCAL_TASK);
}
}
}
return $items;
}
function poll_load($node) {
global $user;
$poll = db_fetch_object(db_query("SELECT runtime, active FROM {poll} WHERE nid = %d", $node->nid));
$result = db_query("SELECT chtext, chvotes, chorder FROM {poll_choices} WHERE nid = %d ORDER BY chorder", $node->nid);
while ($choice = db_fetch_array($result)) {
$poll->choice[$choice['chorder']] = $choice;
}
$poll->allowvotes = FALSE;
if (user_access('vote on polls') && $poll->active) {
if ($user->uid) {
$result = db_fetch_object(db_query('SELECT chorder FROM {poll_votes} WHERE nid = %d AND uid = %d', $node->nid, $user->uid));
}
else {
$result = db_fetch_object(db_query("SELECT chorder FROM {poll_votes} WHERE nid = %d AND hostname = '%s'", $node->nid, $_SERVER['REMOTE_ADDR']));
}
if (isset($result->chorder)) {
$poll->vote = $result->chorder;
}
else {
$poll->vote = -1;
$poll->allowvotes = TRUE;
}
}
return $poll;
}
function poll_node_info() {
return array(
'poll' => array(
'name' => t('Poll'),
'module' => 'poll',
'description' => t("A poll is a multiple-choice question which visitors can vote on."),
'title_label' => t('Question'),
'has_body' => FALSE,
)
);
}
function poll_page() {
$sql = db_rewrite_sql("SELECT n.nid, n.title, p.active, n.created, SUM(c.chvotes) AS votes FROM {node} n INNER JOIN {poll} p ON n.nid = p.nid INNER JOIN {poll_choices} c ON n.nid = c.nid WHERE n.status = 1 GROUP BY n.nid, n.title, p.active, n.created ORDER BY n.created DESC");
$count_sql = db_rewrite_sql('SELECT COUNT(*) FROM {node} n INNER JOIN {poll} p ON n.nid = p.nid WHERE n.status = 1');
$result = pager_query($sql, 15, 0, $count_sql);
$output = '<ul>';
while ($node = db_fetch_object($result)) {
$output .= '<li>'. l($node->title, "node/$node->nid") .' - '. format_plural($node->votes, '1 vote', '@count votes') .' - '. ($node->active ? t('open') : t('closed')) .'</li>';
}
$output .= '</ul>';
$output .= theme("pager", NULL, 15);
return $output;
}
function poll_perm() {
return array('create polls', 'vote on polls', 'cancel own vote', 'inspect all votes');
}
function poll_teaser($node) {
$teaser = NULL;
if (is_array($node->choice)) {
foreach ($node->choice as $k => $choice) {
if ($choice['chtext'] != '') {
$teaser .= '* '. check_plain($choice['chtext']) ."\n";
}
}
}
return $teaser;
}
function poll_view_voting($node, $block) {
if ($node->choice) {
$list = array();
foreach ($node->choice as $i => $choice) {
$list[$i] = check_plain($choice['chtext']);
}
$form['choice'] = array(
'#type' => 'radios',
'#title' => $block ? check_plain($node->title) : '',
'#default_value' => -1,
'#options' => $list,
);
}
$form['nid'] = array('#type' => 'hidden', '#value' => $node->nid);
$form['vote'] = array('#type' => 'submit', '#value' => t('Vote'));
$form['#action'] = url('node/'. $node->nid);
return $form;
}
function theme_poll_view_voting($form) {
$output .= '<div class="poll">';
$output .= ' <div class="vote-form">';
$output .= ' <div class="choices">';
$output .= drupal_render($form['choice']);
$output .= ' </div>';
$output .= drupal_render($form['nid']);
$output .= drupal_render($form['vote']);
$output .= ' </div>';
$output .= drupal_render($form);
$output .= '</div>';
return $output;
}
function poll_view_results(&$node, $teaser, $page, $block) {
foreach ($node->choice as $choice) {
$total_votes += $choice['chvotes'];
