[feature] Push status edit messages into open streams (#2418)

* push status edit messages into open streams

* fix a few comments

* test++

* commented out code? moi?

internal/processing/stream/statusupdate.go

@@ -0,0 +1,38 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package stream
+
+import (
+	"encoding/json"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/stream"
+)
+
+// StatusUpdate streams the given edited status to any open, appropriate
+// streams belonging to the given account.
+func (p *Processor) StatusUpdate(s *apimodel.Status, account *gtsmodel.Account, streamTypes []string) error {
+	bytes, err := json.Marshal(s)
+	if err != nil {
+		return fmt.Errorf("error marshalling status to json: %s", err)
+	}
+
+	return p.toAccount(string(bytes), stream.EventTypeStatusUpdate, streamTypes, account.ID)
+}

internal/processing/stream/statusupdate_test.go

@@ -0,0 +1,137 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package stream_test
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/stream"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+)
+
+type StatusUpdateTestSuite struct {
+	StreamTestSuite
+}
+
+func (suite *StatusUpdateTestSuite) TestStreamNotification() {
+	account := suite.testAccounts["local_account_1"]
+
+	openStream, errWithCode := suite.streamProcessor.Open(context.Background(), account, "user")
+	suite.NoError(errWithCode)
+
+	editedStatus := suite.testStatuses["remote_account_1_status_1"]
+	apiStatus, err := typeutils.NewConverter(&suite.state).StatusToAPIStatus(context.Background(), editedStatus, account)
+	suite.NoError(err)
+
+	err = suite.streamProcessor.StatusUpdate(apiStatus, account, []string{stream.TimelineHome})
+	suite.NoError(err)
+
+	msg := <-openStream.Messages
+	dst := new(bytes.Buffer)
+	err = json.Indent(dst, []byte(msg.Payload), "", "  ")
+	suite.NoError(err)
+	suite.Equal(`{
+  "id": "01FVW7JHQFSFK166WWKR8CBA6M",
+  "created_at": "2021-09-20T10:40:37.000Z",
+  "in_reply_to_id": null,
+  "in_reply_to_account_id": null,
+  "sensitive": false,
+  "spoiler_text": "",
+  "visibility": "unlisted",
+  "language": "en",
+  "uri": "http://fossbros-anonymous.io/users/foss_satan/statuses/01FVW7JHQFSFK166WWKR8CBA6M",
+  "url": "http://fossbros-anonymous.io/@foss_satan/statuses/01FVW7JHQFSFK166WWKR8CBA6M",
+  "replies_count": 0,
+  "reblogs_count": 0,
+  "favourites_count": 0,
+  "favourited": false,
+  "reblogged": false,
+  "muted": false,
+  "bookmarked": false,
+  "pinned": false,
+  "content": "dark souls status bot: \"thoughts of dog\"",
+  "reblog": null,
+  "account": {
+    "id": "01F8MH5ZK5VRH73AKHQM6Y9VNX",
+    "username": "foss_satan",
+    "acct": "foss_satan@fossbros-anonymous.io",
+    "display_name": "big gerald",
+    "locked": false,
+    "discoverable": true,
+    "bot": false,
+    "created_at": "2021-09-26T10:52:36.000Z",
+    "note": "i post about like, i dunno, stuff, or whatever!!!!",
+    "url": "http://fossbros-anonymous.io/@foss_satan",
+    "avatar": "",
+    "avatar_static": "",
+    "header": "http://localhost:8080/assets/default_header.png",
+    "header_static": "http://localhost:8080/assets/default_header.png",
+    "followers_count": 0,
+    "following_count": 0,
+    "statuses_count": 3,
+    "last_status_at": "2021-09-11T09:40:37.000Z",
+    "emojis": [],
+    "fields": []
+  },
+  "media_attachments": [
+    {
+      "id": "01FVW7RXPQ8YJHTEXYPE7Q8ZY0",
+      "type": "image",
+      "url": "http://localhost:8080/fileserver/01F8MH5ZK5VRH73AKHQM6Y9VNX/attachment/original/01FVW7RXPQ8YJHTEXYPE7Q8ZY0.jpg",
+      "text_url": "http://localhost:8080/fileserver/01F8MH5ZK5VRH73AKHQM6Y9VNX/attachment/original/01FVW7RXPQ8YJHTEXYPE7Q8ZY0.jpg",
+      "preview_url": "http://localhost:8080/fileserver/01F8MH5ZK5VRH73AKHQM6Y9VNX/attachment/small/01FVW7RXPQ8YJHTEXYPE7Q8ZY0.jpg",
+      "remote_url": "http://fossbros-anonymous.io/attachments/original/13bbc3f8-2b5e-46ea-9531-40b4974d9912.jpg",
+      "preview_remote_url": "http://fossbros-anonymous.io/attachments/small/a499f55b-2d1e-4acd-98d2-1ac2ba6d79b9.jpg",
+      "meta": {
+        "original": {
+          "width": 472,
+          "height": 291,
+          "size": "472x291",
+          "aspect": 1.6219932
+        },
+        "small": {
+          "width": 472,
+          "height": 291,
+          "size": "472x291",
+          "aspect": 1.6219932
+        },
+        "focus": {
+          "x": 0,
+          "y": 0
+        }
+      },
+      "description": "tweet from thoughts of dog: i drank. all the water. in my bowl. earlier. but just now. i returned. to the same bowl. and it was. full again.. the bowl. is haunted",
+      "blurhash": "LARysgM_IU_3~pD%M_Rj_39FIAt6"
+    }
+  ],
+  "mentions": [],
+  "tags": [],
+  "emojis": [],
+  "card": null,
+  "poll": null
+}`, dst.String())
+	suite.Equal(msg.Event, "status.update")
+}
+
+func TestStatusUpdateTestSuite(t *testing.T) {
+	suite.Run(t, &StatusUpdateTestSuite{})
+}

