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module Cover exposing (..)
import Browser
import Html exposing (..)
import Html.Events exposing (onInput, onClick)
import Html.Attributes exposing (..)
main = Browser.document { init = init, update = update, view = view, subscriptions = (\m -> Sub.none)}
type alias Model = (String, Int, String)
init : String -> (Model, Cmd Msg)
init baseurl = (("", 10, baseurl), Cmd.none)
type Msg = Change String | SlideInc | SlideDec
update : Msg -> Model -> (Model, Cmd Msg)
update msg (prefix,m,b) = let model = case msg of
Change new -> (new, m, b)
SlideInc -> (prefix, m + 1, b)
SlideDec -> (prefix, Basics.max (m - 1) 1, b)
in (model, Cmd.none)
view : Model -> Browser.Document Msg
view model = { title = "Picarones"
, body = [body model]
}
body : Model -> Html Msg
body (prefix, max, baseurl) =
div [class "input-form"] [ h1 [] [text "Create new slide session:"], div [] []
, div [ class "grid" ]
[ divtext "enter slide uri:", input [ placeholder "https://yourdomain.tld/path-to-slides", value prefix, onInput Change ] []
, divtext "number of slides:", mkNumberInput max
, divtext "your link:", mkLink (prefix, max, baseurl)
]
, mkRemark prefix
]
divtext : String -> Html Msg
divtext str = div [class "gridentry"] [text str]
mkNumberInput : Int -> Html Msg
mkNumberInput i =
span []
[ button [onClick SlideDec] [text "-"]
, text (String.fromInt i)
, button [onClick SlideInc] [text "+"]
]
mkLink : Model -> Html Msg
mkLink (p, max, baseurl) = case p of
"" -> text "(none yet)"
prefix -> let link = baseurl ++ "/slide.html#" ++ prefix ++ "#" ++ (String.fromInt max)
in a [ href link ] [ text link ]
mkRemark : String -> Html Msg
mkRemark prefix = let example = case prefix of
"" -> "https://yourdomain.tld/path-to-slides/01.png"
_ -> prefix ++ "01.png"
in div [class "remark"] [
p [] [text ("""Your slides should be available at the above uri, postfixed with a
double-digit number and a .png extension, e.g. """ ++ example ++
" should contain an image.")]
, p [] [text "You can convert a pdf to images like this:"]
, pre [] [text "pdftoppm -png slides.pdf -scale-to-y 1080 -scale-to-x -1 slide"]
]
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