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path: root/server/locale/src/lib.rs
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/*
    Hurry Curry! - a game about cooking
    Copyright (C) 2025 Hurry Curry! Contributors

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, version 3 of the License only.

    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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/

pub mod message;

use anyhow::anyhow;
use hurrycurry_protocol::Message;
use std::{
    collections::HashMap,
    fmt::{Debug, Display},
    ops::Index,
    sync::LazyLock,
};

#[macro_export]
macro_rules! trm {
    ($id:literal $(, $typ:ident = $param:expr)*) => {
        hurrycurry_protocol::Message::Translation {
            id: $id.to_owned(),
            params: vec![$($crate::trm_param!($typ, $param)),*]
        }
    };
}

#[macro_export]
macro_rules! trm_param {
    (s, $x:expr) => {
        hurrycurry_protocol::Message::Text($x)
    };
    (i, $x:expr) => {
        hurrycurry_protocol::Message::Item($x)
    };
    (t, $x:expr) => {
        hurrycurry_protocol::Message::Tile($x)
    };
    (m, $x:expr) => {
        $x
    };
}

pub enum TrError {
    Tr {
        id: &'static str,
        params: Vec<Message>,
    },
    Plain(String),
}
impl From<TrError> for Message {
    fn from(value: TrError) -> Self {
        match value {
            TrError::Tr { id, params } => Self::Translation {
                id: id.to_owned(),
                params,
            },
            TrError::Plain(s) => Self::Text(s),
        }
    }
}
impl Debug for TrError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            TrError::Tr { id, params } => write!(f, "{} {:?}", tr(id), params),
            TrError::Plain(s) => write!(f, "{s}"),
        }
    }
}
impl Display for TrError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            TrError::Tr { id, params } => {
                if params.is_empty() {
                    write!(f, "{}", tr(id))
                } else {
                    let mut s = tr(id).to_string();
                    for (i, p) in params.iter().enumerate() {
                        s = s.replace(&format!("{{{i}}}"), &format!("{p:?}"));
                    }
                    write!(f, "{s}")
                }
            }
            TrError::Plain(s) => write!(f, "{s}"),
        }
    }
}

#[macro_export]
macro_rules! tre {
    ($id:literal $(, $typ:ident = $param:expr)*) => {
        $crate::TrError::Tr {
            id: $id,
            params: vec![$($crate::tre_param!($typ, $param)),*]
        }
    };
}

#[macro_export]
macro_rules! tre_param {
    (s, $x:expr) => {
        hurrycurry_protocol::Message::Text($x)
    };
    (i, $x:expr) => {
        hurrycurry_protocol::Message::Item($x)
    };
    (t, $x:expr) => {
        hurrycurry_protocol::Message::Tile($x)
    };
    (m, $x:expr) => {
        $x
    };
}

pub struct Locale(HashMap<String, String>);
impl Index<&'static str> for Locale {
    type Output = str;
    fn index(&self, index: &'static str) -> &Self::Output {
        self.0.get(index).map(|s| s.as_str()).unwrap_or(index)
    }
}

impl Locale {
    pub fn load() -> anyhow::Result<Self> {
        Ok(Self(
            include_str!("../../../locale/en.ini")
                .lines()
                .skip(1)
                .map(|l| {
                    let (k, v) = l.split_once("=").ok_or(anyhow!("'=' missing"))?;
                    Ok::<_, anyhow::Error>((
                        k.trim_end().to_owned(),
                        v.trim_start().replace("%n", "\n"),
                    ))
                })
                .collect::<anyhow::Result<HashMap<_, _>>>()?,
        ))
    }
    pub fn get(&self, id: &str) -> Option<&str> {
        self.0.get(id).map(|x| x.as_str())
    }
}

pub static FALLBACK_LOCALE: LazyLock<Locale> = LazyLock::new(|| Locale::load().unwrap());
pub fn tr(s: &'static str) -> &'static str {
    &FALLBACK_LOCALE[s]
}