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<?php
/* --------------------------------------------------------------
   EmailWrite.php 2015-01-29 gm
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

MainFactory::load_class('EmailWriterInterface');

require_once __DIR__ . '/../../../../Shared/Utility/HtmlUtilityTrait.inc.php';

/**
 * Class EmailWriter
 *
 * Writes email records in the database (insert/update operations).
 *
 * @category   System
 * @package    Email
 * @subpackage Repository
 */
class EmailWriter implements EmailWriterInterface
{
    use HtmlUtilityTrait;
    
    /**
     * Query builder.
     * @var CI_DB_query_builder
     */
    protected $db;


    /**
     * Class Constructor
     *
     * @param CI_DB_query_builder $db Query builder.
     */
    public function __construct(CI_DB_query_builder $db)
    {
        $this->db = $db;
    }


    /**
     * Save (insert/update) an email record.
     *
     * @param EmailInterface $email E-Mail.
     */
    public function write(EmailInterface $email)
    {
        if($email->getId() === null)
        {
            $this->_insert($email);
        }
        else
        {
            $this->_update($email);
        }

        $this->_writeContactsAndAttachments($email);
    }


    /**
     * Inserts an email record to the database.
     *
     * @param EmailInterface $email E-Mail.
     */
    protected function _insert(EmailInterface $email)
    {
        // Insert Email Record
        $record = array(
            'subject'       => (string)$email->getSubject(),
            'content_plain' => (string)$email->getContentPlain(),
            'content_html'  => $this->htmlentitiesWrapper((string)$email->getContentHtml()),
            'is_pending'    => (int)$email->isPending(),
            'creation_date' => $email->getCreationDate()->format('Y-m-d H:i:s')
        );
        
        if($email->getSentDate() !== null)
        {
            $record['sent_date'] = $email->getSentDate()->format('Y-m-d H:i:s');
        }
        
        $this->db->insert('emails', $record);
        $email->setId(new IdType($this->db->insert_id()));
    }


    /**
     * Updates an email record from the database.
     *
     * @param EmailInterface $email E-Mail.
     */
    protected function _update(EmailInterface $email)
    {
        // Update Email Record
        $record = array(
            'subject'       => (string)$email->getSubject(),
            'content_plain' => (string)$email->getContentPlain(),
            'content_html'  => $this->htmlentitiesWrapper((string)$email->getContentHtml()),
            'is_pending'    => (int)$email->isPending(),
            'creation_date' => $email->getCreationDate()->format('Y-m-d H:i:s')
        );

        if($email->getSentDate() !== null)
        {
            $record['sent_date'] = $email->getSentDate()->format('Y-m-d H:i:s');
        }
        
        $this->db->update('emails', $record, array('email_id' => (int)(string)$email->getId()));
    }


    /**
     * Writes email contacts and attachments.
     *
     * It will delete old records (if exist) and re-insert them so that the
     * data state will represent the object state.
     *
     * @param EmailInterface $email Contains the email information.
     */
    protected function _writeContactsAndAttachments(EmailInterface $email)
    {
        if($email->getId() == null)
        {
            throw new UnexpectedValueException('$email object does not have an ID set.');
        }

        $emailId = (int)(string)$email->getId();

        // Remove old records from database.
        $this->db->delete('email_contacts', array('email_id' => $emailId));
        $this->db->delete('email_attachments', array('email_id' => $emailId));

        // Insert Email Contacts
        $contacts = array_merge($email->getBcc()->getArray(), $email->getCc()->getArray(),
                                array($email->getSender(), $email->getRecipient(), $email->getReplyTo()));
        foreach($contacts as $contact)
        {
            if($contact == null)
            {
                continue;
            }
            $record = array(
                'email_id'      => $emailId,
                'email_address' => (string)$contact->getEmailAddress(),
                'contact_type'  => (string)$contact->getContactType(),
                'contact_name'  => (string)$contact->getContactName()
            );
            $this->db->insert('email_contacts', $record);
        }

        // Insert Email Attachments
        foreach($email->getAttachments()->getArray() as $attachment)
        {
            $record = array(
                'email_id' => $emailId,
                'path'     => (string)$attachment->getPath(false), // get relative
                'name'     => (string)$attachment->getName()
            );
            $this->db->insert('email_attachments', $record);
        }
    }
}