Move most journey code to newly introduced Journey model

5 files changed, 868 insertions, 720 deletions

diff --git a/lib/Travelynx.pm b/lib/Travelynx.pm
index d0b268e..232cb46 100755
--- a/lib/Travelynx.pm
+++ b/lib/Travelynx.pm
@@ -10,16 +10,16 @@ use DateTime;
 use DateTime::Format::Strptime;
 use Encode qw(decode encode);
 use File::Slurp qw(read_file);
-use Geo::Distance;
 use JSON;
 use List::Util;
 use List::UtilsBy qw(uniq_by);
-use List::MoreUtils qw(after_incl before_incl first_index);
+use List::MoreUtils qw(first_index);
 use Travel::Status::DE::DBWagenreihung;
 use Travel::Status::DE::IRIS::Stations;
 use Travelynx::Helper::HAFAS;
 use Travelynx::Helper::IRIS;
 use Travelynx::Helper::Sendmail;
+use Travelynx::Model::Journeys;
 use Travelynx::Model::Users;
 use XML::LibXML;
 
@@ -290,6 +290,18 @@ sub startup {
 	);
 
 	$self->helper(
+		journeys => sub {
+			my ($self) = @_;
+			state $journeys = Travelynx::Model::Journeys->new(
+				log             => $self->app->log,
+				pg              => $self->pg,
+				renamed_station => $self->app->renamed_station,
+				station_by_eva  => $self->app->station_by_eva,
+			);
+		}
+	);
+
+	$self->helper(
 		pg => sub {
 			my ($self) = @_;
 			my $config = $self->app->config;
@@ -359,126 +371,6 @@ sub startup {
 		}
 	);
 
-	# Returns (journey id, error)
-	# Must be called during a transaction.
-	# Must perform a rollback on error.
-	$self->helper(
-		'add_journey' => sub {
-			my ( $self, %opt ) = @_;
-
-			my $db          = $opt{db};
-			my $uid         = $opt{uid} // $self->current_user->{id};
-			my $now         = DateTime->now( time_zone => 'Europe/Berlin' );
-			my $dep_station = get_station( $opt{dep_station} );
-			my $arr_station = get_station( $opt{arr_station} );
-
-			if ( not $dep_station ) {
-				return ( undef, 'Unbekannter Startbahnhof' );
-			}
-			if ( not $arr_station ) {
-				return ( undef, 'Unbekannter Zielbahnhof' );
-			}
-
-			my $daily_journey_count = $db->select(
-				'journeys_str',
-				'count(*) as count',
-				{
-					user_id     => $uid,
-					real_dep_ts => {
-						-between => [
-							$opt{rt_departure}->clone->subtract( days => 1 )
-							  ->epoch,
-							$opt{rt_departure}->epoch
-						],
-					},
-				}
-			)->hash->{count};
-
-			if ( $daily_journey_count >= 100 ) {
-				return ( undef,
-"In den 24 Stunden vor der angegebenen Abfahrtszeit wurden ${daily_journey_count} weitere Fahrten angetreten. Das kann nicht stimmen."
-				);
-			}
-
-			my @route = ( [ $dep_station->[1], {}, undef ] );
-
-			if ( $opt{route} ) {
-				my @unknown_stations;
-				for my $station ( @{ $opt{route} } ) {
-					my $station_info = get_station($station);
-					if ($station_info) {
-						push( @route, [ $station_info->[1], {}, undef ] );
-					}
-					else {
-						push( @route, [ $station, {}, undef ] );
-						push( @unknown_stations, $station );
-					}
-				}
-
-				if ( not $opt{lax} ) {
-					if ( @unknown_stations == 1 ) {
-						return ( undef,
-							"Unbekannter Unterwegshalt: $unknown_stations[0]" );
-					}
-					elsif (@unknown_stations) {
-						return ( undef,
-							'Unbekannte Unterwegshalte: '
-							  . join( ', ', @unknown_stations ) );
-					}
-				}
-			}
-
-			push( @route, [ $arr_station->[1], {}, undef ] );
-
-			if ( $route[0][0] eq $route[1][0] ) {
-				shift(@route);
-			}
-
-			if ( $route[-2][0] eq $route[-1][0] ) {
-				pop(@route);
-			}
-
-			my $entry = {
-				user_id             => $uid,
-				train_type          => $opt{train_type},
-				train_line          => $opt{train_line},
-				train_no            => $opt{train_no},
-				train_id            => 'manual',
-				checkin_station_id  => $dep_station->[2],
-				checkin_time        => $now,
-				sched_departure     => $opt{sched_departure},
-				real_departure      => $opt{rt_departure},
-				checkout_station_id => $arr_station->[2],
-				sched_arrival       => $opt{sched_arrival},
-				real_arrival        => $opt{rt_arrival},
-				checkout_time       => $now,
-				edited              => 0x3fff,
-				cancelled           => $opt{cancelled} ? 1 : 0,
-				route               => JSON->new->encode( \@route ),
-			};
-
-			if ( $opt{comment} ) {
-				$entry->{user_data}
-				  = JSON->new->encode( { comment => $opt{comment} } );
-			}
-
-			my $journey_id = undef;
-			eval {
-				$journey_id
-				  = $db->insert( 'journeys', $entry, { returning => 'id' } )
-				  ->hash->{id};
-				$self->invalidate_stats_cache( $opt{rt_departure}, $db, $uid );
-			};
-
-			if ($@) {
-				$self->app->log->error("add_journey($uid): $@");
-				return ( undef, 'add_journey failed: ' . $@ );
-			}
-
-			return ( $journey_id, undef );
-		}
-	);
-
 	$self->helper(
 		'checkin' => sub {
 			my ( $self, $station, $train_id, $uid ) = @_;
@@ -620,7 +512,11 @@ sub startup {
 					);
 				}
 
-				$self->invalidate_stats_cache( $cache_ts, $db, $uid );
+				$self->journeys->invalidate_stats_cache(
+					ts  => $cache_ts,
+					db  => $db,
+					uid => $uid
+				);
 
 				$tx->commit;
 			};
@@ -633,36 +529,6 @@ sub startup {
 		}
 	);
 
-	# Statistics are partitioned by real_departure, which must be provided
-	# when calling this function e.g. after journey deletion or editing.
-	# If a joureny's real_departure has been edited, this function must be
-	# called twice: once with the old and once with the new value.
-	$self->helper(
-		'invalidate_stats_cache' => sub {
-			my ( $self, $ts, $db, $uid ) = @_;
-
-			$uid //= $self->current_user->{id};
-			$db  //= $self->pg->db;
-
-			$self->pg->db->delete(
-				'journey_stats',
-				{
-					user_id => $uid,
-					year    => $ts->year,
-					month   => $ts->month,
-				}
-			);
-			$self->pg->db->delete(
-				'journey_stats',
-				{
-					user_id => $uid,
-					year    => $ts->year,
-					month   => 0,
-				}
-			);
-		}
-	);
-
 	$self->helper(
 		'checkout' => sub {
 			my ( $self, $station, $force, $uid ) = @_;
@@ -856,7 +722,11 @@ sub startup {
 							month => $+{month}
 						);
 					}
-					$self->invalidate_stats_cache( $cache_ts, $db, $uid );
+					$self->journeys->invalidate_stats_cache(
+						ts  => $cache_ts,
+						db  => $db,
+						uid => $uid
+					);
 				}
 				elsif ( defined $train and $train->arrival_is_cancelled ) {
 
@@ -929,208 +799,6 @@ sub startup {
 		}
 	);
 
