feat(WIP): add pause and resume functionality for Portmaster/SPN

https://github.com/safing/portmaster/issues/2050

service/control/module.go

@@ -0,0 +1,74 @@
+package control
+
+import (
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/safing/portmaster/base/config"
+	"github.com/safing/portmaster/service/compat"
+	"github.com/safing/portmaster/service/firewall/interception"
+	"github.com/safing/portmaster/service/mgr"
+)
+
+var logPrefix = "control: "
+
+type Control struct {
+	mgr      *mgr.Manager
+	instance instance
+
+	locker         sync.Mutex
+	pauseWorker    *mgr.WorkerMgr
+	isPaused       bool
+	isPausedSPN    bool
+	pauseStartTime time.Time
+	pauseDuration  time.Duration
+}
+
+type instance interface {
+	Config() *config.Config
+	Interception() *interception.Interception
+	Compat() *compat.Compat
+	SPNGroup() *mgr.ExtendedGroup
+}
+
+var (
+	singleton atomic.Bool
+)
+
+func New(instance instance) (*Control, error) {
+	if !singleton.CompareAndSwap(false, true) {
+		return nil, fmt.Errorf("control: New failed: instance already created")
+	}
+
+	mgr := mgr.New("Control")
+	module := &Control{
+		mgr:      mgr,
+		instance: instance,
+	}
+	if err := module.prep(); err != nil {
+		return nil, err
+	}
+	return module, nil
+}
+
+func (c *Control) Manager() *mgr.Manager {
+	return c.mgr
+}
+
+func (c *Control) Start() error {
+	return nil
+}
+
+func (c *Control) Stop() error {
+	c.locker.Lock()
+	defer c.locker.Unlock()
+	c.stopResumeWorker()
+
+	return nil
+}
+
+func (c *Control) prep() error {
+	return c.registerAPIEndpoints()
+}