add EthernetDisconnect trigger

triggers/ethernet.go

@@ -0,0 +1,102 @@
+package triggers
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"time"
+
+	"unknown.com/gokill/actions"
+	"unknown.com/gokill/internal"
+)
+
+type EthernetDisconnect struct {
+	WaitTillConnected bool   `json:"waitTillConnected"`
+	InterfaceName     string `json:"interfaceName"`
+	action            actions.Action
+}
+
+func isEthernetConnected(deviceName string) bool {
+	content, err := ioutil.ReadFile(fmt.Sprintf("/sys/class/net/%s/operstate", deviceName))
+
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+
+	if string(content[:4]) == "down" {
+		fmt.Println("Ethernet is disconnected")
+		return false
+	}
+
+	return true
+}
+
+func (t EthernetDisconnect) Listen() {
+	fmt.Println("EthernetDisconnect listens")
+
+	if t.WaitTillConnected {
+		for !isEthernetConnected("enp0s31f6") {
+			time.Sleep(1 * time.Second)
+		}
+	}
+
+	for {
+		if !isEthernetConnected("enp0s31f6") {
+			fmt.Println("Ethernet is disconnected")
+			break
+		}
+
+		time.Sleep(1 * time.Second)
+	}
+
+	fmt.Println("EthernetDisconnect fires")
+	t.action.Execute()
+}
+
+// func NewTimeOut(d time.Duration, action actions.Action) EthernetDisconnect {
+func NewEthernetDisconnect(config internal.KillSwitchConfig) (EthernetDisconnect, error) {
+	result := EthernetDisconnect{
+		WaitTillConnected: true,
+	}
+
+	fmt.Println(string(config.Options))
+	err := json.Unmarshal(config.Options, &result)
+
+	fmt.Println(result)
+
+	if err != nil {
+		return EthernetDisconnect{}, err
+	}
+
+	fmt.Println(result.InterfaceName)
+
+	if result.InterfaceName == "" {
+		return EthernetDisconnect{}, internal.OptionMissingError{"interfaceName"}
+	}
+
+	action, err := actions.NewAction(config.Actions)
+
+	if err != nil {
+		return EthernetDisconnect{}, err
+	}
+
+	result.action = action
+
+	return result, nil
+}
+
+func (p EthernetDisconnect) GetName() string {
+	return "EthernetDisconnect"
+}
+
+func (p EthernetDisconnect) GetDescription() string {
+	return "Triggers if Ethernetcable is disconnected."
+}
+
+func (p EthernetDisconnect) GetOptions() []internal.ConfigOption {
+	return []internal.ConfigOption{
+		{"waitTillConnected", "bool", "Only trigger when device was connected before", "true"},
+		{"interfaceName", "string", "Name of ethernet adapter", "\"\""},
+	}
+}