From 2996dc875fc378ec3597bfa3bdb8ba8951e1865c Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Wed, 30 Aug 2023 14:28:48 +0200
Subject: lifecycle worker: implement main functionality

---
 src/model/s3/lifecycle_worker.rs | 102 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 97 insertions(+), 5 deletions(-)

(limited to 'src/model/s3/lifecycle_worker.rs')

diff --git a/src/model/s3/lifecycle_worker.rs b/src/model/s3/lifecycle_worker.rs
index 049fa2a3..069f44a0 100644
--- a/src/model/s3/lifecycle_worker.rs
+++ b/src/model/s3/lifecycle_worker.rs
@@ -6,6 +6,7 @@ use std::time::{Duration, Instant};
 use tokio::sync::watch;
 
 use garage_util::background::*;
+use garage_util::data::*;
 use garage_util::error::{Error, OkOrMessage};
 use garage_util::persister::PersisterShared;
 use garage_util::time::*;
@@ -165,6 +166,7 @@ impl Worker for LifecycleWorker {
 				let object = self.garage.object_table.data.decode_entry(&object_bytes)?;
 				process_object(
 					&self.garage,
+					*date,
 					object,
 					objects_expired,
 					mpu_aborted,
@@ -184,7 +186,7 @@ impl Worker for LifecycleWorker {
 		match &self.state {
 			State::Completed(d) => {
 				let now = now_msec();
-				let next_start = midnight_ts(d.succ());
+				let next_start = midnight_ts(d.succ_opt().expect("no next day"));
 				if now < next_start {
 					tokio::time::sleep_until(
 						(Instant::now() + Duration::from_millis(next_start - now)).into(),
@@ -208,6 +210,7 @@ impl Worker for LifecycleWorker {
 
 async fn process_object(
 	garage: &Arc<Garage>,
+	now_date: NaiveDate,
 	object: Object,
 	objects_expired: &mut usize,
 	mpu_aborted: &mut usize,
@@ -229,24 +232,113 @@ async fn process_object(
 		.unwrap_or_default();
 
 	for rule in lifecycle_policy.iter() {
-		todo!()
+		if let Some(pfx) = &rule.filter.prefix {
+			if !object.key.starts_with(pfx) {
+				continue;
+			}
+		}
+
+		if let Some(expire) = &rule.expiration {
+			if let Some(current_version) = object.versions().iter().rev().find(|v| v.is_data()) {
+				let version_date = next_date(current_version.timestamp);
+
+				let current_version_data = match &current_version.state {
+					ObjectVersionState::Complete(c) => c,
+					_ => unreachable!(),
+				};
+
+				let size_match = check_size_filter(current_version_data, &rule.filter);
+				let date_match = match expire {
+					LifecycleExpiration::AfterDays(n_days) => {
+						(now_date - version_date) >= chrono::Duration::days(*n_days as i64)
+					}
+					LifecycleExpiration::AtDate(exp_date) => now_date >= *exp_date,
+				};
+
+				if size_match && date_match {
+					// Delete expired version
+					let deleted_object = Object::new(
+						object.bucket_id,
+						object.key.clone(),
+						vec![ObjectVersion {
+							uuid: gen_uuid(),
+							timestamp: std::cmp::max(now_msec(), current_version.timestamp + 1),
+							state: ObjectVersionState::Complete(ObjectVersionData::DeleteMarker),
+						}],
+					);
+					garage.object_table.insert(&deleted_object).await?;
+					*objects_expired += 1;
+				}
+			}
+		}
+
+		if let Some(abort_mpu_days) = &rule.abort_incomplete_mpu_days {
+			let aborted_versions = object
+				.versions()
+				.iter()
+				.filter_map(|v| {
+					let version_date = next_date(v.timestamp);
+					match &v.state {
+						ObjectVersionState::Uploading { .. }
+							if (now_date - version_date)
+								>= chrono::Duration::days(*abort_mpu_days as i64) =>
+						{
+							Some(ObjectVersion {
+								state: ObjectVersionState::Aborted,
+								..*v
+							})
+						}
+						_ => None,
+					}
+				})
+				.collect::<Vec<_>>();
+			if !aborted_versions.is_empty() {
+				// Insert aborted mpu info
+				let n_aborted = aborted_versions.len();
+				let aborted_object =
+					Object::new(object.bucket_id, object.key.clone(), aborted_versions);
+				garage.object_table.insert(&aborted_object).await?;
+				*mpu_aborted += n_aborted;
+			}
+		}
 	}
 
 	*last_bucket = Some(bucket);
 	Ok(())
 }
 
+fn check_size_filter(version_data: &ObjectVersionData, filter: &LifecycleFilter) -> bool {
+	let size = match version_data {
+		ObjectVersionData::Inline(meta, _) | ObjectVersionData::FirstBlock(meta, _) => meta.size,
+		_ => unreachable!(),
+	};
+	if let Some(size_gt) = filter.size_gt {
+		if !(size > size_gt) {
+			return false;
+		}
+	}
+	if let Some(size_lt) = filter.size_lt {
+		if !(size < size_lt) {
+			return false;
+		}
+	}
+	return true;
+}
+
 fn midnight_ts(date: NaiveDate) -> u64 {
-	date.and_hms(0, 0, 0).timestamp_millis() as u64
+	date.and_hms_opt(0, 0, 0)
+		.expect("midnight does not exist")
+		.timestamp_millis() as u64
 }
 
 fn next_date(ts: u64) -> NaiveDate {
 	NaiveDateTime::from_timestamp_millis(ts as i64)
 		.expect("bad timestamp")
 		.date()
-		.succ()
+		.succ_opt()
+		.expect("no next day")
 }
 
 fn today() -> NaiveDate {
-	Utc::today().naive_utc()
+	Utc::now().naive_utc().date()
 }
-- 
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