From 2204a53a4f7b3c9504cbd30286be05977addee86 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Fri, 25 Oct 2024 00:00:37 +0100
Subject: [PATCH] parse power

---
 src/Track.elm       |  4 +++-
 tests/Fixtures.elm  | 16 +++++++++++++---
 tests/TrackTest.elm |  3 ++-
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/Track.elm b/src/Track.elm
index a25e824..5793f4f 100644
--- a/src/Track.elm
+++ b/src/Track.elm
@@ -10,6 +10,7 @@ type alias Position = (Float, Float, Maybe Float) -- lat, lon, ele
 type alias Point =
     { loc : Position
     , time : Maybe Time.Posix
+    , power : Maybe Int
     }
 
 type alias Track =  List Point
@@ -24,10 +25,11 @@ timeDecoder = XD.andThen (\ts ->
 
 triple x y z = (x,y,z)
 
-pointDecoder = XD.map2 Point
+pointDecoder = XD.map3 Point
                (XD.map3 triple (floatAttr "lat") (floatAttr "lon")
                         (XD.maybe (path ["ele"] (single XD.float))))
                (XD.maybe (path ["time"] (single timeDecoder)))
+               (XD.maybe (path ["extensions", "gpxtpx:TrackPointExtension", "pwr:PowerInWatts"] (single XD.int)))
 
 
 gpxDecoder =
diff --git a/tests/Fixtures.elm b/tests/Fixtures.elm
index 53d33f7..5228a6b 100644
--- a/tests/Fixtures.elm
+++ b/tests/Fixtures.elm
@@ -65,7 +65,17 @@ xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/
 """
 
 threepoints_expected  =
-    [ (Point (51.600643, -0.01856, Just 64.8) (Just (Time.millisToPosix 1729669252256)))
-    , (Point (51.600679, -0.018179, Just 65.5) (Just (Time.millisToPosix 1729669255259)))
-    , (Point (51.600697, -0.018064, Just 66.2) (Just (Time.millisToPosix 1729669256231)))
+    [ (Point
+           (51.600643, -0.01856, Just 64.8)
+           (Just (Time.millisToPosix 1729669252256))
+           (Just 89)
+      )
+    , (Point
+           (51.600679, -0.018179, Just 65.5)
+           (Just (Time.millisToPosix 1729669255259))
+           (Just 86))
+    , (Point
+           (51.600697, -0.018064, Just 66.2)
+           (Just (Time.millisToPosix 1729669256231))
+           (Just 86))
     ]
diff --git a/tests/TrackTest.elm b/tests/TrackTest.elm
index 2bc7dd9..ef13302 100644
--- a/tests/TrackTest.elm
+++ b/tests/TrackTest.elm
@@ -23,7 +23,8 @@ specs =
                         Fixtures.threepoints
               in
                   case Track.parse xml of
-                      Ok (p::pts) -> Expect.equal p (Point (51.600643, -0.01856, Nothing) (Just (Time.millisToPosix 1729669252256)))
+                      Ok (p::pts) ->
+                          Expect.equal p (Point (51.600643, -0.01856, Nothing) (Just (Time.millisToPosix 1729669252256)) (Just 89))
                       Ok _ -> Expect.fail "empty list"
                       (Err f) -> Expect.fail f