Support uploading .geojson files directly

A .geojson file needs no GPX/FIT conversion — it's already the shape
gpx.js expects — so GpxStore#geojson now just reads and returns it
as-is, no cache sidecar. save/tree/the upload dropzone and its zip
handling all pick it up through the existing TRACK_EXTENSIONS list.

Also fixes a bug the new "cached" tree icon would have shipped with:
a GPX/FIT's own .geojson cache sidecar (e.g. "ride.gpx.geojson") also
matches the new .geojson branch in list_children, which would have
listed it as a second, phantom tree entry — excluded explicitly, with
a regression test.

app.rb

@@ -169,8 +169,8 @@ module Maptool
     end
 
     # A .zip (Garmin's bulk/FIT export format) is expanded into its
-    # .gpx/.fit entries instead of being stored itself — nothing downstream
-    # (tree listing, map rendering) knows what to do with a zip.
+    # .gpx/.fit/.geojson entries instead of being stored itself — nothing
+    # downstream (tree listing, map rendering) knows what to do with a zip.
     post "/api/gpx" do
       require_login!
       file = params[:file]

docs/architecture.adoc

@@ -221,11 +221,11 @@ This is a live, online-only overlay — it always needs internet access
 and is unrelated to the offline PMTiles basemap above. Per RainViewer's
 terms, the API is free for personal/non-commercial use.
 
-== GPX/FIT tracks and waypoints
+== GPX/FIT/GeoJSON tracks and waypoints
 
 The "Tracks" map control (`public/js/gpx.js`) opens a side panel to
-upload GPX or FIT files by dragging them in, organize them into
-folders (also by dragging), and toggle each one on the map
+upload GPX, FIT or GeoJSON files by dragging them in, organize them
+into folders (also by dragging), and toggle each one on the map
 individually.
 
 Storage:: Files are stored as-is under `data/gpx/`, in a
@@ -243,13 +243,18 @@ which the panel renders recursively (folders as `<details>`, files as
 a checkbox, both with a delete button).
 
 Drag & drop:: The dropzone at the top of the panel accepts one or more
-`.gpx`/`.fit` files, or a `.zip` (`POST /api/gpx`, multipart) into the
-top level, or click it to browse instead. A `.zip` — Garmin's bulk/FIT
-export format — isn't stored itself: `save_zip_entries` (`app.rb`)
-expands it with `rubyzip` and saves each `.gpx`/`.fit` entry it
-contains individually (flattened — any folder structure inside the
-zip is discarded), skipping anything else (readme files, etc.) it
-might hold. An already-uploaded file (a
+`.gpx`/`.fit`/`.geojson` files, or a `.zip` (`POST /api/gpx`,
+multipart) into the top level, or click it to browse instead. A
+`.geojson` file needs no format conversion — it's already the shape
+`gpx.js` expects — so `GpxStore#geojson` just serves it straight from
+disk (see "Rendering" below); useful for a file already in this app's
+own schema, e.g. one exported elsewhere in that shape, or a previous
+`GET /api/gpx/file` response saved and re-uploaded. A `.zip` —
+Garmin's bulk/FIT export format — isn't stored itself:
+`save_zip_entries` (`app.rb`) expands it with `rubyzip` and saves each
+`.gpx`/`.fit`/`.geojson` entry it contains individually (flattened —
+any folder structure inside the zip is discarded), skipping anything
+else (readme files, etc.) it might hold. An already-uploaded file (a
 `.gpx-tree__file` row, `draggable`) can be dragged onto a folder to
 move it there (`POST /api/gpx/move`), or dropped anywhere else in the
 tree to move it back to the top level; an OS file can also be dropped
@@ -276,7 +281,11 @@ status) instead of on whichever toggle happens to be first — a silent
 multi-second hang on a checkbox click reads as broken in a way the
 same wait during an upload doesn't. A file that fails to parse still
 saves fine either way; the error just surfaces on first view instead.
-`Gpx` parses the GPX with REXML: `<wpt>`
+A `.geojson` upload skips this path entirely — `geojson` reads and
+returns it directly, no cache file, no `Gpx`/`Fit` involved; the file
+tree's cached-file icon (`GEOJSON_ICON`, `public/js/icons.js`) always
+shows for one, since there's no conversion step it could ever be
+waiting on. `Gpx` parses the GPX with REXML: `<wpt>`
 waypoints become `Point` features (with `name`, `desc` and `time`
 carried through as properties), each `<trk>` becomes one
 `MultiLineString` feature (one line per `<trkseg>`), and each `<rte>`

