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Magic.fs
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Magic.fs
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module Magic
open Fable.Core.JsInterop
open Fable.React
open Shared
open Feliz
open Feliz.Bulma
open FSharp.Control
open Fable.Reaction
open Utils
type LetterSource =
| None
| Local of Map<int,LetterPos>
| Remote of Map<int,LetterPos>
type LetterString =
| Show of string
| Edit of string
type Model = {
Letters : LetterSource
LetterString : LetterString
}
type Msg =
| ToggleLetters
| ToggleRemoteLetters
| EditLetterStringRequested
| EditLetterStringDone of string
| LetterStringEdited of string
| Letter of int * LetterPos
| RemoteMsg of Shared.Msg
let init letterString = {
Letters = None
LetterString = Show letterString
}
let withToggledLetters model =
match model.Letters with
| None ->
{ model with Letters = Local Map.empty }
| Remote letters ->
{ model with Letters = Local letters }
| Local _ ->
{ model with Letters = None }
let withToggledRemoterLetters model =
match model.Letters with
| None ->
{ model with Letters = Remote Map.empty }
| Remote _ ->
{ model with Letters = None }
| Local letters ->
{ model with Letters = Remote letters }
let withLetterString letterString model =
match model.LetterString with
| Show _ ->
{ model with LetterString = Show letterString }
| Edit _ ->
{ model with LetterString = Edit letterString }
let withEditLetterString model =
match model.LetterString with
| Show letterString ->
{ model with LetterString = Edit letterString }
| Edit _ ->
{ model with
Letters = None
}
let withEditedLetterString letterString model =
match model.LetterString with
| Show letterString ->
model
| Edit _ ->
{ model with LetterString = Edit letterString }
let withShowLetterString letterString model =
{ model with LetterString = Show letterString }
let update (model : Model) (msg : Msg) : Model =
match msg with
| EditLetterStringRequested ->
model |> withEditLetterString
| EditLetterStringDone letterString ->
model |> withShowLetterString letterString
| LetterStringEdited letterString ->
model |> withEditedLetterString letterString
| ToggleLetters ->
model |> withToggledLetters
| ToggleRemoteLetters ->
model |> withToggledRemoterLetters
| RemoteMsg (Shared.LetterStringChanged letterString) ->
model |> withLetterString letterString
| RemoteMsg (Shared.Letter (index, pos)) ->
match model.Letters with
| Remote letters ->
{ model with Letters = Remote <| letters.Add (index, pos) }
| _ -> model
| Letter (index, pos) ->
match model.Letters with
| Local letters ->
{ model with Letters = Local <| letters.Add (index, pos) }
| _ -> model
let offsetX x i =
(int x) + i * 10 + 15
let drawLetters letters = [
[
for KeyValue(i, pos) in letters do
Html.span [
prop.key (string i)
prop.style [ style.top (int pos.Y)
style.left (offsetX pos.X i)
style.position.fixedRelativeToWindow ]
prop.text pos.Letter
]
] |> ofList
]
let viewLetters model =
Html.div [
prop.style [ style.fontFamily "Consolas, monospace"; style.fontWeight 700; style.height 100 ]
prop.children [
match model.Letters with
| None ->
Html.none
| Local letters ->
yield! drawLetters letters
| Remote letters ->
yield! drawLetters letters
]
]
let letterSubscription model =
match model.Letters with
| Local _ -> true
| _ -> false
let letterSubscriptionOverWebsockets model =
match model.Letters with
| Remote _ -> true
| _ -> false
let viewStatus dispatch model =
Bulma.table [
table.isHoverable
table.isStriped
prop.children [
Html.thead [
Html.tr [
Html.th "Feature"
Html.th "Active"
]
]
Html.tbody [
Html.tr [
Html.td "Letters"
Html.td [
Bulma.input.checkbox [
prop.isChecked (letterSubscription model)
prop.id "letters"
prop.onChange (fun (_: bool) -> dispatch ToggleLetters)
]
]
]
Html.tr [
Html.td "Letters (string and position) over Websockets"
Html.td [
Bulma.input.checkbox [
prop.isChecked (letterSubscriptionOverWebsockets model)
prop.id "remoteLetters"
prop.onChange (fun (_: bool) -> dispatch ToggleRemoteLetters)
]
]
]
]
]
]
let viewLetterString letterString dispatch =
match letterString with
| Show letterString ->
Html.div [
Html.text letterString
Html.text " "
Bulma.button.a [
color.isPrimary
prop.onClick (fun _ -> dispatch EditLetterStringRequested)
prop.text "Edit"
]
]
| Edit letterString ->
Html.div [
Bulma.field.div [
field.isGrouped
prop.children [
Bulma.control.div [
Bulma.input.text [
prop.placeholder "Magic String"
prop.defaultValue letterString
prop.onChange (fun (event: Browser.Types.Event) -> !!event.target?value |> LetterStringEdited |> dispatch)
]
]
Bulma.control.div [
Bulma.button.a [
color.isPrimary
prop.onClick (fun _ -> dispatch <| EditLetterStringDone letterString)
prop.text "Submit"
]
]
]
]
]
let view model dispatch =
Html.div [
prop.style [ style.border(1, borderStyle.dashed, color.black); style.margin 20; style.padding 20 ]
prop.children [
Bulma.title.h3 "Magic Component"
Bulma.subtitle.h4 "Magic String over websockets (when activated)"
Bulma.columns [
Bulma.column [
viewLetterString model.LetterString dispatch
]
Bulma.column []
]
Bulma.columns [
Bulma.column [
viewStatus dispatch model
]
]
Bulma.columns [
Bulma.column [
viewLetters model
]
]
]
]
// Create timefiles stream of letter string
let letterStream letterString =
letterString
|> Seq.toList // Split into list of characters
|> Seq.mapi (fun i c -> i, c) // Create a tuple with the index
|> AsyncRx.ofSeq // Make this an observable
|> AsyncRx.flatMap (fun (i, letter) ->
AsyncRx.ofMouseMove ()
|> AsyncRx.delay (100 * i)
|> AsyncRx.requestAnimationFrame
|> AsyncRx.map (fun ev -> (i, { Letter = string letter; X = ev.clientX; Y = ev.clientY }))
)
let extractedLetterString letterString =
match letterString with
| Show letterString -> letterString
| Edit _ -> ""
let stream model msgs =
match model.Letters with
| Local _ ->
let letterString =
model.LetterString |> extractedLetterString
letterString
|> letterStream
|> AsyncRx.map Letter
|> AsyncRx.merge msgs
|> AsyncRx.tag (letterString + "_local")
| Remote _ ->
let stringQuery =
msgs
|> AsyncRx.choose (function | EditLetterStringDone letterString -> Some letterString | _ -> Option.None)
let letterStringQuery =
stringQuery
|> AsyncRx.map LetterStringChanged
let remote =
stringQuery
|> AsyncRx.startWith [model.LetterString |> extractedLetterString]
|> AsyncRx.flatMapLatest letterStream
|> AsyncRx.map Shared.Msg.Letter
|> AsyncRx.merge letterStringQuery
|> server
// |> AsyncRx.retry 10
|> AsyncRx.map RemoteMsg
remote
|> AsyncRx.merge msgs
|> AsyncRx.tag "_remote"
| _ ->
msgs
|> AsyncRx.tag "msgs"
let magic initialString =
let initialModel = init initialString
Reaction.StreamView initialModel view update stream