eta_api/services/llm/facade/llm_service.go

package facade

import (
	"encoding/json"
	"errors"
	"eta/eta_api/models/rag"
	localService "eta/eta_api/services/llm"
	"eta/eta_api/services/llm/facade/bus_response"
	"eta/eta_api/utils"
	"eta/eta_api/utils/llm"
	"eta/eta_api/utils/llm/eta_llm/eta_llm_http"
	"eta/eta_api/utils/ws"
	"fmt"
	"github.com/gorilla/websocket"
	"github.com/rdlucklib/rdluck_tools/uuid"
	"gorm.io/gorm"
	"os"
	"strings"
	"time"
)

var (
	llmService, _ = llm.GetInstance(llm.ETA_LLM_CLIENT)
)

func generateSessionCode() (code string) {
	return fmt.Sprintf("%s%s", "llm_session_", uuid.NewUUID().Hex32())
}

// AddSession 创建会话session
func AddSession(userId int, conn *websocket.Conn) {
	sessionId := generateSessionCode()
	session := ws.NewSession(userId, sessionId, conn)
	ws.Manager().AddSession(session)
}

// LLMKnowledgeBaseSearchDocs 搜索知识库
func LLMKnowledgeBaseSearchDocs(search LLMKnowledgeSearch) (resp bus_response.SearchDocsEtaResponse, err error) {
	docs, err := llmService.SearchKbDocs(search.Query, search.KnowledgeBaseName)
	if err != nil {
		return
	}
	for _, doc := range docs.([]eta_llm_http.SearchDocsResponse) {
		resp.Content = resp.Content + doc.PageContent
	}
	resp.Docs = docs.([]eta_llm_http.SearchDocsResponse)
	return
}

// AIGCBaseOnPromote aigc 生成内容
func AIGCBaseOnPromote(aigc AIGC) (resp bus_response.AIGCEtaResponse, err error) {
	mapping, queryErr := rag.GetArticleKbMapping(aigc.ArticleId)
	if queryErr != nil && !errors.Is(queryErr, gorm.ErrRecordNotFound) {
		utils.FileLog.Error("获取文章知识库信息失败,err: %v", queryErr)
		err = fmt.Errorf("获取文章知识库信息失败,err: %v", queryErr)
		return
	} else {
		var kbId string
		var file *os.File
		if mapping.Id == 0 || mapping.KbId == "" {
			article, fileErr := rag.GetArticleById(aigc.ArticleId)
			if fileErr != nil {
				// 找不到就处理失败
				utils.FileLog.Error("公众号文章不存在")
				err = fmt.Errorf("公众号文章不存在")
				return
			}
			// 文章加入到知识库
			path, fileErr := localService.CreateArticleFile(article)
			if fileErr != nil {
				utils.FileLog.Error("创建文章文件失败,err: %v", fileErr)
				err = fmt.Errorf("创建文章文件失败,err: %v", fileErr)
				return
			}
			defer func() {
				_ = os.Remove(path)
			}()
			file, err = os.Open(path)
			if err != nil {
				utils.FileLog.Error("打开文件失败,err:", err)
				return
			}
			uploadResp, httpErr := llmService.UploadFileToTemplate([]*os.File{file}, nil)
			if httpErr != nil {
				utils.FileLog.Error("上传文件失败,err:", err.Error())
				err = fmt.Errorf("上传文件失败,err:%v", httpErr)
				return
			}
			data := uploadResp.(eta_llm_http.UploadDocsResponse)
			//保存映射关系到数据库
			if data.Id == "" {
				utils.FileLog.Error("上传文件失败,向量库Id获取失败")
				err = fmt.Errorf("上传文件失败,向量库Id获取失败")
				return
			}
			err = rag.CreateArticleKbMapping(rag.ArticleKbMapping{
				WechatArticleId: aigc.ArticleId,
				KbId:            data.Id,
				CreatedTime:     time.Now(),
			})
			if err != nil {
				utils.FileLog.Warn("创建文章知识库映射关系失败,err:", err.Error())
			}
			kbId = data.Id
		} else {
			kbId = mapping.KbId
		}
		//知识库对话
		response, httpErr := llmService.FileChat(aigc.Promote, kbId, nil)
		if httpErr != nil {
			utils.FileLog.Error("内容生成失败,err:", err.Error())
			err = fmt.Errorf("内容生成失败,err:%v", httpErr)
			return
		}

