Add inbox follow request handling

- Not tested yet
- Undo needs to be extended to also handle undo of follow

storage-new/models/ActivityTargetType.go

@@ -11,6 +11,7 @@ const (
 	ActivitystreamsActivityTargetUser
 	ActivitystreamsActivityTargetBoost
 	ActivitystreamsActivityTargetReaction
+	ActivitystreamsActivityTargetFollow
 )
 
 func (n *ActivitystreamsActivityTargetType) Value() (driver.Value, error) {
@@ -29,4 +30,5 @@ var AllActivitystreamsActivityTargetTypes = []ActivitystreamsActivityTargetType{
 	ActivitystreamsActivityTargetUser,
 	ActivitystreamsActivityTargetBoost,
 	ActivitystreamsActivityTargetReaction,
+	ActivitystreamsActivityTargetFollow,
 }

storage-new/models/UserRelationType.go

@@ -7,6 +7,7 @@ type RelationType string
 
 const (
 	RelationFollow        RelationType = "follow"         // X follows Y
+	RelationFollowRequest RelationType = "follow-request" // X has requested to follow Y but is not yet following Y
 	RelationMute          RelationType = "mute"           // X has Y muted (X doesn't see Y, but Y still X)
 	RelationNoBoosts      RelationType = "no-boosts"      // X has Ys boosts muted
 	RelationBlock         RelationType = "block"          // X has Y blocked (X doesn't see Y and Y doesn't see X)

storage-new/models/UserToUserRelation.go

@@ -9,5 +9,5 @@ type UserToUserRelation struct {
 	UserId       string
 	TargetUser   User // The user Y described in [RelationType]
 	TargetUserId string
-	Relation     RelationType `gorm:"type:relation_type"`
+	Relation     string `gorm:"type:relation_type"`
 }