Follows and relationships (#27)

* Follows -- create and undo, both remote and local
* Statuses -- federate new posts, including media, attachments, CWs and image descriptions.

6 files changed, 116 insertions, 63 deletions

diff --git a/internal/gtsmodel/account.go b/internal/gtsmodel/account.go
index 56c401e62..d6ce95cc9 100644
--- a/internal/gtsmodel/account.go
+++ b/internal/gtsmodel/account.go
@@ -76,13 +76,13 @@ type Account struct {
 	*/
 
 	// Does this account need an approval for new followers?
-	Locked bool `pg:",default:'true'"`
+	Locked bool
 	// Should this account be shown in the instance's profile directory?
 	Discoverable bool
 	// Default post privacy for this account
 	Privacy Visibility
 	// Set posts from this account to sensitive by default?
-	Sensitive bool `pg:",default:'false'"`
+	Sensitive bool
 	// What language does this account post in?
 	Language string `pg:",default:'en'"`
 
@@ -107,7 +107,7 @@ type Account struct {
 	// URL for getting the featured collection list of this account
 	FeaturedCollectionURI string `pg:",unique"`
 	// What type of activitypub actor is this account?
-	ActorType ActivityStreamsActor
+	ActorType string
 	// This account is associated with x account id
 	AlsoKnownAs string
 
diff --git a/internal/gtsmodel/activitystreams.go b/internal/gtsmodel/activitystreams.go
index f852340bb..3fe6107b5 100644
--- a/internal/gtsmodel/activitystreams.go
+++ b/internal/gtsmodel/activitystreams.go
@@ -18,110 +18,101 @@
 
 package gtsmodel
 
-// ActivityStreamsObject refers to https://www.w3.org/TR/activitystreams-vocabulary/#object-types
-type ActivityStreamsObject string
-
 const (
 	// ActivityStreamsArticle https://www.w3.org/TR/activitystreams-vocabulary/#dfn-article
-	ActivityStreamsArticle ActivityStreamsObject = "Article"
+	ActivityStreamsArticle = "Article"
 	// ActivityStreamsAudio https://www.w3.org/TR/activitystreams-vocabulary/#dfn-audio
-	ActivityStreamsAudio ActivityStreamsObject = "Audio"
+	ActivityStreamsAudio = "Audio"
 	// ActivityStreamsDocument https://www.w3.org/TR/activitystreams-vocabulary/#dfn-document
-	ActivityStreamsDocument ActivityStreamsObject = "Event"
+	ActivityStreamsDocument = "Event"
 	// ActivityStreamsEvent https://www.w3.org/TR/activitystreams-vocabulary/#dfn-event
-	ActivityStreamsEvent ActivityStreamsObject = "Event"
+	ActivityStreamsEvent = "Event"
 	// ActivityStreamsImage https://www.w3.org/TR/activitystreams-vocabulary/#dfn-image
-	ActivityStreamsImage ActivityStreamsObject = "Image"
+	ActivityStreamsImage = "Image"
 	// ActivityStreamsNote https://www.w3.org/TR/activitystreams-vocabulary/#dfn-note
-	ActivityStreamsNote ActivityStreamsObject = "Note"
+	ActivityStreamsNote = "Note"
 	// ActivityStreamsPage https://www.w3.org/TR/activitystreams-vocabulary/#dfn-page
-	ActivityStreamsPage ActivityStreamsObject = "Page"
+	ActivityStreamsPage = "Page"
 	// ActivityStreamsPlace https://www.w3.org/TR/activitystreams-vocabulary/#dfn-place
-	ActivityStreamsPlace ActivityStreamsObject = "Place"
+	ActivityStreamsPlace = "Place"
 	// ActivityStreamsProfile https://www.w3.org/TR/activitystreams-vocabulary/#dfn-profile
-	ActivityStreamsProfile ActivityStreamsObject = "Profile"
+	ActivityStreamsProfile = "Profile"
 	// ActivityStreamsRelationship https://www.w3.org/TR/activitystreams-vocabulary/#dfn-relationship
-	ActivityStreamsRelationship ActivityStreamsObject = "Relationship"
+	ActivityStreamsRelationship = "Relationship"
 	// ActivityStreamsTombstone https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tombstone
-	ActivityStreamsTombstone ActivityStreamsObject = "Tombstone"
+	ActivityStreamsTombstone = "Tombstone"
 	// ActivityStreamsVideo https://www.w3.org/TR/activitystreams-vocabulary/#dfn-video
-	ActivityStreamsVideo ActivityStreamsObject = "Video"
+	ActivityStreamsVideo = "Video"
 )
 
