rough skeleton and basic user authentication

util/conf.go

@@ -0,0 +1,54 @@
+package util
+
+import (
+	"errors"
+	"os"
+	"strings"
+
+	"github.com/joho/godotenv"
+)
+
+func LoadConfig() (*Config, error) {
+	config := Config{}
+	
+	err := config.loadEnv()
+	if err != nil {
+		return nil, err
+	}
+	// other sources?
+
+	config.verify()
+	return &config, nil
+}
+
+type Config struct {
+	ClientID string
+	RedirectURI string
+}
+
+func (c *Config) loadEnv() error {
+	err := godotenv.Load()
+	if err != nil {
+		return err
+	}
+
+	if str, found := os.LookupEnv("CLIENT_ID"); found {
+		c.ClientID = strings.TrimSpace(str)
+	}
+	if str, found := os.LookupEnv("REDIR_URI"); found {
+		c.RedirectURI = strings.TrimSpace(str)
+	}
+
+	return nil
+}
+
+func (c *Config) verify() error {
+	if c.ClientID == "" {
+		return errors.New("unable to load a configured Client ID")
+	}
+	if c.RedirectURI == "" {
+		return errors.New("unable to load a configured Redirect URI")
+	}
+
+	return nil
+}