Fix minor actions

lib/kafka_ex.ex

@@ -133,7 +133,7 @@ defmodule KafkaEx do
   def describe_group(consumer_group_name, opts \\ []) do
     worker_name = Keyword.get(opts, :worker_name, Config.default_worker())
 
-    case Server.call(worker_name, {:describe_groups, [consumer_group_name]}) do
+    case Server.call(worker_name, {:describe_groups, [consumer_group_name], opts}) do
       {:ok, [group]} -> {:ok, group}
       {:error, error} -> {:error, error}
     end
@@ -227,8 +227,9 @@ defmodule KafkaEx do
   """
   @spec latest_offset(binary, integer, atom | pid) ::
           [OffsetResponse.t()] | :topic_not_found
-  def latest_offset(topic, partition, name \\ Config.default_worker()),
-    do: offset(topic, partition, :latest, name)
+  def latest_offset(topic, partition, name \\ Config.default_worker()) do
+    offset(topic, partition, :latest, name)
+  end
 
   @doc """
   Get the offset of the earliest message still persistent in Kafka
@@ -240,10 +241,10 @@ defmodule KafkaEx do
   [%KafkaEx.Protocol.Offset.Response{partition_offsets: [%{error_code: 0, offset: [0], partition: 0}], topic: "foo"}]
   ```
   """
-  @spec earliest_offset(binary, integer, atom | pid) ::
-          [OffsetResponse.t()] | :topic_not_found
-  def earliest_offset(topic, partition, name \\ Config.default_worker()),
-    do: offset(topic, partition, :earliest, name)
+  @spec earliest_offset(binary, integer, atom | pid) :: [OffsetResponse.t()] | :topic_not_found
+  def earliest_offset(topic, partition, name \\ Config.default_worker()) do
+    offset(topic, partition, :earliest, name)
+  end
 
   @doc """
   Get the offset of the message sent at the specified date/time
@@ -255,14 +256,14 @@ defmodule KafkaEx do
   [%KafkaEx.Protocol.Offset.Response{partition_offsets: [%{error_code: 0, offset: [256], partition: 0}], topic: "foo"}]
   ```
   """
-  @spec offset(
-          binary,
-          number,
-          :calendar.datetime() | :earliest | :latest,
-          atom | pid
-        ) :: [OffsetResponse.t()] | :topic_not_found
+  @type valid_timestamp :: :earliest | :latest | :calendar.datetime()
+  @spec offset(binary, number, valid_timestamp, atom | pid) :: [OffsetResponse.t()] | :topic_not_found
   def offset(topic, partition, time, name \\ Config.default_worker()) do
-    Server.call(name, {:offset, topic, partition, time})
+    case Server.call(name, {:offset, topic, partition, time}) do
+      {:ok, response} -> parse_offset_value(response)
+      {:error, :topic_not_found} -> :topic_not_found
+      result -> result
+    end
   end
 
   @wait_time 10
@@ -812,4 +813,25 @@ defmodule KafkaEx do
       end
     end
   end
+
+  # -------------------------------------------------------------------
+  # Backwards compatibility
+  # -------------------------------------------------------------------
+  defp parse_offset_value(
+         [%KafkaEx.New.Structs.Offset{topic: topic, partition_offsets: partition_offsets} | _] = offsets
+       ) do
+    Enum.map(offsets, fn offset ->
+      %OffsetResponse{
+        topic: offset.topic,
+        partition_offsets:
+          Enum.map(offset.partition_offsets, fn value ->
+            %{
+              partition: value.partition,
+              error_code: value.error_code,
+              offset: [value.offset]
+            }
+          end)
+      }
+    end)
+  end
 end

lib/kafka_ex/new/protocols/kayrock/list_offsets/v0_response_impl.ex

@@ -13,12 +13,12 @@ defimpl KafkaEx.New.Protocols.Kayrock.ListOffsets.Response, for: Kayrock.ListOff
   end
 
   defp build_offset(topic, %{partition: partition, error_code: 0, offsets: []}) do
-    data = %{partition: partition, offset: 0}
+    data = %{partition: partition, offset: 0, error_code: :no_error}
     {:ok, KafkaEx.New.Structs.Offset.from_list_offset(topic, [data])}
   end
 
   defp build_offset(topic, %{partition: partition, error_code: 0, offsets: [offset | _]}) do
-    data = %{partition: partition, offset: offset}
+    data = %{partition: partition, offset: offset, error_code: :no_error}
     {:ok, KafkaEx.New.Structs.Offset.from_list_offset(topic, [data])}
   end
 

lib/kafka_ex/new/protocols/kayrock/list_offsets/v1_response_impl.ex

@@ -13,7 +13,7 @@ defimpl KafkaEx.New.Protocols.Kayrock.ListOffsets.Response, for: Kayrock.ListOff
   end
 
   defp build_offset(topic, %{error_code: 0, partition: p, offset: o}) do
-    data = %{partition: p, offset: o}
+    data = %{partition: p, offset: o, error_code: :no_error}
     {:ok, KafkaEx.New.Structs.Offset.from_list_offset(topic, [data])}
   end
 

