2019-04-06 19:08:36 +00:00
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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 ($dbh) = @_;
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2019-04-13 21:36:58 +00:00
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2019-04-14 06:44:27 +00:00
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# We do not want DBD to print an SQL error if schema_version does not
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# exist, as this is not an error in this case. Setting $dbh->{PrintError} =
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# 0 would disable error printing for all subsequent SQL operations, however,
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# we only want to disable it for this specific query. Hence we use a
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# prepared statement and only disable error printing only there.
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my $sth = $dbh->prepare(qq{select version from schema_version});
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$sth->{PrintError} = 0;
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my $success = $sth->execute;
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if ( not defined $success ) {
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2019-04-13 21:36:58 +00:00
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return undef;
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}
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2019-04-14 06:44:27 +00:00
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my $rows = $sth->fetchall_arrayref;
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if ( @{$rows} == 1 ) {
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return $rows->[0][0];
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2019-04-13 21:36:58 +00:00
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}
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else {
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2019-04-14 06:44:27 +00:00
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printf( "Found multiple schema versions: %s", @{$rows} );
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2019-04-13 21:36:58 +00:00
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exit(1);
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2019-04-06 19:08:36 +00:00
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}
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}
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sub initialize_db {
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my ($dbh) = @_;
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return $dbh->do(
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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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2019-04-13 21:36:58 +00:00
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insert into schema_version values (0);
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2019-04-06 19:08:36 +00:00
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}
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);
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}
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2019-04-07 14:55:35 +00:00
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my @migrations = (
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# v0 -> v1
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sub {
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my ($dbh) = @_;
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return $dbh->do(
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qq{
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alter table user_actions
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add column edited smallint;
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drop table if exists monthly_stats;
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create table journey_stats (
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user_id integer not null references users (id),
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year smallint not null,
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month smallint not null,
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data jsonb not null,
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primary key (user_id, year, month)
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);
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update schema_version set version = 1;
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}
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);
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},
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2019-04-09 16:37:21 +00:00
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# v1 -> v2
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sub {
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my ($dbh) = @_;
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return $dbh->do(
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qq{
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update user_actions set edited = 0;
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alter table user_actions
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alter column edited set not null;
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update schema_version set version = 2;
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}
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);
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},
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2019-04-07 14:55:35 +00:00
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);
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2019-04-06 19:08:36 +00:00
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2019-04-13 21:36:58 +00:00
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sub setup_db {
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my ($dbh) = @_;
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$dbh->begin_work;
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if ( initialize_db($dbh) ) {
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$dbh->commit;
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}
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else {
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$dbh->rollback;
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printf( "Database initialization was not successful: %s",
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$DBI::errstr );
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}
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}
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sub migrate_db {
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my ($dbh) = @_;
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$dbh->begin_work;
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my $schema_version = get_schema_version($dbh);
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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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for my $i ( $schema_version .. $#migrations ) {
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printf( "Updating to v%d ...\n", $i + 1 );
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if ( not $migrations[$i]($dbh) ) {
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say "Aborting migration; rollback to v${schema_version}";
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$dbh->rollback;
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exit(1);
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}
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}
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if ( get_schema_version($dbh) == @migrations ) {
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$dbh->commit;
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}
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}
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2019-04-06 19:08:36 +00:00
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sub run {
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my ( $self, $command ) = @_;
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my $dbh = $self->app->dbh;
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2019-04-13 21:36:58 +00:00
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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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2019-04-06 19:08:36 +00:00
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}
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2019-04-13 21:36:58 +00:00
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if ( $command eq 'migrate' ) {
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if ( not defined get_schema_version($dbh) ) {
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setup_db($dbh);
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2019-04-06 19:08:36 +00:00
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}
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2019-04-13 21:36:58 +00:00
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migrate_db($dbh);
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2019-04-06 19:08:36 +00:00
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}
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2019-04-07 12:18:56 +00:00
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elsif ( $command eq 'has-current-schema' ) {
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2019-04-07 14:55:35 +00:00
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if ( get_schema_version($dbh) == @migrations ) {
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2019-04-07 12:18:56 +00:00
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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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2019-04-13 21:36:58 +00:00
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exit(1);
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2019-04-07 12:18:56 +00:00
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}
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}
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2019-04-06 19:08:36 +00:00
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else {
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$self->help;
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}
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$dbh->disconnect;
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}
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1;
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__END__
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=head1 SYNOPSIS
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2019-04-13 21:36:58 +00:00
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Usage: index.pl database <migrate|has-current-schema>
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2019-04-06 19:08:36 +00:00
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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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2019-04-13 21:36:58 +00:00
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> perl index.pl migrate
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2019-04-06 19:08:36 +00:00
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> systemctl start travelynx
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