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nocal/docs/ROADMAP.md
Bernardo Magri dd6e02cb55 feat: add PKCE OAuth boundary
Introduce provider-neutral HTTP contracts and public-client authorization-code orchestration with PKCE S256, strict HTTPS and loopback validation, constant-time state checks, secure OpenSSL entropy, and single-send token exchange semantics.

Add independent protocol and adversarial suites covering RFC 7636, RFC3986 encoding, callback failures, response redaction, and no-retry behavior. Concrete networking, browser/listener, token parsing, Secret Service, and Graph integration remain separate follow-up slices.
2026-07-18 11:11:28 +01:00

3.8 KiB

Roadmap

Foundation — current milestone

  • C++20 domain model and deterministic six-week month layout
  • Responsive, theme-native ANSI month view with keyboard navigation
  • Appointment focus, dense-day traversal, and full-frame detail reader
  • Validated add/edit/delete forms with confirmation and failure rollback
  • Guarded atomic .ics persistence, advisory locking, and round-trip tests
  • Bounded session undo/redo, exact external-change detection, and backup recovery
  • Windowed recurrence expansion, compatible RDATE, EXDATE, IANA TZID, and multi-day segment cues
  • Occurrence-aware appointment search with exact result-to-grid navigation
  • Session calendar toggles shared by month rendering, focus, and search
  • Read-only 42-day agenda with bounded recurrence and exact return navigation
  • Configurable week start with Monday-default CLI and consistent grid queries
  • Explicit atomic import/export with validation, collision refusal, and backups
  • Meson build, Nix development shell, desktop entry, and Hyprland launcher
  • Seeded sample data when explicitly requested, never silent data mutation

0.1 — complete local calendar

  • Advanced recurrence rule editing and detached RECURRENCE-ID overrides
  • Embedded VTIMEZONE support
  • Screen-reader-friendly linear view and full Unicode display-width handling

0.2 — durable cache and provider boundary — in progress

Completed cache foundation:

  • Provider-neutral SQLite WAL cache in a private local file
  • Versioned, all-or-nothing schema migrations
  • Raw provider payload retention, inactive calendars, and event tombstones
  • Per-calendar/window opaque cursors committed atomically with pulled pages
  • Normalized event instances for immutable snapshots
  • Reserved transactional outbox and conflict records for later remote writes

Completed HTTP/OAuth boundary:

  • Generic injected HTTP transport and deterministic fakes, with retries left to provider operations
  • Public-desktop OAuth authorization code design with PKCE S256, system browser, and loopback redirect
  • Multitenant Microsoft account audience and delegated least-privilege Calendars.Read; tenant policy may still require administrator consent or block user consent
  • No client secret in the open-source desktop binary

Next provider-boundary slices:

  • Concrete HTTP, browser/loopback, token JSON, and Secret Service adapters
  • OAuth secrets in Secret Service, never SQLite
  • Generic SyncProvider contract and observable sync status

0.3 — CalDAV

  • Discovery and incremental sync for Nextcloud and standards-compliant servers
  • ETag-aware writes, offline mutation queue, conflict UI
  • TLS and failure-path integration tests

0.4 — hosted providers

  • Google Calendar adapter with incremental synchronization
  • Microsoft 365 read-only discovery and Graph delta synchronization, followed by ETag-aware remote writes after the conflict boundary is proven
  • Account/calendar management UI and per-calendar ANSI identity

The cache and generic HTTP/OAuth boundaries are prerequisites, not usable Microsoft 365 integration. The boundary phase has no concrete HTTP transport, real browser/loopback adapter, token parser, Secret Service backend, Graph call, or account setup. The immediate sequence is concrete desktop, HTTP, and Secret Service adapters, then read-only Microsoft Graph discovery and delta synchronization.

1.0 — distribution quality

  • Stable configuration/data format and documented recovery procedures
  • Nomarchy package, Hyprland defaults, man page, shell completions
  • Performance budgets exercised against large and adversarial calendars
  • Fuzzed iCalendar parser, accessibility review, translations

Quality gates

Every milestone requires clean warning-enabled builds, unit and integration tests, sanitizer runs, terminal-state recovery after signals/errors, no network access without explicit account setup, and no loss of unknown calendar data.