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//! ## Translator
//!
//! `translator` is the module which takes care of translating latin to russian cyrillic and viceversa

/*
*
*   Copyright (C) 2020 Christian Visintin - christian.visintin1997@gmail.com
*
* 	This file is part of "Pyc"
*
*   Pyc 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.
*
*   Pyc 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 Pyc.  If not, see <http://www.gnu.org/licenses/>.
*
*/

use std::fmt;

pub mod ioprocessor;

/// ### Language
///
/// Cyrillic alphabet language
/// NOTE: add here new languages
#[derive(Copy, Clone, PartialEq, fmt::Debug)]
pub enum Language {
  Russian,
}

impl ToString for Language {
  fn to_string(&self) -> String {
    match self {
      Language::Russian => String::from("рус")
    }
  }
}

/// ## Languages
///
/// Languages are empty structs which must implement the Translator trait

//NOTE: languages are listed here
struct Russian {}
mod russian;

/// ### Translator
///
/// Struct used to convert form cyrillic script to latin script and viceversa
pub trait Translator {
  /// ### to_latin
  ///
  /// Converts a string which contains russian cyrillic characters into a latin string.
  /// Characters between '"' (quotes) are escaped, expressions inside escaped blocks are translitarated anyway
  fn to_latin(&self, input: String) -> String;

  /// ### to_cyrillic
  ///
  /// Converts a string which contains latin characters into a russian cyrillic string.
  /// Characters between quotes are escapes
  fn to_cyrillic(&self, input: String) -> String;
}

/// ### new_translator
///
/// instantiates a new Translator with the provided language,
/// associating the correct conversion functions
pub fn new_translator(language: Language) -> Box<dyn Translator> {
  match language {
    Language::Russian => Box::new(Russian {}),
  }
}

#[cfg(test)]
mod tests {

  use super::*;

  #[test]
  fn test_language() {
    let language: Language = Language::Russian;
    assert_eq!(language.to_string(), String::from("рус"))
  }

}