initial commit

controller/openrgb/client.go

@@ -0,0 +1,49 @@
+package openrgb
+
+import (
+	"fmt"
+	"os/exec"
+)
+
+// Client controls RGB devices via the openrgb CLI.
+type Client struct {
+	bin string
+}
+
+func Connect() (*Client, error) {
+	bin, err := exec.LookPath("openrgb")
+	if err != nil {
+		return nil, fmt.Errorf("openrgb not found in PATH: %w", err)
+	}
+
+	// Verify openrgb can list devices (confirms it's running/accessible)
+	cmd := exec.Command(bin, "--list-devices")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return nil, fmt.Errorf("openrgb list-devices failed: %w\n%s", err, out)
+	}
+
+	return &Client{bin: bin}, nil
+}
+
+func (c *Client) Close() error {
+	return nil
+}
+
+// SetAllOff sets all devices to black (off) using direct mode.
+func (c *Client) SetAllOff() error {
+	cmd := exec.Command(c.bin, "--mode", "direct", "--color", "000000")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("openrgb set off: %w\n%s", err, out)
+	}
+	return nil
+}
+
+// SetAllOn sets all devices to the given color.
+func (c *Client) SetAllOn(r, g, b byte) error {
+	color := fmt.Sprintf("%02X%02X%02X", r, g, b)
+	cmd := exec.Command(c.bin, "--mode", "direct", "--color", color)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("openrgb set on: %w\n%s", err, out)
+	}
+	return nil
+}