formatting and refactoring

lib/mv/membership/import/member_csv.ex

@@ -310,10 +310,17 @@ defmodule Mv.Membership.Import.MemberCSV do
 
         case process_row(row_map, line_number, custom_field_lookup, actor) do
           {:ok, _member} ->
-            update_inserted({acc_inserted, acc_failed, acc_errors, acc_error_count, acc_truncated?})
+            update_inserted(
+              {acc_inserted, acc_failed, acc_errors, acc_error_count, acc_truncated?}
+            )
 
           {:error, error} ->
-            handle_row_error({acc_inserted, acc_failed, acc_errors, acc_error_count, acc_truncated?}, error, current_error_count, max_errors)
+            handle_row_error(
+              {acc_inserted, acc_failed, acc_errors, acc_error_count, acc_truncated?},
+              error,
+              current_error_count,
+              max_errors
+            )
         end
       end)
 

lib/mv_web/live/global_settings_live.ex

@@ -364,114 +364,97 @@ defmodule MvWeb.GlobalSettingsLive do
 
   @impl true
   def handle_event("start_import", _params, socket) do
-    # Server-side admin check
-    if Authorization.can?(socket.assigns[:current_user], :create, Mv.Membership.Member) do
-      # Prevent concurrent imports
-      if socket.assigns.import_status == :running do
+    case check_import_prerequisites(socket) do
+      {:error, message} ->
+        {:noreply, put_flash(socket, :error, message)}
+
+      :ok ->
+        process_csv_upload(socket)
+    end
+  end
+
+  # Checks if import can be started (admin permission, status, upload ready)
+  defp check_import_prerequisites(socket) do
+    cond do
+      not Authorization.can?(socket.assigns[:current_user], :create, Mv.Membership.Member) ->
+        {:error, gettext("Only administrators can import members from CSV files.")}
+
+      socket.assigns.import_status == :running ->
+        {:error, gettext("Import is already running. Please wait for it to complete.")}
+
+      Enum.empty?(socket.assigns.uploads.csv_file.entries) ->
+        {:error, gettext("Please select a CSV file to import.")}
+
+      not List.first(socket.assigns.uploads.csv_file.entries).done? ->
+        {:error,
+         gettext("Please wait for the file upload to complete before starting the import.")}
+
+      true ->
+        :ok
+    end
+  end
+
+  # Processes CSV upload and starts import
+  defp process_csv_upload(socket) do
+    with {:ok, content} <- consume_and_read_csv(socket),
+         {:ok, import_state} <- MemberCSV.prepare(content) do
+      start_import(socket, import_state)
+    else
+      {:error, reason} when is_binary(reason) ->
         {:noreply,
          put_flash(
            socket,
            :error,
-           gettext("Import is already running. Please wait for it to complete.")
+           gettext("Failed to prepare CSV import: %{reason}", reason: reason)
          )}
-      else
-        # Check if upload is completed
-        upload_entries = socket.assigns.uploads.csv_file.entries
 
-        if Enum.empty?(upload_entries) do
-          {:noreply,
-           put_flash(
-             socket,
-             :error,
-             gettext("Please select a CSV file to import.")
-           )}
-        else
-          entry = List.first(upload_entries)
+      {:error, error} ->
+        error_message = format_error_message(error)
+        {:noreply,
+         put_flash(
+           socket,
+           :error,
+           gettext("Failed to prepare CSV import: %{error}", error: error_message)
+         )}
+    end
+  end
 
-          if entry.done? do
-            with {:ok, content} <- consume_and_read_csv(socket) do
-              case MemberCSV.prepare(content) do
-                {:ok, import_state} ->
-                  total_chunks = length(import_state.chunks)
+  # Starts the import process
+  defp start_import(socket, import_state) do
+    progress = initialize_import_progress(import_state)
 
-                  progress = %{
-                    inserted: 0,
-                    failed: 0,
-                    errors: [],
-                    warnings: import_state.warnings || [],
-                    status: :running,
-                    current_chunk: 0,
-                    total_chunks: total_chunks,
-                    errors_truncated?: false
-                  }
+    socket =
+      socket
+      |> assign(:import_state, import_state)
+      |> assign(:import_progress, progress)
+      |> assign(:import_status, :running)
 
-                  socket =
-                    socket
-                    |> assign(:import_state, import_state)
-                    |> assign(:import_progress, progress)
-                    |> assign(:import_status, :running)
+    send(self(), {:process_chunk, 0})
 
-                  send(self(), {:process_chunk, 0})
+    {:noreply, socket}
+  end
 
-                  {:noreply, socket}
+  # Initializes import progress structure
+  defp initialize_import_progress(import_state) do
+    %{
+      inserted: 0,
+      failed: 0,
+      errors: [],
+      warnings: import_state.warnings || [],
+      status: :running,
+      current_chunk: 0,
+      total_chunks: length(import_state.chunks),
+      errors_truncated?: false
+    }
+  end
 
-                {:error, error} ->
-                  error_message =
-                    case error do
-                      %{message: msg} when is_binary(msg) -> msg
-                      %{errors: errors} when is_list(errors) -> inspect(errors)
-                      reason when is_binary(reason) -> reason
-                      other -> inspect(other)
-                    end
-
-                  {:noreply,
-                   put_flash(
-                     socket,
-                     :error,
-                     gettext("Failed to prepare CSV import: %{error}", error: error_message)
-                   )}
-              end
-            else
-              {:error, reason} when is_binary(reason) ->
-                {:noreply,
-                 put_flash(
-                   socket,
-                   :error,
-                   gettext("Failed to prepare CSV import: %{reason}", reason: reason)
-                 )}
-
-              {:error, error} ->
-                error_message =
-                  case error do
-                    %{message: msg} when is_binary(msg) -> msg
-                    %{errors: errors} when is_list(errors) -> inspect(errors)
-                    other -> inspect(other)
-                  end
-
-                {:noreply,
-                 put_flash(
-                   socket,
-                   :error,
-                   gettext("Failed to prepare CSV import: %{error}", error: error_message)
-                 )}
-            end
-          else
-            {:noreply,
-             put_flash(
-               socket,
-               :error,
-               gettext("Please wait for the file upload to complete before starting the import.")
-             )}
-          end
-        end
-      end
-    else
-      {:noreply,
-       put_flash(
-         socket,
-         :error,
-         gettext("Only administrators can import members from CSV files.")
-       )}
+  # Formats error messages for display
+  defp format_error_message(error) do
+    case error do
+      %{message: msg} when is_binary(msg) -> msg
+      %{errors: errors} when is_list(errors) -> inspect(errors)
+      reason when is_binary(reason) -> reason
+      other -> inspect(other)
     end
   end
 
@@ -610,7 +593,9 @@ defmodule MvWeb.GlobalSettingsLive do
       send(live_view_pid, {:chunk_done, idx, chunk_result})
     else
       # Start async task to process chunk in production
-      Task.Supervisor.async_nolink(Mv.TaskSupervisor, fn ->
+      # Use start_child for fire-and-forget: no monitor, no Task messages
+      # We only use our own send/2 messages for communication
+      Task.Supervisor.start_child(Mv.TaskSupervisor, fn ->
         {:ok, chunk_result} =
           MemberCSV.process_chunk(
             chunk,