Refactor: rag to sep package
This commit is contained in:
Grail Finder
240
rag/main.go
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240
rag/main.go
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@@ -0,0 +1,240 @@
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package rag
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import (
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"bytes"
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"elefant/config"
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"elefant/models"
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"elefant/storage"
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"encoding/json"
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"errors"
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"fmt"
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"log/slog"
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"net/http"
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"os"
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"github.com/neurosnap/sentences/english"
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)
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type RAG struct {
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logger *slog.Logger
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store storage.FullRepo
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cfg *config.Config
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}
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func New(l *slog.Logger, s storage.FullRepo, cfg *config.Config) *RAG {
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return &RAG{
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logger: l,
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store: s,
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cfg: cfg,
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}
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}
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func (r *RAG) LoadRAG(fpath string) error {
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data, err := os.ReadFile(fpath)
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if err != nil {
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return err
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}
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r.logger.Info("rag: loaded file", "fp", fpath)
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fileText := string(data)
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tokenizer, err := english.NewSentenceTokenizer(nil)
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if err != nil {
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return err
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}
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sentences := tokenizer.Tokenize(fileText)
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sents := make([]string, len(sentences))
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r.logger.Info("rag: sentences", "#", len(sents))
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for i, s := range sentences {
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sents[i] = s.Text
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}
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// TODO: maybe better to decide batch size based on sentences len
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var (
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// TODO: to config
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workers = 5
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batchSize = 200
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maxChSize = 1000
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//
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left = 0
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right = batchSize
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batchCh = make(chan map[int][]string, maxChSize)
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vectorCh = make(chan []models.VectorRow, maxChSize)
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errCh = make(chan error, 1)
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doneCh = make(chan bool, 1)
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)
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if len(sents) < batchSize {
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batchSize = len(sents)
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}
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// fill input channel
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ctn := 0
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for {
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if right > len(sents) {
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batchCh <- map[int][]string{left: sents[left:]}
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break
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}
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batchCh <- map[int][]string{left: sents[left:right]}
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left, right = right, right+batchSize
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ctn++
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}
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r.logger.Info("finished batching", "batches#", len(batchCh))
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for w := 0; w < workers; w++ {
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go r.batchToVectorHFAsync(len(sents), batchCh, vectorCh, errCh, doneCh)
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}
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// write to db
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return r.writeVectors(vectorCh, doneCh)
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}
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func (r *RAG) writeVectors(vectorCh <-chan []models.VectorRow, doneCh <-chan bool) error {
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for {
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select {
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case batch := <-vectorCh:
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for _, vector := range batch {
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if err := r.store.WriteVector(&vector); err != nil {
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return err
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}
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}
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r.logger.Info("wrote batch to db", "size", len(batch))
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case <-doneCh:
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r.logger.Info("rag finished")
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return nil
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}
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}
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}
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func (r *RAG) batchToVectorHFAsync(limit int, inputCh <-chan map[int][]string,
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vectorCh chan<- []models.VectorRow, errCh chan error, doneCh chan bool) {
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r.logger.Info("to vector batches", "batches#", len(inputCh))
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for {
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select {
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case linesMap := <-inputCh:
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// r.logger.Info("batch from ch")
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for leftI, v := range linesMap {
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// r.logger.Info("fetching", "index", leftI)
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r.fecthEmbHF(v, errCh, vectorCh, fmt.Sprintf("test_%d", leftI))
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if leftI+200 >= limit { // last batch
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doneCh <- true
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return
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}
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// r.logger.Info("done feitching", "index", leftI)
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}
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case <-doneCh:
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r.logger.Info("got done")
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close(errCh)
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close(doneCh)
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return
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case err := <-errCh:
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r.logger.Error("got an error", "error", err)
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return
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}
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}
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}
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func (r *RAG) fecthEmbHF(lines []string, errCh chan error, vectorCh chan<- []models.VectorRow, slug string) {
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payload, err := json.Marshal(
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map[string]any{"inputs": lines, "options": map[string]bool{"wait_for_model": true}},
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)
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if err != nil {
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r.logger.Error("failed to marshal payload", "err:", err.Error())
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errCh <- err
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return
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}
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req, err := http.NewRequest("POST", r.cfg.EmbedURL, bytes.NewReader(payload))
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if err != nil {
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r.logger.Error("failed to create new req", "err:", err.Error())
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errCh <- err
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return
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}
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req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", r.cfg.HFToken))
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resp, err := http.DefaultClient.Do(req)
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// nolint
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// resp, err := httpClient.Post(cfg.EmbedURL, "application/json", bytes.NewReader(payload))
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if err != nil {
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r.logger.Error("failed to embedd line", "err:", err.Error())
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errCh <- err
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return
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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r.logger.Error("non 200 resp", "code", resp.StatusCode)
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return
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// err = fmt.Errorf("non 200 resp; url: %s; code %d", r.cfg.EmbedURL, resp.StatusCode)
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// errCh <- err
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// return
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}
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emb := [][]float32{}
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if err := json.NewDecoder(resp.Body).Decode(&emb); err != nil {
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r.logger.Error("failed to embedd line", "err:", err.Error())
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errCh <- err
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return
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}
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if len(emb) == 0 {
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r.logger.Error("empty emb")
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err = errors.New("empty emb")
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errCh <- err
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return
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}
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vectors := make([]models.VectorRow, len(emb))
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for i, e := range emb {
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vector := models.VectorRow{
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Embeddings: e,
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RawText: lines[i],
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Slug: slug,
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}
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vectors[i] = vector
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}
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vectorCh <- vectors
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}
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func (r *RAG) LineToVector(line string) ([]float32, error) {
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// payload, err := json.Marshal(map[string]string{"content": line})
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lines := []string{line}
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payload, err := json.Marshal(
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map[string]any{"inputs": lines, "options": map[string]bool{"wait_for_model": true}},
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)
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if err != nil {
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r.logger.Error("failed to marshal payload", "err:", err.Error())
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return nil, err
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}
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// nolint
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req, err := http.NewRequest("POST", r.cfg.EmbedURL, bytes.NewReader(payload))
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if err != nil {
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r.logger.Error("failed to create new req", "err:", err.Error())
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return nil, err
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}
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req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", r.cfg.HFToken))
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resp, err := http.DefaultClient.Do(req)
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// resp, err := req.Post(r.cfg.EmbedURL, "application/json", bytes.NewReader(payload))
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if err != nil {
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r.logger.Error("failed to embedd line", "err:", err.Error())
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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err = fmt.Errorf("non 200 resp; code: %v\n", resp.StatusCode)
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r.logger.Error(err.Error())
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return nil, err
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}
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// emb := models.EmbeddingResp{}
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emb := [][]float32{}
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if err := json.NewDecoder(resp.Body).Decode(&emb); err != nil {
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r.logger.Error("failed to embedd line", "err:", err.Error())
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return nil, err
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}
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if len(emb) == 0 || len(emb[0]) == 0 {
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r.logger.Error("empty emb")
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err = errors.New("empty emb")
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return nil, err
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}
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return emb[0], nil
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}
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func (r *RAG) saveLine(topic, line string, emb *models.EmbeddingResp) error {
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row := &models.VectorRow{
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Embeddings: emb.Embedding,
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Slug: topic,
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RawText: line,
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}
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return r.store.WriteVector(row)
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}
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func (r *RAG) SearchEmb(emb *models.EmbeddingResp) ([]models.VectorRow, error) {
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return r.store.SearchClosest(emb.Embedding)
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}
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