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private_readidx.go
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private_readidx.go
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// SPDX-FileCopyrightText: 2021 The Go-SSB Authors
//
// SPDX-License-Identifier: MIT
package multilogs
import (
"bytes"
"context"
"encoding/base64"
"errors"
"fmt"
"os"
"github.com/dgraph-io/badger/v3"
"github.com/ssbc/margaret"
librarian "github.com/ssbc/margaret/indexes"
"github.com/ssbc/margaret/multilog"
multibadger "github.com/ssbc/margaret/multilog/roaring/badger"
kitlog "go.mindeco.de/log"
"go.mindeco.de/log/level"
gabbygrove "github.com/ssbc/go-gabbygrove"
"github.com/ssbc/go-ssb"
refs "github.com/ssbc/go-ssb-refs"
"github.com/ssbc/go-ssb/internal/storedrefs"
"github.com/ssbc/go-ssb/message/multimsg"
"github.com/ssbc/go-ssb/private/box"
"github.com/ssbc/go-ssb/repo"
)
const IndexNamePrivates = "privates"
/* deprecated
// not strictly a multilog but allows multiple keys and gives us the good resumption
func NewPrivateRead(log kitlog.Logger, kps ...*ssb.KeyPair) *Private {
return &Private{
logger: log,
keyPairs: kps,
boxer: box.NewBoxer(nil),
}
}
*/
type Private struct {
logger kitlog.Logger
keyPairs []ssb.KeyPair
boxer *box.Boxer
}
// OpenRoaring uses roaring bitmaps with a slim key-value store backend
func (pr Private) OpenRoaring(r repo.Interface, db *badger.DB) (multilog.MultiLog, librarian.SinkIndex, error) {
mlog, err := multibadger.NewShared(db, []byte(IndexNamePrivates))
if err != nil {
return nil, nil, err
}
idxStatePath := r.GetPath("multilogs", IndexNamePrivates, "idx-state")
idxStateFile, err := os.Create(idxStatePath) // OpenFile(|create) ?
if err != nil {
return nil, nil, err
}
snk := multilog.NewSink(idxStateFile, mlog, pr.update)
return mlog, snk, nil
}
func (pr Private) update(ctx context.Context, seq int64, val interface{}, mlog multilog.MultiLog) error {
if nulled, ok := val.(error); ok {
if margaret.IsErrNulled(nulled) {
return nil
}
return nulled
}
msg, ok := val.(refs.Message)
if !ok {
err := fmt.Errorf("private/readidx: error casting message. got type %T", val)
return err
}
var boxedContent []byte
switch msg.Author().Algo() {
case refs.RefAlgoFeedSSB1:
input := msg.ContentBytes()
if !(input[0] == '"' && input[len(input)-1] == '"') {
return nil // not a json string
}
b64data := bytes.TrimSuffix(input[1:], []byte(".box\""))
boxedData := make([]byte, len(b64data))
n, err := base64.StdEncoding.Decode(boxedData, b64data)
if err != nil {
err = fmt.Errorf("private/readidx: invalid b64 encoding: %w", err)
level.Debug(pr.logger).Log("msg", "unboxLog b64 decode failed", "err", err)
return nil
}
boxedContent = boxedData[:n]
case refs.RefAlgoFeedGabby:
mm, ok := val.(multimsg.MultiMessage)
if !ok {
mmPtr, ok := val.(*multimsg.MultiMessage)
if !ok {
err := fmt.Errorf("private/readidx: error casting message. got type %T", val)
return err
}
mm = *mmPtr
}
tr, ok := mm.AsGabby()
if !ok {
err := errors.New("private/readidx: error getting gabby msg")
return err
}
evt, err := tr.UnmarshaledEvent()
if err != nil {
return fmt.Errorf("private/readidx: error unpacking event from stored message: %w", err)
}
if evt.Content.Type != gabbygrove.ContentTypeArbitrary {
return nil
}
boxedContent = bytes.TrimPrefix(tr.Content, []byte("box1:"))
default:
err := fmt.Errorf("private/readidx: unknown feed type: %s", msg.Author().Algo())
level.Warn(pr.logger).Log("msg", "unahndled type", "err", err)
return err
}
for _, kp := range pr.keyPairs {
if _, err := pr.boxer.Decrypt(kp, boxedContent); err != nil {
continue
}
userPrivs, err := mlog.Get(storedrefs.Feed(kp.ID()))
if err != nil {
return fmt.Errorf("private/readidx: error opening priv sublog for %s: %w", kp.ID().String(), err)
}
_, err = userPrivs.Append(seq)
if err != nil {
return fmt.Errorf("private/readidx: error appending PM for %s: %w", kp.ID().String(), err)
}
}
return nil
}