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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.BBS.Handler do
use Sshd.ShellHandler
alias Pleroma.Activity
alias Pleroma.HTML
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.CommonAPI
def on_shell(username, _pubkey, _ip, _port) do
:ok = IO.puts("Welcome to #{Pleroma.Config.get([:instance, :name])}!")
user = Pleroma.User.get_cached_by_nickname(to_string(username))
Logger.debug("#{inspect(user)}")
loop(run_state(user: user))
end
def on_connect(username, ip, port, method) do
Logger.debug(fn ->
"""
Incoming SSH shell #{inspect(self())} requested for #{username} from #{inspect(ip)}:#{inspect(port)} using #{inspect(method)}
"""
end)
end
def on_disconnect(username, ip, port) do
Logger.debug(fn ->
"Disconnecting SSH shell for #{username} from #{inspect(ip)}:#{inspect(port)}"
end)
end
defp loop(state) do
self_pid = self()
counter = state.counter
prefix = state.prefix
user = state.user
input = spawn(fn -> io_get(self_pid, prefix, counter, user.nickname) end)
wait_input(state, input)
end
def puts_activity(activity) do
status = Pleroma.Web.MastodonAPI.StatusView.render("show.json", %{activity: activity})
IO.puts("-- #{status.id} by #{status.account.display_name} (#{status.account.acct})")
IO.puts(HTML.strip_tags(status.content))
IO.puts("")
end
def handle_command(state, "help") do
IO.puts("Available commands:")
IO.puts("help - This help")
IO.puts("home - Show the home timeline")
IO.puts("p <text> - Post the given text")
IO.puts("r <id> <text> - Reply to the post with the given id")
IO.puts("quit - Quit")
state
end
def handle_command(%{user: user} = state, "r " <> text) do
text = String.trim(text)
[activity_id, rest] = String.split(text, " ", parts: 2)
with %Activity{} <- Activity.get_by_id(activity_id),
{:ok, _activity} <-
CommonAPI.post(user, %{status: rest, in_reply_to_status_id: activity_id}) do
IO.puts("Replied!")
else
_e -> IO.puts("Could not reply...")
end
state
end
def handle_command(%{user: user} = state, "p " <> text) do
text = String.trim(text)
with {:ok, _activity} <- CommonAPI.post(user, %{status: text}) do
IO.puts("Posted!")
else
_e -> IO.puts("Could not post...")
end
state
end
def handle_command(state, "home") do
user = state.user
params =
%{}
|> Map.put(:type, ["Create"])
|> Map.put(:blocking_user, user)
|> Map.put(:muting_user, user)
|> Map.put(:user, user)
activities =
[user.ap_id | Pleroma.User.following(user)]
|> ActivityPub.fetch_activities(params)
Enum.each(activities, fn activity ->
puts_activity(activity)
end)
state
end
def handle_command(state, command) do
IO.puts("Unknown command '#{command}'")
state
end
defp wait_input(state, input) do
receive do
{:input, ^input, "quit\n"} ->
IO.puts("Exiting...")
{:input, ^input, code} when is_binary(code) ->
code = String.trim(code)
state = handle_command(state, code)
loop(%{state | counter: state.counter + 1})
{:error, :interrupted} ->
IO.puts("Caught Ctrl+C...")
loop(%{state | counter: state.counter + 1})
{:input, ^input, msg} ->
:ok = Logger.warn("received unknown message: #{inspect(msg)}")
loop(%{state | counter: state.counter + 1})
end
end
defp run_state(opts) do
%{prefix: "pleroma", counter: 1, user: opts[:user]}
end
defp io_get(pid, prefix, counter, username) do
prompt = prompt(prefix, counter, username)
send(pid, {:input, self(), IO.gets(:stdio, prompt)})
end
defp prompt(prefix, counter, username) do
prompt = "#{username}@#{prefix}:#{counter}>"
prompt <> " "
end
end
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