lib/maptool/geojson.rb

@@ -0,0 +1,18 @@
+module Maptool
+  # A directly-uploaded .geojson file needs no conversion — GpxStore serves
+  # it straight from disk (see GpxStore#geojson) — so unlike Gpx/Fit there's
+  # no to_geojson here. Only kind-detection lives here, for the tree's badge
+  # icons, mirroring Gpx.kinds' cheap substring-search rather than a full
+  # JSON parse: a POI export can be tens of MB, geojson or not, and a full
+  # parse just to answer "does this have any points/lines" would cost the
+  # same either way.
+  module Geojson
+    def self.kinds(path)
+      content = File.read(path)
+      kinds = []
+      kinds << "waypoint" if content.include?('"Point"')
+      kinds << "track" if content.include?('"LineString"') # matches MultiLineString too
+      kinds
+    end
+  end
+end

lib/maptool/gpx_store.rb

@@ -2,6 +2,7 @@ require "fileutils"
 require "json"
 require_relative "gpx"
 require_relative "fit"
+require_relative "geojson"
 
 module Maptool
   # Filesystem-backed store for uploaded GPX/FIT files, organized in
@@ -110,9 +111,14 @@ module Maptool
     # can take tens of seconds, every single time the file is toggled
     # visible. Cached alongside the source file and invalidated by mtime,
     # so only the first read after a save (or edit) pays that cost.
+    #
+    # A directly-uploaded .geojson file skips all of this — it's already in
+    # the shape gpx.js expects, so there's nothing to convert or cache;
+    # it's just read and served as-is.
     def geojson(relative_path)
       path = resolve_file(relative_path)
       raise Errno::ENOENT, path unless File.file?(path)
+      return File.read(path) if path.downcase.end_with?(".geojson")
 
       cache = geojson_cache_path(path)
       unless geojson_cached?(path)
@@ -139,12 +145,16 @@ module Maptool
       "#{path}.geojson"
     end
 
+    # A .geojson source needs no separate cache file — it already is the
+    # target format, so it's always "ready".
     def geojson_cached?(path)
+      return true if path.downcase.end_with?(".geojson")
+
       cache = geojson_cache_path(path)
       File.file?(cache) && File.mtime(cache) >= File.mtime(path)
     end
 
-    TRACK_EXTENSIONS = %w[.gpx .fit].freeze
+    TRACK_EXTENSIONS = %w[.gpx .fit .geojson].freeze
 
     def safe_filename(filename)
       base = File.basename(filename.to_s)
@@ -176,6 +186,12 @@ module Maptool
           { "type" => "file", "name" => entry, "path" => rel, "kinds" => Gpx.kinds(full), "cached" => geojson_cached?(full) }
         elsif entry.downcase.end_with?(".fit")
           { "type" => "file", "name" => entry, "path" => rel, "kinds" => Fit.kinds(full), "cached" => geojson_cached?(full) }
+        # A GPX/FIT's own cache sidecar (e.g. "ride.gpx.geojson", written by
+        # `geojson` above) also ends in ".geojson" — excluded here so it
+        # doesn't show up as a second, phantom tree entry next to the file
+        # it was derived from.
+        elsif entry.downcase.end_with?(".geojson") && !entry.downcase.end_with?(".gpx.geojson", ".fit.geojson")
+          { "type" => "file", "name" => entry, "path" => rel, "kinds" => Geojson.kinds(full), "cached" => true }
         end
       end
     end

public/js/gpx.js

@@ -620,9 +620,12 @@ export class GpxPanelControl {
 
   async _uploadFiles(fileList, folder) {
     // .zip: Garmin's bulk/FIT export format — the server expands it into
-    // its .gpx/.fit entries, so it's accepted here even though the tree
-    // never shows a .zip itself.
-    const files = [...fileList].filter((file) => /\.(gpx|fit|zip)$/i.test(file.name));
+    // its .gpx/.fit/.geojson entries, so it's accepted here even though the
+    // tree never shows a .zip itself. .geojson needs no server-side
+    // conversion (GpxStore#geojson serves it as-is) — accepted here so a
+    // file already in this app's own shape (e.g. a previous /api/gpx/file
+    // response, saved and re-uploaded) can skip GPX/FIT entirely.
+    const files = [...fileList].filter((file) => /\.(gpx|fit|geojson|zip)$/i.test(file.name));
     if (files.length === 0) return;
 
     this._setStatus(files.length === 1 ? "Uploading…" : `Uploading ${files.length} files…`);

test/test_app.rb

@@ -60,6 +60,18 @@ class AppTest < Minitest::Test
     assert_operator track["properties"]["distance_meters"], :>, 0
   end
 
