feat(chat): add events to validate/save chat in live view

lib/slax_web/live/chat_room_live/edit.ex

@@ -19,7 +19,7 @@ defmodule SlaxWeb.ChatRoomLive.Edit do
           </.link>
         </:actions>
       </.header>
-      <.simple_form for={@form} id="room-form">
+      <.simple_form for={@form} id="room-form" phx-change="validate-room" phx-submit="save-room">
         <.input field={@form[:name]} type="text" label="Name" />
         <.input field={@form[:topic]} type="text" label="Topic" />
         <:actions>
@@ -43,6 +43,32 @@ defmodule SlaxWeb.ChatRoomLive.Edit do
     {:ok, socket}
   end
 
+  @impl Phoenix.LiveView
+  def handle_event("save-room", %{"room" => room_params}, socket) do
+    socket =
+      case Chat.update_room(socket.assigns.room, room_params) do
+        {:ok, room} ->
+          socket
+          |> put_flash(:info, "Room #{room.name} updated succesfully")
+          |> push_navigate(to: ~p"/rooms/#{room}")
+
+        {:error, changeset} ->
+          assign_form(socket, changeset)
+      end
+
+    {:noreply, socket}
+  end
+
+  @impl Phoenix.LiveView
+  def handle_event("validate-room", %{"room" => room_params}, socket) do
+    changeset =
+      socket.assigns.room
+      |> Chat.change_room(room_params)
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign_form(socket, changeset)}
+  end
+
   defp assign_form(socket, %Ecto.Changeset{} = changeset) do
     assign(socket, :form, to_form(changeset))
   end