AI 内容生成

// 批量生成
$topics = [
    '人工智能的发展趋势',
    '云计算在企业中的应用',
    '区块链技术解析',
];

foreach ($topics as $topic) {
    Queue::push('app\job\AIGenerate', [
        'type' => 'article',
        'topic' => $topic,
        'length' => 1000,
    ]);
}

// 每天定时生成一篇文章
class DailyArticle
{
    public function generate()
    {
        $topics = [
            '今日科技要闻',
            '行业动态分析',
        ];

        $topic = $topics[array_rand($topics)];

        $ai = new AIService();
        $content = $ai->generate([
            'prompt' => "写一篇关于{$topic}的文章",
            'length' => 800,
        ]);

        Article::create([
            'title' => $this->extractTitle($content),
            'content' => $content,
            'status' => 'draft', // 保存为草稿
        ]);
    }
}

class ContentReview
{
    public function review($content)
    {
        $issues = [];

        // 检查敏感词
        if ($this->hasSensitiveWords($content)) {
            $issues[] = '包含敏感词';
        }

        // 检查原创度
        $similarity = $this->checkSimilarity($content);
        if ($similarity > 0.8) {
            $issues[] = '原创度过低';
        }

        // 检查可读性
        $readability = $this->checkReadability($content);
        if ($readability < 60) {
            $issues[] = '可读性较差';
        }

        return [
            'passed' => empty($issues),
            'issues' => $issues,
        ];
    }
}

// 生成多个版本供选择
$versions = [];

for ($i = 0; $i < 3; $i++) {
    $content = $ai->generate([
        'prompt' => $prompt,
        'temperature' => 0.7 + ($i * 0.1),
    ]);

    $versions[] = [
        'content' => $content,
        'score' => $this->scoreContent($content),
    ];
}

// 按评分排序
usort($versions, function($a, $b) {
    return $b['score'] - $a['score'];
});

return $versions;

class AIController
{
    public function generate()
    {
        $prompt = request()->post('prompt');
        $params = request()->post('params', []);

        $ai = new AIService();
        $content = $ai->generate([
            'prompt' => $prompt,
            'max_tokens' => $params['length'] ?? 1000,
            'temperature' => $params['temperature'] ?? 0.7,
        ]);

        return json([
            'code' => 200,
            'data' => ['content' => $content],
        ]);
    }

    public function stream()
    {
        header('Content-Type: text/event-stream');
        header('Cache-Control: no-cache');

        $prompt = request()->param('prompt');

        $ai = new AIService();
        $ai->generateStream($prompt, function($text) {
            echo "data: " . json_encode([
                'type' => 'content',
                'text' => $text,
            ]) . "\n\n";
            ob_flush();
            flush();
        });

        echo "data: " . json_encode(['type' => 'done']) . "\n\n";
    }
}

class AIUsageLog extends Model
{
    public static function record($data)
    {
        self::create([
            'user_id' => $data['user_id'],
            'provider' => $data['provider'],
            'model' => $data['model'],
            'prompt_tokens' => $data['prompt_tokens'],
            'completion_tokens' => $data['completion_tokens'],
            'total_tokens' => $data['total_tokens'],
            'cost' => $data['cost'],
            'create_time' => time(),
        ]);
    }
}

'quota' => [
    'daily_requests' => 100,      // 每日请求限制
    'daily_tokens' => 50000,      // 每日 Token 限制
    'monthly_cost' => 100,        // 每月费用限制（元）
],

class QuotaChecker
{
    public function check($userId)
    {
        $today = date('Y-m-d');

        $usage = AIUsageLog::where('user_id', $userId)
            ->whereTime('create_time', $today)
            ->sum('total_tokens');

        $limit = config('ai.quota.daily_tokens');

        if ($usage >= $limit) {
            throw new Exception('今日配额已用完');
        }

        return true;
    }
}

class CostAlert
{
    public function check()
    {
        $monthCost = AIUsageLog::whereTime('create_time', 'month')
            ->sum('cost');

        $threshold = config('ai.quota.monthly_cost') * 0.8;

        if ($monthCost >= $threshold) {
            // 发送告警
            Queue::push('app\job\SendEmail', [
                'email' => config('app.admin_email'),
                'subject' => 'AI 费用告警',
                'content' => "本月 AI 费用已达 {$monthCost} 元",
            ]);
        }
    }
}