feat(chat): initial implementation for edit live view

lib/slax_web/live/chat_room_live/edit.ex

@@ -0,0 +1,49 @@
+defmodule SlaxWeb.ChatRoomLive.Edit do
+  @moduledoc false
+  use SlaxWeb, :live_view
+
+  alias Slax.Chat
+
+  @impl Phoenix.LiveView
+  def render(assigns) do
+    ~H"""
+    <div class="mx-auto w-96 mt-12">
+      <.header>
+        <%= @page_title %>
+        <:actions>
+          <.link
+            class="font-normal text-xs text-blue-600 hover:text-blue-700"
+            navigate={~p"/rooms/#{@room}"}
+          >
+            Back
+          </.link>
+        </:actions>
+      </.header>
+      <.simple_form for={@form} id="room-form">
+        <.input field={@form[:name]} type="text" label="Name" />
+        <.input field={@form[:topic]} type="text" label="Topic" />
+        <:actions>
+          <.button phx-disable-with="Saving..." class="w-full">Save</.button>
+        </:actions>
+      </.simple_form>
+    </div>
+    """
+  end
+
+  @impl Phoenix.LiveView
+  def mount(%{"id" => id}, _session, socket) do
+    room = Chat.get_room!(id)
+    changeset = Chat.change_room(room)
+
+    socket =
+      socket
+      |> assign(page_title: "Edit chat room", room: room)
+      |> assign_form(changeset)
+
+    {:ok, socket}
+  end
+
+  defp assign_form(socket, %Ecto.Changeset{} = changeset) do
+    assign(socket, :form, to_form(changeset))
+  end
+end