no message

server/app/common/service/ai/AiAssistantService.php

@@ -0,0 +1,383 @@
+<?php
+
+namespace app\common\service\ai;
+
+use app\common\model\ai\AiChatMessage;
+use app\common\model\ai\AiChatSession;
+use app\common\model\ai\AiConfig;
+use app\common\model\ai\AiLog;
+use think\facade\Cache;
+
+class AiAssistantService
+{
+    public const AI_LOG_TYPE_ASSISTANT = 7;
+    private const QWEN_BASE_URL = 'https://dashscope.aliyuncs.com/compatible-mode';
+    private const QWEN_MODEL = 'qwen3.7-plus';
+
+    public static function chat(string $message, int $userId, string $clientId, int $sessionId = 0, string $ip = ''): array
+    {
+        $message = trim(mb_substr($message, 0, 1000));
+        if ($message === '') {
+            return ['success' => false, 'error' => '请输入要咨询的问题'];
+        }
+        if ($userId <= 0 && $clientId === '') {
+            return ['success' => false, 'error' => '缺少会话标识'];
+        }
+        if (!self::checkRateLimit($userId, $clientId, $ip)) {
+            return ['success' => false, 'error' => '提问太频繁，请稍后再试'];
+        }
+
+        $session = self::resolveSession($sessionId, $userId, $clientId, $message);
+        if (!$session) {
+            return ['success' => false, 'error' => '会话不存在或无权访问'];
+        }
+
+        $history = self::historyMessages((int) $session->id);
+        $context = AiAssistantContextService::build($message, $userId, (int) $session->id);
+
+        AiChatMessage::create([
+            'session_id' => (int) $session->id,
+            'user_id' => $userId,
+            'client_id' => $clientId,
+            'role' => AiChatMessage::ROLE_USER,
+            'content' => $message,
+            'sources_json' => '[]',
+            'status' => AiChatMessage::STATUS_SUCCESS,
+            'create_time' => time(),
+            'update_time' => time(),
+        ]);
+
+        $messages = self::buildModelMessages($history, $message, $context);
+        $result = self::callAssistantModel($messages);
+
+        $status = !empty($result['success']) ? AiChatMessage::STATUS_SUCCESS : AiChatMessage::STATUS_FAILED;
+        $answer = !empty($result['success'])
+            ? trim((string) ($result['content'] ?? ''))
+            : 'AI助手暂时没有生成成功，请稍后再试。';
+        if ($answer === '') {
+            $answer = '我暂时没有找到足够的站内依据，请换个关键词再问一次。';
+        }
+
+        $assistantMessage = AiChatMessage::create([
+            'session_id' => (int) $session->id,
+            'user_id' => $userId,
+            'client_id' => $clientId,
+            'role' => AiChatMessage::ROLE_ASSISTANT,
+            'content' => $answer,
+            'sources_json' => json_encode($context['sources'] ?? [], JSON_UNESCAPED_UNICODE),
+            'model' => (string) ($result['model'] ?? 'gpt-5.5'),
+            'tokens_used' => (int) ($result['tokens'] ?? 0),
+            'cost_ms' => (int) ($result['cost_ms'] ?? 0),
+            'status' => $status,
+            'error_msg' => mb_substr((string) ($result['error'] ?? ''), 0, 500),
+            'create_time' => time(),
+            'update_time' => time(),
+        ]);
+
+        self::touchSession((int) $session->id, $message, $answer);
+        self::recordAiLog($userId, (int) $session->id, $result, $status);
+
+        if (empty($result['success'])) {
+            return ['success' => false, 'error' => 'AI助手暂时不可用，请稍后再试'];
+        }
+
+        $session = AiChatSession::findOrEmpty((int) $session->id);
+        return [
+            'success' => true,
+            'data' => [
+                'session' => self::formatSession($session->toArray()),
+                'message' => self::formatMessage($assistantMessage->toArray()),
+                'sources' => $context['sources'] ?? [],
+            ],
+        ];
+    }
+
+    public static function sessions(int $userId, string $clientId): array
+    {
+        if ($userId <= 0 && $clientId === '') {
+            return [];
+        }
+
+        $query = AiChatSession::order('last_active_time desc')->order('id desc')->limit(30);
+        self::applyOwnerWhere($query, $userId, $clientId);
+        return array_map([self::class, 'formatSession'], $query->select()->toArray());
+    }
+
+    public static function messages(int $sessionId, int $userId, string $clientId): array
+    {
+        $session = self::getOwnedSession($sessionId, $userId, $clientId);
+        if (!$session) {
+            return ['success' => false, 'error' => '会话不存在或无权访问'];
+        }
+
+        $messages = AiChatMessage::where('session_id', $sessionId)
+            ->order('id', 'asc')
+            ->limit(200)
+            ->select()
+            ->toArray();
+
+        return [
+            'success' => true,
+            'data' => [
+                'session' => self::formatSession($session->toArray()),
