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<?php
class Page_News extends Page
{
/**
* Member variables needed to represent a news entry.
*
* @var newsId int ID of the news entry attributed by the database.
* @var string Title of the entry.
* $newsContent string Content as text. (TODO: html-Support?)
* $newsDate string Unix epoch date of the news' creation.
*/
private $newsId = false;
private $newsTitle = false;
private $newsContent = false;
private $newsDate = false;
/**
* Implementation of the abstract doPreprocess function
*
* Checks if the user is logged in and processes any
* action if one was specified in the request.
*
*/
protected function doPreprocess()
{
// load user, we will need it later
User::load();
// only admins should be able to edit news
if (!User::hasPermission('superadmin')) {
Message::addError('main.no-permission');
Util::redirect('?do=Main');
}
// check which action we need to do
$action = Request::any('action', 'show');
if ($action === 'clear') {
// clear news input fields
// TODO: is this the right way?
$this->newsId = false;
$this->newsTitle = false;
$this->newsContent = false;
$this->newsDate = false;
} elseif ($action === 'show') {
// show news
if (!$this->loadNews(Request::any('newsid'))) {
Message::addError('news-empty');
}
} elseif ($action === 'save') {
// save to DB
if (!$this->saveNews()) {
// re-set the fields we got
Request::post('news-title') ? $this->newsTitle = Request::post('news-title') : $this->newsTitle = false;
Request::post('news-content') ? $this->newsContent = Request::post('news-content') : $this->newsContent = false;
} else {
Message::addSuccess('news-save-success');
Util::redirect('?do=News');
}
} elseif ($action === 'delete') {
// delete it
$this->delNews(Request::post('newsid'));
} else {
// unknown action, redirect user
Message::addError('invalid-action', $action);
Util::redirect('?do=News');
}
}
/**
* Implementation of the abstract doRender function
*
* Fetch the list of news from the database and paginate it.
*
*/
protected function doRender()
{
// fetch the list of the older news
$lines = array();
$paginate = new Paginate("SELECT newsid, dateline, title, content FROM news ORDER BY dateline DESC", 10);
$res = $paginate->exec();
while ($row = $res->fetch(PDO::FETCH_ASSOC)) {
$row['date'] = date('d.m.Y H:i', $row['dateline']);
if ($row['newsid'] == $this->newsId) $row['active'] = "active";
$lines[] = $row;
}
$paginate->render('page-news', array(
'token' => Session::get('token'),
'latestDate' => ($this->newsDate ? date('d.m.Y H:i', $this->newsDate) : '--'),
'latestContent' => $this->newsContent,
'latestTitle' => $this->newsTitle,
'list' => $lines ));
}
/**
* Loads the news with the given ID into the form.
*
* @param int $newsId ID of the news to be shown.
* @return boolean true if loading that news worked
*
*/
private function loadNews($newsId)
{
// check to see if we need to request a specific newsid
if ($newsId !== false) {
$row = Database::queryFirst("SELECT newsid, title, content, dateline FROM news WHERE newsid = :newsid LIMIT 1", array(
'newsid' => $newsId
));
} else {
$row = Database::queryFirst("SELECT newsid, title, content, dateline FROM news ORDER BY dateline DESC LIMIT 1");
}
// fetch the news to be shown
if ($row !== false) {
$this->newsId = $row['newsid'];
$this->newsTitle = $row['title'];
$this->newsContent = $row['content'];
$this->newsDate = $row['dateline'];
}
return $row !== false;
}
/**
* Save the given $newsTitle and $newsContent as POST'ed into the database.
*
*/
private function saveNews()
{
// check if news content were set by the user
$newsTitle = Request::post('news-title');
$newsContent = Request::post('news-content');
if ($newsContent !== '' && $newsTitle !== '') {
// we got title and content, save it to DB
Database::exec("INSERT INTO news (dateline, title, content) VALUES (:dateline, :title, :content)", array(
'dateline' => time(),
'title' => $newsTitle,
'content' => $newsContent
));
return true;
} else {
Message::addError('main.empty-field');
return false;
}
}
/**
* Delete the news entry with ID $newsId
*
* @param int $newsId ID of the entry to be deleted.
*/
private function delNews($newsId)
{
// sanity check: is newsId even numeric?
if (!is_numeric($newsId)) {
Message::addError('main.value-invalid', 'newsid', $newsId);
} else {
// check passed - do delete
Database::exec("DELETE FROM news WHERE newsid = :newsid LIMIT 1", array(
'newsid' => $newsId
));
Message::addSuccess('news-del-success');
}
Util::redirect('?do=News');
}
}
|