-	$self->helper(
-		'update_journey_part' => sub {
-			my ( $self, $db, $journey_id, $key, $value ) = @_;
-			my $rows;
-
-			my $journey = $self->get_journey(
-				db            => $db,
-				journey_id    => $journey_id,
-				with_datetime => 1,
-			);
-
-			eval {
-				if ( $key eq 'from_name' ) {
-					my $from_station = get_station( $value, 1 );
-					if ( not $from_station ) {
-						die("Unbekannter Startbahnhof\n");
-					}
-					$rows = $db->update(
-						'journeys',
-						{
-							checkin_station_id => $from_station->[2],
-							edited             => $journey->{edited} | 0x0004,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'to_name' ) {
-					my $to_station = get_station( $value, 1 );
-					if ( not $to_station ) {
-						die("Unbekannter Zielbahnhof\n");
-					}
-					$rows = $db->update(
-						'journeys',
-						{
-							checkout_station_id => $to_station->[2],
-							edited              => $journey->{edited} | 0x0400,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'sched_departure' ) {
-					$rows = $db->update(
-						'journeys',
-						{
-							sched_departure => $value,
-							edited          => $journey->{edited} | 0x0001,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'rt_departure' ) {
-					$rows = $db->update(
-						'journeys',
-						{
-							real_departure => $value,
-							edited         => $journey->{edited} | 0x0002,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-
-                 # stats are partitioned by rt_departure -> both the cache for
-                 # the old value (see bottom of this function) and the new value
-                 # (here) must be invalidated.
-					$self->invalidate_stats_cache( $value, $db );
-				}
-				elsif ( $key eq 'sched_arrival' ) {
-					$rows = $db->update(
-						'journeys',
-						{
-							sched_arrival => $value,
-							edited        => $journey->{edited} | 0x0100,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'rt_arrival' ) {
-					$rows = $db->update(
-						'journeys',
-						{
-							real_arrival => $value,
-							edited       => $journey->{edited} | 0x0200,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'route' ) {
-					my @new_route = map { [ $_, {}, undef ] } @{$value};
-					$rows = $db->update(
-						'journeys',
-						{
-							route  => JSON->new->encode( \@new_route ),
-							edited => $journey->{edited} | 0x0010,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'cancelled' ) {
-					$rows = $db->update(
-						'journeys',
-						{
-							cancelled => $value,
-							edited    => $journey->{edited} | 0x0020,
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				elsif ( $key eq 'comment' ) {
-					$journey->{user_data}{comment} = $value;
-					$rows = $db->update(
-						'journeys',
-						{
-							user_data =>
-							  JSON->new->encode( $journey->{user_data} ),
-						},
-						{
-							id => $journey_id,
-						}
-					)->rows;
-				}
-				else {
-					die("Invalid key $key\n");
-				}
-			};
-
-			if ($@) {
-				$self->app->log->error(
-					"update_journey_part($journey_id, $key): $@");
-				return "update_journey_part($key): $@";
-			}
-			if ( $rows == 1 ) {
-				$self->invalidate_stats_cache( $journey->{rt_departure}, $db );
-				return undef;
-			}
-			return 'UPDATE failed: did not match any journey part';
-		}
-	);
-
-	$self->helper(
-		'journey_sanity_check' => sub {
-			my ( $self, $journey, $lax ) = @_;
-
-			if ( defined $journey->{sched_duration}
-				and $journey->{sched_duration} <= 0 )
-			{
-				return
-'Die geplante Dauer dieser Zugfahrt ist ≤ 0. Teleportation und Zeitreisen werden aktuell nicht unterstützt.';
-			}
-			if ( defined $journey->{rt_duration}
-				and $journey->{rt_duration} <= 0 )
-			{
-				return
-'Die Dauer dieser Zugfahrt ist ≤ 0. Teleportation und Zeitreisen werden aktuell nicht unterstützt.';
-			}
-			if (    $journey->{sched_duration}
-				and $journey->{sched_duration} > 60 * 60 * 24 )
-			{
-				return 'Die Zugfahrt ist länger als 24 Stunden.';
-			}
-			if (    $journey->{rt_duration}
-				and $journey->{rt_duration} > 60 * 60 * 24 )
-			{
-				return 'Die Zugfahrt ist länger als 24 Stunden.';
-			}
-			if ( $journey->{kmh_route} > 500 or $journey->{kmh_beeline} > 500 )
-			{
-				return 'Zugfahrten mit über 500 km/h? Schön wär\'s.';
-			}
-			if ( $journey->{route} and @{ $journey->{route} } > 99 ) {
-				my $stop_count = @{ $journey->{route} };
-				return
-"Die Zugfahrt hat $stop_count Unterwegshalte. Also ich weiß ja nicht so recht.";
-			}
-			if ( $journey->{edited} & 0x0010 and not $lax ) {
-				my @unknown_stations
-				  = $self->grep_unknown_stations( map { $_->[0] }
-					  @{ $journey->{route} } );
-				if (@unknown_stations) {
-					return 'Unbekannte Station(en): '
-					  . join( ', ', @unknown_stations );
-				}
-			}
-
-			return undef;
-		}
-	);
-
 	# 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).
@@ -1292,55 +960,6 @@ sub startup {
 	);
 
 	$self->helper(
-		'delete_journey' => sub {
-			my ( $self, $journey_id, $checkin_epoch, $checkout_epoch ) = @_;
-			my $uid = $self->current_user->{id};
-
-			my @journeys = $self->get_user_travels(
-				uid        => $uid,
-				journey_id => $journey_id
-			);
-			if ( @journeys == 0 ) {
-				return 'Journey not found';
-			}
-			my $journey = $journeys[0];
-
-			# Double-check (comparing both ID and action epoch) to make sure we
-			# are really deleting the right journey and the user isn't just
-			# playing around with POST requests.
-			if (   $journey->{id} != $journey_id
-				or $journey->{checkin_ts} != $checkin_epoch
-				or $journey->{checkout_ts} != $checkout_epoch )
-			{
-				return 'Invalid journey data';
-			}
-
-			my $rows;
-			eval {
-				$rows = $self->pg->db->delete(
-					'journeys',
-					{
-						user_id => $uid,
-						id      => $journey_id,
-					}
-				)->rows;
-			};
-
-			if ($@) {
-				$self->app->log->error("Delete($uid, $journey_id): $@");
-				return 'DELETE failed: ' . $@;
-			}
-
-			if ( $rows == 1 ) {
-				$self->invalidate_stats_cache(
-					epoch_to_dt( $journey->{rt_dep_ts} ) );
-				return undef;
-			}
-			return sprintf( 'Deleted %d rows, expected 1', $rows );
-		}
-	);
-
-	$self->helper(
 		'get_journey_stats' => sub {
 			my ( $self, %opt ) = @_;
 
@@ -1401,7 +1020,7 @@ sub startup {
 				$interval_end = $interval_start->clone->add( years => 1 );
 			}
 
-			my @journeys = $self->get_user_travels(
+			my @journeys = $self->journeys->get(
 				uid           => $uid,
 				cancelled     => $opt{cancelled} ? 1 : 0,
 				verbose       => 1,
@@ -2002,31 +1621,6 @@ sub startup {
 	);
 
 	$self->helper(
-		'get_oldest_journey_ts' => sub {
-			my ($self) = @_;
-
-			my $res_h = $self->pg->db->select(
-				'journeys_str',
-				['sched_dep_ts'],
-				{
-					user_id => $self->current_user->{id},
-				},
-				{
-					limit    => 1,
-					order_by => {
-						-asc => 'real_dep_ts',
-					},
-				}
-			)->hash;
-
-			if ($res_h) {
-				return epoch_to_dt( $res_h->{sched_dep_ts} );
-			}
-			return undef;
-		}
-	);
-
-	$self->helper(
 		'get_latest_dest_id' => sub {
 			my ( $self, %opt ) = @_;
 
