e168d9cd39
Whether a user is in transit or not is now determined by an entry in the in_transit table instead of a dangling checkin. All completed journeys are stored in the "journeys" table. This does most of the work needed for automatic checkout. However, note that the corresponding worker process is not implemented yet.
428 lines
12 KiB
Perl
428 lines
12 KiB
Perl
package Travelynx::Command::database;
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use Mojo::Base 'Mojolicious::Command';
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use DateTime;
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has description => 'Initialize or upgrade database layout';
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has usage => sub { shift->extract_usage };
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sub get_schema_version {
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my ($db) = @_;
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my $version;
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eval {
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$version
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= $db->select( 'schema_version', ['version'] )->hash->{version};
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};
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if ($@) {
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# If it failed, the version table does not exist -> run setup first.
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return undef;
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}
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return $version;
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}
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sub initialize_db {
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my ($db) = @_;
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$db->query(
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qq{
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create table schema_version (
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version integer primary key
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);
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create table users (
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id serial not null primary key,
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name varchar(64) not null unique,
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status smallint not null,
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public_level smallint not null,
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email varchar(256),
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token varchar(80),
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password text,
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registered_at timestamptz not null,
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last_login timestamptz not null,
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deletion_requested timestamptz
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);
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create table stations (
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id serial not null primary key,
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ds100 varchar(16) not null unique,
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name varchar(64) not null unique
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);
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create table user_actions (
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id serial not null primary key,
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user_id integer not null references users (id),
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action_id smallint not null,
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station_id int references stations (id),
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action_time timestamptz not null,
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train_type varchar(16),
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train_line varchar(16),
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train_no varchar(16),
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train_id varchar(128),
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sched_time timestamptz,
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real_time timestamptz,
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route text,
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messages text
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);
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create table pending_mails (
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email varchar(256) not null primary key,
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num_tries smallint not null,
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last_try timestamptz not null
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);
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create table tokens (
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user_id integer not null references users (id),
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type smallint not null,
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token varchar(80) not null,
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primary key (user_id, type)
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);
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insert into schema_version values (0);
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}
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);
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}
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my @migrations = (
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# v0 -> v1
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sub {
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my ($db) = @_;
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$db->query(
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qq{
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alter table user_actions
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add column edited smallint;
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drop table if exists monthly_stats;
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create table journey_stats (
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user_id integer not null references users (id),
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year smallint not null,
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month smallint not null,
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data jsonb not null,
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primary key (user_id, year, month)
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);
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update schema_version set version = 1;
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}
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);
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},
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# v1 -> v2
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sub {
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my ($db) = @_;
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$db->query(
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qq{
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update user_actions set edited = 0;
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alter table user_actions
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alter column edited set not null;
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update schema_version set version = 2;
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}
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);
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},
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# v2 -> v3
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# A bug in the journey distance calculation caused excessive distances to be
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# reported for routes covering stations without GPS coordinates. Ensure
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# all caches are rebuilt.
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sub {
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my ($db) = @_;
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$db->query(
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qq{
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truncate journey_stats;
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update schema_version set version = 3;
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}
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);
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},
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# v3 -> v4
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# Introduces "journeys", containing one row for each complete
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# journey, and "in_transit", containing the journey which is currently
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# in progress (if any). "user_actions" is no longer used, but still kept
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# as a backup for now.
