First bits of pure lustre-javascript for user login session

server/src/web/components/card.gleam

@@ -0,0 +1,275 @@
+import gleam/erlang/process.{type Subject}
+import gleam/int
+import gleam/list
+import gleam/option.{type Option, None, Some}
+import gleam/otp/actor.{type Started}
+import group_registry.{type GroupRegistry}
+import lustre
+import lustre/attribute.{class}
+import lustre/effect.{type Effect}
+import lustre/element.{type Element}
+import lustre/element/html
+import lustre/server_component
+import shared/message.{type NotifyClient, type NotifyServer, type User, User}
+import web/components/shared.{
+  step_prompt, view_input, view_named_input, view_yes_no,
+}
+
+pub fn component() -> lustre.App(message.ClientsServer, Model, Msg) {
+  lustre.application(init, update, view)
+}
+
+type State {
+  AskName
+  NameOk(String)
+  WaitForQuiz(String)
+  Answer(String)
+}
+
+pub opaque type Model {
+  Model(
+    state: State,
+    lobby: #(String, List(User)),
+    registry: GroupRegistry(NotifyClient),
+    handler: Started(Subject(NotifyServer)),
+  )
+}
+
+fn init(handlers: message.ClientsServer) -> #(Model, Effect(Msg)) {
+  let #(registry, handler) = handlers
+
+  let model = Model(AskName, #("", []), registry, handler)
+  #(model, subscribe(registry, SharedMessage))
+}
+
+fn subscribe(
+  registry: GroupRegistry(topic),
+  on_msg handle_msg: fn(topic) -> msg,
+) -> Effect(msg) {
+  use _, _ <- server_component.select
+  let subject = group_registry.join(registry, "quiz", process.self())
+
+  let selector =
+    process.new_selector()
+    |> process.select_map(subject, handle_msg)
+
+  selector
+}
+
+pub opaque type Msg {
+  SharedMessage(message: NotifyClient)
+  ReceiveName(message: String)
+  AcceptName(accept: Option(String))
+  GiveAnswer(name: String, answer: String)
+}
+
+fn update(model: Model, msg: Msg) -> #(Model, Effect(Msg)) {
+  let handler = model.handler
+
+  case msg {
+    ReceiveName(name) -> #(Model(..model, state: NameOk(name)), effect.none())
+    AcceptName(Some(name)) -> {
+      actor.send(handler.data, message.GiveName(name:))
+      #(Model(..model, state: WaitForQuiz(name)), effect.none())
+    }
+    AcceptName(None) -> #(Model(..model, state: AskName), effect.none())
+    GiveAnswer(name, answer) -> {
+      actor.send(handler.data, message.GiveAnswer(name, Some(answer)))
+      #(Model(..model, state: WaitForQuiz(name)), effect.none())
+    }
+    SharedMessage(shared_msg) -> #(
+      handle_server_message(model, shared_msg),
+      effect.none(),
+    )
+  }
+}
+
+fn handle_server_message(model: Model, notify_client) {
+  case notify_client {
+    message.Lobby(question, lobby) -> Model(..model, lobby: #(question, lobby))
+    message.Exit -> Model(AskName, #("", []), model.registry, model.handler)
+    message.Answer ->
+      case model.state {
+        // We are currently waiting for next quiz question, ok to switch to answer mode
+        WaitForQuiz(name) -> Model(..model, state: Answer(name))
+        // We are not in a state to react, ignore switch to answer mode.
