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pages.php
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<?php
/*
This file is part of weeklyd3's wiki software.
weeklyd3's wiki software 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.
weeklyd3's wiki software 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.
You should have received a copy of the GNU General Public
License along with weeklyd3's wiki software. If not, see
<https://www.gnu.org/licenses/>.
*/
class revision {
public function __construct(string $summary, int $id) {
$this->time = time();
$this->author = $_SESSION['userid'];
$this->summary = $summary;
$this->id = $id;
}
}
require_once __DIR__ . "/log/log.php";
function modifyPage(string $name, string $contents, string $editSummary): bool {
if (!isset($_SESSION['username'])) return false;
if (!canEditPage($name)[0]) return false;
$currentuser = $_SESSION['username'];
require_once __DIR__ . "/date.php";
$contents = str_replace("~~~~", "<span class=\"signature\">[[User:$currentuser|$currentuser]] ([[User talk:$currentuser|Leave this user a message]]) " . formatDate(time()) . '</span>', $contents);
$page2ID = json_decode(file_get_contents(__DIR__ . '/pages/page2ID.json'));
if (!isset($page2ID->$name)) {
$currentID = json_decode(file_get_contents(__DIR__ . '/pages/currentPageID.json'));
$page2ID->$name = $currentID;
fwrite(fopen(__DIR__ . '/pages/page2ID.json', 'w+'), json_encode($page2ID));
fwrite(fopen(__DIR__ . '/pages/currentPageID.json', 'w+'), $currentID + 1);
mkdir(__DIR__ . "/pages/data/$currentID", 0777, true);
mkdir(__DIR__ . "/pages/data/$currentID/pastRevisions", 0777, true);
fwrite(fopen(__DIR__ . "/pages/data/$currentID/currentRevisionID.json", "w+"), 0);
}
$id = $page2ID->$name;
$revisionID = json_decode(file_get_contents(__DIR__ . "/pages/data/$id/currentRevisionID.json"));
fwrite(fopen(__DIR__ . "/pages/data/$id/currentRevisionID.json", "w+"), $revisionID + 1);
mkdir(__DIR__ . "/pages/data/$id/pastRevisions/$revisionID", 0777, true);
fwrite(fopen(__DIR__ . "/pages/data/$id/pastRevisions/$revisionID/page.md", "w+"), $contents);
fwrite(fopen(__DIR__ . "/pages/data/$id/page.md", "w+"), $contents);
$revisionDataExists = file_exists(__DIR__ . "/pages/data/$id/revisions.json");
if ($revisionDataExists) $revisions = json_decode(file_get_contents(__DIR__ . "/pages/data/$id/revisions.json"));
else $revisions = array();
array_unshift($revisions, new revision($editSummary, $revisionID));
fwrite(fopen(__DIR__ . "/pages/data/$id/revisions.json", 'w+'), json_encode($revisions));
$newEdit = new stdClass;
$newEdit->pageID = $id;
$newEdit->title = $name;
$newEdit->summary = $editSummary;
$newEdit->author = $_SESSION['userid'];
$newEdit->size = strlen($contents);
$newEdit->revid = $revisionID;
$newEdit->time = time();
$newEdits = json_decode(file_get_contents(__DIR__ . "/mod/recentChanges.json"));
array_unshift($newEdits, $newEdit);
fwrite(fopen(__DIR__ . "/mod/recentChanges.json", 'w+'), json_encode($newEdits));
new logEntry($_SESSION['userid'], null, $name, "edit", "Edited page $name", "Edit summary: $editSummary");
return true;
}
function deletePage(string $title, bool $deleteFileIfExists = true): ?bool {
if (!isset($_SESSION['userid'])) {
return null;
}
$ug = getUserGroups($_SESSION['userid'], true);
global $adminUserGroup;
if (!in_array($adminUserGroup, $ug)) return null;
$pageIndex = json_decode(file_get_contents((__DIR__ . "/pages/page2ID.json")));
if (!isset($pageIndex->$title)) return false;
$id = $pageIndex->$title;
rename(__DIR__ . "/pages/data/$id", __DIR__ . "/deleted-pages/data/$id");
unset($pageIndex->$title);
fwrite(fopen(__DIR__ . "/pages/page2ID.json", "w+"), json_encode($pageIndex));
$deletedPageIndex = json_decode(file_get_contents(__DIR__ . "/deleted-pages/page2IDs.json"));
if (!isset($deletedPageIndex->$title)) $deletedPageIndex->$title = array();
array_push($deletedPageIndex->$title, $id);
fwrite(fopen(__DIR__ . "/deleted-pages/page2IDs.json", "w+"), json_encode($deletedPageIndex));
if (substr($title, 0, 5) === 'File:' && $deleteFileIfExists) {
// Delete the file as well
$filename = cleanFilename(substr($title, 5));
if (file_exists(__DIR__ . "/files/live/$filename")) unlink(__DIR__ . "/files/live/$filename");
}
return true;
}
function displayDeleteLog(string $before): void {
global $originalPageName;
?>
<div class="error">
<?php echo $before; ?>
<table>
<tr>
<th>Username</th>
<th>Time</th>
<th>Type</th>
<th>Comment</th>
<th>Reason</th>
</tr>
<?php
require_once __DIR__ . "/log/log.php";
$entries = queryLog(array('delete', 'undelete', 'protect'), $originalPageName, false);
foreach ($entries as $entry) {
?>
<tr>
<td><?php echo userlink(userinfo($entry->performer)->username); ?></td>
<td><?php echo formatDate($entry->time); ?></td>
<td><?php echo htmlspecialchars($entry->type); ?></td>
<td><?php echo htmlspecialchars($entry->comment); ?></td>
<td><?php echo htmlspecialchars($entry->reason); ?></td>
</tr>
<?php
}
?>
</table>
</div>
<?php
}
/**
* Checks if a page exists.
