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admin.php
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admin.php
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<?php
/****************************************************************************** */
// Configuration section, you can make changes here.
define("PASSWORD", 'ADD PASSWORD HERE');
define("UPLOAD_DIR", "img/");
define("SNIPPET_DIR", "cmsnippets");
define("ADMIN_CONTENT", "adminContent.php");
$excludedFiles = [
"admin.php",
"header.php",
"footer.php",
"mail.php",
ADMIN_CONTENT
];
// End of configuration section, don't make changes below.
/****************************************************************************** */
session_start();
// check if user has correct csrf token or let user log in
check_auth();
$currentFile = '';
if(isset($_POST["task"])) {
switch ($_POST["task"]) {
case 'upload-file':
upload_file();
break;
case 'remove-file':
remove_file();
break;
case 'save':
save();
break;
case "reload":
reload();
break;
case "get-snippet":
get_snippet();
break;
default:
echo "Error: We could not find the task you are trying to do";
break;
}
die();
}
if(!file_exists(ADMIN_CONTENT)) {
fillContent('');
}
try {
if (!include ADMIN_CONTENT) {
unlink(ADMIN_CONTENT);
echo "Error file couldn't load";
}
} catch(\Throwable $ex) {
echo "Error file couldn't load";
unlink(ADMIN_CONTENT);
}
/****************************************************************************** */
function upload_file(){
// If file is uploaded
if (isset($_FILES["fileToUpload"])) {
$target_dir = UPLOAD_DIR;
if (!file_exists($target_dir)) {
mkdir($target_dir);
}
if($_FILES["fileToUpload"]["error"] !== UPLOAD_ERR_OK) {
echo "Invalid upload";
} else {
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
// Check if image file is a actual image or fake image
if(getimagesize($_FILES["fileToUpload"]["tmp_name"]) === false) {
echo "File is not an image.";
} else {
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "Your file was successfully uploaded";
} else {
echo "Sorry, there was an error uploading your file.";
}
}
}
}
}
}
function remove_file() {
//remove image
if (isset($_POST["fileDelete"])) {
$file = get_safe_path($_POST["fileDelete"]);
if(is_file($file)) {
unlink($file);
echo "successfully deleted file";
}
}
}
function get_snippet() {
//remove image
if (isset($_POST["snippet_file"])) {
$file = get_safe_path($_POST["snippet_file"]);
if(is_file($file)) {
$snippet = file_get_contents($file);
echo $snippet;
}
}
}
function save(){
//this is executed when 'Save' is pressed and will set the value to the editted value
if (isset($_POST["file"]) && isset($_POST["content"])) {
$file = get_safe_path($_POST["file"]);
$content = '<!doctype html><html>'.$_POST["content"].'</html>';
$content = fillPhp($file, $content);
//remove the editable content tags
$content = str_replace('contenteditable="true"', '', $content);
$content = str_replace('<!--?php', '<?php', $content);
$content = str_replace('?-->', '?>', $content);
//remove the inserted js
$pattern1 = '/<!--CMSingleBegin-->.*<!--CMSingleEnd-->/s';
$pattern2 = '/^.*<!--CMSingleEnd-->/s';
$pattern3 = '/<!--CMSingleBegin-->.*$/s';
$replacement = '';
$content = preg_replace($pattern1, $replacement, $content);
$content = preg_replace($pattern2, $replacement, $content);
$content = preg_replace($pattern3, $replacement, $content);
//write editted content to file
$fp = fopen($file, 'w') or die("Unable to open file!");
fwrite($fp, $content);
fclose($fp);
}
}
function reload(){
global $currentFile;
// if the user specified a page to go to, set it here
if (isset($_POST["goto"])) {
$currentFile = get_safe_path($_POST["goto"]);
if(!file_exists($currentFile)) {
$currentFile = "";
}
fillContent($currentFile);
echo "reload";
}
}
/**
* Fills admin content with the content of the given page with the editor inserted into it
*
* @param string $currentFile
*/
function fillContent($currentFile='') {
// scan directory for html/php files and set current file if this hasn't happened already
$webpages = getWebpages();
//if we haven't chosen a current page yet choose the first page
if ($currentFile === '') {
if (count($webpages) === 0) {
