find_all_plugins() for listing actual plugins

lib/service/discord.ex

@@ -107,7 +107,7 @@ defmodule Service.Discord do
 
     [
       "Message from ",
-      msg.author_id |> Nostrum.Struct.User.full_name() |> inspect(),
+      msg.author_id |> Nostrum.Api.get_user!() |> Nostrum.Struct.User.full_name() |> inspect(),
       " lead to ",
       error_type,
       " in plugin ",
@@ -145,7 +145,9 @@ defmodule Service.Discord do
         "Erlang-level error ",
         inspect(level),
         "\n",
-        message |> S.pp() |> Service.Discord.txt_format(:source_block)
+        message
+        |> TxtBlock.to_str_list(Service.Discord)
+        |> Service.Discord.txt_format(:source_block)
       ]
 
       _ = send_msg(channel_id, log)

lib/stampede.ex

@@ -80,11 +80,26 @@ defmodule Stampede do
     :code.all_available()
     |> Enum.map(&(elem(&1, 0) |> to_string))
     |> Enum.filter(&String.starts_with?(&1, to_string(module_name) <> "."))
-    |> Enum.sort()
     |> Enum.map(&String.to_atom/1)
     |> MapSet.new()
   end
 
+  def find_all_plugins() do
+    find_submodules(Plugin)
+    |> Enum.reduce(MapSet.new(), fn
+      mod, acc ->
+        b =
+          apply(mod, :__info__, [:attributes])
+          |> Keyword.get(:behaviour, [])
+
+        if Plugin in b do
+          MapSet.put(acc, mod)
+        else
+          acc
+        end
+    end)
+  end
+
   @doc """
   If passed a text prefix, will match the start of the string. If passed a
   regex, it will match whatever was given and return the first match group.

lib/stampede/interaction.ex

@@ -8,7 +8,7 @@ defmodule Stampede.Interaction do
     plugin: _ :: any(),
     msg: _ :: Msg,
     response: _ :: Response,
-    traceback: [] :: iodata() | String.t(),
+    traceback: [] :: TxtBlock.t(),
     channel_lock: false :: S.channel_lock_action()
   )