lemmy/src/scheduled_tasks.rs

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use clokwerk::{Scheduler, TimeUnits as CTimeUnits};
use diesel::{
dsl::{now, IntervalDsl},
Connection,
ExpressionMethods,
NullableExpressionMethods,
QueryDsl,
};
// Import week days and WeekDay
use diesel::{sql_query, PgConnection, RunQueryDsl};
use lemmy_api_common::context::LemmyContext;
use lemmy_db_schema::{
schema::{
activity,
comment,
comment_aggregates,
community_aggregates,
community_person_ban,
instance,
person,
post,
post_aggregates,
},
source::instance::{Instance, InstanceForm},
utils::{functions::hot_rank, naive_now, DELETED_REPLACEMENT_TEXT},
};
use lemmy_routes::nodeinfo::NodeInfo;
use lemmy_utils::{error::LemmyError, REQWEST_TIMEOUT};
use reqwest::blocking::Client;
use std::{thread, time::Duration};
use tracing::{error, info};
/// Schedules various cleanup tasks for lemmy in a background thread
pub fn setup(
db_url: String,
user_agent: String,
context_1: LemmyContext,
) -> Result<(), LemmyError> {
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// Setup the connections
let mut scheduler = Scheduler::new();
startup_jobs(&db_url);
// Update active counts every hour
let url = db_url.clone();
scheduler.every(CTimeUnits::hour(1)).run(move || {
let mut conn = PgConnection::establish(&url).expect("could not establish connection");
active_counts(&mut conn);
update_banned_when_expired(&mut conn);
});
// Update hot ranks every 5 minutes
let url = db_url.clone();
scheduler.every(CTimeUnits::minutes(5)).run(move || {
let mut conn = PgConnection::establish(&url).expect("could not establish connection");
update_hot_ranks(&mut conn, true);
});
// Clear old activities every week
let url = db_url.clone();
scheduler.every(CTimeUnits::weeks(1)).run(move || {
let mut conn = PgConnection::establish(&url).expect("could not establish connection");
clear_old_activities(&mut conn);
});
// Remove old rate limit buckets after 1 to 2 hours of inactivity
scheduler.every(CTimeUnits::hour(1)).run(move || {
let hour = Duration::from_secs(3600);
context_1.settings_updated_channel().remove_older_than(hour);
});
// Overwrite deleted & removed posts and comments every day
let url = db_url.clone();
scheduler.every(CTimeUnits::days(1)).run(move || {
let mut conn = PgConnection::establish(&url).expect("could not establish connection");
overwrite_deleted_posts_and_comments(&mut conn);
});
// Update the Instance Software
scheduler.every(CTimeUnits::days(1)).run(move || {
let mut conn = PgConnection::establish(&db_url).expect("could not establish connection");
update_instance_software(&mut conn, &user_agent);
});
// Manually run the scheduler in an event loop
loop {
scheduler.run_pending();
thread::sleep(Duration::from_millis(1000));
}
}
/// Run these on server startup
fn startup_jobs(db_url: &str) {
let mut conn = PgConnection::establish(db_url).expect("could not establish connection");
active_counts(&mut conn);
update_hot_ranks(&mut conn, false);
update_banned_when_expired(&mut conn);
clear_old_activities(&mut conn);
overwrite_deleted_posts_and_comments(&mut conn);
}
/// Update the hot_rank columns for the aggregates tables
fn update_hot_ranks(conn: &mut PgConnection, last_week_only: bool) {
let mut post_update = diesel::update(post_aggregates::table).into_boxed();
let mut comment_update = diesel::update(comment_aggregates::table).into_boxed();
let mut community_update = diesel::update(community_aggregates::table).into_boxed();
// Only update for the last week of content
if last_week_only {
info!("Updating hot ranks for last week...");
let last_week = now - diesel::dsl::IntervalDsl::weeks(1);
post_update = post_update.filter(post_aggregates::published.gt(last_week));
comment_update = comment_update.filter(comment_aggregates::published.gt(last_week));
community_update = community_update.filter(community_aggregates::published.gt(last_week));
} else {
info!("Updating hot ranks for all history...");
}
match post_update
.set((
post_aggregates::hot_rank.eq(hot_rank(post_aggregates::score, post_aggregates::published)),
post_aggregates::hot_rank_active.eq(hot_rank(
post_aggregates::score,
post_aggregates::newest_comment_time_necro,
)),
))
.execute(conn)
{
Ok(_) => {}
Err(e) => {
error!("Failed to update post_aggregates hot_ranks: {}", e)
}
}
match comment_update
.set(comment_aggregates::hot_rank.eq(hot_rank(
comment_aggregates::score,
comment_aggregates::published,
)))
.execute(conn)
{
Ok(_) => {}
Err(e) => {
error!("Failed to update comment_aggregates hot_ranks: {}", e)
}
}
match community_update
.set(community_aggregates::hot_rank.eq(hot_rank(
community_aggregates::subscribers,
community_aggregates::published,