$max_votes = max($max_votes, $choice['chvotes']);
}
foreach ($node->choice as $i => $choice) {
if ($choice['chtext'] != '') {
$poll_results .= theme('poll_bar', check_plain($choice['chtext']), round($choice['chvotes'] * 100 / max($total_votes, 1)), format_plural($choice['chvotes'], '1 vote', '@count votes'), $block);
}
}
$output .= theme('poll_results', check_plain($node->title), $poll_results, $total_votes, $node->links, $block, $node->nid, $node->vote);
return $output;
}
function theme_poll_results($title, $results, $votes, $links, $block, $nid, $vote) {
if ($block) {
$output .= '<div class="poll">';
$output .= '<div class="title">'. $title .'</div>';
$output .= $results;
$output .= '<div class="total">'. t('Total votes: %votes', array('%votes' => $votes)) .'</div>';
$output .= '</div>';
$output .= '<div class="links">'. theme('links', $links) .'</div>';
}
else {
$output .= '<div class="poll">';
$output .= $results;
$output .= '<div class="total">'. t('Total votes: %votes', array('%votes' => $votes)) .'</div>';
if (isset($vote) && $vote > -1 && user_access('cancel own vote')) {
$output .= drupal_get_form('poll_cancel_form', $nid);
}
$output .= '</div>';
}
return $output;
}
function poll_cancel_form($nid) {
$form['#action'] = url("poll/cancel/$nid");
$form['submit'] = array('#type' => 'submit', '#value' => t('Cancel your vote'));
return $form;
}
function theme_poll_bar($title, $percentage, $votes, $block) {
if ($block) {
$output = '<div class="text">'. $title .'</div>';
$output .= '<div class="bar"><div style="width: '. $percentage .'%;" class="foreground"></div></div>';
$output .= '<div class="percent">'. $percentage .'%</div>';
}
else {
$output = '<div class="text">'. $title .'</div>';
$output .= '<div class="bar"><div style="width: '. $percentage .'%;" class="foreground"></div></div>';
$output .= '<div class="percent">'. $percentage .'% ('. $votes .')</div>';
}
return $output;
}
function poll_results() {
if ($node = node_load(arg(1))) {
drupal_set_title(check_plain($node->title));
return node_show($node, 0);
}
else {
drupal_not_found();
}
}
function poll_votes() {
if ($node = node_load(arg(1))) {
drupal_set_title(check_plain($node->title));
$output = t('This table lists all the recorded votes for this poll. If anonymous users are allowed to vote, they will be identified by the IP address of the computer they used when they voted.');
$header[] = array('data' => t('Visitor'), 'field' => 'u.name');
$header[] = array('data' => t('Vote'), 'field' => 'pv.chorder');
$result = pager_query("SELECT pv.chorder, pv.uid, pv.hostname, u.name FROM {poll_votes} pv LEFT JOIN {users} u ON pv.uid = u.uid WHERE pv.nid = %d" . tablesort_sql($header), 20, 0, NULL, $node->nid);
$rows = array();
while ($vote = db_fetch_object($result)) {
$rows[] = array(
$vote->name ? theme('username', $vote) : check_plain($vote->hostname),
check_plain($node->choice[$vote->chorder]['chtext']));
}
$output .= theme('table', $header, $rows);
$output .= theme('pager', NULL, 20, 0);
print theme('page', $output);
}
else {
drupal_not_found();
}
}
function poll_vote(&$node) {
global $user;
$nid = arg(1);
if ($node = node_load($nid)) {
$edit = $_POST;
$choice = $edit['choice'];
$vote = $_POST['vote'];
if (isset($choice) && isset($node->choice[$choice])) {
if ($node->allowvotes) {
if ($user->uid) {
