refactor: python to go

internal/config/config.go

@@ -0,0 +1,53 @@
+package config
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/joho/godotenv"
+)
+
+type Config struct {
+  Host     string
+  Port     string
+  DBHost   string
+  DBPort   string
+  DBName   string
+  DBUser   string
+  DBPass   string
+  SMTPHost string
+  SMTPPort string
+  SMTPUser string
+  SMTPPass string
+}
+
+func LoadConfig() (*Config, error) {
+  godotenv.Load()
+
+  cfg := &Config{
+    Host:     getEnv("HOST", "0.0.0.0"),
+    Port:     getEnv("PORT", "8080"),
+    DBHost:   getEnv("PG_HOST", "localhost"),
+    DBPort:   getEnv("PG_PORT", "5432"),
+    DBName:   getEnv("PG_DATABASE", "newsletter"),
+    DBUser:   getEnv("PG_USER", "postgres"),
+    DBPass:   getEnv("PG_PASSWORD", ""),
+    SMTPHost: getEnv("SMTP_SERVER", ""),
+    SMTPPort: getEnv("SMTP_PORT", "587"),
+    SMTPUser: getEnv("SMTP_USER", ""),
+    SMTPPass: getEnv("SMTP_PASSWORD", ""),
+  }
+
+  if cfg.SMTPHost == "" {
+    return nil, fmt.Errorf("SMTP_SERVER not configured")
+  }
+
+  return cfg, nil
+}
+
+func getEnv(key, defaultVal string) string {
+  if value, exists := os.LookupEnv(key); exists {
+    return value
+  }
+  return defaultVal
+}