fix: require server env vars (#129)

apps/freya-backend/src/lib/env.ts

@@ -0,0 +1,69 @@
+export interface ServerEnv {
+	betterAuthSecret: string
+	credentialEncryptionKey: string
+	databaseUrl: string
+	exaApiKey: string
+	googleMapsApiKey: string
+	openrouterApiKey: string
+	openrouterModel: string | undefined
+	tflApiKey: string
+	weatherkitKeyId: string
+	weatherkitPrivateKey: string
+	weatherkitServiceId: string
+	weatherkitTeamId: string
+}
+
+export function ensureEnv(env: Record<string, string | undefined>): ServerEnv {
+	const missing: string[] = []
+
+	const betterAuthSecret = readRequiredEnv(env, "BETTER_AUTH_SECRET", missing)
+	const credentialEncryptionKey = readRequiredEnv(env, "CREDENTIAL_ENCRYPTION_KEY", missing)
+	const databaseUrl = readRequiredEnv(env, "DATABASE_URL", missing)
+	const exaApiKey = readRequiredEnv(env, "EXA_API_KEY", missing)
+	const openrouterApiKey = readRequiredEnv(env, "OPENROUTER_API_KEY", missing)
+	const tflApiKey = readRequiredEnv(env, "TFL_API_KEY", missing)
+	const weatherkitPrivateKey = readRequiredEnv(env, "WEATHERKIT_PRIVATE_KEY", missing)
+	const weatherkitKeyId = readRequiredEnv(env, "WEATHERKIT_KEY_ID", missing)
+	const weatherkitTeamId = readRequiredEnv(env, "WEATHERKIT_TEAM_ID", missing)
+	const weatherkitServiceId = readRequiredEnv(env, "WEATHERKIT_SERVICE_ID", missing)
+	const googleMapsApiKey = readRequiredEnv(env, "GOOGLE_MAPS_API_KEY", missing)
+
+	if (missing.length > 0) {
+		throw new Error(`Missing required environment variables: ${missing.join(", ")}`)
+	}
+
+	return {
+		betterAuthSecret,
+		credentialEncryptionKey,
+		databaseUrl,
+		exaApiKey,
+		googleMapsApiKey,
+		openrouterApiKey,
+		openrouterModel: readOptionalEnv(env, "OPENROUTER_MODEL"),
+		tflApiKey,
+		weatherkitKeyId,
+		weatherkitPrivateKey,
+		weatherkitServiceId,
+		weatherkitTeamId,
+	}
+}
+
+function readRequiredEnv(
+	env: Record<string, string | undefined>,
+	name: string,
+	missing: string[],
+): string {
+	const value = readOptionalEnv(env, name)
+	if (!value) {
+		missing.push(name)
+	}
+	return value ?? ""
+}
+
+function readOptionalEnv(
+	env: Record<string, string | undefined>,
+	name: string,
+): string | undefined {
+	const value = env[name]?.trim()
+	return value ? value : undefined
+}