die("no webpages found!");
}
$currentFile = $webpages[0];
}
//get content of current file
$content = file_get_contents($currentFile);
if($content === false) {
die("Unable to open file!");
}
//add contenteditable property
$content = str_replace('<?php', '<!--CMSingle_PHP_BEGIN--><?php', $content);
$content = str_replace('?>', '?><!--CMSingle_PHP_END-->', $content);
//make links for all webpages
$links = '';
foreach ($webpages as $page) {
$links .= '<option value="'.$page.'">'.$page.'</option>';
}
function getDirContents($path) {
$files = [];
if (file_exists($path)) {
$rii = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path));
foreach ($rii as $file)
if (!$file->isDir())
$files[] = $file->getPathname();
}
return $files;
}
$images = getDirContents('.');
$options = '';
foreach ($images as $image) {
if (@getimagesize($image)) {
//echo $image;
$image = str_replace('\\', '/', $image);
//echo $image;
$options .= '<option value="'.$image.'">'.$image.'</option>';
}
}
$snippets = getDirContents(SNIPPET_DIR);
$snippet_options = '';
foreach ($snippets as $snippet) {
if (is_readable($snippet)) {
$snippet_options .= '<option value="'.$snippet.'">'.$snippet.'</option>';
}
}
$additionalContent = '
<!--CMSingleBegin-->
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.1/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
<style type="text/css" scoped>
select {
width:100%;
overflow:hidden;
white-space:nowrap;
text-overflow:ellipsis;
}
select option {
width:100px;
text-overflow:ellipsis;
overflow:hidden;
}
</style>
<!-- Modal -->
<div id="exampleModal" contenteditable="false" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Change image to ...</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<select id="imgselect" onchange="setPreview()">'.$options.'</select>
<br>
<img id="previewImg" style="width: 100%; margin: 20px auto;" src=""/>
</div>
<div class="modal-footer">
<button id="closeMyModal" type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button id="setI" type="button" class="btn btn-primary" onclick="setImg()">Change Image</button>
<button id="removeI" type="button" class="btn btn-primary" onclick="removeImg()">Remove Image</button>
</div>
</div>
</div>
</div>
<div id="editBar" contenteditable="false" style="position:fixed; bottom:0; right:0; z-index: 9; background-color: #f7faff; box-shadow: inset -4px -5px 34px -6px rgba(0,0,0,0.67); max-height: 1000px; transition: max-height 1s;">
<div id="toggle" style="width:100%; padding:10px; background-color: #c4c7cc;text-align: center;" onclick="toggleV()"><i id="toggleBtn" class="fas fa-chevron-down"></i></div>
<div style="margin:10px;">
<h3>Editor</h3>
<button onclick="document.execCommand(\'bold\',false,null);"><i class="fas fa-bold"></i></button>
<button onclick="document.execCommand(\'italic\',false,null);"><i class="fas fa-italic"></i></button>
<button onclick="document.execCommand(\'underline\',false,null);"><i class="fas fa-underline"></i></button>
<button onclick="insertImg()"><i class="fas fa-image"></i>+</button>
<br>
<button onclick="document.execCommand(\'decreaseFontSize\',false,null);">A<i class="fas fa-long-arrow-alt-down"></i></button>
<button onclick="document.execCommand(\'increaseFontSize\',false,null);">A<i class="fas fa-long-arrow-alt-up"></i></button>
<br>
<form id="uploadForm" action="admin.php" method="post" enctype="multipart/form-data">
<input type="file" name="fileToUpload" id="fileToUpload" onchange="submitUpload()">
</form>
<button data-toggle="modal" data-target="#exampleModal" onclick="callRemove()">Remove Image</button>
<button class="d-none" id="editImageBtn" data-toggle="modal" data-target="#exampleModal"></button>
<input style="width:100%;" type="button" id="saveBtn" value="Save" onclick="saveFile()"/>
<br>
<h4 style="margin:5px 0">Webpages</h4>
<select onchange="goTo(this.value)" style="width:100%; margin:5px 0">
<option disabled selected value> -- select a page -- </option>
'.$links.'
</select>
<h4 style="margin:5px 0">Snippets</h4>
<select id="snippet-select" style="width:88%; margin:5px 0">
<option disabled selected value> -- select a snippet -- </option>
'.$snippet_options.'
