init

Signed-off-by: Hadi <[email protected]>

internal/bluetooth/bluetoothctl.go

@@ -0,0 +1,71 @@
+// Package bluetooth wraps bluetoothctl to read and control Bluetooth state
+// (controller power, device pairing/connection). Every exported function
+// shells out to bluetoothctl in its non-interactive single-command mode;
+// there is no direct D-Bus/BlueZ integration.
+package bluetooth
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/charmbracelet/x/ansi"
+)
+
+var (
+	ErrNotFound     = errors.New("bluetoothctl not found in PATH")
+	ErrNoController = errors.New("no Bluetooth controller found")
+)
+
+const defaultTimeout = 15 * time.Second
+
+// CheckAvailable reports whether bluetoothctl is installed and a Bluetooth
+// controller is reachable. Call it before using the rest of the package.
+func CheckAvailable() error {
+	if _, err := exec.LookPath("bluetoothctl"); err != nil {
+		return ErrNotFound
+	}
+	out, err := run(defaultTimeout, "list")
+	if err != nil {
+		return fmt.Errorf("%w: %v", ErrNoController, err)
+	}
+	if strings.TrimSpace(out) == "" {
+		return ErrNoController
+	}
+	return nil
+}
+
+// run executes bluetoothctl in single-command (non-interactive) mode.
+// bluetoothctl writes both normal output and error messages to stdout
+// (colored with ANSI escapes), so errors are extracted from there rather
+// than stderr.
+func run(timeout time.Duration, args ...string) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, "bluetoothctl", args...) // #nosec G204 -- args are fixed bluetoothctl subcommands or user-supplied device addresses, never shell-interpreted
+	var stdout, stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	out := ansi.Strip(stdout.String())
+	if err != nil {
+		if errors.Is(err, exec.ErrNotFound) {
+			return "", ErrNotFound
+		}
+		msg := strings.TrimSpace(out)
+		if msg == "" {
+			msg = strings.TrimSpace(stderr.String())
+		}
+		if msg == "" {
+			msg = err.Error()
+		}
+		return "", fmt.Errorf("bluetoothctl %s: %s", strings.Join(args, " "), msg)
+	}
+	return out, nil
+}