package org.ruoyi.chat.service.chat.impl;
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import cn.dev33.satoken.stp.StpUtil;
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import cn.hutool.core.collection.CollectionUtil;
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import com.google.protobuf.ServiceException;
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import jakarta.servlet.http.HttpServletRequest;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import okhttp3.ResponseBody;
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import org.ruoyi.chat.enums.ChatModeType;
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import org.ruoyi.chat.service.chat.IChatCostService;
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import org.ruoyi.chat.service.chat.ISseService;
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import org.ruoyi.chat.util.IpUtil;
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import org.ruoyi.chat.util.SSEUtil;
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import org.ruoyi.common.chat.config.LocalCache;
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import org.ruoyi.common.chat.entity.Tts.TextToSpeech;
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import org.ruoyi.common.chat.entity.chat.Message;
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import org.ruoyi.common.chat.entity.files.UploadFileResponse;
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import org.ruoyi.common.chat.entity.whisper.WhisperResponse;
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import org.ruoyi.common.chat.openai.OpenAiStreamClient;
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import org.ruoyi.common.chat.request.ChatRequest;
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import org.ruoyi.common.core.utils.DateUtils;
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import org.ruoyi.common.core.utils.StringUtils;
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import org.ruoyi.common.core.utils.file.FileUtils;
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import org.ruoyi.common.core.utils.file.MimeTypeUtils;
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import org.ruoyi.common.redis.utils.RedisUtils;
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import org.ruoyi.domain.bo.ChatSessionBo;
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import org.ruoyi.domain.vo.ChatModelVo;
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import org.ruoyi.service.VectorStoreService;
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import org.ruoyi.service.IChatModelService;
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import org.ruoyi.service.IChatSessionService;
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import org.springframework.core.io.InputStreamResource;
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import org.springframework.core.io.Resource;
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import org.springframework.http.MediaType;
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import org.springframework.http.ResponseEntity;
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import org.springframework.stereotype.Service;
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import org.springframework.web.multipart.MultipartFile;
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import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.time.Duration;
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import java.util.ArrayList;
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import java.util.List;
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@Service
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@Slf4j
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@RequiredArgsConstructor
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public class SseServiceImpl implements ISseService {
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private final OpenAiStreamClient openAiStreamClient;
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private final VectorStoreService vectorStoreService;
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private final IChatCostService chatCostService;
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private final IChatModelService chatModelService;
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private final OpenAIServiceImpl openAIService;
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private final OllamaServiceImpl ollamaService;
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private final IChatSessionService chatSessionService;
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private ChatModelVo chatModelVo;
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@Override
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public SseEmitter sseChat(ChatRequest chatRequest, HttpServletRequest request) {
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SseEmitter sseEmitter = new SseEmitter(0L);
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try {
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// 构建消息列表
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buildChatMessageList(chatRequest);
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if (!StpUtil.isLogin()) {
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// 未登录用户限制对话次数
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checkUnauthenticatedUserChatLimit(request);
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}else {
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LocalCache.CACHE.put("userId", chatCostService.getUserId());
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chatRequest.setUserId(chatCostService.getUserId());
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// 保存会话信息
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if(chatRequest.getSessionId()==null){
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ChatSessionBo chatSessionBo = new ChatSessionBo();
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chatSessionBo.setUserId(chatCostService.getUserId());
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chatSessionBo.setSessionTitle(getFirst10Characters(chatRequest.getPrompt()));
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chatSessionBo.setSessionContent(chatRequest.getPrompt());
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chatSessionService.insertByBo(chatSessionBo);
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chatRequest.setSessionId(chatSessionBo.getId());
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}
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// 保存消息记录 并扣除费用
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chatCostService.deductToken(chatRequest);
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}
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// 根据模型分类调用不同的处理逻辑
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switchModelAndHandle(chatRequest,sseEmitter);
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} catch (Exception e) {
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log.error(e.getMessage(),e);
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SSEUtil.sendErrorEvent(sseEmitter,e.getMessage());
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}
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return sseEmitter;
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}
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/**
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* 获取对话标题
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*
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* @param str 原字符
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* @return 截取后的字符
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*/
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public static String getFirst10Characters(String str) {
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// 判断字符串长度
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if (str.length() > 10) {
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// 如果长度大于10，截取前10个字符
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return str.substring(0, 10);
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} else {
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// 如果长度不足10，返回整个字符串
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return str;
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}
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}
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/**
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* 检查未登录用户是否超过当日对话次数限制
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*
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* @param request 当前请求
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* @throws ServiceException 如果当日免费次数已用完
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*/
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public void checkUnauthenticatedUserChatLimit(HttpServletRequest request) throws ServiceException {
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String clientIp = IpUtil.getClientIp(request);
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// 访客每天默认只能对话5次
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int timeWindowInSeconds = 5;
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String redisKey = "clientIp:" + clientIp;
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int count = 0;
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// 检查Redis中的对话次数
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if (RedisUtils.getCacheObject(redisKey) == null) {
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// 缓存有效时间1天
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RedisUtils.setCacheObject(redisKey, count, Duration.ofSeconds(86400));
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} else {
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count = RedisUtils.getCacheObject(redisKey);
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if (count >= timeWindowInSeconds) {
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throw new ServiceException("当日免费次数已用完");
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}
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count++;
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RedisUtils.setCacheObject(redisKey, count);
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}
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}
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/**
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* 根据模型名称前缀调用不同的处理逻辑
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*/
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private void switchModelAndHandle(ChatRequest chatRequest,SseEmitter emitter) {
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// 调用ollama中部署的本地模型
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if (ChatModeType.OLLAMA.getCode().equals(chatModelVo.getCategory())) {
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ollamaService.chat(chatRequest,emitter);
