/**

 * parameter-lister (Rust implementation)

 * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

use std::io;

use outputmodule::*;

pub static MOD_NAME: &'static str = "xml";

trait XMLEscape {

	fn xml_escape(self) -> Self;

}

impl XMLEscape for String {

	fn xml_escape(self) -> String {

		self.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")

	}

}

pub struct XMLModule;

impl XMLModule {

	pub fn new() -> XMLModule { XMLModule }

	fn process_io(&self, output: &mut Write, parameters: Vec<String>) -> io::Result<()> {

		try!(write!(output, "<parameters>\n"));

		for p in parameters {

			try!(write!(output, "\t<parameter>{}</parameter>\n", p.xml_escape()));

		}

		try!(write!(output, "</parameters>\n"));

		Ok(())

	}

}

impl OutputModule for XMLModule {

	fn process(&self, output: &mut Write, parameters: Vec<String>) -> Result<(), String> {

		match self.process_io(output, parameters) {

			Ok(()) => Ok(()),

			Err(err) => Err(format!("{}", err)),

		}

	}

}