		gcResp, gcErr := dealFileChatResp(response)
		if gcErr != nil {
			utils.FileLog.Error("内容生成失败,err:%v", gcErr.Error())
			err = fmt.Errorf("内容生成失败,err:%v", gcErr)
			return
		}
		if gcResp.Code == 200 {
			resp = gcResp.Data
			return
		}
		if gcResp.Code == 404 {
			response, httpErr = llmService.FileChat(aigc.Promote, kbId, nil)
			if httpErr != nil {
				utils.FileLog.Error("内容生成失败,err:%v", httpErr.Error())
				err = fmt.Errorf("内容生成失败,err:%v", httpErr)
				return
			}
			gcResp, gcErr = dealFileChatResp(response)
			if gcErr != nil {
				utils.FileLog.Error("内容生成失败,err:%v", gcErr.Error())
				err = fmt.Errorf("内容生成失败,err:%v", gcErr)
				return
			}
			if gcResp.Code == 200 {
				resp = gcResp.Data
				return
			}
			utils.FileLog.Error("内容生成失败,err:%v", gcResp.Code, gcResp.Msg)
			err = fmt.Errorf("内容生成失败,code:%v,err:%v", gcResp.Code, gcResp.Msg)
			return
		} else {
			utils.FileLog.Error("内容生成失败,code:%v,msg:%v", gcResp.Code, gcResp.Msg)
			err = fmt.Errorf("内容生成失败,err:%v", gcResp.Msg)
			return
		}
	}
}

type LLMKnowledgeSearch struct {
	Query             string `json:"Query"`
	KnowledgeBaseName string `json:"KnowledgeBaseName"`
}

type AIGC struct {
	Promote   string
	ArticleId int
}

func dealFileChatResp(response eta_llm_http.BaseResponse) (httpResponse bus_response.FileChatBaseResponse, err error) {
	if !response.Success {
		utils.FileLog.Error("内容生成失败,code:%v,msg:%v", response.Ret, response.Msg)
		err = fmt.Errorf("内容生成失败,code:%v,msg:%v", response.Ret, response.Msg)
		return
	} else {
		var dataStr string
		// 按行分割输入
		lines := strings.Split(string(response.Data), "\n")
		// 遍历每一行，提取以 "data:" 开头的内容
		for _, line := range lines {
			if !strings.HasPrefix(line, ": ping") && strings.TrimSpace(line) != "" {
				// 去掉 "data:" 前缀
				dataStr += line
			}
		}
		// 去除 "data: " 前缀
		if strings.HasPrefix(dataStr, "data: ") {
			dataStr = strings.TrimPrefix(dataStr, "data: ")
			var streamResponse bus_response.AIGCEtaResponse
			parseErr := json.Unmarshal([]byte(dataStr), &streamResponse)
			if parseErr != nil {
				utils.FileLog.Error("内容生成失败,code:%v,msg:%v", parseErr)
				err = fmt.Errorf("内容生成失败,err:%v", parseErr)
				return
			}
			httpResponse.Data = streamResponse
			httpResponse.Msg = "返回成功"
			httpResponse.Code = 200
			return
		} else {
			parseErr := json.Unmarshal([]byte(dataStr), &httpResponse)
			if parseErr != nil {
				utils.FileLog.Error("内容生成失败,code:%v,msg:%v", parseErr)
				err = fmt.Errorf("内容生成失败,err:%v", parseErr)
				return
			}
			return
		}
	}
}