package Travelynx;

# Copyright (C) 2020-2023 Birte Kristina Friesel
#
# SPDX-License-Identifier: AGPL-3.0-or-later

use Mojo::Base 'Mojolicious';

use Mojo::Pg;
use Mojo::Promise;
use Mojolicious::Plugin::Authentication;
use Cache::File;
use Crypt::Eksblowfish::Bcrypt qw(bcrypt en_base64);
use DateTime;
use DateTime::Format::Strptime;
use Encode      qw(decode encode);
use File::Slurp qw(read_file);
use JSON;
use List::Util;
use List::UtilsBy   qw(uniq_by);
use List::MoreUtils qw(first_index);
use Travel::Status::DE::DBWagenreihung;
use Travelynx::Helper::DBDB;
use Travelynx::Helper::HAFAS;
use Travelynx::Helper::IRIS;
use Travelynx::Helper::Sendmail;
use Travelynx::Helper::Traewelling;
use Travelynx::Model::InTransit;
use Travelynx::Model::Journeys;
use Travelynx::Model::JourneyStatsCache;
use Travelynx::Model::Stations;
use Travelynx::Model::Traewelling;
use Travelynx::Model::Users;

sub check_password {
	my ( $password, $hash ) = @_;

	if ( bcrypt( substr( $password, 0, 10000 ), $hash ) eq $hash ) {
		return 1;
	}
	return 0;
}

sub epoch_to_dt {
	my ($epoch) = @_;

	# Bugs (and user errors) may lead to undefined timestamps. Set them to
	# 1970-01-01 to avoid crashing and show obviously wrong data instead.
	$epoch //= 0;

	return DateTime->from_epoch(
		epoch     => $epoch,
		time_zone => 'Europe/Berlin',
		locale    => 'de-DE',
	);
}

sub startup {
	my ($self) = @_;

	push( @{ $self->commands->namespaces }, 'Travelynx::Command' );

	$self->defaults( layout => 'default' );

	$self->types->type( csv  => 'text/csv; charset=utf-8' );
	$self->types->type( json => 'application/json; charset=utf-8' );

	$self->plugin('Config');

	if ( $self->config->{secrets} ) {
		$self->secrets( $self->config->{secrets} );
	}

	chomp $self->config->{version};
	$self->defaults( version => $self->config->{version} // 'UNKNOWN' );

	$self->plugin(
		authentication => {
			autoload_user => 1,
			fail_render   => { template => 'login' },
			load_user     => sub {
				my ( $self, $uid ) = @_;
				return $self->get_user_data($uid);
			},
			validate_user => sub {
				my ( $self, $username, $password, $extradata ) = @_;
				my $user_info
				  = $self->users->get_login_data( name => $username );
				if ( not $user_info ) {
					return undef;
				}
				if ( $user_info->{status} != 1 ) {
					return undef;
				}
				if ( check_password( $password, $user_info->{password_hash} ) )
				{
					return $user_info->{id};
				}
				return undef;
			},
		}
	);
	$self->sessions->default_expiration( 60 * 60 * 24 * 180 );

	# Starting with v8.11, Mojolicious sends SameSite=Lax Cookies by default.
	# In theory, "The default lax value provides a reasonable balance between
	# security and usability for websites that want to maintain user's logged-in
	# session after the user arrives from an external link". In practice,
	# Safari (both iOS and macOS) does not send a SameSite=lax cookie when
	# following a link from an external site. So, bahn.expert providing a
	# checkin link to travelynx.de/s/whatever does not work because the user
	# is not logged in due to Safari not sending the cookie.
	#
	# This looks a lot like a Safari bug, but we can't do anything about it. So
	# we don't set the SameSite flag at all for now.
	#
	# --derf, 2019-05-01
	$self->sessions->samesite(undef);

	$self->defaults( layout => 'default' );

	$self->hook(
		before_dispatch => sub {
			my ($self) = @_;

			# The "theme" cookie is set client-side if the theme we delivered was
			# changed by dark mode detection or by using the theme switcher. It's
			# not part of Mojolicious' session data (and can't be, due to
			# signing and HTTPOnly), so we need to add it here.
			for my $cookie ( @{ $self->req->cookies } ) {
				if ( $cookie->name eq 'theme' ) {
					$self->session( theme => $cookie->value );
					return;
				}
			}
		}
	);

	$self->attr(
		cache_iris_main => sub {
			my ($self) = @_;

			return Cache::File->new(
				cache_root      => $self->app->config->{cache}->{schedule},
				default_expires => '6 hours',
				lock_level      => Cache::File::LOCK_LOCAL(),
			);
		}
	);

	$self->attr(
		cache_iris_rt => sub {
			my ($self) = @_;

			return Cache::File->new(
				cache_root      => $self->app->config->{cache}->{realtime},
				default_expires => '70 seconds',
				lock_level      => Cache::File::LOCK_LOCAL(),
			);
		}
	);

	$self->attr(
		coordinates_by_station => sub {
			my $legacy_names = $self->app->renamed_station;
			my $location     = $self->stations->get_latlon_by_name;
			while ( my ( $old_name, $new_name ) = each %{$legacy_names} ) {
				$location->{$old_name} = $location->{$new_name};
			}
			return $location;
		}
	);

	# https://de.wikipedia.org/wiki/Liste_nach_Gemeinden_und_Regionen_benannter_IC/ICE-Fahrzeuge#Namensgebung_ICE-Triebz%C3%BCge_nach_Gemeinden
	# via https://github.com/marudor/bahn.expert/blob/main/src/server/coachSequence/TrainNames.ts
	$self->attr(
		ice_name => sub {
			my $id_to_name = JSON->new->utf8->decode(
				scalar read_file('share/ice_names.json') );
			return $id_to_name;
		}
	);

	$self->attr(
		renamed_station => sub {
			my $legacy_to_new = JSON->new->utf8->decode(
				scalar read_file('share/old_station_names.json') );
			return $legacy_to_new;
		}
	);

	if ( not $self->app->config->{base_url} ) {
		$self->app->log->error(
"travelynx.conf: 'base_url' is missing. Links in maintenance/work/worker-generated E-Mails will be incorrect. This variable was introduced in travelynx 1.22; see examples/travelynx.conf for documentation."
		);
	}

	$self->helper(
		base_url_for => sub {
			my ( $self, $path ) = @_;
			if ( ( my $url = $self->url_for($path) )->base ne q{}
				or not $self->app->config->{base_url} )
			{
				return $url;
			}
			return $self->url_for($path)
			  ->base( $self->app->config->{base_url} );
		}
	);

	$self->helper(
		hafas => sub {
			my ($self) = @_;
			state $hafas = Travelynx::Helper::HAFAS->new(
				log            => $self->app->log,
				main_cache     => $self->app->cache_iris_main,
				realtime_cache => $self->app->cache_iris_rt,
				root_url       => $self->base_url_for('/')->to_abs,
				user_agent     => $self->ua,
				version        => $self->app->config->{version},
			);
		}
	);

	$self->helper(
		iris => sub {
			my ($self) = @_;
			state $iris = Travelynx::Helper::IRIS->new(
				log            => $self->app->log,
				main_cache     => $self->app->cache_iris_main,
				realtime_cache => $self->app->cache_iris_rt,
				root_url       => $self->base_url_for('/')->to_abs,
				version        => $self->app->config->{version},
			);
		}
	);

	$self->helper(
		traewelling => sub {
			my ($self) = @_;
			state $trwl = Travelynx::Model::Traewelling->new( pg => $self->pg );
		}
	);

	$self->helper(
		traewelling_api => sub {
			my ($self) = @_;
			state $trwl_api = Travelynx::Helper::Traewelling->new(
				log        => $self->app->log,
				model      => $self->traewelling,
				root_url   => $self->base_url_for('/')->to_abs,
				user_agent => $self->ua,
				version    => $self->app->config->{version},
			);
		}
	);

	$self->helper(
		in_transit => sub {
			my ($self) = @_;
			state $in_transit = Travelynx::Model::InTransit->new(
				log => $self->app->log,
				pg  => $self->pg,
			);
		}
	);