-// ActivityStreamsActor refers to https://www.w3.org/TR/activitystreams-vocabulary/#actor-types
-type ActivityStreamsActor string
-
 const (
 	// ActivityStreamsApplication https://www.w3.org/TR/activitystreams-vocabulary/#dfn-application
-	ActivityStreamsApplication ActivityStreamsActor = "Application"
+	ActivityStreamsApplication = "Application"
 	// ActivityStreamsGroup https://www.w3.org/TR/activitystreams-vocabulary/#dfn-group
-	ActivityStreamsGroup ActivityStreamsActor = "Group"
+	ActivityStreamsGroup = "Group"
 	// ActivityStreamsOrganization https://www.w3.org/TR/activitystreams-vocabulary/#dfn-organization
-	ActivityStreamsOrganization ActivityStreamsActor = "Organization"
+	ActivityStreamsOrganization = "Organization"
 	// ActivityStreamsPerson https://www.w3.org/TR/activitystreams-vocabulary/#dfn-person
-	ActivityStreamsPerson ActivityStreamsActor = "Person"
+	ActivityStreamsPerson = "Person"
 	// ActivityStreamsService https://www.w3.org/TR/activitystreams-vocabulary/#dfn-service
-	ActivityStreamsService ActivityStreamsActor = "Service"
+	ActivityStreamsService = "Service"
 )
 
