Ap (#14)

Big restructuring and initial work on activitypub

1 files changed, 260 insertions, 0 deletions

diff --git a/internal/typeutils/internaltoas.go b/internal/typeutils/internaltoas.go
new file mode 100644
index 000000000..73c121155
--- /dev/null
+++ b/internal/typeutils/internaltoas.go
@@ -0,0 +1,260 @@
+/*
+   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 (
+	"crypto/x509"
+	"encoding/pem"
+	"net/url"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Converts a gts model account into an Activity Streams person type, following
+// the spec laid out for mastodon here: https://docs.joinmastodon.org/spec/activitypub/
+func (c *converter) AccountToAS(a *gtsmodel.Account) (vocab.ActivityStreamsPerson, error) {
+	person := streams.NewActivityStreamsPerson()
+
+	// id should be the activitypub URI of this user
+	// something like https://example.org/users/example_user
+	profileIDURI, err := url.Parse(a.URI)
+	if err != nil {
+		return nil, err
+	}
+	idProp := streams.NewJSONLDIdProperty()
+	idProp.SetIRI(profileIDURI)
+	person.SetJSONLDId(idProp)
+
+	// following
+	// The URI for retrieving a list of accounts this user is following
+	followingURI, err := url.Parse(a.FollowingURI)
+	if err != nil {
+		return nil, err
+	}
+	followingProp := streams.NewActivityStreamsFollowingProperty()
+	followingProp.SetIRI(followingURI)
+	person.SetActivityStreamsFollowing(followingProp)
+
+	// followers
+	// The URI for retrieving a list of this user's followers
+	followersURI, err := url.Parse(a.FollowersURI)
+	if err != nil {
+		return nil, err
+	}
+	followersProp := streams.NewActivityStreamsFollowersProperty()
+	followersProp.SetIRI(followersURI)
+	person.SetActivityStreamsFollowers(followersProp)
+
+	// inbox
+	// the activitypub inbox of this user for accepting messages
+	inboxURI, err := url.Parse(a.InboxURI)
+	if err != nil {
+		return nil, err
+	}
+	inboxProp := streams.NewActivityStreamsInboxProperty()
+	inboxProp.SetIRI(inboxURI)
+	person.SetActivityStreamsInbox(inboxProp)
+
+	// outbox
+	// the activitypub outbox of this user for serving messages
+	outboxURI, err := url.Parse(a.OutboxURI)
+	if err != nil {
+		return nil, err
+	}
+	outboxProp := streams.NewActivityStreamsOutboxProperty()
+	outboxProp.SetIRI(outboxURI)
+	person.SetActivityStreamsOutbox(outboxProp)
+
+	// featured posts
+	// Pinned posts.
+	featuredURI, err := url.Parse(a.FeaturedCollectionURI)
+	if err != nil {
+		return nil, err
+	}
+	featuredProp := streams.NewTootFeaturedProperty()
+	featuredProp.SetIRI(featuredURI)
+	person.SetTootFeatured(featuredProp)
+
+	// featuredTags
+	// NOT IMPLEMENTED
+
+	// preferredUsername
+	// Used for Webfinger lookup. Must be unique on the domain, and must correspond to a Webfinger acct: URI.
+	preferredUsernameProp := streams.NewActivityStreamsPreferredUsernameProperty()
+	preferredUsernameProp.SetXMLSchemaString(a.Username)
+	person.SetActivityStreamsPreferredUsername(preferredUsernameProp)
+
+	// name
+	// Used as profile display name.
+	nameProp := streams.NewActivityStreamsNameProperty()
+	if a.Username != "" {
+		nameProp.AppendXMLSchemaString(a.DisplayName)
+	} else {
+		nameProp.AppendXMLSchemaString(a.Username)
+	}
+	person.SetActivityStreamsName(nameProp)
+
+	// summary
+	// Used as profile bio.
+	if a.Note != "" {
+		summaryProp := streams.NewActivityStreamsSummaryProperty()
+		summaryProp.AppendXMLSchemaString(a.Note)
+		person.SetActivityStreamsSummary(summaryProp)
+	}
+
+	// url
+	// Used as profile link.
+	profileURL, err := url.Parse(a.URL)
+	if err != nil {
+		return nil, err
+	}
+	urlProp := streams.NewActivityStreamsUrlProperty()
+	urlProp.AppendIRI(profileURL)
+	person.SetActivityStreamsUrl(urlProp)
+
+	// manuallyApprovesFollowers
+	// Will be shown as a locked account.
+	// TODO: NOT IMPLEMENTED **YET** -- this needs to be added as an activitypub extension to https://github.com/go-fed/activity, see https://github.com/go-fed/activity/tree/master/astool
