From 21fe8a6990e996a556066e0142ede258df429a5b Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Thu, 21 Mar 2019 22:12:45 +0100
Subject: Initiate transition to a Mojolicious MVC web application

---
 lib/Travelynx/Controller/Api.pm       | 126 ++++++++++++++++++
 lib/Travelynx/Controller/Login.pm     | 230 ++++++++++++++++++++++++++++++++
 lib/Travelynx/Controller/Traveling.pm | 241 ++++++++++++++++++++++++++++++++++
 3 files changed, 597 insertions(+)
 create mode 100755 lib/Travelynx/Controller/Api.pm
 create mode 100755 lib/Travelynx/Controller/Login.pm
 create mode 100755 lib/Travelynx/Controller/Traveling.pm

(limited to 'lib/Travelynx')

diff --git a/lib/Travelynx/Controller/Api.pm b/lib/Travelynx/Controller/Api.pm
new file mode 100755
index 0000000..435c644
--- /dev/null
+++ b/lib/Travelynx/Controller/Api.pm
@@ -0,0 +1,126 @@
+package Travelynx::Controller::Api;
+use Mojo::Base 'Mojolicious::Controller';
+
+use Travel::Status::DE::IRIS::Stations;
+use UUID::Tiny qw(:std);
+
+my %token_type   = (
+	status  => 1,
+	history => 2,
+	action  => 3,
+);
+my @token_types = (qw(status history action));
+
+sub make_token {
+	return create_uuid_as_string(UUID_V4);
+}
+
+sub get_v0 {
+	my ($self) = @_;
+
+	my $api_action = $self->stash('user_action');
+	my $api_token  = $self->stash('token');
+	if ( $api_action !~ qr{ ^ (?: status | history | action ) $ }x ) {
+		$self->render(
+			json => {
+				error => 'Invalid action',
+			},
+		);
+		return;
+	}
+	if ( $api_token !~ qr{ ^ (?<id> \d+ ) - (?<token> .* ) $ }x ) {
+		$self->render(
+			json => {
+				error => 'Malformed token',
+			},
+		);
+		return;
+	}
+	my $uid = $+{id};
+	$api_token = $+{token};
+	my $token = $self->get_api_token($uid);
+	if ( $api_token ne $token->{$api_action} ) {
+		$self->render(
+			json => {
+				error => 'Invalid token',
+			},
+		);
+		return;
+	}
+	if ( $api_action eq 'status' ) {
+		my $status = $self->get_user_status($uid);
+
+		my @station_descriptions;
+		my $station_eva = undef;
+		my $station_lon = undef;
+		my $station_lat = undef;
+
+		if ( $status->{station_ds100} ) {
+			@station_descriptions
+			  = Travel::Status::DE::IRIS::Stations::get_station(
+				$status->{station_ds100} );
+		}
+		if ( @station_descriptions == 1 ) {
+			( undef, undef, $station_eva, $station_lon, $station_lat )
+			  = @{ $station_descriptions[0] };
+		}
+		$self->render(
+			json => {
+				deprecated => \0,
+				checked_in => (
+					     $status->{checked_in}
+					  or $status->{cancelled}
+				) ? \1 : \0,
+				station => {
+					ds100     => $status->{station_ds100},
+					name      => $status->{station_name},
+					uic       => $station_eva,
+					longitude => $station_lon,
+					latitude  => $station_lat,
+				},
+				train => {
+					type => $status->{train_type},
+					line => $status->{train_line},
+					no   => $status->{train_no},
+				},
+				actionTime    => $status->{timestamp}->epoch,
+				scheduledTime => $status->{sched_ts}->epoch,
+				realTime      => $status->{real_ts}->epoch,
+			},
+		);
+	}
+	else {
+		$self->render(
+			json => {
+				error => 'not implemented',
+			},
+		);
+	}
+}
+
+sub set_token {
+	my ($self) = @_;
+	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
+		$self->render( 'account', invalid => 'csrf' );
+		return;
+	}
+	my $token    = make_token();
+	my $token_id = $token_type{ $self->param('token') };
+
+	if ( not $token_id ) {
+		$self->redirect_to('account');
+		return;
+	}
+
+	if ( $self->param('action') eq 'delete' ) {
+		$self->app->drop_api_token_query->execute( $self->current_user->{id},
+			$token_id );
+	}
+	else {
+		$self->app->set_api_token_query->execute( $self->current_user->{id},
+			$token_id, $token );
+	}
+	$self->redirect_to('account');
+}
+
+1;
diff --git a/lib/Travelynx/Controller/Login.pm b/lib/Travelynx/Controller/Login.pm
new file mode 100755
index 0000000..9752414
--- /dev/null
+++ b/lib/Travelynx/Controller/Login.pm
