Merge branch 'main' into feature/338_import_custom_fields

lib/mv/config.ex

@@ -21,4 +21,99 @@ defmodule Mv.Config do
   def sql_sandbox? do
     Application.get_env(:mv, :sql_sandbox, false)
   end
+
+  @doc """
+  Returns the maximum file size for CSV imports in bytes.
+
+  Reads the `max_file_size_mb` value from the CSV import configuration
+  and converts it to bytes.
+
+  ## Returns
+
+    - Maximum file size in bytes (default: 10_485_760 bytes = 10 MB)
+
+  ## Examples
+
+      iex> Mv.Config.csv_import_max_file_size_bytes()
+      10_485_760
+  """
+  @spec csv_import_max_file_size_bytes() :: non_neg_integer()
+  def csv_import_max_file_size_bytes do
+    max_file_size_mb = get_csv_import_config(:max_file_size_mb, 10)
+    max_file_size_mb * 1024 * 1024
+  end
+
+  @doc """
+  Returns the maximum number of rows allowed in CSV imports.
+
+  Reads the `max_rows` value from the CSV import configuration.
+
+  ## Returns
+
+    - Maximum number of rows (default: 1000)
+
+  ## Examples
+
+      iex> Mv.Config.csv_import_max_rows()
+      1000
+  """
+  @spec csv_import_max_rows() :: pos_integer()
+  def csv_import_max_rows do
+    get_csv_import_config(:max_rows, 1000)
+  end
+
+  @doc """
+  Returns the maximum file size for CSV imports in megabytes.
+
+  Reads the `max_file_size_mb` value from the CSV import configuration.
+
+  ## Returns
+
+    - Maximum file size in megabytes (default: 10)
+
+  ## Examples
+
+      iex> Mv.Config.csv_import_max_file_size_mb()
+      10
+  """
+  @spec csv_import_max_file_size_mb() :: pos_integer()
+  def csv_import_max_file_size_mb do
+    get_csv_import_config(:max_file_size_mb, 10)
+  end
+
+  # Helper function to get CSV import config values
+  defp get_csv_import_config(key, default) do
+    Application.get_env(:mv, :csv_import, [])
+    |> Keyword.get(key, default)
+    |> parse_and_validate_integer(default)
+  end
+
+  # Parses and validates integer configuration values.
+  #
+  # Accepts:
+  # - Integer values (passed through)
+  # - String integers (e.g., "1000") - parsed to integer
+  # - Invalid values (e.g., "abc", nil) - falls back to default
+  #
+  # Always clamps the result to a minimum of 1 to ensure positive values.
+  #
+  # Note: We don't log warnings for unparseable values because:
+  # - These functions may be called frequently (e.g., on every request)
+  # - Logging would create excessive log spam
+  # - The fallback to default provides a safe behavior
+  # - Configuration errors should be caught during deployment/testing
+  defp parse_and_validate_integer(value, _default) when is_integer(value) do
+    max(1, value)
+  end
+
+  defp parse_and_validate_integer(value, default) when is_binary(value) do
+    case Integer.parse(value) do
+      {int, _remainder} -> max(1, int)
+      :error -> default
+    end
+  end
+
+  defp parse_and_validate_integer(_value, default) do
+    default
+  end
 end