From 4a61f3eb3103aa512bef1b0d82295403bc4bc977 Mon Sep 17 00:00:00 2001
From: Martin Kagamino Lehoux <martin@lehoux.net>
Date: Thu, 27 Aug 2026 19:07:33 +0200
Subject: Swap ride read path from GPX to FIT for performance

Always use FIT for detail, official climb creation and backtest;
keep GPX fallback for legacy rides pending backfill. FIT is 10-20x
smaller and parses without XML.
---
 ride/store.go      | 12 +++++++++++-
 ride/store_test.go | 12 +++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

(limited to 'ride')

diff --git a/ride/store.go b/ride/store.go
index f6de535..9429acf 100644
--- a/ride/store.go
+++ b/ride/store.go
@@ -56,7 +56,17 @@ func Save(db *sql.DB, r StoredRide) error {
 	var cotacolAlgorithmVersion any
 	var movingTimeS any
 	var movingTimeAlgorithmVersion any
-	if r.GPXPath != "" {
+	if r.FitPath != "" {
+		parsed, err := ParseFile(FITRideParser{}, r.FitPath)
+		if err != nil {
+			return fmt.Errorf("compute ride values for %q: %w", r.ExternalID, err)
+		}
+		cotacolScore = climb.Cotacol(parsed.Distances, parsed.Elevations)
+		cotacolAlgorithmVersion = climb.CotacolAlgorithmVersion
+		movingTimeS = int64(MovingTime(parsed) / time.Second)
+		movingTimeAlgorithmVersion = MovingTimeAlgorithmVersion
+	} else if r.GPXPath != "" {
+		// Legacy fallback for rides created before FIT (e.g. tests).
 		parsed, err := ParseFile(GPXRideParser{}, r.GPXPath)
 		if err != nil {
 			return fmt.Errorf("compute ride values for %q: %w", r.ExternalID, err)
diff --git a/ride/store_test.go b/ride/store_test.go
index 1ee3c69..1fca056 100644
--- a/ride/store_test.go
+++ b/ride/store_test.go
@@ -20,11 +20,20 @@ func newTestDB(t *testing.T) *sql.DB {
 
 func sampleRide(t *testing.T) StoredRide {
 	t.Helper()
-	gpxPath := filepath.Join(t.TempDir(), "ride.gpx")
+	dir := t.TempDir()
+	gpxPath := filepath.Join(dir, "ride.gpx")
 	require.NoError(t, os.WriteFile(gpxPath, []byte(testGPX), 0o600))
+	fitPath := filepath.Join(dir, "ride.fit")
+	parsed, err := ParseFile(GPXRideParser{}, gpxPath)
+	require.NoError(t, err)
+	f, err := os.Create(fitPath)
+	require.NoError(t, err)
+	require.NoError(t, EncodeFIT(parsed, f))
+	require.NoError(t, f.Close())
 	return StoredRide{
 		ExternalID:          "strava:1234",
 		GPXPath:             gpxPath,
+		FitPath:             fitPath,
 		Name:                "Morning Ride",
 		Type:                "Ride",
 		StartDate:           time.Date(2026, 8, 1, 7, 30, 0, 0, time.UTC),
@@ -112,6 +121,7 @@ func TestSaveAllowsRideWithoutGPX(t *testing.T) {
 	indoor := sampleRide(t)
 	indoor.ExternalID = "strava:14701658670"
 	indoor.GPXPath = ""
+	indoor.FitPath = ""
 
 	require.NoError(t, Save(db, indoor))
 
-- 
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