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use crate::lang;
use crate::num2words::Num2Err;
use crate::Currency;
use num_bigfloat::BigFloat;
use std::str::FromStr;
/// Defines what is a language
pub trait Language {
fn to_cardinal(&self, num: BigFloat) -> Result<String, Num2Err>;
fn to_ordinal(&self, num: BigFloat) -> Result<String, Num2Err>;
fn to_ordinal_num(&self, num: BigFloat) -> Result<String, Num2Err>;
fn to_year(&self, num: BigFloat) -> Result<String, Num2Err>;
fn to_currency(&self, num: BigFloat, currency: Currency) -> Result<String, Num2Err>;
}
/// Languages available in `num2words`
#[allow(non_camel_case_types)]
pub enum Lang {
/// ```
/// use num2words::{Num2Words, Lang};
/// assert_eq!(
/// Num2Words::new(42).lang(Lang::English).to_words(),
/// Ok(String::from("forty-two"))
/// );
/// ```
English,
/// French from France and Canada
/// ```
/// use num2words::{Num2Words, Lang};
/// assert_eq!(
/// Num2Words::new(42).lang(Lang::French).to_words(),
/// Ok(String::from("quarante-deux"))
/// );
/// ```
French,
/// French from Belgium and the Democratic Republic of the Congo
/// ```
/// use num2words::{Num2Words, Lang};
/// assert_eq!(
/// Num2Words::new(70).lang(Lang::French_BE).to_words(),
/// Ok(String::from("septante"))
/// );
/// ```
French_BE,
/// French from Swiss Confederation and Aosta Valley (Italy)
/// ```
/// use num2words::{Num2Words, Lang};
/// assert_eq!(
/// Num2Words::new(80).lang(Lang::French_CH).to_words(),
/// Ok(String::from("huitante"))
/// );
/// ```
French_CH,
/// ```
/// use num2words::{Num2Words, Lang};
/// assert_eq!(
/// Num2Words::new(42).lang(Lang::Ukrainian).to_words(),
/// Ok(String::from("сорок два"))
/// );
/// ```
Ukrainian,
}
impl FromStr for Lang {
type Err = ();
/// Parses a string to return a value of this type
///
/// | Locale | Lang | 42 |
/// | --------- | ----------------- | ------------- |
/// | `en` | `Lang::English` | forty-two |
/// | `fr` | `Lang::French` | quarante-deux |
/// | `fr_BE` | `Lang::French_BE` | quarante-deux |
/// | `fr_CH` | `Lang::French_CH` | quarante-deux |
/// | `uk` | `Lang::Ukrainian` | сорок два |
fn from_str(input: &str) -> Result<Self, Self::Err> {
match input {
"en" => Ok(Self::English),
"fr" => Ok(Self::French),
"fr_BE" => Ok(Self::French_BE),
"fr_CH" => Ok(Self::French_CH),
"uk" => Ok(Self::Ukrainian),
_ => Err(()),
}
}
}
pub fn to_language(lang: Lang, preferences: Vec<String>) -> Box<dyn Language> {
match lang {
Lang::English => {
let last = preferences
.iter()
.rev()
.find(|v| ["oh", "nil"].contains(&v.as_str()));
if let Some(v) = last {
return Box::new(lang::English::new(v == "oh", v == "nil"));
}
Box::new(lang::English::new(false, false))
}
Lang::French => {
let feminine = preferences
.iter()
.find(|v| ["feminine", "feminin", "féminin", "f"].contains(&v.as_str()))
.is_some();
let reformed = preferences
.iter()
.find(|v: &&String| ["reformed", "1990", "rectifié", "rectification"].contains(&v.as_str()))
.is_some();
Box::new(lang::French::new(feminine, reformed, lang::fr::RegionFrench::FR))
}
Lang::French_BE => {
let feminine = preferences
.iter()
.find(|v| ["feminine", "feminin", "féminin", "f"].contains(&v.as_str()))
.is_some();
let reformed = preferences
.iter()
.find(|v: &&String| ["reformed", "1990", "rectifié", "rectification"].contains(&v.as_str()))
.is_some();
Box::new(lang::French::new(feminine, reformed, lang::fr::RegionFrench::BE))
}
Lang::French_CH => {
let feminine = preferences
.iter()
.find(|v| ["feminine", "feminin", "féminin", "f"].contains(&v.as_str()))
.is_some();
let reformed = preferences
.iter()
.find(|v: &&String| ["reformed", "1990", "rectifié", "rectification"].contains(&v.as_str()))
.is_some();
Box::new(lang::French::new(feminine, reformed, lang::fr::RegionFrench::CH))
}
Lang::Ukrainian => {
let declension: lang::uk::Declension = preferences
.iter()
.rev()
.find_map(|d| d.parse().ok())
.unwrap_or_default();
let gender: lang::uk::Gender = preferences
.iter()
.rev()
.find_map(|d| d.parse().ok())
.unwrap_or_default();
let number: lang::uk::GrammaticalNumber = preferences
.iter()
.rev()
.find_map(|d| d.parse().ok())
.unwrap_or_default();
Box::new(lang::Ukrainian::new(gender, number, declension))
}
}
}