Two import entry points: - Home page: "Import GPX" button next to "Start Planning" - In-session: drag-and-drop GPX onto the map (with confirmation) Parses GPX client-side, extracts waypoints (Douglas-Peucker) and no-go areas from extensions. Non-GPX files show error toast. Also: - Fix spec drift: non-GPX drop now shows error toast (was silent) - Add E2E tests for import button, invalid GPX, and session creation - Archive gpx-import-planner change, sync specs Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Context
The planner currently receives GPX data only via URL parameters or the journal API. All GPX parsing infrastructure exists (parseGpxAsync, extractWaypoints, no-go area parsing) but there's no user-facing file upload. Users expect to open a local GPX file directly — standard in every route planning tool.
Goals / Non-Goals
Goals:
- Let users import a GPX file from the planner home page to start a new session
- Let users import a GPX file into an existing session (replacing current waypoints)
- Support drag-and-drop onto the map as an alternative to the file picker
- Reuse existing GPX parsing, waypoint extraction, and no-go area infrastructure
Non-Goals:
- Importing non-GPX formats (KML, GeoJSON, FIT) — future work
- Merging imported GPX with existing session data — import replaces
- Server-side file storage — GPX is parsed client-side, only waypoints/no-go areas are stored in Yjs
Decisions
Client-side parsing: Parse GPX in the browser using parseGpxAsync (which uses native DOMParser). No need to upload the file to the server. Extract waypoints and no-go areas, then initialize the Yjs session.
Two entry points:
- Home page: Upload button next to "Start Planning". Creates a new session with the imported data.
- Session map: Drag-and-drop onto the map. Replaces current waypoints and no-go areas after confirmation.
Session creation flow (home page): POST the parsed waypoints and no-go areas to /api/sessions (same as the journal handoff), then redirect to the new session URL with data in query params.
In-session import (drag-and-drop): Parse client-side, confirm replacement, then update Yjs arrays directly. No server round-trip needed.
Risks / Trade-offs
- Large GPX files: Douglas-Peucker runs client-side. Files with 100K+ points may be slow. Acceptable for v1 — optimize later if needed.
- Replacing vs merging: Import replaces all waypoints/no-go areas. Users might expect to add to existing data. A confirmation dialog mitigates accidental loss.