Added an console command for updating currency exchange rates.

src/Command/UpdateExchangeRatesCommand.php

@@ -0,0 +1,102 @@
+<?php
+
+namespace App\Command;
+
+use App\Entity\PriceInformations\Currency;
+use App\Form\AdminPages\CurrencyAdminForm;
+use Doctrine\ORM\EntityManagerInterface;
+use PHPUnit\Runner\Exception;
+use Swap\Builder;
+use Swap\Swap;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+class UpdateExchangeRatesCommand extends Command
+{
+    protected static $defaultName = 'app:update-exchange-rates';
+
+    protected $base_current;
+    protected $em;
+
+    public function __construct(string $base_current, EntityManagerInterface $entityManager)
+    {
+        //$this->swap = $swap;
+        $this->base_current = $base_current;
+
+        $this->em = $entityManager;
+
+        parent::__construct();
+    }
+
+    protected function configure()
+    {
+        $this
+            ->setDescription('Updates the currency exchange rates.')
+            ->addArgument('iso_code', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, 'The ISO Codes of the currencies that should be updated.')
+            ->addOption('service', null, InputOption::VALUE_REQUIRED,
+                'Which service should be used for requesting the exchange rates (e.g. fixer). See florianv/swap for full list.',
+                'exchange_rates_api')
+            ->addOption('api_key', null, InputOption::VALUE_REQUIRED,
+                'The API key to use for the service.',
+                null);
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $io = new SymfonyStyle($input, $output);
+
+        //Check for valid base current
+        if (strlen($this->base_current) !== 3) {
+            $io->error("Choosen Base current is not valid. Check your settings!");
+            return;
+        }
+
+        $io->note('Update currency exchange rates with base currency: ' . $this->base_current);
+
+        $service = $input->getOption('service');
+        $api_key = $input->getOption('api_key');
+
+        //Construct Swap with the given options
+        $swap = (new Builder())
+            ->add($service, ['access_key' => $api_key])
+            ->build();
+
+        //Check what currencies we need to update:
+        $iso_code = $input->getArgument('iso_code');
+        $repo = $this->em->getRepository(Currency::class);
+        $candidates = array();
+
+        if (!empty($iso_code)) {
+            $candidates = $repo->findBy(['iso_code' => $iso_code]);
+        } else {
+            $candidates = $repo->findAll();
+        }
+
+        $success_counter = 0;
+
+        //Iterate over each candidate and update exchange rate
+        foreach ($candidates as $currency) {
+            try {
+                $rate = $swap->latest($currency->getIsoCode() . '/' . $this->base_current);
+                $currency->setExchangeRate($rate->getValue());
+                $io->note(sprintf('Set exchange rate of %s to %f', $currency->getIsoCode(), $currency->getExchangeRate()));
+                $this->em->persist($currency);
+
+                $success_counter++;
+            } catch (\Exchanger\Exception\Exception $ex) {
+                $io->warning(sprintf('Error updating %s:', $currency->getIsoCode()));
+                $io->warning($ex->getMessage());
+            }
+
+        }
+
+        //Save to database
+        $this->em->flush();
+
+        $io->success(sprintf('%d (of %d) currency exchange rates were updated.', $success_counter, count($candidates)));
+    }
+}