some cleanup

app/db.go

@@ -48,8 +48,10 @@ func (d *db) IsNewFeed() bool {
 
 func NewDB(storageDir, feedName string) (DB, error) {
 	dbPath := path.Join(storageDir, fmt.Sprintf("%s.csv", feedName))
-	db := db{dbPath: dbPath}
-	db.seenLinks = map[string]struct{}{}
+	db := db{
+		dbPath:    dbPath,
+		seenLinks: map[string]struct{}{},
+	}
 	f, err := os.Open(dbPath)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {

limiter/limiter.go

@@ -11,22 +11,18 @@ type Limiter interface {
 
 type limiter struct {
 	tick    time.Duration
-	count   uint
+	count   int
 	entries []time.Time
-	index   uint
+	index   int
 	mutex   sync.Mutex
 }
 
-func NewLimiter(tick time.Duration, count uint) Limiter {
+func NewLimiter(tick time.Duration, count int) Limiter {
 	l := limiter{
-		tick:  tick,
-		count: count,
-		index: 0,
-	}
-	l.entries = make([]time.Time, count)
-	before := time.Now().Add(-2 * tick)
-	for i, _ := range l.entries {
-		l.entries[i] = before
+		tick:    tick,
+		count:   count,
+		entries: make([]time.Time, count),
+		index:   0,
 	}
 	return &l
 }