Refactor platform command api

experimental/libbox/command_client.go

@@ -0,0 +1,69 @@
+//go:build darwin
+
+package libbox
+
+import (
+	"encoding/binary"
+	"net"
+	"path/filepath"
+
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+type CommandClient struct {
+	sockPath string
+	handler  CommandClientHandler
+	conn     net.Conn
+	options  CommandClientOptions
+}
+
+type CommandClientOptions struct {
+	Command        int32
+	StatusInterval int64
+}
+
+type CommandClientHandler interface {
+	Connected()
+	Disconnected(message string)
+	WriteLog(message string)
+	WriteStatus(message *StatusMessage)
+}
+
+func NewCommandClient(sharedDirectory string, handler CommandClientHandler, options *CommandClientOptions) *CommandClient {
+	return &CommandClient{
+		sockPath: filepath.Join(sharedDirectory, "command.sock"),
+		handler:  handler,
+		options:  common.PtrValueOrDefault(options),
+	}
+}
+
+func (c *CommandClient) Connect() error {
+	conn, err := net.DialUnix("unix", nil, &net.UnixAddr{
+		Name: c.sockPath,
+		Net:  "unix",
+	})
+	if err != nil {
+		return err
+	}
+	c.conn = conn
+	err = binary.Write(conn, binary.BigEndian, uint8(c.options.Command))
+	if err != nil {
+		return err
+	}
+	switch c.options.Command {
+	case CommandLog:
+		go c.handleLogConn(conn)
+	case CommandStatus:
+		err = binary.Write(conn, binary.BigEndian, c.options.StatusInterval)
+		if err != nil {
+			return E.Cause(err, "write interval")
+		}
+		go c.handleStatusConn(conn)
+	}
+	return nil
+}
+
+func (c *CommandClient) Disconnect() error {
+	return common.Close(c.conn)
+}