dainvo

Dainvo

Dainvo is a production-oriented desktop calendar app for Windows and macOS. It will start as a fully capable local calendar backed by SQLite, then add provider sync for Google Calendar, Outlook/Microsoft 365, and generic CalDAV.

Current MVP

The first milestone is a local desktop calendar client:

Electron shell for cross-platform desktop delivery.
React and TypeScript renderer for the user interface.
SQLite in the Electron main process as the local source of truth.
Typed IPC and preload APIs between renderer and main process.
Temporary local data panel for exercising calendar/event IPC before FullCalendar is added.

The MVP should support local calendars, local event CRUD, event editing, reminders, basic recurrence, and import/export before external provider sync is added.

Long-Term Direction

Dainvo is intended to become a calendar and scheduling hub that can:

Sync Google Calendar events.
Sync Outlook/Microsoft 365 events through Microsoft Graph.
Sync generic CalDAV calendars.
Schedule meetings with attendees and availability checks.
Link calendar time blocks to documents, tasks, projects, and due dates.
Keep a local SQLite cache/source of truth for fast rendering and offline work.

Architecture

The app uses Electron with a strict separation between main, preload, and renderer code.

The Electron main process owns SQLite, provider SDKs, OAuth/token storage, and sync.
The preload script exposes a narrow typed window.calendarApi.
The React renderer owns UI state and calls main process capabilities only through typed IPC.
FullCalendar is the calendar UI renderer only. It is not the app backend and does not own event persistence.

The local application service and SQLite database are the backend for UI rendering. Provider sync reconciles remote calendar state with the local store.

Expected Commands

These commands define the current project workflow:

pnpm install
pnpm dev
pnpm build
pnpm test
pnpm lint
pnpm typecheck

pnpm dev starts Vite, compiles the Electron main/preload code, and launches Electron. pnpm build produces the renderer and main-process build output and copies SQL migrations into dist.