</select>
<button style="width:10%;" onclick="insertSnippet()">+</button>
<br>
</div>
</div>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script>
var curPage = "'.$currentFile.'"
function saveFile() {
const url = "admin.php"
const formData = new FormData()
formData.append("task", "save")
formData.append("file", curPage)
formData.append("content", document.documentElement.innerHTML)
formData.append("_token", "'.csrf_token().'")
fetch(url, {
method: "POST",
body: formData,
})
.then(response => response.text())
.then(response => {
alert("successfully saved") //TODO
})
}
function goTo(file) {
const url = "admin.php"
const formData = new FormData()
formData.append("goto", file)
formData.append("task", "reload")
formData.append("_token", "'.csrf_token().'")
fetch(url, {
method: "POST",
body: formData,
})
.then(response => response.text())
.then(response => {
if (response === "reload") {
location.reload();
}
})
}
var toggled = false;
function toggleV() {
if (toggled) {
document.getElementById("editBar").style.maxHeight = "35px";
document.getElementById("toggleBtn").classList.add("fa-chevron-up");
document.getElementById("toggleBtn").classList.remove("fa-chevron-down");
} else {
document.getElementById("editBar").style.maxHeight = "1000px";
document.getElementById("toggleBtn").classList.add("fa-chevron-down");
document.getElementById("toggleBtn").classList.remove("fa-chevron-up");
}
toggled = !toggled;
}
function submitUpload() {
const url = "admin.php"
const formData = new FormData()
let image = document.getElementById("fileToUpload").files[0];
formData.append("task", "upload-file")
formData.append("fileToUpload", image)
formData.append("_token", "'.csrf_token().'")
fetch(url, {
method: "POST",
body: formData,
})
.then(response => response.text())
.then(response => {
alert(response);
if (response === "Your file was successfully uploaded") {
let x = document.getElementById("imgselect");
let option = document.createElement("option");
option.text = "'.UPLOAD_DIR.'"+image.name;
option.value = "'.UPLOAD_DIR.'"+image.name;
x.add(option);
}
});
}
function removeImg() {
let e = document.getElementById("imgselect");
let value = e.options[e.selectedIndex].value;
const formData = new FormData();
formData.append("task", "remove-file");
formData.append("_token", "'.csrf_token().'");
formData.append("fileDelete", value);
fetch("admin.php", {
method: "POST",
body: formData,
})
.then(response => response.text())
.then(response => {
if (response === "successfully deleted file") {
e.remove(e.selectedIndex);
}
alert(response);
});
}
var imgEditting;
$(window).on("load", function() {
document.body.contentEditable = true
$("img").click(function(){
imgEditting = this;
document.getElementById("setI").style.display = "block";
document.getElementById("removeI").style.display = "none";
$("#editImageBtn").click();
});
});
function addListeners() {
$("img").click(function(){
imgEditting = this;
$("#exampleModal").modal("show");
document.getElementById("setI").style.display = "block";
document.getElementById("removeI").style.display = "none";
});
}
function callRemove() {
document.getElementById("setI").style.display = "none";
document.getElementById("removeI").style.display = "block";
}
function setImg() {
let e = document.getElementById("imgselect");
let value = e.options[e.selectedIndex].value;
imgEditting.src = value;
$("#closeMyModal").click();
}
function insertSnippet() {
let e = document.getElementById("snippet-select");
let snippetPath = e.options[e.selectedIndex].value;
const formData = new FormData();
formData.append("task", "get-snippet");
formData.append("_token", "'.csrf_token().'");
formData.append("snippet_file", snippetPath);
fetch("admin.php", {
method: "POST",
body: formData,
})
.then(response => response.text())
.then(response => {
pasteHtmlAtCaret(response)
});
addListeners()
}
function insertImg() {
pasteHtmlAtCaret("<img src=\'\' alt=\'click to select picture\'>")
addListeners()
}
function pasteHtmlAtCaret(html) {
var sel, range;
if (window.getSelection) {
// IE9 and non-IE
sel = window.getSelection();
if (sel.getRangeAt && sel.rangeCount) {
range = sel.getRangeAt(0);
range.deleteContents();
// Range.createContextualFragment() would be useful here but is
// only relatively recently standardized and is not supported in
// some browsers (IE9, for one)
var el = document.createElement("div");
el.innerHTML = html;
var frag = document.createDocumentFragment(), node, lastNode;
while ( (node = el.firstChild) ) {
lastNode = frag.appendChild(node);
}
range.insertNode(frag);
// Preserve the selection
if (lastNode) {
range = range.cloneRange();
range.setStartAfter(lastNode);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);