+        _ -> model
+      }
+    message.Await ->
+      case model.state {
+        Answer(name) -> Model(..model, state: WaitForQuiz(name))
+        _ -> model
+      }
+    message.Ping -> {
+      let has_name = case model.state {
+        Answer(name) -> Some(name)
+        WaitForQuiz(name) -> Some(name)
+        _ -> None
+      }
+      case has_name {
+        Some(name) -> actor.send(model.handler.data, message.Pong(name))
+        _ -> Nil
+      }
+      model
+    }
+  }
+}
+
+fn view(model: Model) -> Element(Msg) {
+  let #(question, lobby) = model.lobby
+
+  element.fragment([
+    html.div([attribute.class("terminal-prompt")], [
+      case model.state {
+        AskName ->
+          step_prompt(
+            "Hello stranger. To join the quiz, I need to know your name",
+            fn() { view_input(ReceiveName) },
+          )
+        NameOk(name) ->
+          step_prompt(
+            "Your name is " <> name <> "? Are you absolutely sure???",
+            fn() { view_yes_no(name, AcceptName) },
+          )
+        Answer(name) ->
+          step_prompt(
+            "The Quiz Lead will now ask the question, and you may answer.",
+            fn() { view_named_input(name, GiveAnswer) },
+          )
+        _ -> html.h3([], [html.text("Waiting for next question")])
+      },
+    ]),
+    html.div([class("terminal-header")], [
+      html.div([class("terminal-status")], [
+        html.span([class("status-blink")], [html.text("●")]),
+        html.text(" SYSTEM READY"),
+        html.span([class("ml-8")], [
+          case model.state {
+            AskName -> html.text("STATUS: Please input your name")
+            NameOk(_) -> html.text("STATUS: Please validate your name")
+            Answer(_) ->
+              html.div([], [
+                html.div([], [html.text("STATUS: Answer the following:")]),
+                html.div([], [html.text(question)]),
+              ])
+            _ -> html.text("STATUS: Waiting for next question")
+          },
+        ]),
+      ]),
+    ]),
+    html.div([class("terminal-section")], case lobby {
+      [] -> []
+      lobby -> {
+        let answered =
+          list.filter(lobby, fn(x) {
+            case x.answer {
+              message.IDontKnow | message.HasAnswered | message.GivenAnswer(_) ->
+                True
+              _ -> False
+            }
+          })
+          |> list.length
+          |> int.to_string
+        let size = lobby |> list.length |> int.to_string
+        [
+          html.div([attribute.class("terminal-box")], [
+            html.span([attribute.class("terminal-label")], [
+              html.text("[PROGRESS] "),
+            ]),
+            html.text("Answered: "),
+            case answered == size {
+              True -> html.text("Everyone!")
+              False -> html.text(answered <> "/" <> size)
+            },
+          ]),
+        ]
+      }
+    }),
+    terminal_section(
+      lobby,
+      "[ACTIVE TRANSMISSIONS]",
+      fn(x) {
+        case x.answer {
+          message.GivenAnswer(_) | message.HasAnswered -> True
+          _ -> False
+        }
+      },
+      fn(user) {
+        let User(name, ping_time, answer) = user
+        case answer {
+          message.GivenAnswer(answer) -> answer
+          message.HasAnswered -> "Answer Given"
+          _ -> "Odd State..."
+        }
+        |> content_cell(name, ping_time, _)
+      },
+    ),
+    terminal_section(
+      lobby,
+      "[P A S S]",
+      fn(x) {
+        case x.answer {
+          message.IDontKnow -> True
+          _ -> False
+        }
+      },
+      fn(user) {
+        let User(name, ping_time, _) = user
+        content_cell(name, ping_time, "P.A.S.S :(")
+      },
+    ),
+    terminal_section(
+      lobby,
+      "[AWAITING RESPONSE]",
+      fn(x) {
+        case x.answer {
+          message.NotAnswered -> True
+          _ -> False
+        }
+      },
+      fn(user) {
+        case user {
+          User(name, ping_time, _) ->
+            content_cell(name, ping_time, "Not Answered")
+        }
+      },
+    ),
+  ])
+}
+
+fn terminal_section(
+  lobby: List(User),
+  header: String,
+  filter: fn(User) -> Bool,
+  extract: fn(User) -> Element(Msg),
+) {
+  html.div([attribute.class("terminal-section")], [
+    html.div([attribute.class("terminal-label mb-4")], [
+      html.text(header),
+    ]),
+    html.div(
+      [attribute.class("participants-grid")],
+      list.filter(lobby, filter)
+        |> list.map(extract),
+    ),
+  ])
+}
+
+fn content_cell(header: String, ping_time: Int, content: String) -> Element(Msg) {
+  html.div(
+    [
+      class(case ping_time > 1 {
+        True -> "participant-disconnect"
+        False -> "participant-box"
+      }),
+    ],
+    [
+      html.div([class("participant-name")], [
+        html.text("► " <> header),
+      ]),
+      html.div([class("participant-answer")], [
+        html.text(content),
+      ]),
+    ],
+  )
+}