[Wiki] MailGun Api Wrapper to send emails

<?php
/**
 * MailGun
 * @author VINAY KUMAR SHARMA <vinaykrsharma@live.in>
 */
class MailGun extends CApplicationComponent {
    /***************************************************************************
                              PUBLIC Properties
    ***************************************************************************/
 
    /**
     * PHP Curl Options, use PHP Curl constant variable to pass.
     * e.g:
     *   CURLOPT_HEADER => TRUE
     *   CURLOPT_USERAGENT => 'Bond/0.0.7'
     * @var array PHP Curl extension options
     */
    public $options = array();
 
    /**
     * Default Sender Address
     * if don't found in send() method parameters
     * 
     * @var string Sender email
     */
    public $defaultFromEmail = 'postmaster@localhost';
 
    /***************************************************************************
                      PRIVATE and PROTECTED Properties
    ***************************************************************************/
 
    /**
     * The path to the directory where the view for getView is stored. Must not
     * have ending dot.
     *
     * @var string
     */
    protected $pathViews = 'application.views.email';
 
    /**
     * The path to the directory where the layout for getView is stored. Must
     * not have ending dot.
     *
     * @var string
     */
    protected $pathLayouts = 'application.views.email.layouts';
 
    protected $httpHeaders = array(
        CURLOPT_HTTPHEADER => array(
            'Accept: application/json',
            'Accept-Language: en-us;q=0.5,en;q=0.3',
            'Accept-Charset: utf-8;q=0.7,*;q=0.7',
            'Keep-Alive: 300'
        ),
    );
 
    /**
     * @var object curl_init() return value
     */
    private $_ch;
    private $_curlOptions = array(
        CURLOPT_URL => "https://api.mailgun.net/v2/YOURDOMAIN.COM/messages",
        CURLOPT_USERPWD => 'api:key-f82c1b4ebc17cd0afca13a4-21ca935a7', // Set Yours
        CURLOPT_HEADER => false,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_TIMEOUT => 30,
        CURLOPT_CUSTOMREQUEST => 'POST',
        CURLOPT_POST => true,
        CURLOPT_USERAGENT => 'Mozilla/5.0 (Linux; Ubuntu) MailGun-Curl-Client.in/1.0b'
    );
 
    public function __construct() {
 
    }
 
    public function init() {
        parent::init();
        foreach ($this->options as $key => $value) {
            $this->_curlOptions[$key] = $value;
        }
        if (!isset($this->_curlOptions[CURLOPT_USERPWD]) || empty($this->_curlOptions[CURLOPT_USERPWD])) {
            throw new CException('MailGun: Option `CURLOPT_USERPWD` is not found in option');
        }
    }
 
    /***************************************************************************
                           GETTERS and SETTERS
    ***************************************************************************/
 
    /**
     * Setter
     *
     * @param string $value pathLayouts
     */
    public function setPathLayouts($value) {
        if (!is_string($value) && !preg_match("/[a-z0-9\.]/i", $value)) {
            throw new CException(Yii::t('MailGun', 'pathLayouts must be a Yii alias path'));
        }
        $this->pathLayouts = $value;
    }
 
    /**
     * Getter
     *
     * @return string pathLayouts
     */
    public function getPathLayouts() {
        return $this->pathLayouts;
    }
 
    /**
     * Setter
     *
     * @param string $value pathViews
     */
    public function setPathViews($value) {
        if (!is_string($value) && !preg_match("/[a-z0-9\.]/i", $value)) {
            throw new CException(Yii::t('MailGun', 'pathViews must be a Yii alias path'));
        }
        $this->pathViews = $value;
    }
 
    /**
     * Getter
     *
     * @return string pathViews
     */
    public function getPathViews() {
        return $this->pathViews;
    }
 
    /**
     * Displays an e-mail in preview mode. 
     *
     * @param string $view the class
     * @param array $vars Controller->renderPartial() options
     * @param string $layout
     */
    public function getView($view, $vars = array(), $layout = null) {
        $controller = Yii::app()->controller;
        $body = $controller->renderPartial($this->pathViews . '.' . $view,
                $vars, true);
        if ($layout === null) {
            return $body;
        }
        return $controller->renderPartial($this->pathLayouts . '.' . $layout, array('content' => $body), true);
    }
 
    /**
     * Send Email
     * 
     * @param string $to Send emails to. comma seperate email address for multiple
     * receipients
     * @param string $subject Subject of the Email
     * @param string $html_body HTML Body of the email
     * @param array $extras options
     *  <ul>
     *      <li><strong>from:</strong> Sender Email ID</li>
     *      <li><strong>text:</strong> Alternate email in simple text format</li>
     *      <li><strong>tags:</strong> Tag the email with comma seperated value</li>
     *  </ul>
     */
    public function send($to, $subject, $html_body, $extras = array()) {
        try {
            $this->_ch = curl_init($this->_curlOptions[CURLOPT_URL]);
 
            $fields = array(
                "from" => $this->defaultFromEmail,
            );
            if (isset($extras['from']) && !empty($extras['from'])) {
                $fields['from'] = & $extras['from'];
            }
            if(empty($fields['from'])) {
                throw new CHttpException('Send Email address can not be null');
            }
            if (empty($to) || strlen($to) < 5) {
                throw new CException('Receipients can not be empty');
            }
            $fields['to'] = & $to;
            $fields['subject'] = & $subject;
            if (!empty($html_body) && strlen($html_body) >= 5) {
                $fields['html'] = & $html_body;
            }
            if (isset($extras['text']) && !empty($extras['text'])) {
                $fields['text'] = & $extras['text'];
            } elseif (isset($fields['html'])) {
                $fields['text'] = strip_tags($fields['html']);
            }
            if (isset($extras['tags']) && !empty($extras['tags'])) {
                $fields['o:tag'] = & $extras['tags'];
            }
            $this->_curlOptions[CURLOPT_POSTFIELDS] = & $fields;
            curl_setopt_array($this->_ch, $this->_curlOptions);
 
            $response_with_headers = curl_exec($this->_ch);
            curl_close($this->_ch);
            return $response_with_headers;
        } catch (Exception $e) {
 
        }
        return NULL;
    }
 
}

<?php
    // ...
    'components' => array(
        'mailgun' => array(
            'class' => 'application.components.MailGun',
            'defaultFromEmail' => 'PM Online <no-reply@example.com>',
            'options' => array(
                        CURLOPT_URL => "https://api.mailgun.net/v2/<YOURDOMAIN.COM>/messages",
                CURLOPT_USERPWD => 'api:key-f82c1b4ebc17cd0afca13a4-21ca935a7',
            ),
            'pathLayouts' => 'application.views.layouts.emailer',
            'pathViews' => 'application.views.partials',
        ),
        // ...
    )
    // ...
?>

<?php
    $r = Yii::app()->mailgun->send($model->email, 'Hello',
        "<p>Testing from Main App, for some <small style=\"color: green;\">awesomness</span>!</p>");
    if($r) {
        $r = json_decode($r);
    }
?>