db_query('INSERT INTO {poll_votes} (nid, chorder, uid) VALUES (%d, %d, %d)', $node->nid, $choice, $user->uid);
}
else {
db_query("INSERT INTO {poll_votes} (nid, chorder, hostname) VALUES (%d, %d, '%s')", $node->nid, $choice, $_SERVER['REMOTE_ADDR']);
}
db_query("UPDATE {poll_choices} SET chvotes = chvotes + 1 WHERE nid = %d AND chorder = %d", $node->nid, $choice);
$node->allowvotes = FALSE;
$node->choice[$choice]['chvotes']++;
cache_clear_all();
drupal_set_message(t('Your vote was recorded.'));
}
else {
drupal_set_message(t("You are not allowed to vote on this poll."), 'error');
}
}
else {
drupal_set_message(t("You did not specify a valid poll choice."), 'error');
}
drupal_goto('node/'. $nid);
}
else {
drupal_not_found();
}
}
function poll_cancel(&$node) {
global $user;
$nid = arg(2);
if ($node = node_load($nid)) {
if ($node->type == 'poll' && $node->allowvotes == FALSE) {
if ($user->uid) {
db_query('DELETE FROM {poll_votes} WHERE nid = %d and uid = %d', $node->nid, $user->uid);
}
else {
db_query("DELETE FROM {poll_votes} WHERE nid = %d and hostname = '%s'", $node->nid, $_SERVER['REMOTE_ADDR']);
}
db_query("UPDATE {poll_choices} SET chvotes = chvotes - 1 WHERE nid = %d AND chorder = %d", $node->nid, $node->vote);
$node->allowvotes = TRUE;
$node->choice[$node->vote]['chvotes']--;
drupal_set_message(t('Your vote was canceled.'));
}
else {
drupal_set_message(t("You are not allowed to cancel an invalid poll choice."), 'error');
}
drupal_goto('node/'. $nid);
}
else {
drupal_not_found();
}
}
function poll_view($node, $teaser = FALSE, $page = FALSE, $block = FALSE) {
global $user;
$output = '';
if ($block) {
$node->readmore = FALSE;
$links = module_invoke_all('link', 'node', $node, 1);
$links[] = array('title' => t('Older polls'), 'href' => 'poll', 'attributes' => array('title' => t('View the list of polls on this site.')));
if ($node->allowvotes && $block) {
$links[] = array('title' => t('Results'), 'href' => 'node/'. $node->nid .'/results', 'attributes' => array('title' => t('View the current poll results.')));
}
$node->links = $links;
}
if ($node->allowvotes && ($block || arg(2) != 'results')) {
if ($_POST['op'] == t('Vote')) {
poll_vote($node);
}
$node->content['body'] = array(
'#value' => drupal_get_form('poll_view_voting', $node, $block),
);
}
else {
$node->content['body'] = array(
'#value' => poll_view_results($node, $teaser, $page, $block),
);
}
return $node;
}
function poll_update($node) {
db_query('UPDATE {poll} SET runtime = %d, active = %d WHERE nid = %d', $node->runtime, $node->active, $node->nid);
db_query('DELETE FROM {poll_choices} WHERE nid = %d', $node->nid);
$new_chorder = 0;
foreach ($node->choice as $old_chorder => $choice) {
$chvotes = isset($choice['chvotes']) ? (int)$choice['chvotes'] : 0;
$chtext = $choice['chtext'];
if (!empty($chtext)) {
db_query("INSERT INTO {poll_choices} (nid, chtext, chvotes, chorder) VALUES (%d, '%s', %d, %d)", $node->nid, $chtext, $chvotes, $new_chorder);
if ($new_chorder != $old_chorder) {
db_query("UPDATE {poll_votes} SET chorder = %d WHERE nid = %d AND chorder = %d", $new_chorder, $node->nid, $old_chorder);
}
$new_chorder++;
}
else {
db_query("DELETE FROM {poll_votes} WHERE nid = %d AND chorder = %d", $node->nid, $old_chorder);
}
}
}
function poll_user($op, &$edit, &$user) {
if ($op == 'delete') {
db_query('UPDATE {poll_votes} SET uid = 0 WHERE uid = %d', $user->uid);
}
}