feat: add better auth sqlite runtime and server-side session flow

server/db/client.ts

@@ -0,0 +1,64 @@
+import "server-only";
+
+import Database from "better-sqlite3";
+import { drizzle, type BetterSQLite3Database } from "drizzle-orm/better-sqlite3";
+import { ensureDataDirectories, getServerConfig } from "@/server/config";
+import * as schema from "@/server/db/schema";
+
+export type SqliteConnection = {
+  sqlite: Database.Database;
+  db: BetterSQLite3Database<typeof schema>;
+};
+
+const globalForSqlite = globalThis as typeof globalThis & {
+  __netaSqliteConnection?: SqliteConnection;
+  __netaSqliteCloseHandlersRegistered?: boolean;
+};
+
+export function getSqliteConnection(): SqliteConnection {
+  if (globalForSqlite.__netaSqliteConnection) {
+    return globalForSqlite.__netaSqliteConnection;
+  }
+
+  const config = getServerConfig();
+  ensureDataDirectories(config);
+
+  const sqlite = new Database(config.databasePath);
+  applyPragmas(sqlite);
+
+  const connection = {
+    sqlite,
+    db: drizzle({ client: sqlite, schema }),
+  };
+
+  globalForSqlite.__netaSqliteConnection = connection;
+  registerCloseHandlers();
+  return connection;
+}
+
+export function closeSqliteConnection(): void {
+  const connection = globalForSqlite.__netaSqliteConnection;
+
+  if (!connection) {
+    return;
+  }
+
+  connection.sqlite.close();
+  globalForSqlite.__netaSqliteConnection = undefined;
+}
+
+export function applyPragmas(sqlite: Database.Database): void {
+  sqlite.pragma("foreign_keys = ON");
+  sqlite.pragma("journal_mode = WAL");
+  sqlite.pragma("synchronous = NORMAL");
+  sqlite.pragma("busy_timeout = 5000");
+}
+
+function registerCloseHandlers(): void {
+  if (globalForSqlite.__netaSqliteCloseHandlersRegistered || process.env.NODE_ENV !== "production") {
+    return;
+  }
+
+  process.once("beforeExit", closeSqliteConnection);
+  globalForSqlite.__netaSqliteCloseHandlersRegistered = true;
+}