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diff --git a/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Preferences.php b/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Preferences.php
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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.
+ */
+
+/**
+ * Changes some global preference settings in Swift Mailer.
+ *
+ * @author Chris Corbyn
+ */
+class Swift_Preferences
+{
+ /** Singleton instance */
+ private static $_instance = null;
+
+ /** Constructor not to be used */
+ private function __construct()
+ {
+ }
+
+ /**
+ * Gets the instance of Preferences.
+ *
+ * @return self
+ */
+ public static function getInstance()
+ {
+ if (!isset(self::$_instance)) {
+ self::$_instance = new self();
+ }
+
+ return self::$_instance;
+ }
+
+ /**
+ * Set the default charset used.
+ *
+ * @param string $charset
+ *
+ * @return $this
+ */
+ public function setCharset($charset)
+ {
+ Swift_DependencyContainer::getInstance()->register('properties.charset')->asValue($charset);
+
+ return $this;
+ }
+
+ /**
+ * Set the directory where temporary files can be saved.
+ *
+ * @param string $dir
+ *
+ * @return $this
+ */
+ public function setTempDir($dir)
+ {
+ Swift_DependencyContainer::getInstance()->register('tempdir')->asValue($dir);
+
+ return $this;
+ }
+
+ /**
+ * Set the type of cache to use (i.e. "disk" or "array").
+ *
+ * @param string $type
+ *
+ * @return $this
+ */
+ public function setCacheType($type)
+ {
+ Swift_DependencyContainer::getInstance()->register('cache')->asAliasOf(sprintf('cache.%s', $type));
+
+ return $this;
+ }
+
+ /**
+ * Set the QuotedPrintable dot escaper preference.
+ *
+ * @param bool $dotEscape
+ *
+ * @return $this
+ */
+ public function setQPDotEscape($dotEscape)
+ {
+ $dotEscape = !empty($dotEscape);
+ Swift_DependencyContainer::getInstance()
+ ->register('mime.qpcontentencoder')
+ ->asNewInstanceOf('Swift_Mime_ContentEncoder_QpContentEncoder')
+ ->withDependencies(array('mime.charstream', 'mime.bytecanonicalizer'))
+ ->addConstructorValue($dotEscape);
+
+ return $this;
+ }
+}