1 files changed, 26 insertions, 6 deletions

diff --git a/lib/irc/parser/isupport.ex b/lib/irc/parser/isupport.ex
index 9dd7f30..dda4220 100644
--- a/lib/irc/parser/isupport.ex
+++ b/lib/irc/parser/isupport.ex
@@ -1,8 +1,17 @@
 defmodule Irc.Parser.Isupport do
   @moduledoc """
-  ISUPPORT list parser
+  ISUPPORT list parser.
   """
 
+  @typedoc "Server ISUPPORT."
+  @type t :: %{key => value}
+  @type key :: String.t
+  @type value :: true | Integer.t() | Map.t() | prefix_map
+
+  @type prefix :: String.t()
+  @type mode :: String.t()
+  @type prefix_map :: %{prefix() => mode()}
+
   def parse(list, acc \\ %{}) do
     list = List.flatten(list)
     Enum.reduce(list, acc, fn(entry, acc) ->
@@ -13,25 +22,36 @@ defmodule Irc.Parser.Isupport do
           else
             Map.put(acc, entry, true)
           end
-        [entry, value] -> Map.put(acc, entry, parse_value(value))
+        [entry, value] -> Map.put(acc, entry, parse_value(entry, value))
       end
     end)
   end
 
-  defp parse_value(value) do
+  defp parse_value(entry, value) do
     if String.contains?(value, ":") do
       Enum.reduce(String.split(value, ","), %{}, fn(key_and_value, acc) ->
         case String.split(key_and_value, ":", parts: 2) do
           [key] -> Map.put(acc, key, nil)
-          [key, value] -> Map.put(acc, key, format_value(value))
+          [key, value] -> Map.put(acc, key, format_value(key, value))
         end
       end)
     else
-        format_value(value)
+        format_value(entry, value)
+    end
+  end
+
+  def format_value("PREFIX", value) do
+    case String.split(value, ")", parts: 2) do
+      ["("<>modes, prefixes] ->
+        modes = String.split(modes, "", trim: true)
+        prefixes = String.split(prefixes, "", trim: true)
+        Enum.reduce(Enum.with_index(modes), %{}, fn({mode, position}, acc) ->
+          Map.put(acc, Enum.at(prefixes, position), mode)
+        end)
     end
   end
 
-  def format_value(value) do
+  def format_value(key, value) do
     case Integer.parse(value) do
       {i, ""} -> i
       _ -> value