Rocket I18N

A crate to help you internationalize your Rocket applications.

Features

• Build helpers (with the build feature enabled), to update and compile PO files.
• Select the correct locale for each request
• Provides a macro to internationalize any string.

Usage

First add it to your Cargo.toml (you have to use the git version, because we can't publish the latest version on https://crates.io as it depends on the master branch of Rocket):

toml [dependencies.rocket_i18n] git = "https://github.com/BaptisteGelez/rocket_i18n" rev = "<LATEST COMMIT>"

Then, in your main.rs:

```rust extern crate rocket;

[macro_use]

extern crate rocket_i18n;

fn main() { rocket::ignite() // Make Rocket manage your translations. .manage(rocket_i18n::i18n("your-domain", vec![ "en", "fr", "de", "ja" ])); // Register routes, etc } ```

Then in all your requests you'll be able to use the i18n macro to translate anything. It takes a gettext::Catalog and a string to translate as argument.

```rust

#[macrouse] extern crate rocketi18n;

use rocket_i18n::I18n;

[get("/")]

fn route(i18n: I18n) -> &str { i18n!(i18n.catalog, "Hello, world!") } ```

For strings that may have a plural form, just add the plural and the number of element to the arguments

rust i18n!(i18n.catalog, "One new message", "{0} new messages", 42);

Any extra argument, after a ;, will be used for formatting.

rust let user_name = "Alex"; i18n!(i18n.catalog, "Hello {0}!"; user_name);

When using it with plural, {0} will be the number of elements, and other arguments will start at {1}.

Because of its design, rocket_i18n is only compatible with askama. You can use the t macro in your templates, as long as they have a field called catalog to store your catalog.

Editing the POT

For those strings to be translatable you should also add them to the po/YOUR_DOMAIN.pot file. To add a simple message, just do:

po msgid "Hello, world" # The string you used with your filter msgstr "" # Always empty

For plural forms, the syntax is a bit different:

po msgid "You have one new notification" # The singular form msgid_plural "You have {{ count }} new notifications" # The plural one msgstr[0] "" msgstr[1] ""

Using with Actix Web

First, disable the default features so it doesn't pull in all of Rocket. toml [dependencies.rocket_i18n] version = "0.2" default-features = false features = ["actix-web"]

Then add it to your application. ```rust

[macro_use]

extern crate rocket_i18n;

use rocket_i18n::{I18n, Internationalized, Translations};

fn route_handler(i18n: I18n) -> &str { i18n!(i18n.catalog, "Hello, world!") }

[derive(Clone)]

struct MyState { translations: Translations, }

impl Internationalized for MyState { fn get(&self) -> Translations { self.translations.clone() } }

fn main() { let state = MyState { translations: rocket_i18n::i18n("your-domain", vec![ "en", "fr", "de", "ja" ]); };

App::with_state(state)
    .resource("", |r| r.with(route_handler))
    .finish();

} ```