+                'messages' => array_map([self::class, 'formatMessage'], $messages),
+            ],
+        ];
+    }
+
+    public static function clear(int $sessionId, int $userId, string $clientId): array
+    {
+        if ($sessionId > 0) {
+            $session = self::getOwnedSession($sessionId, $userId, $clientId);
+            if (!$session) {
+                return ['success' => false, 'error' => '会话不存在或无权访问'];
+            }
+            AiChatMessage::where('session_id', $sessionId)->delete();
+            $session->delete();
+            return ['success' => true];
+        }
+
+        if ($userId <= 0 && $clientId === '') {
+            return ['success' => false, 'error' => '缺少会话标识'];
+        }
+
+        $query = AiChatSession::field('id');
+        self::applyOwnerWhere($query, $userId, $clientId);
+        $ids = $query->column('id');
+        if (!empty($ids)) {
+            AiChatMessage::whereIn('session_id', $ids)->delete();
+            AiChatSession::whereIn('id', $ids)->delete();
+        }
+
+        return ['success' => true];
+    }
+
+    private static function resolveSession(int $sessionId, int $userId, string $clientId, string $message): ?AiChatSession
+    {
+        if ($sessionId > 0) {
+            return self::getOwnedSession($sessionId, $userId, $clientId);
+        }
+
+        $now = time();
+        return AiChatSession::create([
+            'user_id' => $userId,
+            'client_id' => $clientId,
+            'title' => self::makeTitle($message),
+            'last_message' => $message,
+            'last_active_time' => $now,
+            'message_count' => 0,
+            'create_time' => $now,
+            'update_time' => $now,
+        ]);
+    }
+
+    private static function getOwnedSession(int $sessionId, int $userId, string $clientId): ?AiChatSession
+    {
+        $query = AiChatSession::where('id', $sessionId);
+        self::applyOwnerWhere($query, $userId, $clientId);
+        $session = $query->findOrEmpty();
+        return $session->isEmpty() ? null : $session;
+    }
+
+    private static function applyOwnerWhere($query, int $userId, string $clientId): void
+    {
+        if ($userId > 0) {
+            $query->where('user_id', $userId);
+            return;
+        }
+        $query->where('user_id', 0)->where('client_id', $clientId);
+    }
+
+    private static function historyMessages(int $sessionId): array
+    {
+        $limit = max(2, min(20, (int) AiConfig::getVal('assistant_history_limit', '8')));
+        $rows = AiChatMessage::where('session_id', $sessionId)
+            ->where('status', AiChatMessage::STATUS_SUCCESS)
+            ->order('id', 'desc')
+            ->limit($limit)
+            ->select()
+            ->toArray();
+        return array_reverse($rows);
+    }
+
+    private static function buildModelMessages(array $history, string $message, array $context): array
+    {
+        $messages = [
+            [
+                'role' => 'system',
+                'content' => AiConfig::getVal('assistant_system_prompt', self::defaultSystemPrompt()),
+            ],
+        ];
+
+        foreach ($history as $row) {
+            $role = $row['role'] === AiChatMessage::ROLE_ASSISTANT ? 'assistant' : 'user';
+            $content = trim((string) ($row['content'] ?? ''));
+            if ($content !== '') {
+                $messages[] = ['role' => $role, 'content' => mb_substr($content, 0, 1000)];
+            }
+        }
+
+        $messages[] = [
+            'role' => 'user',
+            'content' => "用户问题：\n{$message}\n\n站内资料与实时上下文：\n"
+                . ($context['context_text'] ?? '{}')
+                . "\n\n请按照“直接结论、依据摘要、相关内容、风险提示”的结构回答。"
+                . "如果站内资料不足，请明确说明，不要编造。彩票、赛事预测、加密行情必须提示不构成投资或购彩建议。",
+        ];
+
+        return $messages;
+    }
+
+    private static function callAssistantModel(array $messages): array
+    {
+        $client = new DeepSeekClient();
+        $optionsList = [];
+
+        $qwenOptions = self::qwenOptions();
+        if (!empty($qwenOptions['api_key'])) {
+            $optionsList[] = $qwenOptions;
+        }
+        $optionsList[] = self::defaultModelOptions();
+
+        $failedErrors = [];
+        $lastResult = ['success' => false, 'error' => 'AI助手模型服务暂时不可用', 'tokens' => 0];
+        foreach ($optionsList as $options) {
+            $result = $client->chatMessages($messages, $options);
+            if (!empty($result['success'])) {
+                return $result;
+            }
+
+            $lastResult = $result;
+            $provider = (string) ($result['provider_label'] ?? ($options['provider_label'] ?? 'AI模型'));
+            $failedErrors[] = $provider . ': ' . (string) ($result['error'] ?? '调用失败');
