From d5478db009f0dce35b2779eccb34bb9b63a1a64f Mon Sep 17 00:00:00 2001
From: Dillon Kearns <dillon@incrementalelm.com>
Date: Sun, 16 Jan 2022 14:31:08 -0800
Subject: [PATCH] Add time input.

---
 src/Form.elm        | 62 +++++++++++++++++++++++++++++++++++++++++++++
 src/Form/Value.elm  |  0
 tests/FormTests.elm | 41 ++++++++++++++++++++++++++++++
 3 files changed, 103 insertions(+)
 create mode 100644 src/Form/Value.elm

diff --git a/src/Form.elm b/src/Form.elm
index 8b0b5fcb..cec4cbc6 100644
--- a/src/Form.elm
+++ b/src/Form.elm
@@ -15,6 +15,7 @@ module Form exposing
     , withMax, withMaxDate, withMin, withMinDate
     , withStep, withFloatStep
     , hasErrors2, rawValues, runClientValidations, withClientValidation, withClientValidation2
+    , time
     )
 
 {-|
@@ -1104,6 +1105,67 @@ date name toError toHtmlFn =
         }
 
 
+type alias TimeOfDay =
+    { hours : Int, minutes : Int }
+
+
+{-| -}
+time :
+    String
+    -> { invalid : String -> error }
+    ->
+        (FieldRenderInfo error
+         -> view
+        )
+    ->
+        Field
+            error
+            (Maybe TimeOfDay)
+            view
+            { --min : Date
+              --, max : Date,
+              required : ()
+            , wasMapped : No
+            }
+time name toError toHtmlFn =
+    Field
+        { name = name
+        , initialValue = Nothing
+        , type_ = "date"
+        , required = False
+        , serverValidation = \_ -> DataSource.succeed []
+        , toHtml =
+            \formInfo _ fieldInfo info ->
+                toHtmlFn (toInputRecord formInfo name Nothing info fieldInfo)
+        , decode =
+            \rawString ->
+                (if (rawString |> Maybe.withDefault "") == "" then
+                    Ok Nothing
+
+                 else
+                    rawString
+                        |> Maybe.withDefault ""
+                        |> parseTimeOfDay
+                        |> Result.mapError (\_ -> toError.invalid (rawString |> Maybe.withDefault ""))
+                        |> Result.map Just
+                )
+                    |> toFieldResult
+        , properties = []
+        }
+
+
+parseTimeOfDay rawTimeOfDay =
+    case rawTimeOfDay |> String.split ":" |> List.map String.toInt of
+        [ Just hours, Just minutes ] ->
+            Ok
+                { hours = hours
+                , minutes = minutes
+                }
+
+        _ ->
+            Err ()
+
+
 validateRequiredField : { toError | missing : error } -> Maybe String -> Result error String
 validateRequiredField toError maybeRaw =
     if (maybeRaw |> Maybe.withDefault "") == "" then
diff --git a/src/Form/Value.elm b/src/Form/Value.elm
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/FormTests.elm b/tests/FormTests.elm
index c6525801..5bd17d5b 100644
--- a/tests/FormTests.elm
+++ b/tests/FormTests.elm
@@ -133,6 +133,23 @@ all =
                     |> expectErrorsAfterUpdates
                         [ ( "name", [ "Required" ] )
                         ]
+        , test "parses time" <|
+            \() ->
+                let
+                    form =
+                        Form.succeed identity
+                            |> Form.with
+                                (Form.time "checkin-time"
+                                    { invalid = \_ -> "Invalid time" }
+                                    toInput
+                                    |> Form.required "Required"
+                                )
+                in
+                form
+                    |> expectDecodeNoErrors2 [ ( "checkin-time", "08:45" ) ]
+                        { hours = 8
+                        , minutes = 45
+                        }
         , test "no duplicate validation errors from update call" <|
             \() ->
                 Form.succeed identity
@@ -236,6 +253,19 @@ all =
         ]
 
 
+expectDecodeNoErrors2 : List ( String, String ) -> decoded -> Form.Form String decoded view -> Expect.Expectation
+expectDecodeNoErrors2 updates expected form =
+    let
+        formModel =
+            form
+                |> Form.init
+                |> updateFieldsWithValues updates form
+    in
+    Form.runClientValidations formModel form
+        |> Expect.equal
+            (Ok ( expected, [] ))
+
+
 expectDecodeNoErrors : decoded -> Result error ( decoded, List b ) -> Expect.Expectation
 expectDecodeNoErrors decoded actual =
     actual
@@ -274,6 +304,17 @@ updateAllFields fields form model =
             model
 
 
+updateFieldsWithValues : List ( String, String ) -> Form.Form String value view -> Form.Model -> Form.Model
+updateFieldsWithValues fields form model =
+    fields
+        |> List.foldl
+            (\( fieldName, fieldValue ) modelSoFar ->
+                modelSoFar
+                    |> updateField form ( fieldName, fieldValue )
+            )
+            model
+
+
 expectErrorsAfterUpdates : List ( String, List String ) -> Form.Form String value view -> Expect.Expectation
 expectErrorsAfterUpdates expected form =
     let