}
}
} else if (document.selection && document.selection.type != "Control") {
// IE < 9
document.selection.createRange().pasteHTML(html);
}
}
function setPreview() {
let e = document.getElementById("imgselect");
let value = e.options[e.selectedIndex].value;
let img = document.getElementById("previewImg");
img.src = value;
}
var modal = document.getElementById("myModal");
var span = document.getElementsByClassName("close")[0];
span.onclick = function() {
modal.style.display = "none";
}
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
<!--CMSingleEnd-->
';
// add save button, links and scripts
if (!preg_match('/(<body.*>)/Us', $content)) {
if (!preg_match('/(^.*\?>)/Us', $content)) {
$content = ''.$additionalContent.$content;
} else {
$content = preg_replace('/(^.*\?>)/Us', '$1 <!--BODYHERE-->', $content);
$content = str_replace('<!--BODYHERE-->', $additionalContent, $content);
}
} else {
$content = preg_replace('/(<body.*>)/Us', '$1'.$additionalContent, $content);
}
file_put_contents(ADMIN_CONTENT, $content);
}
/**
* replaces the things generated by the php scripts back to the initial php scripts so the file is the same as the original
*
* @param string $file
* @param string content
* @return string The new content
*/
function fillPhp($file, $content) {
$fileCont = file_get_contents($file);
preg_match_all('/<\?.*\?>/Us', $fileCont, $matches1);
for ($i=0; $i<count($matches1[0]); $i++) {
if ($i === 0 && strpos($content, '<!--CMSingle_PHP_BEGIN-->') > strpos($content, '<!--CMSingle_PHP_END-->')) {
$content = preg_replace('/^.*<!--CMSingle_PHP_END-->/Us', $matches1[0][$i], $content);
} else if ($i === count($matches1[0])-1 && !strpos($content, '<!--CMSingle_PHP_END-->') && strpos($content, '<!--CMSingle_PHP_BEGIN-->')) {
$content = preg_replace('/<!--CMSingle_PHP_BEGIN-->.*$/Us', $matches1[0][$i], $content);
} else {
// TODO when there are slahes in matches1 or other special chars, things can brake
$content = preg_replace('/(^.*)<!--CMSingle_PHP_BEGIN-->.*<!--CMSingle_PHP_END-->/Us', '$1 '.$matches1[0][$i], $content);
}
}
return $content;
}
/**
* Returns the CSRF token.
*
* @return string
*/
function csrf_token(): string {
return isset($_SESSION["csrf"]) ? $_SESSION["csrf"] : "";
}
/**
* Output CSRF field.
*
* @return void
*/
function csrf_field() {
echo '<input type="hidden" name="_token" value="' . csrf_token() . '">';
}
/**
* Gets safe path from user input
*
* @param string $path
* @return string
*/
function get_safe_path(string $path): string {
$path = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $path);
$parts = explode(DIRECTORY_SEPARATOR, $path);
$newParts = [];
foreach($parts as $part) {
if($part === "" || $part === ".")
continue;
if($part === "..")
array_pop($newParts);
else
array_push($newParts, $part);
}
return "./" . implode(DIRECTORY_SEPARATOR, $newParts);
}
function check_auth() {
// Check if CSRF token is correct
if(!in_array($_SERVER["REQUEST_METHOD"], ["GET", "HEAD"])) {
if(!isset($_POST["_token"]) || !is_string($_POST["_token"]) || !hash_equals(csrf_token(), $_POST["_token"])) {
die("wrong csrf token");
}
}
$password = "";
if (isset($_SESSION["password"])) {
$password = $_SESSION["password"];
} elseif (isset($_POST["password"]) && is_string($_POST["password"])) {
$password = $_POST["password"];
}
// check if there is a session/correct password
if(password_verify($password, PASSWORD)) {
$_SESSION["password"] = $password;
} else {
unset($_SESSION["password"]);
$_SESSION["csrf"] = base64_encode(random_bytes(50));
if(file_exists(ADMIN_CONTENT)) unlink(ADMIN_CONTENT);
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>CMSingle</title>
</head>
<body>
<?php
if(isset($_POST["password"]) || isset($_SESSION["password"])) {
echo "Invalid credentials<br>";
}
?>
<form method="post" action="admin.php">
<?php csrf_field(); ?>
<div style="margin:auto; margin-top:100px; text-align:center; width:280px; padding:20px; border:1px solid black; border-radius: 15px">
<div style="margin:auto; text-align:center; width:250px;">
<h2>CMSingle</h2>
<hr>
<b>Password: </b> <input style="width:155px" type="password" name="password"><br>
<input style="width:100%; margin:5px 0;" type="submit" value="log in">
</div>
</div>
</form>
</body>
</html>
<?php
die();
}
}
function getWebpages(){
global $excludedFiles, $currentFile;
$webpages = [];
foreach (scandir('.') as $file) {
if (!in_array($file, $excludedFiles) && (substr($file, -4) === ".php" || substr($file, -5) === ".html")) {
if ($currentFile === '' && ($file === "index.php" || $file === "index.html")) {
array_unshift($webpages, $file);
} else {
$webpages[] = $file;
}
}
}
return $webpages;
}