Notifications (#34)

Notifications working for:

* Mentions
* Faves
* New follow requests
* New followers

internal/api/client/notification/notification.go

@@ -0,0 +1,66 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 notification
+
+import (
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/message"
+	"github.com/superseriousbusiness/gotosocial/internal/router"
+)
+
+const (
+	// IDKey is for notification UUIDs
+	IDKey = "id"
+	// BasePath is the base path for serving the notification API
+	BasePath = "/api/v1/notifications"
+	// BasePathWithID is just the base path with the ID key in it.
+	// Use this anywhere you need to know the ID of the notification being queried.
+	BasePathWithID = BasePath + "/:" + IDKey
+
+	// MaxIDKey is the url query for setting a max notification ID to return
+	MaxIDKey = "max_id"
+	// Limit key is for specifying maximum number of notifications to return.
+	LimitKey = "limit"
+)
+
+// Module implements the ClientAPIModule interface for every related to posting/deleting/interacting with notifications
+type Module struct {
+	config    *config.Config
+	processor message.Processor
+	log       *logrus.Logger
+}
+
+// New returns a new notification module
+func New(config *config.Config, processor message.Processor, log *logrus.Logger) api.ClientModule {
+	return &Module{
+		config:    config,
+		processor: processor,
+		log:       log,
+	}
+}
+
+// Route attaches all routes from this module to the given router
+func (m *Module) Route(r router.Router) error {
+	r.AttachHandler(http.MethodGet, BasePath, m.NotificationsGETHandler)
+	return nil
+}

internal/api/client/notification/notificationsget.go

@@ -0,0 +1,72 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 notification
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (m *Module) NotificationsGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "NotificationsGETHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+	l.Debugf("entering function")
+
+	authed, err := oauth.Authed(c, true, true, true, true) // we don't really need an app here but we want everything else
+	if err != nil {
+		l.Errorf("error authing status faved by request: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": "not authed"})
+		return
+	}
+
+	limit := 20
+	limitString := c.Query(LimitKey)
+	if limitString != "" {
+		i, err := strconv.ParseInt(limitString, 10, 64)
+		if err != nil {
+			l.Debugf("error parsing limit string: %s", err)
+			c.JSON(http.StatusBadRequest, gin.H{"error": "couldn't parse limit query param"})
+			return
+		}
+		limit = int(i)
+	}
+
+	maxID := ""
+	maxIDString := c.Query(MaxIDKey)
+	if maxIDString != "" {
+		maxID = maxIDString
+	}
+
+	notifs, errWithCode := m.processor.NotificationsGet(authed, limit, maxID)
+	if errWithCode != nil {
+		l.Debugf("error processing notifications get: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, notifs)
+}

internal/api/model/notification.go

@@ -41,5 +41,5 @@ type Notification struct {
 	// OPTIONAL
 
 	// Status that was the object of the notification, e.g. in mentions, reblogs, favourites, or polls.
-	Status *Status `json:"status"`
+	Status *Status `json:"status,omitempty"`
 }

internal/api/model/status.go

@@ -31,7 +31,7 @@ type Status struct {
 	// Is this status marked as sensitive content?
 	Sensitive bool `json:"sensitive"`
 	// Subject or summary line, below which status content is collapsed until expanded.
-	SpoilerText string `json:"spoiler_text,omitempty"`
+	SpoilerText string `json:"spoiler_text"`
 	// Visibility of this status.
 	Visibility Visibility `json:"visibility"`
 	// Primary language of this status. (ISO 639 Part 1 two-letter language code)

internal/db/db.go

@@ -284,6 +284,8 @@ type DB interface {
 	// It will use the given filters and try to return as many statuses up to the limit as possible.
 	GetHomeTimelineForAccount(accountID string, maxID string, sinceID string, minID string, limit int, local bool) ([]*gtsmodel.Status, error)
 
+	GetNotificationsForAccount(accountID string, limit int, maxID string) ([]*gtsmodel.Notification, error)
+
 	/*
 		USEFUL CONVERSION FUNCTIONS
 	*/

internal/db/pg/pg.go

@@ -1138,6 +1138,35 @@ func (ps *postgresService) GetHomeTimelineForAccount(accountID string, maxID str
 	return statuses, nil
 }
 
+func (ps *postgresService) GetNotificationsForAccount(accountID string, limit int, maxID string) ([]*gtsmodel.Notification, error) {
+	notifications := []*gtsmodel.Notification{}
+
+	q := ps.conn.Model(&notifications).Where("target_account_id = ?", accountID)
+
+
+	if maxID != "" {
+		n := &gtsmodel.Notification{}
+		if err := ps.conn.Model(n).Where("id = ?", maxID).Select(); err != nil {
+			return nil, err
+		}
+		q = q.Where("created_at < ?", n.CreatedAt)
+	}
+
+	if limit != 0 {
+		q = q.Limit(limit)
+	}
+
+	q = q.Order("created_at DESC")
+
+	if err := q.Select(); err != nil {
+		if err != pg.ErrNoRows {
+			return nil, err
+		}
+
+	}
+	return notifications, nil
+}
+
 /*
 	CONVERSION FUNCTIONS
 */

internal/federation/federatingdb/accept.go

@@ -0,0 +1,94 @@
+package federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (f *federatingDB) Accept(ctx context.Context, accept vocab.ActivityStreamsAccept) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Accept",
+			"asType": accept.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(accept)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+	l.Debugf("received ACCEPT asType %s", string(b))
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("ACCEPT: from federator channel wasn't set on context")
+		return nil
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("ACCEPT: from federator channel was set on context but couldn't be parsed")
+		return nil
+	}
+
+	inboxAcctI := ctx.Value(util.APAccount)
+	if inboxAcctI == nil {
+		l.Error("ACCEPT: inbox account wasn't set on context")
+		return nil
+	}
+	inboxAcct, ok := inboxAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("ACCEPT: inbox account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	acceptObject := accept.GetActivityStreamsObject()
+	if acceptObject == nil {
+		return errors.New("ACCEPT: no object set on vocab.ActivityStreamsAccept")
+	}
+
+	for iter := acceptObject.Begin(); iter != acceptObject.End(); iter = iter.Next() {
+		switch iter.GetType().GetTypeName() {
+		case string(gtsmodel.ActivityStreamsFollow):
+			// ACCEPT FOLLOW
+			asFollow, ok := iter.GetType().(vocab.ActivityStreamsFollow)
+			if !ok {
+				return errors.New("ACCEPT: couldn't parse follow into vocab.ActivityStreamsFollow")
+			}
+			// convert the follow to something we can understand
+			gtsFollow, err := f.typeConverter.ASFollowToFollow(asFollow)
+			if err != nil {
+				return fmt.Errorf("ACCEPT: error converting asfollow to gtsfollow: %s", err)
+			}
+			// make sure the addressee of the original follow is the same as whatever inbox this landed in
+			if gtsFollow.AccountID != inboxAcct.ID {
+				return errors.New("ACCEPT: follow object account and inbox account were not the same")
+			}
+			follow, err := f.db.AcceptFollowRequest(gtsFollow.AccountID, gtsFollow.TargetAccountID)
+			if err != nil {
+				return err
+			}
+
+			fromFederatorChan <- gtsmodel.FromFederator{
+				APObjectType:     gtsmodel.ActivityStreamsFollow,
+				APActivityType:   gtsmodel.ActivityStreamsAccept,
+				GTSModel:         follow,
+				ReceivingAccount: inboxAcct,
+			}
+
+			return nil
+		}
+	}
+
+	return nil
+}

internal/federation/federatingdb/create.go

@@ -0,0 +1,161 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Create adds a new entry to the database which must be able to be
+// keyed by its id.
+//
+// Note that Activity values received from federated peers may also be
+// created in the database this way if the Federating Protocol is
+// enabled. The client may freely decide to store only the id instead of
+// the entire value.
+//
+// The library makes this call only after acquiring a lock first.
+//
+// Under certain conditions and network activities, Create may be called
+// multiple times for the same ActivityStreams object.
+func (f *federatingDB) Create(ctx context.Context, asType vocab.Type) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Create",
+			"asType": asType.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(asType)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	l.Debugf("received CREATE asType %s", string(b))
+
+	targetAcctI := ctx.Value(util.APAccount)
+	if targetAcctI == nil {
+		l.Error("target account wasn't set on context")
+		return nil
+	}
+	targetAcct, ok := targetAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("target account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("from federator channel wasn't set on context")
+		return nil
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("from federator channel was set on context but couldn't be parsed")
+		return nil
+	}
+
+	switch asType.GetTypeName() {
+	case gtsmodel.ActivityStreamsCreate:
+		create, ok := asType.(vocab.ActivityStreamsCreate)
+		if !ok {
+			return errors.New("could not convert type to create")
+		}
+		object := create.GetActivityStreamsObject()
+		for objectIter := object.Begin(); objectIter != object.End(); objectIter = objectIter.Next() {
+			switch objectIter.GetType().GetTypeName() {
+			case gtsmodel.ActivityStreamsNote:
+				note := objectIter.GetActivityStreamsNote()
+				status, err := f.typeConverter.ASStatusToStatus(note)
+				if err != nil {
+					return fmt.Errorf("error converting note to status: %s", err)
+				}
+				if err := f.db.Put(status); err != nil {
+					if _, ok := err.(db.ErrAlreadyExists); ok {
+						return nil
+					}
+					return fmt.Errorf("database error inserting status: %s", err)
+				}
+
+				fromFederatorChan <- gtsmodel.FromFederator{
+					APObjectType:     gtsmodel.ActivityStreamsNote,
+					APActivityType:   gtsmodel.ActivityStreamsCreate,
+					GTSModel:         status,
+					ReceivingAccount: targetAcct,
+				}
+			}
+		}
+	case gtsmodel.ActivityStreamsFollow:
+		follow, ok := asType.(vocab.ActivityStreamsFollow)
+		if !ok {
+			return errors.New("could not convert type to follow")
+		}
+
+		followRequest, err := f.typeConverter.ASFollowToFollowRequest(follow)
+		if err != nil {
+			return fmt.Errorf("could not convert Follow to follow request: %s", err)
+		}
+
+		if err := f.db.Put(followRequest); err != nil {
+			return fmt.Errorf("database error inserting follow request: %s", err)
+		}
+
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsFollow,
+			APActivityType:   gtsmodel.ActivityStreamsCreate,
+			GTSModel:         followRequest,
+			ReceivingAccount: targetAcct,
+		}
+	case gtsmodel.ActivityStreamsLike:
+		like, ok := asType.(vocab.ActivityStreamsLike)
+		if !ok {
+			return errors.New("could not convert type to like")
+		}
+
+		fave, err := f.typeConverter.ASLikeToFave(like)
+		if err != nil {
+			return fmt.Errorf("could not convert Like to fave: %s", err)
+		}
+
+		if err := f.db.Put(fave); err != nil {
+			return fmt.Errorf("database error inserting fave: %s", err)
+		}
+
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsLike,
+			APActivityType:   gtsmodel.ActivityStreamsCreate,
+			GTSModel:         fave,
+			ReceivingAccount: targetAcct,
+		}
+	}
+	return nil
+}

