Clean up network/* packages, revamp online status detection

network/environment/main.go

@@ -0,0 +1,42 @@
+package environment
+
+import (
+	"errors"
+
+	"github.com/safing/portbase/modules"
+)
+
+const (
+	networkChangedEvent      = "network changed"
+	onlineStatusChangedEvent = "online status changed"
+)
+
+var (
+	module *modules.Module
+)
+
+func InitSubModule(m *modules.Module) {
+	module = m
+	module.RegisterEvent(networkChangedEvent)
+	module.RegisterEvent(onlineStatusChangedEvent)
+}
+
+func StartSubModule() error {
+	if module == nil {
+		return errors.New("not initialized")
+	}
+
+	module.StartServiceWorker(
+		"monitor network changes",
+		0,
+		monitorNetworkChanges,
+	)
+
+	module.StartServiceWorker(
+		"monitor online status",
+		0,
+		monitorOnlineStatus,
+	)
+
+	return nil
+}