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package main
import (
"bytes"
"elefant/models"
"encoding/json"
"io"
"strings"
)
type ChunkParser interface {
ParseChunk([]byte) (string, bool, error)
FormMsg(msg, role string, cont bool) (io.Reader, error)
}
func initChunkParser() {
chunkParser = LlamaCPPeer{}
if strings.Contains(cfg.CurrentAPI, "v1") {
logger.Debug("chosen /v1/chat parser")
chunkParser = OpenAIer{}
return
}
logger.Debug("chosen llamacpp /completion parser")
}
type LlamaCPPeer struct {
}
type OpenAIer struct {
}
func (lcp LlamaCPPeer) FormMsg(msg, role string, resume bool) (io.Reader, error) {
if msg != "" { // otherwise let the bot to continue
newMsg := models.RoleMsg{Role: role, Content: msg}
chatBody.Messages = append(chatBody.Messages, newMsg)
// if rag
if cfg.RAGEnabled {
ragResp, err := chatRagUse(newMsg.Content)
if err != nil {
logger.Error("failed to form a rag msg", "error", err)
return nil, err
}
ragMsg := models.RoleMsg{Role: cfg.ToolRole, Content: ragResp}
chatBody.Messages = append(chatBody.Messages, ragMsg)
}
}
if cfg.ToolUse && !resume {
// add to chat body
chatBody.Messages = append(chatBody.Messages, models.RoleMsg{Role: cfg.ToolRole, Content: toolSysMsg})
}
messages := make([]string, len(chatBody.Messages))
for i, m := range chatBody.Messages {
messages[i] = m.ToPrompt()
}
prompt := strings.Join(messages, "\n")
// strings builder?
if !resume {
botMsgStart := "\n" + cfg.AssistantRole + ":\n"
prompt += botMsgStart
}
if cfg.ThinkUse && !cfg.ToolUse {
prompt += "<think>"
}
logger.Debug("checking prompt for /completion", "tool_use", cfg.ToolUse,
"msg", msg, "resume", resume, "prompt", prompt)
payload := models.NewLCPReq(prompt, cfg, defaultLCPProps)
data, err := json.Marshal(payload)
if err != nil {
logger.Error("failed to form a msg", "error", err)
return nil, err
}
return bytes.NewReader(data), nil
}
func (lcp LlamaCPPeer) ParseChunk(data []byte) (string, bool, error) {
llmchunk := models.LlamaCPPResp{}
if err := json.Unmarshal(data, &llmchunk); err != nil {
logger.Error("failed to decode", "error", err, "line", string(data))
return "", false, err
}
if llmchunk.Stop {
if llmchunk.Content != "" {
logger.Error("text inside of finish llmchunk", "chunk", llmchunk)
}
return llmchunk.Content, true, nil
}
return llmchunk.Content, false, nil
}
func (op OpenAIer) ParseChunk(data []byte) (string, bool, error) {
llmchunk := models.LLMRespChunk{}
if err := json.Unmarshal(data, &llmchunk); err != nil {
logger.Error("failed to decode", "error", err, "line", string(data))
return "", false, err
}
content := llmchunk.Choices[len(llmchunk.Choices)-1].Delta.Content
if llmchunk.Choices[len(llmchunk.Choices)-1].FinishReason == "stop" {
if content != "" {
logger.Error("text inside of finish llmchunk", "chunk", llmchunk)
}
return content, true, nil
}
return content, false, nil
}
func (op OpenAIer) FormMsg(msg, role string, resume bool) (io.Reader, error) {
if cfg.ToolUse && !resume {
// prompt += "\n" + cfg.ToolRole + ":\n" + toolSysMsg
// add to chat body
chatBody.Messages = append(chatBody.Messages, models.RoleMsg{Role: cfg.ToolRole, Content: toolSysMsg})
}
if msg != "" { // otherwise let the bot continue
newMsg := models.RoleMsg{Role: role, Content: msg}
chatBody.Messages = append(chatBody.Messages, newMsg)
// if rag
if cfg.RAGEnabled {
ragResp, err := chatRagUse(newMsg.Content)
if err != nil {
logger.Error("failed to form a rag msg", "error", err)
return nil, err
}
ragMsg := models.RoleMsg{Role: cfg.ToolRole, Content: ragResp}
chatBody.Messages = append(chatBody.Messages, ragMsg)
}
}
data, err := json.Marshal(chatBody)
if err != nil {
logger.Error("failed to form a msg", "error", err)
return nil, err
}
return bytes.NewReader(data), nil
}
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