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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Utils.Params do
+ # As in Mastodon API, per https://api.rubyonrails.org/classes/ActiveModel/Type/Boolean.html
+ @falsy_param_values [false, 0, "0", "f", "F", "false", "False", "FALSE", "off", "OFF"]
+
+ defp explicitly_falsy_param?(value), do: value in @falsy_param_values
+
+ # Note: `nil` and `""` are considered falsy values in Pleroma
+ defp falsy_param?(value),
+ do: explicitly_falsy_param?(value) or value in [nil, ""]
+
+ def truthy_param?(value), do: not falsy_param?(value)
+end