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Client.fs
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Client.fs
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namespace fsadvent
open WebSharper
open WebSharper.JavaScript
open WebSharper.UI
open WebSharper.UI.Client
open WebSharper.UI.Templating
[<JavaScript>]
module Client =
type IndexTemplate = Template<"wwwroot/index.html", ClientLoad.FromDocument>
let mutable WIDTH = 600.
let mutable HEIGHT = 600.
let animationHandle : Var<JS.Handle option> = Var.Create None
type Dart =
| Triple of int
| Double of int
| Single of int
| Nil
static member AsScore (d: Dart) =
match d with
| Triple v -> 3*v
| Double v -> 2*v
| Single v -> v
| Nil -> 0
static member AsDartNotation (d: Dart) =
match d with
| Triple v -> sprintf "T%d" v
| Double v -> if v = 25 then "Bull" else sprintf "D%d" v
| Single v -> sprintf "%d" v
| Nil -> ""
static member IsCheckout (d: Dart) =
match d with
| Double _ -> true
| _ -> false
type DartsSet = Dart * Dart * Dart
let PrettyPrintDartsSet (d : DartsSet option) =
match d with
| Some (d1, Nil, Nil) ->
sprintf "%s"
(Dart.AsDartNotation d1)
| Some (d1, d2, Nil) ->
sprintf "%s - %s"
(Dart.AsDartNotation d1)
(Dart.AsDartNotation d2)
| Some (d1, d2, d3) ->
sprintf "%s - %s - %s"
(Dart.AsDartNotation d1)
(Dart.AsDartNotation d2)
(Dart.AsDartNotation d3)
| _ -> "None"
let scoringValues =
[
for i in 1..20 do
(Triple i)
(Double i)
(Single i)
(Single 25)
(Double 25)
Nil
]
|> List.groupBy Dart.AsScore
|> Map.ofList
// Calculate all combinations for a given number between 1 and 180
let getCombinationsFor (numberToReach: int) (isItCheckout: bool) =
scoringValues.Keys
|> List.ofSeq
|> List.choose (fun key ->
if key = 0 && numberToReach <> 0 then
None
else if numberToReach - key < 0 then
None
else
if isItCheckout && numberToReach - key = 0 && key % 2 = 0 then
Some (key, numberToReach - key)
else if isItCheckout && numberToReach - key = 0 then
None
else
Some (key, numberToReach - key)
)
|> List.collect (fun (v1, remainder) ->
scoringValues.Keys
|> List.ofSeq
|> List.choose (fun key ->
if key = 0 && remainder <> 0 then
None
else if remainder - key < 0 then
None
else
if remainder - key = 0 && isItCheckout && key % 2 = 0 then
Some (v1, key, remainder - key)
else if remainder - key = 0 && isItCheckout then
None
else
if scoringValues.ContainsKey (remainder - key) && (not isItCheckout || (remainder - key) % 2 = 0) then
Some (v1, key, remainder - key)
else
None
)
)
|> List.collect (fun (d1, d2, d3) ->
let getFilteredByCheckout (items: Dart list) =
if isItCheckout then
items |> List.filter Dart.IsCheckout
else
items
match scoringValues.TryGetValue(d1), scoringValues.TryGetValue(d2), scoringValues.TryGetValue(d3) with
| (true, items1), (true, [Nil]), (true, [Nil]) ->
getFilteredByCheckout items1 |> List.map (fun x -> Some (x, Nil, Nil))
| (true, items1), (true, items2), (true, [Nil]) ->
items1 |> List.collect (fun x -> getFilteredByCheckout items2 |> List.map (fun y -> Some (x, y, Nil)))
| (true, items1), (true, items2), (true, items3) ->
items1 |> List.collect (fun x -> items2 |> List.collect (fun y -> getFilteredByCheckout items3 |> List.map (fun z -> Some (x, y, z))))
| _ -> []
)
|> List.sortBy (fun (Some (a, b, _)) -> a, b)
let resetBoard (ctx: CanvasRenderingContext2D) =
ctx.ClearRect(0., 0., WIDTH, HEIGHT)
let renderCircle (ctx: CanvasRenderingContext2D) radius color =
ctx.BeginPath();
ctx.Arc(WIDTH/2., HEIGHT/2., radius, 0, 2. * Math.PI, false)
ctx.LineWidth <- 1.
ctx.StrokeStyle <- color
ctx.FillStyle <- color
ctx.Fill()
ctx.Stroke()
let convertToRadian (deg: int) =
(float deg) * Math.PI / 180.
let renderSector (ctx: CanvasRenderingContext2D) radius color (nth: int) =
let beginDeg = (-99 + nth * 18) // We are starting to render from the value of 20 clockwise
let beginRad = convertToRadian beginDeg
let endRad = convertToRadian (beginDeg + 18)
ctx.BeginPath();
ctx.MoveTo(WIDTH/2., HEIGHT/2.)
ctx.Arc(WIDTH/2., HEIGHT/2., radius, beginRad, endRad, false)
ctx.LineWidth <- 1.
ctx.StrokeStyle <- color
ctx.LineTo(WIDTH/2., HEIGHT/2.)
ctx.FillStyle <- color
ctx.Fill()
ctx.Stroke()
let dartRingNumbers =
[
20; 1; 18; 4; 13; 6; 10; 15; 2; 17; 3; 19; 7; 16; 8; 11; 14; 9; 12; 5
]
let renderLabel (ctx: CanvasRenderingContext2D) (num: int) (nth: int) =
ctx.Save()
ctx.StrokeStyle <- "white"
ctx.FillStyle <- "white"
ctx.Font <- "30px Arial"
ctx.TextAlign <- CanvasTextAlign.Center
ctx.Translate(WIDTH/2., HEIGHT/2.)
