lipilekhika 1.1.0

A transliteration library for Indian Brahmic scripts
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mod custom_options;
mod generated;
mod schema;
#[allow(clippy::module_inception)]
mod script_data;
mod script_list;

use std::collections::HashMap;

pub use custom_options::*;
pub use schema::*;
pub use script_list::*;

use crate::scripts::Script;

/// Returns the list of all supported custom options for
/// transliterations for the provided script pair.
pub fn get_all_options(from_script: Script, to_script: Script) -> Vec<String> {
  let from_script_data = ScriptData::get_script_data(&from_script.into());
  let to_script_data = ScriptData::get_script_data(&to_script.into());

  // Create a HashMap with all custom options set to true.
  // `custom_options_map` is insertion-ordered (same as `custom_options.json`),
  // but `HashMap` is not. We only use this for lookup below.
  let custom_options_map = get_custom_options_map();
  let all_options_enabled: HashMap<String, bool> = custom_options_map
    .keys()
    .map(|key| (key.clone(), true))
    .collect();

  let active_options = crate::transliterate::transliterate::get_active_custom_options(
    from_script_data,
    to_script_data,
    Some(&all_options_enabled),
  );

  // Preserve `custom_options.json` order by filtering in that key order.
  let mut ordered: Vec<String> = Vec::new();
  for key in custom_options_map.keys() {
    if active_options.contains_key(key) {
      ordered.push(key.clone());
    }
  }

  ordered
}

#[cfg(test)]
mod tests {
  use super::*;
  use crate::scripts::Script;
  use std::str::FromStr;

  #[test]
  fn test_get_all_option_valid_scripts() {
    let _ = get_all_options(Script::Devanagari, Script::Telugu);
  }

  #[test]
  fn test_get_all_option_normalized_names() {
    let from = Script::from_str("dev").unwrap().into();
    let to = Script::from_str("tel").unwrap().into();
    let _ = get_all_options(from, to);
  }
}