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/*
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 typeutils
import (
"github.com/go-fed/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
const (
asPublicURI = "https://www.w3.org/ns/activitystreams#Public"
)
// TypeConverter is an interface for the common action of converting between apimodule (frontend, serializable) models,
// internal gts models used in the database, and activitypub models used in federation.
//
// It requires access to the database because many of the conversions require pulling out database entries and counting them etc.
// That said, it *absolutely should not* manipulate database entries in any way, only examine them.
type TypeConverter interface {
/*
INTERNAL (gts) MODEL TO FRONTEND (mastodon) MODEL
*/
// AccountToMastoSensitive 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 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.
//
// Requesting account can be nil.
StatusToMasto(s *gtsmodel.Status, requestingAccount *gtsmodel.Account) (*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
*/
// MastoVisToVis converts a mastodon visibility into its gts equivalent.
MastoVisToVis(m model.Visibility) gtsmodel.Visibility
/*
ACTIVITYSTREAMS MODEL TO INTERNAL (gts) MODEL
*/
// ASPersonToAccount converts a remote account/person/application representation into a gts model account.
//
// If update is false, and the account is already known in the database, then the existing account entry will be returned.
// If update is true, then even if the account is already known, all fields in the accountable will be parsed and a new *gtsmodel.Account
// will be generated. This is useful when one needs to force refresh of an account, eg., during an Update of a Profile.
ASRepresentationToAccount(accountable Accountable, update bool) (*gtsmodel.Account, error)
// ASStatus converts a remote activitystreams 'status' representation into a gts model status.
ASStatusToStatus(statusable Statusable) (*gtsmodel.Status, error)
// ASFollowToFollowRequest converts a remote activitystreams `follow` representation into gts model follow request.
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)
// ASAnnounceToStatus converts an activitystreams 'announce' into a status.
//
// The returned bool indicates whether this status is new (true) or not new (false).
//
// In other words, if the status is already in the database with the ID set on the announceable, then that will be returned,
// the returned bool will be false, and no further processing is necessary. If the returned bool is true, indicating
// that this is a new announce, then further processing will be necessary, because the returned status will be bareboned and
// require further dereferencing.
//
// This is useful when multiple users on an instance might receive the same boost, and we only want to process the boost once.
//
// NOTE -- this is different from one status being boosted multiple times! In this case, new boosts should indeed be created.
ASAnnounceToStatus(announceable Announceable) (status *gtsmodel.Status, new bool, err error)
/*
INTERNAL (gts) MODEL TO ACTIVITYSTREAMS MODEL
*/
// AccountToAS converts a gts model account into an activity streams person, suitable for federation
AccountToAS(a *gtsmodel.Account) (vocab.ActivityStreamsPerson, error)
AccountToASMinimal(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)
// BoostToAS converts a gts model boost into an activityStreams ANNOUNCE, suitable for federation
BoostToAS(boostWrapperStatus *gtsmodel.Status, boostingAccount *gtsmodel.Account, boostedAccount *gtsmodel.Account) (vocab.ActivityStreamsAnnounce, 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)
/*
WRAPPER CONVENIENCE FUNCTIONS
*/
// WrapPersonInUpdate
WrapPersonInUpdate(person vocab.ActivityStreamsPerson, originAccount *gtsmodel.Account) (vocab.ActivityStreamsUpdate, error)
}
type converter struct {
config *config.Config
db db.DB
}
// NewConverter returns a new Converter
func NewConverter(config *config.Config, db db.DB) TypeConverter {
return &converter{
config: config,
db: db,
}
}
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