评论系统

// config/comment.php
return [
    // 是否开启评论
    'enable' => true,

    // 评论审核
    'need_audit' => true,

    // 允许匿名评论
    'allow_guest' => true,

    // 嵌套层级
    'max_depth' => 5,

    // 评论长度
    'min_length' => 10,
    'max_length' => 500,

    // 验证码
    'need_captcha' => true,
];

// 自动审核规则
'auto_audit' => [
    // 注册用户自动通过
    'registered_user' => true,

    // 历史无违规用户
    'trusted_user' => true,

    // 无敏感词自动通过
    'no_sensitive' => true,
],

// config/sensitive_words.php
return [
    '敏感词1',
    '敏感词2',
    '广告词',
    // ...
];

// 检测敏感词
public function checkSensitiveWords($content)
{
    $words = config('sensitive_words');

    foreach ($words as $word) {
        if (stripos($content, $word) !== false) {
            return true;
        }
    }

    return false;
}

// 替换敏感词
public function replaceSensitiveWords($content)
{
    $words = config('sensitive_words');

    foreach ($words as $word) {
        $content = str_ireplace($word, '***', $content);
    }

    return $content;
}

public function isBlacklisted($ip)
{
    $blacklist = IPBlacklist::where('ip', $ip)
        ->where('expire_time', '>', date('Y-m-d H:i:s'))
        ->find();

    return $blacklist !== null;
}

'rate_limit' => [
    // 同一用户间隔时间（秒）
    'user_interval' => 60,

    // 同一IP间隔时间（秒）
    'ip_interval' => 30,

    // 每天最多评论次数
    'daily_limit' => 50,
],

public function checkRateLimit($userId, $ip)
{
    $cacheKey = 'comment_limit_' . $userId;
    $lastTime = Cache::get($cacheKey);

    if ($lastTime && time() - $lastTime < 60) {
        throw new \Exception('评论太频繁，请稍后再试');
    }

    Cache::set($cacheKey, time(), 3600);
}

'need_captcha' => true,
'captcha_type' => 'image', // image, sms, slider

public function verifyCaptcha($captcha)
{
    $sessionCaptcha = session('captcha');

    if (empty($captcha) || strtolower($captcha) !== strtolower($sessionCaptcha)) {
        throw new \Exception('验证码错误');
    }

    // 验证通过后清除
    session('captcha', null);

    return true;
}

// 有新评论时通知文章作者
public function notifyAuthor($comment, $article)
{
    $author = $article->author;

    if ($author->email) {
        Mail::send('mail/new_comment', [
            'author' => $author,
            'article' => $article,
            'comment' => $comment
        ], function($message) use ($author) {
            $message->to($author->email)
                ->subject('您的文章有新评论');
        });
    }
}

// 回复评论时通知原评论者
public function notifyReply($reply, $parent)
{
    if ($parent->user->email) {
        Mail::send('mail/comment_reply', [
            'user' => $parent->user,
            'reply' => $reply
        ], function($message) use ($parent) {
            $message->to($parent->user->email)
                ->subject('您的评论收到回复');
        });
    }
}

// 创建站内消息
Notification::create([
    'user_id' => $article->user_id,
    'type' => 'new_comment',
    'title' => '您的文章收到新评论',
    'content' => $comment->content,
    'link' => '/article/' . $article->id . '#comment-' . $comment->id,
    'is_read' => 0,
]);

// 获取文章评论数
$commentCount = Comment::where('article_id', $articleId)
    ->where('status', 1)
    ->count();

// 更新文章评论数
Article::where('id', $articleId)
    ->update(['comment_count' => $commentCount]);

// 用户总评论数
$userCommentCount = Comment::where('user_id', $userId)
    ->where('status', 1)
    ->count();

// 用户今日评论数
$todayCount = Comment::where('user_id', $userId)
    ->whereDay('create_time', 'today')
    ->count();

// 获取点赞最多的评论
$hotComments = Comment::where('status', 1)
    ->order('like_count', 'desc')
    ->limit(10)
    ->select();