switch hto monorepo structure

backend/internal/server/brightness/logind.go

@@ -0,0 +1,67 @@
+package brightness
+
+import (
+	"fmt"
+
+	"github.com/AvengeMedia/DankMaterialShell/backend/internal/log"
+	"github.com/godbus/dbus/v5"
+)
+
+type DBusConn interface {
+	Object(dest string, path dbus.ObjectPath) dbus.BusObject
+	Close() error
+}
+
+type LogindBackend struct {
+	conn     DBusConn
+	connOnce bool
+}
+
+func NewLogindBackend() (*LogindBackend, error) {
+	conn, err := dbus.ConnectSystemBus()
+	if err != nil {
+		return nil, fmt.Errorf("connect to system bus: %w", err)
+	}
+
+	obj := conn.Object("org.freedesktop.login1", "/org/freedesktop/login1/session/auto")
+	call := obj.Call("org.freedesktop.DBus.Peer.Ping", 0)
+	if call.Err != nil {
+		conn.Close()
+		return nil, fmt.Errorf("logind not available: %w", call.Err)
+	}
+
+	conn.Close()
+
+	return &LogindBackend{}, nil
+}
+
+func NewLogindBackendWithConn(conn DBusConn) *LogindBackend {
+	return &LogindBackend{
+		conn: conn,
+	}
+}
+
+func (b *LogindBackend) SetBrightness(subsystem, name string, brightness uint32) error {
+	if b.conn == nil {
+		conn, err := dbus.ConnectSystemBus()
+		if err != nil {
+			return fmt.Errorf("connect to system bus: %w", err)
+		}
+		b.conn = conn
+	}
+
+	obj := b.conn.Object("org.freedesktop.login1", "/org/freedesktop/login1/session/auto")
+	call := obj.Call("org.freedesktop.login1.Session.SetBrightness", 0, subsystem, name, brightness)
+	if call.Err != nil {
+		return fmt.Errorf("dbus call failed: %w", call.Err)
+	}
+
+	log.Debugf("logind: set %s/%s to %d", subsystem, name, brightness)
+	return nil
+}
+
+func (b *LogindBackend) Close() {
+	if b.conn != nil {
+		b.conn.Close()
+	}
+}