-// ActivityStreamsActivity refers to https://www.w3.org/TR/activitystreams-vocabulary/#activity-types
-type ActivityStreamsActivity string
-
 const (
 	// ActivityStreamsAccept https://www.w3.org/TR/activitystreams-vocabulary/#dfn-accept
-	ActivityStreamsAccept ActivityStreamsActivity = "Accept"
+	ActivityStreamsAccept = "Accept"
 	// ActivityStreamsAdd https://www.w3.org/TR/activitystreams-vocabulary/#dfn-add
-	ActivityStreamsAdd ActivityStreamsActivity = "Add"
+	ActivityStreamsAdd = "Add"
 	// ActivityStreamsAnnounce https://www.w3.org/TR/activitystreams-vocabulary/#dfn-announce
-	ActivityStreamsAnnounce ActivityStreamsActivity = "Announce"
+	ActivityStreamsAnnounce = "Announce"
 	// ActivityStreamsArrive https://www.w3.org/TR/activitystreams-vocabulary/#dfn-arrive
-	ActivityStreamsArrive ActivityStreamsActivity = "Arrive"
+	ActivityStreamsArrive = "Arrive"
 	// ActivityStreamsBlock https://www.w3.org/TR/activitystreams-vocabulary/#dfn-block
-	ActivityStreamsBlock ActivityStreamsActivity = "Block"
+	ActivityStreamsBlock = "Block"
 	// ActivityStreamsCreate https://www.w3.org/TR/activitystreams-vocabulary/#dfn-create
-	ActivityStreamsCreate ActivityStreamsActivity = "Create"
+	ActivityStreamsCreate = "Create"
 	// ActivityStreamsDelete https://www.w3.org/TR/activitystreams-vocabulary/#dfn-delete
-	ActivityStreamsDelete ActivityStreamsActivity = "Delete"
+	ActivityStreamsDelete = "Delete"
 	// ActivityStreamsDislike https://www.w3.org/TR/activitystreams-vocabulary/#dfn-dislike
-	ActivityStreamsDislike ActivityStreamsActivity = "Dislike"
+	ActivityStreamsDislike = "Dislike"
 	// ActivityStreamsFlag https://www.w3.org/TR/activitystreams-vocabulary/#dfn-flag
-	ActivityStreamsFlag ActivityStreamsActivity = "Flag"
+	ActivityStreamsFlag = "Flag"
 	// ActivityStreamsFollow https://www.w3.org/TR/activitystreams-vocabulary/#dfn-follow
-	ActivityStreamsFollow ActivityStreamsActivity = "Follow"
+	ActivityStreamsFollow = "Follow"
 	// ActivityStreamsIgnore https://www.w3.org/TR/activitystreams-vocabulary/#dfn-ignore
-	ActivityStreamsIgnore ActivityStreamsActivity = "Ignore"
+	ActivityStreamsIgnore = "Ignore"
 	// ActivityStreamsInvite https://www.w3.org/TR/activitystreams-vocabulary/#dfn-invite
-	ActivityStreamsInvite ActivityStreamsActivity = "Invite"
+	ActivityStreamsInvite = "Invite"
 	// ActivityStreamsJoin https://www.w3.org/TR/activitystreams-vocabulary/#dfn-join
-	ActivityStreamsJoin ActivityStreamsActivity = "Join"
+	ActivityStreamsJoin = "Join"
 	// ActivityStreamsLeave https://www.w3.org/TR/activitystreams-vocabulary/#dfn-leave
-	ActivityStreamsLeave ActivityStreamsActivity = "Leave"
+	ActivityStreamsLeave = "Leave"
 	// ActivityStreamsLike https://www.w3.org/TR/activitystreams-vocabulary/#dfn-like
-	ActivityStreamsLike ActivityStreamsActivity = "Like"
+	ActivityStreamsLike = "Like"
 	// ActivityStreamsListen https://www.w3.org/TR/activitystreams-vocabulary/#dfn-listen
-	ActivityStreamsListen ActivityStreamsActivity = "Listen"
+	ActivityStreamsListen = "Listen"
 	// ActivityStreamsMove https://www.w3.org/TR/activitystreams-vocabulary/#dfn-move
-	ActivityStreamsMove ActivityStreamsActivity = "Move"
+	ActivityStreamsMove = "Move"
 	// ActivityStreamsOffer https://www.w3.org/TR/activitystreams-vocabulary/#dfn-offer
-	ActivityStreamsOffer ActivityStreamsActivity = "Offer"
+	ActivityStreamsOffer = "Offer"
 	// ActivityStreamsQuestion https://www.w3.org/TR/activitystreams-vocabulary/#dfn-question
-	ActivityStreamsQuestion ActivityStreamsActivity = "Question"
+	ActivityStreamsQuestion = "Question"
 	// ActivityStreamsReject https://www.w3.org/TR/activitystreams-vocabulary/#dfn-reject
-	ActivityStreamsReject ActivityStreamsActivity = "Reject"
+	ActivityStreamsReject = "Reject"
 	// ActivityStreamsRead https://www.w3.org/TR/activitystreams-vocabulary/#dfn-read
-	ActivityStreamsRead ActivityStreamsActivity = "Read"
+	ActivityStreamsRead = "Read"
 	// ActivityStreamsRemove https://www.w3.org/TR/activitystreams-vocabulary/#dfn-remove
-	ActivityStreamsRemove ActivityStreamsActivity = "Remove"
+	ActivityStreamsRemove = "Remove"
 	// ActivityStreamsTentativeReject https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tentativereject
-	ActivityStreamsTentativeReject ActivityStreamsActivity = "TentativeReject"
+	ActivityStreamsTentativeReject = "TentativeReject"
 	// ActivityStreamsTentativeAccept https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tentativeaccept
-	ActivityStreamsTentativeAccept ActivityStreamsActivity = "TentativeAccept"
+	ActivityStreamsTentativeAccept = "TentativeAccept"
 	// ActivityStreamsTravel https://www.w3.org/TR/activitystreams-vocabulary/#dfn-travel
-	ActivityStreamsTravel ActivityStreamsActivity = "Travel"
+	ActivityStreamsTravel = "Travel"
 	// ActivityStreamsUndo https://www.w3.org/TR/activitystreams-vocabulary/#dfn-undo
-	ActivityStreamsUndo ActivityStreamsActivity = "Undo"
+	ActivityStreamsUndo = "Undo"
 	// ActivityStreamsUpdate https://www.w3.org/TR/activitystreams-vocabulary/#dfn-update
-	ActivityStreamsUpdate ActivityStreamsActivity = "Update"
+	ActivityStreamsUpdate = "Update"
 	// ActivityStreamsView https://www.w3.org/TR/activitystreams-vocabulary/#dfn-view
-	ActivityStreamsView ActivityStreamsActivity = "View"
+	ActivityStreamsView = "View"
 )
diff --git a/internal/gtsmodel/mention.go b/internal/gtsmodel/mention.go
index 8e56a1b36..3abe9c915 100644
--- a/internal/gtsmodel/mention.go
+++ b/internal/gtsmodel/mention.go
@@ -38,6 +38,14 @@ type Mention struct {
 	TargetAccountID string `pg:",notnull"`
 	// Prevent this mention from generating a notification?
 	Silent bool
+
+	/*
+		NON-DATABASE CONVENIENCE FIELDS
+		These fields are just for convenience while passing the mention
+		around internally, to make fewer database calls and whatnot. They're
+		not meant to be put in the database!
+	*/
+
 	// NameString is for putting in the namestring of the mentioned user
 	// before the mention is dereferenced. Should be in a form along the lines of:
 	// @whatever_username@example.org
@@ -48,4 +56,6 @@ type Mention struct {
 	//
 	// This will not be put in the database, it's just for convenience.
 	MentionedAccountURI string `pg:"-"`
+	// A pointer to the gtsmodel account of the mentioned account.
+	GTSAccount *Account `pg:"-"`
 }
diff --git a/internal/gtsmodel/messages.go b/internal/gtsmodel/messages.go
index 43f30634a..910c74898 100644
--- a/internal/gtsmodel/messages.go
+++ b/internal/gtsmodel/messages.go
@@ -9,9 +9,11 @@ package gtsmodel
 
