kot.pink
1package db
2
3import (
4 "database/sql"
5
6 _ "github.com/mattn/go-sqlite3"
7)
8
9type DB struct {
10 *sql.DB
11}
12
13func Make(dbPath string) (*DB, error) {
14 db, err := sql.Open("sqlite3", dbPath)
15 if err != nil {
16 return nil, err
17 }
18
19 _, err = db.Exec(`
20 pragma journal_mode = WAL;
21 pragma synchronous = normal;
22 pragma foreign_keys = on;
23 pragma temp_store = memory;
24 pragma mmap_size = 30000000000;
25 pragma page_size = 32768;
26 pragma auto_vacuum = incremental;
27 pragma busy_timeout = 5000;
28
29 create table if not exists _jetstream (
30 id integer primary key autoincrement,
31 last_time_us integer not null
32 );
33
34 create table if not exists known_dids (
35 did text primary key
36 );
37
38 -- status event for a single workflow
39 create table if not exists events (
40 rkey text not null,
41 nsid text not null,
42 event text not null, -- json
43 created integer not null -- unix nanos
44 );
45 `)
46 if err != nil {
47 return nil, err
48 }
49
50 return &DB{db}, nil
51}
52
53func (d *DB) SaveLastTimeUs(lastTimeUs int64) error {
54 _, err := d.Exec(`
55 insert into _jetstream (id, last_time_us)
56 values (1, ?)
57 on conflict(id) do update set last_time_us = excluded.last_time_us
58 `, lastTimeUs)
59 return err
60}
61
62func (d *DB) GetLastTimeUs() (int64, error) {
63 var lastTimeUs int64
64 row := d.QueryRow(`select last_time_us from _jetstream where id = 1;`)
65 err := row.Scan(&lastTimeUs)
66 return lastTimeUs, err
67}