From c4a60375f4ca72f112d9e8cd4aaea12acb474c75 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sat, 6 Apr 2019 21:08:36 +0200
Subject: Add a database command for database setup and migrations

---
 lib/Travelynx/Command/database.pm | 131 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 lib/Travelynx/Command/database.pm

(limited to 'lib')

diff --git a/lib/Travelynx/Command/database.pm b/lib/Travelynx/Command/database.pm
new file mode 100644
index 0000000..e501e47
--- /dev/null
+++ b/lib/Travelynx/Command/database.pm
@@ -0,0 +1,131 @@
+package Travelynx::Command::database;
+use Mojo::Base 'Mojolicious::Command';
+
+use DateTime;
+
+has description => 'Initialize or upgrade database layout';
+
+has usage => sub { shift->extract_usage };
+
+sub get_schema_version {
+	my ($dbh) = @_;
+	for my $entry (
+		$dbh->selectall_array(qq{select version from schema_version}) )
+	{
+		return $entry->[0];
+	}
+}
+
+sub initialize_db {
+	my ($dbh) = @_;
+	return $dbh->do(
+		qq{
+			create table schema_version (
+				version integer primary key
+			);
+			create table users (
+				id serial not null primary key,
+				name varchar(64) not null unique,
+				status smallint not null,
+				public_level smallint not null,
+				email varchar(256),
+				token varchar(80),
+				password text,
+				registered_at timestamptz not null,
+				last_login timestamptz not null,
+				deletion_requested timestamptz
+			);
+			create table stations (
+				id serial not null primary key,
+				ds100 varchar(16) not null unique,
+				name varchar(64) not null unique
+			);
+			create table user_actions (
+				id serial not null primary key,
+				user_id integer not null references users (id),
+				action_id smallint not null,
+				station_id int references stations (id),
+				action_time timestamptz not null,
+				train_type varchar(16),
+				train_line varchar(16),
+				train_no varchar(16),
+				train_id varchar(128),
+				sched_time timestamptz,
+				real_time timestamptz,
+				route text,
+				messages text
+			);
+			create table pending_mails (
+				email varchar(256) not null primary key,
+				num_tries smallint not null,
+				last_try timestamptz not null
+			);
+			create table tokens (
+				user_id integer not null references users (id),
+				type smallint not null,
+				token varchar(80) not null,
+				primary key (user_id, type)
+			);
+			insert into schema_version values (0);
+		}
+	);
+}
+
+my @migrations = ();
+
+sub run {
+	my ( $self, $command ) = @_;
+
+	my $dbh = $self->app->dbh;
+
+	if ( $command eq 'setup' ) {
+		$dbh->begin_work;
+		if ( initialize_db($dbh) ) {
+			$dbh->commit;
+		}
+		else {
+			$dbh->rollback;
+		}
+	}
+	elsif ( $command eq 'migrate' ) {
+		$dbh->begin_work;
+		my $schema_version = get_schema_version($dbh);
+		say "Found travelynx schema v${schema_version}";
+		if ( $schema_version == @migrations ) {
+			say "Database layout is up-to-date";
+		}
+		for my $i ( $schema_version .. $#migrations ) {
+			printf( "Updating to v%d ...\n", $i + 1 );
+			if ( not $migrations[$i]() ) {
+				say "Aborting migration; rollback to v${schema_version}";
+				$dbh->rollback;
+				last;
+			}
+		}
+		if ( get_schema_version($dbh) == $#migrations ) {
+			$dbh->commit;
+		}
+	}
+	else {
+		$self->help;
+	}
+
+	$dbh->disconnect;
+
+}
+
+1;
+
+__END__
+
+=head1 SYNOPSIS
+
+  Usage: index.pl database <setup|migrate>
+
+  Upgrades the database layout to the latest schema.
+
+  Recommended workflow:
+  > systemctl stop travelynx
+  > TRAVELYNX_DB_HOST=... TRAVELYNX_DB_NAME=... TRAVELYNX_DB_USER=... \
+    TRAVELYNX_DB_PASSWORD=... perl index.pl migrate
+  > systemctl start travelynx
-- 
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