Add transformers for AuthorRole.

lib/decentralised_book_index/sync/data_transformers/author_role_transformer.ex

@@ -0,0 +1,20 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorRoleTransformer do
+  def from_json(json_body) do
+    json_body =
+      if Map.has_key?(json_body, "data") do
+        json_body["data"]
+      else
+        json_body
+      end
+
+    attrs =
+      %{
+        id: get_in(json_body, ["id"]),
+        order: get_in(json_body, ["attributes", "order"]),
+        role: get_in(json_body, ["attributes", "role"]),
+        author_id: get_in(json_body, ["attributes", "author_id"])
+      }
+
+    {:ok, attrs}
+  end
+end

lib/decentralised_book_index/sync/data_transformers/author_roles_transformer.ex

@@ -0,0 +1,21 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorRolesTransformer do
+  alias DecentralisedBookIndex.Sync.DataTransformers.AuthorRoleTransformer
+
+  def from_json(json_body) do
+    json_body =
+      if Map.has_key?(json_body, "data") do
+        json_body["data"]
+      else
+        json_body
+      end
+
+    {:ok,
+     Enum.map(
+       json_body,
+       fn record ->
+         {:ok, record} = AuthorRoleTransformer.from_json(record)
+         record
+       end
+     )}
+  end
+end

test/decentralised_book_index/sync/data_transformers/author_role_transformer_test.exs

@@ -0,0 +1,59 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorRoleTransformerTest do
+  use ExUnit.Case, async: true
+
+  alias DecentralisedBookIndex.Sync.DataTransformers.AuthorRoleTransformer
+
+  describe "correct transformations" do
+    test "a json contains correct author role information" do
+      json_body =
+        %{
+          "data" => %{
+            "attributes" => %{
+              "author_id" => "d6d784a9-4c9c-45a3-8068-a5a30bbe8934",
+              "order" => 0,
+              "role" => ""
+            },
+            "id" => "eafd6569-aaac-442d-a64a-8df17051f0bc",
+            "links" => %{},
+            "meta" => %{},
+            "relationships" => %{"author" => %{"links" => %{}, "meta" => %{}}},
+            "type" => "author_role"
+          }
+        }
+
+      assert {:ok, author_role} = AuthorRoleTransformer.from_json(json_body)
+
+      assert %{
+               id: "eafd6569-aaac-442d-a64a-8df17051f0bc",
+               order: 0,
+               role: "",
+               author_id: "d6d784a9-4c9c-45a3-8068-a5a30bbe8934"
+             } = author_role
+    end
+
+    test "a json doesn't contains author role information \"data\" attribute" do
+      json_body =
+        %{
+          "attributes" => %{
+            "author_id" => "d6d784a9-4c9c-45a3-8068-a5a30bbe8934",
+            "order" => 0,
+            "role" => ""
+          },
+          "id" => "eafd6569-aaac-442d-a64a-8df17051f0bc",
+          "links" => %{},
+          "meta" => %{},
+          "relationships" => %{"author" => %{"links" => %{}, "meta" => %{}}},
+          "type" => "author_role"
+        }
+
+      assert {:ok, author_role} = AuthorRoleTransformer.from_json(json_body)
+
+      assert %{
+               id: "eafd6569-aaac-442d-a64a-8df17051f0bc",
+               order: 0,
+               role: "",
+               author_id: "d6d784a9-4c9c-45a3-8068-a5a30bbe8934"
+             } = author_role
+    end
+  end
+end

test/decentralised_book_index/sync/data_transformers/author_roles_transformer_test.exs

@@ -0,0 +1,62 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorRolesTransformerTest do
+  use ExUnit.Case, async: true
+
+  alias DecentralisedBookIndex.Sync.DataTransformers.AuthorRolesTransformer
+
+  describe "correct transformations" do
+    test "a json contains correct author roles information" do
+      json_body =
+        %{
+          "data" => [
+            %{
+              "attributes" => %{
+                "author_id" => "d6d784a9-4c9c-45a3-8068-a5a30bbe8934",
+                "order" => 0,
+                "role" => ""
+              },
+              "id" => "eafd6569-aaac-442d-a64a-8df17051f0bc",
+              "links" => %{},
+              "meta" => %{},
+              "relationships" => %{"author" => %{"links" => %{}, "meta" => %{}}},
+              "type" => "author_role"
+            },
+            %{
+              "attributes" => %{
+                "author_id" => "d6d784a9-4c9c-45a3-8068-a5a30bbe8935",
+                "order" => 1,
+                "role" => "Translator"
+              },
+              "id" => "eafd6569-aaac-442d-a64a-8df17051f0ba",
+              "links" => %{},
+              "meta" => %{},
+              "relationships" => %{"author" => %{"links" => %{}, "meta" => %{}}},
+              "type" => "author_role"
+            }
+          ],
+          "jsonapi" => %{"version" => "1.0"},
+          "links" => %{
+            "self" =>
+              "http://localhost:4000/api/v1/json/books/233987a5-f318-460b-9973-e553c99a0eaf/author_roles"
+          },
+          "meta" => %{}
+        }
+
+      assert {:ok, author_roles} = AuthorRolesTransformer.from_json(json_body)
+
+      assert [
+               %{
+                 id: "eafd6569-aaac-442d-a64a-8df17051f0bc",
+                 order: 0,
+                 role: "",
+                 author_id: "d6d784a9-4c9c-45a3-8068-a5a30bbe8934"
+               },
+               %{
+                 id: "eafd6569-aaac-442d-a64a-8df17051f0ba",
+                 order: 1,
+                 role: "Translator",
+                 author_id: "d6d784a9-4c9c-45a3-8068-a5a30bbe8935"
+               }
+             ] = author_roles
+    end
+  end
+end