trails/openspec/specs/wahoo-import/spec.md

Purpose

Provider-agnostic activity sync framework with Wahoo as the first provider, supporting OAuth connection, webhook-based automatic sync, manual import, and FIT-to-GPX conversion.

Requirements

Requirement: Provider-agnostic sync framework

The system SHALL provide a common interface for external activity sync providers.

Scenario: Add new provider

• WHEN a developer wants to add a new sync provider (e.g., Garmin)
• THEN they implement the SyncProvider interface in a single file
• AND register it in the provider registry
• AND all OAuth, webhook, import, and settings UI works automatically

Requirement: Connect Wahoo account

Users SHALL be able to connect their Wahoo account via OAuth2.

Scenario: Connect Wahoo

• WHEN a user clicks "Connect Wahoo" in journal settings
• THEN they are redirected to Wahoo's OAuth authorization page with scopes workouts_read, user_read, offline_data, routes_write
• AND after granting permission, redirected back to the journal
• AND access and refresh tokens are stored in sync_connections
• AND the granted scopes are recorded in sync_connections.granted_scopes so feature gates can detect missing scopes without round-tripping to Wahoo

Scenario: Disconnect Wahoo

• WHEN a user clicks "Disconnect" next to their Wahoo connection
• THEN the stored tokens are deleted from sync_connections

Scenario: Token refresh

• WHEN a Wahoo API call fails with an expired token
• THEN the refresh token is used to obtain a new access token automatically

Scenario: Existing connection without routes_write

• WHEN a user connected before the routes_write scope was added attempts an action that requires it (such as pushing a route)
• THEN the system detects the missing scope from sync_connections.granted_scopes and routes the user through OAuth re-authorization to grant the new scope
• AND the existing tokens remain valid until re-auth completes; ongoing read flows (workout import, webhook ingestion) continue to work

Requirement: Webhook-based automatic sync

New Wahoo workouts SHALL be automatically imported when they complete.

Scenario: Webhook receives new workout

• WHEN Wahoo sends a workout_summary webhook to /api/sync/webhook/wahoo
• THEN the system identifies the user via provider_user_id
• AND downloads the FIT file from Wahoo's CDN (without auth headers, as CDN URLs are pre-signed)
• AND converts it to GPX
• AND creates a journal activity with the GPX, stats, and PostGIS geometry
• AND records the import in sync_imports to prevent duplicates

Scenario: Webhook for workout without file

• WHEN a webhook arrives for a workout with no FIT file URL
• THEN the activity is created without GPX or geometry

Scenario: Duplicate webhook

• WHEN a webhook arrives for a workout already imported
• THEN the import is skipped silently (idempotent)

Scenario: Unknown user webhook

• WHEN a webhook arrives with a provider_user_id not matching any connection
• THEN the request is ignored with a 200 response (don't reveal user existence)

Requirement: Manual import

Users SHALL be able to browse and selectively import older Wahoo workouts.

Scenario: View workout list

• WHEN a user visits the Wahoo import page
• THEN their Wahoo workouts are listed with date, type, duration, and distance
• AND already-imported workouts are marked as "Imported"
• AND third-party workouts (fitness_app_id >= 1000) are filtered out, as Wahoo does not share their data via the API
• AND workouts without a FIT file show a "No GPS" badge with a tooltip explaining the provider has no route data

Scenario: Import single workout

• WHEN a user clicks "Import" on a Wahoo workout
• THEN the import runs in the background using a fetcher (no page refresh)
• AND the button shows "Importing..." during the import
• AND changes to "Imported" when complete

Scenario: Import all workouts

• WHEN a user clicks "Import all"
• THEN all unimported workouts on the current page are imported sequentially
• AND a progress indicator shows "Importing X of Y..."

Requirement: Activity import metadata

Imported activities SHALL show their origin in the UI.

Scenario: View imported activity

• WHEN a user views an activity that was imported from Wahoo
• THEN an "Imported from wahoo" badge is displayed on the detail page

Scenario: Delete and reimport

• WHEN a user deletes an imported activity
• THEN the sync_imports record is also deleted
• AND the workout appears as importable again on the import page

Requirement: FIT to GPX conversion

The system SHALL convert Wahoo's FIT binary files to GPX format.

Scenario: Convert FIT with GPS data

• WHEN a FIT file contains GPS track records
• THEN track points with lat, lon, elevation, and ISO 8601 timestamps are extracted
• AND coordinates are used as-is from the FIT parser (which already converts semicircles to degrees)
• AND a valid GPX string is produced using generateGpx

Scenario: FIT without GPS data

• WHEN a FIT file has no GPS records (e.g., indoor trainer workout)
• THEN the activity is created without GPX or geometry (stats only)

Scenario: Workout without FIT file

• WHEN a workout has no file URL (e.g., aborted recording, third-party app data)
• THEN the activity is created without GPX or geometry