Refactorings for simplify readability (#35)

internal/controller/proxy/proxy.go

@@ -0,0 +1,49 @@
+package proxy
+
+import (
+	"context"
+	"errors"
+	"github.com/cirruslabs/orchard/internal/concurrentmap"
+	"net"
+)
+
+var ErrInvalidToken = errors.New("invalid proxy token")
+
+type Proxy struct {
+	sessions *concurrentmap.ConcurrentMap[*TokenSlot]
+}
+
+type TokenSlot struct {
+	ctx context.Context
+	ch  chan net.Conn
+}
+
+func NewProxy() *Proxy {
+	return &Proxy{
+		sessions: concurrentmap.NewConcurrentMap[*TokenSlot](),
+	}
+}
+
+func (proxy *Proxy) Request(ctx context.Context, session string) (chan net.Conn, func()) {
+	tokenSlot := &TokenSlot{
+		ctx: ctx,
+		ch:  make(chan net.Conn),
+	}
+
+	proxy.sessions.Store(session, tokenSlot)
+
+	return tokenSlot.ch, func() {
+		proxy.sessions.Delete(session)
+	}
+}
+
+func (proxy *Proxy) Respond(session string, conn net.Conn) (context.Context, error) {
+	tokenSlot, ok := proxy.sessions.Load(session)
+	if !ok {
+		return nil, ErrInvalidToken
+	}
+
+	tokenSlot.ch <- conn
+
+	return tokenSlot.ctx, nil
+}