internal/federation/federatingdb/db.go

@@ -0,0 +1,59 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"sync"
+
+	"github.com/go-fed/activity/pub"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+)
+
+// DB wraps the pub.Database interface with a couple of custom functions for GoToSocial.
+type DB interface {
+	pub.Database
+	Undo(ctx context.Context, undo vocab.ActivityStreamsUndo) error
+	Accept(ctx context.Context, accept vocab.ActivityStreamsAccept) error
+}
+
+// FederatingDB uses the underlying DB interface to implement the go-fed pub.Database interface.
+// It doesn't care what the underlying implementation of the DB interface is, as long as it works.
+type federatingDB struct {
+	locks         *sync.Map
+	db            db.DB
+	config        *config.Config
+	log           *logrus.Logger
+	typeConverter typeutils.TypeConverter
+}
+
+// New returns a DB interface using the given database, config, and logger.
+func New(db db.DB, config *config.Config, log *logrus.Logger) DB {
+	return &federatingDB{
+		locks:         new(sync.Map),
+		db:            db,
+		config:        config,
+		log:           log,
+		typeConverter: typeutils.NewConverter(config, db),
+	}
+}

internal/federation/federatingdb/delete.go

@@ -0,0 +1,86 @@
+package federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Delete removes the entry with the given id.
+//
+// Delete is only called for federated objects. Deletes from the Social
+// Protocol instead call Update to create a Tombstone.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Delete(ctx context.Context, id *url.URL) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "Delete",
+			"id":   id.String(),
+		},
+	)
+	l.Debugf("received DELETE id %s", id.String())
+
+	inboxAcctI := ctx.Value(util.APAccount)
+	if inboxAcctI == nil {
+		l.Error("inbox account wasn't set on context")
+		return nil
+	}
+	inboxAcct, ok := inboxAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("inbox account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("from federator channel wasn't set on context")
+		return nil
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("from federator channel was set on context but couldn't be parsed")
+		return nil
+	}
+
+	// in a delete we only get the URI, we can't know if we have a status or a profile or something else,
+	// so we have to try a few different things...
+	where := []db.Where{{Key: "uri", Value: id.String()}}
+
+	s := &gtsmodel.Status{}
+	if err := f.db.GetWhere(where, s); err == nil {
+		// it's a status
+		l.Debugf("uri is for status with id: %s", s.ID)
+		if err := f.db.DeleteByID(s.ID, &gtsmodel.Status{}); err != nil {
+			return fmt.Errorf("Delete: err deleting status: %s", err)
+		}
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsNote,
+			APActivityType:   gtsmodel.ActivityStreamsDelete,
+			GTSModel:         s,
+			ReceivingAccount: inboxAcct,
+		}
+	}
+
+	a := &gtsmodel.Account{}
+	if err := f.db.GetWhere(where, a); err == nil {
+		// it's an account
+		l.Debugf("uri is for an account with id: %s", s.ID)
+		if err := f.db.DeleteByID(a.ID, &gtsmodel.Account{}); err != nil {
+			return fmt.Errorf("Delete: err deleting account: %s", err)
+		}
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsProfile,
+			APActivityType:   gtsmodel.ActivityStreamsDelete,
+			GTSModel:         a,
+			ReceivingAccount: inboxAcct,
+		}
+	}
+
+	return nil
+}

internal/federation/federatingdb/exists.go

@@ -0,0 +1,24 @@
+package federatingdb
+
+import (
+	"context"
+	"net/url"
+
+	"github.com/sirupsen/logrus"
+)
+
+// Exists returns true if the database has an entry for the specified
+// id. It may not be owned by this application instance.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Exists(c context.Context, id *url.URL) (exists bool, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "Exists",
+			"id":   id.String(),
+		},
+	)
+	l.Debugf("entering EXISTS function with id %s", id.String())
+
+	return false, nil
+}

internal/federation/federatingdb/followers.go

@@ -0,0 +1,55 @@
+package federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Followers obtains the Followers Collection for an actor with the
+// given id.
+//
+// If modified, the library will then call Update.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Followers(c context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "Followers",
+			"actorIRI": actorIRI.String(),
+		},
+	)
+	l.Debugf("entering FOLLOWERS function with actorIRI %s", actorIRI.String())
+
+	acct := &gtsmodel.Account{}
+	if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: actorIRI.String()}}, acct); err != nil {
+		return nil, fmt.Errorf("db error getting account with uri %s: %s", actorIRI.String(), err)
+	}
+
+	acctFollowers := []gtsmodel.Follow{}
+	if err := f.db.GetFollowersByAccountID(acct.ID, &acctFollowers); err != nil {
+		return nil, fmt.Errorf("db error getting followers for account id %s: %s", acct.ID, err)
+	}
+
+	followers = streams.NewActivityStreamsCollection()
+	items := streams.NewActivityStreamsItemsProperty()
+	for _, follow := range acctFollowers {
+		gtsFollower := &gtsmodel.Account{}
+		if err := f.db.GetByID(follow.AccountID, gtsFollower); err != nil {
+			return nil, fmt.Errorf("db error getting account id %s: %s", follow.AccountID, err)
+		}
+		uri, err := url.Parse(gtsFollower.URI)
+		if err != nil {
+			return nil, fmt.Errorf("error parsing %s as url: %s", gtsFollower.URI, err)
+		}
+		items.AppendIRI(uri)
+	}
+	followers.SetActivityStreamsItems(items)
+	return
+}

internal/federation/federatingdb/following.go

@@ -0,0 +1,55 @@
+package federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Following obtains the Following Collection for an actor with the
+// given id.
+//
+// If modified, the library will then call Update.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Following(c context.Context, actorIRI *url.URL) (following vocab.ActivityStreamsCollection, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "Following",
+			"actorIRI": actorIRI.String(),
+		},
+	)
+	l.Debugf("entering FOLLOWING function with actorIRI %s", actorIRI.String())
+
+	acct := &gtsmodel.Account{}
+	if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: actorIRI.String()}}, acct); err != nil {
+		return nil, fmt.Errorf("db error getting account with uri %s: %s", actorIRI.String(), err)
+	}
+
+	acctFollowing := []gtsmodel.Follow{}
+	if err := f.db.GetFollowingByAccountID(acct.ID, &acctFollowing); err != nil {
+		return nil, fmt.Errorf("db error getting following for account id %s: %s", acct.ID, err)
+	}
+
+	following = streams.NewActivityStreamsCollection()
+	items := streams.NewActivityStreamsItemsProperty()
+	for _, follow := range acctFollowing {
+		gtsFollowing := &gtsmodel.Account{}
+		if err := f.db.GetByID(follow.AccountID, gtsFollowing); err != nil {
+			return nil, fmt.Errorf("db error getting account id %s: %s", follow.AccountID, err)
+		}
+		uri, err := url.Parse(gtsFollowing.URI)
+		if err != nil {
+			return nil, fmt.Errorf("error parsing %s as url: %s", gtsFollowing.URI, err)
+		}
+		items.AppendIRI(uri)
+	}
+	following.SetActivityStreamsItems(items)
+	return
+}

internal/federation/federatingdb/get.go

@@ -0,0 +1,83 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"errors"
+	"net/url"
+
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Get returns the database entry for the specified id.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Get(c context.Context, id *url.URL) (value vocab.Type, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "Get",
+			"id":   id.String(),
+		},
+	)
+	l.Debug("entering GET function")
+
+	if util.IsUserPath(id) {
+		acct := &gtsmodel.Account{}
+		if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: id.String()}}, acct); err != nil {
+			return nil, err
+		}
+		l.Debug("is user path! returning account")
+		return f.typeConverter.AccountToAS(acct)
+	}
+
+	if util.IsFollowersPath(id) {
+		acct := &gtsmodel.Account{}
+		if err := f.db.GetWhere([]db.Where{{Key: "followers_uri", Value: id.String()}}, acct); err != nil {
+			return nil, err
+		}
+
+		followersURI, err := url.Parse(acct.FollowersURI)
+		if err != nil {
+			return nil, err
+		}
+
+		return f.Followers(c, followersURI)
+	}
+
+	if util.IsFollowingPath(id) {
+		acct := &gtsmodel.Account{}
+		if err := f.db.GetWhere([]db.Where{{Key: "following_uri", Value: id.String()}}, acct); err != nil {
+			return nil, err
+		}
+
+		followingURI, err := url.Parse(acct.FollowingURI)
+		if err != nil {
+			return nil, err
+		}
+
+		return f.Following(c, followingURI)
+	}
+
+	return nil, errors.New("could not get")
+}

internal/federation/federatingdb/inbox.go

@@ -0,0 +1,73 @@
+package federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/go-fed/activity/pub"
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// InboxContains returns true if the OrderedCollection at 'inbox'
+// contains the specified 'id'.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) InboxContains(c context.Context, inbox, id *url.URL) (contains bool, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "InboxContains",
+			"id":   id.String(),
+		},
+	)
+	l.Debugf("entering INBOXCONTAINS function with for inbox %s and id %s", inbox.String(), id.String())
+
+	if !util.IsInboxPath(inbox) {
+		return false, fmt.Errorf("%s is not an inbox URI", inbox.String())
+	}
+
+	activityI := c.Value(util.APActivity)
+	if activityI == nil {
+		return false, fmt.Errorf("no activity was set for id %s", id.String())
+	}
+	activity, ok := activityI.(pub.Activity)
+	if !ok || activity == nil {
+		return false, fmt.Errorf("could not parse contextual activity for id %s", id.String())
+	}
+
+	l.Debugf("activity type %s for id %s", activity.GetTypeName(), id.String())
+
+	return false, nil
+}
+
+// GetInbox returns the first ordered collection page of the outbox at
+// the specified IRI, for prepending new items.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) GetInbox(c context.Context, inboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "GetInbox",
+		},
+	)
+	l.Debugf("entering GETINBOX function with inboxIRI %s", inboxIRI.String())
+	return streams.NewActivityStreamsOrderedCollectionPage(), nil
+}
+
+// SetInbox saves the inbox value given from GetInbox, with new items
+// prepended. Note that the new items must not be added as independent
+// database entries. Separate calls to Create will do that.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) SetInbox(c context.Context, inbox vocab.ActivityStreamsOrderedCollectionPage) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "SetInbox",
+		},
+	)
+	l.Debug("entering SETINBOX function")
+	return nil
+}