 // FromClientAPI wraps a message that travels from client API into the processor
 type FromClientAPI struct {
-	APObjectType   ActivityStreamsObject
-	APActivityType ActivityStreamsActivity
+	APObjectType   string
+	APActivityType string
 	GTSModel       interface{}
+	OriginAccount  *Account
+	TargetAccount  *Account
 }
 
 // // ToFederator wraps a message that travels from the processor into the federator
@@ -23,7 +25,8 @@ type FromClientAPI struct {
 
 // FromFederator wraps a message that travels from the federator into the processor
 type FromFederator struct {
-	APObjectType   ActivityStreamsObject
-	APActivityType ActivityStreamsActivity
-	GTSModel       interface{}
+	APObjectType     string
+	APActivityType   string
+	GTSModel         interface{}
+	ReceivingAccount *Account
 }
diff --git a/internal/gtsmodel/relationship.go b/internal/gtsmodel/relationship.go
new file mode 100644
index 000000000..4e6cc03f6
--- /dev/null
+++ b/internal/gtsmodel/relationship.go
@@ -0,0 +1,49 @@
+/*
+   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
+
+// Relationship describes a requester's relationship with another account.
+type Relationship struct {
+	// The account id.
+	ID string
+	// Are you following this user?
+	Following bool
+	// Are you receiving this user's boosts in your home timeline?
+	ShowingReblogs bool
+	// Have you enabled notifications for this user?
+	Notifying bool
+	// Are you followed by this user?
+	FollowedBy bool
+	// Are you blocking this user?
+	Blocking bool
+	// Is this user blocking you?
+	BlockedBy bool
+	// Are you muting this user?
+	Muting bool
+	// Are you muting notifications from this user?
+	MutingNotifications bool
+	// Do you have a pending follow request for this user?
+	Requested bool
+	// Are you blocking this user's domain?
+	DomainBlocking bool
+	// Are you featuring this user on your profile?
+	Endorsed bool
+	// Your note on this account.
+	Note string
+}
diff --git a/internal/gtsmodel/status.go b/internal/gtsmodel/status.go
index d0d479520..b5ac8def1 100644
--- a/internal/gtsmodel/status.go
+++ b/internal/gtsmodel/status.go
@@ -66,7 +66,7 @@ type Status struct {
 	VisibilityAdvanced *VisibilityAdvanced
 	// What is the activitystreams type of this status? See: https://www.w3.org/TR/activitystreams-vocabulary/#object-types
 	// Will probably almost always be Note but who knows!.
-	ActivityStreamsType ActivityStreamsObject
+	ActivityStreamsType string
 	// Original text of the status without formatting
 	Text string
 	// Has this status been pinned by its owner?