tidying up a *lot*; add QoL options

config/config.go

@@ -0,0 +1,56 @@
+package config
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/pelletier/go-toml/v2"
+)
+
+type (
+	Config struct {
+		Google GoogleConfig `toml:"google"`
+	}
+
+	GoogleConfig struct {
+		ApiKey string `toml:"api_key"`
+		ClientID string `toml:"client_id"`
+		ClientSecret string `toml:"client_secret"`
+	}
+)
+
+var defaultConfig = Config{
+	Google: GoogleConfig{
+		ApiKey: "<your API key here>",
+		ClientID: "<your client ID here>",
+		ClientSecret: "<your client secret here>",
+	},
+}
+
+const CONFIG_FILENAME = "config.toml"
+
+func ReadConfig(filename string) (*Config, error) {
+	cfgBytes, err := os.ReadFile(filename)
+	if err != nil {
+		if err == os.ErrNotExist {
+			return nil, nil
+		}
+		return nil, fmt.Errorf("failed to open file: %v", err)
+	}
+
+	config := Config{}
+	err = toml.Unmarshal(cfgBytes, &config)
+	if err != nil { return &config, fmt.Errorf("failed to parse: %v", err) }
+
+	return &config, nil
+}
+
+func GenerateConfig(filename string) error {
+	file, err := os.OpenFile(filename, os.O_CREATE, 0644)
+	if err != nil { return err }
+
+	err = toml.NewEncoder(file).Encode(defaultConfig)
+	if err != nil { return err }
+
+	return nil
+}