🎉 Implement working Audio Mixer backend with Jack support

config.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"embed"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/pelletier/go-toml/v2"
+)
+
+const CONFIG_DIR = "./data"
+
+//go:embed sample_configs/*
+var sampleConfig embed.FS
+
+type Config struct {
+	Web struct {
+		Bind string `toml:"bind"`
+		Port int    `toml:"port"`
+	} `toml:"web"`
+	Jack struct {
+		Enabled    bool   `toml:"enabled"`
+		ClientName string `toml:"client_name"`
+	} `toml:"jack"`
+}
+
+var config Config
+
+// Copy default config if `{name}.toml` file does not exist
+func createDefaultConfig(name string) {
+	dest_path := fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name)
+	source_path := fmt.Sprintf("sample_configs/%s.toml", name)
+
+	if _, err := os.Stat(dest_path); errors.Is(err, os.ErrNotExist) {
+		content, err := sampleConfig.ReadFile(source_path)
+		if err != nil {
+			fmt.Printf("Warning! Default config for `%s` does not exist!\n", name)
+			return
+		}
+		os.WriteFile(dest_path, content, 0644)
+	}
+}
+
+// Load config from `.toml` file into a struct
+func loadConfig(name string, dest interface{}) {
+	createDefaultConfig(name)
+
+	file, err := os.ReadFile(fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name))
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	err = toml.Unmarshal(file, dest)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+// Save struct as a `.toml` file
+func saveConfig(name string, dest interface{}) {
+	bin, err := toml.Marshal(dest)
+	if err != nil {
+		fmt.Println(err)
+	}
+	err = os.WriteFile(fmt.Sprintf("%s/%s.toml", CONFIG_DIR, name), bin, 0644)
+	if err != nil {
+		fmt.Println(err)
+	}
+}