/
gateway.go
94 lines (71 loc) · 1.72 KB
/
gateway.go
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package basicstation
import (
"errors"
"sync"
"time"
"github.com/gorilla/websocket"
"github.com/ThingsIXFoundation/packet-handling/external/chirpstack/gateway-bridge/backend/events"
"github.com/ThingsIXFoundation/packet-handling/external/chirpstack/gateway-bridge/backend/stats"
"github.com/brocaar/lorawan"
)
var (
errGatewayDoesNotExist = errors.New("gateway does not exist")
)
type connection struct {
sync.Mutex
conn *websocket.Conn
stats *stats.Collector
lastTimesync time.Time
}
type gateways struct {
sync.RWMutex
gateways map[lorawan.EUI64]*connection
subscribeEventFunc func(events.Subscribe)
}
func (g *gateways) get(id lorawan.EUI64) (*connection, error) {
g.RLock()
defer g.RUnlock()
gw, ok := g.gateways[id]
if !ok {
return gw, errGatewayDoesNotExist
}
return gw, nil
}
func (g *gateways) set(id lorawan.EUI64, c *connection) error {
g.Lock()
defer g.Unlock()
g.gateways[id] = c
if g.subscribeEventFunc != nil {
g.subscribeEventFunc(events.Subscribe{Subscribe: true, GatewayID: id})
}
return nil
}
func (g *gateways) getLastTimesync(id lorawan.EUI64) (time.Time, error) {
g.RLock()
defer g.RUnlock()
gw, ok := g.gateways[id]
if !ok {
return time.Time{}, errGatewayDoesNotExist
}
return gw.lastTimesync, nil
}
func (g *gateways) setLastTimesync(id lorawan.EUI64, ts time.Time) error {
g.Lock()
defer g.Unlock()
gw, ok := g.gateways[id]
if !ok {
return errGatewayDoesNotExist
}
gw.lastTimesync = ts
g.gateways[id] = gw
return nil
}
func (g *gateways) remove(id lorawan.EUI64) error {
g.Lock()
defer g.Unlock()
if g.subscribeEventFunc != nil {
g.subscribeEventFunc(events.Subscribe{Subscribe: false, GatewayID: id})
}
delete(g.gateways, id)
return nil
}