allow dereferencing of groups (#256)

internal/federation/dereferencing/account.go

@@ -165,18 +165,30 @@ func (d *deref) dereferenceAccountable(ctx context.Context, username string, rem
 	}
 
 	switch t.GetTypeName() {
-	case ap.ActorPerson:
-		p, ok := t.(vocab.ActivityStreamsPerson)
-		if !ok {
-			return nil, errors.New("DereferenceAccountable: error resolving type as activitystreams person")
-		}
-		return p, nil
 	case ap.ActorApplication:
 		p, ok := t.(vocab.ActivityStreamsApplication)
 		if !ok {
 			return nil, errors.New("DereferenceAccountable: error resolving type as activitystreams application")
 		}
 		return p, nil
+	case ap.ActorGroup:
+		p, ok := t.(vocab.ActivityStreamsGroup)
+		if !ok {
+			return nil, errors.New("DereferenceAccountable: error resolving type as activitystreams group")
+		}
+		return p, nil
+	case ap.ActorOrganization:
+		p, ok := t.(vocab.ActivityStreamsOrganization)
+		if !ok {
+			return nil, errors.New("DereferenceAccountable: error resolving type as activitystreams organization")
+		}
+		return p, nil
+	case ap.ActorPerson:
+		p, ok := t.(vocab.ActivityStreamsPerson)
+		if !ok {
+			return nil, errors.New("DereferenceAccountable: error resolving type as activitystreams person")
+		}
+		return p, nil
 	case ap.ActorService:
 		p, ok := t.(vocab.ActivityStreamsService)
 		if !ok {

internal/federation/dereferencing/account_test.go

@@ -0,0 +1,57 @@
+/*
+   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 dereferencing_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type AccountTestSuite struct {
+	DereferencerStandardTestSuite
+}
+
+func (suite *AccountTestSuite) TestDereferenceGroup() {
+	fetchingAccount := suite.testAccounts["local_account_1"]
+
+	groupURL := testrig.URLMustParse("https://unknown-instance.com/groups/some_group")
+	group, new, err := suite.dereferencer.GetRemoteAccount(context.Background(), fetchingAccount.Username, groupURL, false)
+	suite.NoError(err)
+	suite.NotNil(group)
+	suite.NotNil(group)
+	suite.True(new)
+
+	// group values should be set
+	suite.Equal("https://unknown-instance.com/groups/some_group", group.URI)
+	suite.Equal("https://unknown-instance.com/@some_group", group.URL)
+
+	// group should be in the database
+	dbGroup, err := suite.db.GetAccountByURI(context.Background(), group.URI)
+	suite.NoError(err)
+	suite.Equal(group.ID, dbGroup.ID)
+	suite.Equal(ap.ActorGroup, dbGroup.ActorType)
+}
+
+func TestAccountTestSuite(t *testing.T) {
+	suite.Run(t, new(AccountTestSuite))
+}

internal/federation/dereferencing/dereferencer_test.go

@@ -45,7 +45,8 @@ type DereferencerStandardTestSuite struct {
 	storage *kv.KVStore
 
 	testRemoteStatuses    map[string]vocab.ActivityStreamsNote
-	testRemoteAccounts    map[string]vocab.ActivityStreamsPerson
+	testRemotePeople      map[string]vocab.ActivityStreamsPerson
+	testRemoteGroups      map[string]vocab.ActivityStreamsGroup
 	testRemoteAttachments map[string]testrig.RemoteAttachmentFile
 	testAccounts          map[string]*gtsmodel.Account
 
@@ -55,7 +56,8 @@ type DereferencerStandardTestSuite struct {
 func (suite *DereferencerStandardTestSuite) SetupSuite() {
 	suite.testAccounts = testrig.NewTestAccounts()
 	suite.testRemoteStatuses = testrig.NewTestFediStatuses()
-	suite.testRemoteAccounts = testrig.NewTestFediPeople()
+	suite.testRemotePeople = testrig.NewTestFediPeople()
+	suite.testRemoteGroups = testrig.NewTestFediGroups()
 	suite.testRemoteAttachments = testrig.NewTestFediAttachments("../../../testrig/media")
 }
 
@@ -89,8 +91,7 @@ func (suite *DereferencerStandardTestSuite) mockTransportController() transport.
 		responseType := ""
 		responseLength := 0
 