@@ -2254,164 +1848,6 @@ sub startup {
 	);
 
 	$self->helper(
-		'get_user_travels' => sub {
-			my ( $self, %opt ) = @_;
-
-			my $uid = $opt{uid} || $self->current_user->{id};
-
-			# If get_user_travels is called from inside a transaction, db
-			# specifies the database handle performing the transaction.
-			# Otherwise, we grab a fresh one.
-			my $db = $opt{db} // $self->pg->db;
-
-			my @select
-			  = (
-				qw(journey_id train_type train_line train_no checkin_ts sched_dep_ts real_dep_ts dep_eva checkout_ts sched_arr_ts real_arr_ts arr_eva cancelled edited route messages user_data)
-			  );
-			my %where = (
-				user_id   => $uid,
-				cancelled => 0
-			);
-			my %order = (
-				order_by => {
-					-desc => 'real_dep_ts',
-				}
-			);
-
-			if ( $opt{cancelled} ) {
-				$where{cancelled} = 1;
-			}
-
-			if ( $opt{limit} ) {
-				$order{limit} = $opt{limit};
-			}
-
-			if ( $opt{journey_id} ) {
-				$where{journey_id} = $opt{journey_id};
-				delete $where{cancelled};
-			}
-			elsif ( $opt{after} and $opt{before} ) {
-				$where{real_dep_ts} = {
-					-between => [ $opt{after}->epoch, $opt{before}->epoch, ] };
-			}
-
-			if ( $opt{with_polyline} ) {
-				push( @select, 'polyline' );
-			}
-
-			my @travels;
-
-			my $res = $db->select( 'journeys_str', \@select, \%where, \%order );
-
-			for my $entry ( $res->expand->hashes->each ) {
-
-				my $ref = {
-					id           => $entry->{journey_id},
-					type         => $entry->{train_type},
-					line         => $entry->{train_line},
-					no           => $entry->{train_no},
-					from_eva     => $entry->{dep_eva},
-					checkin_ts   => $entry->{checkin_ts},
-					sched_dep_ts => $entry->{sched_dep_ts},
-					rt_dep_ts    => $entry->{real_dep_ts},
-					to_eva       => $entry->{arr_eva},
-					checkout_ts  => $entry->{checkout_ts},
-					sched_arr_ts => $entry->{sched_arr_ts},
-					rt_arr_ts    => $entry->{real_arr_ts},
-					messages     => $entry->{messages},
-					route        => $entry->{route},
-					edited       => $entry->{edited},
-					user_data    => $entry->{user_data},
-				};
-
-				if ( $opt{with_polyline} ) {
-					$ref->{polyline} = $entry->{polyline};
-				}
-
-				if ( my $station
-					= $self->app->station_by_eva->{ $ref->{from_eva} } )
-				{
-					$ref->{from_ds100} = $station->[0];
-					$ref->{from_name}  = $station->[1];
-				}
-				if ( my $station
-					= $self->app->station_by_eva->{ $ref->{to_eva} } )
-				{
-					$ref->{to_ds100} = $station->[0];
-					$ref->{to_name}  = $station->[1];
-				}
-
-				if ( $opt{with_datetime} ) {
-					$ref->{checkin} = epoch_to_dt( $ref->{checkin_ts} );
-					$ref->{sched_departure}
-					  = epoch_to_dt( $ref->{sched_dep_ts} );
-					$ref->{rt_departure}  = epoch_to_dt( $ref->{rt_dep_ts} );
-					$ref->{checkout}      = epoch_to_dt( $ref->{checkout_ts} );
-					$ref->{sched_arrival} = epoch_to_dt( $ref->{sched_arr_ts} );
-					$ref->{rt_arrival}    = epoch_to_dt( $ref->{rt_arr_ts} );
-				}
-
-				if ( $opt{verbose} ) {
-					my $rename = $self->app->renamed_station;
-					for my $stop ( @{ $ref->{route} } ) {
-						if ( $rename->{ $stop->[0] } ) {
-							$stop->[0] = $rename->{ $stop->[0] };
-						}
-					}
-					$ref->{cancelled} = $entry->{cancelled};
-					my @parsed_messages;
-					for my $message ( @{ $ref->{messages} // [] } ) {
-						my ( $ts, $msg ) = @{$message};
-						push( @parsed_messages, [ epoch_to_dt($ts), $msg ] );
-					}
-					$ref->{messages} = [ reverse @parsed_messages ];
-					$ref->{sched_duration}
-					  = defined $ref->{sched_arr_ts}
-					  ? $ref->{sched_arr_ts} - $ref->{sched_dep_ts}
-					  : undef;
-					$ref->{rt_duration}
-					  = defined $ref->{rt_arr_ts}
-					  ? $ref->{rt_arr_ts} - $ref->{rt_dep_ts}
-					  : undef;
-					my ( $km_polyline, $km_route, $km_beeline, $skip )
-					  = $self->get_travel_distance($ref);
-					$ref->{km_route}     = $km_polyline || $km_route;
-					$ref->{skip_route}   = $km_polyline ? 0 : $skip;
-					$ref->{km_beeline}   = $km_beeline;
-					$ref->{skip_beeline} = $skip;
-					my $kmh_divisor
-					  = ( $ref->{rt_duration} // $ref->{sched_duration}
-						  // 999999 ) / 3600;
-					$ref->{kmh_route}
-					  = $kmh_divisor ? $ref->{km_route} / $kmh_divisor : -1;
-					$ref->{kmh_beeline}
-					  = $kmh_divisor
-					  ? $ref->{km_beeline} / $kmh_divisor
-					  : -1;
-				}
-
-				push( @travels, $ref );
-			}
-
-			return @travels;
-		}
-	);
-
-	$self->helper(
-		'get_journey' => sub {
-			my ( $self, %opt ) = @_;
-
-			$opt{cancelled} = 'any';
-			my @journeys = $self->get_user_travels(%opt);
-			if ( @journeys == 0 ) {
-				return undef;
-			}
-
-			return $journeys[0];
-		}
-	);
-
-	$self->helper(
 		'stationinfo_to_direction' => sub {
 			my ( $self, $platform_info, $wagonorder, $prev_stop, $next_stop )
 			  = @_;
@@ -3146,95 +2582,6 @@ sub startup {
 	);
 
