I want to have a drop-down in my navbar where I can select a currency and all the prices in my app convert to selected currency, I know I should use middle-ware for this matter but I don't know how to begin. I am using Fixer with laravel-swap as a package for exchange rates.
What I've done
I have made a middleware named it Currancy and it's content:
<?php namespace App\Http\Middleware; use Closure; use Swap\Swap; use Swap\Builder; class Currancy { /** * Handle an incoming request. * * @param \Illuminate\Http\Request $request * @param \Closure $next * @return mixed */ public function handle($request, Closure $next) { if (Session::has('appcurrency') AND array_key_exists(Session::get('appcurrency'), Config::get('currencies'))) { $currency = Session::get('appcurrency'); App::setLocale($currency); } else { App::setLocale(Config::get('app.currency')); } return $next($request); } } I also made a currencies.php in config folder:
<?php return [ 'IDR' => [ 'name' => 'Indunesian Rupiah', ], 'USD' => [ 'name' => 'U.S Dollar', ], 'EUR' => [ 'name' => 'Euro', ], ]; I also added this to my config\app.php
'currency' => 'IDR', in that case my default currency is IDR unless user select others.
PS: for my middleware and config file I've got the idea of language translation and I don't have an idea how to join it to
SWAPpackage in order to work! :\
Questions
- Is the way I try to handle currencies correct way?
- What else should I do for the next step?
thanks.
1 Answers
Answers 1
First, App::setLocale() is for language purpose.
Second Dont use a middle-ware to set a session default value it will bloat your route file. use the view composer for output. https://laravel.com/docs/4.2/responses#view-composers
Run this command if you dont have a view composer provider:
php artisan make:provider ComposerServiceProvider Then in the file "app/Providers/ComposerServiceProvider.php", in the "boot()" method
public function boot() { View::composer(array('header','footer'), function($view) { if (!currentCurrency()) { setCurrency(config('app.currency')); } $view->with('currencies', config('currencies'); }); } And define some helper functions. to load a helper, use the autoload feature of the composer. in the file "composer.json" in the "autoload" attribute tight after the "psr-4" one: here it will load the file "app/Support/helpers.php" as an example.
"psr-4": { "App\\": "app/" }, "files": [ "app/Support/helpers.php" ] After jou change the "composer.json" file, dont forget to regenerate the autoload file with the command:
composer dump-autoload then in the file "app/Support/helpers.php" (create it) put these functions:
<?php if (!function_exists('currentCurrency')) { /** * @return string */ function currentCurrency(){ if (Session::has('appcurrency') AND array_key_exists(Session::get('appcurrency'), config('currencies'))) { return Session::get('appcurrency'); } return ''; } } if (!function_exists('setCurrency')) { /** * @param string $currency * @return void * @throws \Exception */ function setCurrency($currency){ if (array_key_exists($currency, config('currencies'))) { Session::set('appcurrency', $currency); } else { throw new \Exception('not a valid currency'); } } } if you need to set the locale to one of the currency, juste change the "setCurrency" method (since you only need to set the locale once in a session.
/** * @param string $currency * @return void * @throws \Exception */ function setCurrency($currency){ if (array_key_exists($currency, config('currencies'))) { Session::set('appcurrency', $currency); App::setLocale($currency); } else { throw new \Exception('not a valid currency'); } } 
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