Enrich all users with relation info

This adds the relation info to the user representations in lists where
it was missing until now.

core/comment.go

@@ -201,6 +201,13 @@ func CommentList(
 			return nil, err
 		}
 
+		for _, u := range um {
+			err = enrichRelation(connections, currentApp, origin, u)
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		return &CommentFeed{Comments: cs, UserMap: um}, nil
 	}
 }
@@ -254,6 +261,7 @@ type CommentUpdateFunc func(
 	new *object.Object,
 ) (*object.Object, error)
 
+// CommentUpdate replaces the given comment with new values.
 func CommentUpdate(
 	objects object.Service,
 ) CommentUpdateFunc {
@@ -306,6 +314,7 @@ func CommentUpdate(
 	}
 }
 
+// IsComment indicates if Object is a comment.
 func IsComment(o *object.Object) bool {
 	if o.Type != TypeComment {
 		return false

core/connection.go

@@ -98,6 +98,13 @@ func ConnectionByState(
 			return nil, err
 		}
 
+		for _, u := range um {
+			err = enrichRelation(connections, currentApp, origin, u)
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		return &ConnectionFeed{
 			Connections: cons,
 			UserMap:     um,

core/like.go

@@ -242,6 +242,13 @@ func LikeList(
 			return nil, err
 		}
 
+		for _, u := range um {
+			err = enrichRelation(connections, currentApp, origin, u)
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		return &LikeFeed{
 			Likes:   es,
 			UserMap: um,
@@ -256,7 +263,7 @@ type LikesUserFunc func(
 	opts event.QueryOptions,
 ) (*LikeFeed, error)
 
-// LikesUserFunc returns all Likes for the given user.
+// LikesUser returns all Likes for the given user.
 func LikesUser(
 	connections connection.Service,
 	events event.Service,
@@ -321,6 +328,13 @@ func LikesUser(
 			return nil, err
 		}
 
+		for _, u := range um {
+			err = enrichRelation(connections, currentApp, origin, u)
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		return &LikeFeed{
 			Likes:   ls,
 			PostMap: ps.toMap(),