pull-pal/llm/common.go

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package llm
import (
"bytes"
"html/template"
"strings"
)
// File represents a file in a git repository.
type File struct {
Path string
Contents string
}
// CodeChangeRequest contains all necessary information for generating a prompt for a LLM.
type CodeChangeRequest struct {
Files []File
Subject string
Body string
IssueID string
}
// String is the string representation of a CodeChangeRequest. Functionally, it contains the LLM prompt.
func (req CodeChangeRequest) String() string {
prompt := req.MustGetPrompt()
return "START OF PROMPT\n" + prompt + "\nEND OF PROMPT"
}
// MustGetPrompt only returns the prompt, but panics if the data in the request cannot populate the template.
func (req CodeChangeRequest) MustGetPrompt() string {
prompt, err := req.GetPrompt()
if err != nil {
panic(err)
}
return prompt
}
// GetPrompt converts the information in the request to a prompt for an LLM.
func (req CodeChangeRequest) GetPrompt() (string, error) {
tmpl, err := template.ParseFiles("./llm/code-change-request.tmpl")
if err != nil {
return "", err
}
var result bytes.Buffer
err = tmpl.Execute(&result, req)
if err != nil {
return "", err
}
return result.String(), nil
}
// CodeChangeResponse contains data derived from an LLM response to a prompt generated via a CodeChangeRequest.
type CodeChangeResponse struct {
Files []File
Notes string
}
// String is a string representation of CodeChangeResponse.
func (res CodeChangeResponse) String() string {
out := "Notes:\n"
out += res.Notes + "\n\n"
out += "Files:\n"
for _, f := range res.Files {
out += f.Path + ":\n```\n"
out += f.Contents + "\n```\n"
}
return out
}
// ParseCodeChangeResponse parses the LLM's response to CodeChangeRequest (string) into a CodeChangeResponse.
func ParseCodeChangeResponse(llmResponse string) CodeChangeResponse {
sections := strings.Split(llmResponse, "Notes:")
filesSection := sections[0]
notes := strings.TrimSpace(sections[1])
files := parseFiles(filesSection)
return CodeChangeResponse{
Files: files,
Notes: notes,
}
}
// parseFiles process the "files" subsection of the LLM's response. It is a helper for GetCodeChangeResponse.
func parseFiles(filesSection string) []File {
fileStringList := strings.Split(filesSection, "name:")
// first item in the list is just gonna be "Files:"
fileStringList = fileStringList[1:]
fileList := make([]File, len(fileStringList))
for i, f := range fileStringList {
fileParts := strings.Split(f, "contents:")
path := strings.TrimSpace(fileParts[0])
// TODO currently, copy-pasting code from chatgpt also copies some additional text
// the following separates this unintended section from the actual intended contents of the file
contentParts := strings.Split(fileParts[1], "Copy code")
contents := strings.TrimSpace(contentParts[1])
fileList[i] = File{
Path: path,
Contents: contents,
}
}
return fileList
}