<?php
/**
 * PHPCI - Continuous Integration for PHP
 *
 * @copyright    Copyright 2014, Block 8 Limited.
 * @license      https://github.com/Block8/PHPCI/blob/master/LICENSE.md
 * @link         https://www.phptesting.org/
 */

namespace PHPCI\Helper;

/**
 * Class MailerFactory helps to set up and configure a SwiftMailer object.
 *
 * @package PHPCI\Helper
 */
class MailerFactory
{
    /**
     * @var array
     */
    protected $emailConfig;

    /**
     * Set the mailer factory configuration.
     *
     * @param array $config
     */
    public function __construct($config = array())
    {
        if (!is_array($config)) {
            $config = array();
        }

        $this->emailConfig  = isset($config['email_settings']) ? $config['email_settings'] : array();
    }

    /**
     * Returns an instance of Swift_Mailer based on the config.
     *
     * @return \Swift_Mailer
     */
    public function getSwiftMailerFromConfig()
    {
        $encryptionType = $this->getMailConfig('smtp_encryption');

        // Workaround issue where smtp_encryption could == 1 in the past by
        // checking it is a valid transport
        if ($encryptionType && !in_array($encryptionType, stream_get_transports())) {
            $encryptionType = null;
        }

        /** @var \Swift_SmtpTransport $transport */
        $transport = \Swift_SmtpTransport::newInstance(
            $this->getMailConfig('smtp_address'),
            $this->getMailConfig('smtp_port'),
            $encryptionType
        );
        $transport->setUsername($this->getMailConfig('smtp_username'));
        $transport->setPassword($this->getMailConfig('smtp_password'));

        return \Swift_Mailer::newInstance($transport);
    }

    /**
     * Return a specific configuration value by key.
     *
     * @param $configName
     *
     * @return null|string
     */
    public function getMailConfig($configName)
    {
        if (isset($this->emailConfig[$configName]) && $this->emailConfig[$configName] != "") {
            return $this->emailConfig[$configName];
        } else {
            // Check defaults
            switch($configName) {
                case 'smtp_address':
                    return "localhost";
                case 'default_mailto_address':
                    return null;
                case 'smtp_port':
                    return '25';
                case 'smtp_encryption':
                    return null;
                default:
                    return "";
            }
        }
    }
}