-		note, ok := suite.testRemoteStatuses[req.URL.String()]
-		if ok {
+		if note, ok := suite.testRemoteStatuses[req.URL.String()]; ok {
 			// the request is for a note that we have stored
 			noteI, err := streams.Serialize(note)
 			if err != nil {
@@ -104,8 +105,7 @@ func (suite *DereferencerStandardTestSuite) mockTransportController() transport.
 			responseType = "application/activity+json"
 		}
 
-		person, ok := suite.testRemoteAccounts[req.URL.String()]
-		if ok {
+		if person, ok := suite.testRemotePeople[req.URL.String()]; ok {
 			// the request is for a person that we have stored
 			personI, err := streams.Serialize(person)
 			if err != nil {
@@ -119,8 +119,21 @@ func (suite *DereferencerStandardTestSuite) mockTransportController() transport.
 			responseType = "application/activity+json"
 		}
 
-		attachment, ok := suite.testRemoteAttachments[req.URL.String()]
-		if ok {
+		if group, ok := suite.testRemoteGroups[req.URL.String()]; ok {
+			// the request is for a person that we have stored
+			groupI, err := streams.Serialize(group)
+			if err != nil {
+				panic(err)
+			}
+			groupJson, err := json.Marshal(groupI)
+			if err != nil {
+				panic(err)
+			}
+			responseBytes = groupJson
+			responseType = "application/activity+json"
+		}
+
+		if attachment, ok := suite.testRemoteAttachments[req.URL.String()]; ok {
 			responseBytes = attachment.Data
 			responseType = attachment.ContentType
 		}

testrig/testmodels.go

@@ -1327,6 +1327,37 @@ func NewTestFediPeople() map[string]vocab.ActivityStreamsPerson {
 	}
 }
 
+func NewTestFediGroups() map[string]vocab.ActivityStreamsGroup {
+	newGroup1Priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		panic(err)
+	}
+	newGroup1Pub := &newGroup1Priv.PublicKey
+
+	return map[string]vocab.ActivityStreamsGroup{
+		"https://unknown-instance.com/groups/some_group": newGroup(
+			URLMustParse("https://unknown-instance.com/groups/some_group"),
+			URLMustParse("https://unknown-instance.com/groups/some_group/following"),
+			URLMustParse("https://unknown-instance.com/groups/some_group/followers"),
+			URLMustParse("https://unknown-instance.com/groups/some_group/inbox"),
+			URLMustParse("https://unknown-instance.com/groups/some_group/outbox"),
+			URLMustParse("https://unknown-instance.com/groups/some_group/collections/featured"),
+			"some_group",
+			"This is a group about... something?",
+			"",
+			URLMustParse("https://unknown-instance.com/@some_group"),
+			true,
+			URLMustParse("https://unknown-instance.com/groups/some_group#main-key"),
+			newGroup1Pub,
+			nil,
+			"image/jpeg",
+			nil,
+			"image/png",
+			false,
+		),
+	}
+}
+
 // RemoteAttachmentFile mimics a remote (federated) attachment
 type RemoteAttachmentFile struct {
 	Data        []byte
@@ -1688,6 +1719,189 @@ func newPerson(
 	return person
 }
 
