<?php
/**
* Poll Plugin: allows to create simple polls
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Esther Brunner <wikidesign@gmail.com>
*/
if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
/**
* All DokuWiki plugins to extend the parser/rendering mechanism
* need to inherit from this class
*/
class syntax_plugin_poll extends DokuWiki_Syntax_Plugin {
/**
* return some info
*/
function getInfo() {
return confToHash(dirname(__FILE__).'/INFO');
}
function getType() { return 'substition';}
function getPType() { return 'block';}
function getSort() { return 167; }
/**
* Connect pattern to lexer
*/
function connectTo($mode) {
$this->Lexer->addSpecialPattern('<poll.*?>.+?</poll>', $mode, 'plugin_poll');
}
/**
* Handle the match
*/
function handle($match, $state, $pos, &$handler) {
$match = substr($match, 6, -7); // strip markup
list($title, $options) = preg_split('/>/u', $match, 2);
if (!$options) {
$options = $title;
$title = NULL;
}
$options = explode('*', $options);
$c = count($options);
for ($i = 0; $i < $c; $i++) {
$options[$i] = trim($options[$i]);
}
return array(trim($title), $options);
}
/**
* Create output
*/
function render($mode, &$renderer, $data) {
if ($mode == 'xhtml') {
global $ID;
$options = $data[1];
$title = $renderer->_xmlEntities($data[0]);
// prevent caching to ensure the poll results are fresh
$renderer->info['cache'] = false;
// get poll file contents
$pfile = metaFN(md5($title), '.poll');
$poll = unserialize(@file_get_contents($pfile));
// output the poll
$renderer->doc .= '<fieldset class="poll">'.
'<legend>'.$title.'</legend>';
$more = trim(array_shift($options));
if ($more) {
$renderer->doc .= '<div>'.$renderer->_xmlEntities($more).'</div>';
}
// check if user has voted already
$ip = clientIP(true);
if (isset($poll['ips']) && in_array($ip, $poll['ips'])) {
// display results
$renderer->doc .= $this->_pollResults($poll);
} elseif ($vote = $_REQUEST['vote']) {
// user has just voted -> update results
$c = count($options);
for ($i = 0; $i < $c; $i++) {
$opt = $renderer->_xmlEntities($options[$i]);
if ($vote == $opt) {
$poll['results'][$opt] += 1;
$poll['votes'] += 1;
$poll['ips'][] = $ip;
} elseif (!isset($poll['results'][$opt])) {
$poll['results'][$opt] = 0;
}
}
$fh = fopen($pfile, 'w');
fwrite($fh, serialize($poll));
fclose($fh);
// display results
$renderer->doc .= $this->_pollResults($poll);
} elseif (count($options) > 0) {
// display poll form
$renderer->doc .= $this->_pollForm($options, $renderer);
} else {
// display results
$renderer->doc .= $this->_pollResults($poll);
}
$renderer->doc .= '</fieldset>';
return true;
}
return false;
}
function _pollResults($poll) {
$total = $poll['votes'];
if ($total == 0) return '';
$ret = '<table class="blind">';
$c = count($poll['results']);
$options = array_keys($poll['results']);
$votes = array_values($poll['results']);
for ($i = 0; $i < $c; $i++) {
$absolute = $votes[$i];
$percent = round(($absolute*100)/$total);
$ret .= '<tr><td>'.$options[$i].'</td><td><div class="poll_bar">';
if ($percent) $ret .= '<div class="poll_full" style="width:'.($percent*2).'px"> </div>';
$ret .= '</div></td><td class="rightalign">'.$percent.'%</td>'.
'<td class="rightalign">('.$absolute.')</td></tr>';
}
$ret .= '</table>';
return $ret;
}
function _pollForm($options, &$renderer) {
global $lang;
global $ID;
$i = 0;
$ret = '<form id="poll__form" method="post" action="'.script().'" accept-charset="'.$lang['encoding'].'"><div class="no">'.
'<input type="hidden" name="do" value="show" />'.
'<input type="hidden" name="id" value="'.$ID.'" />';
foreach ($options as $option) {
$i++;
$option = $renderer->_xmlEntities($option);
$ret.= '<label class="simple" for="poll__option'.$i.'">'.
'<input type="radio" name="vote" id="poll__option'.$i.'" '.
'value="'.$option.'" /> <span>'.$option.'</span></label>';
}
$ret .= '<input class="button" type="submit" '.
'value="'.$this->getLang('btn_vote').'" />'.
'</div></form>';
return $ret;
}
}
// vim:ts=4:sw=4:et:enc=utf-8:
