From a54f903326c13b49131f647d7f35512188604a13 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Thu, 24 Oct 2024 17:14:35 +0100
Subject: [PATCH] add time and elevation to gpx parsing

---
 elm.json            |  3 ++-
 src/Track.elm       | 19 +++++++++++++++++--
 tests/TrackTest.elm |  7 ++++---
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/elm.json b/elm.json
index 6516dad..48e0104 100644
--- a/elm.json
+++ b/elm.json
@@ -9,7 +9,9 @@
             "elm/browser": "1.0.2",
             "elm/core": "1.0.5",
             "elm/html": "1.0.0",
+            "elm/time": "1.0.0",
             "elm-explorations/test": "2.2.0",
+            "rtfeldman/elm-iso8601-date-strings": "1.1.4",
             "ymtszw/elm-xml-decode": "3.2.2"
         },
         "indirect": {
@@ -17,7 +19,6 @@
             "elm/json": "1.1.3",
             "elm/parser": "1.1.0",
             "elm/random": "1.0.0",
-            "elm/time": "1.0.0",
             "elm/url": "1.0.0",
             "elm/virtual-dom": "1.0.3",
             "miniBill/elm-xml-parser": "1.0.1",
diff --git a/src/Track.elm b/src/Track.elm
index 12075c8..3bcb60a 100644
--- a/src/Track.elm
+++ b/src/Track.elm
@@ -1,18 +1,33 @@
 module Track exposing (Track, Point, parse)
 
 import Result
-import Xml.Decode as XD exposing (path, list, floatAttr)
+import Xml.Decode as XD exposing (path, list, single, floatAttr, stringAttr)
+import Time -- exposing (utc, toHour, toMinute, toSecond)
+import Iso8601
 
 type alias Point =
     { lat : Float
     , lon : Float
+    , ele : Float
+    , time : Time.Posix
     }
 
 type alias Track =  List Point
 
-pointDecoder = XD.map2 Point
+timeDecoder : XD.Decoder Time.Posix
+timeDecoder = XD.andThen (\ts ->
+                          case Iso8601.toTime ts of
+                              Result.Ok time -> XD.succeed time
+                              Result.Err f -> XD.fail "err"
+                         )
+              XD.string
+
+pointDecoder = XD.map4 Point
                (floatAttr "lat")
                (floatAttr "lon")
+               (path ["ele"] (single XD.float))
+               (path ["time"] (single timeDecoder))
+
 
 gpxDecoder =
              (path [ "trk", "trkseg", "trkpt" ] (list pointDecoder))
diff --git a/tests/TrackTest.elm b/tests/TrackTest.elm
index 538b8d2..a8be878 100644
--- a/tests/TrackTest.elm
+++ b/tests/TrackTest.elm
@@ -4,6 +4,7 @@ import Fixtures
 import Track exposing (Track, Point)
 import Test exposing (..)
 import Expect exposing (Expectation)
+import Time
 
 specs: Test
 specs =
@@ -13,9 +14,9 @@ specs =
               let
                   r = Track.parse Fixtures.threepoints
                   expected =
-                      [ (Point 51.600643 -0.01856)
-                      , (Point 51.600679 -0.018179)
-                      , (Point 51.600697 -0.018064)
+                      [ (Point 51.600643 -0.01856  64.8 (Time.millisToPosix 1729669252256))
+                      , (Point 51.600679 -0.018179  65.5 (Time.millisToPosix 1729669255259))
+                      , (Point 51.600697 -0.018064 66.2 (Time.millisToPosix 1729669256231))
                       ]
 
               in