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+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Date MIME Header for Swift Mailer.
+ *
+ * @author Chris Corbyn
+ */
+class Swift_Mime_Headers_DateHeader extends Swift_Mime_Headers_AbstractHeader
+{
+ /**
+ * The UNIX timestamp value of this Header.
+ *
+ * @var int
+ */
+ private $_timestamp;
+
+ /**
+ * Creates a new DateHeader with $name and $timestamp.
+ *
+ * Example:
+ * <code>
+ * <?php
+ * $header = new Swift_Mime_Headers_DateHeader('Date', time());
+ * ?>
+ * </code>
+ *
+ * @param string $name of Header
+ * @param Swift_Mime_Grammar $grammar
+ */
+ public function __construct($name, Swift_Mime_Grammar $grammar)
+ {
+ $this->setFieldName($name);
+ parent::__construct($grammar);
+ }
+
+ /**
+ * Get the type of Header that this instance represents.
+ *
+ * @see TYPE_TEXT, TYPE_PARAMETERIZED, TYPE_MAILBOX
+ * @see TYPE_DATE, TYPE_ID, TYPE_PATH
+ *
+ * @return int
+ */
+ public function getFieldType()
+ {
+ return self::TYPE_DATE;
+ }
+
+ /**
+ * Set the model for the field body.
+ *
+ * This method takes a UNIX timestamp.
+ *
+ * @param int $model
+ */
+ public function setFieldBodyModel($model)
+ {
+ $this->setTimestamp($model);
+ }
+
+ /**
+ * Get the model for the field body.
+ *
+ * This method returns a UNIX timestamp.
+ *
+ * @return mixed
+ */
+ public function getFieldBodyModel()
+ {
+ return $this->getTimestamp();
+ }
+
+ /**
+ * Get the UNIX timestamp of the Date in this Header.
+ *
+ * @return int
+ */
+ public function getTimestamp()
+ {
+ return $this->_timestamp;
+ }
+
+ /**
+ * Set the UNIX timestamp of the Date in this Header.
+ *
+ * @param int $timestamp
+ */
+ public function setTimestamp($timestamp)
+ {
+ if (null !== $timestamp) {
+ $timestamp = (int) $timestamp;
+ }
+ $this->clearCachedValueIf($this->_timestamp != $timestamp);
+ $this->_timestamp = $timestamp;
+ }
+
+ /**
+ * Get the string value of the body in this Header.
+ *
+ * This is not necessarily RFC 2822 compliant since folding white space will
+ * not be added at this stage (see {@link toString()} for that).
+ *
+ * @see toString()
+ *
+ * @return string
+ */
+ public function getFieldBody()
+ {
+ if (!$this->getCachedValue()) {
+ if (isset($this->_timestamp)) {
+ $this->setCachedValue(date('r', $this->_timestamp));
+ }
+ }
+
+ return $this->getCachedValue();
+ }
+}