Add lastUpdated to sources

core/source.go

@@ -12,8 +12,8 @@ import (
 
 func AddSource(db DB, name string) error {
 	_, err := db.Exec(`
-		insert into sources (name)
-		values (?)
+		insert into sources (name, lastUpdated)
+		values (?, 0)
 	`, name)
 
 	return err
@@ -70,6 +70,22 @@ func SetState(db DB, source string, state []byte) error {
 	return err
 }
 
+func GetLastUpdated(db DB, source string) (time.Time, error) {
+	row := db.QueryRow("select lastUpdated from sources where name = ?", source)
+	var updated int
+	err := row.Scan(&updated)
+	return time.Unix(int64(updated), 0).UTC(), err
+}
+
+func BumpLastUpdated(db DB, source string, now time.Time) error {
+	_, err := db.Exec(`
+		update sources
+		set lastUpdated = ?
+		where name = ?
+	`, now.Unix(), source)
+	return err
+}
+
 func getSourceTtx(db DB, source string, env string) (int, error) {
 	row := db.QueryRow(`
 		select value
@@ -268,5 +284,9 @@ func updateWithFetchedItemsTx(
 		return 0, 0, err
 	}
 
+	if err = BumpLastUpdated(db, source, now); err != nil {
+		return 0, 0, err
+	}
+
 	return len(newItems), len(idsToDelete), nil
 }

core/source_test.go

@@ -322,3 +322,31 @@ func TestSourceTtx(t *testing.T) {
 		t.Fatalf("Missing value after postProcess: ttl = %d, ttd = %d, tts = %d", after.Ttl, after.Ttd, after.Tts)
 	}
 }
+
+func TestSourceLastUpdated(t *testing.T) {
+	db := EphemeralDb(t)
+	if err := AddSource(db, "s"); err != nil {
+		t.Fatal(err)
+	}
+	updated, err := GetLastUpdated(db, "s")
+	if err != nil {
+		t.Fatalf("failed to get lastUpdated: %v", err)
+	}
+	if updated != time.Unix(0, 0).UTC() {
+		t.Fatalf("expected epoch time, got %v", updated)
+	}
+
+	now := time.Now().UTC().Round(time.Second)
+	_, _, err = UpdateWithFetchedItems(db, "s", nil, nil, now)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	updated, err = GetLastUpdated(db, "s")
+	if err != nil {
+		t.Fatalf("failed to get lastUpdated: %v", err)
+	}
+	if updated != now {
+		t.Fatalf("incorrect last updated time\nnow: %v\ngot: %v", now, updated)
+	}
+}

core/sql/0001_initial_schema.sql

@@ -1,6 +1,7 @@
 create table sources(
     name text not null,
     state blob,
+    lastUpdated int not null,
     primary key (name)
 ) strict;
 create table actions(