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/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

//! This module contains the transform [`Caps`] that's used mostly for debugging or testing purposes

use std::convert::Infallible;

use super::TransformField;
use crate::action::transform::result::TransformResult;

/// Make all text in a field UPPERCASE
#[derive(Debug)]
pub struct Caps;

impl TransformField for Caps {
	type Err = Infallible;

	// Infallible
	fn transform_field(&self, field: Option<&str>) -> Result<TransformResult<String>, Self::Err> {
		Ok(TransformResult::New(field.map(str::to_uppercase)))
	}
}