<?php
require_once '../startup.php';

include_once '_category.php';
include_once '_user.php';
include_once '_topics.php';
include_once '_posts.php';

if(!session_active()) {
    header('Location: /login?m=forbidden');
    return;
}

$userInfo = user_info(current_user_id());

$categoryId = isset($_GET['cat']) && is_string($_GET['cat']) && ctype_digit($_GET['cat']) ? (int)$_GET['cat'] : 0;
$topicId = isset($_GET['topic']) && is_string($_GET['topic']) && ctype_digit($_GET['topic']) ? (int)$_GET['topic'] : 0;
$postId = isset($_GET['post']) && is_string($_GET['post']) && ctype_digit($_GET['post']) ? (int)$_GET['post'] : 0;

if($postId > 0) {
    $postInfo = post_info($postId);

    if(empty($postInfo))
        die_ex('Post not found.', 404);
    if($postInfo['post_type'] != FMF_POST_TYPE_MESSAGE)
        die_ex('This is not a message.', 400);
    if(!$userInfo['user_moderator'] && $userInfo['user_id'] != $postInfo['user_id'])
        die_ex('You aren\'t allowed to edit this post.', 403);

    $categoryId = $postInfo['cat_id'] ?? 0;
    $topicId = $postInfo['topic_id'] ?? 0;
    $postId = $postInfo['post_id'] ?? 0;
    $postText = $postInfo['post_text'] ?? '';
} else {
    $postId = 0;
}

if($topicId > 0) {
    $topicInfo = topic_info($topicId);
    
    if(empty($topicInfo))
        die_ex('Topic not found.', 404);

    $categoryId = $topicInfo['cat_id'] ?? 0;
    $topicId = $topicInfo['topic_id'] ?? 0;
} else {
    $topicId = 0;
}

$categoryInfo = category_info($categoryId);

if(empty($categoryInfo)) {
    die_ex('Category does not exist.', 404);
}

if($categoryInfo['cat_type'] != 0) {
    die_ex('This category cannot hold topics.');
}

if(isset($topicInfo)) {
    if(!empty($topicInfo['topic_locked']) && !$userInfo['user_moderator']) {
        die_ex('You may not respond to locked topics.', 403);
    }
}

$title = isset($topicInfo) ? ((isset($postInfo) ? 'Editing reply to ' : 'Replying to ') . $topicInfo['topic_title']) : ('Creating a topic in ' . $categoryInfo['cat_name']);

if(isset($_POST['text']) && CSRF::verify()) {
    $postTitle = isset($_POST['title']) && is_string($_POST['title']) ? $_POST['title'] : '';
    $postText = trim(is_string($_POST['text']) ? $_POST['text'] : '');

    $postLen = mb_strlen($postText);

    if($postLen < 10) {
        $error = 'Post content must be longer than 10 characters.';
    } elseif($postLen > 50000) {
        $error = 'Post content may not be longer than 50000 characters.';
    } else {
        if(!isset($topicInfo)) {
            $titleLen = mb_strlen($postTitle);

            if($titleLen < 5) {
                $error = 'Topic titles must be longer than 5 characters.';
            } elseif($titleLen > 100) {
                $error = 'Topic titles may not be longer than 100 characters.';
            } else {
                $topicId = create_topic($categoryInfo['cat_id'], current_user_id(), $postTitle);

                if($topicId < 1) {
                    $error = 'Failed to create topic.';
                } else {
                    $topicInfo = topic_info($topicId);
                    $satoriMsg = "[b]forum.flash.moe[/b]: [url=https://forum.flash.moe/user/{$userInfo['user_id']}][b]{$userInfo['user_login']}[/b][/url] created topic [url=https://forum.flash.moe/topic/{$topicId}][b]{$topicInfo['topic_title']}[/b][/url]";
                }
            }
        }

        if(!isset($error) && !isset($message)) {
            if(isset($postInfo)) {
                post_update($postInfo['post_id'], $postText);
            } else {
                $postId = create_post($categoryInfo['cat_id'], $topicInfo['topic_id'], current_user_id(), $postText);
                topic_bump($topicInfo['topic_id'], $postId, !empty($topicInfo['topic_resolved']));
                category_bump($categoryInfo['cat_id'], $postId, isset($titleLen));

                if(!isset($satoriMsg))
                    $satoriMsg = "[b]forum.flash.moe[/b]: [url=https://forum.flash.moe/user/{$userInfo['user_id']}][b]{$userInfo['user_login']}[/b][/url] replied to [url=https://forum.flash.moe/post/{$postId}][b]{$topicInfo['topic_title']}[/b][/url]";
            }

            if(defined('SATORI_SECRET') && !empty($satoriMsg)) {
                $sock = @fsockopen(SATORI_HOST, SATORI_PORT, $errno, $errstr, 2);

                if($sock) {
                    fwrite($sock, chr(0xF) . hash_hmac('sha256', $satoriMsg, SATORI_SECRET) . $satoriMsg . chr(0xF));
                    fflush($sock);
                    fclose($sock);
                }
            }

            $postUrl = isset($titleLen) ? "/topic/{$topicInfo['topic_id']}" : "/post/{$postId}";
            header("Location: {$postUrl}");
            return;
        }
    }
}

include FMF_LAYOUT . '/header.php';

$breadcrumbs = category_breadcrumbs($categoryInfo['cat_id'], empty($topicInfo));
echo '<a href="/">forum.flash.moe</a> &raquo; ';
foreach($breadcrumbs as $breadcrumb)
    printf('<a href="/category/%d">%s</a> &raquo; ', $breadcrumb['cat_id'], $breadcrumb['cat_name']);
echo '<h3><a href="' . (empty($topicInfo) ? ('/category/' . $categoryInfo['cat_id']) : ('/topic/' . $topicInfo['topic_id'])) . '">' . ($topicInfo['topic_title'] ?? $categoryInfo['cat_name']) . '</a></h3>';
?>
<form class="posting-form" method="post" action="">
    <?=CSRF::html();?>

    <?php if(isset($error) || isset($message)) { ?>
    <div class="posting-message<?php if(isset($error)) { echo ' posting-message-error'; }?>"><?=($error ?? $message);?></div>
    <?php } ?>

    <div class="posting-header">
        <input type="text" <?php if(empty($topicInfo)) { ?>value="<?=htmlentities($postTitle ?? '');?>" name="title" class="posting-title" tabindex="1"<?php } else { ?>value="Re: <?=$topicInfo['topic_title'];?>" class="posting-title posting-title-disabled" disabled readonly<?php } ?>/>
        <input type="submit" value="<?=(empty($postInfo) ? (empty($topicInfo) ? 'Post' : 'Reply') : 'Edit');?>" class="posting-submit" tabindex="3"/>
    </div>

    <textarea name="text" class="posting-text" tabindex="2"><?=htmlentities($postText ?? '');?></textarea>
    <a href="https://guides.github.com/features/mastering-markdown/" style="font-size: .9em;" target="_blank" rel="noopener">Markdown supported</a>
</form>
<?php
include FMF_LAYOUT . '/footer.php';