	$self->helper(
		journey_stats_cache => sub {
			my ($self) = @_;
			state $journey_stats_cache
			  = Travelynx::Model::JourneyStatsCache->new(
				log => $self->app->log,
				pg  => $self->pg,
			  );
		}
	);

	$self->helper(
		journeys => sub {
			my ($self) = @_;
			state $journeys = Travelynx::Model::Journeys->new(
				log               => $self->app->log,
				pg                => $self->pg,
				in_transit        => $self->in_transit,
				stats_cache       => $self->journey_stats_cache,
				renamed_station   => $self->app->renamed_station,
				latlon_by_station => $self->app->coordinates_by_station,
				stations          => $self->stations,
			);
		}
	);

	$self->helper(
		pg => sub {
			my ($self) = @_;
			my $config = $self->app->config;

			my $dbname = $config->{db}->{database};
			my $host   = $config->{db}->{host} // 'localhost';
			my $port   = $config->{db}->{port} // 5432;
			my $user   = $config->{db}->{user};
			my $pw     = $config->{db}->{password};

			state $pg
			  = Mojo::Pg->new("postgresql://${user}\@${host}:${port}/${dbname}")
			  ->password($pw);

			$pg->on(
				connection => sub {
					my ( $pg, $dbh ) = @_;
					$dbh->do("set time zone 'Europe/Berlin'");
				}
			);

			return $pg;
		}
	);

	$self->helper(
		sendmail => sub {
			state $sendmail = Travelynx::Helper::Sendmail->new(
				config => ( $self->config->{mail} // {} ),
				log    => $self->log
			);
		}
	);

	$self->helper(
		stations => sub {
			my ($self) = @_;
			state $stations
			  = Travelynx::Model::Stations->new( pg => $self->pg );
		}
	);

	$self->helper(
		users => sub {
			my ($self) = @_;
			state $users = Travelynx::Model::Users->new( pg => $self->pg );
		}
	);

	$self->helper(
		dbdb => sub {
			my ($self) = @_;
			state $dbdb = Travelynx::Helper::DBDB->new(
				log        => $self->app->log,
				cache      => $self->app->cache_iris_main,
				root_url   => $self->base_url_for('/')->to_abs,
				user_agent => $self->ua,
				version    => $self->app->config->{version},
			);
		}
	);

	$self->helper(
		'now' => sub {
			return DateTime->now( time_zone => 'Europe/Berlin' );
		}
	);

	$self->helper(
		'numify_skipped_stations' => sub {
			my ( $self, $count ) = @_;

			if ( $count == 0 ) {
				return 'INTERNAL ERROR';
			}
			if ( $count == 1 ) {
				return
'Eine Station ohne Geokoordinaten wurde nicht berücksichtigt.';
			}
			return
"${count} Stationen ohne Geookordinaten wurden nicht berücksichtigt.";
		}
	);

	$self->helper(
		'load_icon' => sub {
			my ( $self, $load ) = @_;
			my $first  = $load->{FIRST}  // 0;
			my $second = $load->{SECOND} // 0;

			my @symbols
			  = (
				qw(help_outline person_outline people priority_high not_interested)
			  );

			return ( $symbols[$first], $symbols[$second] );
		}
	);

	$self->helper(
		'visibility_icon' => sub {
			my ( $self, $visibility ) = @_;
			if ( $visibility eq 'public' ) {
				return 'language';
			}
			if ( $visibility eq 'travelynx' ) {
				return 'lock_open';
			}
			if ( $visibility eq 'followers' ) {
				return 'group';
			}
			if ( $visibility eq 'unlisted' ) {
				return 'lock_outline';
			}
			if ( $visibility eq 'private' ) {
				return 'lock';
			}
			return 'help_outline';
		}
	);

	$self->helper(
		'checkin_p' => sub {
			my ( $self, %opt ) = @_;

			my $station  = $opt{station};
			my $train_id = $opt{train_id};
			my $uid      = $opt{uid} // $self->current_user->{id};
			my $db       = $opt{db}  // $self->pg->db;
			my $hafas;

			if ( $train_id =~ m{[|]} ) {
				$hafas = 1;
			}

			if ($hafas) {
				return Mojo::Promise->reject(
					'HAFAS checkins are not supported yet, sorry');
			}

			my $user = $self->get_user_status( $uid, $db );
			if ( $user->{checked_in} or $user->{cancelled} ) {
				return Mojo::Promise->reject('You are already checked in');
			}

			my $promise = Mojo::Promise->new;

			$self->iris->get_departures_p(
				station    => $station,
				lookbehind => 140,
				lookahead  => 40
			)->then(
				sub {
					my ($status) = @_;

					if ( $status->{errstr} ) {
						$promise->reject( $status->{errstr} );
						return;
					}

					my $eva   = $status->{station_eva};
					my $train = List::Util::first { $_->train_id eq $train_id }
					@{ $status->{results} };

					if ( not defined $train ) {
						$promise->reject("Train ${train_id} not found");
						return;
					}

					eval {
						$self->in_transit->add(
							uid           => $uid,
							db            => $db,
							departure_eva => $eva,
							train         => $train,
							route => [ $self->iris->route_diff($train) ],
						);
					};
					if ($@) {
						$self->app->log->error(
							"Checkin($uid): INSERT failed: $@");
						$promise->reject( 'INSERT failed: ' . $@ );
						return;
					}

					# mustn't be called during a transaction
					if ( not $opt{in_transaction} ) {
						$self->add_route_timestamps( $uid, $train, 1 );
						$self->run_hook( $uid, 'checkin' );
					}

					$promise->resolve($train);
					return;
				}
			)->catch(
				sub {
					my ( $err, $status ) = @_;
					$promise->reject( $status->{errstr} );
					return;
				}
			)->wait;

			return $promise;
		}
	);

	$self->helper(
		'undo' => sub {
			my ( $self, $journey_id, $uid ) = @_;
			$uid //= $self->current_user->{id};

			if ( $journey_id eq 'in_transit' ) {
				eval { $self->in_transit->delete( uid => $uid ); };
				if ($@) {
					$self->app->log->error("Undo($uid, $journey_id): $@");
					return "Undo($journey_id): $@";
				}
				$self->run_hook( $uid, 'undo' );
				return undef;
			}
			if ( $journey_id !~ m{ ^ \d+ $ }x ) {
				return 'Invalid Journey ID';
			}

			eval {
				my $db = $self->pg->db;
				my $tx = $db->begin;

				my $journey = $self->journeys->pop(
					uid        => $uid,
					db         => $db,
					journey_id => $journey_id
				);

				if ( $journey->{edited} ) {
					die(
"Cannot undo a journey which has already been edited. Please delete manually.\n"
					);
				}

				delete $journey->{edited};
				delete $journey->{id};

				# users may force checkouts at stations that are not part of
				# the train's scheduled (or real-time) route. re-adding those
				# to in-transit violates the assumption that each train has
				# a valid destination. Remove the target in this case.
				my $route = JSON->new->decode( $journey->{route} );
				my $found_checkout_id;
				for my $stop ( @{$route} ) {
					if ( $stop->[1] == $journey->{checkout_station_id} ) {
						$found_checkout_id = 1;
						last;
					}
				}
				if ( not $found_checkout_id ) {
					$journey->{checkout_station_id} = undef;
					$journey->{checkout_time}       = undef;
					$journey->{arr_platform}        = undef;
					$journey->{sched_arrival}       = undef;
					$journey->{real_arrival}        = undef;
				}

				$self->in_transit->add_from_journey(
					db      => $db,
					journey => $journey
				);

				my $cache_ts = DateTime->now( time_zone => 'Europe/Berlin' );
				if ( $journey->{real_departure}
					=~ m{ ^ (?<year> \d{4} ) - (?<month> \d{2} ) }x )
				{
					$cache_ts->set(
						year  => $+{year},
						month => $+{month}
					);
				}

				$self->journey_stats_cache->invalidate(
					ts  => $cache_ts,
					db  => $db,
					uid => $uid
				);

