<?php
require_once('./include/db_info.inc.php');
require_once('./include/setlang.php');
require_once('./include/const.inc.php');

$docs_dir = __DIR__ . '/doc';
$doc_entries = array();

if (is_dir($docs_dir)) {
    $doc_files = glob($docs_dir . '/*.md');
    if ($doc_files !== false) {
        sort($doc_files, SORT_NATURAL | SORT_FLAG_CASE);
        foreach ($doc_files as $doc_file) {
            $doc_entries[] = array(
                'file' => basename($doc_file),
                'title' => preg_replace('/\.md$/i', '', basename($doc_file))
            );
        }
    }
}

$selected_file = '';
if (isset($_GET['file'])) {
    $selected_file = basename($_GET['file']);
}

if (empty($selected_file) && !empty($doc_entries)) {
    $selected_file = $doc_entries[0]['file'];
}

$selected_title = '文档';
$selected_markdown = '';

if (!empty($selected_file)) {
    $selected_path = realpath($docs_dir . DIRECTORY_SEPARATOR . $selected_file);
    $docs_root = realpath($docs_dir);

    if (
        $selected_path !== false &&
        $docs_root !== false &&
        strpos($selected_path, $docs_root . DIRECTORY_SEPARATOR) === 0 &&
        is_file($selected_path) &&
        preg_match('/\.md$/i', $selected_path)
    ) {
        $selected_markdown = file_get_contents($selected_path);
        if ($selected_markdown === false) {
            $selected_markdown = '';
        } else {
            $selected_markdown = preg_replace('/^\xEF\xBB\xBF/', '', $selected_markdown);
        }
        $selected_title = preg_replace('/\.md$/i', '', basename($selected_path));
    }
}

$show_title = $selected_title . ' - ' . $OJ_NAME;

require('template/' . $OJ_TEMPLATE . '/docs.php');
?>