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BarboraFleg
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<?php
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/**
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* This file is part of the Nette Framework (https://nette.org)
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* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
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*/
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namespace Nette\Mail;
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use Nette;
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use Nette\Utils\Strings;
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/**
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* MIME message part.
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*
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* @property string $body
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*/
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class MimePart
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{
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use Nette\SmartObject;
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/** encoding */
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const ENCODING_BASE64 = 'base64',
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ENCODING_7BIT = '7bit',
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ENCODING_8BIT = '8bit',
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ENCODING_QUOTED_PRINTABLE = 'quoted-printable';
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/** @internal */
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const EOL = "\r\n";
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const LINE_LENGTH = 76;
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/** @var array */
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private $headers = [];
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/** @var array */
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private $parts = [];
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/** @var string */
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private $body = '';
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/**
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* Sets a header.
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* @param string
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* @param string|array value or pair email => name
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* @param bool
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* @return static
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*/
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public function setHeader($name, $value, $append = false)
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{
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if (!$name || preg_match('#[^a-z0-9-]#i', $name)) {
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throw new Nette\InvalidArgumentException("Header name must be non-empty alphanumeric string, '$name' given.");
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}
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if ($value == null) { // intentionally ==
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if (!$append) {
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unset($this->headers[$name]);
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}
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} elseif (is_array($value)) { // email
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$tmp = &$this->headers[$name];
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if (!$append || !is_array($tmp)) {
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$tmp = [];
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}
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foreach ($value as $email => $recipient) {
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if ($recipient === null) {
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// continue
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} elseif (!Strings::checkEncoding($recipient)) {
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Nette\Utils\Validators::assert($recipient, 'unicode', "header '$name'");
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} elseif (preg_match('#[\r\n]#', $recipient)) {
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throw new Nette\InvalidArgumentException('Name must not contain line separator.');
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}
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Nette\Utils\Validators::assert($email, 'email', "header '$name'");
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$tmp[$email] = $recipient;
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}
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} else {
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$value = (string) $value;
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if (!Strings::checkEncoding($value)) {
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throw new Nette\InvalidArgumentException('Header is not valid UTF-8 string.');
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}
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$this->headers[$name] = preg_replace('#[\r\n]+#', ' ', $value);
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}
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return $this;
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}
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/**
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* Returns a header.
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* @param string
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* @return mixed
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*/
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public function getHeader($name)
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{
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return isset($this->headers[$name]) ? $this->headers[$name] : null;
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}
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/**
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* Removes a header.
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* @param string
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* @return static
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*/
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public function clearHeader($name)
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{
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unset($this->headers[$name]);
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return $this;
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}
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/**
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* Returns an encoded header.
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* @param string
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* @return string|null
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*/
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public function getEncodedHeader($name)
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{
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$offset = strlen($name) + 2; // colon + space
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if (!isset($this->headers[$name])) {
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return null;
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} elseif (is_array($this->headers[$name])) {
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$s = '';
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foreach ($this->headers[$name] as $email => $name) {
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if ($name != null) { // intentionally ==
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$s .= self::encodeHeader($name, $offset, true);
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$email = " <$email>";
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}
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$s .= self::append($email . ',', $offset);
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}
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return ltrim(substr($s, 0, -1)); // last comma
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} elseif (preg_match('#^(\S+; (?:file)?name=)"(.*)"\z#', $this->headers[$name], $m)) { // Content-Disposition
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$offset += strlen($m[1]);
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return $m[1] . '"' . self::encodeHeader($m[2], $offset) . '"';
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} else {
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return ltrim(self::encodeHeader($this->headers[$name], $offset));
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}
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}
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/**
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* Returns all headers.
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* @return array
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*/
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public function getHeaders()
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{
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return $this->headers;
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}
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/**
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* Sets Content-Type header.
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* @param string
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* @param string
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* @return static
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*/
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public function setContentType($contentType, $charset = null)
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{
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$this->setHeader('Content-Type', $contentType . ($charset ? "; charset=$charset" : ''));
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return $this;
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}
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/**
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* Sets Content-Transfer-Encoding header.