				$tx->commit;
			};
			if ($@) {
				$self->app->log->error("Undo($uid, $journey_id): $@");
				return "Undo($journey_id): $@";
			}
			$self->run_hook( $uid, 'undo' );
			return undef;
		}
	);

	$self->helper(
		'checkout_p' => sub {
			my ( $self, %opt ) = @_;

			my $station      = $opt{station};
			my $dep_eva      = $opt{dep_eva};
			my $arr_eva      = $opt{arr_eva};
			my $with_related = $opt{with_related} // 0;
			my $force        = $opt{force};
			my $uid          = $opt{uid} // $self->current_user->{id};
			my $db           = $opt{db}  // $self->pg->db;
			my $user         = $self->get_user_status( $uid, $db );
			my $train_id     = $user->{train_id};

			my $promise = Mojo::Promise->new;

			if ( not $station ) {
				$self->app->log->error("Checkout($uid): station is empty");
				return $promise->resolve( 1,
					'BUG: Checkout station is empty.' );
			}

			if ( not $user->{checked_in} and not $user->{cancelled} ) {
				return $promise->resolve( 0,
					'You are not checked into any train' );
			}

			if ( $dep_eva and $dep_eva != $user->{dep_eva} ) {
				return $promise->resolve( 0, 'race condition' );
			}
			if ( $arr_eva and $arr_eva != $user->{arr_eva} ) {
				return $promise->resolve( 0, 'race condition' );
			}

			my $now     = DateTime->now( time_zone => 'Europe/Berlin' );
			my $journey = $self->in_transit->get(
				uid       => $uid,
				with_data => 1
			);

			$self->iris->get_departures_p(
				station      => $station,
				lookbehind   => 120,
				lookahead    => 180,
				with_related => $with_related,
			)->then(
				sub {
					my ($status) = @_;

					my $new_checkout_station_id = $status->{station_eva};

					# Store the intended checkout station regardless of this operation's
					# success.
					# TODO for with_related == 1, the correct EVA may be different
					# and should be fetched from $train later on
					$self->in_transit->set_arrival_eva(
						uid         => $uid,
						db          => $db,
						arrival_eva => $new_checkout_station_id
					);

					# If in_transit already contains arrival data for another estimated
					# destination, we must invalidate it.
					if ( defined $journey->{checkout_station_id}
						and $journey->{checkout_station_id}
						!= $new_checkout_station_id )
					{
						$self->in_transit->unset_arrival_data(
							uid => $uid,
							db  => $db
						);
					}

					# Note that a train may pass the same station several times.
					# Notable example: S41 / S42 ("Ringbahn") both starts and
					# terminates at Berlin Südkreuz
					my $train = List::Util::first {
						$_->train_id eq $train_id
						  and $_->sched_arrival
						  and $_->sched_arrival->epoch
						  > $user->{sched_departure}->epoch
					}
					@{ $status->{results} };

					$train //= List::Util::first { $_->train_id eq $train_id }
					@{ $status->{results} };

					if ( not defined $train ) {

						# Arrival time via IRIS is unknown, so the train probably
						# has not arrived yet. Fall back to HAFAS.
						# TODO support cases where $station is EVA or DS100 code
						if (
							my $station_data
							= List::Util::first { $_->[0] eq $station }
							@{ $journey->{route} }
						  )
						{
							$station_data = $station_data->[2];
							if ( $station_data->{sched_arr} ) {
								my $sched_arr
								  = epoch_to_dt( $station_data->{sched_arr} );
								my $rt_arr
								  = epoch_to_dt( $station_data->{rt_arr} );
								if ( $rt_arr->epoch == 0 ) {
									$rt_arr = $sched_arr->clone;
									if (    $station_data->{arr_delay}
										and $station_data->{arr_delay}
										=~ m{^\d+$} )
									{
										$rt_arr->add( minutes =>
											  $station_data->{arr_delay} );
									}
								}
								$self->in_transit->set_arrival_times(
									uid           => $uid,
									db            => $db,
									sched_arrival => $sched_arr,
									rt_arrival    => $rt_arr
								);
							}
						}
						if ( not $force ) {

							# mustn't be called during a transaction
							if ( not $opt{in_transaction} ) {
								$self->run_hook( $uid, 'update' );
							}
							$promise->resolve( 1, undef );
							return;
						}
					}
					my $has_arrived = 0;

					eval {

						my $tx;
						if ( not $opt{in_transaction} ) {
							$tx = $db->begin;
						}

						if (    defined $train
							and not $train->arrival
							and not $force )
						{
							my $train_no = $train->train_no;
							die("Train ${train_no} has no arrival timestamp\n");
						}
						elsif ( defined $train and $train->arrival ) {
							$self->in_transit->set_arrival(
								uid   => $uid,
								db    => $db,
								train => $train,
								route => [ $self->iris->route_diff($train) ]
							);

							$has_arrived
							  = $train->arrival->epoch < $now->epoch ? 1 : 0;
							if ($has_arrived) {
								my @unknown_stations
								  = $self->stations->grep_unknown(
									$train->route );
								if (@unknown_stations) {
									$self->app->log->warn(
										sprintf(
'Route of %s %s (%s -> %s) contains unknown stations: %s',
											$train->type,
											$train->train_no,
											$train->origin,
											$train->destination,
											join( ', ', @unknown_stations )
										)
									);
								}
							}
						}

						$journey = $self->in_transit->get(
							uid => $uid,
							db  => $db
						);

						if ( $has_arrived or $force ) {
							$self->journeys->add_from_in_transit(
								db      => $db,
								journey => $journey
							);
							$self->in_transit->delete(
								uid => $uid,
								db  => $db
							);

							my $cache_ts = $now->clone;
							if ( $journey->{real_departure}
								=~ m{ ^ (?<year> \d{4} ) - (?<month> \d{2} ) }x
							  )
							{
								$cache_ts->set(
									year  => $+{year},
									month => $+{month}
								);
							}
							$self->journey_stats_cache->invalidate(
								ts  => $cache_ts,
								db  => $db,
								uid => $uid
							);
						}
						elsif ( defined $train
							and $train->arrival_is_cancelled )
						{

							# This branch is only taken if the deparure was not cancelled,
							# i.e., if the train was supposed to go here but got
							# redirected or cancelled on the way and not from the start on.
							# If the departure itself was cancelled, the user route is
							# cancelled_from action -> 'cancelled journey' panel on main page
							# -> cancelled_to action -> force checkout (causing the
							# previous branch to be taken due to $force)
							$journey->{cancelled} = 1;
							$self->journeys->add_from_in_transit(
								db      => $db,
								journey => $journey
							);
							$self->in_transit->set_cancelled_destination(
								uid                   => $uid,
								db                    => $db,
								cancelled_destination => $train->station,
							);
						}

						if ( not $opt{in_transaction} ) {
							$tx->commit;
						}
					};

					if ($@) {
						$self->app->log->error("Checkout($uid): $@");
						$promise->resolve( 1, 'Checkout error: ' . $@ );
						return;
					}

					if ( $has_arrived or $force ) {
						if ( not $opt{in_transaction} ) {
							$self->run_hook( $uid, 'checkout' );
						}
						$promise->resolve( 0, undef );
						return;
					}
					if ( not $opt{in_transaction} ) {
						$self->run_hook( $uid, 'update' );
						$self->add_route_timestamps( $uid, $train, 0, 1 );
					}
					$promise->resolve( 1, undef );
					return;

				}
			)->catch(
				sub {
					my ($err) = @_;
					$promise->resolve( 1, $err );
					return;
				}
			)->wait;

			return $promise;
		}
	);

	# This helper should only be called directly when also providing a user ID.
	# If you don't have one, use current_user() instead (get_user_data will
	# delegate to it anyways).
	$self->helper(
		'get_user_data' => sub {
			my ( $self, $uid ) = @_;

			$uid //= $self->current_user->{id};

			return $self->users->get( uid => $uid );
		}
	);