internal/processing/stream/stream_test.go

@@ -30,6 +30,7 @@ import (
 type StreamTestSuite struct {
 	suite.Suite
 	testAccounts map[string]*gtsmodel.Account
+	testStatuses map[string]*gtsmodel.Status
 	testTokens   map[string]*gtsmodel.Token
 	db           db.DB
 	oauthServer  oauth.Server
@@ -45,6 +46,7 @@ func (suite *StreamTestSuite) SetupTest() {
 	testrig.InitTestConfig()
 
 	suite.testAccounts = testrig.NewTestAccounts()
+	suite.testStatuses = testrig.NewTestStatuses()
 	suite.testTokens = testrig.NewTestTokens()
 	suite.db = testrig.NewTestDB(&suite.state)
 	suite.state.DB = suite.db

internal/processing/workers/fromclientapi.go

@@ -416,6 +416,11 @@ func (p *clientAPI) UpdateStatus(ctx context.Context, cMsg messages.FromClientAP
 		}
 	}
 
+	// Push message that the status has been edited to streams.
+	if err := p.surface.timelineStatusUpdate(ctx, status); err != nil {
+		log.Errorf(ctx, "error streaming status edit: %v", err)
+	}
+
 	return nil
 }
 

internal/processing/workers/fromfediapi.go

@@ -530,6 +530,11 @@ func (p *fediAPI) UpdateStatus(ctx context.Context, fMsg messages.FromFediAPI) e
 		}
 	}
 
+	// Push message that the status has been edited to streams.
+	if err := p.surface.timelineStatusUpdate(ctx, status); err != nil {
+		log.Errorf(ctx, "error streaming status edit: %v", err)
+	}
+
 	return nil
 }
 

