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<?php
/**
* wiki.php
*
* This script is needed to redirect wiki pages referenced by an URL to the old wiki
* (before Stud.IP 5.5) to the controller of the new wiki (Stud.IP 5.5 and newer).
*
* @author Jan-Hendrik Willms <tleilax+studip@gmail.com>
* @author Moritz Strohm <strohm@data-quest.de>
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
* @category Stud.IP
* @since 5.5
*/
// Set up a minimal Stud.IP environment:
require_once __DIR__ . '/../lib/bootstrap.php';
URLHelper::setBaseUrl($GLOBALS['ABSOLUTE_URI_STUDIP']);
// Set exception handler which outputs the message of the exception.
// In case the Stud.IP is in development mode, the stack trace
// is also printed before halting execution.
set_exception_handler(function (Throwable $exception) {
header('Content-Type: text/plain');
echo $exception->getMessage();
if (Studip\ENV === 'development') {
echo "\n" . $exception->getTraceAsString();
}
die;
});
// Handle URL parameters:
$course_id = Request::option('cid');
$keyword = Request::get('keyword');
$version = Request::int('version');
if (!$course_id) {
// Invalid wiki page.
die(sprintf(_('Fehlender URL-Parameter: %s'), 'cid'));
}
// Load the wiki page or a version of it:
$page = null;
$page_version = null;
if (!$keyword || $keyword === 'WikiWikiWeb') {
// Load the start page for the course:
$page_id = CourseConfig::get($course_id)->getValue('WIKI_STARTPAGE_ID');
$load_newest_version = true;
if ($version) {
// Check if the requested version is the newest version.
// In that case, the wiki_pages table instead of the wiki_versions
// table must be used to get the correct version of the page.
$newest_version = 1 + WikiVersion::countByPage_id($page_id);
$load_newest_version = $version === $newest_version;
}
if ($load_newest_version) {
// Load the newest version:
$page = WikiPage::find($page_id);
} else {
// Load the requested version:
$page_version = WikiVersion::findOneBySQL(
'`page_id` = :page_id
ORDER BY `mkdate` ASC
LIMIT 1 OFFSET :version',
[
'page_id' => $page_id,
'version' => $version - 1
]
);
}
} else {
// Load the page by its keyword and course-ID:
$load_newest_version = true;
if ($version) {
// Check if the requested version is the newest version.
// In that case, the wiki_pages table instead of the wiki_versions
// table must be used to get the correct version of the page.
$newest_version = 1 + WikiVersion::countBySql(
'JOIN `wiki_pages` USING (`page_id`)
WHERE `wiki_pages`.`range_id` = :course_id AND `wiki_pages`.`name` = :keyword',
[
'course_id' => $course_id,
'keyword' => $keyword
]
);
$load_newest_version = $version === $newest_version;
}
if ($load_newest_version) {
// Load the newest version:
$page = WikiPage::findOneBySQL(
'`range_id` = :course_id AND `name` = :keyword',
[
'course_id' => $course_id,
'keyword' => $keyword
]
);
} else {
// Load the requested version:
$page_version = WikiVersion::findOneBySQL(
'JOIN `wiki_pages` USING (`page_id`)
WHERE `wiki_pages`.`range_id` = :course_id AND `wiki_pages`.`name` = :keyword
ORDER BY `wiki_versions`.`mkdate` ASC
LIMIT 1 OFFSET :version',
[
'course_id' => $course_id,
'keyword' => $keyword,
'version' => $version - 1
]
);
}
}
if (!$page && !$page_version) {
// Page not found:
die(sprintf(_('Die Wikiseite mit dem Schlagwort "%s" wurde nicht gefunden.'), $keyword));
}
// Everything went well: Redirect permanently to the new wiki page.
// Assume that the optional version parameter is not set and redirect to the newest
// version of the wiki page, which should be the usual case.
$url = URLHelper::getURL('dispatch.php/course/wiki/page/' . $page->id, ['cid' => $course_id]);
if ($page_version) {
//Redirect to the specific version of the wiki page instead of the newest version:
$url = URLHelper::getURL('dispatch.php/course/wiki/version/' . $page_version->id, ['cid' => $course_id]);
}
header('Location: ' . $url, true, 301);
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