+        }
+
+        if (!empty($failedErrors)) {
+            $lastResult['error'] = implode(' | ', $failedErrors);
+        }
+        return $lastResult;
+    }
+
+    private static function qwenOptions(): array
+    {
+        $apiKey = trim((string) AiConfig::getVal('qwen_api_key', ''));
+        if ($apiKey === '') {
+            $apiKey = trim((string) env('DASHSCOPE_API_KEY', ''));
+        }
+        if ($apiKey === '') {
+            return [];
+        }
+
+        $baseUrl = trim((string) AiConfig::getVal('qwen_base_url', ''));
+        if ($baseUrl === '') {
+            $baseUrl = self::QWEN_BASE_URL;
+        }
+        $model = trim((string) AiConfig::getVal('qwen_model', ''));
+        if ($model === '') {
+            $model = self::QWEN_MODEL;
+        }
+
+        return self::defaultModelOptions() + [
+            'api_key' => $apiKey,
+            'base_url' => $baseUrl,
+            'model' => $model,
+            'wire_api' => 'chat',
+            'provider_label' => 'DashScope(Qwen)',
+        ];
+    }
+
+    private static function defaultModelOptions(): array
+    {
+        return [
+            'max_tokens' => 1600,
+            'temperature' => 0.45,
+        ];
+    }
+
+    private static function checkRateLimit(int $userId, string $clientId, string $ip): bool
+    {
+        $limit = max(1, (int) AiConfig::getVal('assistant_rate_limit_per_minute', '10'));
+        $identity = $userId > 0 ? 'u' . $userId : 'c' . md5($clientId . '|' . $ip);
+        $key = 'assistant_rate_' . $identity . '_' . date('YmdHi');
+        $count = (int) Cache::get($key);
+        if ($count >= $limit) {
+            return false;
+        }
+        Cache::set($key, $count + 1, 70);
+        return true;
+    }
+
+    private static function touchSession(int $sessionId, string $question, string $answer): void
+    {
+        AiChatSession::where('id', $sessionId)->update([
+            'last_message' => mb_substr($question, 0, 500),
+            'last_answer' => mb_substr($answer, 0, 500),
+            'last_active_time' => time(),
+            'message_count' => AiChatMessage::where('session_id', $sessionId)->count(),
+            'update_time' => time(),
+        ]);
+    }
+
+    private static function recordAiLog(int $userId, int $sessionId, array $result, int $status): void
+    {
+        AiLog::create([
+            'user_id' => $userId,
+            'type' => self::AI_LOG_TYPE_ASSISTANT,
+            'ref_id' => $sessionId,
+            'tokens_used' => (int) ($result['tokens'] ?? 0),
+            'cost_ms' => (int) ($result['cost_ms'] ?? 0),
+            'status' => $status === AiChatMessage::STATUS_SUCCESS ? 1 : 2,
+            'create_time' => time(),
+        ]);
+    }
+
+    private static function formatSession(array $row): array
+    {
+        return [
+            'id' => (int) ($row['id'] ?? 0),
+            'title' => (string) ($row['title'] ?? ''),
+            'last_message' => (string) ($row['last_message'] ?? ''),
+            'last_answer' => (string) ($row['last_answer'] ?? ''),
+            'message_count' => (int) ($row['message_count'] ?? 0),
+            'last_active_time' => self::formatTime($row['last_active_time'] ?? 0),
+            'create_time' => self::formatTime($row['create_time'] ?? 0),
+        ];
+    }
+
+    private static function formatMessage(array $row): array
+    {
+        $sources = json_decode((string) ($row['sources_json'] ?? '[]'), true);
+        return [
+            'id' => (int) ($row['id'] ?? 0),
+            'session_id' => (int) ($row['session_id'] ?? 0),
+            'role' => (string) ($row['role'] ?? ''),
+            'content' => (string) ($row['content'] ?? ''),
+            'sources' => is_array($sources) ? $sources : [],
+            'status' => (int) ($row['status'] ?? 1),
+            'error_msg' => (string) ($row['error_msg'] ?? ''),
+            'create_time' => self::formatTime($row['create_time'] ?? 0),
+        ];
+    }
+
+    private static function formatTime($value): string
+    {
+        if (is_numeric($value) && (int) $value > 0) {
+            return date('Y-m-d H:i:s', (int) $value);
+        }
+        return (string) ($value ?: '');
+    }
+
+    private static function makeTitle(string $message): string
+    {
+        $title = trim(preg_replace('/\s+/u', ' ', $message) ?: '');
+        return mb_substr($title ?: '新的对话', 0, 24);
+    }
+
+    private static function defaultSystemPrompt(): string
+    {
+        return '你是世博头条 AI 助手，面向普通用户回答站内体育资讯、赛事、社区、彩票和加密行情相关问题。'
+            . '必须优先依据提供的站内资料和实时上下文回答；资料不足时要直接说明不足并建议用户换关键词。'
+            . '不要声称可以访问后台、源码、服务器或未提供的内部数据。'
+            . '回答使用中文，结构清晰，语气专业克制。涉及赛事预测、彩票或加密行情时，必须说明仅供参考，不构成投资或购彩建议。';
+    }
+}