 	$self->helper(
-		'get_travel_distance' => sub {
-			my ( $self, $journey ) = @_;
-
-			my $from         = $journey->{from_name};
-			my $from_eva     = $journey->{from_eva};
-			my $to           = $journey->{to_name};
-			my $to_eva       = $journey->{to_eva};
-			my $route_ref    = $journey->{route};
-			my $polyline_ref = $journey->{polyline};
-
-			my $distance_polyline     = 0;
-			my $distance_intermediate = 0;
-			my $distance_beeline      = 0;
-			my $skipped               = 0;
-			my $geo                   = Geo::Distance->new();
-			my @stations              = map { $_->[0] } @{$route_ref};
-			my @route                 = after_incl { $_ eq $from } @stations;
-			@route = before_incl { $_ eq $to } @route;
-
-			if ( @route < 2 ) {
-
-				# I AM ERROR
-				return ( 0, 0, 0 );
-			}
-
-			my @polyline = after_incl { $_->[2] and $_->[2] == $from_eva }
-			@{ $polyline_ref // [] };
-			@polyline
-			  = before_incl { $_->[2] and $_->[2] == $to_eva } @polyline;
-
-			my $prev_station = shift @polyline;
-			for my $station (@polyline) {
-
-				#lonlatlonlat
-				$distance_polyline
-				  += $geo->distance( 'kilometer', $prev_station->[0],
-					$prev_station->[1], $station->[0], $station->[1] );
-				$prev_station = $station;
-			}
-
-			$prev_station = get_station( shift @route );
-			if ( not $prev_station ) {
-				return ( $distance_polyline, 0, 0 );
-			}
-
-           # Geo-coordinates for stations outside Germany are not available
-           # at the moment. When calculating distance with intermediate stops,
-           # these are simply left out (as if they were not part of the route).
-           # For beeline distance calculation, we use the route's first and last
-           # station with known geo-coordinates.
-			my $from_station_beeline;
-			my $to_station_beeline;
-
-			# $#{$station} >= 4    iff    $station has geocoordinates
-			for my $station_name (@route) {
-				if ( my $station = get_station($station_name) ) {
-					if ( not $from_station_beeline and $#{$prev_station} >= 4 )
-					{
-						$from_station_beeline = $prev_station;
-					}
-					if ( $#{$station} >= 4 ) {
-						$to_station_beeline = $station;
-					}
-					if ( $#{$prev_station} >= 4 and $#{$station} >= 4 ) {
-						$distance_intermediate
-						  += $geo->distance( 'kilometer', $prev_station->[3],
-							$prev_station->[4], $station->[3], $station->[4] );
-					}
-					else {
-						$skipped++;
-					}
-					$prev_station = $station;
-				}
-			}
-
-			if ( $from_station_beeline and $to_station_beeline ) {
-				$distance_beeline = $geo->distance(
-					'kilometer',                $from_station_beeline->[3],
-					$from_station_beeline->[4], $to_station_beeline->[3],
-					$to_station_beeline->[4]
-				);
-			}
-
-			return ( $distance_polyline, $distance_intermediate,
-				$distance_beeline, $skipped );
-		}
-	);
-
-	$self->helper(
 		'compute_journey_stats' => sub {
 			my ( $self, @journeys ) = @_;
 			my $km_route         = 0;
diff --git a/lib/Travelynx/Controller/Api.pm b/lib/Travelynx/Controller/Api.pm
index 8af57be..6ffd310 100755
--- a/lib/Travelynx/Controller/Api.pm
+++ b/lib/Travelynx/Controller/Api.pm
@@ -492,18 +492,18 @@ sub import_v1 {
 	my $tx = $db->begin;
 
 	$opt{db} = $db;
-	my ( $journey_id, $error ) = $self->add_journey(%opt);
+	my ( $journey_id, $error ) = $self->journeys->add(%opt);
 	my $journey;
 
 	if ( not $error ) {
-		$journey = $self->get_journey(
+		$journey = $self->journeys->get_single(
 			uid        => $uid,
 			db         => $db,
 			journey_id => $journey_id,
 			verbose    => 1
 		);
 		$error
-		  = $self->journey_sanity_check( $journey, $payload->{lax} ? 1 : 0 );
+		  = $self->journeys->sanity_check( $journey, $payload->{lax} ? 1 : 0 );
 	}
 
 	if ($error) {
@@ -526,7 +526,11 @@ sub import_v1 {
 		);
 	}
 	else {
-		$self->invalidate_stats_cache( $opt{rt_departure}, $db, $uid );
+		$self->journeys->invalidate_stats_cache(
+			ts  => $opt{rt_departure},
+			db  => $db,
+			uid => $uid
+		);
 		$tx->commit;
 		$self->render(
 			json => {
diff --git a/lib/Travelynx/Controller/Passengerrights.pm b/lib/Travelynx/Controller/Passengerrights.pm
index 7d9a00b..dc73f37 100644
--- a/lib/Travelynx/Controller/Passengerrights.pm
+++ b/lib/Travelynx/Controller/Passengerrights.pm
@@ -50,7 +50,8 @@ sub mark_if_missed_connection {
 sub mark_substitute_connection {
 	my ( $self, $journey ) = @_;
 
-	my @substitute_candidates = reverse $self->get_user_travels(
+	my @substitute_candidates = reverse $self->journeys->get(
+		uid    => $self->current_user->{id},
 		after  => $journey->{sched_departure}->clone->subtract( hours => 1 ),
 		before => $journey->{sched_departure}->clone->add( hours => 12 ),
 		with_datetime => 1,
@@ -87,7 +88,8 @@ sub list_candidates {
 	my $now         = DateTime->now( time_zone => 'Europe/Berlin' );
 	my $range_start = $now->clone->subtract( months => 6 );
 
-	my @journeys = $self->get_user_travels(
+	my @journeys = $self->journeys->get(
+		uid           => $self->current_user->{id},
 		after         => $range_start,
 		before        => $now,
 		with_datetime => 1,
@@ -112,7 +114,8 @@ sub list_candidates {
 
 	@journeys = grep { $_->{delay} >= 60 or $_->{connection_missed} } @journeys;
 
-	my @cancelled = $self->get_user_travels(
+	my @cancelled = $self->journeys->get(
+		uid           => $self->current_user->{id},
 		after         => $range_start,
 		before        => $now,
 		cancelled     => 1,
@@ -163,7 +166,7 @@ sub generate {
 		return;
 	}
 
-	my $journey = $self->get_journey(
+	my $journey = $self->journeys->get_single(
 		uid           => $uid,
 		journey_id    => $journey_id,
 		verbose       => 1,
@@ -187,7 +190,7 @@ sub generate {
 		$self->mark_substitute_connection($journey);
 	}
 	elsif ( $journey->{delay} < 120 ) {
-		my @connections = $self->get_user_travels(
+		my @connections = $self->journey->get(
 			uid           => $uid,
 			after         => $journey->{rt_arrival},
 			before        => $journey->{rt_arrival}->clone->add( hours => 2 ),
diff --git a/lib/Travelynx/Controller/Traveling.pm b/lib/Travelynx/Controller/Traveling.pm
index e33009f..59bad45 100755
--- a/lib/Travelynx/Controller/Traveling.pm
+++ b/lib/Travelynx/Controller/Traveling.pm
@@ -60,14 +60,14 @@ sub user_status {
 	  )
 	{
 		for my $candidate (
-			$self->get_user_travels(
+			$self->journeys->get(
 				uid   => $user->{id},
 				limit => 10,
 			)
 		  )
 		{
 			if ( $candidate->{sched_dep_ts} eq $ts ) {
-				$journey = $self->get_journey(
+				$journey = $self->journeys->get_single(
 					uid           => $user->{id},
 					journey_id    => $candidate->{id},
 					verbose       => 1,
@@ -389,8 +389,12 @@ sub log_action {
 		}
 	}
 	elsif ( $params->{action} eq 'delete' ) {
-		my $error = $self->delete_journey( $params->{id}, $params->{checkin},
-			$params->{checkout} );
+		my $error = $self->journeys->delete(
+			uid      => $self->current_user->{id},
+			id       => $params->{id},
+			checkin  => $params->{checkin},
+			checkout => $params->{checkout}
+		);
 		if ($error) {
 			$self->render(
 				json => {
@@ -474,7 +478,8 @@ sub redirect_to_station {
 
 sub cancelled {
 	my ($self) = @_;
-	my @journeys = $self->get_user_travels(
+	my @journeys = $self->journeys->get(
+		uid           => $self->current_user->{id},
 		cancelled     => 1,
 		with_datetime => 1
 	);
@@ -523,7 +528,8 @@ sub commute {
 	);
 	my $interval_end = $interval_start->clone->add( years => 1 );
 