internal/federation/federatingdb/liked.go

@@ -0,0 +1,26 @@
+package federatingdb
+
+import (
+	"context"
+	"net/url"
+
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+)
+
+// Liked obtains the Liked Collection for an actor with the
+// given id.
+//
+// If modified, the library will then call Update.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Liked(c context.Context, actorIRI *url.URL) (liked vocab.ActivityStreamsCollection, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "Liked",
+			"actorIRI": actorIRI.String(),
+		},
+	)
+	l.Debugf("entering LIKED function with actorIRI %s", actorIRI.String())
+	return nil, nil
+}

internal/federation/federatingdb/lock.go

@@ -0,0 +1,70 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"errors"
+	"net/url"
+	"sync"
+)
+
+// Lock takes a lock for the object at the specified id. If an error
+// is returned, the lock must not have been taken.
+//
+// The lock must be able to succeed for an id that does not exist in
+// the database. This means acquiring the lock does not guarantee the
+// entry exists in the database.
+//
+// Locks are encouraged to be lightweight and in the Go layer, as some
+// processes require tight loops acquiring and releasing locks.
+//
+// Used to ensure race conditions in multiple requests do not occur.
+func (f *federatingDB) Lock(c context.Context, id *url.URL) error {
+	// Before any other Database methods are called, the relevant `id`
+	// entries are locked to allow for fine-grained concurrency.
+
+	// Strategy: create a new lock, if stored, continue. Otherwise, lock the
+	// existing mutex.
+	mu := &sync.Mutex{}
+	mu.Lock() // Optimistically lock if we do store it.
+	i, loaded := f.locks.LoadOrStore(id.String(), mu)
+	if loaded {
+		mu = i.(*sync.Mutex)
+		mu.Lock()
+	}
+	return nil
+}
+
+// Unlock makes the lock for the object at the specified id available.
+// If an error is returned, the lock must have still been freed.
+//
+// Used to ensure race conditions in multiple requests do not occur.
+func (f *federatingDB) Unlock(c context.Context, id *url.URL) error {
+	// Once Go-Fed is done calling Database methods, the relevant `id`
+	// entries are unlocked.
+
+	i, ok := f.locks.Load(id.String())
+	if !ok {
+		return errors.New("missing an id in unlock")
+	}
+	mu := i.(*sync.Mutex)
+	mu.Unlock()
+	return nil
+}

internal/federation/federatingdb/outbox.go

@@ -0,0 +1,71 @@
+package federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// GetOutbox returns the first ordered collection page of the outbox
+// at the specified IRI, for prepending new items.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) GetOutbox(c context.Context, outboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "GetOutbox",
+		},
+	)
+	l.Debug("entering GETOUTBOX function")
+
+	return streams.NewActivityStreamsOrderedCollectionPage(), nil
+}
+
+// SetOutbox saves the outbox value given from GetOutbox, with new items
+// prepended. Note that the new items must not be added as independent
+// database entries. Separate calls to Create will do that.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) SetOutbox(c context.Context, outbox vocab.ActivityStreamsOrderedCollectionPage) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "SetOutbox",
+		},
+	)
+	l.Debug("entering SETOUTBOX function")
+
+	return nil
+}
+
+// OutboxForInbox fetches the corresponding actor's outbox IRI for the
+// actor's inbox IRI.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) OutboxForInbox(c context.Context, inboxIRI *url.URL) (outboxIRI *url.URL, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "OutboxForInbox",
+			"inboxIRI": inboxIRI.String(),
+		},
+	)
+	l.Debugf("entering OUTBOXFORINBOX function with inboxIRI %s", inboxIRI.String())
+
+	if !util.IsInboxPath(inboxIRI) {
+		return nil, fmt.Errorf("%s is not an inbox URI", inboxIRI.String())
+	}
+	acct := &gtsmodel.Account{}
+	if err := f.db.GetWhere([]db.Where{{Key: "inbox_uri", Value: inboxIRI.String()}}, acct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, fmt.Errorf("no actor found that corresponds to inbox %s", inboxIRI.String())
+		}
+		return nil, fmt.Errorf("db error searching for actor with inbox %s", inboxIRI.String())
+	}
+	return url.Parse(acct.OutboxURI)
+}

internal/federation/federatingdb/owns.go

@@ -0,0 +1,123 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Owns returns true if the IRI belongs to this instance, and if
+// the database has an entry for the IRI.
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Owns(c context.Context, id *url.URL) (bool, error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "Owns",
+			"id":   id.String(),
+		},
+	)
+	l.Debugf("entering OWNS function with id %s", id.String())
+
+	// if the id host isn't this instance host, we don't own this IRI
+	if id.Host != f.config.Host {
+		l.Debugf("we DO NOT own activity because the host is %s not %s", id.Host, f.config.Host)
+		return false, nil
+	}
+
+	// apparently it belongs to this host, so what *is* it?
+
+	// check if it's a status, eg /users/example_username/statuses/SOME_UUID_OF_A_STATUS
+	if util.IsStatusesPath(id) {
+		_, uid, err := util.ParseStatusesPath(id)
+		if err != nil {
+			return false, fmt.Errorf("error parsing statuses path for url %s: %s", id.String(), err)
+		}
+		if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: uid}}, &gtsmodel.Status{}); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// there are no entries for this status
+				return false, nil
+			}
+			// an actual error happened
+			return false, fmt.Errorf("database error fetching status with id %s: %s", uid, err)
+		}
+		l.Debug("we DO own this")
+		return true, nil
+	}
+
+	// check if it's a user, eg /users/example_username
+	if util.IsUserPath(id) {
+		username, err := util.ParseUserPath(id)
+		if err != nil {
+			return false, fmt.Errorf("error parsing statuses path for url %s: %s", id.String(), err)
+		}
+		if err := f.db.GetLocalAccountByUsername(username, &gtsmodel.Account{}); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// there are no entries for this username
+				return false, nil
+			}
+			// an actual error happened
+			return false, fmt.Errorf("database error fetching account with username %s: %s", username, err)
+		}
+		l.Debug("we DO own this")
+		return true, nil
+	}
+
+	if util.IsFollowersPath(id) {
+		username, err := util.ParseFollowersPath(id)
+		if err != nil {
+			return false, fmt.Errorf("error parsing statuses path for url %s: %s", id.String(), err)
+		}
+		if err := f.db.GetLocalAccountByUsername(username, &gtsmodel.Account{}); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// there are no entries for this username
+				return false, nil
+			}
+			// an actual error happened
+			return false, fmt.Errorf("database error fetching account with username %s: %s", username, err)
+		}
+		l.Debug("we DO own this")
+		return true, nil
+	}
+
+	if util.IsFollowingPath(id) {
+		username, err := util.ParseFollowingPath(id)
+		if err != nil {
+			return false, fmt.Errorf("error parsing statuses path for url %s: %s", id.String(), err)
+		}
+		if err := f.db.GetLocalAccountByUsername(username, &gtsmodel.Account{}); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// there are no entries for this username
+				return false, nil
+			}
+			// an actual error happened
+			return false, fmt.Errorf("database error fetching account with username %s: %s", username, err)
+		}
+		l.Debug("we DO own this")
+		return true, nil
+	}
+
+	return false, fmt.Errorf("could not match activityID: %s", id.String())
+}

internal/federation/federatingdb/undo.go

@@ -0,0 +1,89 @@
+package federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (f *federatingDB) Undo(ctx context.Context, undo vocab.ActivityStreamsUndo) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Undo",
+			"asType": undo.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(undo)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+	l.Debugf("received UNDO asType %s", string(b))
+
+	targetAcctI := ctx.Value(util.APAccount)
+	if targetAcctI == nil {
+		l.Error("UNDO: target account wasn't set on context")
+		return nil
+	}
+	targetAcct, ok := targetAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("UNDO: target account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	undoObject := undo.GetActivityStreamsObject()
+	if undoObject == nil {
+		return errors.New("UNDO: no object set on vocab.ActivityStreamsUndo")
+	}
+
+	for iter := undoObject.Begin(); iter != undoObject.End(); iter = iter.Next() {
+		switch iter.GetType().GetTypeName() {
+		case string(gtsmodel.ActivityStreamsFollow):
+			// UNDO FOLLOW
+			ASFollow, ok := iter.GetType().(vocab.ActivityStreamsFollow)
+			if !ok {
+				return errors.New("UNDO: couldn't parse follow into vocab.ActivityStreamsFollow")
+			}
+			// make sure the actor owns the follow
+			if !sameActor(undo.GetActivityStreamsActor(), ASFollow.GetActivityStreamsActor()) {
+				return errors.New("UNDO: follow actor and activity actor not the same")
+			}
+			// convert the follow to something we can understand
+			gtsFollow, err := f.typeConverter.ASFollowToFollow(ASFollow)
+			if err != nil {
+				return fmt.Errorf("UNDO: error converting asfollow to gtsfollow: %s", err)
+			}
+			// make sure the addressee of the original follow is the same as whatever inbox this landed in
+			if gtsFollow.TargetAccountID != targetAcct.ID {
+				return errors.New("UNDO: follow object account and inbox account were not the same")
+			}
+			// delete any existing FOLLOW
+			if err := f.db.DeleteWhere([]db.Where{{Key: "uri", Value: gtsFollow.URI}}, &gtsmodel.Follow{}); err != nil {
+				return fmt.Errorf("UNDO: db error removing follow: %s", err)
+			}
+			// delete any existing FOLLOW REQUEST
+			if err := f.db.DeleteWhere([]db.Where{{Key: "uri", Value: gtsFollow.URI}}, &gtsmodel.FollowRequest{}); err != nil {
+				return fmt.Errorf("UNDO: db error removing follow request: %s", err)
+			}
+			l.Debug("follow undone")
+			return nil
+		case string(gtsmodel.ActivityStreamsLike):
+			// UNDO LIKE
+		case string(gtsmodel.ActivityStreamsAnnounce):
+			// UNDO BOOST/REBLOG/ANNOUNCE
+		}
+	}
+
+	return nil
+}

