Rework app setup

server/internal/app/config.go

@@ -0,0 +1,112 @@
+package app
+
+import (
+	"fmt"
+	"novamd/internal/secrets"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Config holds the configuration for the application
+type Config struct {
+	DBPath            string
+	WorkDir           string
+	StaticPath        string
+	Port              string
+	AppURL            string
+	CORSOrigins       []string
+	AdminEmail        string
+	AdminPassword     string
+	EncryptionKey     string
+	JWTSigningKey     string
+	RateLimitRequests int
+	RateLimitWindow   time.Duration
+	IsDevelopment     bool
+}
+
+// DefaultConfig returns a new Config instance with default values
+func DefaultConfig() *Config {
+	return &Config{
+		DBPath:            "./novamd.db",
+		WorkDir:           "./data",
+		StaticPath:        "../app/dist",
+		Port:              "8080",
+		RateLimitRequests: 100,
+		RateLimitWindow:   time.Minute * 15,
+		IsDevelopment:     false,
+	}
+}
+
+// validate checks if the configuration is valid
+func (c *Config) validate() error {
+	if c.AdminEmail == "" || c.AdminPassword == "" {
+		return fmt.Errorf("NOVAMD_ADMIN_EMAIL and NOVAMD_ADMIN_PASSWORD must be set")
+	}
+
+	// Validate encryption key
+	if err := secrets.ValidateKey(c.EncryptionKey); err != nil {
+		return fmt.Errorf("invalid NOVAMD_ENCRYPTION_KEY: %w", err)
+	}
+
+	return nil
+}
+
+// LoadConfig creates a new Config instance with values from environment variables
+func LoadConfig() (*Config, error) {
+	config := DefaultConfig()
+
+	if env := os.Getenv("NOVAMD_ENV"); env != "" {
+		config.IsDevelopment = env == "development"
+	}
+
+	if dbPath := os.Getenv("NOVAMD_DB_PATH"); dbPath != "" {
+		config.DBPath = dbPath
+	}
+
+	if workDir := os.Getenv("NOVAMD_WORKDIR"); workDir != "" {
+		config.WorkDir = workDir
+	}
+
+	if staticPath := os.Getenv("NOVAMD_STATIC_PATH"); staticPath != "" {
+		config.StaticPath = staticPath
+	}
+
+	if port := os.Getenv("NOVAMD_PORT"); port != "" {
+		config.Port = port
+	}
+
+	if appURL := os.Getenv("NOVAMD_APP_URL"); appURL != "" {
+		config.AppURL = appURL
+	}
+
+	if corsOrigins := os.Getenv("NOVAMD_CORS_ORIGINS"); corsOrigins != "" {
+		config.CORSOrigins = strings.Split(corsOrigins, ",")
+	}
+
+	config.AdminEmail = os.Getenv("NOVAMD_ADMIN_EMAIL")
+	config.AdminPassword = os.Getenv("NOVAMD_ADMIN_PASSWORD")
+	config.EncryptionKey = os.Getenv("NOVAMD_ENCRYPTION_KEY")
+	config.JWTSigningKey = os.Getenv("NOVAMD_JWT_SIGNING_KEY")
+
+	// Configure rate limiting
+	if reqStr := os.Getenv("NOVAMD_RATE_LIMIT_REQUESTS"); reqStr != "" {
+		if parsed, err := strconv.Atoi(reqStr); err == nil {
+			config.RateLimitRequests = parsed
+		}
+	}
+
+	if windowStr := os.Getenv("NOVAMD_RATE_LIMIT_WINDOW"); windowStr != "" {
+		if parsed, err := time.ParseDuration(windowStr); err == nil {
+			config.RateLimitWindow = parsed
+		}
+	}
+
+	// Validate all settings
+	if err := config.validate(); err != nil {
+		return nil, err
+	}
+
+	return config, nil
+}