-	my @journeys = $self->get_user_travels(
+	my @journeys = $self->journeys->get(
+		uid           => $self->current_user->{id},
 		after         => $interval_start,
 		before        => $interval_end,
 		with_datetime => 1,
@@ -616,7 +622,10 @@ sub map_history {
 	my $route_type    = $self->param('route_type');
 	my $with_polyline = $route_type eq 'beeline' ? 0 : 1;
 
-	my @journeys = $self->get_user_travels( with_polyline => $with_polyline );
+	my @journeys = $self->journeys->get(
+		uid           => $self->current_user->{id},
+		with_polyline => $with_polyline
+	);
 
 	if ( not @journeys ) {
 		$self->render(
@@ -647,7 +656,8 @@ sub map_history {
 sub json_history {
 	my ($self) = @_;
 
-	$self->render( json => [ $self->get_user_travels ] );
+	$self->render(
+		json => [ $self->journeys->get( uid => $self->current_user->{id} ) ] );
 }
 
 sub csv_history {
@@ -669,7 +679,13 @@ sub csv_history {
 	);
 	$buf .= $csv->string;
 
-	for my $journey ( $self->get_user_travels( with_datetime => 1 ) ) {
+	for my $journey (
+		$self->journeys->get(
+			uid           => $self->current_user->{id},
+			with_datetime => 1
+		)
+	  )
+	{
 		if (
 			$csv->combine(
 				$journey->{type},
@@ -708,7 +724,10 @@ sub yearly_history {
 	# -> Limit time range to avoid accidental DoS.
 	if ( not( $year =~ m{ ^ [0-9]{4} $ }x and $year > 1990 and $year < 2100 ) )
 	{
-		@journeys = $self->get_user_travels( with_datetime => 1 );
+		@journeys = $self->journeys->get(
+			uid           => $self->current_user->{id},
+			with_datetime => 1
+		);
 	}
 	else {
 		my $interval_start = DateTime->new(
@@ -721,7 +740,8 @@ sub yearly_history {
 			second    => 0,
 		);
 		my $interval_end = $interval_start->clone->add( years => 1 );
-		@journeys = $self->get_user_travels(
+		@journeys = $self->journeys->get(
+			uid           => $self->current_user->{id},
 			after         => $interval_start,
 			before        => $interval_end,
 			with_datetime => 1
@@ -766,7 +786,10 @@ sub monthly_history {
 			and $month < 13 )
 	  )
 	{
-		@journeys = $self->get_user_travels( with_datetime => 1 );
+		@journeys = $self->journeys->get(
+			uid           => $self->current_user->{id},
+			with_datetime => 1
+		);
 	}
 	else {
 		my $interval_start = DateTime->new(
@@ -779,7 +802,8 @@ sub monthly_history {
 			second    => 0,
 		);
 		my $interval_end = $interval_start->clone->add( months => 1 );
-		@journeys = $self->get_user_travels(
+		@journeys = $self->journeys->get(
+			uid           => $self->current_user->{id},
 			after         => $interval_start,
 			before        => $interval_end,
 			with_datetime => 1
@@ -827,7 +851,7 @@ sub journey_details {
 		return;
 	}
 
-	my $journey = $self->get_journey(
+	my $journey = $self->journeys->get_single(
 		uid           => $uid,
 		journey_id    => $journey_id,
 		verbose       => 1,
@@ -919,7 +943,7 @@ sub edit_journey {
 		return;
 	}
 
-	my $journey = $self->get_journey(
+	my $journey = $self->journeys->get_single(
 		uid           => $uid,
 		journey_id    => $journey_id,
 		verbose       => 1,
@@ -952,8 +976,12 @@ sub edit_journey {
 		{
 			my $datetime = $parser->parse_datetime( $self->param($key) );
 			if ( $datetime and $datetime->epoch ne $journey->{$key}->epoch ) {
-				$error = $self->update_journey_part( $db, $journey->{id},
-					$key, $datetime );
+				$error = $self->journeys->update(
+					uid  => $uid,
+					db   => $db,
+					id   => $journey->{id},
+					$key => $datetime
+				);
 				if ($error) {
 					last;
 				}
@@ -963,8 +991,12 @@ sub edit_journey {
 			if ( defined $self->param($key)
 				and $self->param($key) ne $journey->{$key} )
 			{
-				$error = $self->update_journey_part( $db, $journey->{id}, $key,
-					$self->param($key) );
+				$error = $self->journeys->update(
+					uid  => $uid,
+					db   => $db,
+					id   => $journey->{id},
+					$key => $self->param($key)
+				);
 				if ($error) {
 					last;
 				}
@@ -977,8 +1009,12 @@ sub edit_journey {
 					or $journey->{user_data}{$key} ne $self->param($key) )
 			  )
 			{
-				$error = $self->update_journey_part( $db, $journey->{id}, $key,
-					$self->param($key) );
+				$error = $self->journeys->update(
+					uid  => $uid,
+					db   => $db,
+					id   => $journey->{id},
+					$key => $self->param($key)
+				);
 				if ($error) {
 					last;
 				}
@@ -989,30 +1025,36 @@ sub edit_journey {
 			my @route_new = split( qr{\r?\n\r?}, $self->param('route') );
 			@route_new = grep { $_ ne '' } @route_new;
 			if ( join( '|', @route_old ) ne join( '|', @route_new ) ) {
-				$error
-				  = $self->update_journey_part( $db, $journey->{id}, 'route',
-					[@route_new] );
+				$error = $self->journeys->update(
+					uid   => $uid,
+					db    => $db,
+					id    => $journey->{id},
+					route => [@route_new]
+				);
 			}
 		}
 		{
 			my $cancelled_old = $journey->{cancelled}     // 0;
 			my $cancelled_new = $self->param('cancelled') // 0;
 			if ( $cancelled_old != $cancelled_new ) {
-				$error
-				  = $self->update_journey_part( $db, $journey->{id},
-					'cancelled', $cancelled_new );
+				$error = $self->journeys->update(
+					uid       => $uid,
+					db        => $db,
+					id        => $journey->{id},
+					cancelled => $cancelled_new
+				);
 			}
 		}
 
 		if ( not $error ) {
-			$journey = $self->get_journey(
+			$journey = $self->journeys->get_single(
 				uid           => $uid,
 				db            => $db,
 				journey_id    => $journey_id,
 				verbose       => 1,
 				with_datetime => 1,
 			);
-			$error = $self->journey_sanity_check($journey);
+			$error = $self->journeys->sanity_check($journey);
 		}
 		if ( not $error ) {
 			$tx->commit;
@@ -1108,18 +1150,19 @@ sub add_journey_form {
 		my $db = $self->pg->db;
 		my $tx = $db->begin;
 
-		$opt{db} = $db;
+		$opt{db}  = $db;
+		$opt{uid} = $self->current_user->{id};
 