	$self->helper(
		'run_hook' => sub {
			my ( $self, $uid, $reason, $callback ) = @_;

			my $hook = $self->users->get_webhook( uid => $uid );

			if ( not $hook->{enabled} or not $hook->{url} =~ m{^ https?:// }x )
			{
				if ($callback) {
					&$callback();
				}
				return;
			}

			my $status    = $self->get_user_status_json_v1( uid => $uid );
			my $header    = {};
			my $hook_body = {
				reason => $reason,
				status => $status,
			};

			if ( $hook->{token} ) {
				$header->{Authorization} = "Bearer $hook->{token}";
				$header->{'User-Agent'}
				  = 'travelynx/' . $self->app->config->{version};
			}

			my $ua = $self->ua;
			if ($callback) {
				$ua->request_timeout(4);
			}
			else {
				$ua->request_timeout(10);
			}

			$ua->post_p( $hook->{url} => $header => json => $hook_body )->then(
				sub {
					my ($tx) = @_;
					if ( my $err = $tx->error ) {
						$self->users->update_webhook_status(
							uid     => $uid,
							url     => $hook->{url},
							success => 0,
							text    => "HTTP $err->{code} $err->{message}"
						);
					}
					else {
						$self->users->update_webhook_status(
							uid     => $uid,
							url     => $hook->{url},
							success => 1,
							text    => $tx->result->body
						);
					}
					if ($callback) {
						&$callback();
					}
					return;
				}
			)->catch(
				sub {
					my ($err) = @_;
					$self->users->update_webhook_status(
						uid     => $uid,
						url     => $hook->{url},
						success => 0,
						text    => $err
					);
					if ($callback) {
						&$callback();
					}
					return;
				}
			)->wait;
		}
	);

	$self->helper(
		'add_route_timestamps' => sub {
			my ( $self, $uid, $train, $is_departure, $update_polyline ) = @_;

			$uid //= $self->current_user->{id};

			my $db = $self->pg->db;

			# TODO "with_timestamps" is misleading, there are more differences between in_transit and in_transit_str
			# Here it's only needed because of dep_eva / arr_eva names
			my $in_transit = $self->in_transit->get(
				db              => $db,
				uid             => $uid,
				with_data       => 1,
				with_timestamps => 1
			);

			if ( not $in_transit ) {
				return;
			}

			my ($platform) = ( ( $train->platform // 0 ) =~ m{(\d+)} );

			my $route = $in_transit->{route};

			my $base
			  = 'https://reiseauskunft.bahn.de/bin/trainsearch.exe/dn?L=vs_json.vs_hap&start=yes&rt=1';
			my $date_yy   = $train->start->strftime('%d.%m.%y');
			my $date_yyyy = $train->start->strftime('%d.%m.%Y');
			my $train_no  = $train->type . ' ' . $train->train_no;

			$self->hafas->get_json_p(
				"${base}&date=${date_yy}&trainname=${train_no}")->then(
				sub {
					my ($trainsearch) = @_;

					# Fallback: Take first result
					my $result = $trainsearch->{suggestions}[0];

					# Try finding a result for the current date
					for
					  my $suggestion ( @{ $trainsearch->{suggestions} // [] } )
					{

						# Drunken API, sail with care. Both date formats are used interchangeably
						if (
							$suggestion->{depDate}
							and (  $suggestion->{depDate} eq $date_yy
								or $suggestion->{depDate} eq $date_yyyy )
						  )
						{
							# Train numbers are not unique, e.g. IC 149 refers both to the
							# InterCity service Amsterdam -> Berlin and to the InterCity service
							# Koebenhavns Lufthavn st -> Aarhus.  One workaround is making
							# requests with the stationFilter=80 parameter.  Checking the origin
							# station seems to be the more generic solution, so we do that
							# instead.
							if ( $suggestion->{dep} eq $train->origin ) {
								$result = $suggestion;
								last;
							}
						}
					}

					if ( not $result ) {
						$self->app->log->debug("trainlink not found");
						return Mojo::Promise->reject("trainlink not found");
					}

					# Calculate and store trip_id.
					# The trip_id's date part doesn't seem to matter -- so far,
					# HAFAS is happy as long as the date part starts with a number.
					# HAFAS-internal tripIDs use this format (withouth leading zero
					# for day of month < 10) though, so let's stick with it.
					my $date_map = $date_yyyy;
					$date_map =~ tr{.}{}d;
					my $trip_id = sprintf( '1|%d|%d|%d|%s',
						$result->{id},   $result->{cycle},
						$result->{pool}, $date_map );

					$self->in_transit->update_data(
						uid  => $uid,
						db   => $db,
						data => { trip_id => $trip_id }
					);

					return $self->hafas->get_route_timestamps_p(
						train         => $train,
						trip_id       => $trip_id,
						with_polyline => (
							$update_polyline
							  or not $in_transit->{polyline}
						) ? 1 : 0,
					);
				}
			)->then(
				sub {
					my ( $route_data, $journey, $polyline ) = @_;

					for my $station ( @{$route} ) {
						if ( $station->[0]
							=~ m{^Betriebsstelle nicht bekannt (\d+)$} )
						{
							my $eva = $1;
							if ( $route_data->{$eva} ) {
								$station->[0] = $route_data->{$eva}{name};
								$station->[1] = $route_data->{$eva}{eva};
							}
						}
						if ( my $sd = $route_data->{ $station->[0] } ) {
							$station->[1] = $sd->{eva};
							if ( $station->[2]{isAdditional} ) {
								$sd->{isAdditional} = 1;
							}
							if ( $station->[2]{isCancelled} ) {
								$sd->{isCancelled} = 1;
							}

							# keep rt_dep / rt_arr if they are no longer present
							my %old;
							for my $k (qw(rt_arr rt_dep arr_delay dep_delay)) {
								$old{$k} = $station->[2]{$k};
							}
							$station->[2] = $sd;
							if ( not $station->[2]{rt_arr} ) {
								$station->[2]{rt_arr}    = $old{rt_arr};
								$station->[2]{arr_delay} = $old{arr_delay};
							}
							if ( not $station->[2]{rt_dep} ) {
								$station->[2]{rt_dep}    = $old{rt_dep};
								$station->[2]{dep_delay} = $old{dep_delay};
							}
						}
					}

					my @messages;
					for my $m ( $journey->messages ) {
						if ( not $m->code ) {
							push(
								@messages,
								{
									header => $m->short,
									lead   => $m->text,
								}
							);
						}
					}

					$self->in_transit->set_route_data(
						uid            => $uid,
						db             => $db,
						route          => $route,
						delay_messages => [
							map { [ $_->[0]->epoch, $_->[1] ] }
							  $train->delay_messages
						],
						qos_messages => [
							map { [ $_->[0]->epoch, $_->[1] ] }
							  $train->qos_messages
						],
						him_messages => \@messages,
					);

					if ($polyline) {
						my $coords   = $polyline->{coords};
						my $from_eva = $polyline->{from_eva};
						my $to_eva   = $polyline->{to_eva};

						my $polyline_str = JSON->new->encode($coords);

						my $pl_res = $db->select(
							'polylines',
							['id'],
							{
								origin_eva      => $from_eva,
								destination_eva => $to_eva,
								polyline        => $polyline_str
							},
							{ limit => 1 }
						);

						my $polyline_id;
						if ( my $h = $pl_res->hash ) {
							$polyline_id = $h->{id};
						}
						else {
							eval {
								$polyline_id = $db->insert(
									'polylines',
									{
										origin_eva      => $from_eva,
										destination_eva => $to_eva,
										polyline        => $polyline_str
									},
									{ returning => 'id' }
								)->hash->{id};
							};
							if ($@) {
								$self->app->log->warn(
									"add_route_timestamps: insert polyline: $@"
								);
							}
						}
						if (
							$polyline_id
							and ( not $in_transit->{polyline_id}
								or $polyline_id != $in_transit->{polyline_id} )
						  )
						{
							$self->in_transit->set_polyline_id(
								uid         => $uid,
								db          => $db,
								polyline_id => $polyline_id
							);
						}
					}

					return;
				}
			)->catch(
				sub {
					my ($err) = @_;
					$self->app->log->debug("add_route_timestamps: $err");
					return;
				}
			)->wait;

