init

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

internal/config/config.go

@@ -0,0 +1,70 @@
+package config
+
+import (
+	_ "embed"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/spf13/viper"
+	"gopkg.in/yaml.v3"
+)
+
+//go:embed default_config.yaml
+var defaultConfig []byte
+
+type Config struct {
+	Keybindings Keybindings `mapstructure:"keybindings"`
+}
+
+var Global *Config
+
+func Load(path string) error {
+	var defaults map[string]any
+	if err := yaml.Unmarshal(defaultConfig, &defaults); err != nil {
+		return fmt.Errorf("default config: %w", err)
+	}
+	for k, v := range flatten("", defaults) {
+		viper.SetDefault(k, v)
+	}
+
+	viper.SetConfigType("yaml")
+	viper.SetConfigFile(path)
+	if err := viper.ReadInConfig(); err != nil {
+		if !errors.Is(err, os.ErrNotExist) {
+			return err
+		}
+	}
+
+	Global = &Config{}
+	return viper.Unmarshal(Global)
+}
+
+func WriteDefaultConfig(path string) error {
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		return fmt.Errorf("create config dir: %w", err)
+	}
+	if err := os.WriteFile(path, defaultConfig, 0o600); err != nil {
+		return fmt.Errorf("write config: %w", err)
+	}
+	return nil
+}
+
+func flatten(prefix string, m map[string]any) map[string]any {
+	out := make(map[string]any)
+	for k, v := range m {
+		key := k
+		if prefix != "" {
+			key = prefix + "." + k
+		}
+		if nested, ok := v.(map[string]any); ok {
+			for nk, nv := range flatten(key, nested) {
+				out[nk] = nv
+			}
+		} else {
+			out[key] = v
+		}
+	}
+	return out
+}