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|
module Dialog exposing
( Msg(..)
, Model
, Config
, init
, update
, view
)
import Platform.Cmd exposing (Cmd)
import Task exposing (Task)
import Html exposing (..)
import Html.Attributes exposing (..)
import Html.Events exposing (..)
-- Model
type alias Model model msg =
{ config : Maybe (Config model msg)
, mapMsg : Msg model msg -> msg
}
type alias Config model msg =
{ title : String
, body : model -> Html msg
, confirm : String
, confirmMsg : model -> Result msg msg
, undo : String
}
init : (Msg model msg -> msg) -> Model model msg
init mapMsg =
{ config = Nothing
, mapMsg = mapMsg
}
-- Update
type Msg model msg =
NoOp
| ConfirmMsg (model -> Result msg msg)
| Open (Config model msg)
| Close
update : Msg model msg -> model -> Model model msg -> (Model model msg, Cmd msg)
update msg baseModel model =
case msg of
NoOp ->
( model
, Cmd.none
)
ConfirmMsg confirmMsg ->
case confirmMsg baseModel of
Ok msg ->
( { model | config = Nothing }
, Task.perform (always msg) (always msg) (Task.succeed NoOp)
)
Err msg ->
( model
, Task.perform (always msg) (always msg) (Task.succeed NoOp)
)
Open config ->
( { model | config = Just config }
, Cmd.none
)
Close ->
( { model | config = Nothing }
, Cmd.none
)
-- View
view : model -> Model model msg -> Html msg
view model { mapMsg, config } =
let isVisible =
case config of
Just _ -> True
Nothing -> False
in div
[ class "dialog" ]
[ curtain mapMsg isVisible
, case config of
Nothing ->
text ""
Just c ->
dialog model mapMsg c
]
curtain : (Msg model msg -> msg) -> Bool -> Html msg
curtain mapMsg isVisible =
div
[ class "curtain"
, style
[ ("position", "fixed")
, ("top", "0")
, ("left", "0")
, ("width", "100%")
, ("height", "100%")
, ("background-color", "rgba(0, 0, 0, 0.5)")
, ("z-index", if isVisible then "1000" else "-1")
, ("opacity", if isVisible then "1" else "0")
, ("transition", "all 0.2s ease")
]
, onClick (mapMsg Close)
]
[]
dialog : model -> (Msg model msg -> msg) -> Config model msg -> Html msg
dialog model mapMsg { title, body, confirm, confirmMsg, undo } =
div
[ class "content"
, style
[ ("position", "fixed")
, ("top", "25%")
, ("left", "50%")
, ("transform", "translate(-50%, -25%)")
, ("z-index", "1000")
, ("background-color", "white")
, ("padding", "20px")
, ("border-radius", "5px")
, ("box-shadow", "0px 0px 15px rgba(0, 0, 0, 0.5)")
]
]
[ h1 [] [ text title ]
, body model
, div
[ style
[ ("float", "right")
]
]
[ button
[ class "confirm"
, onClick (mapMsg <| ConfirmMsg confirmMsg)
, style
[ ("margin-right", "15px")
]
]
[ text confirm ]
, button
[ class "undo"
, onClick (mapMsg Close)
]
[ text undo ]
]
]
|