+
+	// discoverable
+	// Will be shown in the profile directory.
+	discoverableProp := streams.NewTootDiscoverableProperty()
+	discoverableProp.Set(a.Discoverable)
+	person.SetTootDiscoverable(discoverableProp)
+
+	// devices
+	// NOT IMPLEMENTED, probably won't implement
+
+	// alsoKnownAs
+	// Required for Move activity.
+	// TODO: NOT IMPLEMENTED **YET** -- this needs to be added as an activitypub extension to https://github.com/go-fed/activity, see https://github.com/go-fed/activity/tree/master/astool
+
+	// publicKey
+	// Required for signatures.
+	publicKeyProp := streams.NewW3IDSecurityV1PublicKeyProperty()
+
+	// create the public key
+	publicKey := streams.NewW3IDSecurityV1PublicKey()
+
+	// set ID for the public key
+	publicKeyIDProp := streams.NewJSONLDIdProperty()
+	publicKeyURI, err := url.Parse(a.PublicKeyURI)
+	if err != nil {
+		return nil, err
+	}
+	publicKeyIDProp.SetIRI(publicKeyURI)
+	publicKey.SetJSONLDId(publicKeyIDProp)
+
+	// set owner for the public key
+	publicKeyOwnerProp := streams.NewW3IDSecurityV1OwnerProperty()
+	publicKeyOwnerProp.SetIRI(profileIDURI)
+	publicKey.SetW3IDSecurityV1Owner(publicKeyOwnerProp)
+
+	// set the pem key itself
+	encodedPublicKey, err := x509.MarshalPKIXPublicKey(a.PublicKey)
+	if err != nil {
+		return nil, err
+	}
+	publicKeyBytes := pem.EncodeToMemory(&pem.Block{
+		Type:  "PUBLIC KEY",
+		Bytes: encodedPublicKey,
+	})
+	publicKeyPEMProp := streams.NewW3IDSecurityV1PublicKeyPemProperty()
+	publicKeyPEMProp.Set(string(publicKeyBytes))
+	publicKey.SetW3IDSecurityV1PublicKeyPem(publicKeyPEMProp)
+
+	// append the public key to the public key property
+	publicKeyProp.AppendW3IDSecurityV1PublicKey(publicKey)
+
+	// set the public key property on the Person
+	person.SetW3IDSecurityV1PublicKey(publicKeyProp)
+
+	// tag
+	// TODO: Any tags used in the summary of this profile
+
+	// attachment
+	// Used for profile fields.
+	// TODO: The PropertyValue type has to be added: https://schema.org/PropertyValue
+
+	// endpoints
+	// NOT IMPLEMENTED -- this is for shared inbox which we don't use
+
+	// icon
+	// Used as profile avatar.
+	if a.AvatarMediaAttachmentID != "" {
+		iconProperty := streams.NewActivityStreamsIconProperty()
+
+		iconImage := streams.NewActivityStreamsImage()
+
+		avatar := &gtsmodel.MediaAttachment{}
+		if err := c.db.GetByID(a.AvatarMediaAttachmentID, avatar); err != nil {
+			return nil, err
+		}
+
+		mediaType := streams.NewActivityStreamsMediaTypeProperty()
+		mediaType.Set(avatar.File.ContentType)
+		iconImage.SetActivityStreamsMediaType(mediaType)
+
+		avatarURLProperty := streams.NewActivityStreamsUrlProperty()
+		avatarURL, err := url.Parse(avatar.URL)
+		if err != nil {
+			return nil, err
+		}
+		avatarURLProperty.AppendIRI(avatarURL)
+		iconImage.SetActivityStreamsUrl(avatarURLProperty)
+
+		iconProperty.AppendActivityStreamsImage(iconImage)
+		person.SetActivityStreamsIcon(iconProperty)
+	}
+
+	// image
+	// Used as profile header.
+	if a.HeaderMediaAttachmentID != "" {
+		headerProperty := streams.NewActivityStreamsImageProperty()
+
+		headerImage := streams.NewActivityStreamsImage()
+
+		header := &gtsmodel.MediaAttachment{}
+		if err := c.db.GetByID(a.HeaderMediaAttachmentID, header); err != nil {
+			return nil, err
+		}
+
+		mediaType := streams.NewActivityStreamsMediaTypeProperty()
+		mediaType.Set(header.File.ContentType)
+		headerImage.SetActivityStreamsMediaType(mediaType)
+
+		headerURLProperty := streams.NewActivityStreamsUrlProperty()
+		headerURL, err := url.Parse(header.URL)
+		if err != nil {
+			return nil, err
+		}
+		headerURLProperty.AppendIRI(headerURL)
+		headerImage.SetActivityStreamsUrl(headerURLProperty)
+
+		headerProperty.AppendActivityStreamsImage(headerImage)
+	}
+
+	return person, nil
+}
+
+func (c *converter) StatusToAS(s *gtsmodel.Status) (vocab.ActivityStreamsNote, error) {
+	return nil, nil
+}