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package guestidentity
import (
"context"
"encoding/json"
"errors"
"fmt"
"log/slog"
"time"
"github.com/johnandersen777/socialweb-computer-kcp/internal/atproto/market"
"github.com/johnandersen777/socialweb-computer-kcp/internal/contract/atprotorepo"
)
const (
RBACCollection = "com.fedproxy.rbac"
maximumRBACPages = 100
maximumRBACRecords = 5000
)
var RBACAtAcceptSince = time.Date(2026, time.October, 30, 21, 18, 3, 0, time.UTC)
type RepoRBAC struct {
Reader atprotorepo.RecordReader
Log *slog.Logger
}
func (h *RepoRBAC) Records(ctx context.Context, requesterDID, acceptURI string, acceptedAt time.Time) ([]RBACRecord, error) {
if h == nil || h.Reader == nil {
return nil, errors.New("guestidentity: the RBAC reader has no record reader")
}
log := h.Log
if log == nil {
log = slog.New(slog.DiscardHandler)
}
if key := market.RBACRKeyOfAccept(acceptURI); key != "" {
record, err := h.Reader.GetRecord(ctx, requesterDID, RBACCollection, key)
switch {
case err == nil:
var rb RBACRecord
if err := json.Unmarshal(record.Value, &rb); err != nil {
log.Warn("a requester RBAC record is not one and is skipped", "requester", requesterDID, "rkey", key, "err", err.Error())
return []RBACRecord{}, nil
}
return []RBACRecord{rb}, nil
case !errors.Is(err, atprotorepo.ErrNotFound):
return nil, fmt.Errorf("guestidentity: reading the RBAC record %s of %s: %w", key, requesterDID, err)
}
}
if acceptedAt.IsZero() || !acceptedAt.Before(RBACAtAcceptSince) {
return []RBACRecord{}, nil
}
return h.listed(ctx, requesterDID, log)
}
func (h *RepoRBAC) listed(ctx context.Context, requesterDID string, log *slog.Logger) ([]RBACRecord, error) {
out := []RBACRecord{}
cursor := ""
seen := map[string]bool{}
for range maximumRBACPages {
page, err := h.Reader.ListRecords(ctx, requesterDID, RBACCollection, atprotorepo.ListOptions{Limit: 100, Cursor: cursor})
if err != nil && cursor == "" && errors.Is(err, atprotorepo.ErrNotFound) {
return out, nil
}
if err != nil {
return nil, fmt.Errorf("guestidentity: listing the RBAC records of %s: %w", requesterDID, err)
}
for _, record := range page.Records {
var rb RBACRecord
if err := json.Unmarshal(record.Value, &rb); err != nil {
log.Warn("a requester RBAC record is not one and is skipped", "requester", requesterDID, "err", err.Error())
continue
}
out = append(out, rb)
if len(out) >= maximumRBACRecords {
return out, nil
}
}
if page.Cursor == "" {
return out, nil
}
if seen[page.Cursor] {
return nil, fmt.Errorf("guestidentity: the RBAC records of %s repeat cursor %q", requesterDID, page.Cursor)
}
seen[page.Cursor] = true
cursor = page.Cursor
}
return nil, fmt.Errorf("guestidentity: the RBAC records of %s run past %d pages", requesterDID, maximumRBACPages)
}