@@ -0,0 +1,230 @@
+package Travelynx::Controller::Login;
+use Mojo::Base 'Mojolicious::Controller';
+
+use Crypt::Eksblowfish::Bcrypt qw(bcrypt en_base64);
+use Encode qw(decode encode);
+use Email::Sender::Simple qw(try_to_sendmail);
+use Email::Simple;
+use UUID::Tiny qw(:std);
+
+sub hash_password {
+	my ($password) = @_;
+	my @salt_bytes = map { int( rand(255) ) + 1 } ( 1 .. 16 );
+	my $salt = en_base64( pack( 'C[16]', @salt_bytes ) );
+
+	return bcrypt( $password, '$2a$12$' . $salt );
+}
+
+sub make_token {
+	return create_uuid_as_string(UUID_V4);
+}
+
+sub login_form {
+	my ($self) = @_;
+	$self->render('login');
+}
+
+sub do_login {
+	my ($self)   = @_;
+	my $user     = $self->req->param('user');
+	my $password = $self->req->param('password');
+
+	# Keep cookies for 6 months
+	$self->session( expiration => 60 * 60 * 24 * 180 );
+
+	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
+		$self->render(
+			'login',
+			invalid => 'csrf',
+		);
+	}
+	else {
+		if ( $self->authenticate( $user, $password ) ) {
+			$self->redirect_to( $self->req->param('redirect_to') // '/' );
+		}
+		else {
+			my $data = $self->get_user_password($user);
+			if ( $data and $data->{status} == 0 ) {
+				$self->render( 'login', invalid => 'confirmation' );
+			}
+			else {
+				$self->render( 'login', invalid => 'credentials' );
+			}
+		}
+	}
+}
+
+sub registration_form {
+	my ($self) = @_;
+	$self->render('register');
+}
+
+sub register {
+	my ($self)    = @_;
+	my $user      = $self->req->param('user');
+	my $email     = $self->req->param('email');
+	my $password  = $self->req->param('password');
+	my $password2 = $self->req->param('password2');
+	my $ip        = $self->req->headers->header('X-Forwarded-For');
+	my $ua        = $self->req->headers->user_agent;
+	my $date = DateTime->now( time_zone => 'Europe/Berlin' )
+	  ->strftime('%d.%m.%Y %H:%M:%S %z');
+
+	# In case Mojolicious is not running behind a reverse proxy
+	$ip
+	  //= sprintf( '%s:%s', $self->tx->remote_address, $self->tx->remote_port );
+
+	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
+		$self->render(
+			'register',
+			invalid => 'csrf',
+		);
+		return;
+	}
+
+	if ( not length($user) ) {
+		$self->render( 'register', invalid => 'user_empty' );
+		return;
+	}
+
+	if ( not length($email) ) {
+		$self->render( 'register', invalid => 'mail_empty' );
+		return;
+	}
+
+	if ( $user !~ m{ ^ [0-9a-zA-Z_-]+ $ }x ) {
+		$self->render( 'register', invalid => 'user_format' );
+		return;
+	}
+
+	if ( $self->check_if_user_name_exists($user) ) {
+		$self->render( 'register', invalid => 'user_collision' );
+		return;
+	}
+
+	if ( $self->check_if_mail_is_blacklisted($email) ) {
+		$self->render( 'register', invalid => 'mail_blacklisted' );
+		return;
+	}
+
+	if ( $password ne $password2 ) {
+		$self->render( 'register', invalid => 'password_notequal' );
+		return;
+	}
+
+	if ( length($password) < 8 ) {
+		$self->render( 'register', invalid => 'password_short' );
+		return;
+	}
+
+	my $token   = make_token();
+	my $pw_hash = hash_password($password);
+	$self->app->dbh->begin_work;
+	my $user_id     = $self->add_user( $user, $email, $token, $pw_hash );
+	my $reg_url     = $self->url_for('reg')->to_abs->scheme('https');
+	my $imprint_url = $self->url_for('impressum')->to_abs->scheme('https');
+
+	my $body = "Hallo, ${user}!\n\n";
+	$body .= "Mit deiner E-Mail-Adresse (${email}) wurde ein Account bei\n";
+	$body .= "travelynx angelegt.\n\n";
+	$body
+	  .= "Falls die Registrierung von dir ausging, kannst du den Account unter\n";
+	$body .= "${reg_url}/${user_id}/${token}\n";
+	$body .= "freischalten.\n\n";
+	$body
+	  .= "Falls nicht, ignoriere diese Mail bitte. Nach etwa 48 Stunden wird deine\n";
+	$body
+	  .= "Mail-Adresse erneut zur Registrierung freigeschaltet. Falls auch diese fehlschlägt,\n";
+	$body
+	  .= "werden wir sie dauerhaft sperren und keine Mails mehr dorthin schicken.\n\n";