internal/federation/federatingdb/update.go

@@ -0,0 +1,142 @@
+package federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Update sets an existing entry to the database based on the value's
+// id.
+//
+// Note that Activity values received from federated peers may also be
+// updated in the database this way if the Federating Protocol is
+// enabled. The client may freely decide to store only the id instead of
+// the entire value.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) Update(ctx context.Context, asType vocab.Type) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Update",
+			"asType": asType.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(asType)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	l.Debugf("received UPDATE asType %s", string(b))
+
+	receivingAcctI := ctx.Value(util.APAccount)
+	if receivingAcctI == nil {
+		l.Error("receiving account wasn't set on context")
+	}
+	receivingAcct, ok := receivingAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("receiving account was set on context but couldn't be parsed")
+	}
+
+	requestingAcctI := ctx.Value(util.APRequestingAccount)
+	if receivingAcctI == nil {
+		l.Error("requesting account wasn't set on context")
+	}
+	requestingAcct, ok := requestingAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("requesting account was set on context but couldn't be parsed")
+	}
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("from federator channel wasn't set on context")
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("from federator channel was set on context but couldn't be parsed")
+	}
+
+	typeName := asType.GetTypeName()
+	if typeName == gtsmodel.ActivityStreamsApplication ||
+		typeName == gtsmodel.ActivityStreamsGroup ||
+		typeName == gtsmodel.ActivityStreamsOrganization ||
+		typeName == gtsmodel.ActivityStreamsPerson ||
+		typeName == gtsmodel.ActivityStreamsService {
+		// it's an UPDATE to some kind of account
+		var accountable typeutils.Accountable
+
+		switch asType.GetTypeName() {
+		case gtsmodel.ActivityStreamsApplication:
+			l.Debug("got update for APPLICATION")
+			i, ok := asType.(vocab.ActivityStreamsApplication)
+			if !ok {
+				return errors.New("could not convert type to application")
+			}
+			accountable = i
+		case gtsmodel.ActivityStreamsGroup:
+			l.Debug("got update for GROUP")
+			i, ok := asType.(vocab.ActivityStreamsGroup)
+			if !ok {
+				return errors.New("could not convert type to group")
+			}
+			accountable = i
+		case gtsmodel.ActivityStreamsOrganization:
+			l.Debug("got update for ORGANIZATION")
+			i, ok := asType.(vocab.ActivityStreamsOrganization)
+			if !ok {
+				return errors.New("could not convert type to organization")
+			}
+			accountable = i
+		case gtsmodel.ActivityStreamsPerson:
+			l.Debug("got update for PERSON")
+			i, ok := asType.(vocab.ActivityStreamsPerson)
+			if !ok {
+				return errors.New("could not convert type to person")
+			}
+			accountable = i
+		case gtsmodel.ActivityStreamsService:
+			l.Debug("got update for SERVICE")
+			i, ok := asType.(vocab.ActivityStreamsService)
+			if !ok {
+				return errors.New("could not convert type to service")
+			}
+			accountable = i
+		}
+
+		updatedAcct, err := f.typeConverter.ASRepresentationToAccount(accountable, true)
+		if err != nil {
+			return fmt.Errorf("error converting to account: %s", err)
+		}
+
+		if requestingAcct.URI != updatedAcct.URI {
+			return fmt.Errorf("update for account %s was requested by account %s, this is not valid", updatedAcct.URI, requestingAcct.URI)
+		}
+
+		updatedAcct.ID = requestingAcct.ID // set this here so the db will update properly instead of trying to PUT this and getting constraint issues
+		if err := f.db.UpdateByID(requestingAcct.ID, updatedAcct); err != nil {
+			return fmt.Errorf("database error inserting updated account: %s", err)
+		}
+
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsProfile,
+			APActivityType:   gtsmodel.ActivityStreamsUpdate,
+			GTSModel:         updatedAcct,
+			ReceivingAccount: receivingAcct,
+		}
+
+	}
+
+	return nil
+}

internal/federation/federatingdb/util.go

@@ -0,0 +1,187 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/url"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func sameActor(activityActor vocab.ActivityStreamsActorProperty, followActor vocab.ActivityStreamsActorProperty) bool {
+	if activityActor == nil || followActor == nil {
+		return false
+	}
+	for aIter := activityActor.Begin(); aIter != activityActor.End(); aIter = aIter.Next() {
+		for fIter := followActor.Begin(); fIter != followActor.End(); fIter = fIter.Next() {
+			if aIter.GetIRI() == nil {
+				return false
+			}
+			if fIter.GetIRI() == nil {
+				return false
+			}
+			if aIter.GetIRI().String() == fIter.GetIRI().String() {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// NewID creates a new IRI id for the provided activity or object. The
+// implementation does not need to set the 'id' property and simply
+// needs to determine the value.
+//
+// The go-fed library will handle setting the 'id' property on the
+// activity or object provided with the value returned.
+func (f *federatingDB) NewID(c context.Context, t vocab.Type) (id *url.URL, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "NewID",
+			"asType": t.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(t)
+	if err != nil {
+		return nil, err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return nil, err
+	}
+	l.Debugf("received NEWID request for asType %s", string(b))
+
+	switch t.GetTypeName() {
+	case gtsmodel.ActivityStreamsFollow:
+		// FOLLOW
+		// ID might already be set on a follow we've created, so check it here and return it if it is
+		follow, ok := t.(vocab.ActivityStreamsFollow)
+		if !ok {
+			return nil, errors.New("newid: follow couldn't be parsed into vocab.ActivityStreamsFollow")
+		}
+		idProp := follow.GetJSONLDId()
+		if idProp != nil {
+			if idProp.IsIRI() {
+				return idProp.GetIRI(), nil
+			}
+		}
+		// it's not set so create one based on the actor set on the follow (ie., the followER not the followEE)
+		actorProp := follow.GetActivityStreamsActor()
+		if actorProp != nil {
+			for iter := actorProp.Begin(); iter != actorProp.End(); iter = iter.Next() {
+				// take the IRI of the first actor we can find (there should only be one)
+				if iter.IsIRI() {
+					actorAccount := &gtsmodel.Account{}
+					if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: iter.GetIRI().String()}}, actorAccount); err == nil { // if there's an error here, just use the fallback behavior -- we don't need to return an error here
+						return url.Parse(util.GenerateURIForFollow(actorAccount.Username, f.config.Protocol, f.config.Host, uuid.NewString()))
+					}
+				}
+			}
+		}
+	case gtsmodel.ActivityStreamsNote:
+		// NOTE aka STATUS
+		// ID might already be set on a note we've created, so check it here and return it if it is
+		note, ok := t.(vocab.ActivityStreamsNote)
+		if !ok {
+			return nil, errors.New("newid: note couldn't be parsed into vocab.ActivityStreamsNote")
+		}
+		idProp := note.GetJSONLDId()
+		if idProp != nil {
+			if idProp.IsIRI() {
+				return idProp.GetIRI(), nil
+			}
+		}
+	case gtsmodel.ActivityStreamsLike:
+		// LIKE aka FAVE
+		// ID might already be set on a fave we've created, so check it here and return it if it is
+		fave, ok := t.(vocab.ActivityStreamsLike)
+		if !ok {
+			return nil, errors.New("newid: fave couldn't be parsed into vocab.ActivityStreamsLike")
+		}
+		idProp := fave.GetJSONLDId()
+		if idProp != nil {
+			if idProp.IsIRI() {
+				return idProp.GetIRI(), nil
+			}
+		}
+	}
+
+	// fallback default behavior: just return a random UUID after our protocol and host
+	return url.Parse(fmt.Sprintf("%s://%s/%s", f.config.Protocol, f.config.Host, uuid.NewString()))
+}
+
+// ActorForOutbox fetches the actor's IRI for the given outbox IRI.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) ActorForOutbox(c context.Context, outboxIRI *url.URL) (actorIRI *url.URL, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "ActorForOutbox",
+			"inboxIRI": outboxIRI.String(),
+		},
+	)
+	l.Debugf("entering ACTORFOROUTBOX function with outboxIRI %s", outboxIRI.String())
+
+	if !util.IsOutboxPath(outboxIRI) {
+		return nil, fmt.Errorf("%s is not an outbox URI", outboxIRI.String())
+	}
+	acct := &gtsmodel.Account{}
+	if err := f.db.GetWhere([]db.Where{{Key: "outbox_uri", Value: outboxIRI.String()}}, acct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, fmt.Errorf("no actor found that corresponds to outbox %s", outboxIRI.String())
+		}
+		return nil, fmt.Errorf("db error searching for actor with outbox %s", outboxIRI.String())
+	}
+	return url.Parse(acct.URI)
+}
+
+// ActorForInbox fetches the actor's IRI for the given outbox IRI.
+//
+// The library makes this call only after acquiring a lock first.
+func (f *federatingDB) ActorForInbox(c context.Context, inboxIRI *url.URL) (actorIRI *url.URL, err error) {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":     "ActorForInbox",
+			"inboxIRI": inboxIRI.String(),
+		},
+	)
+	l.Debugf("entering ACTORFORINBOX function with inboxIRI %s", inboxIRI.String())
+
+	if !util.IsInboxPath(inboxIRI) {
+		return nil, fmt.Errorf("%s is not an inbox URI", inboxIRI.String())
+	}
+	acct := &gtsmodel.Account{}
+	if err := f.db.GetWhere([]db.Where{{Key: "inbox_uri", Value: inboxIRI.String()}}, acct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, fmt.Errorf("no actor found that corresponds to inbox %s", inboxIRI.String())
+		}
+		return nil, fmt.Errorf("db error searching for actor with inbox %s", inboxIRI.String())
+	}
+	return url.Parse(acct.URI)
+}

internal/federation/federatingprotocol.go

@@ -240,38 +240,20 @@ func (f *federator) Blocked(ctx context.Context, actorIRIs []*url.URL) (bool, er
 // Applications are not expected to handle every single ActivityStreams
 // type and extension. The unhandled ones are passed to DefaultCallback.
 func (f *federator) FederatingCallbacks(ctx context.Context) (wrapped pub.FederatingWrappedCallbacks, other []interface{}, err error) {
-	l := f.log.WithFields(logrus.Fields{
-		"func": "FederatingCallbacks",
-	})
-
-	receivingAcctI := ctx.Value(util.APAccount)
-	if receivingAcctI == nil {
-		l.Error("receiving account wasn't set on context")
-		return
-	}
-	receivingAcct, ok := receivingAcctI.(*gtsmodel.Account)
-	if !ok {
-		l.Error("receiving account was set on context but couldn't be parsed")
-		return
-	}
-
-	var onFollow pub.OnFollowBehavior = pub.OnFollowAutomaticallyAccept
-	if receivingAcct.Locked {
-		onFollow = pub.OnFollowDoNothing
-	}
-
 	wrapped = pub.FederatingWrappedCallbacks{
 		// OnFollow determines what action to take for this particular callback
 		// if a Follow Activity is handled.
-		OnFollow: onFollow,
+		//
+		// For our implementation, we always want to do nothing because we have internal logic for handling follows.
+		OnFollow: pub.OnFollowDoNothing,
 	}
 
 	other = []interface{}{
-		// override default undo behavior
+		// override default undo behavior and trigger our own side effects
 		func(ctx context.Context, undo vocab.ActivityStreamsUndo) error {
 			return f.FederatingDB().Undo(ctx, undo)
 		},
-		// override default accept behavior
+		// override default accept behavior and trigger our own side effects
 		func(ctx context.Context, accept vocab.ActivityStreamsAccept) error {
 			return f.FederatingDB().Accept(ctx, accept)
 		},

internal/federation/federator.go

@@ -26,6 +26,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/federation/federatingdb"
 	"github.com/superseriousbusiness/gotosocial/internal/transport"
 	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 )
@@ -35,7 +36,7 @@ type Federator interface {
 	// FederatingActor returns the underlying pub.FederatingActor, which can be used to send activities, and serve actors at inboxes/outboxes.
 	FederatingActor() pub.FederatingActor
 	// FederatingDB returns the underlying FederatingDB interface.
-	FederatingDB() FederatingDB
+	FederatingDB() federatingdb.DB
 	// AuthenticateFederatedRequest can be used to check the authenticity of incoming http-signed requests for federating resources.
 	// The given username will be used to create a transport for making outgoing requests. See the implementation for more detailed comments.
 	AuthenticateFederatedRequest(username string, r *http.Request) (*url.URL, error)
@@ -54,7 +55,7 @@ type Federator interface {
 type federator struct {
 	config              *config.Config
 	db                  db.DB
-	federatingDB        FederatingDB
+	federatingDB        federatingdb.DB
 	clock               pub.Clock
 	typeConverter       typeutils.TypeConverter
 	transportController transport.Controller
@@ -63,7 +64,7 @@ type federator struct {
 }
 