-		my ( $journey_id, $error ) = $self->add_journey(%opt);
+		my ( $journey_id, $error ) = $self->journeys->add(%opt);
 
 		if ( not $error ) {
-			my $journey = $self->get_journey(
+			my $journey = $self->journeys->get_single(
 				uid        => $self->current_user->{id},
 				db         => $db,
 				journey_id => $journey_id,
 				verbose    => 1
 			);
-			$error = $self->journey_sanity_check($journey);
+			$error = $self->journeys->sanity_check($journey);
 		}
 
 		if ($error) {
diff --git a/lib/Travelynx/Model/Journeys.pm b/lib/Travelynx/Model/Journeys.pm
new file mode 100755
index 0000000..868b1bf
--- /dev/null
+++ b/lib/Travelynx/Model/Journeys.pm
@@ -0,0 +1,751 @@
+package Travelynx::Model::Journeys;
+
+use Geo::Distance;
+use List::MoreUtils qw(after_incl before_incl);
+use Travel::Status::DE::IRIS::Stations;
+
+use strict;
+use warnings;
+use 5.020;
+
+use DateTime;
+use JSON;
+
+sub epoch_to_dt {
+	my ($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 get_station {
+	my ( $station_name, $exact_match ) = @_;
+
+	my @candidates
+	  = Travel::Status::DE::IRIS::Stations::get_station($station_name);
+
+	if ( @candidates == 1 ) {
+		if ( not $exact_match ) {
+			return $candidates[0];
+		}
+		if (   $candidates[0][0] eq $station_name
+			or $candidates[0][1] eq $station_name
+			or $candidates[0][2] eq $station_name )
+		{
+			return $candidates[0];
+		}
+		return undef;
+	}
+	return undef;
+}
+
+sub grep_unknown_stations {
+	my (@stations) = @_;
+
+	my @unknown_stations;
+	for my $station (@stations) {
+		my $station_info = get_station($station);
+		if ( not $station_info ) {
+			push( @unknown_stations, $station );
+		}
+	}
+	return @unknown_stations;
+}
+
+sub new {
+	my ( $class, %opt ) = @_;
+
+	$opt{journey_edit_mask} = {
+		sched_departure => 0x0001,
+		real_departure  => 0x0002,
+		from_station    => 0x0004,
+		route           => 0x0010,
+		is_cancelled    => 0x0020,
+		sched_arrival   => 0x0100,
+		real_arrival    => 0x0200,
+		to_station      => 0x0400,
+	};
+
+	return bless( \%opt, $class );
+}
+
+# Returns (journey id, error)
+# Must be called during a transaction.
+# Must perform a rollback on error.
+sub add {
+	my ( $self, %opt ) = @_;
+
+	my $db          = $opt{db};
+	my $uid         = $opt{uid};
+	my $now         = DateTime->now( time_zone => 'Europe/Berlin' );
+	my $dep_station = get_station( $opt{dep_station} );
+	my $arr_station = get_station( $opt{arr_station} );
+
+	if ( not $dep_station ) {
+		return ( undef, 'Unbekannter Startbahnhof' );
+	}
+	if ( not $arr_station ) {
+		return ( undef, 'Unbekannter Zielbahnhof' );
+	}
+
+	my $daily_journey_count = $db->select(
+		'journeys_str',
+		'count(*) as count',
+		{
+			user_id     => $uid,
+			real_dep_ts => {
+				-between => [
+					$opt{rt_departure}->clone->subtract( days => 1 )->epoch,
+					$opt{rt_departure}->epoch
+				],
+			},
+		}
+	)->hash->{count};
+
+	if ( $daily_journey_count >= 100 ) {
+		return ( undef,
+"In den 24 Stunden vor der angegebenen Abfahrtszeit wurden ${daily_journey_count} weitere Fahrten angetreten. Das kann nicht stimmen."
+		);
+	}
+
+	my @route = ( [ $dep_station->[1], {}, undef ] );
+
+	if ( $opt{route} ) {
+		my @unknown_stations;
+		for my $station ( @{ $opt{route} } ) {
+			my $station_info = get_station($station);
+			if ($station_info) {
+				push( @route, [ $station_info->[1], {}, undef ] );
+			}
+			else {
+				push( @route, [ $station, {}, undef ] );
+				push( @unknown_stations, $station );
+			}
+		}
+
+		if ( not $opt{lax} ) {
+			if ( @unknown_stations == 1 ) {
+				return ( undef,
+					"Unbekannter Unterwegshalt: $unknown_stations[0]" );
+			}
+			elsif (@unknown_stations) {
+				return ( undef,
+					'Unbekannte Unterwegshalte: '
+					  . join( ', ', @unknown_stations ) );
+			}
+		}
+	}
+
+	push( @route, [ $arr_station->[1], {}, undef ] );
+
+	if ( $route[0][0] eq $route[1][0] ) {
+		shift(@route);
+	}
+
+	if ( $route[-2][0] eq $route[-1][0] ) {
+		pop(@route);
+	}
+
+	my $entry = {
+		user_id             => $uid,
+		train_type          => $opt{train_type},
+		train_line          => $opt{train_line},
+		train_no            => $opt{train_no},
+		train_id            => 'manual',
+		checkin_station_id  => $dep_station->[2],
+		checkin_time        => $now,
+		sched_departure     => $opt{sched_departure},
+		real_departure      => $opt{rt_departure},
+		checkout_station_id => $arr_station->[2],
+		sched_arrival       => $opt{sched_arrival},
+		real_arrival        => $opt{rt_arrival},
+		checkout_time       => $now,
+		edited              => 0x3fff,
+		cancelled           => $opt{cancelled} ? 1 : 0,
+		route               => JSON->new->encode( \@route ),
+	};
+
+	if ( $opt{comment} ) {
+		$entry->{user_data}
+		  = JSON->new->encode( { comment => $opt{comment} } );
+	}
+
+	my $journey_id = undef;
+	eval {
+		$journey_id
+		  = $db->insert( 'journeys', $entry, { returning => 'id' } )
+		  ->hash->{id};
+		$self->invalidate_stats_cache(
+			ts  => $opt{rt_departure},
+			db  => $db,
+			uid => $uid
+		);
+	};
+
+	if ($@) {
+		$self->{log}->error("add_journey($uid): $@");
+		return ( undef, 'add_journey failed: ' . $@ );
+	}
+
+	return ( $journey_id, undef );
+}
+
+sub update {
+	my ( $self, %opt ) = @_;
+
+	my $db         = $opt{db} // $self->{pg}->db;
+	my $uid        = $opt{uid};
+	my $journey_id = $opt{id};
+
+	my $rows;
+
+	my $journey = $self->get_single(
+		uid           => $uid,
+		db            => $db,
+		journey_id    => $journey_id,
+		with_datetime => 1,
+	);
+
+	eval {
+		if ( exists $opt{from_name} ) {
+			my $from_station = get_station( $opt{from_name}, 1 );
+			if ( not $from_station ) {
+				die("Unbekannter Startbahnhof\n");
+			}
+			$rows = $db->update(
+				'journeys',
+				{
+					checkin_station_id => $from_station->[2],
+					edited             => $journey->{edited} | 0x0004,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{to_name} ) {
+			my $to_station = get_station( $opt{to_name}, 1 );
+			if ( not $to_station ) {
+				die("Unbekannter Zielbahnhof\n");
+			}
+			$rows = $db->update(
+				'journeys',
+				{
+					checkout_station_id => $to_station->[2],
+					edited              => $journey->{edited} | 0x0400,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{sched_departure} ) {
+			$rows = $db->update(
+				'journeys',
+				{
+					sched_departure => $opt{sched_departure},
