Initial release: collaborative trip planner

Multi-user trip planning web app in a single Docker container. Mullvad-style token accounts, trip sharing via join codes, day-by-day calendar with typed entries (activity, hotel, travel, flight, rental car, immigration, note), multi-leg flight segments with bundled IATA airport dataset, Leaflet/OSM map with per-leg great-circle km (air vs ground), rough km-driven vs rental included-km comparison, cost splitting with settle-up suggestions, flip-clock departure countdown. Node 20 + Express + SQLite (WAL, additive migrations), vanilla JS SPA, 44 API tests.

src/server/db.js

@@ -0,0 +1,88 @@
+import Database from 'better-sqlite3';
+
+const SCHEMA = `
+CREATE TABLE IF NOT EXISTS users (
+  id INTEGER PRIMARY KEY,
+  token_hash TEXT UNIQUE NOT NULL,
+  display_name TEXT NOT NULL,
+  created_at TEXT DEFAULT current_timestamp
+);
+
+CREATE TABLE IF NOT EXISTS trips (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL,
+  start_date TEXT NOT NULL,
+  end_date TEXT NOT NULL,
+  owner_id INTEGER NOT NULL REFERENCES users(id),
+  currency TEXT NOT NULL DEFAULT 'USD',
+  join_code TEXT UNIQUE NOT NULL,
+  created_at TEXT DEFAULT current_timestamp
+);
+
+CREATE TABLE IF NOT EXISTS trip_members (
+  trip_id INTEGER NOT NULL REFERENCES trips(id),
+  user_id INTEGER NOT NULL REFERENCES users(id),
+  role TEXT NOT NULL DEFAULT 'editor',
+  PRIMARY KEY (trip_id, user_id)
+);
+
+CREATE TABLE IF NOT EXISTS entries (
+  id INTEGER PRIMARY KEY,
+  trip_id INTEGER NOT NULL REFERENCES trips(id),
+  date TEXT NOT NULL,
+  type TEXT NOT NULL,
+  title TEXT NOT NULL,
+  details TEXT DEFAULT '',
+  start_time TEXT,
+  end_time TEXT,
+  location_name TEXT,
+  lat REAL,
+  lng REAL,
+  sort_order INTEGER NOT NULL DEFAULT 0,
+  price REAL,
+  paid_by INTEGER REFERENCES users(id),
+  split_mode TEXT NOT NULL DEFAULT 'equal',
+  segments TEXT,
+  rental TEXT,
+  created_at TEXT DEFAULT current_timestamp
+);
+
+CREATE TABLE IF NOT EXISTS entry_participants (
+  entry_id INTEGER NOT NULL REFERENCES entries(id),
+  user_id INTEGER NOT NULL REFERENCES users(id),
+  PRIMARY KEY (entry_id, user_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_entries_trip ON entries(trip_id, date, sort_order, id);
+CREATE INDEX IF NOT EXISTS idx_members_user ON trip_members(user_id);
+CREATE INDEX IF NOT EXISTS idx_participants_entry ON entry_participants(entry_id);
+`;
+
+// Columns added after the initial release: CREATE TABLE IF NOT EXISTS never
+// alters existing tables, so databases created by an older version need them
+// backfilled with ALTER TABLE.
+const MIGRATIONS = [
+  { table: 'trips', column: 'currency', ddl: "ALTER TABLE trips ADD COLUMN currency TEXT NOT NULL DEFAULT 'USD'" },
+  { table: 'entries', column: 'price', ddl: 'ALTER TABLE entries ADD COLUMN price REAL' },
+  { table: 'entries', column: 'paid_by', ddl: 'ALTER TABLE entries ADD COLUMN paid_by INTEGER REFERENCES users(id)' },
+  { table: 'entries', column: 'split_mode', ddl: "ALTER TABLE entries ADD COLUMN split_mode TEXT NOT NULL DEFAULT 'equal'" },
+  { table: 'entries', column: 'segments', ddl: 'ALTER TABLE entries ADD COLUMN segments TEXT' },
+  { table: 'entries', column: 'rental', ddl: 'ALTER TABLE entries ADD COLUMN rental TEXT' },
+];
+
+function applyMigrations(db) {
+  for (const { table, column, ddl } of MIGRATIONS) {
+    const columns = db.prepare(`PRAGMA table_info(${table})`).all();
+    if (!columns.some((c) => c.name === column)) db.exec(ddl);
+  }
+}
+
+// Open (or create) the SQLite database at dbPath and ensure the schema exists.
+export function openDb(dbPath) {
+  const db = new Database(dbPath);
+  db.pragma('journal_mode = WAL');
+  db.pragma('foreign_keys = ON');
+  db.exec(SCHEMA);
+  applyMigrations(db);
+  return db;
+}