 // NewFederator returns a new federator
-func NewFederator(db db.DB, federatingDB FederatingDB, transportController transport.Controller, config *config.Config, log *logrus.Logger, typeConverter typeutils.TypeConverter) Federator {
+func NewFederator(db db.DB, federatingDB federatingdb.DB, transportController transport.Controller, config *config.Config, log *logrus.Logger, typeConverter typeutils.TypeConverter) Federator {
 
 	clock := &Clock{}
 	f := &federator{
@@ -84,6 +85,6 @@ func (f *federator) FederatingActor() pub.FederatingActor {
 	return f.actor
 }
 
-func (f *federator) FederatingDB() FederatingDB {
+func (f *federator) FederatingDB() federatingdb.DB {
 	return f.federatingDB
 }

internal/federation/util.go

@@ -280,22 +280,4 @@ func (f *federator) GetTransportForUser(username string) (transport.Transport, e
 	return transport, nil
 }
 
-func sameActor(activityActor vocab.ActivityStreamsActorProperty, followActor vocab.ActivityStreamsActorProperty) bool {
-	if activityActor == nil || followActor == nil {
-		return false
-	}
-	for aIter := activityActor.Begin(); aIter != activityActor.End(); aIter = aIter.Next() {
-		for fIter := followActor.Begin(); fIter != followActor.End(); fIter = fIter.Next() {
-			if aIter.GetIRI() == nil {
-				return false
-			}
-			if fIter.GetIRI() == nil {
-				return false
-			}
-			if aIter.GetIRI().String() == fIter.GetIRI().String() {
-				return true
-			}
-		}
-	}
-	return false
-}
+

internal/gotosocial/actions.go

@@ -37,6 +37,7 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/followrequest"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/instance"
 	mediaModule "github.com/superseriousbusiness/gotosocial/internal/api/client/media"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/notification"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/status"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/timeline"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/user"
@@ -45,6 +46,7 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db/pg"
 	"github.com/superseriousbusiness/gotosocial/internal/federation"
+	"github.com/superseriousbusiness/gotosocial/internal/federation/federatingdb"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/message"
@@ -73,6 +75,7 @@ var models []interface{} = []interface{}{
 	&gtsmodel.User{},
 	&gtsmodel.Emoji{},
 	&gtsmodel.Instance{},
+	&gtsmodel.Notification{},
 	&oauth.Token{},
 	&oauth.Client{},
 }
@@ -84,7 +87,7 @@ var Run action.GTSAction = func(ctx context.Context, c *config.Config, log *logr
 		return fmt.Errorf("error creating dbservice: %s", err)
 	}
 
-	federatingDB := federation.NewFederatingDB(dbService, c, log)
+	federatingDB := federatingdb.New(dbService, c, log)
 
 	router, err := router.New(c, log)
 	if err != nil {
@@ -118,6 +121,7 @@ var Run action.GTSAction = func(ctx context.Context, c *config.Config, log *logr
 	webfingerModule := webfinger.New(c, processor, log)
 	usersModule := user.New(c, processor, log)
 	timelineModule := timeline.New(c, processor, log)
+	notificationModule := notification.New(c, processor, log)
 	mm := mediaModule.New(c, processor, log)
 	fileServerModule := fileserver.New(c, processor, log)
 	adminModule := admin.New(c, processor, log)
@@ -141,6 +145,7 @@ var Run action.GTSAction = func(ctx context.Context, c *config.Config, log *logr
 		webfingerModule,
 		usersModule,
 		timelineModule,
+		notificationModule,
 	}
 
 	for _, m := range apis {

internal/gtsmodel/notification.go

@@ -0,0 +1,70 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   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 gtsmodel
+
+import "time"
+
+// Notification models an alert/notification sent to an account about something like a reblog, like, new follow request, etc.
+type Notification struct {
+	// ID of this notification in the database
+	ID string `pg:"type:uuid,default:gen_random_uuid(),pk,notnull"`
+	// Type of this notification
+	NotificationType NotificationType `pg:",notnull"`
+	// Creation time of this notification
+	CreatedAt time.Time `pg:"type:timestamp,notnull,default:now()"`
+	// Which account does this notification target (ie., who will receive the notification?)
+	TargetAccountID string `pg:",notnull"`
+	// Which account performed the action that created this notification?
+	OriginAccountID string `pg:",notnull"`
+	// If the notification pertains to a status, what is the database ID of that status?
+	StatusID string
+	// Has this notification been read already?
+	Read bool
+
+	/*
+		NON-DATABASE fields
+	*/
+
+	// gts model of the target account, won't be put in the database, it's just for convenience when passing the notification around.
+	GTSTargetAccount *Account `pg:"-"`
+	// gts model of the origin account, won't be put in the database, it's just for convenience when passing the notification around.
+	GTSOriginAccount *Account `pg:"-"`
+	// gts model of the relevant status, won't be put in the database, it's just for convenience when passing the notification around.
+	GTSStatus *Status `pg:"-"`
+}
+
+// NotificationType describes the reason/type of this notification.
+type NotificationType string
+
+const (
+	// NotificationFollow -- someone followed you
+	NotificationFollow NotificationType = "follow"
+	// NotificationFollowRequest -- someone requested to follow you
+	NotificationFollowRequest NotificationType = "follow_request"
+	// NotificationMention -- someone mentioned you in their status
+	NotificationMention NotificationType = "mention"
+	// NotificationReblog -- someone boosted one of your statuses
+	NotificationReblog NotificationType = "reblog"
+	// NotifiationFave -- someone faved/liked one of your statuses
+	NotificationFave NotificationType = "favourite"
+	// NotificationPoll -- a poll you voted in or created has ended
+	NotificationPoll NotificationType = "poll"
+	// NotificationStatus -- someone you enabled notifications for has posted a status.
+	NotificationStatus NotificationType = "status"
+)

internal/gtsmodel/status.go

@@ -80,7 +80,7 @@ type Status struct {
 	*/
 
 	// Account that created this status
-	GTSAccount *Account `pg:"-"`
+	GTSAuthorAccount *Account `pg:"-"`
 	// Mentions created in this status
 	GTSMentions []*Mention `pg:"-"`
 	// Hashtags used in this status

internal/message/fromclientapiprocess.go

@@ -49,17 +49,17 @@ func (p *processor) processFromClientAPI(clientMsg gtsmodel.FromClientAPI) error
 			}
 			return nil
 		case gtsmodel.ActivityStreamsFollow:
-			// CREATE FOLLOW (request)
-			follow, ok := clientMsg.GTSModel.(*gtsmodel.Follow)
+			// CREATE FOLLOW REQUEST
+			followRequest, ok := clientMsg.GTSModel.(*gtsmodel.FollowRequest)
 			if !ok {
-				return errors.New("follow was not parseable as *gtsmodel.Follow")
+				return errors.New("followrequest was not parseable as *gtsmodel.FollowRequest")
 			}
 
-			if err := p.notifyFollow(follow); err != nil {
+			if err := p.notifyFollowRequest(followRequest, clientMsg.TargetAccount); err != nil {
 				return err
 			}
 
-			return p.federateFollow(follow, clientMsg.OriginAccount, clientMsg.TargetAccount)
+			return p.federateFollow(followRequest, clientMsg.OriginAccount, clientMsg.TargetAccount)
 		case gtsmodel.ActivityStreamsLike:
 			// CREATE LIKE/FAVE
 			fave, ok := clientMsg.GTSModel.(*gtsmodel.StatusFave)
@@ -67,7 +67,7 @@ func (p *processor) processFromClientAPI(clientMsg gtsmodel.FromClientAPI) error
 				return errors.New("fave was not parseable as *gtsmodel.StatusFave")
 			}
 
-			if err := p.notifyFave(fave); err != nil {
+			if err := p.notifyFave(fave, clientMsg.TargetAccount); err != nil {
 				return err
 			}
 
@@ -84,6 +84,11 @@ func (p *processor) processFromClientAPI(clientMsg gtsmodel.FromClientAPI) error
 			if !ok {
 				return errors.New("accept was not parseable as *gtsmodel.Follow")
 			}
+
+			if err := p.notifyFollow(follow, clientMsg.TargetAccount); err != nil {
+				return err
+			}
+
 			return p.federateAcceptFollowRequest(follow, clientMsg.OriginAccount, clientMsg.TargetAccount)
 		}
 	case gtsmodel.ActivityStreamsUndo:
@@ -107,21 +112,23 @@ func (p *processor) federateStatus(status *gtsmodel.Status) error {
 		return fmt.Errorf("federateStatus: error converting status to as format: %s", err)
 	}
 
-	outboxIRI, err := url.Parse(status.GTSAccount.OutboxURI)
+	outboxIRI, err := url.Parse(status.GTSAuthorAccount.OutboxURI)
 	if err != nil {
-		return fmt.Errorf("federateStatus: error parsing outboxURI %s: %s", status.GTSAccount.OutboxURI, err)
+		return fmt.Errorf("federateStatus: error parsing outboxURI %s: %s", status.GTSAuthorAccount.OutboxURI, err)
 	}
 
 	_, err = p.federator.FederatingActor().Send(context.Background(), outboxIRI, asStatus)
 	return err
 }
 
-func (p *processor) federateFollow(follow *gtsmodel.Follow, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
+func (p *processor) federateFollow(followRequest *gtsmodel.FollowRequest, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
 	// if both accounts are local there's nothing to do here
 	if originAccount.Domain == "" && targetAccount.Domain == "" {
 		return nil
 	}
 
