api: add cron job to clean up views table

api/cron_views_cleanup.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"time"
+)
+
+func viewsCleanupBegin() error {
+	go func() {
+		for {
+			statement := `
+				DELETE FROM views
+				WHERE viewDate < $1;
+			`
+			_, err := db.Exec(statement, time.Now().UTC().AddDate(0, 0, -45))
+			if err != nil {
+				logger.Errorf("error cleaning up views: %v", err)
+				return
+			}
+
+			time.Sleep(24 * time.Hour)
+		}
+	}()
+
+	return nil
+}