+  def test_geojson_upload_is_served_back_unchanged
+    content = '{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"kind":"waypoint","name":"Spot"},"geometry":{"type":"Point","coordinates":[17.1,48.1]}}]}'
+    response = post_file("/api/gpx", filename: "spots.geojson", content: content, env: logged_in_env)
+
+    assert_equal 200, response.status
+    assert_equal ["spots.geojson"], json_body(response)["paths"]
+
+    file_response = request.get("/api/gpx/file/spots.geojson")
+    assert_equal 200, file_response.status
+    assert_equal "Spot", json_body(file_response)["features"][0]["properties"]["name"]
+  end
+
   def test_unparseable_gpx_returns_422
     post_file("/api/gpx", filename: "bad.gpx", content: "<gpx><trk unclosed>", env: logged_in_env)
 

test/test_gpx_store.rb

@@ -145,6 +145,35 @@ class GpxStoreTest < Minitest::Test
     refute file["cached"]
   end
 
+  def test_geojson_extension_is_preserved_not_forced_to_gpx
+    path = @store.save(folder: "", filename: "spots.geojson", io: StringIO.new(sample_geojson))
+    assert_equal "spots.geojson", path
+  end
+
+  def test_uploaded_geojson_is_served_as_is_with_no_cache_file
+    path = @store.save(folder: "", filename: "spots.geojson", io: StringIO.new(sample_geojson))
+
+    assert_equal sample_geojson, @store.geojson(path)
+    refute File.file?(@store.resolve_file(path) + ".geojson"), "a .geojson source needs no separate cache sidecar"
+  end
+
+  def test_uploaded_geojson_is_always_reported_cached
+    @store.save(folder: "", filename: "spots.geojson", io: StringIO.new(sample_geojson))
+
+    file = @store.tree["children"].find { |c| c["name"] == "spots.geojson" }
+    assert file["cached"]
+    assert_equal ["waypoint"], file["kinds"]
+  end
+
+  # A GPX/FIT's own GeoJSON cache sidecar (e.g. "ride.gpx.geojson") also
+  # ends in ".geojson" — regression test for it not showing up as its own
+  # second, phantom tree entry alongside "ride.gpx".
+  def test_geojson_cache_sidecar_is_not_listed_as_its_own_tree_entry
+    @store.save(folder: "", filename: "ride.gpx", io: StringIO.new(sample_gpx))
+
+    assert_equal ["ride.gpx"], @store.tree["children"].map { |c| c["name"] }
+  end
+
   private
 
   def sample_gpx
@@ -152,4 +181,8 @@ class GpxStoreTest < Minitest::Test
       <gpx><wpt lat="48.1" lon="17.1"><name>Waypoint</name></wpt></gpx>
     GPX
   end
+
+  def sample_geojson
+    '{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"kind":"waypoint","name":"Spot"},"geometry":{"type":"Point","coordinates":[17.1,48.1]}}]}'
+  end
 end

views/index.erb

@@ -48,12 +48,12 @@
     <strong>Tracks</strong>
     <div class="gpx-panel__actions">
       <button type="button" class="gpx-panel__action" data-action="new-folder" title="New folder" aria-label="New folder"></button>
-      <button type="button" class="gpx-panel__action" data-action="upload" title="Upload GPX/FIT file" aria-label="Upload GPX/FIT file"></button>
+      <button type="button" class="gpx-panel__action" data-action="upload" title="Upload GPX/FIT/GeoJSON file" aria-label="Upload GPX/FIT/GeoJSON file"></button>
       <button type="button" class="gpx-panel__close" aria-label="Close">&times;</button>
     </div>
   </div>
 
-  <input type="file" class="gpx-file-input" accept=".gpx,.fit,.zip" multiple hidden>
+  <input type="file" class="gpx-file-input" accept=".gpx,.fit,.geojson,.zip" multiple hidden>
   <p class="gpx-upload__status" hidden></p>
 
   <div class="gpx-tree"></div>