add support for self-service opt out

in particular:

follow:
- (no record) -> PENDING
- OPTED_OUT -> APPROVED

unfollow:
- PENDING -> NONE
- APPROVED -> OPTED_OUT

this also tries to normalize NONE status with record not present

Author: tolfdog

ingester/candidate_actor_cache.go

@@ -3,10 +3,11 @@ package ingester
 import (
 	"context"
 	"fmt"
-	"github.com/jonboulle/clockwork"
 	"sync"
 	"time"
 
+	"github.com/jonboulle/clockwork"
+
 	v1 "github.com/strideynet/bsky-furry-feed/proto/bff/v1"
 	"github.com/strideynet/bsky-furry-feed/store"
 	"go.uber.org/zap"
@@ -78,6 +79,9 @@ func (crc *ActorCache) Sync(ctx context.Context) error {
 
 	mapped := map[string]*v1.Actor{}
 	for _, cr := range data {
+		if cr.Status == v1.ActorStatus_ACTOR_STATUS_NONE {
+			continue
+		}
 		mapped[cr.Did] = cr
 	}
 
@@ -128,3 +132,44 @@ func (crc *ActorCache) CreatePendingCandidateActor(ctx context.Context, did stri
 	crc.cached[ca.Did] = ca
 	return nil
 }
+
+func (crc *ActorCache) OptIn(ctx context.Context, did string) (err error) {
+	ctx, span := tracer.Start(ctx, "actor_cache.opt_in")
+	defer func() {
+		endSpan(span, err)
+	}()
+
+	status, err := crc.store.OptInActor(ctx, did)
+	if err != nil {
+		return fmt.Errorf("opting in actor: %w", err)
+	}
+
+	crc.mu.Lock()
+	defer crc.mu.Unlock()
+	ca := crc.cached[did]
+	if ca != nil {
+		ca.Status = status
+	}
+
+	return nil
+}
+
+func (crc *ActorCache) OptOutOrForget(ctx context.Context, did string) (err error) {
+	ctx, span := tracer.Start(ctx, "actor_cache.opt_out")
+	defer func() {
+		endSpan(span, err)
+	}()
+
+	status, err := crc.store.OptOutOrForgetActor(ctx, did)
+	if err != nil {
+		return fmt.Errorf("opting out actor: %w", err)
+	}
+
+	crc.mu.Lock()
+	defer crc.mu.Unlock()
+	if status == v1.ActorStatus_ACTOR_STATUS_NONE {
+		delete(crc.cached, did)
+	}
+
+	return nil
+}

ingester/handle_graph_follow.go

@@ -39,23 +39,38 @@ func (fi *FirehoseIngester) handleGraphFollowCreate(
 		return fmt.Errorf("creating follow: %w", err)
 	}
 
+	if fi.IsFurryFeedDID(data.Subject) {
+		if err := fi.actorCache.OptIn(ctx, repoDID); err != nil {
+			return fmt.Errorf("opting in: %w", err)
+		}
+	}
+
 	return nil
 }
 
 func (fi *FirehoseIngester) handleGraphFollowDelete(
 	ctx context.Context,
+	repoDID string,
 	recordUri string,
 ) (err error) {
 	ctx, span := tracer.Start(ctx, "firehose_ingester.handle_feed_follow_delete")
 	defer func() {
 		endSpan(span, err)
 	}()
 
-	if err := fi.store.DeleteFollow(
+	subjectDID, err := fi.store.DeleteFollow(
 		ctx, store.DeleteFollowOpts{URI: recordUri},
-	); err != nil {
+	)
+
+	if err != nil {
 		return fmt.Errorf("deleting follow: %w", err)
 	}
 
+	if fi.IsFurryFeedDID(subjectDID) {
+		if err := fi.actorCache.OptOutOrForget(ctx, repoDID); err != nil {
+			return fmt.Errorf("opting out: %w", err)
+		}
+	}
+
 	return nil
 }

ingester/ingester.go

@@ -5,9 +5,10 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/bluesky-social/indigo/events/schedulers/sequential"
 	"strconv"
 
+	"github.com/bluesky-social/indigo/events/schedulers/sequential"
+
 	"github.com/bluesky-social/indigo/util"
 	"github.com/ipfs/go-cid"
 
@@ -49,6 +50,8 @@ var workItemsProcessed = promauto.NewSummaryVec(prometheus.SummaryOpts{
 type actorCacher interface {
 	GetByDID(did string) *v1.Actor
 	CreatePendingCandidateActor(ctx context.Context, did string) (err error)
+	OptIn(ctx context.Context, did string) (err error)
+	OptOutOrForget(ctx context.Context, did string) (err error)
 }
 
 var workerCursors = promauto.NewGaugeVec(prometheus.GaugeOpts{
@@ -342,15 +345,18 @@ func (fi *FirehoseIngester) handleCommit(ctx context.Context, evt *atproto.SyncS
 	return nil
 }
 
+func (fi *FirehoseIngester) IsFurryFeedDID(did string) bool {
+	// TODO: Make this not hard coded
+	// https://bsky.app/profile/furryli.st
+	return did == "did:plc:jdkvwye2lf4mingzk7qdebzc"
+}
+
 func (fi *FirehoseIngester) isFurryFeedFollow(record typegen.CBORMarshaler) bool {
 	follow, ok := record.(*bsky.GraphFollow)
 	if !ok {
 		return false
 	}
-
-	// TODO: Make this not hard coded
-	// https://bsky.app/profile/furryli.st
-	return follow.Subject == "did:plc:jdkvwye2lf4mingzk7qdebzc"
+	return fi.IsFurryFeedDID(follow.Subject)
 }
 
 func endSpan(span trace.Span, err error) {
@@ -461,7 +467,7 @@ func (fi *FirehoseIngester) handleRecordDelete(
 	case "app.bsky.feed.like":
 		err = fi.handleFeedLikeDelete(ctx, recordUri)
 	case "app.bsky.graph.follow":
-		err = fi.handleGraphFollowDelete(ctx, recordUri)
+		err = fi.handleGraphFollowDelete(ctx, repoDID, recordUri)
 	default:
 		span.AddEvent("ignoring record due to unrecognized type")
 	}

proto/bff/v1/types.pb.go

@@ -12,6 +12,7 @@ enum ActorStatus {
   ACTOR_STATUS_APPROVED = 2;
   ACTOR_STATUS_BANNED = 3;
   ACTOR_STATUS_NONE = 4;
+  ACTOR_STATUS_OPTED_OUT = 5;
 }
 
 message Actor {
@@ -40,4 +41,4 @@ message Actor {
   // is ignored in the queue to be processed later, e.g. when the actor doesn’t
   // have an avatar
   google.protobuf.Timestamp held_until = 8;
-}
+}

proto/bff/v1/types.proto

@@ -0,0 +1 @@
+-- Sorry, can't actually undo this!

store/gen/candidate_actors.sql.go

@@ -0,0 +1 @@
+ALTER TYPE actor_status ADD VALUE IF NOT EXISTS 'opted_out';