Add transformers for BookId.

lib/decentralised_book_index/sync/data_transformers/bid_transformer.ex

@@ -0,0 +1,20 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.BidTransformer 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"]),
+        type: get_in(json_body, ["attributes", "type"]),
+        bid: get_in(json_body, ["attributes", "bid"])
+      }
+
+    {:ok, attrs}
+  end
+end

lib/decentralised_book_index/sync/data_transformers/bids_transformer.ex

@@ -0,0 +1,21 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.BidsTransformer do
+  alias DecentralisedBookIndex.Sync.DataTransformers.BidTransformer
+
+  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} = BidTransformer.from_json(record)
+         record
+       end
+     )}
+  end
+end

test/decentralised_book_index/sync/data_transformers/bid_transformer_test.exs

@@ -0,0 +1,51 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.BidTransformerTest do
+  use ExUnit.Case, async: true
+
+  alias DecentralisedBookIndex.Sync.DataTransformers.BidTransformer
+
+  describe "correct transformations" do
+    test "a json contains correct bid information" do
+      json_body =
+        %{
+          "data" => %{
+            "attributes" => %{"bid" => "1234567890", "order" => 0, "type" => "isbn"},
+            "id" => "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+            "links" => %{},
+            "meta" => %{},
+            "relationships" => %{},
+            "type" => "book_id"
+          }
+        }
+
+      assert {:ok, bid} = BidTransformer.from_json(json_body)
+
+      assert %{
+               id: "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+               order: 0,
+               type: "isbn",
+               bid: "1234567890"
+             } = bid
+    end
+
+    test "a json doesn't contains bid information \"data\" attribute" do
+      json_body =
+        %{
+          "attributes" => %{"bid" => "1234567890", "order" => 0, "type" => "isbn"},
+          "id" => "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+          "links" => %{},
+          "meta" => %{},
+          "relationships" => %{},
+          "type" => "book_id"
+        }
+
+      assert {:ok, bid} = BidTransformer.from_json(json_body)
+
+      assert %{
+               id: "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+               order: 0,
+               type: "isbn",
+               bid: "1234567890"
+             } = bid
+    end
+  end
+end

test/decentralised_book_index/sync/data_transformers/bids_transformer_test.exs

@@ -0,0 +1,54 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.BidsTransformerTest do
+  use ExUnit.Case, async: true
+
+  alias DecentralisedBookIndex.Sync.DataTransformers.BidsTransformer
+
+  describe "correct transformations" do
+    test "a json contains correct bids information" do
+      json_body =
+        %{
+          "data" => [
+            %{
+              "attributes" => %{"bid" => "1234567890", "order" => 0, "type" => "asin"},
+              "id" => "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+              "links" => %{},
+              "meta" => %{},
+              "relationships" => %{},
+              "type" => "book_id"
+            },
+            %{
+              "attributes" => %{"bid" => "1234567890123", "order" => 1, "type" => "isbn13"},
+              "id" => "31eafe52-0f39-49ad-8980-cdd448f9c738",
+              "links" => %{},
+              "meta" => %{},
+              "relationships" => %{},
+              "type" => "book_id"
+            }
+          ],
+          "jsonapi" => %{"version" => "1.0"},
+          "links" => %{
+            "self" =>
+              "http://localhost:4000/api/v1/json/books/233987a5-f318-460b-9973-e553c99a0eaf/bids"
+          },
+          "meta" => %{}
+        }
+
+      assert {:ok, bids} = BidsTransformer.from_json(json_body)
+
+      assert [
+               %{
+                 id: "0c0c0b3a-0410-4cb0-a7e3-b62bb392b097",
+                 order: 0,
+                 type: "asin",
+                 bid: "1234567890"
+               },
+               %{
+                 id: "31eafe52-0f39-49ad-8980-cdd448f9c738",
+                 order: 1,
+                 type: "isbn13",
+                 bid: "1234567890123"
+               }
+             ] = bids
+    end
+  end
+end