+func newGroup(
+	profileIDURI *url.URL,
+	followingURI *url.URL,
+	followersURI *url.URL,
+	inboxURI *url.URL,
+	outboxURI *url.URL,
+	featuredURI *url.URL,
+	username string,
+	displayName string,
+	note string,
+	profileURL *url.URL,
+	discoverable bool,
+	publicKeyURI *url.URL,
+	pkey *rsa.PublicKey,
+	avatarURL *url.URL,
+	avatarContentType string,
+	headerURL *url.URL,
+	headerContentType string,
+	manuallyApprovesFollowers bool) vocab.ActivityStreamsGroup {
+	group := streams.NewActivityStreamsGroup()
+
+	// id should be the activitypub URI of this group
+	// something like https://example.org/users/example_group
+	idProp := streams.NewJSONLDIdProperty()
+	idProp.SetIRI(profileIDURI)
+	group.SetJSONLDId(idProp)
+
+	// following
+	// The URI for retrieving a list of accounts this group is following
+	followingProp := streams.NewActivityStreamsFollowingProperty()
+	followingProp.SetIRI(followingURI)
+	group.SetActivityStreamsFollowing(followingProp)
+
+	// followers
+	// The URI for retrieving a list of this user's followers
+	followersProp := streams.NewActivityStreamsFollowersProperty()
+	followersProp.SetIRI(followersURI)
+	group.SetActivityStreamsFollowers(followersProp)
+
+	// inbox
+	// the activitypub inbox of this user for accepting messages
+	inboxProp := streams.NewActivityStreamsInboxProperty()
+	inboxProp.SetIRI(inboxURI)
+	group.SetActivityStreamsInbox(inboxProp)
+
+	// outbox
+	// the activitypub outbox of this user for serving messages
+	outboxProp := streams.NewActivityStreamsOutboxProperty()
+	outboxProp.SetIRI(outboxURI)
+	group.SetActivityStreamsOutbox(outboxProp)
+
+	// featured posts
+	// Pinned posts.
+	featuredProp := streams.NewTootFeaturedProperty()
+	featuredProp.SetIRI(featuredURI)
+	group.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(username)
+	group.SetActivityStreamsPreferredUsername(preferredUsernameProp)
+
+	// name
+	// Used as profile display name.
+	nameProp := streams.NewActivityStreamsNameProperty()
+	if displayName != "" {
+		nameProp.AppendXMLSchemaString(displayName)
+	} else {
+		nameProp.AppendXMLSchemaString(username)
+	}
+	group.SetActivityStreamsName(nameProp)
+
+	// summary
+	// Used as profile bio.
+	if note != "" {
+		summaryProp := streams.NewActivityStreamsSummaryProperty()
+		summaryProp.AppendXMLSchemaString(note)
+		group.SetActivityStreamsSummary(summaryProp)
+	}
+
+	// url
+	// Used as profile link.
+	urlProp := streams.NewActivityStreamsUrlProperty()
+	urlProp.AppendIRI(profileURL)
+	group.SetActivityStreamsUrl(urlProp)
+
+	// manuallyApprovesFollowers
+	manuallyApprovesFollowersProp := streams.NewActivityStreamsManuallyApprovesFollowersProperty()
+	manuallyApprovesFollowersProp.Set(manuallyApprovesFollowers)
+	group.SetActivityStreamsManuallyApprovesFollowers(manuallyApprovesFollowersProp)
+
+	// discoverable
+	// Will be shown in the profile directory.
+	discoverableProp := streams.NewTootDiscoverableProperty()
+	discoverableProp.Set(discoverable)
+	group.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()
+	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(pkey)
+	if err != nil {
+		panic(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
+	group.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.
+	iconProperty := streams.NewActivityStreamsIconProperty()
+	iconImage := streams.NewActivityStreamsImage()
+	mediaType := streams.NewActivityStreamsMediaTypeProperty()
+	mediaType.Set(avatarContentType)
+	iconImage.SetActivityStreamsMediaType(mediaType)
+	avatarURLProperty := streams.NewActivityStreamsUrlProperty()
+	avatarURLProperty.AppendIRI(avatarURL)
+	iconImage.SetActivityStreamsUrl(avatarURLProperty)
+	iconProperty.AppendActivityStreamsImage(iconImage)
+	group.SetActivityStreamsIcon(iconProperty)
+
+	// image
+	// Used as profile header.
+	headerProperty := streams.NewActivityStreamsImageProperty()
+	headerImage := streams.NewActivityStreamsImage()
+	headerMediaType := streams.NewActivityStreamsMediaTypeProperty()
+	mediaType.Set(headerContentType)
+	headerImage.SetActivityStreamsMediaType(headerMediaType)
+	headerURLProperty := streams.NewActivityStreamsUrlProperty()
+	headerURLProperty.AppendIRI(headerURL)
+	headerImage.SetActivityStreamsUrl(headerURLProperty)
+	headerProperty.AppendActivityStreamsImage(headerImage)
+	group.SetActivityStreamsImage(headerProperty)
+
+	return group
+}
+
 func newMention(uri *url.URL, namestring string) vocab.ActivityStreamsMention {
 	mention := streams.NewActivityStreamsMention()