lib/kafka_ex/new/protocols/kayrock/list_offsets/v2_response_impl.ex

@@ -13,7 +13,7 @@ defimpl KafkaEx.New.Protocols.Kayrock.ListOffsets.Response, for: Kayrock.ListOff
   end
 
   defp build_offset(topic, %{error_code: 0, partition: p, offset: o, timestamp: t}) do
-    data = %{partition: p, offset: o, timestamp: t}
+    data = %{partition: p, offset: o, timestamp: t, error_code: :no_error}
     {:ok, KafkaEx.New.Structs.Offset.from_list_offset(topic, [data])}
   end
 

lib/kafka_ex/new/structs/offset/partition_offset.ex

@@ -2,14 +2,16 @@ defmodule KafkaEx.New.Structs.Offset.PartitionOffset do
   @moduledoc """
   This module represents Offset value for a specific partition
   """
-  defstruct [:partition, :offset, :timestamp]
+  defstruct [:partition, :offset, :error_code, :timestamp]
 
   @type partition :: KafkaEx.Types.partition()
   @type offset :: KafkaEx.Types.offset()
   @type timestamp :: KafkaEx.Types.timestamp()
+  @type error_code :: KafkaEx.Types.error_code()
 
   @type partition_response :: %{
           required(:partition) => partition,
+          required(:error_code) => error_code,
           required(:offset) => offset,
           optional(:timestamp) => timestamp
         }
@@ -24,12 +26,14 @@ defmodule KafkaEx.New.Structs.Offset.PartitionOffset do
   For backward compatibility with kafka_ex, we will replace this nil values with -1
   """
   @spec build(partition_response) :: __MODULE__.t()
-  def build(%{partition: p, offset: o, timestamp: t}), do: do_build(p, o, t)
-  def build(%{partition: p, offset: o}), do: do_build(p, o, -1)
+  def build(%{partition: p, offset: o, error_code: e, timestamp: t}), do: do_build(p, o, e, t)
+  def build(%{partition: p, offset: o, error_code: e}), do: do_build(p, o, e, -1)
+  def build(%{partition: p, offset: o}), do: do_build(p, o, :no_error, -1)
 
-  defp do_build(partition, offset, timestamp) do
+  defp do_build(partition, offset, error_code, timestamp) do
     %__MODULE__{
       partition: partition,
+      error_code: error_code,
       offset: offset,
       timestamp: timestamp
     }

test/integration/kayrock/compatibility_test.exs

@@ -42,11 +42,7 @@ defmodule KafkaEx.KayrockCompatibilityTest do
       {:ok, %{consumer_group: consumer_group, topic: topic}}
     end
 
-    test "with new client - returns group metadata", %{
-      client: client,
-      consumer_group: consumer_group,
-      topic: topic
-    } do
+    test "with new client - returns group metadata", %{client: client, consumer_group: consumer_group, topic: topic} do
       join_to_group(client, topic, consumer_group)
 
       {:ok, group_metadata} = KafkaExAPI.describe_group(client, consumer_group)
@@ -57,11 +53,7 @@ defmodule KafkaEx.KayrockCompatibilityTest do
       assert length(group_metadata.members) == 1
     end
 
-    test "with old client - returns group metadata", %{
-      client: client,
-      consumer_group: consumer_group,
-      topic: topic
-    } do
+    test "with old client - returns group metadata", %{client: client, consumer_group: consumer_group, topic: topic} do
       join_to_group(client, topic, consumer_group)
 
       {:ok, group_metadata} = KafkaEx.describe_group(consumer_group, worker_name: client)
@@ -109,21 +101,11 @@ defmodule KafkaEx.KayrockCompatibilityTest do
   end
 
   test "produce/4 without an acq required returns :ok", %{client: client} do
-    assert KafkaEx.produce("food", 0, "hey",
-             worker_name: client,
-             required_acks: 0
-           ) == :ok
+    assert KafkaEx.produce("food", 0, "hey", worker_name: client, required_acks: 0) == :ok
   end
 
   test "produce/4 with ack required returns an ack", %{client: client} do
-    {:ok, offset} =
-      KafkaEx.produce(
-        "food",
-        0,
-        "hey",
-        worker_name: client,
-        required_acks: 1
-      )
+    {:ok, offset} = KafkaEx.produce("food",0,"hey",worker_name: client,required_acks: 1)
 
     assert is_integer(offset)
     refute offset == nil
@@ -306,9 +288,7 @@ defmodule KafkaEx.KayrockCompatibilityTest do
     assert offset == 0
   end
 
-  test "latest_offset retrieves offset of 0 for non-existing topic", %{
-    client: client
-  } do
+  test "latest_offset retrieves offset of 0 for non-existing topic", %{client: client} do
     random_string = KafkaEx.TestHelpers.generate_random_string()
 
     {:ok, produce_offset} =