Initial Push

internal/config/config.go

@@ -0,0 +1,53 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+// KeyConfig defines what a single Stream Deck key does.
+type KeyConfig struct {
+	Icon    string `yaml:"icon"`    // filename relative to icons_dir
+	Command string `yaml:"command"` // shell command to run on press
+}
+
+// Config is the top-level structure of the YAML config file.
+type Config struct {
+	IconsDir   string            `yaml:"icons_dir"`
+	Brightness int               `yaml:"brightness"`
+	Device     DeviceConfig      `yaml:"device"`
+	Keys       map[int]KeyConfig `yaml:"keys"`
+}
+
+// DeviceConfig allows overriding USB IDs (defaults work for Stream Deck XL v2).
+type DeviceConfig struct {
+	VendorID  uint16 `yaml:"vendor_id"`
+	ProductID uint16 `yaml:"product_id"`
+}
+
+// Load reads and parses a YAML config file, applying sane defaults.
+// icons_dir defaults to an "icons" folder next to the config file.
+func Load(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read config %q: %w", path, err)
+	}
+
+	cfg := &Config{
+		IconsDir:   filepath.Join(filepath.Dir(path), "icons"),
+		Brightness: 70,
+		Device: DeviceConfig{
+			VendorID:  0x0fd9,
+			ProductID: 0x00ba, // Stream Deck XL v2
+		},
+	}
+
+	if err := yaml.Unmarshal(data, cfg); err != nil {
+		return nil, fmt.Errorf("parse config: %w", err)
+	}
+
+	return cfg, nil
+}