refactor: move all configs to a validated configs module

app/(auth)/adapter.ts

@@ -1,18 +1,18 @@
-import { Ok, Err, Result } from 'ts-results-es';
+import { Ok, Err, type Result } from 'ts-results-es';
 
+import config from '@/config';
 import { extractErrorMessageOrDefault } from '@/lib/utils';
 
-import {
+import type {
   ApiCreateProjectResponse,
   ApiCreateWorkspaceResponse,
   ApiListAllProjectsResponse,
   ApiListAllWorkspacesResponse,
 } from './types';
 
-const patternCoreEndpoint = process.env.PATTERN_CORE_ENDPOINT;
-if (!patternCoreEndpoint) {
-  throw new Error('PATTERN_CORE_ENDPOINT is not set');
-}
+const {
+  patternCoreEndpoint: { value: patternCoreEndpoint },
+} = config;
 
 /**
  * Get all workspaces

app/(auth)/auth.config.ts

@@ -1,6 +1,8 @@
-import { type SIWESession } from '@reown/appkit-siwe';
+import type { SIWESession } from '@reown/appkit-siwe';
 import type { NextAuthConfig } from 'next-auth';
 
+import config from '@/config';
+
 import { fetchSessionPrerequisites } from './service';
 
 declare module 'next-auth' {
@@ -22,10 +24,11 @@ declare module 'next-auth/jwt' {
   }
 }
 
-export const nextAuthSecret = process.env.NEXTAUTH_SECRET;
-if (!nextAuthSecret) {
-  throw new Error('NEXTAUTH_SECRET is not set');
-}
+const {
+  nextAuth: {
+    secret: { value: nextAuthSecret },
+  },
+} = config;
 
 export const authConfig = {
   secret: nextAuthSecret,

app/(auth)/auth.ts

@@ -6,22 +6,14 @@ import NextAuth from 'next-auth';
 import 'next-auth/jwt';
 import credentialsProvider from 'next-auth/providers/credentials';
 
+import config from '@/config';
+
 import { authConfig } from './auth.config';
 
-/**
- * TODO: Move all configs into a validated configs module to avoid duplication
- *
- * https://github.com/pattern-tech/pattern-app/issues/3
- */
-export const nextAuthSecret = process.env.NEXTAUTH_SECRET;
-if (!nextAuthSecret) {
-  throw new Error('NEXTAUTH_SECRET is not set');
-}
+const {
+  patternCoreEndpoint: { value: patternCoreEndpoint },
+} = config;
 
-const patternCoreEndpoint = process.env.PATTERN_CORE_ENDPOINT;
-if (!patternCoreEndpoint) {
-  throw new Error('PATTERN_CORE_ENDPOINT is not set');
-}
 const siweVerificationApi = `${patternCoreEndpoint}/auth/verify`;
 
 const providers = [

app/(auth)/service.ts

@@ -1,4 +1,4 @@
-import { Err, Ok, Result } from 'ts-results-es';
+import { Err, Ok, type Result } from 'ts-results-es';
 
 import {
   createProjectInWorkspace,
@@ -7,11 +7,6 @@ import {
   getAllWorkspaces,
 } from './adapter';
 
-const patternCoreEndpoint = process.env.PATTERN_CORE_ENDPOINT;
-if (!patternCoreEndpoint) {
-  throw new Error('PATTERN_CORE_ENDPOINT is not set');
-}
-
 /**
  * Checks if the default workspace and project exist, if not, creates them
  * @param accessToken

app/(chat)/adapter.ts

@@ -9,12 +9,12 @@ import type {
   ApiGetAllConversationsResponse,
   ApiRenameConversationResponse,
 } from '@/app/(chat)/types';
+import config from '@/config';
 import { extractErrorMessageOrDefault } from '@/lib/utils';
 
-const patternCoreEndpoint = process.env.PATTERN_CORE_ENDPOINT;
-if (!patternCoreEndpoint) {
-  throw new Error('PATTERN_CORE_ENDPOINT is not set');
-}
+const {
+  patternCoreEndpoint: { value: patternCoreEndpoint },
+} = config;
 
 /**
  * Get a conversation

app/config/index.tsx

@@ -16,9 +16,11 @@ import {
 import { getCsrfToken, getSession, signIn, signOut } from 'next-auth/react';
 import { getAddress } from 'viem';
 
