init

internal/config/config.go

@@ -0,0 +1,83 @@
+package config
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+type Config struct {
+	HTTPAddr    string
+	DatabaseURL string
+	SessionKey  string
+	AppEnv      string
+	AdminEmail  string
+	AdminPass   string
+}
+
+func Load() Config {
+	if err := loadDotEnv(".env"); err != nil {
+		fmt.Fprintf(os.Stderr, "warning: load .env: %v\n", err)
+	}
+
+	return Config{
+		HTTPAddr:    getenv("HTTP_ADDR", ":8080"),
+		DatabaseURL: getenv("DATABASE_URL", "postgres://postgres:postgres@localhost:5433/superbanka?sslmode=disable"),
+		SessionKey:  getenv("SESSION_KEY", "dev-session-key-change-me"),
+		AppEnv:      getenv("APP_ENV", "development"),
+		AdminEmail:  getenv("ADMIN_EMAIL", "admin@superbanka.local"),
+		AdminPass:   getenv("ADMIN_PASSWORD", "admin123456"),
+	}
+}
+
+func getenv(key, fallback string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+
+	return fallback
+}
+
+func loadDotEnv(path string) error {
+	file, err := os.Open(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	lineNumber := 0
+	for scanner.Scan() {
+		lineNumber++
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		key, value, ok := strings.Cut(line, "=")
+		if !ok {
+			return fmt.Errorf("line %d: missing '='", lineNumber)
+		}
+
+		key = strings.TrimSpace(key)
+		value = strings.TrimSpace(value)
+		value = strings.Trim(value, `"'`)
+		if key == "" {
+			return fmt.Errorf("line %d: empty key", lineNumber)
+		}
+
+		if _, exists := os.LookupEnv(key); exists {
+			continue
+		}
+
+		if err := os.Setenv(key, value); err != nil {
+			return fmt.Errorf("line %d: set %s: %w", lineNumber, key, err)
+		}
+	}
+
+	return scanner.Err()
+}