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go-inbucket/ui/src/Modal.elm
2020-03-29 19:26:59 -07:00

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1.5 KiB
Elm

module Modal exposing (Msg, resetFocusCmd, updateSession, view)
import Browser.Dom as Dom
import Data.Session as Session exposing (Session)
import Html exposing (Html, div, span, text)
import Html.Attributes exposing (class, id, tabindex)
import Html.Events exposing (onFocus)
import Task
type alias Msg =
Result Dom.Error ()
{-| Creates a command to focus the modal dialog.
-}
resetFocusCmd : (Msg -> msg) -> Cmd msg
resetFocusCmd resultMsg =
Task.attempt resultMsg (Dom.focus domId)
{-| Updates a Session with an error Flash if the resetFocusCmd failed.
-}
updateSession : Msg -> Session -> Session
updateSession result session =
case result of
Ok () ->
session
Err (Dom.NotFound missingDomId) ->
let
flash =
{ title = "DOM element not found"
, table = [ ( "Element ID", missingDomId ) ]
}
in
Session.showFlash flash session
view : msg -> Maybe (Html msg) -> Html msg
view unfocusedMsg maybeModal =
case maybeModal of
Just modal ->
div [ class "modal-mask" ]
[ span [ onFocus unfocusedMsg, tabindex 0 ] []
, div [ id domId, class "modal well", tabindex -1 ] [ modal ]
, span [ onFocus unfocusedMsg, tabindex 0 ] []
]
Nothing ->
text ""
{-| DOM ID of the modal dialog.
-}
domId : String
domId =
"modal-dialog"