-export const walletConnectProjectId =
-  process.env.NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID;
-if (!walletConnectProjectId) throw new Error('Project ID is not defined');
+import config from '@/config/config-client-only';
+
+export const {
+  walletConnectProjectId: { value: walletConnectProjectId },
+} = config;
 
 export const metadata = {
   name: 'Pattern',

app/context/index.tsx

@@ -5,17 +5,15 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import React, { type ReactNode } from 'react';
 import { type State, WagmiProvider } from 'wagmi';
 
-import {
-  chains,
-  metadata,
-  walletConnectProjectId,
-  siweConfig,
-  wagmiAdapter,
-} from '../config';
+import config from '@/config/config-client-only';
+
+import { chains, metadata, siweConfig, wagmiAdapter } from '../config';
 
 const queryClient = new QueryClient();
 
-if (!walletConnectProjectId) throw new Error('Project ID is not defined');
+const {
+  walletConnectProjectId: { value: walletConnectProjectId },
+} = config;
 
 createAppKit({
   adapters: [wagmiAdapter],

config/BooleanString.ts

@@ -0,0 +1,13 @@
+export class BooleanString {
+  private constructor(public value: boolean) {}
+
+  static parse(value: string | undefined): BooleanString {
+    if (value === 'true') {
+      return new BooleanString(true);
+    }
+    if (value === 'false') {
+      return new BooleanString(false);
+    }
+    throw new Error(`Cannot parse "${value}" as BooleanString`);
+  }
+}

config/NonEmptyString.ts

@@ -0,0 +1,10 @@
+export class NonEmptyString {
+  private constructor(public value: string) {}
+
+  static parse(value: string | undefined): NonEmptyString {
+    if (value) {
+      return new NonEmptyString(value);
+    }
+    throw new Error(`Cannot parse "${value}" as NonEmptyString`);
+  }
+}

config/PatternCoreEndpoint.ts

@@ -0,0 +1,15 @@
+export class PatternCoreEndpoint {
+  private constructor(public value: string) {}
+
+  static parse(value: string | undefined): PatternCoreEndpoint {
+    if (!value) {
+      throw new Error(`Cannot parse "${value}" as PatternCoreEndpoint`);
+    }
+    try {
+      new URL(value);
+      return new PatternCoreEndpoint(value);
+    } catch (error) {
+      throw new Error(`Cannot parse "${value}" as PatternCoreEndpoint`);
+    }
+  }
+}

config/config-client-only.ts

@@ -0,0 +1,16 @@
+import { NonEmptyString } from './NonEmptyString';
+
+interface PatternUiConfigClientOnly {
+  walletConnectProjectId: NonEmptyString;
+}
+
+const NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID =
+  process.env.NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID;
+
+const config: PatternUiConfigClientOnly = {
+  walletConnectProjectId: NonEmptyString.parse(
+    NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID,
+  ),
+};
+
+export default config;

config/config.ts

@@ -0,0 +1,25 @@
+import 'server-only';
+
+import { BooleanString } from './BooleanString';
+import { NonEmptyString } from './NonEmptyString';
+import { PatternCoreEndpoint } from './PatternCoreEndpoint';
+
+interface PatternUiConfig {
+  nextAuth: {
+    secret: NonEmptyString;
+    trustHost: BooleanString;
+  };
+  patternCoreEndpoint: PatternCoreEndpoint;
+}
+
+const { NEXTAUTH_SECRET, PATTERN_CORE_ENDPOINT, AUTH_TRUST_HOST } = process.env;
+
+const config: PatternUiConfig = {
+  nextAuth: {
+    secret: NonEmptyString.parse(NEXTAUTH_SECRET),
+    trustHost: BooleanString.parse(AUTH_TRUST_HOST),
+  },
+  patternCoreEndpoint: PatternCoreEndpoint.parse(PATTERN_CORE_ENDPOINT),
+};
+
+export default config;

config/index.ts

@@ -0,0 +1 @@
+export { default } from './config';

lib/ai/pattern-model.ts

@@ -13,11 +13,6 @@ import type {
 
 import { extractErrorMessageOrDefault } from '../utils';
 
-export const patternCoreEndpoint = process.env.PATTERN_CORE_ENDPOINT;
-if (!patternCoreEndpoint) {
-  throw new Error('PATTERN_CORE_ENDPOINT is not set');
-}
-
 const textDecoder = new TextDecoder();
 
 export class PatternModel implements LanguageModelV1 {