internal/processing/workers/surfacetimeline.go

@@ -390,3 +390,176 @@ func (s *surface) invalidateStatusFromTimelines(ctx context.Context, statusID st
 			Errorf("error unpreparing status from list timelines: %v", err)
 	}
 }
+
+// timelineStatusUpdate looks up HOME and LIST timelines of accounts
+// that follow the the status author and pushes edit messages into any
+// active streams.
+// Note that calling invalidateStatusFromTimelines takes care of the
+// state in general, we just need to do this for any streams that are
+// open right now.
+func (s *surface) timelineStatusUpdate(ctx context.Context, status *gtsmodel.Status) error {
+	// Ensure status fully populated; including account, mentions, etc.
+	if err := s.state.DB.PopulateStatus(ctx, status); err != nil {
+		return gtserror.Newf("error populating status with id %s: %w", status.ID, err)
+	}
+
+	// Get all local followers of the account that posted the status.
+	follows, err := s.state.DB.GetAccountLocalFollowers(ctx, status.AccountID)
+	if err != nil {
+		return gtserror.Newf("error getting local followers of account %s: %w", status.AccountID, err)
+	}
+
+	// If the poster is also local, add a fake entry for them
+	// so they can see their own status in their timeline.
+	if status.Account.IsLocal() {
+		follows = append(follows, &gtsmodel.Follow{
+			AccountID:   status.AccountID,
+			Account:     status.Account,
+			Notify:      func() *bool { b := false; return &b }(), // Account shouldn't notify itself.
+			ShowReblogs: func() *bool { b := true; return &b }(),  // Account should show own reblogs.
+		})
+	}
+
+	// Push to streams for each local follower of this account.
+	if err := s.timelineStatusUpdateForFollowers(ctx, status, follows); err != nil {
+		return gtserror.Newf("error timelining status %s for followers: %w", status.ID, err)
+	}
+
+	return nil
+}
+
+// timelineStatusUpdateForFollowers iterates through the given
+// slice of followers of the account that posted the given status,
+// pushing update messages into open list/home streams of each
+// follower.
+func (s *surface) timelineStatusUpdateForFollowers(
+	ctx context.Context,
+	status *gtsmodel.Status,
+	follows []*gtsmodel.Follow,
+) error {
+	var (
+		errs gtserror.MultiError
+	)
+
+	for _, follow := range follows {
+		// Check to see if the status is timelineable for this follower,
+		// taking account of its visibility, who it replies to, and, if
+		// it's a reblog, whether follower account wants to see reblogs.
+		//
+		// If it's not timelineable, we can just stop early, since lists
+		// are prettymuch subsets of the home timeline, so if it shouldn't
+		// appear there, it shouldn't appear in lists either.
+		timelineable, err := s.filter.StatusHomeTimelineable(
+			ctx, follow.Account, status,
+		)
+		if err != nil {
+			errs.Appendf("error checking status %s hometimelineability: %w", status.ID, err)
+			continue
+		}
+
+		if !timelineable {
+			// Nothing to do.
+			continue
+		}
+
+		// Add status to any relevant lists
+		// for this follow, if applicable.
+		s.listTimelineStatusUpdateForFollow(
+			ctx,
+			status,
+			follow,
+			&errs,
+		)
+
+		// Add status to home timeline for owner
+		// of this follow, if applicable.
+		err = s.timelineStreamStatusUpdate(
+			ctx,
+			follow.Account,
+			status,
+			stream.TimelineHome,
+		)
+		if err != nil {
+			errs.Appendf("error home timelining status: %w", err)
+			continue
+		}
+	}
+
+	return errs.Combine()
+}
+
+// listTimelineStatusUpdateForFollow pushes edits of the given status
+// into any eligible lists streams opened by the given follower.
+func (s *surface) listTimelineStatusUpdateForFollow(
+	ctx context.Context,
+	status *gtsmodel.Status,
+	follow *gtsmodel.Follow,
+	errs *gtserror.MultiError,
+) {
+	// To put this status in appropriate list timelines,
+	// we need to get each listEntry that pertains to
+	// this follow. Then, we want to iterate through all
+	// those list entries, and add the status to the list
+	// that the entry belongs to if it meets criteria for
+	// inclusion in the list.
+
+	// Get every list entry that targets this follow's ID.
+	listEntries, err := s.state.DB.GetListEntriesForFollowID(
+		// We only need the list IDs.
+		gtscontext.SetBarebones(ctx),
+		follow.ID,
+	)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		errs.Appendf("error getting list entries: %w", err)
+		return
+	}
+
+	// Check eligibility for each list entry (if any).
+	for _, listEntry := range listEntries {
+		eligible, err := s.listEligible(ctx, listEntry, status)
+		if err != nil {
+			errs.Appendf("error checking list eligibility: %w", err)
+			continue
+		}
+
+		if !eligible {
+			// Don't add this.
+			continue
+		}
+
+		// At this point we are certain this status
+		// should be included in the timeline of the
+		// list that this list entry belongs to.
+		if err := s.timelineStreamStatusUpdate(
+			ctx,
+			follow.Account,
+			status,
+			stream.TimelineList+":"+listEntry.ListID, // key streamType to this specific list
+		); err != nil {
+			errs.Appendf("error adding status to timeline for list %s: %w", listEntry.ListID, err)
+			// implicit continue
+		}
+	}
+}
+
+// timelineStatusUpdate streams the edited status to the user using the
+// given streamType.
+func (s *surface) timelineStreamStatusUpdate(
+	ctx context.Context,
+	account *gtsmodel.Account,
+	status *gtsmodel.Status,
+	streamType string,
+) error {
+	apiStatus, err := s.converter.StatusToAPIStatus(ctx, status, account)
+	if err != nil {
+		err = gtserror.Newf("error converting status %s to frontend representation: %w", status.ID, err)
+		return err
+	}
+
+	if err := s.stream.StatusUpdate(apiStatus, account, []string{streamType}); err != nil {
+		err = gtserror.Newf("error streaming update for status %s: %w", status.ID, err)
+		return err
+	}
+
+	return nil
+}

internal/stream/stream.go

@@ -26,6 +26,9 @@ const (
 	EventTypeUpdate string = "update"
 	// EventTypeDelete -- something should be deleted from a user
 	EventTypeDelete string = "delete"
+	// EventTypeStatusUpdate -- something in the user's timeline has been edited
+	// (yes this is a confusing name, blame Mastodon)
+	EventTypeStatusUpdate string = "status.update"
 )
 
 const (