1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
import std / [options, times]
import tiny_sqlite
import uuids
import dbUtils
const migrations = [
"""
CREATE TABLE schema_version (
version INTEGER NOT NULL
);
CREATE TABLE url (
id INTEGER PRIMARY KEY,
token TEXT NOT NULL UNIQUE,
title TEXT NOT NULL,
url TEXT,
created DATE,
expires DATE
);
CREATE UNIQUE INDEX idx_url_token ON url(token);
"""
]
const latestVersion = migrations.len
proc Migrate*(db: DbConn): bool {.raises: [].} =
var currentVersion: int
try:
currentVersion = db.value("SELECT version FROM schema_version;").get().fromDbValue(int)
except SqliteError:
discard
if currentVersion != latestVersion:
try:
db.exec("BEGIN")
for v in currentVersion..<latestVersion:
db.execScript(migrations[v])
db.exec("DELETE FROM schema_version;")
db.exec("INSERT INTO schema_version (version) VALUES (?);", latestVersion)
db.exec("COMMIT;")
except:
let msg = getCurrentExceptionMsg()
echo msg
try:
db.exec("ROLLBACK")
except SqliteError:
discard
return false
return true
type ShortUrl* = object
ID*: int
Token*: UUID
Title*: string
Url*: string
Created*: DateTime
Expires*: DateTime
proc AddUrl*(db: DbConn, url: ShortUrl) {.raises: [SqliteError].} =
let stmt = db.stmt("""
INSERT INTO url(token, title, url, created, expires)
VALUES (?, ?, ?, ?, ?);
""")
stmt.exec($url.Token, url.Title, url.Url, url.Created, $url.Expires)
proc GetUrl*(db: DbConn, token: UUID): ref ShortUrl {.raises: [SqliteError].} =
let stmt = db.stmt("SELECT id, title, url, created, expires FROM url WHERE token = ?")
for row in stmt.iterate($token):
new(result)
result.ID = row[0].fromDbValue(int)
result.Token = token
result.Title = row[1].fromDbValue(string)
result.Url = row[2].fromDbValue(string)
result.Created = row[3].fromDbValue(DateTime)
result.Expires = row[4].fromDbValue(DateTime)
proc CleanExpired*(db: DbConn) {.raises: [].} =
try:
let stmt = db.stmt("DELETE FROM url WHERE expires < ?")
stmt.exec(times.now())
except:
discard
|