			if ( $train->sched_departure ) {
				$self->dbdb->has_wagonorder_p( $train->sched_departure,
					$train->train_no )->then(
					sub {
						my ($api) = @_;
						return $self->dbdb->get_wagonorder_p( $api,
							$train->sched_departure, $train->train_no );
					}
				)->then(
					sub {
						my ($wagonorder) = @_;

						my $data      = {};
						my $user_data = {};

						if ( $is_departure and not exists $wagonorder->{error} )
						{
							$data->{wagonorder_dep}   = $wagonorder;
							$user_data->{wagongroups} = [];
							for my $group (
								@{
									$wagonorder->{data}{istformation}
									  {allFahrzeuggruppe} // []
								}
							  )
							{
								my @wagons;
								for
								  my $wagon ( @{ $group->{allFahrzeug} // [] } )
								{
									push(
										@wagons,
										{
											id     => $wagon->{fahrzeugnummer},
											number =>
											  $wagon->{wagenordnungsnummer},
											type => $wagon->{fahrzeugtyp},
										}
									);
								}
								push(
									@{ $user_data->{wagongroups} },
									{
										name =>
										  $group->{fahrzeuggruppebezeichnung},
										from =>
										  $group->{startbetriebsstellename},
										to => $group->{zielbetriebsstellename},
										no => $group->{verkehrlichezugnummer},
										wagons => [@wagons],
									}
								);
								if (    $group->{fahrzeuggruppebezeichnung}
									and $group->{fahrzeuggruppebezeichnung} eq
									'ICE0304' )
								{
									$data->{wagonorder_pride} = 1;
								}
							}
							$self->in_transit->update_data(
								uid  => $uid,
								db   => $db,
								data => $data
							);
							$self->in_transit->update_user_data(
								uid       => $uid,
								db        => $db,
								user_data => $user_data
							);
						}
						elsif ( not $is_departure
							and not exists $wagonorder->{error} )
						{
							$data->{wagonorder_arr} = $wagonorder;
							$self->in_transit->update_data(
								uid  => $uid,
								db   => $db,
								data => $data
							);
						}
						return;
					}
				)->catch(
					sub {
						# no wagonorder? no problem.
						return;
					}
				)->wait;
			}

			if ($is_departure) {
				$self->dbdb->get_stationinfo_p( $in_transit->{dep_eva} )->then(
					sub {
						my ($station_info) = @_;
						my $data = { stationinfo_dep => $station_info };

						$self->in_transit->update_data(
							uid  => $uid,
							db   => $db,
							data => $data
						);
						return;
					}
				)->catch(
					sub {
						# no stationinfo? no problem.
						return;
					}
				)->wait;
			}

			if ( $in_transit->{arr_eva} and not $is_departure ) {
				$self->dbdb->get_stationinfo_p( $in_transit->{arr_eva} )->then(
					sub {
						my ($station_info) = @_;
						my $data = { stationinfo_arr => $station_info };

						$self->in_transit->update_data(
							uid  => $uid,
							db   => $db,
							data => $data
						);
						return;
					}
				)->catch(
					sub {
						# no stationinfo? no problem.
						return;
					}
				)->wait;
			}
		}
	);

	$self->helper(
		'resolve_sb_template' => sub {
			my ( $self, $template, %opt ) = @_;
			my $ret  = $template;
			my $name = $opt{name} =~ s{/}{%2F}gr;
			$ret =~ s{[{]eva[}]}{$opt{eva}}g;
			$ret =~ s{[{]name[}]}{$name}g;
			$ret =~ s{[{]tt[}]}{$opt{tt}}g;
			$ret =~ s{[{]tn[}]}{$opt{tn}}g;
			$ret =~ s{[{]id[}]}{$opt{id}}g;
			return $ret;
		}
	);

	$self->helper(
		'stationinfo_to_direction' => sub {
			my ( $self, $platform_info, $wagonorder, $prev_stop, $next_stop )
			  = @_;
			if ( $platform_info->{kopfgleis} ) {
				if ($next_stop) {
					return $platform_info->{direction} eq 'r' ? 'l' : 'r';
				}
				return $platform_info->{direction};
			}
			elsif ( $prev_stop
				and exists $platform_info->{direction_from}{$prev_stop} )
			{
				return $platform_info->{direction_from}{$prev_stop};
			}
			elsif ( $next_stop
				and exists $platform_info->{direction_from}{$next_stop} )
			{
				return $platform_info->{direction_from}{$next_stop} eq 'r'
				  ? 'l'
				  : 'r';
			}
			elsif ($wagonorder) {
				my $wr;
				eval {
					$wr
					  = Travel::Status::DE::DBWagenreihung->new(
						from_json => $wagonorder );
				};
				if (    $wr
					and $wr->sections
					and defined $wr->direction )
				{
					my $section_0 = ( $wr->sections )[0];
					my $direction = $wr->direction;
					if (    $section_0->name eq 'A'
						and $direction == 0 )
					{
						return $platform_info->{direction};
					}
					elsif ( $section_0->name ne 'A'
						and $direction == 100 )
					{
						return $platform_info->{direction};
					}
					elsif ( $platform_info->{direction} ) {
						return $platform_info->{direction} eq 'r'
						  ? 'l'
						  : 'r';
					}
					return;
				}
			}
		}
	);

	$self->helper(
		'journey_to_ajax_route' => sub {
			my ( $self, $journey ) = @_;

			my @route;

			for my $station ( @{ $journey->{route_after} } ) {
				my $station_desc = $station->[0];
				if ( $station->[2]{sched_arr} and $station->[2]{rt_arr} ) {
					$station_desc .= $station->[2]{sched_arr}->strftime(';%s');
					$station_desc .= $station->[2]{rt_arr}->strftime(';%s');
					if ( $station->[2]{sched_dep} and $station->[2]{rt_dep} ) {
						$station_desc
						  .= $station->[2]{sched_dep}->strftime(';%s');
						$station_desc .= $station->[2]{rt_dep}->strftime(';%s');
					}
					else {
						$station_desc .= ';0;0';
					}
				}
				else {
					$station_desc .= ';0;0;0;0';
				}
				push( @route, $station_desc );
			}

			return join( '|', @route );
		}
	);

	$self->helper(
		'get_user_status' => sub {
			my ( $self, $uid, $db ) = @_;

			$uid //= $self->current_user->{id};
			$db  //= $self->pg->db;

			my $now   = DateTime->now( time_zone => 'Europe/Berlin' );
			my $epoch = $now->epoch;

			my $in_transit = $self->in_transit->get(
				uid             => $uid,
				db              => $db,
				with_data       => 1,
				with_timestamps => 1,
				with_visibility => 1,
				postprocess     => 1,
			);

			if ($in_transit) {
				my $ret = $in_transit;

				my $traewelling = $self->traewelling->get(
					uid => $uid,
					db  => $db
				);
				if ( $traewelling->{latest_run}
					>= epoch_to_dt( $in_transit->{checkin_ts} ) )
				{
					$ret->{traewelling} = $traewelling;
					if ( @{ $traewelling->{data}{log} // [] }
						and ( my $log_entry = $traewelling->{data}{log}[0] ) )
					{
						if ( $log_entry->[2] ) {
							$ret->{traewelling_status} = $log_entry->[2];
							$ret->{traewelling_url}
							  = 'https://traewelling.de/status/'
							  . $log_entry->[2];
						}
						$ret->{traewelling_log_latest} = $log_entry->[1];
					}
				}

				my $stop_after_dep
				  = scalar @{ $ret->{route_after} }
				  ? $ret->{route_after}[0][0]
				  : undef;
				my $stop_before_dest;
				for my $i ( 1 .. $#{ $ret->{route_after} } ) {
					if (    $ret->{arr_name}
						and $ret->{route_after}[$i][0] eq $ret->{arr_name} )
					{
						$stop_before_dest = $ret->{route_after}[ $i - 1 ][0];
						last;
					}
				}

