<?php namespace App\Http\Middleware; use Closure; use Illuminate\Support\Facades\App; use Illuminate\Support\Facades\Auth; class SetLanguage { /** * Handle an incoming request. * * @param \Illuminate\Http\Request $request * @return mixed */ public function handle($request, Closure $next) { // 3 possible cases here: // - The http client send an accept-language header // - There is an authenticated user with a possible language set // - No language is specified at all // // Priority to the user preference, then the header request, otherwise the fallback language. // Note that if a user is authenticated later by the auth guard, the app locale // will be overriden if the user has set a specific language in its preferences. $lang = config('app.fallback_locale'); $accepted = str_replace(' ', '', $request->header('Accept-Language')); if ($accepted && $accepted !== '*') { $prefLocales = array_reduce( array_diff(explode(',', $accepted), ['*']), function ($langs, $langItem) { [$langLong, $weight] = array_merge(explode(';q=', $langItem), [1]); $langShort = substr($langLong, 0, 2); if (array_key_exists($langShort, $langs)) { if ($langs[$langShort] < $weight) { $langs[$langShort] = (float) $weight; } } else { $langs[$langShort] = (float) $weight; } return $langs; }, [] ); arsort($prefLocales); // We take the first accepted language available foreach ($prefLocales as $locale => $weight) { if (in_array($locale, config('2fauth.locales'))) { $lang = $locale; break; } } } $user = $request->user(); if (! is_null($user) && $request->user()->preferences['lang'] != 'browser') { $lang = $request->user()->preferences['lang']; } // If the language is not available (or partial), strings will be translated using the fallback language. App::setLocale($lang); return $next($request); } }