<?php
declare(strict_types=1);
session_start();

if (empty($_SESSION['miter'])) {
header('Location: ../../index.php');
exit;
}

// delete file + entry
$panel_del = $_POST["panel_edit_name"] ?? '';
$panel_name = preg_replace('/[^a-zA-Z0-9_-]/', '', substr($panel_del, 1));

if ($panel_name !== '') {
$txt_file = "../../panels/{$panel_name}.txt";
if (file_exists($txt_file)) {
unlink($txt_file);
}
}

// get title
$panel_title = $_POST["title"] ?? '';

// replace file name space
$title_to_file = str_replace(' ', '_', $panel_title);

$title_to_file = preg_replace('/[<>\:"\/\\\\\|\?\*\'#]/', '_', $title_to_file);
$title_to_file = str_replace(['..', "\0"], '_', $title_to_file);

if ($title_to_file !== $panel_name) {
// remove line from user/panels.txt
$panel_dir = '../../user/panels.txt';
if (file_exists($panel_dir)) {
$panel_data = array_map('trim', file($panel_dir));
foreach($panel_data as $panel_key => $panel_line) {
if($panel_line === $panel_del) {
unset($panel_data[$panel_key]);
}
}

$new_content = empty($panel_data) ? '' : implode("\n", $panel_data) . "\n";
file_put_contents($panel_dir, $new_content, LOCK_EX);
}
}

// get post
$panel_post = $_POST["panel"] ?? '';
// get file name
$panel_file = "../../panels/{$title_to_file}.txt";

// errors
include '../admin/otc.php';
$log_file = __DIR__ . '/../admin/log.txt'; 

function log_custom_error(string $message, string $log_file, string $o_date): void {
error_log("{$o_date} -- {$message}" . PHP_EOL, 3, $log_file);
}

if (empty($title_to_file)) { 
log_custom_error("Error: File path is empty.", $log_file, $o_date ?? '');
exit;
}

$panel_fold = dirname($panel_file);
if (!is_dir($panel_fold)) { 
log_custom_error("Error: Dir {$panel_fold} does not exist.", $log_file, $o_date ?? '');
exit; 
}
if (!is_writable($panel_fold)) { 
log_custom_error("Error: Dir {$panel_fold} is not writable.", $log_file, $o_date ?? '');
exit; 
}

// write file
try {
$write_result = file_put_contents($panel_file, $panel_post, LOCK_EX);
if ($write_result === false) { 
throw new Exception("Failed to open stream."); 
}
} catch (\Throwable $e) { 
log_custom_error("Exception: " . $e->getMessage(), $log_file, $o_date ?? '');
}

// write to user/panel
if ($title_to_file !== $panel_name) {
// get hide title
// 1 = Show 2 = Hide
if(isset($_POST["hidetitle"]) && $_POST["hidetitle"] === 'yes') {
$hide_title = '2';
} else {
$hide_title = '1';
}	
// create new entry
$panel_insert = $hide_title . "" . $title_to_file;
// update user/panels.txt
file_put_contents("../../user/panels.txt", "\n" . $panel_insert, FILE_APPEND | LOCK_EX);
}

header("Location: ../../index.php?user=panels");
exit;