				my ($dep_platform_number)
				  = ( ( $ret->{dep_platform} // 0 ) =~ m{(\d+)} );
				if ( $dep_platform_number
					and
					exists $ret->{data}{stationinfo_dep}{$dep_platform_number} )
				{
					$ret->{dep_direction} = $self->stationinfo_to_direction(
						$ret->{data}{stationinfo_dep}{$dep_platform_number},
						$ret->{data}{wagonorder_dep},
						undef, $stop_after_dep
					);
				}

				my ($arr_platform_number)
				  = ( ( $ret->{arr_platform} // 0 ) =~ m{(\d+)} );
				if ( $arr_platform_number
					and
					exists $ret->{data}{stationinfo_arr}{$arr_platform_number} )
				{
					$ret->{arr_direction} = $self->stationinfo_to_direction(
						$ret->{data}{stationinfo_arr}{$arr_platform_number},
						$ret->{data}{wagonorder_arr},
						$stop_before_dest,
						undef
					);
				}

				if (    $ret->{departure_countdown} > 0
					and $in_transit->{data}{wagonorder_dep} )
				{
					my $wr;
					eval {
						$wr
						  = Travel::Status::DE::DBWagenreihung->new(
							from_json => $in_transit->{data}{wagonorder_dep} );
					};
					if (    $wr
						and $wr->wagons
						and defined $wr->direction )
					{
						$ret->{wagonorder} = $wr;
					}
				}

				return $ret;
			}

			my ( $latest, $latest_cancellation ) = $self->journeys->get_latest(
				uid => $uid,
				db  => $db,
			);

			if ( $latest_cancellation and $latest_cancellation->{cancelled} ) {
				if (
					my $station = $self->stations->get_by_eva(
						$latest_cancellation->{dep_eva}
					)
				  )
				{
					$latest_cancellation->{dep_ds100} = $station->{ds100};
					$latest_cancellation->{dep_name}  = $station->{name};
				}
				if (
					my $station = $self->stations->get_by_eva(
						$latest_cancellation->{arr_eva}
					)
				  )
				{
					$latest_cancellation->{arr_ds100} = $station->{ds100};
					$latest_cancellation->{arr_name}  = $station->{name};
				}
			}
			else {
				$latest_cancellation = undef;
			}

			if ($latest) {
				my $ts          = $latest->{checkout_ts};
				my $action_time = epoch_to_dt($ts);
				if ( my $station
					= $self->stations->get_by_eva( $latest->{dep_eva} ) )
				{
					$latest->{dep_ds100} = $station->{ds100};
					$latest->{dep_name}  = $station->{name};
				}
				if ( my $station
					= $self->stations->get_by_eva( $latest->{arr_eva} ) )
				{
					$latest->{arr_ds100} = $station->{ds100};
					$latest->{arr_name}  = $station->{name};
				}
				return {
					checked_in      => 0,
					cancelled       => 0,
					cancellation    => $latest_cancellation,
					journey_id      => $latest->{journey_id},
					timestamp       => $action_time,
					timestamp_delta => $now->epoch - $action_time->epoch,
					train_type      => $latest->{train_type},
					train_line      => $latest->{train_line},
					train_no        => $latest->{train_no},
					train_id        => $latest->{train_id},
					sched_departure => epoch_to_dt( $latest->{sched_dep_ts} ),
					real_departure  => epoch_to_dt( $latest->{real_dep_ts} ),
					dep_ds100       => $latest->{dep_ds100},
					dep_eva         => $latest->{dep_eva},
					dep_name        => $latest->{dep_name},
					dep_lat         => $latest->{dep_lat},
					dep_lon         => $latest->{dep_lon},
					dep_platform    => $latest->{dep_platform},
					sched_arrival   => epoch_to_dt( $latest->{sched_arr_ts} ),
					real_arrival    => epoch_to_dt( $latest->{real_arr_ts} ),
					arr_ds100       => $latest->{arr_ds100},
					arr_eva         => $latest->{arr_eva},
					arr_name        => $latest->{arr_name},
					arr_lat         => $latest->{arr_lat},
					arr_lon         => $latest->{arr_lon},
					arr_platform    => $latest->{arr_platform},
					comment         => $latest->{user_data}{comment},
					visibility      => $latest->{visibility},
					visibility_str  => $latest->{visibility_str},
					effective_visibility     => $latest->{effective_visibility},
					effective_visibility_str =>
					  $latest->{effective_visibility_str},
				};
			}

			return {
				checked_in      => 0,
				cancelled       => 0,
				cancellation    => $latest_cancellation,
				no_journeys_yet => 1,
				timestamp       => epoch_to_dt(0),
				timestamp_delta => $now->epoch,
			};
		}
	);

	$self->helper(
		'get_user_status_json_v1' => sub {
			my ( $self, %opt ) = @_;
			my $uid     = $opt{uid};
			my $privacy = $opt{privacy}
			  // $self->users->get_privacy_by( uid => $uid );
			my $status = $opt{status} // $self->get_user_status($uid);

			my $ret = {
				deprecated => \0,
				checkedIn  => (
					     $status->{checked_in}
					  or $status->{cancelled}
				) ? \1 : \0,
				comment     => $status->{comment},
				fromStation => {
					ds100         => $status->{dep_ds100},
					name          => $status->{dep_name},
					uic           => $status->{dep_eva},
					longitude     => $status->{dep_lon},
					latitude      => $status->{dep_lat},
					scheduledTime => $status->{sched_departure}
					? $status->{sched_departure}->epoch
					: undef,
					realTime => $status->{real_departure}
					? $status->{real_departure}->epoch
					: undef,
				},
				toStation => {
					ds100         => $status->{arr_ds100},
					name          => $status->{arr_name},
					uic           => $status->{arr_eva},
					longitude     => $status->{arr_lon},
					latitude      => $status->{arr_lat},
					scheduledTime => $status->{sched_arrival}
					? $status->{sched_arrival}->epoch
					: undef,
					realTime => $status->{real_arrival}
					? $status->{real_arrival}->epoch
					: undef,
				},
				train => {
					type => $status->{train_type},
					line => $status->{train_line},
					no   => $status->{train_no},
					id   => $status->{train_id},
				},
				intermediateStops => [],
				visibility        => {
					level => $status->{effective_visibility},
					desc  => $status->{effective_visibility_str},
				}
			};

			if ( $opt{public} ) {
				if ( not $privacy->{comments_visible} ) {
					delete $ret->{comment};
				}
			}
			else {
				$ret->{actionTime}
				  = $status->{timestamp}
				  ? $status->{timestamp}->epoch
				  : undef;
			}

			for my $stop ( @{ $status->{route_after} // [] } ) {
				if ( $status->{arr_name} and $stop->[0] eq $status->{arr_name} )
				{
					last;
				}
				push(
					@{ $ret->{intermediateStops} },
					{
						name             => $stop->[0],
						scheduledArrival => $stop->[2]{sched_arr}
						? $stop->[2]{sched_arr}->epoch
						: undef,
						realArrival => $stop->[2]{rt_arr}
						? $stop->[2]{rt_arr}->epoch
						: undef,
						scheduledDeparture => $stop->[2]{sched_dep}
						? $stop->[2]{sched_dep}->epoch
						: undef,
						realDeparture => $stop->[2]{rt_dep}
						? $stop->[2]{rt_dep}->epoch
						: undef,
					}
				);
			}

			return $ret;
		}
	);

