From 2c00b74cc02b55e26d68fef108596aae56080d5a Mon Sep 17 00:00:00 2001
From: Martin Kagamino Lehoux <martin@lehoux.net>
Date: Sat, 8 Aug 2026 10:05:05 +0200
Subject: feat: Persist Cotacol ride values

---
 ride/difficulty_test.go | 30 +++++++++++++++---------------
 ride/ride.go            |  6 ++++--
 2 files changed, 19 insertions(+), 17 deletions(-)

(limited to 'ride')

diff --git a/ride/difficulty_test.go b/ride/difficulty_test.go
index 4b72037..142ac0a 100644
--- a/ride/difficulty_test.go
+++ b/ride/difficulty_test.go
@@ -7,48 +7,48 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestDifficultyScoreConstantClimb(t *testing.T) {
+func TestCotacolConstantClimb(t *testing.T) {
 	r := RideBuilder{precision: 100}.WithSection("2km at 7%").Build()
-	assert.InDelta(t, 98.0, r.DifficultyScore(), 1e-9)
+	assert.InDelta(t, 98.0, ride.Cotacol(r), 1e-9)
 }
 
-func TestDifficultyScoreIgnoresDescent(t *testing.T) {
+func TestCotacolIgnoresDescent(t *testing.T) {
 	r := RideBuilder{precision: 100}.WithSection("2km at 7%").WithSection("2km at -7%").Build()
-	assert.InDelta(t, 98.0, r.DifficultyScore(), 1e-9)
+	assert.InDelta(t, 98.0, ride.Cotacol(r), 1e-9)
 }
 
-func TestDifficultyScoreFlatIsZero(t *testing.T) {
+func TestCotacolFlatIsZero(t *testing.T) {
 	r := RideBuilder{precision: 100}.WithSection("5km at 0%").Build()
-	assert.Zero(t, r.DifficultyScore())
+	assert.Zero(t, ride.Cotacol(r))
 }
 
-func TestDifficultyScoreSteepShortCountsMore(t *testing.T) {
+func TestCotacolSteepShortCountsMore(t *testing.T) {
 	steep := RideBuilder{precision: 100}.WithSection("0.5km at 14%").Build()
 	long := RideBuilder{precision: 100}.WithSection("1km at 7%").Build()
-	assert.InDelta(t, 98.0, steep.DifficultyScore(), 1e-9)
-	assert.InDelta(t, 49.0, long.DifficultyScore(), 1e-9)
+	assert.InDelta(t, 98.0, ride.Cotacol(steep), 1e-9)
+	assert.InDelta(t, 49.0, ride.Cotacol(long), 1e-9)
 }
 
-func TestDifficultyScorePrecisionInvariant(t *testing.T) {
+func TestCotacolPrecisionInvariant(t *testing.T) {
 	coarse := RideBuilder{precision: 100}.WithSection("3km at 5%").Build()
 	fine := RideBuilder{precision: 50}.WithSection("3km at 5%").Build()
-	assert.InDelta(t, coarse.DifficultyScore(), fine.DifficultyScore(), 1e-9)
+	assert.InDelta(t, ride.Cotacol(coarse), ride.Cotacol(fine), 1e-9)
 }
 
-func TestDifficultyScoreExampleRide(t *testing.T) {
+func TestCotacolExampleRide(t *testing.T) {
 	r, err := ride.ParseFile(parser, "../examples/2022-07-21.Pogacar.gpx")
 	assert.NoError(t, err)
-	assert.InDelta(t, 3049.0, r.DifficultyScore(), 1)
+	assert.InDelta(t, 3049.0, ride.Cotacol(r), 1)
 }
 
-func TestDifficultyScoreClimbNotAtStart(t *testing.T) {
+func TestCotacolClimbNotAtStart(t *testing.T) {
 	r := RideBuilder{precision: 100}.WithSection("1km at 0%").WithSection("2km at 7%").Build()
 	climbs := r.AllClimbs()
 	assert.Len(t, climbs, 1)
 	assert.InDelta(t, 98.0, climbs[0].DifficultyScore(), 1e-9)
 }
 
-func TestDifficultyScoreHautacamClimbfinderReference(t *testing.T) {
+func TestCotacolHautacamClimbfinderReference(t *testing.T) {
 	r, err := ride.ParseFile(parser, "../examples/2022-07-21.Pogacar.gpx")
 	assert.NoError(t, err)
 	climbs := r.AllClimbs()
diff --git a/ride/ride.go b/ride/ride.go
index ef91272..52f95b8 100644
--- a/ride/ride.go
+++ b/ride/ride.go
@@ -245,8 +245,10 @@ func (r *Ride) ScoreFromKm(start, end float64) float64 {
 	return Score(*r, i, j)
 }
 
-func (r *Ride) DifficultyScore() float64 {
-	return difficultyScore(*r, 0, r.Len()-1)
+const CotacolAlgorithmVersion = "v1"
+
+func Cotacol(ride Ride) float64 {
+	return difficultyScore(ride, 0, ride.Len()-1)
 }
 
 func difficultyScore(r Ride, startIndex, endIndex int) float64 {
-- 
cgit v1.2.3