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sub {
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my ($db) = @_;
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$db->query(
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qq{
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create table journeys (
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id serial not null primary key,
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user_id integer not null references users (id),
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train_type varchar(16) not null,
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train_line varchar(16),
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train_no varchar(16) not null,
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train_id varchar(128) not null,
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checkin_station_id integer not null references stations (id),
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checkin_time timestamptz not null,
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sched_departure timestamptz not null,
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real_departure timestamptz not null,
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checkout_station_id integer not null references stations (id),
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checkout_time timestamptz not null,
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sched_arrival timestamptz,
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real_arrival timestamptz,
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cancelled boolean not null,
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edited smallint not null,
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route text,
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messages text
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);
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create table in_transit (
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user_id integer not null references users (id) primary key,
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train_type varchar(16) not null,
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train_line varchar(16),
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train_no varchar(16) not null,
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train_id varchar(128) not null,
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checkin_station_id integer not null references stations (id),
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checkin_time timestamptz not null,
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sched_departure timestamptz not null,
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real_departure timestamptz not null,
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checkout_station_id int references stations (id),
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checkout_time timestamptz,
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sched_arrival timestamptz,
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real_arrival timestamptz,
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cancelled boolean not null,
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route text,
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messages text
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);
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create view journeys_str as select
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journeys.id as journey_id, user_id,
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train_type, train_line, train_no, train_id,
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extract(epoch from checkin_time) as checkin_ts,
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extract(epoch from sched_departure) as sched_dep_ts,
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extract(epoch from real_departure) as real_dep_ts,
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dep_stations.ds100 as dep_ds100,
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dep_stations.name as dep_name,
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extract(epoch from checkout_time) as checkout_ts,
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extract(epoch from sched_arrival) as sched_arr_ts,
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extract(epoch from real_arrival) as real_arr_ts,
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arr_stations.ds100 as arr_ds100,
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arr_stations.name as arr_name,
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cancelled, edited, route, messages
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from journeys
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join stations as dep_stations on dep_stations.id = checkin_station_id
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join stations as arr_stations on arr_stations.id = checkout_station_id
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;
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create view in_transit_str as select
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user_id,
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train_type, train_line, train_no, train_id,
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extract(epoch from checkin_time) as checkin_ts,
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extract(epoch from sched_departure) as sched_dep_ts,
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extract(epoch from real_departure) as real_dep_ts,
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dep_stations.ds100 as dep_ds100,
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dep_stations.name as dep_name,
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extract(epoch from checkout_time) as checkout_ts,
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extract(epoch from sched_arrival) as sched_arr_ts,
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extract(epoch from real_arrival) as real_arr_ts,
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arr_stations.ds100 as arr_ds100,
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arr_stations.name as arr_name,
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cancelled, route, messages
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from in_transit
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join stations as dep_stations on dep_stations.id = checkin_station_id
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left join stations as arr_stations on arr_stations.id = checkout_station_id
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;
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}
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);
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my @uids
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= $db->select( 'users', ['id'] )->hashes->map( sub { shift->{id} } )
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->each;
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my $count = 0;
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for my $uid (@uids) {
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my %cache;
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my $prev_action_type = 0;
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my $actions = $db->select(
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'user_actions', '*',
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{ user_id => $uid },
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{ order_by => { -asc => 'id' } }
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);
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for my $action ( $actions->hashes->each ) {
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my $action_type = $action->{action_id};
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my $id = $action->{id};
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if ( $action_type == 2 and $prev_action_type != 1 ) {
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die(
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"Inconsistent data at uid ${uid} action ${id}: Illegal transition $prev_action_type -> $action_type.\n"
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);
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}
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if ( $action_type == 5 and $prev_action_type != 4 ) {
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die(
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"Inconsistent data at uid ${uid} action ${id}: Illegal transition $prev_action_type -> $action_type.\n"
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);
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}
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if ( $action_type == 1 or $action_type == 4 ) {
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%cache = (
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train_type => $action->{train_type},
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train_line => $action->{train_line},
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train_no => $action->{train_no},
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train_id => $action->{train_id},
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checkin_station_id => $action->{station_id},
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checkin_time => $action->{action_time},
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sched_departure => $action->{sched_time},
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real_departure => $action->{real_time},
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route => $action->{route},
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messages => $action->{messages},
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cancelled => $action->{action_id} == 4 ? 1 : 0,
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edited => $action->{edited},
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);
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}
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elsif ( $action_type == 2 or $action_type == 5 ) {
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$cache{checkout_station_id} = $action->{station_id};
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$cache{checkout_time} = $action->{action_time};
