moonfire-nvr/db/upgrade/v3_to_v4.rs
Scott Lamb 7dd98bb76a db crate support for updating signals (#28)
This is a definite work in progress. In particular,

* there's no src/web.rs support yet so it can't be used,
* the code is surprisingly complex, and there's almost no tests so far.
  I want to at least get complete branch coverage.
* I may still go back to time_sec rather than time_90k to save RAM and
  flash.

I simplified the approach a bit from the earlier goal in design/api.md.
In particular, there's no longer the separate concept of "observation"
vs "prediction". Now the predictions are just observations that extend a
bit beyond now. They may be flushed prematurely and I'll try living with
that to avoid making things even more complex.
2019-06-13 22:25:55 -07:00

68 lines
2.7 KiB
Rust

// This file is part of Moonfire NVR, a security camera digital video recorder.
// Copyright (C) 2018 Scott Lamb <slamb@slamb.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// In addition, as a special exception, the copyright holders give
// permission to link the code of portions of this program with the
// OpenSSL library under certain conditions as described in each
// individual source file, and distribute linked combinations including
// the two.
//
// You must obey the GNU General Public License in all respects for all
// of the code used other than OpenSSL. If you modify file(s) with this
// exception, you may extend this exception to your version of the
// file(s), but you are not obligated to do so. If you do not wish to do
// so, delete this exception statement from your version. If you delete
// this exception statement from all source files in the program, then
// also delete it here.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
/// Upgrades a version 3 schema to a version 4 schema.
use failure::Error;
pub fn run(_args: &super::Args, tx: &rusqlite::Transaction) -> Result<(), Error> {
// These create statements match the schema.sql when version 4 was the latest.
tx.execute_batch(r#"
create table signal (
id integer primary key,
source_uuid blob not null check (length(source_uuid) = 16),
type_uuid blob not null check (length(type_uuid) = 16),
short_name not null,
unique (source_uuid, type_uuid)
);
create table signal_type_enum (
type_uuid blob not null check (length(type_uuid) = 16),
value integer not null check (value > 0 and value < 16),
name text not null,
motion int not null check (motion in (0, 1)) default 0,
color text
);
create table signal_camera (
signal_id integer references signal (id),
camera_id integer references camera (id),
type integer not null,
primary key (signal_id, camera_id)
) without rowid;
create table signal_state (
time_90k integer primary key,
changes blob
);
"#)?;
Ok(())
}