Added support for creation of associated conversations with message v…

…ia params

lib/code_corps/messages/conversations.ex

@@ -0,0 +1,19 @@
+defmodule CodeCorps.Messages.Conversations do
+  @moduledoc ~S"""
+  Subcontext aimed at managing `CodeCorps.Conversation` records aimed at a
+  specific user belonging to a `CodeCorps.Message`.
+  """
+
+  alias Ecto.Changeset
+
+  alias CodeCorps.{Conversation}
+
+  @doc false
+  @spec create_changeset(Conversation.t, map) :: Ecto.Changeset.t
+  def create_changeset(%Conversation{} = conversation, %{} = attrs) do
+    conversation
+    |> Changeset.cast(attrs, [:user_id])
+    |> Changeset.validate_required([:user_id])
+    |> Changeset.assoc_constraint(:user)
+  end
+end

lib/code_corps/messages/messages.ex

@@ -67,6 +67,11 @@ defmodule CodeCorps.Messages do
   def create(%{} = params) do
     %Message{}
     |> Message.changeset(params)
+    |> Changeset.cast(params, [:author_id, :project_id])
+    |> Changeset.validate_required([:author_id, :project_id])
+    |> Changeset.assoc_constraint(:author)
+    |> Changeset.assoc_constraint(:project)
+    |> Changeset.cast_assoc(:conversations, with: &Messages.Conversations.create_changeset/2)
     |> Repo.insert()
   end
 

lib/code_corps_web/controllers/conversation_controller.ex

@@ -9,7 +9,7 @@ defmodule CodeCorpsWeb.ConversationController do
   }
 
   action_fallback CodeCorpsWeb.FallbackController
-  plug CodeCorpsWeb.Plug.DataToAttributes
+  plug CodeCorpsWeb.Plug.DataToAttributes, %{"conversation" => "conversations"}
   plug CodeCorpsWeb.Plug.IdsToIntegers
 
   @spec index(Conn.t, map) :: Conn.t

lib/code_corps_web/controllers/message_controller.ex

@@ -9,7 +9,7 @@ defmodule CodeCorpsWeb.MessageController do
   }
 
   action_fallback CodeCorpsWeb.FallbackController
-  plug CodeCorpsWeb.Plug.DataToAttributes
+  plug CodeCorpsWeb.Plug.DataToAttributes, %{"conversation" => "conversations"}
   plug CodeCorpsWeb.Plug.IdsToIntegers
 
   @spec index(Conn.t, map) :: Conn.t
@@ -23,7 +23,7 @@ defmodule CodeCorpsWeb.MessageController do
   @spec show(Conn.t, map) :: Conn.t
   def show(%Conn{} = conn, %{"id" => id}) do
     with %User{} = current_user <- conn |> CodeCorps.Guardian.Plug.current_resource,
-      %Message{} = message <- Message |> Repo.get(id),
+      %Message{} = message <- Message |> Repo.get(id) |> preload(),
       {:ok, :authorized} <- current_user |> Policy.authorize(:show, message, %{}) do
       conn |> render("show.json-api", data: message)
     end
@@ -40,7 +40,7 @@ defmodule CodeCorpsWeb.MessageController do
     end
   end
 
-  @preloads [:author, :project]
+  @preloads [:author, :project, :conversations]
 
   def preload(data) do
     Repo.preload(data, @preloads)

lib/code_corps_web/plugs/data_to_attributes.ex

@@ -12,13 +12,31 @@ defmodule CodeCorpsWeb.Plug.DataToAttributes do
   def init(opts), do: opts
 
   @spec call(Conn.t, Keyword.t) :: Plug.Conn.t
-  def call(%Conn{params: %{"data" => data} = params} = conn, _opts) do
+  def call(%Conn{params: %{"data" => data} = params} = conn, many_mappings) do
     attributes =
       params
       |> Map.delete("data")
-      |> Map.merge(data |> JaSerializer.Params.to_attributes)
+      |> Map.delete("included")
+      |> Map.merge(params |> parse_data)
+      |> Map.merge(params |> parse_included(many_mappings))
+      |> IO.inspect
 
     conn |> Map.put(:params, attributes)
   end
   def call(%Conn{} = conn, _opts), do: conn
+
+  defp parse_data(%{"data" => data}), do: data |> JaSerializer.Params.to_attributes
+  defp parse_data(%{}), do: %{}
+
+  defp parse_included(%{"included" => included}, many_mappings) do
+    included |> Enum.reduce(%{}, fn (%{"data" => %{"type" => type}} = params, parsed) ->
+      attributes = params |> parse_data()
+
+      case many_mappings |> Map.has_key?(type) do
+        true -> parsed |> Map.update(many_mappings[type], [attributes], &List.push(&1, attributes))
+        false -> parsed |> Map.put(type, attributes)
+      end
+    end)
+  end
+  defp parse_included(%{}, _), do: %{}
 end

lib/code_corps_web/views/message_view.ex

@@ -7,4 +7,6 @@ defmodule CodeCorpsWeb.MessageView do
 
   has_one :author, type: "user", field: :author_id
   has_one :project, type: "project", field: :project_id
+
+  has_many :conversations, serializer: CodeCorpsWeb.ConversationView, identifiers: :always
 end