followee list: show if accounts are following back

lib/Travelynx/Command/database.pm

@@ -1780,6 +1780,29 @@ my @migrations = (
 			}
 		);
 	},
+
+	# v43 -> v44
+	# show inverse relation in followees as well
+	sub {
+		my ($db) = @_;
+		$db->query(
+			qq{
+				drop view followees;
+				create view followees as select
+					relations.subject_id as self_id,
+					users.id as id,
+					users.name as name,
+					r2.predicate as inverse_predicate
+					from relations
+					join users on relations.object_id = users.id
+					left join relations as r2
+					on relations.subject_id = r2.object_id
+					and relations.object_id = r2.subject_id
+					where relations.predicate = 1;
+				update schema_version set version = 44;
+			}
+		);
+	},
 );
 
 # TODO add 'hafas' column to in_transit (and maybe journeys? undo/redo needs something to work with...)

lib/Travelynx/Model/Users.pm

@@ -1123,9 +1123,27 @@ sub get_followees {
 	my $db  = $opt{db} // $self->{pg}->db;
 	my $uid = $opt{uid};
 
-	my $res = $db->select( 'followees', [ 'id', 'name' ], { self_id => $uid } );
+	my $res = $db->select(
+		'followees',
+		[ 'id', 'name', 'inverse_predicate' ],
+		{ self_id => $uid }
+	);
 
-	return $res->hashes->each;
+	my @ret;
+	while ( my $row = $res->hash ) {
+		push(
+			@ret,
+			{
+				id             => $row->{id},
+				name           => $row->{name},
+				following_back => (
+					      $row->{inverse_predicate}
+					  and $row->{inverse_predicate} == $predicate_atoi{follows}
+				) ? 1 : 0,
+			}
+		);
+	}
+	return @ret;
 }
 
 sub has_followees {

templates/social_list.html.ep

@@ -130,7 +130,10 @@
 		</div>
 	</div>
 	<div class="row center-align">
-		<div class="col s12">
+		<div class="col s6">
+			<i class="material-icons">group</i><br/> Folgt dir
+		</div>
+		<div class="col s6">
 			<i class="material-icons">remove</i><br/> Nicht mehr folgen
 		</div>
 	</div>
@@ -230,6 +233,11 @@
 							</td>
 						% }
 						% elsif ($type eq 'follows') {
+							<td class="right-align">
+								% if ($entry->{following_back}) {
+									<i class="material-icons" aria-label="ihr folgt euch gegenseitig">group</i>
+								% }
+							</td>
 							<td class="right-align">
 								<button class="btn-flat waves-effect waves-light" type="submit" name="unfollow" value="<%= $entry->{id} %>">
 									<i class="material-icons" aria-label="entfolgen">remove</i>