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* @param string
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* @return static
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*/
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public function setEncoding($encoding)
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{
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$this->setHeader('Content-Transfer-Encoding', $encoding);
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return $this;
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}
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/**
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* Returns Content-Transfer-Encoding header.
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* @return string
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*/
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public function getEncoding()
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{
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return $this->getHeader('Content-Transfer-Encoding');
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}
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/**
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* Adds or creates new multipart.
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* @return self
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*/
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public function addPart(self $part = null)
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{
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return $this->parts[] = $part === null ? new self : $part;
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}
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/**
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* Sets textual body.
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* @param string
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* @return static
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*/
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public function setBody($body)
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{
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$this->body = (string) $body;
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return $this;
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}
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/**
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* Gets textual body.
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* @return string
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*/
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public function getBody()
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{
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return $this->body;
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}
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/********************* building ****************d*g**/
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/**
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* Returns encoded message.
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* @return string
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*/
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public function getEncodedMessage()
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{
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$output = '';
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$boundary = '--------' . Nette\Utils\Random::generate();
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foreach ($this->headers as $name => $value) {
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$output .= $name . ': ' . $this->getEncodedHeader($name);
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if ($this->parts && $name === 'Content-Type') {
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$output .= ';' . self::EOL . "\tboundary=\"$boundary\"";
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}
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$output .= self::EOL;
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}
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$output .= self::EOL;
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$body = $this->body;
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if ($body !== '') {
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switch ($this->getEncoding()) {
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case self::ENCODING_QUOTED_PRINTABLE:
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$output .= quoted_printable_encode($body);
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break;
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case self::ENCODING_BASE64:
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$output .= rtrim(chunk_split(base64_encode($body), self::LINE_LENGTH, self::EOL));
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break;
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case self::ENCODING_7BIT:
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$body = preg_replace('#[\x80-\xFF]+#', '', $body);
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// break omitted
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case self::ENCODING_8BIT:
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$body = str_replace(["\x00", "\r"], '', $body);
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$body = str_replace("\n", self::EOL, $body);
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$output .= $body;
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break;
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default:
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throw new Nette\InvalidStateException('Unknown encoding.');
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}
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}
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if ($this->parts) {
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if (substr($output, -strlen(self::EOL)) !== self::EOL) {
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$output .= self::EOL;
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}
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foreach ($this->parts as $part) {
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$output .= '--' . $boundary . self::EOL . $part->getEncodedMessage() . self::EOL;
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}
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$output .= '--' . $boundary . '--';
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}
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return $output;
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}
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/********************* QuotedPrintable helpers ****************d*g**/
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/**
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* Converts a 8 bit header to a string.
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* @param string
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* @param int
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* @param bool
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* @return string
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*/
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private static function encodeHeader($s, &$offset = 0, $quotes = false)
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{
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if (strspn($s, "!\"#$%&\'()*+,-./0123456789:;<>@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^`abcdefghijklmnopqrstuvwxyz{|}~=? _\r\n\t") === strlen($s)) {
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if ($quotes && preg_match('#[^ a-zA-Z0-9!\#$%&\'*+/?^_`{|}~-]#', $s)) { // RFC 2822 atext except =
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return self::append('"' . addcslashes($s, '"\\') . '"', $offset);
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}
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return self::append($s, $offset);
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}
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$o = '';
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if ($offset >= 55) { // maximum for iconv_mime_encode
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$o = self::EOL . "\t";
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$offset = 1;
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}
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$s = iconv_mime_encode(str_repeat(' ', $old = $offset), $s, [
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'scheme' => 'B', // Q is broken
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'input-charset' => 'UTF-8',
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'output-charset' => 'UTF-8',
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]);
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$offset = strlen($s) - strrpos($s, "\n");
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$s = str_replace("\n ", "\n\t", substr($s, $old + 2)); // adds ': '
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return $o . $s;
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}
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private static function append($s, &$offset = 0)
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{
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if ($offset + strlen($s) > self::LINE_LENGTH) {
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$offset = 1;
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$s = self::EOL . "\t" . $s;
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}
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$offset += strlen($s);
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return $s;
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}
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}
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