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     text = String.trim(text)
  18     if String.length(text) > 0 do
  19       author = User.get_cached_by_nickname(user_name)
  20       author = Pleroma.Web.MastodonAPI.AccountView.render("account.json", user: author)
  21       message = ChatChannelState.add_message(%{text: text, author: author})
  22
  23       broadcast! socket, "new_msg", message
  24     end
  25     {:noreply, socket}
  26   end
  27 end
  28
  29 defmodule Pleroma.Web.ChatChannel.ChatChannelState do
  30   @max_messages 20
  31
  32   def start_link do
  33     Agent.start_link(fn -> %{max_id: 1, messages: []} end, name: __MODULE__)
  34   end
  35
  36   def add_message(message) do
  37     Agent.get_and_update(__MODULE__, fn state ->
  38       id = state[:max_id] + 1
  39       message = Map.put(message, "id", id)
  40       messages = [message | state[:messages]] |> Enum.take(@max_messages)
  41       {message, %{max_id: id, messages: messages}}
  42     end)
  43   end
  44
  45   def messages() do
  46     Agent.get(__MODULE__, fn state -> state[:messages] |> Enum.reverse end)
  47   end
  48 end