	$self->helper(
		'traewelling_to_travelynx_p' => sub {
			my ( $self, %opt ) = @_;
			my $traewelling = $opt{traewelling};
			my $user_data   = $opt{user_data};
			my $uid         = $user_data->{user_id};

			my $promise = Mojo::Promise->new;

			if ( not $traewelling->{checkin}
				or $self->now->epoch - $traewelling->{checkin}->epoch > 900 )
			{
				$self->log->debug("... not checked in");
				return $promise->resolve;
			}
			if (    $traewelling->{status_id}
				and $user_data->{data}{latest_pull_status_id}
				and $traewelling->{status_id}
				== $user_data->{data}{latest_pull_status_id} )
			{
				$self->log->debug("... already handled");
				return $promise->resolve;
			}
			$self->log->debug(
"... checked in : $traewelling->{dep_name} $traewelling->{dep_eva} -> $traewelling->{arr_name} $traewelling->{arr_eva}"
			);
			my $user_status = $self->get_user_status($uid);
			if ( $user_status->{checked_in} ) {
				$self->log->debug(
					"... also checked in via travelynx. aborting.");
				return $promise->resolve;
			}

			if ( $traewelling->{category}
				!~ m{^ (?: national .* | regional .* | suburban ) $ }x )
			{
				$self->log->debug(
					"... status is not a train, but $traewelling->{category}");
				$self->traewelling->log(
					uid     => $uid,
					message =>
"$traewelling->{line} nach $traewelling->{arr_name} ist keine Zugfahrt (HAFAS-Kategorie '$traewelling->{category}')",
					status_id => $traewelling->{status_id},
				);
				$self->traewelling->set_latest_pull_status_id(
					uid       => $uid,
					status_id => $traewelling->{status_id}
				);
				return $promise->resolve;
			}

			$self->iris->get_departures_p(
				station    => $traewelling->{dep_eva},
				lookbehind => 60,
				lookahead  => 40
			)->then(
				sub {
					my ($dep) = @_;
					my ( $train_ref, $train_id );

					if ( $dep->{errstr} ) {
						$self->traewelling->log(
							uid     => $uid,
							message =>
"Konnte $traewelling->{line} nach $traewelling->{arr_name} nicht übernehmen: $dep->{errstr}",
							status_id => $traewelling->{status_id},
							is_error  => 1,
						);
						$promise->resolve;
						return;
					}

					for my $train ( @{ $dep->{results} } ) {
						if ( $train->line ne $traewelling->{line} ) {
							next;
						}
						if ( not $train->sched_departure
							or $train->sched_departure->epoch
							!= $traewelling->{dep_dt}->epoch )
						{
							next;
						}
						if (
							not
							List::Util::first { $_ eq $traewelling->{arr_name} }
							$train->route_post
						  )
						{
							next;
						}
						$train_id  = $train->train_id;
						$train_ref = $train;
						last;
					}

					if ( not $train_id ) {
						$self->log->debug(
							"... train $traewelling->{line} not found");
						$self->traewelling->log(
							uid     => $uid,
							message =>
"Konnte $traewelling->{line} nach $traewelling->{arr_name} nicht übernehmen: Zug nicht gefunden",
							status_id => $traewelling->{status_id},
							is_error  => 1
						);
						return $promise->resolve;
					}

					$self->log->debug("... found train: $train_id");

					my $db = $self->pg->db;
					my $tx = $db->begin;

					$self->checkin_p(
						station        => $traewelling->{dep_eva},
						train_id       => $train_id,
						uid            => $uid,
						in_transaction => 1,
						db             => $db
					)->then(
						sub {
							$self->log->debug("... handled origin");
							return $self->checkout_p(
								station        => $traewelling->{arr_eva},
								train_id       => 0,
								uid            => $uid,
								in_transaction => 1,
								db             => $db
							);
						}
					)->then(
						sub {
							my ( undef, $err ) = @_;
							if ($err) {
								$self->log->debug("... error: $err");
								return Mojo::Promise->reject($err);
							}
							$self->log->debug("... handled destination");
							if ( $traewelling->{message} ) {
								$self->in_transit->update_user_data(
									uid       => $uid,
									db        => $db,
									user_data =>
									  { comment => $traewelling->{message} }
								);
							}
							$self->traewelling->log(
								uid     => $uid,
								db      => $db,
								message =>
"Eingecheckt in $traewelling->{line} nach $traewelling->{arr_name}",
								status_id => $traewelling->{status_id},
							);
							$self->traewelling->set_latest_pull_status_id(
								uid       => $uid,
								status_id => $traewelling->{status_id},
								db        => $db
							);

							$tx->commit;
							$promise->resolve;
							return;
						}
					)->catch(
						sub {
							my ($err) = @_;
							$self->log->debug("... error: $err");
							$self->traewelling->log(
								uid     => $uid,
								message =>
"Konnte $traewelling->{line} nach $traewelling->{arr_name} nicht übernehmen: $err",
								status_id => $traewelling->{status_id},
								is_error  => 1
							);
							$promise->resolve;
							return;
						}
					)->wait;
				}
			)->catch(
				sub {
					my ( $err, $dep ) = @_;
					$self->traewelling->log(
						uid     => $uid,
						message =>
"Konnte $traewelling->{line} nach $traewelling->{arr_name} nicht übernehmen: $dep->{errstr}",
						status_id => $traewelling->{status_id},
						is_error  => 1,
					);
					$promise->resolve;
					return;
				}
			)->wait;

			return $promise;
		}
	);

	$self->helper(
		'journeys_to_map_data' => sub {
			my ( $self, %opt ) = @_;

			my @journeys       = @{ $opt{journeys} // [] };
			my $route_type     = $opt{route_type} // 'polybee';
			my $include_manual = $opt{include_manual} ? 1 : 0;

			my $location = $self->app->coordinates_by_station;

			my $with_polyline = $route_type eq 'beeline' ? 0 : 1;

			if ( not @journeys ) {
				return {
					skipped_journeys    => [],
					station_coordinates => [],
					polyline_groups     => [],
				};
			}

			my $json = JSON->new->utf8;

			my $first_departure = $journeys[-1]->{rt_departure};
			my $last_departure  = $journeys[0]->{rt_departure};

			my @stations = List::Util::uniq map { $_->{to_name} } @journeys;
			push( @stations,
				List::Util::uniq map { $_->{from_name} } @journeys );
			@stations = List::Util::uniq @stations;
			my @station_coordinates = map { [ $location->{$_}, $_ ] }
			  grep { exists $location->{$_} } @stations;

			my @station_pairs;
			my @polylines;
			my %seen;

			my @skipped_journeys;
			my @polyline_journeys = grep { $_->{polyline} } @journeys;
			my @beeline_journeys  = grep { not $_->{polyline} } @journeys;

			if ( $route_type eq 'polyline' ) {
				@beeline_journeys = ();
			}
			elsif ( $route_type eq 'beeline' ) {
				push( @beeline_journeys, @polyline_journeys );
				@polyline_journeys = ();
			}

			for my $journey (@polyline_journeys) {
				my @polyline = @{ $journey->{polyline} };
				my $from_eva = $journey->{from_eva};
				my $to_eva   = $journey->{to_eva};

				my $from_index
				  = first_index { $_->[2] and $_->[2] == $from_eva } @polyline;
				my $to_index
				  = first_index { $_->[2] and $_->[2] == $to_eva } @polyline;

				if (   $from_index == -1
					or $to_index == -1 )
				{
					# Fall back to route
					delete $journey->{polyline};
					next;
				}

				my $key
				  = $from_eva . '!'
				  . $to_eva . '!'
				  . ( $to_index - $from_index );

				if ( $seen{$key} ) {
					next;
				}

				$seen{$key} = 1;

				# direction does not matter at the moment
				$key
				  = $to_eva . '!'
				  . $from_eva . '!'
				  . ( $to_index - $from_index );
				$seen{$key} = 1;

				@polyline = @polyline[ $from_index .. $to_index ];
				my @polyline_coords;
				for my $coord (@polyline) {
					push( @polyline_coords, [ $coord->[1], $coord->[0] ] );
				}
				push( @polylines, [@polyline_coords] );
			}

			for my $journey (@beeline_journeys) {

				my @route = map { $_->[0] } @{ $journey->{route} };

				my $from_index
				  = first_index { $_ eq $journey->{from_name} } @route;
				my $to_index = first_index { $_ eq $journey->{to_name} } @route;

				if ( $from_index == -1 ) {
					my $rename = $self->app->renamed_station;
					$from_index = first_index {
						( $rename->{$_} // $_ ) eq $journey->{from_name}
					}
					@route;
				}
				if ( $to_index == -1 ) {
					my $rename = $self->app->renamed_station;
					$to_index = first_index {
						( $rename->{$_} // $_ ) eq $journey->{to_name}
					}
					@route;
				}

				if (   $from_index == -1
					or $to_index == -1 )
				{
					push( @skipped_journeys,
						[ $journey, 'Start/Ziel nicht in Route gefunden' ] );
					next;
				}