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$cache{sched_arrival} = $action->{sched_time};
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$cache{real_arrival} = $action->{real_time};
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$cache{edited} |= $action->{edited} << 8;
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if ( $action->{route} ) {
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$cache{route} = $action->{route};
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}
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if ( $action->{messages} ) {
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$cache{messages} = $action->{messages};
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}
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$db->insert(
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'journeys',
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{
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user_id => $uid,
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train_type => $cache{train_type},
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train_line => $cache{train_line},
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train_no => $cache{train_no},
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train_id => $cache{train_id},
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checkin_station_id => $cache{checkin_station_id},
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checkin_time => $cache{checkin_time},
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sched_departure => $cache{sched_departure},
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real_departure => $cache{real_departure},
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checkout_station_id => $cache{checkout_station_id},
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checkout_time => $cache{checkout_time},
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sched_arrival => $cache{sched_arrival},
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real_arrival => $cache{real_arrival},
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cancelled => $cache{cancelled},
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edited => $cache{edited},
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route => $cache{route},
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messages => $cache{messages}
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}
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);
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%cache = ();
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}
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$prev_action_type = $action_type;
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}
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if (%cache) {
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# user is currently in transit
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$db->insert(
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'in_transit',
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{
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user_id => $uid,
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train_type => $cache{train_type},
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train_line => $cache{train_line},
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train_no => $cache{train_no},
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train_id => $cache{train_id},
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checkin_station_id => $cache{checkin_station_id},
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checkin_time => $cache{checkin_time},
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sched_departure => $cache{sched_departure},
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real_departure => $cache{real_departure},
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cancelled => $cache{cancelled},
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route => $cache{route},
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messages => $cache{messages}
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}
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);
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}
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$count++;
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printf( " journey storage migration: %3.0f%% complete\n",
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$count * 100 / @uids );
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}
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$db->update( 'schema_version', { version => 4 } );
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},
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);
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sub setup_db {
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my ($db) = @_;
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my $tx = $db->begin;
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eval {
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initialize_db($db);
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$tx->commit;
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};
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if ($@) {
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say "Database initialization failed: $@";
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exit(1);
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}
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}
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sub migrate_db {
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my ($db) = @_;
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my $tx = $db->begin;
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my $schema_version = get_schema_version($db);
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say "Found travelynx schema v${schema_version}";
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if ( $schema_version == @migrations ) {
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say "Database layout is up-to-date";
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}
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eval {
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for my $i ( $schema_version .. $#migrations ) {
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printf( "Updating to v%d ...\n", $i + 1 );
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$migrations[$i]($db);
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}
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};
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if ($@) {
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say STDERR "Migration failed: $@";
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say STDERR "Rolling back to v${schema_version}";
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exit(1);
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}
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if ( get_schema_version($db) == @migrations ) {
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$tx->commit;
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}
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else {
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printf STDERR (
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"Database schema mismatch after migrations: Expected %d, got %d\n",
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scalar @migrations,
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get_schema_version($db)
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);
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say STDERR "Rolling back to v${schema_version}";
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exit(1);
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}
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}
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sub run {
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my ( $self, $command ) = @_;
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my $db = $self->app->pg->db;
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#if ( not defined $dbh ) {
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# printf( "Can't connect to the database: %s\n", $DBI::errstr );
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# exit(1);
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#}
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if ( $command eq 'migrate' ) {
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if ( not defined get_schema_version($db) ) {
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setup_db($db);
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}
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migrate_db($db);
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}
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elsif ( $command eq 'has-current-schema' ) {
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if ( get_schema_version($db) == @migrations ) {
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say "yes";
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}
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else {
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say "no";
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exit(1);
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}
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}
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else {
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$self->help;
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}
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}
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1;
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__END__
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=head1 SYNOPSIS
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Usage: index.pl database <migrate|has-current-schema>
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Upgrades the database layout to the latest schema.
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Recommended workflow:
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> systemctl stop travelynx
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> perl index.pl migrate
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> systemctl start travelynx
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