Get topics for consumer group

lib/kafkaex_lag_exporter/topic_name_parser.ex

@@ -0,0 +1,13 @@
+defmodule KafkaexLagExporter.TopicNameParser do
+  @moduledoc "Parse Kafka internal member assignment payload in order to find which topics belong to the consumer group"
+
+  @invalid_topic_characters ~r/[^[:alnum:]\-\._]/
+
+  def parse_topic_names(member_assignment) do
+    member_assignment
+    |> String.chunk(:printable)
+    |> Enum.drop(1)
+    |> Enum.take_every(2)
+    |> Enum.map(fn topic_name -> Regex.replace(@invalid_topic_characters, topic_name, "") end)
+  end
+end