Move block handling code to its own module

Author: tomkr

lib/draft.ex

@@ -29,56 +29,7 @@ defmodule Draft do
   def to_html(input) do
     input
       |> blocks
-      |> Enum.map(&process_block/1)
+      |> Enum.map(&Draft.Block.to_html/1)
       |> Enum.join("")
   end
-
-  defp process_block(%{"type" => "unstyled",
-                      "text" => "",
-                      "key" => _,
-                      "data" => _,
-                      "depth" => _,
-                      "entityRanges" => _,
-                      "inlineStyleRanges" => _}) do
-    "<br>"
-  end
-
-  defp process_block(%{"type" => "header-" <> header,
-                      "text" => text,
-                      "key" => _,
-                      "data" => _,
-                      "depth" => _,
-                      "entityRanges" => _,
-                      "inlineStyleRanges" => _}) do
-    tag = header_tags[header]
-    "<#{tag}>#{text}</#{tag}>"
-  end
-
-  defp process_block(%{"type" => "blockquote",
-                      "text" => text,
-                      "key" => _,
-                      "data" => _,
-                      "depth" => _,
-                      "entityRanges" => _,
-                      "inlineStyleRanges" => _}) do
-    "<blockquote>#{text}</blockquote>"
-  end
-
-  defp process_block(%{"type" => "unstyled",
-                      "text" => text,
-                      "key" => _,
-                      "data" => _,
-                      "depth" => _,
-                      "entityRanges" => _,
-                      "inlineStyleRanges" => _}) do
-    "<p>#{text}</p>"
-  end
-
-  defp header_tags do
-    %{
-      "one"   => "h1",
-      "two"   => "h2",
-      "three" => "h3"
-    }
-  end
 end

lib/draft/block.ex

@@ -0,0 +1,68 @@
+defmodule Draft.Block do
+  @moduledoc """
+  Converts a single DraftJS block to html.
+  """
+
+  @doc """
+  Renders the given DraftJS input as html.
+
+  ## Examples
+      iex> block = %{"key" => "1", "text" => "Hello", "type" => "unstyled",
+      ...>   "depth" => 0,  "inlineStyleRanges" => [], "entityRanges" => [],
+      ...>   "data" => %{}}
+      iex> Draft.Block.to_html block
+      "<p>Hello</p>"
+  """
+  def to_html(block) do
+    process_block(block)
+  end
+
+  defp process_block(%{"type" => "unstyled",
+                      "text" => "",
+                      "key" => _,
+                      "data" => _,
+                      "depth" => _,
+                      "entityRanges" => _,
+                      "inlineStyleRanges" => _}) do
+    "<br>"
+  end
+
+  defp process_block(%{"type" => "header-" <> header,
+                      "text" => text,
+                      "key" => _,
+                      "data" => _,
+                      "depth" => _,
+                      "entityRanges" => _,
+                      "inlineStyleRanges" => _}) do
+    tag = header_tags[header]
+    "<#{tag}>#{text}</#{tag}>"
+  end
+
+  defp process_block(%{"type" => "blockquote",
+                      "text" => text,
+                      "key" => _,
+                      "data" => _,
+                      "depth" => _,
+                      "entityRanges" => _,
+                      "inlineStyleRanges" => _}) do
+    "<blockquote>#{text}</blockquote>"
+  end
+
+  defp process_block(%{"type" => "unstyled",
+                      "text" => text,
+                      "key" => _,
+                      "data" => _,
+                      "depth" => _,
+                      "entityRanges" => _,
+                      "inlineStyleRanges" => _}) do
+    "<p>#{text}</p>"
+  end
+
+  defp header_tags do
+    %{
+      "one"   => "h1",
+      "two"   => "h2",
+      "three" => "h3"
+    }
+  end
+end

test/draft/block_test.exs

@@ -0,0 +1,4 @@
+defmodule BlockTest do
+  use ExUnit.Case
+  doctest Draft.Block
+end