+	$body .= "Daten zur Registrierung:\n";
+	$body .= " * Datum: ${date}\n";
+	$body .= " * Verwendete IP: ${ip}\n";
+	$body .= " * Verwendeter Browser gemäß User Agent: ${ua}\n\n\n";
+	$body .= "Impressum: ${imprint_url}\n";
+
+	my $reg_mail = Email::Simple->create(
+		header => [
+			To             => $email,
+			From           => 'Travelynx <travelynx@finalrewind.org>',
+			Subject        => 'Registrierung bei travelynx',
+			'Content-Type' => 'text/plain; charset=UTF-8',
+		],
+		body => encode( 'utf-8', $body ),
+	);
+
+	my $success = try_to_sendmail($reg_mail);
+	if ($success) {
+		$self->app->dbh->commit;
+		$self->render( 'login', from => 'register' );
+	}
+	else {
+		$self->app->dbh->rollback;
+		$self->render( 'register', invalid => 'sendmail' );
+	}
+}
+
+sub verify {
+	my ($self) = @_;
+
+	my $id    = $self->stash('id');
+	my $token = $self->stash('token');
+
+	my @db_user = $self->get_user_token($id);
+
+	if ( not @db_user ) {
+		$self->render( 'register', invalid => 'token' );
+		return;
+	}
+
+	my ( $db_name, $db_status, $db_token ) = @db_user;
+
+	if ( not $db_name or $token ne $db_token or $db_status != 0 ) {
+		$self->render( 'register', invalid => 'token' );
+		return;
+	}
+	$self->app->set_status_query->execute( 1, $id );
+	$self->render( 'login', from => 'verification' );
+}
+
+sub delete {
+	my ($self) = @_;
+	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
+		$self->render( 'account', invalid => 'csrf' );
+		return;
+	}
+
+	my $now = DateTime->now( time_zone => 'Europe/Berlin' )->epoch;
+
+	if ( $self->param('action') eq 'delete' ) {
+		if (
+			not $self->authenticate(
+				$self->current_user->{name},
+				$self->param('password')
+			)
+		  )
+		{
+			$self->render( 'account', invalid => 'password' );
+			return;
+		}
+		$self->app->mark_for_deletion_query->execute( $now,
+			$self->current_user->{id} );
+	}
+	else {
+		$self->app->mark_for_deletion_query->execute( undef,
+			$self->current_user->{id} );
+	}
+	$self->redirect_to('account');
+}
+
+sub do_logout {
+	my ($self) = @_;
+	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
+		$self->render( 'login', invalid => 'csrf' );
+		return;
+	}
+	$self->logout;
+	$self->redirect_to('/login');
+}
+
+1;
diff --git a/lib/Travelynx/Controller/Traveling.pm b/lib/Travelynx/Controller/Traveling.pm
new file mode 100755
index 0000000..8d71d95
--- /dev/null
+++ b/lib/Travelynx/Controller/Traveling.pm
@@ -0,0 +1,241 @@
+package Travelynx::Controller::Traveling;
+use Mojo::Base 'Mojolicious::Controller';
+
+use Travel::Status::DE::IRIS::Stations;
+
+my %action_type = (
+	checkin        => 1,
+	checkout       => 2,
+	undo           => 3,
+	cancelled_from => 4,
+	cancelled_to   => 5,
+);
+my @action_types = (qw(checkin checkout undo cancelled_from cancelled_to));
+
+sub homepage {
+	my ($self) = @_;
+	if ( $self->is_user_authenticated ) {
+		$self->render( 'landingpage', with_geolocation => 1 );
+	}
+	else {
+		$self->render( 'landingpage', intro => 1 );
+	}
+}
+
+sub geolocation {
+	my ($self) = @_;
+
+	my $lon = $self->param('lon');
+	my $lat = $self->param('lat');
+
+	if ( not $lon or not $lat ) {
+		$self->render( json => { error => 'Invalid lon/lat received' } );
+	}
+	else {
+		my @candidates = map {
+			{
+				ds100    => $_->[0][0],
+				name     => $_->[0][1],
+				eva      => $_->[0][2],
+				lon      => $_->[0][3],
+				lat      => $_->[0][4],
+				distance => $_->[1],
+			}
+		} Travel::Status::DE::IRIS::Stations::get_station_by_location( $lon,
+			$lat, 5 );
+		$self->render(
+			json => {
+				candidates => [@candidates],
+			}
+		);
+	}
+}
+
+sub log_action {
+	my ($self) = @_;
+	my $params = $self->req->json;
+
+	if ( not exists $params->{action} ) {
+		$params = $self->req->params->to_hash;
+	}
+
+	if ( not $self->is_user_authenticated ) {
+
+		# We deliberately do not set the HTTP status for these replies, as it
+		# confuses jquery.
