add webfinger "profile-page" support (for public profiles only)

lib/Travelynx.pm

@@ -2182,6 +2182,7 @@ sub startup {
 	$r->get('/ajax/status/:name/:ts')->to('traveling#public_status_card');
 	$r->get('/p/:name')->to('traveling#public_profile');
 	$r->get('/p/:name/j/:id')->to('traveling#public_journey_details');
+	$r->get('/.well-known/webfinger')->to('account#webfinger');
 	$r->post('/api/v1/import')->to('api#import_v1');
 	$r->post('/api/v1/travel')->to('api#travel_v1');
 	$r->post('/action')->to('traveling#travel_action');

lib/Travelynx/Controller/Account.pm

@@ -6,7 +6,8 @@ package Travelynx::Controller::Account;
 use Mojo::Base 'Mojolicious::Controller';
 
 use Crypt::Eksblowfish::Bcrypt qw(bcrypt en_base64);
-use UUID::Tiny                 qw(:std);
+use JSON;
+use UUID::Tiny qw(:std);
 
 # Internal Helpers
 
@@ -967,4 +968,51 @@ sub json_export {
 	);
 }
 
+sub webfinger {
+	my ($self) = @_;
+
+	my $resource = $self->param('resource');
+
+	if ( not $resource ) {
+		$self->render('not_found');
+		return;
+	}
+
+	my $root_url = $self->url_for('/')->host;
+
+	if (   not $root_url
+		or not $resource =~ m{ ^ (?<name> [^@]+ ) [@] $root_url $ }x )
+	{
+		$self->render('not_found');
+		return;
+	}
+
+	my $name = $+{name};
+	my $user = $self->users->get_privacy_by_name( name => $name );
+
+	if ( not $user or not $user->{public_level} & 0x22 ) {
+		$self->render('not_found');
+	}
+
+	my $profile_url
+	  = $self->url_for("/p/${name}")->to_abs->scheme('https')->to_string;
+
+	$self->render(
+		text => JSON->new->encode(
+			{
+				subject => "acct:${resource}",
+				aliases => [ $profile_url, ],
+				links   => [
+					{
+						rel  => 'http://webfinger.net/rel/profile-page',
+						type => 'text/html',
+						href => $profile_url,
+					},
+				],
+			}
+		),
+		format => 'json',
+	);
+}
+
 1;