				# Manual journey entries are only included if one of the following
				# conditions is satisfied:
				# * their route has more than two elements (-> probably more than just
				#   start and stop station), or
				# * $include_manual is true (-> user wants to see incomplete routes)
				# This avoids messing up the map in case an A -> B connection has been
				# tracked both with a regular checkin (-> detailed route shown on map)
				# and entered manually (-> beeline also shown on map, typically
				# significantly differs from detailed route) -- unless the user
				# sets include_manual, of course.
				if (    $journey->{edited} & 0x0010
					and @route <= 2
					and not $include_manual )
				{
					push( @skipped_journeys,
						[ $journey, 'Manueller Eintrag ohne Unterwegshalte' ] );
					next;
				}

				@route = @route[ $from_index .. $to_index ];

				my $key = join( '|', @route );

				if ( $seen{$key} ) {
					next;
				}

				$seen{$key} = 1;

				# direction does not matter at the moment
				$seen{ join( '|', reverse @route ) } = 1;

				my $prev_station = shift @route;
				for my $station (@route) {
					push( @station_pairs, [ $prev_station, $station ] );
					$prev_station = $station;
				}
			}

			@station_pairs = uniq_by { $_->[0] . '|' . $_->[1] } @station_pairs;
			@station_pairs = grep {
				      exists $location->{ $_->[0] }
				  and exists $location->{ $_->[1] }
			} @station_pairs;
			@station_pairs
			  = map { [ $location->{ $_->[0] }, $location->{ $_->[1] } ] }
			  @station_pairs;

			my $ret = {
				skipped_journeys    => \@skipped_journeys,
				station_coordinates => \@station_coordinates,
				polyline_groups     => [
					{
						polylines => $json->encode( \@station_pairs ),
						color     => '#673ab7',
						opacity   => $with_polyline ? 0.4 : 0.6,
					},
					{
						polylines => $json->encode( \@polylines ),
						color     => '#673ab7',
						opacity   => 0.8,
					}
				],
			};

			if (@station_coordinates) {
				my @lats    = map { $_->[0][0] } @station_coordinates;
				my @lons    = map { $_->[0][1] } @station_coordinates;
				my $min_lat = List::Util::min @lats;
				my $max_lat = List::Util::max @lats;
				my $min_lon = List::Util::min @lons;
				my $max_lon = List::Util::max @lons;
				$ret->{bounds}
				  = [ [ $min_lat, $min_lon ], [ $max_lat, $max_lon ] ];
			}

			return $ret;
		}
	);

	$self->helper(
		'navbar_class' => sub {
			my ( $self, $path ) = @_;

			if ( $self->req->url eq $self->url_for($path) ) {
				return 'active';
			}
			return q{};
		}
	);

	my $r = $self->routes;

	$r->get('/')->to('traveling#homepage');
	$r->get('/about')->to('static#about');
	$r->get('/api')->to('api#documentation');
	$r->get('/changelog')->to('static#changelog');
	$r->get('/impressum')->to('static#imprint');
	$r->get('/imprint')->to('static#imprint');
	$r->get('/legend')->to('static#legend');
	$r->get('/offline.html')->to('static#offline');
	$r->get('/api/v1/:user_action/:token')->to('api#get_v1');
	$r->get('/login')->to('account#login_form');
	$r->get('/recover')->to('account#request_password_reset');
	$r->get('/recover/:id/:token')->to('account#recover_password');
	$r->get('/reg/:id/:token')->to('account#verify');
	$r->get('/status/:name')->to('profile#user_status');
	$r->get('/status/:name/:ts')->to('profile#user_status');
	$r->get('/ajax/status/#name')->to('profile#status_card');
	$r->get('/ajax/status/:name/:ts')->to('profile#status_card');
	$r->get('/p/:name')->to('profile#profile');
	$r->get( '/p/:name/j/:id' => 'public_journey' )
	  ->to('profile#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');
	$r->post('/geolocation')->to('traveling#geolocation');
	$r->post('/list_departures')->to('traveling#redirect_to_station');
	$r->post('/login')->to('account#do_login');
	$r->post('/recover')->to('account#request_password_reset');

	if ( not $self->config->{registration}{disabled} ) {
		$r->get('/register')->to('account#registration_form');
		$r->post('/register')->to('account#register');
	}

	my $authed_r = $r->under(
		sub {
			my ($self) = @_;
			if ( $self->is_user_authenticated ) {
				return 1;
			}
			$self->render(
				'login',
				redirect_to => $self->req->url,
				from        => 'auth_required'
			);
			return undef;
		}
	);

	$authed_r->get('/account')->to('account#account');
	$authed_r->get('/account/privacy')->to('account#privacy');
	$authed_r->get('/account/social')->to('account#social');
	$authed_r->get('/account/social/:kind')->to('account#social_list');
	$authed_r->get('/account/profile')->to('account#profile');
	$authed_r->get('/account/hooks')->to('account#webhook');
	$authed_r->get('/account/traewelling')->to('traewelling#settings');
	$authed_r->get('/account/insight')->to('account#insight');
	$authed_r->get('/account/services')->to('account#services');
	$authed_r->get('/ajax/status_card.html')->to('traveling#status_card');
	$authed_r->get('/cancelled')->to('traveling#cancelled');
	$authed_r->get('/fgr')->to('passengerrights#list_candidates');
	$authed_r->get('/account/password')->to('account#password_form');
	$authed_r->get('/account/mail')->to('account#change_mail');
	$authed_r->get('/account/name')->to('account#change_name');
	$authed_r->get('/export.json')->to('account#json_export');
	$authed_r->get('/history.json')->to('traveling#json_history');
	$authed_r->get('/history.csv')->to('traveling#csv_history');
	$authed_r->get('/history')->to('traveling#history');
	$authed_r->get('/history/commute')->to('traveling#commute');
	$authed_r->get('/history/map')->to('traveling#map_history');
	$authed_r->get('/history/:year')->to('traveling#yearly_history');
	$authed_r->get('/history/:year/review')->to('traveling#year_in_review');
	$authed_r->get('/history/:year/:month')->to('traveling#monthly_history');
	$authed_r->get('/journey/add')->to('traveling#add_journey_form');
	$authed_r->get('/journey/comment')->to('traveling#comment_form');
	$authed_r->get('/journey/visibility')->to('traveling#visibility_form');
	$authed_r->get('/journey/:id')->to('traveling#journey_details');
	$authed_r->get('/s/*station')->to('traveling#station');
	$authed_r->get('/confirm_mail/:token')->to('account#confirm_mail');
	$authed_r->post('/account/privacy')->to('account#privacy');
	$authed_r->post('/account/social')->to('account#social');
	$authed_r->post('/account/profile')->to('account#profile');
	$authed_r->post('/account/hooks')->to('account#webhook');
	$authed_r->post('/account/traewelling')->to('traewelling#settings');
	$authed_r->post('/account/insight')->to('account#insight');
	$authed_r->post('/account/services')->to('account#services');
	$authed_r->post('/journey/add')->to('traveling#add_journey_form');
	$authed_r->post('/journey/comment')->to('traveling#comment_form');
	$authed_r->post('/journey/visibility')->to('traveling#visibility_form');
	$authed_r->post('/journey/edit')->to('traveling#edit_journey');
	$authed_r->post('/journey/passenger_rights/*filename')
	  ->to('passengerrights#generate');
	$authed_r->post('/account/password')->to('account#change_password');
	$authed_r->post('/account/mail')->to('account#change_mail');
	$authed_r->post('/account/name')->to('account#change_name');
	$authed_r->post('/social-action')->to('account#social_action');
	$authed_r->post('/delete')->to('account#delete');
	$authed_r->post('/logout')->to('account#do_logout');
	$authed_r->post('/set_token')->to('api#set_token');
	$authed_r->get('/timeline/in-transit')->to('profile#checked_in');

}

1;