+	follow := p.tc.FollowRequestToFollow(followRequest)
+
 	asFollow, err := p.tc.FollowToAS(follow, originAccount, targetAccount)
 	if err != nil {
 		return fmt.Errorf("federateFollow: error converting follow to as format: %s", err)

internal/message/fromcommonprocess.go

@@ -18,16 +18,143 @@
 
 package message
 
-import "github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+import (
+	"fmt"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
 
 func (p *processor) notifyStatus(status *gtsmodel.Status) error {
+	// if there are no mentions in this status then just bail
+	if len(status.Mentions) == 0 {
+		return nil
+	}
+
+	if status.GTSMentions == nil {
+		// there are mentions but they're not fully populated on the status yet so do this
+		menchies := []*gtsmodel.Mention{}
+		for _, m := range status.Mentions {
+			gtsm := &gtsmodel.Mention{}
+			if err := p.db.GetByID(m, gtsm); err != nil {
+				return fmt.Errorf("notifyStatus: error getting mention with id %s from the db: %s", m, err)
+			}
+			menchies = append(menchies, gtsm)
+		}
+		status.GTSMentions = menchies
+	}
+
+	// now we have mentions as full gtsmodel.Mention structs on the status we can continue
+	for _, m := range status.GTSMentions {
+		// make sure this is a local account, otherwise we don't need to create a notification for it
+		if m.GTSAccount == nil {
+			a := &gtsmodel.Account{}
+			if err := p.db.GetByID(m.TargetAccountID, a); err != nil {
+				// we don't have the account or there's been an error
+				return fmt.Errorf("notifyStatus: error getting account with id %s from the db: %s", m.TargetAccountID, err)
+			}
+			m.GTSAccount = a
+		}
+		if m.GTSAccount.Domain != "" {
+			// not a local account so skip it
+			continue
+		}
+
+		// make sure a notif doesn't already exist for this mention
+		err := p.db.GetWhere([]db.Where{
+			{Key: "notification_type", Value: gtsmodel.NotificationMention},
+			{Key: "target_account_id", Value: m.TargetAccountID},
+			{Key: "origin_account_id", Value: status.AccountID},
+			{Key: "status_id", Value: status.ID},
+		}, &gtsmodel.Notification{})
+		if err == nil {
+			// notification exists already so just continue
+			continue
+		}
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// there's a real error in the db
+			return fmt.Errorf("notifyStatus: error checking existence of notification for mention with id %s : %s", m.ID, err)
+		}
+
+		// if we've reached this point we know the mention is for a local account, and the notification doesn't exist, so create it
+		notif := &gtsmodel.Notification{
+			NotificationType: gtsmodel.NotificationMention,
+			TargetAccountID:  m.TargetAccountID,
+			OriginAccountID:  status.AccountID,
+			StatusID:         status.ID,
+		}
+
+		if err := p.db.Put(notif); err != nil {
+			return fmt.Errorf("notifyStatus: error putting notification in database: %s", err)
+		}
+	}
+
 	return nil
 }
 
-func (p *processor) notifyFollow(follow *gtsmodel.Follow) error {
+func (p *processor) notifyFollowRequest(followRequest *gtsmodel.FollowRequest, receivingAccount *gtsmodel.Account) error {
+	// return if this isn't a local account
+	if receivingAccount.Domain != "" {
+		return nil
+	}
+
+	notif := &gtsmodel.Notification{
+		NotificationType: gtsmodel.NotificationFollowRequest,
+		TargetAccountID:  followRequest.TargetAccountID,
+		OriginAccountID:  followRequest.AccountID,
+	}
+
+	if err := p.db.Put(notif); err != nil {
+		return fmt.Errorf("notifyFollowRequest: error putting notification in database: %s", err)
+	}
+
 	return nil
 }
 
-func (p *processor) notifyFave(fave *gtsmodel.StatusFave) error {
-   return nil
+func (p *processor) notifyFollow(follow *gtsmodel.Follow, receivingAccount *gtsmodel.Account) error {
+	// return if this isn't a local account
+	if receivingAccount.Domain != "" {
+		return nil
+	}
+
+	// first remove the follow request notification
+	if err := p.db.DeleteWhere([]db.Where{
+		{Key: "notification_type", Value: gtsmodel.NotificationFollowRequest},
+		{Key: "target_account_id", Value: follow.TargetAccountID},
+		{Key: "origin_account_id", Value: follow.AccountID},
+	}, &gtsmodel.Notification{}); err != nil {
+		return fmt.Errorf("notifyFollow: error removing old follow request notification from database: %s", err)
+	}
+
+	// now create the new follow notification
+	notif := &gtsmodel.Notification{
+		NotificationType: gtsmodel.NotificationFollow,
+		TargetAccountID:  follow.TargetAccountID,
+		OriginAccountID:  follow.AccountID,
+	}
+	if err := p.db.Put(notif); err != nil {
+		return fmt.Errorf("notifyFollow: error putting notification in database: %s", err)
+	}
+
+	return nil
+}
+
+func (p *processor) notifyFave(fave *gtsmodel.StatusFave, receivingAccount *gtsmodel.Account) error {
+	// return if this isn't a local account
+	if receivingAccount.Domain != "" {
+		return nil
+	}
+
+	notif := &gtsmodel.Notification{
+		NotificationType: gtsmodel.NotificationFave,
+		TargetAccountID:  fave.TargetAccountID,
+		OriginAccountID:  fave.AccountID,
+		StatusID:         fave.StatusID,
+	}
+
+	if err := p.db.Put(notif); err != nil {
+		return fmt.Errorf("notifyFave: error putting notification in database: %s", err)
+	}
+
+	return nil
 }

internal/message/fromfederatorprocess.go

@@ -74,6 +74,26 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			if err := p.db.UpdateByID(incomingAccount.ID, incomingAccount); err != nil {
 				return fmt.Errorf("error updating dereferenced account in the db: %s", err)
 			}
+		case gtsmodel.ActivityStreamsLike:
+			// CREATE A FAVE
+			incomingFave, ok := federatorMsg.GTSModel.(*gtsmodel.StatusFave)
+			if !ok {
+				return errors.New("like was not parseable as *gtsmodel.StatusFave")
+			}
+
+			if err := p.notifyFave(incomingFave, federatorMsg.ReceivingAccount); err != nil {
+				return err
+			}
+		case gtsmodel.ActivityStreamsFollow:
+			// CREATE A FOLLOW REQUEST
+			incomingFollowRequest, ok := federatorMsg.GTSModel.(*gtsmodel.FollowRequest)
+			if !ok {
+				return errors.New("like was not parseable as *gtsmodel.FollowRequest")
+			}
+
+			if err := p.notifyFollowRequest(incomingFollowRequest, federatorMsg.ReceivingAccount); err != nil {
+				return err
+			}
 		}
 	case gtsmodel.ActivityStreamsUpdate:
 		// UPDATE
@@ -106,6 +126,20 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			// DELETE A PROFILE/ACCOUNT
 			// TODO: handle side effects of account deletion here: delete all objects, statuses, media etc associated with account
 		}
+	case gtsmodel.ActivityStreamsAccept:
+		// ACCEPT
+		switch federatorMsg.APObjectType {
+		case gtsmodel.ActivityStreamsFollow:
+			// ACCEPT A FOLLOW
+			follow, ok := federatorMsg.GTSModel.(*gtsmodel.Follow)
+			if !ok {
+				return errors.New("follow was not parseable as *gtsmodel.Follow")
+			}
+
+			if err := p.notifyFollow(follow, federatorMsg.ReceivingAccount); err != nil {
+				return err
+			}
+		}
 	}
 
 	return nil
@@ -215,8 +249,8 @@ func (p *processor) dereferenceStatusFields(status *gtsmodel.Status) error {
 		}
 
 		m.StatusID = status.ID
-		m.OriginAccountID = status.GTSAccount.ID
-		m.OriginAccountURI = status.GTSAccount.URI
+		m.OriginAccountID = status.GTSAuthorAccount.ID
+		m.OriginAccountURI = status.GTSAuthorAccount.URI
 
 		targetAccount := &gtsmodel.Account{}
 		if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String()}}, targetAccount); err != nil {

internal/message/notificationsprocess.go

@@ -0,0 +1,24 @@
+package message
+
+import (
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+func (p *processor) NotificationsGet(authed *oauth.Auth, limit int, maxID string) ([]*apimodel.Notification, ErrorWithCode) {
+	notifs, err := p.db.GetNotificationsForAccount(authed.Account.ID, limit, maxID)
+	if err != nil {
+		return nil, NewErrorInternalError(err)
+	}
+
+	mastoNotifs := []*apimodel.Notification{}
+	for _, n := range notifs {
+		mastoNotif, err := p.tc.NotificationToMasto(n)
+		if err != nil {
+			return nil, NewErrorInternalError(err)
+		}
+		mastoNotifs = append(mastoNotifs, mastoNotif)
+	}
+
+	return mastoNotifs, nil
+}

internal/message/processor.go

@@ -106,6 +106,9 @@ type Processor interface {
 	// MediaUpdate handles the PUT of a media attachment with the given ID and form
 	MediaUpdate(authed *oauth.Auth, attachmentID string, form *apimodel.AttachmentUpdateRequest) (*apimodel.Attachment, ErrorWithCode)
 
+	// NotificationsGet
+	NotificationsGet(authed *oauth.Auth, limit int, maxID string) ([]*apimodel.Notification, ErrorWithCode)
+
 	// StatusCreate processes the given form to create a new status, returning the api model representation of that status if it's OK.
 	StatusCreate(authed *oauth.Auth, form *apimodel.AdvancedStatusCreateForm) (*apimodel.Status, error)
 	// StatusDelete processes the delete of a given status, returning the deleted status if the delete goes through.

internal/message/statusprocess.go

@@ -278,54 +278,14 @@ func (p *processor) StatusBoost(authed *oauth.Auth, targetStatusID string) (*api
 	}
 
 	// it's visible! it's boostable! so let's boost the FUCK out of it
-	// first we create a new status and add some basic info to it -- this will be the wrapper for the boosted status
-
-	// the wrapper won't use the same ID as the boosted status so we generate some new UUIDs
-	uris := util.GenerateURIsForAccount(authed.Account.Username, p.config.Protocol, p.config.Host)
-	boostWrapperStatusID := uuid.NewString()
-	boostWrapperStatusURI := fmt.Sprintf("%s/%s", uris.StatusesURI, boostWrapperStatusID)
-	boostWrapperStatusURL := fmt.Sprintf("%s/%s", uris.StatusesURL, boostWrapperStatusID)
-
-	boostWrapperStatus := &gtsmodel.Status{
-		ID:  boostWrapperStatusID,
-		URI: boostWrapperStatusURI,
-		URL: boostWrapperStatusURL,
-
-		// the boosted status is not created now, but the boost certainly is
-		CreatedAt:                time.Now(),
-		UpdatedAt:                time.Now(),
-		Local:                    true, // always local since this is being done through the client API
-		AccountID:                authed.Account.ID,
-		CreatedWithApplicationID: authed.Application.ID,
-
-		// replies can be boosted, but boosts are never replies
-		InReplyToID:        "",
-		InReplyToAccountID: "",
-
-		// these will all be wrapped in the boosted status so set them empty here
-		Attachments: []string{},
-		Tags:        []string{},
-		Mentions:    []string{},
-		Emojis:      []string{},
-
-		// the below fields will be taken from the target status
-		Content:             util.HTMLFormat(targetStatus.Content),
-		ContentWarning:      targetStatus.ContentWarning,
-		ActivityStreamsType: targetStatus.ActivityStreamsType,
-		Sensitive:           targetStatus.Sensitive,
-		Language:            targetStatus.Language,
-		Text:                targetStatus.Text,
-		BoostOfID:           targetStatus.ID,
-		Visibility:          targetStatus.Visibility,
-		VisibilityAdvanced:  targetStatus.VisibilityAdvanced,
-
-		// attach these here for convenience -- the boosted status/account won't go in the DB
-		// but they're needed in the processor and for the frontend. Since we have them, we can
-		// attach them so we don't need to fetch them again later (save some DB calls)
-		GTSBoostedStatus:  targetStatus,
-		GTSBoostedAccount: targetAccount,
+	boostWrapperStatus, err := p.tc.StatusToBoost(targetStatus, authed.Account)
+	if err != nil {
+		return nil, NewErrorInternalError(err)
 	}
 