+		$self->render(
+			json => {
+				success => 0,
+				error   => 'Session error, please login again',
+			},
+		);
+		return;
+	}
+
+	if ( not $params->{action} ) {
+		$self->render(
+			json => {
+				success => 0,
+				error   => 'Missing action value',
+			},
+		);
+		return;
+	}
+
+	my $station = $params->{station};
+
+	if ( $params->{action} eq 'checkin' ) {
+
+		my ( $train, $error )
+		  = $self->checkin( $params->{station}, $params->{train} );
+
+		if ($error) {
+			$self->render(
+				json => {
+					success => 0,
+					error   => $error,
+				},
+			);
+		}
+		else {
+			$self->render(
+				json => {
+					success => 1,
+				},
+			);
+		}
+	}
+	elsif ( $params->{action} eq 'checkout' ) {
+		my $error = $self->checkout( $params->{station}, $params->{force} );
+
+		if ($error) {
+			$self->render(
+				json => {
+					success => 0,
+					error   => $error,
+				},
+			);
+		}
+		else {
+			$self->render(
+				json => {
+					success => 1,
+				},
+			);
+		}
+	}
+	elsif ( $params->{action} eq 'undo' ) {
+		my $error = $self->undo;
+		if ($error) {
+			$self->render(
+				json => {
+					success => 0,
+					error   => $error,
+				},
+			);
+		}
+		else {
+			$self->render(
+				json => {
+					success => 1,
+				},
+			);
+		}
+	}
+	elsif ( $params->{action} eq 'cancelled_from' ) {
+		my ( undef, $error )
+		  = $self->checkin( $params->{station}, $params->{train},
+			$action_type{cancelled_from} );
+
+		if ($error) {
+			$self->render(
+				json => {
+					success => 0,
+					error   => $error,
+				},
+			);
+		}
+		else {
+			$self->render(
+				json => {
+					success => 1,
+				},
+			);
+		}
+	}
+	elsif ( $params->{action} eq 'cancelled_to' ) {
+		my $error = $self->checkout( $params->{station}, 1,
+			$action_type{cancelled_to} );
+
+		if ($error) {
+			$self->render(
+				json => {
+					success => 0,
+					error   => $error,
+				},
+			);
+		}
+		else {
+			$self->render(
+				json => {
+					success => 1,
+				},
+			);
+		}
+	}
+	else {
+		$self->render(
+			json => {
+				success => 0,
+				error   => 'invalid action value',
+			},
+		);
+	}
+}
+
+sub station {
+	my ($self)  = @_;
+	my $station = $self->stash('station');
+	my $train   = $self->param('train');
+
+	my $status = $self->get_departures($station);
+
+	if ( $status->{errstr} ) {
+		$self->render(
+			'landingpage',
+			with_geolocation => 1,
+			error            => $status->{errstr}
+		);
+	}
+	else {
+		# You can't check into a train which terminates here
+		my @results = grep { $_->departure } @{ $status->{results} };
+
+		@results = map { $_->[0] }
+		  sort { $b->[1] <=> $a->[1] }
+		  map { [ $_, $_->departure->epoch // $_->sched_departure->epoch ] }
+		  @results;
+
+		if ($train) {
+			@results
+			  = grep { $_->type . ' ' . $_->train_no eq $train } @results;
+		}
+
+		$self->render(
+			'departures',
+			ds100   => $status->{station_ds100},
+			results => \@results,
+			station => $status->{station_name},
+			title   => "travelynx: $status->{station_name}",
+		);
+	}
+}
+
+sub redirect_to_station {
+	my ($self) = @_;
+	my $station = $self->param('station');
+
+	$self->redirect_to("/s/${station}");
+}
+
+1;
-- 
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