Implement client room messages endpoint

lib/architex_web/client/request/messages.ex

@@ -0,0 +1,21 @@
+defmodule ArchitexWeb.Client.Request.Messages do
+  use ArchitexWeb.Request
+
+  @primary_key false
+  embedded_schema do
+    field :from, :string
+    field :to, :string
+    field :dir, :string
+    field :limit, :integer
+    field :filter, :string
+  end
+
+  def changeset(data, params) do
+    data
+    |> cast(params, [:from, :to, :dir, :limit, :filter], empty_values: [])
+    |> validate_required([:dir])
+    |> Architex.validate_not_nil([:from])
+    |> validate_inclusion(:dir, ["b", "f"])
+    |> validate_number(:limit, greater_than: 0)
+  end
+end