misc: small fix or general refactoring i did not bother commenting

modules/wlan.go

@@ -0,0 +1,68 @@
+package modules
+
+import (
+	"sync"
+	"time"
+
+	"github.com/evilsocket/bettercap-ng/network"
+	"github.com/evilsocket/bettercap-ng/session"
+)
+
+type WLan struct {
+	sync.Mutex
+	Session   *session.Session
+	Interface *network.Endpoint
+	Stations  map[string]*WirelessStation
+}
+
+func NewWLan(s *session.Session, iface *network.Endpoint) *WLan {
+	return &WLan{
+		Session:   s,
+		Interface: iface,
+		Stations:  make(map[string]*WirelessStation),
+	}
+}
+
+func (w *WLan) List() (list []*WirelessStation) {
+	w.Lock()
+	defer w.Unlock()
+
+	list = make([]*WirelessStation, 0)
+	for _, t := range w.Stations {
+		list = append(list, t)
+	}
+	return
+}
+
+func (w *WLan) Remove(mac string) {
+	w.Lock()
+	defer w.Unlock()
+
+	if station, found := w.Stations[mac]; found {
+		w.Session.Events.Add("wifi.station.lost", station)
+		delete(w.Stations, mac)
+	}
+}
+
+func (w *WLan) AddIfNew(ssid, mac string, isAp bool, channel int) *WirelessStation {
+	w.Lock()
+	defer w.Unlock()
+
+	mac = network.NormalizeMac(mac)
+	if station, found := w.Stations[mac]; found {
+		w.Stations[mac].LastSeen = time.Now()
+		return station
+	}
+
+	newStation := NewWirelessStation(ssid, mac, isAp, channel)
+	w.Stations[mac] = newStation
+
+	w.Session.Events.Add("wifi.station.new", newStation)
+
+	return nil
+}
+
+func (w *WLan) Clear() error {
+	w.Stations = make(map[string]*WirelessStation)
+	return nil
+}