feat: implement confirmer

pkg/confirmer/confirmer.go

@@ -0,0 +1,44 @@
+package confirmer
+
+import (
+	"errors"
+	"sync"
+	"time"
+)
+
+type Confirmer struct {
+	requests map[string]*Request
+	locker   sync.Locker
+}
+
+func New() *Confirmer {
+	return &Confirmer{
+		requests: make(map[string]*Request),
+		locker:   &sync.Mutex{},
+	}
+}
+
+func (c *Confirmer) NewRequest(timeout time.Duration) *Request {
+	c.locker.Lock()
+	defer c.locker.Unlock()
+
+	req := newRequest(timeout)
+
+	c.requests[req.ID()] = req
+
+	return req
+}
+
+func (c *Confirmer) SetResponse(uuid string, value bool) error {
+	c.locker.Lock()
+	defer c.locker.Unlock()
+
+	req, ok := c.requests[uuid]
+	if !ok {
+		return errors.New("no such request")
+	}
+
+	req.value <- value
+
+	return nil
+}