*
* This function checks if a page exists and was not deleted.
*
* @return bool If the page exists.
* @param string The name of the page.
*/
function page_exists(string $title): bool {
$page2ID = json_decode(file_get_contents(__DIR__ . "/pages/page2ID.json"));
return isset($page2ID->$title);
}
function canEditPage(string $pageName): array {
global $adminUserGroup;
if (!isset($_SESSION['userid'])) return array(false, 'loginRequired');
if (substr($pageName, 0, strlen('Interface:')) === 'Interface:' && !in_array($adminUserGroup, getUserGroups($_SESSION['userid'] ?? '', true))) return array(false, 'interfaceProtected');
$protection = json_decode(file_get_contents("protect.json"));
if (in_array($pageName, $protection) && !in_array($adminUserGroup, getUserGroups($_SESSION['userid'] ?? '', true))) return array(false, 'adminProtected');
return array(true);
}
function sysmsg(string $messageName, ...$args): string {
require_once __DIR__ . "/markdown/parsedown/parsedown.php";
$Parsedown = new Parsedown;
return $Parsedown->text(sysmsg_raw($messageName, ...$args));
}
function sysmsgPlain(string $messageName, ...$args): string {
return htmlspecialchars(sysmsg_raw($messageName, ...$args));
}
$defaultSystemMessages = json_decode(file_get_contents(__DIR__ . "/defaultinterface.json"));
function sysmsg_raw(string $messageName, ...$args): string {
if (isset($_GET['messagenames'])) return "(Interface:$messageName)";
if (page_get_contents("Interface:$messageName")) {
$text = page_get_contents("Interface:$messageName");
foreach (array_reverse($args, true) as $index => $arg) {
$indexplusone = $index + 1;
$text = str_replace("$$indexplusone", $arg, $text);
}
return $text;
}
global $defaultSystemMessages;
if (isset($defaultSystemMessages->$messageName)) {
$text = $defaultSystemMessages->$messageName;
foreach (array_reverse($args, true) as $index => $arg) {
$indexplusone = $index + 1;
$text = str_replace("$$indexplusone", $arg, $text);
}
return $text;
}
return "System message not found: $messageName";
}
function page_get_contents(string $pagename): ?string {
$page2ID = json_decode(file_get_contents(__DIR__ . "/pages/page2ID.json"));
if (!isset($page2ID->$pagename)) return null;
return file_get_contents(__DIR__ . "/pages/data/" . $page2ID->$pagename . "/page.md");
}
global $specialPages;
$specialPages = array();
foreach (scandir("special/", SCANDIR_SORT_NONE) as $page) {
if ($page === "." || $page === '..') continue;
add_special_page(substr($page, 0, -4), __DIR__ . "/special/$page");
}
function add_special_page($name, $filename) {
global $specialPages;
$specialPages[$name] = $filename;
}
function special_page_exists(string $specialPage): bool {
global $specialPages;
return isset($specialPages[$specialPage]);
}
function loadExtension(string $extname) {
if (!is_dir(__DIR__ . "/extensions/$extname")) {
echo sysmsg('invalid-extension', $extname);
return;
}
if (!file_exists(__DIR__ . "/extensions/$extname/index.php")) {
echo sysmsg('malformed-extension', $extname);
return;
}
require __DIR__ . "/extensions/$extname/index.php";
}
function add_system_messages(string $filename): bool {
global $defaultSystemMessages;
if (!file_exists($filename)) return false;
$messages = json_decode(file_get_contents($filename));
if (!$messages) return false;
$messages = (array) $messages;
foreach ($messages as $name => $message) {
$defaultSystemMessages->$name = $message;
}
return true;
}