// The second quadrant should match the orientation of the fourth one
if nth > 5 && nth < 10 then
ctx.Rotate(convertToRadian ((20 + nth - 10) * 18))
// 3 should match the orientation of 20
else if nth = 10 then
ctx.Rotate(convertToRadian 0)
// The third quadrant should match the orientation of the first one
else if nth > 10 && nth < 15 then
ctx.Rotate(convertToRadian ((nth - 10) * 18))
else
ctx.Rotate(convertToRadian (nth * 18))
//ctx.Rotate(convertToRadian (nth * 18))
ctx.FillText(string num, 0, if nth > 5 && nth < 15 then HEIGHT/2. * 0.85 + 15. else - HEIGHT/2. * 0.85);
ctx.Restore();
let drawDartboard (ctx: CanvasRenderingContext2D) (dartToHighlight: Dart) =
// Init board
let hightlightColor = "#61bff9"
resetBoard ctx
let radius = WIDTH/2. - 10.
let scoringRadius = (radius * 0.75)
// Render outer circle
renderCircle ctx radius "#11191f"
for (index, num) in dartRingNumbers |> List.indexed do
let doubleColor =
match dartToHighlight with
| Double v when num = v -> hightlightColor
| _ -> if index % 2 = 0 then "#e63322" else "#389536"
let tripleColor =
match dartToHighlight with
| Triple v when num = v -> hightlightColor
| _ -> if index % 2 = 0 then "#e63322" else "#389536"
let normalColor =
match dartToHighlight with
| Single v when num = v -> hightlightColor
| _ -> if index % 2 = 0 then "#171918" else "#f7e0b6"
// draw double point ring
renderSector ctx (scoringRadius) doubleColor index
// draw normal ring
renderSector ctx (scoringRadius * 0.953) normalColor index
// draw triple point ring
renderSector ctx (scoringRadius * 0.694) tripleColor index
// draw inner normal ring
renderSector ctx (scoringRadius * 0.629) normalColor index
// draw label
renderLabel ctx num index
let colorSmallBull = if dartToHighlight = Single 25 then hightlightColor else "#389536"
let colorBigBull = if dartToHighlight = Double 25 then hightlightColor else "#e63322"
// draw small bullseye
renderCircle ctx (scoringRadius * 0.094) colorSmallBull
// draw bullseye
renderCircle ctx (scoringRadius * 0.037) colorBigBull
let highlightDartboard (ctx: CanvasRenderingContext2D) (currentSelection: DartsSet option) =
match currentSelection with
| None ->
drawDartboard ctx Nil
| Some (d1, d2, d3) ->
let mutable step = 1
let highlightAnimation () =
JS.Document.QuerySelector("span.highlighted") |> fun x -> if x !==. null then x.ClassList.Remove("highlighted")
let dartToUse =
if step = 1 then
d1
else if step = 2 then
d2
else
d3
drawDartboard ctx dartToUse
// highlight matching result field
JS.Document.GetElementById("dart" + string step).ClassList.Add("highlighted")
if step = 3 then
step <- 1
else
step <- step + 1
animationHandle.Set (Some <| JS.SetInterval highlightAnimation 1000 )
[<SPAEntryPoint>]
let Main () =
let selected = Var.Create None
let numberToReach = Var.Create 1
let isItCheckout = Var.Create false
let results = Var.Create [None]
IndexTemplate.Main()
.CanvasAttr(
[
on.viewUpdate selected.View (fun elem currentSelection ->
animationHandle.View
|> View.Get (fun handle ->
match handle with
| None -> ()
| Some handle ->
JS.ClearInterval handle
JS.Document.QuerySelector("span.highlighted") |> fun x -> if x !==. null then x.ClassList.Remove("highlighted")
animationHandle.Set None
)
let canvasElement = As<CanvasElement> elem
let context = canvasElement.GetContext("2d")
highlightDartboard context currentSelection
)
on.afterRender (fun elem ->
let canvasElement = As<CanvasElement> elem
WIDTH <- canvasElement.Width
HEIGHT <- canvasElement.Width
canvasElement.Height <- int HEIGHT
let context = canvasElement.GetContext("2d")
drawDartboard context Nil
)
]
)
.IsItCheckout(isItCheckout)
.SelectedNumber(numberToReach)
.Selected1(selected.View.Map(function None -> "" | Some (d1, _, _) -> Dart.AsDartNotation d1))
.Selected2(selected.View.Map(function None -> "" | Some (_, d2, _) -> Dart.AsDartNotation d2))
.Selected3(selected.View.Map(function None -> "" | Some (_, _, d3) -> Dart.AsDartNotation d3))
.Calculate(fun te ->
numberToReach.View
|> View.Get (fun number ->
isItCheckout.View
|> View.Get (fun checkout ->
animationHandle.View
|> View.Get (fun handle ->
match handle with
| None -> ()
| Some handle ->
JS.ClearInterval handle
animationHandle.Set None
)
let res = getCombinationsFor number checkout
if res.Length = 0 then
JS.Alert <| sprintf "%d cannot be reached with 3 darts! Please try a different number." number
results.Set (None::res)
if res.Length > 1 then
res |> List.head |> selected.Set
else
selected.Set None
)
)
)
.SelectionBox(
results.View
|> Doc.BindView (fun options ->
Doc.InputType.Select [] PrettyPrintDartsSet options selected
)
)
.Doc()
|> Doc.RunById "main"