+	boostWrapperStatus.CreatedWithApplicationID = authed.Application.ID
+	boostWrapperStatus.GTSBoostedAccount = targetAccount
+
 	// put the boost in the database
 	if err := p.db.Put(boostWrapperStatus); err != nil {
 		return nil, NewErrorInternalError(err)

internal/typeutils/asinterfaces.go

@@ -102,6 +102,15 @@ type Followable interface {
 	withObject
 }
 
+// Likeable represents the minimum interface for an activitystreams 'like' activity.
+type Likeable interface {
+	withJSONLDId
+	withTypeName
+
+	withActor
+	withObject
+}
+
 type withJSONLDId interface {
 	GetJSONLDId() vocab.JSONLDIdProperty
 }

internal/typeutils/astointernal.go

@@ -226,7 +226,7 @@ func (c *converter) ASStatusToStatus(statusable Statusable) (*gtsmodel.Status, e
 		return nil, fmt.Errorf("couldn't get status owner from db: %s", err)
 	}
 	status.AccountID = statusOwner.ID
-	status.GTSAccount = statusOwner
+	status.GTSAuthorAccount = statusOwner
 
 	// check if there's a post that this is a reply to
 	inReplyToURI, err := extractInReplyToURI(statusable)
@@ -380,6 +380,48 @@ func (c *converter) ASFollowToFollow(followable Followable) (*gtsmodel.Follow, e
 	return follow, nil
 }
 
+func (c *converter) ASLikeToFave(likeable Likeable) (*gtsmodel.StatusFave, error) {
+	idProp := likeable.GetJSONLDId()
+	if idProp == nil || !idProp.IsIRI() {
+		return nil, errors.New("no id property set on like, or was not an iri")
+	}
+	uri := idProp.GetIRI().String()
+
+	origin, err := extractActor(likeable)
+	if err != nil {
+		return nil, errors.New("error extracting actor property from like")
+	}
+	originAccount := &gtsmodel.Account{}
+	if err := c.db.GetWhere([]db.Where{{Key: "uri", Value: origin.String()}}, originAccount); err != nil {
+		return nil, fmt.Errorf("error extracting account with uri %s from the database: %s", origin.String(), err)
+	}
+
+	target, err := extractObject(likeable)
+	if err != nil {
+		return nil, errors.New("error extracting object property from like")
+	}
+
+	targetStatus := &gtsmodel.Status{}
+	if err := c.db.GetWhere([]db.Where{{Key: "uri", Value: target.String()}}, targetStatus); err != nil {
+		return nil, fmt.Errorf("error extracting status with uri %s from the database: %s", target.String(), err)
+	}
+
+	targetAccount := &gtsmodel.Account{}
+	if err := c.db.GetByID(targetStatus.AccountID, targetAccount); err != nil {
+		return nil, fmt.Errorf("error extracting account with id %s from the database: %s", targetStatus.AccountID, err)
+	}
+
+	return &gtsmodel.StatusFave{
+		TargetAccountID:  targetAccount.ID,
+		StatusID:         targetStatus.ID,
+		AccountID:        originAccount.ID,
+		URI:              uri,
+		GTSStatus:        targetStatus,
+		GTSTargetAccount: targetAccount,
+		GTSFavingAccount: originAccount,
+	}, nil
+}
+
 func isPublic(tos []*url.URL) bool {
 	for _, entry := range tos {
 		if strings.EqualFold(entry.String(), "https://www.w3.org/ns/activitystreams#Public") {

internal/typeutils/converter.go

@@ -44,45 +44,36 @@ type TypeConverter interface {
 	// if something goes wrong. The returned account should be ready to serialize on an API level, and may have sensitive fields,
 	// so serve it only to an authorized user who should have permission to see it.
 	AccountToMastoSensitive(account *gtsmodel.Account) (*model.Account, error)
-
 	// AccountToMastoPublic takes a db model account as a param, and returns a populated mastotype account, or an error
 	// if something goes wrong. The returned account should be ready to serialize on an API level, and may NOT have sensitive fields.
 	// In other words, this is the public record that the server has of an account.
 	AccountToMastoPublic(account *gtsmodel.Account) (*model.Account, error)
-
 	// AppToMastoSensitive takes a db model application as a param, and returns a populated mastotype application, or an error
 	// if something goes wrong. The returned application should be ready to serialize on an API level, and may have sensitive fields
 	// (such as client id and client secret), so serve it only to an authorized user who should have permission to see it.
 	AppToMastoSensitive(application *gtsmodel.Application) (*model.Application, error)
-
 	// AppToMastoPublic takes a db model application as a param, and returns a populated mastotype application, or an error
 	// if something goes wrong. The returned application should be ready to serialize on an API level, and has sensitive
 	// fields sanitized so that it can be served to non-authorized accounts without revealing any private information.
 	AppToMastoPublic(application *gtsmodel.Application) (*model.Application, error)
-
 	// AttachmentToMasto converts a gts model media attacahment into its mastodon representation for serialization on the API.
 	AttachmentToMasto(attachment *gtsmodel.MediaAttachment) (model.Attachment, error)
-
 	// MentionToMasto converts a gts model mention into its mastodon (frontend) representation for serialization on the API.
 	MentionToMasto(m *gtsmodel.Mention) (model.Mention, error)
-
 	// EmojiToMasto converts a gts model emoji into its mastodon (frontend) representation for serialization on the API.
 	EmojiToMasto(e *gtsmodel.Emoji) (model.Emoji, error)
-
 	// TagToMasto converts a gts model tag into its mastodon (frontend) representation for serialization on the API.
 	TagToMasto(t *gtsmodel.Tag) (model.Tag, error)
-
 	// StatusToMasto converts a gts model status into its mastodon (frontend) representation for serialization on the API.
-	StatusToMasto(s *gtsmodel.Status, targetAccount *gtsmodel.Account, requestingAccount *gtsmodel.Account, boostOfAccount *gtsmodel.Account, replyToAccount *gtsmodel.Account, reblogOfStatus *gtsmodel.Status) (*model.Status, error)
-
+	StatusToMasto(s *gtsmodel.Status, statusAuthor *gtsmodel.Account, requestingAccount *gtsmodel.Account, boostOfAccount *gtsmodel.Account, replyToAccount *gtsmodel.Account, reblogOfStatus *gtsmodel.Status) (*model.Status, error)
 	// VisToMasto converts a gts visibility into its mastodon equivalent
 	VisToMasto(m gtsmodel.Visibility) model.Visibility
-
 	// InstanceToMasto converts a gts instance into its mastodon equivalent for serving at /api/v1/instance
 	InstanceToMasto(i *gtsmodel.Instance) (*model.Instance, error)
-
 	// RelationshipToMasto converts a gts relationship into its mastodon equivalent for serving in various places
 	RelationshipToMasto(r *gtsmodel.Relationship) (*model.Relationship, error)
+	// NotificationToMasto converts a gts notification into a mastodon notification
+	NotificationToMasto(n *gtsmodel.Notification) (*model.Notification, error)
 
 	/*
 		FRONTEND (mastodon) MODEL TO INTERNAL (gts) MODEL
@@ -107,6 +98,8 @@ type TypeConverter interface {
 	ASFollowToFollowRequest(followable Followable) (*gtsmodel.FollowRequest, error)
 	// ASFollowToFollowRequest converts a remote activitystreams `follow` representation into gts model follow.
 	ASFollowToFollow(followable Followable) (*gtsmodel.Follow, error)
+	// ASLikeToFave converts a remote activitystreams 'like' representation into a gts model status fave.
+	ASLikeToFave(likeable Likeable) (*gtsmodel.StatusFave, error)
 
 	/*
 		INTERNAL (gts) MODEL TO ACTIVITYSTREAMS MODEL
@@ -114,21 +107,25 @@ type TypeConverter interface {
 
 	// AccountToAS converts a gts model account into an activity streams person, suitable for federation
 	AccountToAS(a *gtsmodel.Account) (vocab.ActivityStreamsPerson, error)
-
 	// StatusToAS converts a gts model status into an activity streams note, suitable for federation
 	StatusToAS(s *gtsmodel.Status) (vocab.ActivityStreamsNote, error)
-
 	// FollowToASFollow converts a gts model Follow into an activity streams Follow, suitable for federation
 	FollowToAS(f *gtsmodel.Follow, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) (vocab.ActivityStreamsFollow, error)
-
 	// MentionToAS converts a gts model mention into an activity streams Mention, suitable for federation
 	MentionToAS(m *gtsmodel.Mention) (vocab.ActivityStreamsMention, error)
-
 	// AttachmentToAS converts a gts model media attachment into an activity streams Attachment, suitable for federation
 	AttachmentToAS(a *gtsmodel.MediaAttachment) (vocab.ActivityStreamsDocument, error)
-
 	// FaveToAS converts a gts model status fave into an activityStreams LIKE, suitable for federation.
 	FaveToAS(f *gtsmodel.StatusFave) (vocab.ActivityStreamsLike, error)
+
+	/*
+		INTERNAL (gts) MODEL TO INTERNAL MODEL
+	*/
+
+	// FollowRequestToFollow just converts a follow request into a follow, that's it! No bells and whistles.
+	FollowRequestToFollow(f *gtsmodel.FollowRequest) *gtsmodel.Follow
+	// StatusToBoost wraps the given status into a boosting status.
+	StatusToBoost(s *gtsmodel.Status, boostingAccount *gtsmodel.Account) (*gtsmodel.Status, error)
 }
 
