forked from mirrors/gotosocial
103 lines
4.8 KiB
Go
103 lines
4.8 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package dereferencing
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import (
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"context"
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"net/url"
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"sync"
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"github.com/sirupsen/logrus"
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"github.com/superseriousbusiness/gotosocial/internal/ap"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/media"
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"github.com/superseriousbusiness/gotosocial/internal/transport"
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"github.com/superseriousbusiness/gotosocial/internal/typeutils"
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)
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// Dereferencer wraps logic and functionality for doing dereferencing of remote accounts, statuses, etc, from federated instances.
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type Dereferencer interface {
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GetRemoteAccount(ctx context.Context, username string, remoteAccountID *url.URL, refresh bool) (*gtsmodel.Account, bool, error)
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EnrichRemoteAccount(ctx context.Context, username string, account *gtsmodel.Account) (*gtsmodel.Account, error)
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GetRemoteStatus(ctx context.Context, username string, remoteStatusID *url.URL, refresh, includeParent, includeChilds bool) (*gtsmodel.Status, ap.Statusable, bool, error)
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EnrichRemoteStatus(ctx context.Context, username string, status *gtsmodel.Status, includeParent, includeChilds bool) (*gtsmodel.Status, error)
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GetRemoteInstance(ctx context.Context, username string, remoteInstanceURI *url.URL) (*gtsmodel.Instance, error)
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// GetRemoteAttachment takes a minimal attachment struct and converts it into a fully fleshed out attachment, stored in the database and instance storage.
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//
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// The parameter minAttachment must have at least the following fields defined:
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// * minAttachment.RemoteURL
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// * minAttachment.AccountID
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// * minAttachment.File.ContentType
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//
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// The returned attachment will have an ID generated for it, so no need to generate one beforehand.
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// A blurhash will also be generated for the attachment.
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//
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// Most other fields will be preserved on the passed attachment, including:
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// * minAttachment.StatusID
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// * minAttachment.CreatedAt
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// * minAttachment.UpdatedAt
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// * minAttachment.FileMeta
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// * minAttachment.AccountID
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// * minAttachment.Description
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// * minAttachment.ScheduledStatusID
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// * minAttachment.Thumbnail.RemoteURL
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// * minAttachment.Avatar
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// * minAttachment.Header
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//
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// GetRemoteAttachment will return early if an attachment with the same value as minAttachment.RemoteURL
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// is found in the database -- then that attachment will be returned and nothing else will be changed or stored.
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GetRemoteAttachment(ctx context.Context, requestingUsername string, minAttachment *gtsmodel.MediaAttachment) (*gtsmodel.MediaAttachment, error)
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// RefreshAttachment is like GetRemoteAttachment, but the attachment will always be dereferenced again,
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// whether or not it was already stored in the database.
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RefreshAttachment(ctx context.Context, requestingUsername string, minAttachment *gtsmodel.MediaAttachment) (*gtsmodel.MediaAttachment, error)
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DereferenceAnnounce(ctx context.Context, announce *gtsmodel.Status, requestingUsername string) error
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DereferenceThread(ctx context.Context, username string, statusIRI *url.URL) error
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Handshaking(ctx context.Context, username string, remoteAccountID *url.URL) bool
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}
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type deref struct {
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log *logrus.Logger
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db db.DB
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typeConverter typeutils.TypeConverter
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transportController transport.Controller
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mediaHandler media.Handler
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config *config.Config
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handshakes map[string][]*url.URL
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handshakeSync *sync.Mutex // mutex to lock/unlock when checking or updating the handshakes map
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}
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// NewDereferencer returns a Dereferencer initialized with the given parameters.
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func NewDereferencer(config *config.Config, db db.DB, typeConverter typeutils.TypeConverter, transportController transport.Controller, mediaHandler media.Handler, log *logrus.Logger) Dereferencer {
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return &deref{
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log: log,
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db: db,
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typeConverter: typeConverter,
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transportController: transportController,
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mediaHandler: mediaHandler,
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config: config,
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handshakeSync: &sync.Mutex{},
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}
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}
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