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Displaying Date and Time (zero padded values)
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-- Show the current time in your time zone. | |
-- | |
-- Read how it works: | |
-- https://guide.elm-lang.org/effects/time.html | |
import Browser | |
import Html exposing (..) | |
import Task | |
import Time exposing (..) | |
-- MAIN | |
main = | |
Browser.element | |
{ init = init | |
, view = view | |
, update = update | |
, subscriptions = subscriptions | |
} | |
-- MODEL | |
type alias Model = | |
{ zone : Time.Zone | |
, time : Time.Posix | |
} | |
init : () -> (Model, Cmd Msg) | |
init _ = | |
( Model Time.utc (Time.millisToPosix 0) | |
, Task.perform AdjustTimeZone Time.here | |
) | |
-- UPDATE | |
type Msg | |
= Tick Time.Posix | |
| AdjustTimeZone Time.Zone | |
update : Msg -> Model -> (Model, Cmd Msg) | |
update msg model = | |
case msg of | |
Tick newTime -> | |
( { model | time = newTime } | |
, Cmd.none | |
) | |
AdjustTimeZone newZone -> | |
( { model | zone = newZone } | |
, Cmd.none | |
) | |
-- SUBSCRIPTIONS | |
subscriptions : Model -> Sub Msg | |
subscriptions _ = | |
Time.every 1000 Tick | |
-- VIEW | |
zeroPadedStringfromInt : Int -> String | |
zeroPadedStringfromInt x = | |
if x > 0 && x < 10 then | |
"0" ++ String.fromInt x | |
else | |
String.fromInt x | |
monthToString : Month -> String | |
monthToString month = | |
case month of | |
Jan -> "01" | |
Feb -> "02" | |
Mar -> "03" | |
Apr -> "04" | |
May -> "05" | |
Jun -> "06" | |
Jul -> "07" | |
Aug -> "08" | |
Sep -> "09" | |
Oct -> "10" | |
Nov -> "11" | |
Dec -> "12" | |
view : Model -> Html Msg | |
view model = | |
let | |
-- Date | |
year = String.fromInt (Time.toYear model.zone model.time) | |
month = monthToString (Time.toMonth model.zone model.time) | |
day = zeroPadedStringfromInt (Time.toDay model.zone model.time) | |
-- Time | |
hour = zeroPadedStringfromInt (Time.toHour model.zone model.time) | |
minute = String.fromInt (Time.toMinute model.zone model.time) | |
second = zeroPadedStringfromInt (Time.toSecond model.zone model.time) | |
in | |
h1 [] [ text (year ++ "." ++ month ++ "." ++ day ++ " " ++ hour ++ ":" ++ minute ++ ":" ++ second) ] |
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