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New Localization Package

lundi 23 janvier 2017

As a result of figuring out what was going on with the session and the middleware yesterday I was able to rewrite my localization code and greatly simplify the whole project. Previously I had been calling a function to set the language in every single controller action that returned a view, I was able to eliminate all of that and consolidate everything in the middleware.

I made another package - escuccim/translate - that has two parts:

First is the middleware which does two things:

   a. Checks the subdomain to see if the subdomain corresponds to a language. If so it sets the app locale to the appropriate language.

   b. Checks to see if there is a session variable with the language in it, if so it sets the app locale accordingly.

The key for me here is that if there is a locale specified by both the subdomain and the session, the session takes precedence, thus allowing the user to display the page in whatever language they desire, irregardless of the subdomain.

The second component of the package is a route which accepts a locale as a parameter and sets a session variable to that locale, so that the middleware can then access that information.

This package is available on my GitHub and my Packagist. When I am done testing it you can install it via composer.

I'm glad I took the time to investigate the session/middleware issues because figuring that out allowed me to replace code that was unneccessary and ugly to look at with a nice, simple, elegant solution.

Libellés: coding, laravel, localization
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Update on Localization

jeudi 29 d├ęcembre 2016

After I had everything written and working I decided to go back and try to figure out why I couldn't run my function to get the language out of session and put it into the app config globally. It didn't make sense that I needed to cut and paste the same function into every single controller. So I tried it again as a helper function and this time it works perfectly. I have no idea why it didn't work before, but it's working now. I took the function out of the controllers and replaced it with a call to the helper, which is much better because I don't need to have the same exact code repeated in 10 different places, although it is a bit frustrating that I don't know why it didn't work at first.

I also added a call to setlocale() in the helper function which allows dates to be localized using strftime() instead of date(). I spent a while trying to get this working - I had to add the locales to the server using:

dpkg-reconfigure locales

And select the locales you want to use and then restart Apache. I wasn't able to get the date localization working on my local dev environment, for which I am using Homestead. I am still not sure why, the main difference between my production server and my dev environment is that the former uses Apache and the latter Nginx, so maybe it has something to do with that. As much as I hate not knowing why things don't work that should work, I'm not going to spend more time trying to figure it out since it is working here.

Libellés: coding, localization
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Laravel Localization

dimanche 18 d├ęcembre 2016

I decided to try to translate this site into French, given that I live in the French-speaking part of Switzerland. Laravel has a lot of great tools for localization built-in, but there were a few things sorely lacking. Laravel, by default, has localization files in /resources/lang/en. Each file is just an array with a key and the translated text as the value. If you want to add a new language you just copy the files over into a new directory, in this case /fr, and translate the text directly in there. In the views instead of typing in the text directly you call trans('file.key') and it pulls the text for 'key' out of the 'file.php' in the appropriate language directory. This couldn't be any easier.

The hard part was when I started trying to figure out how to set the language to be displayed automatically. Laravel pulls this value from config/app.php, and you can change this value easily, but because Laravel is RESTful it has to be done on every request. So I decided to stick the actual language in a session variable and then change the value in the config array if needed.

I tried to make a middleware to do this on each request, but this didn't work because it seemed as if the session either wasn't saving from middleware, or possibly wasn't initialized yet in the middleware. More on this below. So I abandoned the middleware route and added a function in my controller that sets the language thusly:

App::setLocale( session('locale') ? session('locale') : config('app.locale'));

This worked fine, I just need to make sure to call the function everytime a page may need to be translated. My next step was to try to add a subdomain 'fr.' that would automatically set the language to French. You can do this in the web.php routes file, but from what I can tell it needs to be called on every single route, which seemed like an awful lot of work for something that should be pretty easy. 

So I went back to the middleware and created a middleware called SetLanguage that I added to app\Http\Kernel.php so it runs on every request. The middleware is quite simply this:

$pieces = explode('.', $request->getHost());
if($pieces[0] == 'fr'){
    session(['locale' => 'fr']);
}
return $next($request);

And this works fine. I think the problems I had with the middleware the first time I tried it was that Laravel has changed how sessions are handled in new releases, and the Session facade no longer works or works differently. Instead you now use the session() helper function or call $request->session() to modify the session. I had been trying to use the Session facade.

One thing that seems a bit odd is that since the middleware runs on every request it should translate every page that is called from the fr. subdomain to French. In actuallity it initially sets the language to French, but if you change the language using the drop-down menu it keeps the selection. This doesn't seem right, but in this case the actual behavior makes more sense than the expected behavior, so I am ignoring this bug.

Once I got this figured out, the translation was a simple matter of replacing text in my views with references to the lang files, which went smoothly, although I did have to spend some time trying to figure out how to translate some technical terms into French, and still am not sure I have them all translated properly.  

Libellés: coding, laravel, localization
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