git.squeep.com Git - akkoma/blob - lib/pleroma/web/chat_channel.ex

   1 defmodule Pleroma.Web.ChatChannel do
   2   use Phoenix.Channel
   3   alias Pleroma.Web.ChatChannel.ChatChannelState
   4   alias Pleroma.User
   5
   6   def join("chat:public", _message, socket) do
   7     send(self(), :after_join)
   8     {:ok, socket}
   9   end
  10
  11   def handle_info(:after_join, socket) do
  12     push socket, "messages", %{messages: ChatChannelState.messages()}
  13     {:noreply, socket}
  14   end
  15
  16   def handle_in("new_msg", %{"text" => text}, %{assigns: %{user_name: user_name}} = socket) do
  17     author = User.get_cached_by_nickname(user_name)
  18     author = Pleroma.Web.MastodonAPI.AccountView.render("account.json", user: author)
  19     message = ChatChannelState.add_message(%{text: text, author: author})
  20
  21     broadcast! socket, "new_msg", message
  22     {:noreply, socket}
  23   end
  24 end
  25
  26 defmodule Pleroma.Web.ChatChannel.ChatChannelState do
  27   use Agent
  28   @max_messages 20
  29
  30   def start_link do
  31     Agent.start_link(fn -> %{max_id: 1, messages: []} end, name: __MODULE__)
  32   end
  33
  34   def add_message(message) do
  35     Agent.get_and_update(__MODULE__, fn state ->
  36       id = state[:max_id] + 1
  37       message = Map.put(message, "id", id)
  38       messages = [message | state[:messages]] |> Enum.take(@max_messages)
  39       {message, %{max_id: id, messages: messages}}
  40     end)
  41   end
  42
  43   def messages() do
  44     Agent.get(__MODULE__, fn state -> state[:messages] |> Enum.reverse end)
  45   end
  46 end