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package fetchers
import (
"encoding/json"
"fmt"
"io"
"llostre/backend/auth"
"llostre/backend/general"
"llostre/backend/notes"
"log/slog"
"net/http"
)
type ListRecordsResponse struct {
Records []notes.AppBskyFeedPostRecord `json:"records"`
}
func FetchAppBskyFeedPosts(logger *slog.Logger, did, pdsURL, accessToken string, keypair *auth.DPoPKeyPair, notesCache *Cache) ([]notes.Note, error) {
url := fmt.Sprintf("%s/xrpc/com.atproto.repo.listRecords?repo=%s&collection=app.bsky.feed.post", pdsURL, did)
logger.Debug("generating DPoP proof", "url", url)
dpopProof, err := keypair.GenerateDPoPProof("GET", url, "")
if err != nil {
logger.Error("DPoP generation failed", "error", err)
return nil, err
}
logger.Debug("making request to PDS")
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
req.Header.Set("Authorization", "Bearer "+accessToken)
req.Header.Set("DPoP", dpopProof)
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
var response ListRecordsResponse
if err := json.NewDecoder(resp.Body).Decode(&response); err != nil {
return nil, err
}
profile, err := FetchProfile(did, pdsURL, notesCache)
if err != nil {
logger.Error("profile fetch failed", "did", did, "error", err)
} else {
logger.Debug("fetched profile")
}
posts := make([]notes.Note, 0, len(response.Records))
for _, record := range response.Records {
bp, err := notes.AppBskyFeedPostFromRecord(record, profile)
if err != nil {
logger.Error("failed to convert record", "error", err, "uri", record.URI)
continue
}
notesCache.Set(bp.URI, bp)
posts = append(posts, *bp)
}
return posts, nil
}
func FetchPostByURI(uri, accessToken string, keypair *auth.DPoPKeyPair, cache *Cache) (*notes.Note, error) {
// check cache
if cached, found := cache.Get(uri); found {
return cached, nil
}
repo, collection, rkey, err := general.ParseURI(uri)
// need to resolve DID to PDS
pds, err := FetchPDS(repo)
if err != nil {
return nil, err
}
url := fmt.Sprintf("%s/xrpc/com.atproto.repo.getRecord?repo=%s&collection=%s&rkey=%s",
pds, repo, collection, rkey)
// fetch with DPoP
dpopProof, err := keypair.GenerateDPoPProof("GET", url, "")
if err != nil {
return nil, err
}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
req.Header.Set("Authorization", "Bearer "+accessToken)
req.Header.Set("DPoP", dpopProof)
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return nil, fmt.Errorf("PDS returned status %d: %s", resp.StatusCode, string(body))
}
var result struct {
URI string `json:"uri"`
Value json.RawMessage `json:"value"`
}
if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
return nil, err
}
// convert to AppBskyFeedPostRecord
record := notes.AppBskyFeedPostRecord{
URI: result.URI,
}
if err := json.Unmarshal(result.Value, &record.Value); err != nil {
return nil, err
}
// get author of the note
profile, found := cache.GetProfile(repo)
if !found {
profile, err = FetchProfile(repo, pds, cache)
}
if err != nil {
return nil, err
}
note, err := notes.AppBskyFeedPostFromRecord(record, profile)
if err != nil {
return nil, err
}
// cache it
cache.Set(note.URI, note)
return note, nil
}
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