JSON Get Text

This is a library for getting text from JSON usually for internationalization.

Example

#[macro_use] extern crate json_gettext;

let ctx = static_json_gettext_build!(
    "en_US";
    "en_US" => "langs/en_US.json",
    "zh_TW" => "langs/zh_TW.json"
).unwrap();

assert_eq!("Hello, world!", get_text!(ctx, "hello").unwrap());
assert_eq!("哈囉，世界！", get_text!(ctx, "zh_TW", "hello").unwrap());

Rocket Support

This crate supports the Rocket framework. In order to reload changed json files instead of recompiling the program you have to enable the rocket feature for this crate.

[dependencies.json-gettext]
version = "*"
features = ["rocket"]

Then, use the static_json_gettext_build_for_rocket macro instead of the static_json_gettext_build macro to build a JSONGetText(JSONGetTextManager).

#[macro_use] extern crate json_gettext;

#[macro_use] extern crate rocket;

use rocket::State;
use rocket::response::Redirect;

use json_gettext::JSONGetTextManager;

#[get("/")]
fn index(ctx: &State<JSONGetTextManager>) -> Redirect {
    Redirect::temporary(uri!(hello(lang = ctx.get_default_key())))
}

#[get("/<lang>")]
fn hello(ctx: &State<JSONGetTextManager>, lang: String) -> String {
    format!("Ron: {}", get_text!(ctx, lang, "hello").unwrap().as_str().unwrap())
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .attach(static_json_gettext_build_for_rocket!(
            "en_US";
            "en_US" => "langs/en_US.json",
            "zh_TW" => "langs/zh_TW.json"
        ))
        .mount("/", routes![index, hello])
}

If you are not using the release profile, JSONGetTextManager can reload the json files automatically if needed.

unic-langid Support

Since string comparison could be slow, the language_region_pair feature, the language feature or the region feature can be enabled to change key's type to (Language, Option<Region>), Language or Region respectively where Language and Region structs are in the unic-langid crate.

In this case, the key! macro would be useful for generating a Key instance from a literal string.

For example,

[dependencies.json-gettext]
version = "*"
features = ["language_region_pair", "rocket"]

#[macro_use]
extern crate rocket;

#[macro_use]
extern crate rocket_accept_language;

#[macro_use]
extern crate json_gettext;

use rocket::State;

use rocket_accept_language::unic_langid::subtags::Language;
use rocket_accept_language::AcceptLanguage;

use json_gettext::{JSONGetTextManager, Key};

const LANGUAGE_EN: Language = language!("en");

#[get("/")]
fn index(ctx: &State<JSONGetTextManager>, accept_language: &AcceptLanguage) -> String {
    let (language, region) = accept_language.get_first_language_region().unwrap_or((LANGUAGE_EN, None));

    format!("Ron: {}", get_text!(ctx, Key(language, region), "hello").unwrap().as_str().unwrap())
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .attach(static_json_gettext_build_for_rocket!(
            key!("en");
            key!("en") => "langs/en_US.json",
            key!("zh_TW") => "langs/zh_TW.json",
        ))
        .mount("/", routes![index])
}

Crates.io

https://crates.io/crates/json-gettext

Documentation

https://docs.rs/json-gettext

License

MIT