🏷️ Use interface for configuration

src/config/configuration.interface.ts

@@ -0,0 +1,39 @@
+export interface Configuration {
+  frontendUrl: string;
+
+  meta: {
+    totpServiceName: string;
+  };
+
+  caching: {
+    geolocationLruSize: number;
+  };
+
+  security: {
+    saltRounds: number;
+    jwtSecret: string;
+    totpWindowPast: number;
+    totpWindowFuture: number;
+    mfaTokenExpiry: string;
+    accessTokenExpiry: string;
+    passwordPwnedCheck: boolean;
+    unusedRefreshTokenExpiryDays: number;
+  };
+
+  email: {
+    name: string;
+    from: string;
+    host: string;
+    port: number;
+    secure: boolean;
+    auth: {
+      user: string;
+      pass: string;
+    };
+  };
+
+  payments: {
+    stripeApiKey: string;
+    stripeProductId: string;
+  };
+}

src/config/configuration.ts

@@ -1,34 +1,43 @@
-export default () => ({
+import { ConfigFactory } from '@nestjs/config/dist/interfaces';
+import { Configuration } from './configuration.interface';
+
+export const int = (val: string | undefined, num: number): number =>
+  val ? (isNaN(parseInt(val)) ? num : parseInt(val)) : num;
+
+const configuration: Configuration = {
   frontendUrl: process.env.FRONTEND_URL ?? 'http://localhost:3000',
   meta: {
     totpServiceName: process.env.TOPT_SERVICE_NAME ?? 'Staart',
   },
   caching: {
-    geolocationLruSize: process.env.GEOLOCATION_LRU_SIZE ?? 100,
+    geolocationLruSize: int(process.env.GEOLOCATION_LRU_SIZE, 100),
   },
   security: {
-    saltRounds: process.env.SALT_ROUNDS ?? 10,
+    saltRounds: int(process.env.SALT_ROUNDS, 10),
     jwtSecret: process.env.JWT_SECRET ?? 'staart',
-    totpWindowPast: process.env.TOTP_WINDOW_PAST ?? 1,
-    totpWindowFuture: process.env.TOTP_WINDOW_PAST ?? 0,
+    totpWindowPast: int(process.env.TOTP_WINDOW_PAST, 1),
+    totpWindowFuture: int(process.env.TOTP_WINDOW_PAST, 0),
     mfaTokenExpiry: process.env.MFA_TOKEN_EXPIRY ?? '10m',
     accessTokenExpiry: process.env.ACCESS_TOKEN_EXPIRY ?? '1h',
     passwordPwnedCheck: !!process.env.PASSWORD_PWNED_CHECK,
-    unusedRefreshTokenExpiryDays: process.env.DELETE_EXPIRED_SESSIONS ?? 30,
+    unusedRefreshTokenExpiryDays: int(process.env.DELETE_EXPIRED_SESSIONS, 30),
   },
   email: {
     name: process.env.EMAIL_NAME ?? 'Staart',
-    from: process.env.EMAIL_FROM,
-    host: process.env.EMAIL_HOST,
-    port: process.env.EMAIL_PORT,
+    from: process.env.EMAIL_FROM ?? '',
+    host: process.env.EMAIL_HOST ?? '',
+    port: int(process.env.EMAIL_PORT, 587),
     secure: !!process.env.EMAIL_SECURE,
     auth: {
-      user: process.env.EMAIL_USER ?? process.env.EMAIL_FROM,
-      pass: process.env.EMAIL_PASSWORD,
+      user: process.env.EMAIL_USER ?? process.env.EMAIL_FROM ?? '',
+      pass: process.env.EMAIL_PASSWORD ?? '',
     },
   },
   payments: {
-    stripeApiKey: process.env.STRIPE_API_KEY,
-    stripeProductId: process.env.STRIPE_PRODUCT_ID,
+    stripeApiKey: process.env.STRIPE_API_KEY ?? '',
+    stripeProductId: process.env.STRIPE_PRODUCT_ID ?? '',
   },
-});
+};
+
+const configFunction: ConfigFactory<Configuration> = () => configuration;
+export default configFunction;