app/Controller/CurrencyController.php

<?php

namespace Kanboard\Controller;

/**
 * Currency Controller
 *
 * @package  Kanboard\Controller
 * @author   Frederic Guillot
 */
class CurrencyController extends BaseController
{
    /**
     * Display all currency rates
     *
     * @access public
     */
    public function show()
    {
        $this->response->html($this->helper->layout->config('currency/show', array(
            'application_currency' => $this->configModel->get('application_currency'),
            'rates'                => $this->currencyModel->getAll(),
            'currencies'           => $this->currencyModel->getCurrencies(),
            'title'                => t('Settings') . ' &gt; ' . t('Currency rates'),
        )));
    }

    /**
     * Add or change currency rate
     *
     * @access public
     * @param array $values
     * @param array $errors
     */
    public function create(array $values = array(), array $errors = array())
    {
        $this->response->html($this->template->render('currency/create', array(
            'values'     => $values,
            'errors'     => $errors,
            'currencies' => $this->currencyModel->getCurrencies(),
        )));
    }

    /**
     * Validate and save a new currency rate
     *
     * @access public
     */
    public function save()
    {
        $values = $this->request->getValues();
        list($valid, $errors) = $this->currencyValidator->validateCreation($values);

        if ($valid) {
            if ($this->currencyModel->create($values['currency'], $values['rate'])) {
                $this->flash->success(t('The currency rate has been added successfully.'));
                $this->response->redirect($this->helper->url->to('CurrencyController', 'show'), true);
                return;
            } else {
                $this->flash->failure(t('Unable to add this currency rate.'));
            }
        }

        $this->create($values, $errors);
    }

    /**
     * Change reference currency
     *
     * @access public
     * @param array $values
     * @param array $errors
     */
    public function change(array $values = array(), array $errors = array())
    {
        if (empty($values)) {
            $values['application_currency'] = $this->configModel->get('application_currency');
        }

        $this->response->html($this->template->render('currency/change', array(
            'values'     => $values,
            'errors'     => $errors,
            'currencies' => $this->currencyModel->getCurrencies(),
        )));
    }

    /**
     * Save reference currency
     *
     * @access public
     */
    public function update()
    {
        $values = $this->request->getValues();

        if ($this->configModel->save($values)) {
            $this->flash->success(t('Settings saved successfully.'));
        } else {
            $this->flash->failure(t('Unable to save your settings.'));
        }

        $this->response->redirect($this->helper->url->to('CurrencyController', 'show'), true);
    }
}