[](https://hex.pm/packages/alternate)
------------------------------------
# Alternate
A library to serve your Phoenix app in different locales.
## Installation
The package can be installed as:
Add `alternate` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:alternate, "~> 0.1.0"}]
end
```
Ensure `alternate` is configured in `config/config.exs`:
```elixir
config :alternate,
locales: %{
"en-GB" => %{ path_prefix: "gb" },
"en-US" => %{ path_prefix: "us" }
},
locale_assign_key: :locale,
gettext_module: YourAppModule.Gettext
```
* `locales` this is a map of the locales you want to support, the key will also be used as the name for your Gettext locale.
* `path_prefix` is the prefix that will be used in your urls, for example: `http://example.com/gb` will load the `en-GB` locale.
* `locale_assign_key` is the key that will be used to store the loaded locale in the `assigns`
* `gettext_module` is the Gettext module to use, it will most probably be `{YourAppModule}.Gettext`
## Router
You'll need to import `Alternate` to your router(s), it is recommended that you do so in the `def router do` section in `web/web.ex`:
```elixir
import Alternate
```
this will let you be able to use the `localize` macro in your routes like this:
```elixir
localize get "/", PageController, :index
```
if we run `mix phoenix.routes` we'll see that it created all the routes for our defined locales:
```bash
$ mix phoenix.routes
page_path GET /gb AlternateExample.PageController [action: :index, locale: "en-GB"]
page_path GET /us AlternateExample.PageController [action: :index, locale: "en-US"]
```
Now all that's left to do is to add Alternate's plug into your pipeline, so that it can set the appropiate locale based on the requested path:
```elixir
plug Alternate.Plug
```
Now when you load `http://exmple.com/gb` the `:locale` assign will be equal to `"en-GB"`, and your Gettext locale will be set to `"en-GB"` automatically.
If we want to specify different text routes for different locales we can do it like this:
```elixir
localize get "/start", PageController, :index, translations: %{
"es-ES" => "/empezar"
}
```
The locales that you don't define in the `translations` map will use the `/start` route to match.
## Controller
We'll need to add an extra `init/1` function in or controllers so that they can support localised actions, you can add this to the `controller` section of your `web/web.ex`.
```elixir
use Alternate.Controller
```
## Route helpers
To generate localized routes we'll need to add this:
```elixir
import Alternate.Helpers
```
to our `controller` and `view` sections of our `web/web.ex`
now similarly to the routing, we can use `localize` to generate translated paths and urls:
```elixir
localize page_path(conn, :index)
```