)))
.execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
error!("Failed to update community_aggregates hot_ranks: {}", e)
}
}
}
/// Clear old activities (this table gets very large)
fn clear_old_activities(conn: &mut PgConnection) {
info!("Clearing old activities...");
match diesel::delete(activity::table.filter(activity::published.lt(now - 6.months())))
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.execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
error!("Failed to clear old activities: {}", e)
}
}
}
/// overwrite posts and comments 30d after deletion
fn overwrite_deleted_posts_and_comments(conn: &mut PgConnection) {
info!("Overwriting deleted posts...");
match diesel::update(
post::table
.filter(post::deleted.eq(true))
.filter(post::updated.lt(now.nullable() - 1.months()))
.filter(post::body.ne(DELETED_REPLACEMENT_TEXT)),
)
.set((
post::body.eq(DELETED_REPLACEMENT_TEXT),
post::name.eq(DELETED_REPLACEMENT_TEXT),
))
.execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
error!("Failed to overwrite deleted posts: {}", e)
}
}
info!("Overwriting deleted comments...");
match diesel::update(
comment::table
.filter(comment::deleted.eq(true))
.filter(comment::updated.lt(now.nullable() - 1.months()))
.filter(comment::content.ne(DELETED_REPLACEMENT_TEXT)),
)
.set(comment::content.eq(DELETED_REPLACEMENT_TEXT))
.execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
error!("Failed to overwrite deleted comments: {}", e)
}
}
}
/// Re-calculate the site and community active counts every 12 hours
fn active_counts(conn: &mut PgConnection) {
info!("Updating active site and community aggregates ...");
let intervals = vec![
("1 day", "day"),
("1 week", "week"),
("1 month", "month"),
("6 months", "half_year"),
];
for i in &intervals {
let update_site_stmt = format!(
"update site_aggregates set users_active_{} = (select * from site_aggregates_activity('{}'))",
i.1, i.0
);
match sql_query(update_site_stmt).execute(conn) {
Ok(_) => {}
Err(e) => {
error!("Failed to update site stats: {}", e)
}
}
let update_community_stmt = format!("update community_aggregates ca set users_active_{} = mv.count_ from community_aggregates_activity('{}') mv where ca.community_id = mv.community_id_", i.1, i.0);
match sql_query(update_community_stmt).execute(conn) {
Ok(_) => {}
Err(e) => {
error!("Failed to update community stats: {}", e)
}
}
}
info!("Done.");
}
/// Set banned to false after ban expires
fn update_banned_when_expired(conn: &mut PgConnection) {
info!("Updating banned column if it expires ...");
match diesel::update(
person::table
.filter(person::banned.eq(true))
.filter(person::ban_expires.lt(now)),
)
.set(person::banned.eq(false))
.execute(conn)
{
Ok(_) => {}
Err(e) => {
error!("Failed to update person.banned when expires: {}", e)
}
}
match diesel::delete(community_person_ban::table.filter(community_person_ban::expires.lt(now)))
.execute(conn)
{
Ok(_) => {}
Err(e) => {
error!("Failed to remove community_ban expired rows: {}", e)
}
}
}
/// Updates the instance software and version
fn update_instance_software(conn: &mut PgConnection, user_agent: &str) {
info!("Updating instances software and versions...");
let client = match Client::builder()
.user_agent(user_agent)
.timeout(REQWEST_TIMEOUT)
.build()
{
Ok(client) => client,
Err(e) => {
error!("Failed to build reqwest client: {}", e);
return;
}
};
let instances = match instance::table.get_results::<Instance>(conn) {
Ok(instances) => instances,
Err(e) => {
error!("Failed to get instances: {}", e);
return;
}
};
for instance in instances {
let node_info_url = format!("https://{}/nodeinfo/2.0.json", instance.domain);
// Skip it if it can't connect
let res = client
.get(&node_info_url)
.send()
.ok()
.and_then(|t| t.json::<NodeInfo>().ok());
if let Some(node_info) = res {
let software = node_info.software.as_ref();
let form = InstanceForm::builder()
.domain(instance.domain)
.software(software.and_then(|s| s.name.clone()))
.version(software.and_then(|s| s.version.clone()))
.updated(Some(naive_now()))
.build();
match diesel::update(instance::table.find(instance.id))
.set(form)
.execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
error!("Failed to update site instance software: {}", e);
return;
}
}
}
}
}
#[cfg(test)]
mod tests {
use lemmy_routes::nodeinfo::NodeInfo;
use reqwest::Client;
#[tokio::test]
#[ignore]
async fn test_nodeinfo() {
let client = Client::builder().build().unwrap();
let lemmy_ml_nodeinfo = client
.get("https://lemmy.ml/nodeinfo/2.0.json")
.send()
.await
.unwrap()
.json::<NodeInfo>()
.await
.unwrap();
assert_eq!(lemmy_ml_nodeinfo.software.unwrap().name.unwrap(), "lemmy");
}
}