106 lines
2.3 KiB
Elixir
106 lines
2.3 KiB
Elixir
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defmodule RanchTalk.TalkTimer do
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use Kino.JS
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use Kino.JS.Live
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require Logger
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defmodule Opts do
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@ten_minutes_in_seconds 60 * 10
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defstruct done_message: "Timer finished!",
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seconds_to_count: @ten_minutes_in_seconds
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end
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@default_opts %{
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done_message: "Timer finished!",
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seconds_to_count: 600
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}
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@spec new(opts :: Opts.t()) :: Kino.JS.Live.t()
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def new(opts) do
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state =
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@default_opts
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|> Map.merge(opts)
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|> update_state_html()
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Kino.JS.Live.new(__MODULE__, state)
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end
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def set_html(widget, html) do
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Kino.JS.Live.cast(widget, {:set_html, html})
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end
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def get_state(widget) do
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Kino.JS.Live.call(widget, :get_state)
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end
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@impl true
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def init(state, ctx) do
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{:ok, assign(ctx, state)}
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end
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def tick(widget) do
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state = get_state(widget)
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tick(widget, state)
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end
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def tick(widget, %{seconds_to_count: seconds_to_count, done_message: done_message} = state) do
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if seconds_to_count < 1 do
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set_html(widget, done_message)
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Kino.JS.Live.cast(widget, :timer_finished)
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else
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new_state =
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state
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|> Map.put(:seconds_to_count, seconds_to_count - 1)
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|> update_state_html()
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set_html(widget, state.html)
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Process.sleep(1000)
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tick(widget, new_state)
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end
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end
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@impl true
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def handle_connect(ctx) do
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{:ok, ctx.assigns, ctx}
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end
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@impl true
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def handle_cast({:set_html, html}, ctx) do
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broadcast_event(ctx, "set_html", html)
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{:noreply, assign(ctx, html: html)}
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end
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@impl true
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def handle_cast(:timer_finished, ctx) do
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broadcast_event(ctx, "timer_finished", ctx.assigns.done_message)
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{:noreply, ctx}
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end
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@impl true
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def handle_call(:get_state, _from, ctx) do
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{:reply, ctx.assigns, ctx}
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end
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def start(widget) do
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spawn(fn -> tick(widget) end)
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widget
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end
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defp update_state_html(%{seconds_to_count: seconds} = state) do
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minutes = seconds |> div(60) |> to_string()
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seconds = seconds |> rem(60) |> to_string() |> String.pad_leading(2, "0")
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Map.put(state, :html, Enum.join([minutes, ":", seconds]))
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end
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asset "main.js" do
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"""
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export function init(ctx, state) {
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ctx.root.innerHTML = state.html;
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ctx.handleEvent("set_html", html => ctx.root.innerHTML = html)
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ctx.handleEvent("timer_finished", message => alert(message))
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}
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"""
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end
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end
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