+					edited          => $journey->{edited} | 0x0001,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{rt_departure} ) {
+			$rows = $db->update(
+				'journeys',
+				{
+					real_departure => $opt{rt_departure},
+					edited         => $journey->{edited} | 0x0002,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+
+			# stats are partitioned by rt_departure -> both the cache for
+			# the old value (see bottom of this function) and the new value
+			# (here) must be invalidated.
+			$self->invalidate_stats_cache(
+				ts  => $opt{rt_departure},
+				db  => $db,
+				uid => $uid,
+			);
+		}
+		if ( exists $opt{sched_arrival} ) {
+			$rows = $db->update(
+				'journeys',
+				{
+					sched_arrival => $opt{sched_arrival},
+					edited        => $journey->{edited} | 0x0100,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{rt_arrival} ) {
+			$rows = $db->update(
+				'journeys',
+				{
+					real_arrival => $opt{rt_arrival},
+					edited       => $journey->{edited} | 0x0200,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{route} ) {
+			my @new_route = map { [ $_, {}, undef ] } @{ $opt{route} };
+			$rows = $db->update(
+				'journeys',
+				{
+					route  => JSON->new->encode( \@new_route ),
+					edited => $journey->{edited} | 0x0010,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{cancelled} ) {
+			$rows = $db->update(
+				'journeys',
+				{
+					cancelled => $opt{cancelled},
+					edited    => $journey->{edited} | 0x0020,
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( exists $opt{comment} ) {
+			$journey->{user_data}{comment} = $opt{comment};
+			$rows = $db->update(
+				'journeys',
+				{
+					user_data => JSON->new->encode( $journey->{user_data} ),
+				},
+				{
+					id => $journey_id,
+				}
+			)->rows;
+		}
+		if ( not defined $rows ) {
+			die("Invalid update key\n");
+		}
+	};
+
+	if ($@) {
+		$self->{log}->error("update($journey_id): $@");
+		return "update($journey_id): $@";
+	}
+	if ( $rows == 1 ) {
+		$self->invalidate_stats_cache(
+			ts  => $journey->{rt_departure},
+			db  => $db,
+			uid => $uid,
+		);
+		return undef;
+	}
+	return "update($journey_id): did not match any journey part";
+}
+
+sub delete {
+	my ( $self, %opt ) = @_;
+
+	my $uid            = $opt{uid};
+	my $db             = $opt{db} // $self->{pg}->db;
+	my $journey_id     = $opt{id};
+	my $checkin_epoch  = $opt{checkin};
+	my $checkout_epoch = $opt{checkout};
+
+	my @journeys = $self->get(
+		uid        => $uid,
+		journey_id => $journey_id
+	);
+	if ( @journeys == 0 ) {
+		return 'Journey not found';
+	}
+	my $journey = $journeys[0];
+
+	# Double-check (comparing both ID and action epoch) to make sure we
+	# are really deleting the right journey and the user isn't just
+	# playing around with POST requests.
+	if (   $journey->{id} != $journey_id
+		or $journey->{checkin_ts} != $checkin_epoch
+		or $journey->{checkout_ts} != $checkout_epoch )
+	{
+		return 'Invalid journey data';
+	}
+
+	my $rows;
+	eval {
+		$rows = $db->delete(
+			'journeys',
+			{
+				user_id => $uid,
+				id      => $journey_id,
+			}
+		)->rows;
+	};
+
+	if ($@) {
+		$self->{log}->error("Delete($uid, $journey_id): $@");
+		return 'DELETE failed: ' . $@;
+	}
+
+	if ( $rows == 1 ) {
+		$self->invalidate_stats_cache(
+			ts  => epoch_to_dt( $journey->{rt_dep_ts} ),
+			uid => $uid
+		);
+		return undef;
+	}
+	return sprintf( 'Deleted %d rows, expected 1', $rows );
+}
+
+sub get {
+	my ( $self, %opt ) = @_;
+
+	my $uid = $opt{uid};
+
+	# If get is called from inside a transaction, db
+	# specifies the database handle performing the transaction.
+	# Otherwise, we grab a fresh one.
+	my $db = $opt{db} // $self->{pg}->db;
+
+	my @select
+	  = (
+		qw(journey_id train_type train_line train_no checkin_ts sched_dep_ts real_dep_ts dep_eva checkout_ts sched_arr_ts real_arr_ts arr_eva cancelled edited route messages user_data)
+	  );
+	my %where = (
+		user_id   => $uid,
+		cancelled => 0
+	);
+	my %order = (
+		order_by => {
+			-desc => 'real_dep_ts',
+		}
+	);
+
+	if ( $opt{cancelled} ) {
+		$where{cancelled} = 1;
+	}
+
+	if ( $opt{limit} ) {
+		$order{limit} = $opt{limit};
+	}
+
+	if ( $opt{journey_id} ) {
+		$where{journey_id} = $opt{journey_id};
+		delete $where{cancelled};
+	}
+	elsif ( $opt{after} and $opt{before} ) {
+		$where{real_dep_ts}
+		  = { -between => [ $opt{after}->epoch, $opt{before}->epoch, ] };
+	}
+
+	if ( $opt{with_polyline} ) {
+		push( @select, 'polyline' );
+	}
+
+	my @travels;
+
+	my $res = $db->select( 'journeys_str', \@select, \%where, \%order );
+
+	for my $entry ( $res->expand->hashes->each ) {
+
+		my $ref = {
+			id           => $entry->{journey_id},
+			type         => $entry->{train_type},
+			line         => $entry->{train_line},
+			no           => $entry->{train_no},
+			from_eva     => $entry->{dep_eva},
+			checkin_ts   => $entry->{checkin_ts},
+			sched_dep_ts => $entry->{sched_dep_ts},
+			rt_dep_ts    => $entry->{real_dep_ts},
+			to_eva       => $entry->{arr_eva},
+			checkout_ts  => $entry->{checkout_ts},
+			sched_arr_ts => $entry->{sched_arr_ts},
+			rt_arr_ts    => $entry->{real_arr_ts},
+			messages     => $entry->{messages},
+			route        => $entry->{route},
+			edited       => $entry->{edited},
+			user_data    => $entry->{user_data},
+		};
+
+		if ( $opt{with_polyline} ) {
+			$ref->{polyline} = $entry->{polyline};
+		}
+
+		if ( my $station = $self->{station_by_eva}->{ $ref->{from_eva} } ) {
+			$ref->{from_ds100} = $station->[0];
+			$ref->{from_name}  = $station->[1];
+		}
+		if ( my $station = $self->{station_by_eva}->{ $ref->{to_eva} } ) {
+			$ref->{to_ds100} = $station->[0];
+			$ref->{to_name}  = $station->[1];
+		}
+
+		if ( $opt{with_datetime} ) {
+			$ref->{checkin} = epoch_to_dt( $ref->{checkin_ts} );
+			$ref->{sched_departure}
+			  = epoch_to_dt( $ref->{sched_dep_ts} );
+			$ref->{rt_departure}  = epoch_to_dt( $ref->{rt_dep_ts} );
+			$ref->{checkout}      = epoch_to_dt( $ref->{checkout_ts} );
+			$ref->{sched_arrival} = epoch_to_dt( $ref->{sched_arr_ts} );
+			$ref->{rt_arrival}    = epoch_to_dt( $ref->{rt_arr_ts} );
+		}
+
+		if ( $opt{verbose} ) {
+			my $rename = $self->{renamed_station};
+			for my $stop ( @{ $ref->{route} } ) {
+				if ( $rename->{ $stop->[0] } ) {
+					$stop->[0] = $rename->{ $stop->[0] };
+				}
+			}
+			$ref->{cancelled} = $entry->{cancelled};
+			my @parsed_messages;
