Add automatic DB index refresh to crawl-rss

Since this is the only service that runs a simple timer, I decided
to add it there.

crawl-rss/main.go

@@ -27,10 +27,16 @@ func main() {
 		for _, torrent := range torrents {
 			addTorrent(db, torrent, &crawled)
 		}
-		time.Sleep(time.Minute * 30)
+		time.Sleep(time.Minute * 45)
+		go refresh(db)
 	}
 }
 
+func refresh(db *sql.DB) {
+	db.Exec("REFRESH MATERIALIZED VIEW fresh")
+	db.Exec("REFRESH MATERIALIZED VIEW CONCURRENTLY search")
+}
+
 func addTorrent(db *sql.DB, torr Torrent, crawled *map[string]bool) {
 	if !(*crawled)[string(torr.Infohash)] {
 		_, err := db.Exec("INSERT INTO torrent (infohash, name, length) VALUES ($1, $2, $3)", torr.Infohash, torr.Name, torr.Length)