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use chrono::{DateTime, Local};
use tokio_rusqlite::{params, Connection, Result};
use crate::model::{decode_datetime, encode_datetime, File};
pub async fn insert_file(conn: &Connection, file: File) -> Result<()> {
conn.call(move |conn| {
conn.execute(
r#"
INSERT INTO
files(id, created_at, expires_at, filename, content_length)
VALUES
(?1, datetime(), ?2, ?3, ?4)
"#,
params![
file.id,
encode_datetime(file.expires_at),
file.name,
file.content_length
],
)
.map_err(tokio_rusqlite::Error::Rusqlite)
})
.await
.map(|_| ())
}
pub async fn get_file(conn: &Connection, file_id: String) -> Result<Option<File>> {
conn.call(move |conn| {
let mut stmt = conn.prepare(
r#"
SELECT
filename, expires_at, content_length
FROM
files
WHERE
id = ?
AND expires_at > datetime()
"#,
)?;
let mut iter = stmt.query_map([file_id.clone()], |row| {
let res: (String, String, usize) = (row.get(0)?, row.get(1)?, row.get(2)?);
Ok(res)
})?;
match iter.next() {
Some(Ok((filename, expires_at, content_length))) => {
match decode_datetime(&expires_at) {
Some(expires_at) => Ok(Some(File {
id: file_id.clone(),
name: filename,
expires_at,
content_length,
})),
_ => Err(rusqlite_other_error(&format!(
"Error decoding datetime: {expires_at}"
))),
}
}
Some(_) => Err(rusqlite_other_error("Error reading file in DB")),
None => Ok(None),
}
})
.await
}
pub async fn list_expire_after(conn: &Connection, time: DateTime<Local>) -> Result<Vec<String>> {
conn.call(move |conn| {
let mut stmt = conn.prepare(
r#"
SELECT
id
FROM
files
WHERE
expires_at > ?
"#,
)?;
let iter = stmt.query_map([encode_datetime(time)], |row| row.get(0))?;
let mut res = vec![];
for id in iter {
res.push(id?)
}
Ok(res)
})
.await
}
pub async fn remove_expire_before(conn: &Connection, time: DateTime<Local>) -> Result<()> {
conn.call(move |conn| {
conn.execute(
&format!(
r#"
DELETE FROM
files
WHERE
expires_at <= ?
"#
),
[encode_datetime(time)]
)?;
Ok(())
})
.await
}
fn rusqlite_other_error(msg: &str) -> tokio_rusqlite::Error {
tokio_rusqlite::Error::Other(msg.into())
}
#[cfg(test)]
mod tests {
use super::*;
use crate::model::{generate_file_id, local_time};
use chrono::Duration;
use std::collections::HashSet;
use std::ops::Add;
#[tokio::test]
async fn test_insert_and_get_file() {
let conn = get_connection().await;
let file = dummy_file(Duration::minutes(1));
assert!(insert_file(&conn, file.clone()).await.is_ok());
let file_res = get_file(&conn, file.id.clone()).await;
assert!(file_res.is_ok());
assert_eq!(file_res.unwrap(), Some(file));
}
#[tokio::test]
async fn test_expired_file_err() {
let conn = get_connection().await;
let file = dummy_file(Duration::zero());
assert!(insert_file(&conn, file.clone()).await.is_ok());
let file_res = get_file(&conn, file.id.clone()).await;
assert!(file_res.is_ok());
assert!(file_res.unwrap().is_none());
}
#[tokio::test]
async fn test_wrong_file_err() {
let conn = get_connection().await;
let file = dummy_file(Duration::minutes(1));
assert!(insert_file(&conn, file.clone()).await.is_ok());
let file_res = get_file(&conn, "wrong-id".to_string()).await;
assert!(file_res.is_ok());
assert!(file_res.unwrap().is_none());
}
#[tokio::test]
async fn test_list_non_expirable() {
let conn = get_connection().await;
let file_expire = dummy_file(Duration::zero());
let file_no_expire_1 = dummy_file(Duration::minutes(1));
let file_no_expire_2 = dummy_file(Duration::minutes(1));
assert!(insert_file(&conn, file_expire.clone()).await.is_ok());
assert!(insert_file(&conn, file_no_expire_1.clone()).await.is_ok());
assert!(insert_file(&conn, file_no_expire_2.clone()).await.is_ok());
let list = list_expire_after(&conn, Local::now()).await;
assert!(list.is_ok());
assert_eq!(
HashSet::from_iter(list.unwrap().iter()),
HashSet::from([&file_no_expire_1.id, &file_no_expire_2.id])
)
}
#[tokio::test]
async fn test_remove_expire_before() {
let conn = get_connection().await;
let file_1 = dummy_file(Duration::zero());
let file_2 = dummy_file(Duration::zero());
let file_3 = dummy_file(Duration::minutes(1));
let file_4 = dummy_file(Duration::minutes(1));
assert!(insert_file(&conn, file_1.clone()).await.is_ok());
assert!(insert_file(&conn, file_2.clone()).await.is_ok());
assert!(insert_file(&conn, file_3.clone()).await.is_ok());
assert!(insert_file(&conn, file_4.clone()).await.is_ok());
assert!(remove_expire_before(&conn, Local::now()).await.is_ok());
assert!(get_file(&conn, file_1.id).await.unwrap().is_none());
assert!(get_file(&conn, file_2.id).await.unwrap().is_none());
assert!(get_file(&conn, file_3.id).await.unwrap().is_some());
assert!(get_file(&conn, file_4.id).await.unwrap().is_some());
}
fn dummy_file(td: Duration) -> File {
File {
id: generate_file_id(),
name: "foo".to_string(),
expires_at: local_time().add(td),
content_length: 100,
}
}
async fn get_connection() -> Connection {
let conn = Connection::open_in_memory().await.unwrap();
let init_db = tokio::fs::read_to_string("init-db.sql").await.unwrap();
let res = conn.call(move |conn| Ok(conn.execute(&init_db, []))).await;
assert!(res.is_ok());
conn
}
}
|
