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nocal/docs/ROADMAP.md
Bernardo Magri 3560a7d23d feat: store OAuth tokens securely
Add bounded token response parsing with refresh-token retention and a cancellable worker-thread libsecret adapter using versioned credential payloads.

Verify CRUD, isolation, cancellation, corruption, unavailable service, redaction, and cleanup against an isolated D-Bus and gnome-keyring Secret Service in normal, warning-as-error, and sanitizer profiles.
2026-07-18 11:56:04 +01:00

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# 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
Completed concrete Linux adapters:
- libcurl transport with verified TLS, bounded responses/timeouts, no automatic
redirects/retries, and cleartext HTTP only for loopback tests
- Shell-free `xdg-open` launcher and one-shot `127.0.0.1` callback receiver
advertising `http://localhost:<dynamic-port>/nocal/oauth/callback`
- Mobile/Desktop public-client registration at
`http://localhost/nocal/oauth/callback`; Microsoft ignores localhost ports,
while literal HTTP `127.0.0.1` needs a manifest edit and IPv6 loopback is not
supported
Completed token/secret boundary:
- Strict, bounded token JSON parsing with a required initial refresh token
- Refresh-token rotation with retention of the previous token when a refresh
response omits a replacement
- Versioned libsecret payloads keyed by opaque local account IDs
- Synchronous, cancellable Secret Service calls restricted to worker threads
- Real isolated D-Bus/gnome-keyring integration tests
- Explicit missing, locked, cancelled, and failure results; no connected account
until the complete secret store succeeds
- OAuth secrets only in Secret Service, never SQLite, logs, CLI arguments, or
environment variables
Next provider-boundary slices:
- Microsoft `/me` identity and read-only calendar discovery
- Read-only Graph delta synchronization using delegated `Calendars.Read`
- 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, generic HTTP/OAuth boundary, and concrete Linux adapters are
prerequisites, not usable Microsoft 365 integration. The token/Secret
Service phase still provides no Graph call, account UI, or usable account setup.
After it passes verification, the immediate sequence is Microsoft `/me`,
read-only calendar discovery, and Graph 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.