 type converter struct {

internal/typeutils/internal.go

@@ -0,0 +1,76 @@
+package typeutils
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (c *converter) FollowRequestToFollow(f *gtsmodel.FollowRequest) *gtsmodel.Follow {
+	return &gtsmodel.Follow{
+		ID:              f.ID,
+		CreatedAt:       f.CreatedAt,
+		UpdatedAt:       f.UpdatedAt,
+		AccountID:       f.AccountID,
+		TargetAccountID: f.TargetAccountID,
+		ShowReblogs:     f.ShowReblogs,
+		URI:             f.URI,
+		Notify:          f.Notify,
+	}
+}
+
+func (c *converter) StatusToBoost(s *gtsmodel.Status, boostingAccount *gtsmodel.Account) (*gtsmodel.Status, error) {
+	// the wrapper won't use the same ID as the boosted status so we generate some new UUIDs
+	uris := util.GenerateURIsForAccount(boostingAccount.Username, c.config.Protocol, c.config.Host)
+	boostWrapperStatusID := uuid.NewString()
+	boostWrapperStatusURI := fmt.Sprintf("%s/%s", uris.StatusesURI, boostWrapperStatusID)
+	boostWrapperStatusURL := fmt.Sprintf("%s/%s", uris.StatusesURL, boostWrapperStatusID)
+
+	local := true
+	if boostingAccount.Domain != "" {
+		local = false
+	}
+
+	boostWrapperStatus := &gtsmodel.Status{
+		ID:  boostWrapperStatusID,
+		URI: boostWrapperStatusURI,
+		URL: boostWrapperStatusURL,
+
+		// the boosted status is not created now, but the boost certainly is
+		CreatedAt:                time.Now(),
+		UpdatedAt:                time.Now(),
+		Local:                    local,
+		AccountID:                boostingAccount.ID,
+
+		// replies can be boosted, but boosts are never replies
+		InReplyToID:        "",
+		InReplyToAccountID: "",
+
+		// these will all be wrapped in the boosted status so set them empty here
+		Attachments: []string{},
+		Tags:        []string{},
+		Mentions:    []string{},
+		Emojis:      []string{},
+
+		// the below fields will be taken from the target status
+		Content:             util.HTMLFormat(s.Content),
+		ContentWarning:      s.ContentWarning,
+		ActivityStreamsType: s.ActivityStreamsType,
+		Sensitive:           s.Sensitive,
+		Language:            s.Language,
+		Text:                s.Text,
+		BoostOfID:           s.ID,
+		Visibility:          s.Visibility,
+		VisibilityAdvanced:  s.VisibilityAdvanced,
+
+		// attach these here for convenience -- the boosted status/account won't go in the DB
+		// but they're needed in the processor and for the frontend. Since we have them, we can
+		// attach them so we don't need to fetch them again later (save some DB calls)
+		GTSBoostedStatus: s,
+	}
+
+	return boostWrapperStatus, nil
+}

internal/typeutils/internaltoas.go

@@ -262,12 +262,12 @@ func (c *converter) StatusToAS(s *gtsmodel.Status) (vocab.ActivityStreamsNote, e
 
 	// check if author account is already attached to status and attach it if not
 	// if we can't retrieve this, bail here already because we can't attribute the status to anyone
-	if s.GTSAccount == nil {
+	if s.GTSAuthorAccount == nil {
 		a := &gtsmodel.Account{}
 		if err := c.db.GetByID(s.AccountID, a); err != nil {
 			return nil, fmt.Errorf("StatusToAS: error retrieving author account from db: %s", err)
 		}
-		s.GTSAccount = a
+		s.GTSAuthorAccount = a
 	}
 
 	// create the Note!
@@ -328,9 +328,9 @@ func (c *converter) StatusToAS(s *gtsmodel.Status) (vocab.ActivityStreamsNote, e
 	}
 
 	// attributedTo
-	authorAccountURI, err := url.Parse(s.GTSAccount.URI)
+	authorAccountURI, err := url.Parse(s.GTSAuthorAccount.URI)
 	if err != nil {
-		return nil, fmt.Errorf("StatusToAS: error parsing url %s: %s", s.GTSAccount.URI, err)
+		return nil, fmt.Errorf("StatusToAS: error parsing url %s: %s", s.GTSAuthorAccount.URI, err)
 	}
 	attributedToProp := streams.NewActivityStreamsAttributedToProperty()
 	attributedToProp.AppendIRI(authorAccountURI)
@@ -357,9 +357,9 @@ func (c *converter) StatusToAS(s *gtsmodel.Status) (vocab.ActivityStreamsNote, e
 	status.SetActivityStreamsTag(tagProp)
 
 	// parse out some URIs we need here
-	authorFollowersURI, err := url.Parse(s.GTSAccount.FollowersURI)
+	authorFollowersURI, err := url.Parse(s.GTSAuthorAccount.FollowersURI)
 	if err != nil {
-		return nil, fmt.Errorf("StatusToAS: error parsing url %s: %s", s.GTSAccount.FollowersURI, err)
+		return nil, fmt.Errorf("StatusToAS: error parsing url %s: %s", s.GTSAuthorAccount.FollowersURI, err)
 	}
 
 	publicURI, err := url.Parse(asPublicURI)

internal/typeutils/internaltofrontend.go

@@ -138,6 +138,9 @@ func (c *converter) AccountToMastoPublic(a *gtsmodel.Account) (*model.Account, e
 		fields = append(fields, mField)
 	}
 
+	emojis := []model.Emoji{}
+	// TODO: account emojis
+
 	var acct string
 	if a.Domain != "" {
 		// this is a remote user
@@ -165,7 +168,7 @@ func (c *converter) AccountToMastoPublic(a *gtsmodel.Account) (*model.Account, e
 		FollowingCount: followingCount,
 		StatusesCount:  statusesCount,
 		LastStatusAt:   lastStatusAt,
-		Emojis:         nil, // TODO: implement this
+		Emojis:         emojis, // TODO: implement this
 		Fields:         fields,
 	}, nil
 }
@@ -267,7 +270,7 @@ func (c *converter) TagToMasto(t *gtsmodel.Tag) (model.Tag, error) {
 
 func (c *converter) StatusToMasto(
 	s *gtsmodel.Status,
-	targetAccount *gtsmodel.Account,
+	statusAuthor *gtsmodel.Account,
 	requestingAccount *gtsmodel.Account,
 	boostOfAccount *gtsmodel.Account,
 	replyToAccount *gtsmodel.Account,
@@ -379,7 +382,7 @@ func (c *converter) StatusToMasto(
 		}
 	}
 
-	mastoTargetAccount, err := c.AccountToMastoPublic(targetAccount)
+	mastoAuthorAccount, err := c.AccountToMastoPublic(statusAuthor)
 	if err != nil {
 		return nil, fmt.Errorf("error parsing account of status author: %s", err)
 	}
@@ -517,7 +520,7 @@ func (c *converter) StatusToMasto(
 		Content:            s.Content,
 		Reblog:             mastoRebloggedStatus,
 		Application:        mastoApplication,
-		Account:            mastoTargetAccount,
+		Account:            mastoAuthorAccount,
 		MediaAttachments:   mastoAttachments,
 		Mentions:           mastoMentions,
 		Tags:               mastoTags,
@@ -594,3 +597,68 @@ func (c *converter) RelationshipToMasto(r *gtsmodel.Relationship) (*model.Relati
 		Note:                r.Note,
 	}, nil
 }
+
+func (c *converter) NotificationToMasto(n *gtsmodel.Notification) (*model.Notification, error) {
+
+	if n.GTSTargetAccount == nil {
+		tAccount := &gtsmodel.Account{}
+		if err := c.db.GetByID(n.TargetAccountID, tAccount); err != nil {
+			return nil, fmt.Errorf("NotificationToMasto: error getting target account with id %s from the db: %s", n.TargetAccountID, err)
+		}
+		n.GTSTargetAccount = tAccount
+	}
+
+	if n.GTSOriginAccount == nil {
+		ogAccount := &gtsmodel.Account{}
+		if err := c.db.GetByID(n.OriginAccountID, ogAccount); err != nil {
+			return nil, fmt.Errorf("NotificationToMasto: error getting origin account with id %s from the db: %s", n.OriginAccountID, err)
+		}
+		n.GTSOriginAccount = ogAccount
+	}
+	mastoAccount, err := c.AccountToMastoPublic(n.GTSOriginAccount)
+	if err != nil {
+		return nil, fmt.Errorf("NotificationToMasto: error converting account to masto: %s", err)
+	}
+
+	var mastoStatus *model.Status
+	if n.StatusID != "" {
+		if n.GTSStatus == nil {
+			status := &gtsmodel.Status{}
+			if err := c.db.GetByID(n.StatusID, status); err != nil {
+				return nil, fmt.Errorf("NotificationToMasto: error getting status with id %s from the db: %s", n.StatusID, err)
+			}
+			n.GTSStatus = status
+		}
+
+		var replyToAccount *gtsmodel.Account
+		if n.GTSStatus.InReplyToAccountID != "" {
+			r := &gtsmodel.Account{}
+			if err := c.db.GetByID(n.GTSStatus.InReplyToAccountID, r); err != nil {
+				return nil, fmt.Errorf("NotificationToMasto: error getting replied to account with id %s from the db: %s", n.GTSStatus.InReplyToAccountID, err)
+			}
+			replyToAccount = r
+		}
+
+		if n.GTSStatus.GTSAuthorAccount == nil {
+			if n.GTSStatus.AccountID == n.GTSTargetAccount.ID {
+				n.GTSStatus.GTSAuthorAccount = n.GTSTargetAccount
+			} else if n.GTSStatus.AccountID == n.GTSOriginAccount.ID {
+				n.GTSStatus.GTSAuthorAccount = n.GTSOriginAccount
+			}
+		}
+
+		var err error
+		mastoStatus, err = c.StatusToMasto(n.GTSStatus, n.GTSStatus.GTSAuthorAccount, n.GTSTargetAccount, nil, replyToAccount, nil)
+		if err != nil {
+			return nil, fmt.Errorf("NotificationToMasto: error converting status to masto: %s", err)
+		}
+	}
+
+	return &model.Notification{
+		ID:        n.ID,
+		Type:      string(n.NotificationType),
+		CreatedAt: n.CreatedAt.Format(time.RFC3339),
+		Account:   mastoAccount,
+		Status:    mastoStatus,
+	}, nil
+}

testrig/federatingdb.go

@@ -2,10 +2,10 @@ package testrig
 
 import (
 	"github.com/superseriousbusiness/gotosocial/internal/db"
-	"github.com/superseriousbusiness/gotosocial/internal/federation"
+	"github.com/superseriousbusiness/gotosocial/internal/federation/federatingdb"
 )
 
 // NewTestFederatingDB returns a federating DB with the underlying db
-func NewTestFederatingDB(db db.DB) federation.FederatingDB {
-	return federation.NewFederatingDB(db, NewTestConfig(), NewTestLog())
+func NewTestFederatingDB(db db.DB) federatingdb.DB {
+	return federatingdb.New(db, NewTestConfig(), NewTestLog())
 }