+			for my $message ( @{ $ref->{messages} // [] } ) {
+				my ( $ts, $msg ) = @{$message};
+				push( @parsed_messages, [ epoch_to_dt($ts), $msg ] );
+			}
+			$ref->{messages} = [ reverse @parsed_messages ];
+			$ref->{sched_duration}
+			  = defined $ref->{sched_arr_ts}
+			  ? $ref->{sched_arr_ts} - $ref->{sched_dep_ts}
+			  : undef;
+			$ref->{rt_duration}
+			  = defined $ref->{rt_arr_ts}
+			  ? $ref->{rt_arr_ts} - $ref->{rt_dep_ts}
+			  : undef;
+			my ( $km_polyline, $km_route, $km_beeline, $skip )
+			  = $self->get_travel_distance($ref);
+			$ref->{km_route}     = $km_polyline || $km_route;
+			$ref->{skip_route}   = $km_polyline ? 0 : $skip;
+			$ref->{km_beeline}   = $km_beeline;
+			$ref->{skip_beeline} = $skip;
+			my $kmh_divisor
+			  = ( $ref->{rt_duration} // $ref->{sched_duration} // 999999 )
+			  / 3600;
+			$ref->{kmh_route}
+			  = $kmh_divisor ? $ref->{km_route} / $kmh_divisor : -1;
+			$ref->{kmh_beeline}
+			  = $kmh_divisor
+			  ? $ref->{km_beeline} / $kmh_divisor
+			  : -1;
+		}
+
+		push( @travels, $ref );
+	}
+
+	return @travels;
+}
+
+sub get_single {
+	my ( $self, %opt ) = @_;
+
+	$opt{cancelled} = 'any';
+	my @journeys = $self->get(%opt);
+	if ( @journeys == 0 ) {
+		return undef;
+	}
+
+	return $journeys[0];
+}
+
+sub get_oldest_ts {
+	my ( $self, %opt ) = @_;
+	my $uid = $opt{uid};
+	my $db  = $opt{db} // $self->{pg}->db;
+
+	my $res_h = $db->select(
+		'journeys_str',
+		['sched_dep_ts'],
+		{
+			user_id => $uid,
+		},
+		{
+			limit    => 1,
+			order_by => {
+				-asc => 'real_dep_ts',
+			},
+		}
+	)->hash;
+
+	if ($res_h) {
+		return epoch_to_dt( $res_h->{sched_dep_ts} );
+	}
+	return undef;
+}
+
+sub sanity_check {
+	my ( $self, $journey, $lax ) = @_;
+
+	if ( defined $journey->{sched_duration}
+		and $journey->{sched_duration} <= 0 )
+	{
+		return
+'Die geplante Dauer dieser Zugfahrt ist ≤ 0. Teleportation und Zeitreisen werden aktuell nicht unterstützt.';
+	}
+	if ( defined $journey->{rt_duration}
+		and $journey->{rt_duration} <= 0 )
+	{
+		return
+'Die Dauer dieser Zugfahrt ist ≤ 0. Teleportation und Zeitreisen werden aktuell nicht unterstützt.';
+	}
+	if (    $journey->{sched_duration}
+		and $journey->{sched_duration} > 60 * 60 * 24 )
+	{
+		return 'Die Zugfahrt ist länger als 24 Stunden.';
+	}
+	if (    $journey->{rt_duration}
+		and $journey->{rt_duration} > 60 * 60 * 24 )
+	{
+		return 'Die Zugfahrt ist länger als 24 Stunden.';
+	}
+	if ( $journey->{kmh_route} > 500 or $journey->{kmh_beeline} > 500 ) {
+		return 'Zugfahrten mit über 500 km/h? Schön wär\'s.';
+	}
+	if ( $journey->{route} and @{ $journey->{route} } > 99 ) {
+		my $stop_count = @{ $journey->{route} };
+		return
+"Die Zugfahrt hat $stop_count Unterwegshalte. Also ich weiß ja nicht so recht.";
+	}
+	if ( $journey->{edited} & 0x0010 and not $lax ) {
+		my @unknown_stations
+		  = grep_unknown_stations( map { $_->[0] } @{ $journey->{route} } );
+		if (@unknown_stations) {
+			return 'Unbekannte Station(en): ' . join( ', ', @unknown_stations );
+		}
+	}
+
+	return undef;
+}
+
+sub get_travel_distance {
+	my ( $self, $journey ) = @_;
+
+	my $from         = $journey->{from_name};
+	my $from_eva     = $journey->{from_eva};
+	my $to           = $journey->{to_name};
+	my $to_eva       = $journey->{to_eva};
+	my $route_ref    = $journey->{route};
+	my $polyline_ref = $journey->{polyline};
+
+	my $distance_polyline     = 0;
+	my $distance_intermediate = 0;
+	my $distance_beeline      = 0;
+	my $skipped               = 0;
+	my $geo                   = Geo::Distance->new();
+	my @stations              = map { $_->[0] } @{$route_ref};
+	my @route                 = after_incl { $_ eq $from } @stations;
+	@route = before_incl { $_ eq $to } @route;
+
+	if ( @route < 2 ) {
+
+		# I AM ERROR
+		return ( 0, 0, 0 );
+	}
+
+	my @polyline = after_incl { $_->[2] and $_->[2] == $from_eva }
+	@{ $polyline_ref // [] };
+	@polyline
+	  = before_incl { $_->[2] and $_->[2] == $to_eva } @polyline;
+
+	my $prev_station = shift @polyline;
+	for my $station (@polyline) {
+
+		#lonlatlonlat
+		$distance_polyline
+		  += $geo->distance( 'kilometer', $prev_station->[0],
+			$prev_station->[1], $station->[0], $station->[1] );
+		$prev_station = $station;
+	}
+
+	$prev_station = get_station( shift @route );
+	if ( not $prev_station ) {
+		return ( $distance_polyline, 0, 0 );
+	}
+
+	# Geo-coordinates for stations outside Germany are not available
+	# at the moment. When calculating distance with intermediate stops,
+	# these are simply left out (as if they were not part of the route).
+	# For beeline distance calculation, we use the route's first and last
+	# station with known geo-coordinates.
+	my $from_station_beeline;
+	my $to_station_beeline;
+
+	# $#{$station} >= 4    iff    $station has geocoordinates
+	for my $station_name (@route) {
+		if ( my $station = get_station($station_name) ) {
+			if ( not $from_station_beeline and $#{$prev_station} >= 4 ) {
+				$from_station_beeline = $prev_station;
+			}
+			if ( $#{$station} >= 4 ) {
+				$to_station_beeline = $station;
+			}
+			if ( $#{$prev_station} >= 4 and $#{$station} >= 4 ) {
+				$distance_intermediate
+				  += $geo->distance( 'kilometer', $prev_station->[3],
+					$prev_station->[4], $station->[3], $station->[4] );
+			}
+			else {
+				$skipped++;
+			}
+			$prev_station = $station;
+		}
+	}
+
+	if ( $from_station_beeline and $to_station_beeline ) {
+		$distance_beeline = $geo->distance(
+			'kilometer',                $from_station_beeline->[3],
+			$from_station_beeline->[4], $to_station_beeline->[3],
+			$to_station_beeline->[4]
+		);
+	}
+
+	return ( $distance_polyline, $distance_intermediate,
+		$distance_beeline, $skipped );
+}
+
+# Statistics are partitioned by real_departure, which must be provided
+# when calling this function e.g. after journey deletion or editing.
+# If a joureny's real_departure has been edited, this function must be
+# called twice: once with the old and once with the new value.
+sub invalidate_stats_cache {
+	my ( $self, %opt ) = @_;
+
+	my $ts  = $opt{ts};
+	my $db  = $opt{db} // $self->{pg}->db;
+	my $uid = $opt{uid};
+
+	$db->delete(
+		'journey_stats',
+		{
+			user_id => $uid,
+			year    => $ts->year,
+			month   => $ts->month,
+		}
+	);
+	$db->delete(
+		'journey_stats',
+		{
+			user_id => $uid,
+			year    => $ts->year,
+			month   => 0,
+		}
+	);
+}
+
+1;