git.squeep.com Git - akkoma/blob - lib/pleroma/bbs/handler.ex

   1 defmodule Pleroma.BBS.Handler do
   2   @moduledoc """
   3   An example implementation of `Sshd.ShellHandler`, implementing a very simple
   4   Read-Eval-Loop, that does nothing.
   5   """
   6   use Sshd.ShellHandler
   7   alias Pleroma.Web.CommonAPI
   8   alias Pleroma.Web.ActivityPub.ActivityPub
   9   alias Pleroma.Activity
  10
  11   def on_shell(username, _pubkey, _ip, _port) do
  12     :ok = IO.puts("Welcome to #{Pleroma.Config.get([:instance, :name])}!")
  13     user = Pleroma.User.get_by_nickname(to_string(username))
  14     Logger.debug("#{inspect(user)}")
  15     loop(run_state(user: user))
  16   end
  17
  18   def on_connect(username, ip, port, method) do
  19     Logger.debug(fn ->
  20       """
  21       Incoming SSH shell #{inspect(self())} requested for #{username} from #{inspect(ip)}:#{
  22         inspect(port)
  23       } using #{inspect(method)}
  24       """
  25     end)
  26   end
  27
  28   def on_disconnect(username, ip, port) do
  29     Logger.debug(fn ->
  30       "Disconnecting SSH shell for #{username} from #{inspect(ip)}:#{inspect(port)}"
  31     end)
  32   end
  33
  34   defp loop(state) do
  35     self_pid = self()
  36     counter = state.counter
  37     prefix = state.prefix
  38     user = state.user
  39
  40     input = spawn(fn -> io_get(self_pid, prefix, counter, user.nickname) end)
  41     wait_input(state, input)
  42   end
  43
  44   def puts_activity(activity) do
  45     status = Pleroma.Web.MastodonAPI.StatusView.render("status.json", %{activity: activity})
  46     IO.puts("-- #{status.id} by #{status.account.display_name} (#{status.account.acct})")
  47     IO.puts(HtmlSanitizeEx.strip_tags(status.content))
  48     IO.puts("")
  49   end
  50
  51   def handle_command(state, "help") do
  52     IO.puts("Available commands:")
  53     IO.puts("help - This help")
  54     IO.puts("home - Show the home timeline")
  55     IO.puts("p <text> - Post the given text")
  56     IO.puts("r <id> <text> - Reply to the post with the given id")
  57     IO.puts("quit - Quit")
  58
  59     state
  60   end
  61
  62   def handle_command(%{user: user} = state, "r " <> text) do
  63     text = String.trim(text)
  64     [activity_id, rest] = String.split(text, " ", parts: 2)
  65
  66     with %Activity{} <- Activity.get_by_id(activity_id),
  67          {:ok, _activity} <-
  68            CommonAPI.post(user, %{"status" => rest, "in_reply_to_status_id" => activity_id}) do
  69       IO.puts("Replied!")
  70     else
  71       _e -> IO.puts("Could not reply...")
  72     end
  73
  74     state
  75   end
  76
  77   def handle_command(%{user: user} = state, "p " <> text) do
  78     text = String.trim(text)
  79
  80     with {:ok, _activity} <- CommonAPI.post(user, %{"status" => text}) do
  81       IO.puts("Posted!")
  82     else
  83       _e -> IO.puts("Could not post...")
  84     end
  85
  86     state
  87   end
  88
  89   def handle_command(state, "home") do
  90     user = state.user
  91
  92     params =
  93       %{}
  94       |> Map.put("type", ["Create", "Announce"])
  95       |> Map.put("blocking_user", user)
  96       |> Map.put("muting_user", user)
  97       |> Map.put("user", user)
  98
  99     activities =
 100       [user.ap_id | user.following]
 101       |> ActivityPub.fetch_activities(params)
 102       |> ActivityPub.contain_timeline(user)
 103       |> Enum.reverse()
 104
 105     Enum.each(activities, fn activity ->
 106       puts_activity(activity)
 107     end)
 108
 109     state
 110   end
 111
 112   def handle_command(_state, command) do
 113     IO.puts("Unknown command '#{command}'")
 114   end
 115
 116   defp wait_input(state, input) do
 117     receive do
 118       {:input, ^input, "quit\n"} ->
 119         IO.puts("Exiting...")
 120
 121       {:input, ^input, code} when is_binary(code) ->
 122         code = String.trim(code)
 123
 124         state = handle_command(state, code)
 125
 126         loop(%{state | counter: state.counter + 1})
 127
 128       {:error, :interrupted} ->
 129         IO.puts("Caught Ctrl+C...")
 130         loop(%{state | counter: state.counter + 1})
 131
 132       {:input, ^input, msg} ->
 133         :ok = Logger.warn("received unknown message: #{inspect(msg)}")
 134         loop(%{state | counter: state.counter + 1})
 135     end
 136   end
 137
 138   defp run_state(opts) do
 139     %{prefix: "pleroma", counter: 1, user: opts[:user]}
 140   end
 141
 142   defp io_get(pid, prefix, counter, username) do
 143     prompt = prompt(prefix, counter, username)
 144     send(pid, {:input, self(), IO.gets(:stdio, prompt)})
 145   end
 146
 147   defp prompt(prefix, counter, username) do
 148     prompt = "#{username}@#{prefix}:#{counter}>"
 149     prompt <> " "
 150   end
 151 end