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} else {
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openAIService.chat(chatRequest,emitter);
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}
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}
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/**
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* 构建消息列表
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*/
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private void buildChatMessageList(ChatRequest chatRequest){
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chatModelVo = chatModelService.selectModelByName(chatRequest.getModel());
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// 获取对话消息列表
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List<Message> messages = chatRequest.getMessages();
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String sysPrompt = chatModelVo.getSystemPrompt();
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if(StringUtils.isEmpty(sysPrompt)){
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sysPrompt ="你是一个由RuoYI-AI开发的人工智能助手，名字叫熊猫助手。你擅长中英文对话，能够理解并处理各种问题，提供安全、有帮助、准确的回答。" +
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"当前时间："+ DateUtils.getDate()+
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"#注意：回复之前注意结合上下文和工具返回内容进行回复。";
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}
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// 设置系统默认提示词
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Message sysMessage = Message.builder().content(sysPrompt).role(Message.Role.SYSTEM).build();
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messages.add(0,sysMessage);
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chatRequest.setSysPrompt(sysPrompt);
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// 查询向量库相关信息加入到上下文
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if(StringUtils.isNotEmpty(chatRequest.getKid())){
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List<Message> knMessages = new ArrayList<>();
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String content = messages.get(messages.size() - 1).getContent().toString();
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List<String> nearestList = vectorStoreService.getQueryVector(content, chatRequest.getKid());
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for (String prompt : nearestList) {
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Message userMessage = Message.builder().content(prompt).role(Message.Role.USER).build();
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knMessages.add(userMessage);
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}
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Message userMessage = Message.builder().content(content + (!nearestList.isEmpty() ? "\n\n注意：回答问题时，须严格根据我给你的系统上下文内容原文进行回答，请不要自己发挥,回答时保持原来文本的段落层级" : "")).role(Message.Role.USER).build();
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knMessages.add(userMessage);
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messages.addAll(knMessages);
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}
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// 用户对话内容
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String chatString = null;
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// 获取用户对话信息
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Object content = messages.get(messages.size() - 1).getContent();
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if (content instanceof List<?> listContent) {
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if (CollectionUtil.isNotEmpty(listContent)) {
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chatString = listContent.get(0).toString();
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}
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} else if (content instanceof String) {
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chatString = (String) content;
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}
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// 设置对话信息
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chatRequest.setPrompt(chatString);
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}
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/**
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* 文字转语音
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*/
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@Override
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public ResponseEntity<Resource> textToSpeed(TextToSpeech textToSpeech) {
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ResponseBody body = openAiStreamClient.textToSpeech(textToSpeech);
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if (body != null) {
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// 将ResponseBody转换为InputStreamResource
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InputStreamResource resource = new InputStreamResource(body.byteStream());
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// 创建并返回ResponseEntity
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return ResponseEntity.ok()
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.contentType(MediaType.parseMediaType("audio/mpeg"))
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.body(resource);
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} else {
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// 如果ResponseBody为空，返回404状态码
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return ResponseEntity.notFound().build();
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}
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}
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/**
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* 语音转文字
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*/
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@Override
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public WhisperResponse speechToTextTranscriptionsV2(MultipartFile file) {
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// 确保文件不为空
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if (file.isEmpty()) {
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throw new IllegalStateException("Cannot convert an empty MultipartFile");
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}
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if (!FileUtils.isValidFileExtention(file, MimeTypeUtils.AUDIO__EXTENSION)) {
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throw new IllegalStateException("File Extention not supported");
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}
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// 创建一个文件对象
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File fileA = new File(System.getProperty("java.io.tmpdir") + File.separator + file.getOriginalFilename());
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try {
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// 将 MultipartFile 的内容写入文件
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file.transferTo(fileA);
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} catch (IOException e) {
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throw new RuntimeException("Failed to convert MultipartFile to File", e);
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}
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return openAiStreamClient.speechToTextTranscriptions(fileA);
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}
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@Override
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public UploadFileResponse upload(MultipartFile file) {
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if (file.isEmpty()) {
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throw new IllegalStateException("Cannot upload an empty MultipartFile");
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}
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if (!FileUtils.isValidFileExtention(file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION)) {
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throw new IllegalStateException("File Extention not supported");
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}
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return openAiStreamClient.uploadFile("fine-tune", convertMultiPartToFile(file));
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}
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private File convertMultiPartToFile(MultipartFile multipartFile) {
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File file = null;
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try {
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// 获取原始文件名
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String originalFileName = multipartFile.getOriginalFilename();
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// 默认扩展名
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String extension = ".tmp";
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// 尝试从原始文件名中获取扩展名
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if (originalFileName != null && originalFileName.contains(".")) {
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extension = originalFileName.substring(originalFileName.lastIndexOf("."));
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}
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// 使用原始文件的扩展名创建临时文件
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Path tempFile = Files.createTempFile(null, extension);
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file = tempFile.toFile();
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// 将MultipartFile的内容写入文件
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try (InputStream inputStream = multipartFile.getInputStream();
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FileOutputStream outputStream = new FileOutputStream(file)) {
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int read;
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byte[] bytes = new byte[1024];
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while ((read = inputStream.read(bytes)) != -1) {
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outputStream.write(bytes, 0, read);
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}
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} catch (IOException e) {
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// 处理文件写入异常
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e.printStackTrace();
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}
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} catch (IOException e) {
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// 处理临时文件创建异常
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e.printStackTrace();
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}
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return file;
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}
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}
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