Add ByteWithUnit type

lib/file_size_ecto/type/byte_with_unit.ex

@@ -0,0 +1,49 @@
+defmodule FileSizeEcto.Type.ByteWithUnit do
+  @behaviour Ecto.Type
+
+  alias FileSize.Convertible
+  alias FileSize.InvalidUnitError
+  alias FileSizeEcto.Type.Byte, as: ByteType
+
+  @impl true
+  def type, do: :map
+
+  @impl true
+  def cast(term)
+
+  def cast(%{"bytes" => _, "unit" => _} = term) do
+    load(term)
+  end
+
+  def cast(term) do
+    ByteType.cast(term)
+  end
+
+  @impl true
+  def dump(term) do
+    case cast(term) do
+      {:ok, size} ->
+        {:ok, %{
+          "bytes" => Convertible.normalized_value(size),
+          "unit" => to_string(size.unit)
+        }}
+
+      _ ->
+        :error
+    end
+  end
+
+  @impl true
+  def load(term)
+
+  def load(%{"bytes" => bytes, "unit" => unit_str})
+  when is_integer(bytes) and is_binary(unit_strs) do
+    unit = String.to_existing_atom(unit_str)
+    {:ok, FileSize.from_bytes(bytes, unit)}
+  rescue
+    error in [ArgumentError, InvalidUnitError] ->
+      :error
+  end
+
+  def load(_term), do: :error
+end

test/support/test_schema.ex

@@ -6,5 +6,6 @@ defmodule TestSchema do
   embedded_schema do
     field :bit_size, FileSizeEcto.Type.Bit
     field :byte_size, FileSizeEcto.Type.Byte
+    field :byte_size_with_unit, FileSizeEcto.Type.ByteWithUnit
   end
 end