1 files changed, 130 insertions, 0 deletions
diff --git a/lib/lsg_telegram/room.ex b/lib/lsg_telegram/room.ex
new file mode 100644
index 0000000..f7e42c6
--- /dev/null
+++ b/lib/lsg_telegram/room.ex
@@ -0,0 +1,130 @@
+defmodule LSG.TelegramRoom do
+  require Logger
+  @behaviour Telegram.ChatBot
+  alias Telegram.Api
+
+  def dets() do
+    (LSG.data_path() <> "/telegram-rooms.dets") |> String.to_charlist()
+  end
+
+  def setup() do
+    {:ok, _} = :dets.open_file(dets(), [])
+    :ok
+  end
+
+  def after_start() do
+    rooms = :dets.foldl(fn({id, _, _}, acc) -> [id | acc] end, [], dets())
+    for id <- rooms, do: Telegram.Bot.ChatBot.Chat.Session.Supervisor.start_child(LSG.Telegram, id)
+  end
+
+  @impl Telegram.ChatBot
+  def init(id) do
+    token = Keyword.get(Application.get_env(:lsg, :telegram, []), :key)
+    {:ok, chat} = Api.request(token, "getChat", chat_id: id)
+    Logger.debug("Starting ChatBot for room #{id} \"#{chat["title"]}\"")
+    [net, chan] = String.split(chat["title"], "/", parts: 2)
+    case IRC.Connection.get_network(net, chan) do
+      %IRC.Connection{} ->
+        {:ok, _} = Registry.register(IRC.PubSub, "#{net}/#{chan}:messages", plugin: __MODULE__)
+        {:ok, _} = Registry.register(IRC.PubSub, "#{net}/#{chan}:triggers", plugin: __MODULE__)
+        {:ok, _} = Registry.register(IRC.PubSub, "#{net}/#{chan}:outputs", plugin: __MODULE__)
+      err ->
+        Logger.warn("Did not found telegram match for #{id} \"#{chat["title"]}\"")
+    end
+    :dets.insert(dets(), {id, net, chan})
+    {:ok, %{id: id, net: net, chan: chan}}
+  end
+
+  def handle_update(%{"message" => %{"from" => %{"id" => user_id}, "text" => text}}, _token, state) do
+    account = IRC.Account.find_meta_account("telegram-id", user_id)
+    connection = IRC.Connection.get_network(state.net)
+    IRC.send_message_as(account, state.net, state.chan, text, true)
+    {:ok, state}
+  end
+
+  def handle_update(data = %{"message" => %{"from" => %{"id" => user_id}, "location" => %{"latitude" => lat, "longitude" => lon}}}, _token, state) do
+    account = IRC.Account.find_meta_account("telegram-id", user_id)
+    connection = IRC.Connection.get_network(state.net)
+    IRC.send_message_as(account, state.net, state.chan, "@ #{lat}, #{lon}", true)
+    {:ok, state}
+  end
+
+  for type <- ~w(photo voice video document animation) do
+    def handle_update(data = %{"message" => %{unquote(type) => _}}, token, state) do
+      upload(unquote(type), data, token, state)
+    end
+  end
+
+  def handle_update(update, token, state) do
+    {:ok, state}
+  end
+
+  def handle_info({:irc, _, _, message}, state) do
+    handle_info({:irc, nil, message}, state)
+  end
+
+  def handle_info({:irc, _, message = %IRC.Message{sender: %{nick: nick}, text: text}}, state) do
+    if Map.get(message.meta, :from) == self() do
+    else
+      body = if Map.get(message.meta, :self), do: text, else: "<#{nick}> #{text}"
+      LSG.Telegram.send_message(state.id, body)
+    end
+    {:ok, state}
+  end
+
+  def handle_info(info, state) do
+    Logger.info("UNhandled #{inspect info}")
+    {:ok, state}
+  end
+
+  defp upload(_type, %{"message" => m = %{"chat" => %{"id" => chat_id}, "from" => %{"id" => user_id}}}, token, state) do
+    account = IRC.Account.find_meta_account("telegram-id", user_id)
+    if account do
+      {content, type} = cond do
+        m["photo"] -> {m["photo"], "photo"}
+        m["voice"] -> {m["voice"], "voice message"}
+        m["video"] -> {m["video"], "video"}
+        m["document"] -> {m["document"], "file"}
+        m["animation"] -> {m["animation"], "gif"}
+      end
+
+      file = if is_list(content) && Enum.count(content) > 1 do
+        Enum.sort_by(content, fn(p) -> p["file_size"] end, &>=/2)
+        |> List.first()
+      else
+        content
+      end
+
+      file_id = file["file_id"]
+      file_unique_id = file["file_unique_id"]
+      text = if(m["caption"], do: m["caption"] <> " ", else: "")
+
+      spawn(fn() ->
+        with \
+          {:ok, file} <- Telegram.Api.request(token, "getFile", file_id: file_id),
+          path = "https://api.telegram.org/file/bot#{token}/#{file["file_path"]}",
+          {:ok, %HTTPoison.Response{status_code: 200, body: body}} <- HTTPoison.get(path),
+          <<smol_body::binary-size(20), _::binary>> = body,
+          {:ok, magic} <- GenMagic.Pool.perform(LSG.GenMagic, {:bytes, smol_body}),
+          bucket = Application.get_env(:lsg, :s3, []) |> Keyword.get(:bucket),
+          ext = Path.extname(file["file_path"]),
+          s3path = "#{account.id}/#{file_unique_id}#{ext}",
+          s3req = ExAws.S3.put_object(bucket, s3path, body, acl: :public_read, content_type: magic.mime_type),
+          {:ok, _} <- ExAws.request(s3req)
+        do
+          path = LSGWeb.Router.Helpers.url(LSGWeb.Endpoint) <> "/files/#{s3path}"
+          txt = "#{type}: #{text}#{path}"
+          connection = IRC.Connection.get_network(state.net)
+          IRC.send_message_as(account, state.net, state.chan, txt, true)
+        else
+          error ->
+            Telegram.Api.request(token, "sendMessage", chat_id: chat_id, text: "File upload failed, sorry.")
+            Logger.error("Failed upload from Telegram: #{inspect error}")
+        end
+      end)
+
+      {:ok, state}
+    end
+  end
+
+end