Swift_Mime_Headers_AbstractHeader

Complexity

Total Complexity

61

Size/Duplication

Total Lines	507
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Test Coverage

Coverage

97.78%

Importance

Changes	12
Bugs	2	Features	0

27 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	setCharset()	0	12	4
A	getCharset()	0	4	1
A	setLanguage()	0	7	3
A	getLanguage()	0	4	1
A	setEncoder()	0	7	1
A	getEncoder()	0	4	1
A	getFieldName()	0	4	1
A	setMaxLineLength()	0	12	3
A	getMaxLineLength()	0	4	1
A	toString()	0	4	1
A	__toString()	0	4	1
A	setFieldName()	0	4	1
A	createPhrase()	0	22	3
A	escapeSpecials()	0	8	2
B	encodeWords()	0	29	5
A	tokenNeedsEncoding()	0	8	2
B	getEncodableWordTokens()	0	24	5
B	getTokenAsEncodedWord()	0	32	5
A	generateTokenLines()	0	4	1
A	setCachedValue()	0	4	1
A	getCachedValue()	0	4	1
A	clearCachedValue()	0	4	1
A	clearCachedValueIf()	0	6	2
A	toTokens()	0	18	4
C	_tokensToString()	0	36	7
A	__clone()	0	6	2

<?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.
 */

/**
 * An abstract base MIME Header.
 *
 * @author Chris Corbyn
 */
abstract class Swift_Mime_Headers_AbstractHeader implements Swift_Mime_Header

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
    const PHRASE_PATTERN = '(?:(?:(?:(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))*(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))|(?:(?:[ \t]*(?:\r\n))?[ \t])))?[a-zA-Z0-9!#\$%&\'\*\+\-\/=\?\^_`\{\}\|~]+(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))*(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))|(?:(?:[ \t]*(?:\r\n))?[ \t])))?)|(?:(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))*(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))|(?:(?:[ \t]*(?:\r\n))?[ \t])))?"((?:(?:[ \t]*(?:\r\n))?[ \t])?(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21\x23-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])))*(?:(?:[ \t]*(?:\r\n))?[ \t])?"(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))*(?:(?:(?:(?:[ \t]*(?:\r\n))?[ \t])?(\((?:(?:(?:[ \t]*(?:\r\n))?[ \t])|(?:(?:[\x01-\x08\x0B\x0C\x0E-\x19\x7F]|[\x21-\x27\x2A-\x5B\x5D-\x7E])|(?:\\[\x00-\x08\x0B\x0C\x0E-\x7F])|(?1)))*(?:(?:[ \t]*(?:\r\n))?[ \t])?\)))|(?:(?:[ \t]*(?:\r\n))?[ \t])))?))+?)';

    /**
     * The name of this Header.
     *
     * @var string
     */
    private $_name;

    /**
     * The Encoder used to encode this Header.
     *
     * @var Swift_Encoder|Swift_Mime_ContentEncoder
     */
    private $_encoder;

    /**
     * The maximum length of a line in the header.
     *
     * @var int
     */
    private $_lineLength = 78;

    /**
     * The language used in this Header.
     *
     * @var string|null
     */
    private $_lang;

    /**
     * The character set of the text in this Header.
     *
     * @var string
     */
    private $_charset = 'utf-8';

    /**
     * The value of this Header, cached.
     *
     * @var string|null
     */
    private $_cachedValue;

    /**
     * Creates a new Header.
     */
    public function __construct()
    {
    }

    /**
     * Set the character set used in this Header.
     *
     * @param string $charset
     */
    public function setCharset($charset)
    {
        if ($charset && $charset !== $this->_charset) {
            $this->clearCachedValue();

            $this->_charset = $charset;

            if ($this->_encoder) {
                $this->_encoder->charsetChanged($charset);
            }
        }
    }

    /**
     * Get the character set used in this Header.
     *
     * @return string
     */
    public function getCharset()
    {
        return $this->_charset;
    }

    /**
     * Set the language used in this Header.
     *
     * For example, for US English, 'en-us'.
     * This can be unspecified.
     *
     * @param string $lang
     */
    public function setLanguage($lang)
    {
        if ($lang && $this->_lang !== $lang) {
            $this->clearCachedValue();
            $this->_lang = (string)$lang;
        }
    }

    /**
     * Get the language used in this Header.
     *
     * @return string
     */
    public function getLanguage()
    {
        return $this->_lang;
    }

    /**
     * Set the encoder used for encoding the header.
     *
     * @param Swift_Mime_HeaderEncoder $encoder
     */
    public function setEncoder(Swift_Mime_HeaderEncoder $encoder)
    {
        $this->_encoder = $encoder;
        $this->_encoder->charsetChanged($this->_charset);

        $this->setCachedValue(null);
    }

    /**
     * Get the encoder used for encoding this Header.
     *
     * @return Swift_Mime_HeaderEncoder
     */
    public function getEncoder()
    {
        return $this->_encoder;
    }

    /**
     * Get the name of this header (e.g. charset).
     *
     * @return string
     */
    public function getFieldName()
    {
        return $this->_name;
    }

    /**
     * Set the maximum length of lines in the header (excluding EOL).
     *
     * @param int $lineLength
     *
     * @return bool
     */
    public function setMaxLineLength($lineLength)
    {
        if ($lineLength && $this->_lineLength !== $lineLength) {
            $this->clearCachedValue();

            $this->_lineLength = (int)$lineLength;

            return true;
        }

        return false;
    }

    /**
     * Get the maximum permitted length of lines in this Header.
     *
     * @return int
     */
    public function getMaxLineLength()
    {
        return $this->_lineLength;
    }

    /**
     * Get this Header rendered as a RFC 2822 compliant string.
     *
     * @return string
     */
    public function toString()
    {
        return $this->_tokensToString($this->toTokens());
    }

    /**
     * Returns a string representation of this object.
     *
     * @return string
     *
     * @see toString()
     */
    public function __toString()
    {
        return $this->toString();
    }

    /**
     * Set the name of this Header field.
     *
     * @param string $name
     */
    protected function setFieldName($name)
    {
        $this->_name = $name;
    }

    /**
     * Produces a compliant, formatted RFC 2822 'phrase' based on the string given.
     *
     * @param Swift_Mime_Header        $header
     * @param string                   $string  as displayed
     *
     * @return string
     */
    protected function createPhrase(Swift_Mime_Header $header, $string)
    {
        // Treat token as exactly what was given.
        $phraseStr = $string;

        // If it's not valid ...
        if (!preg_match('/^' . self::PHRASE_PATTERN . '$/D', $phraseStr)) {

            if (preg_match('/^[\x00-\x08\x0B\x0C\x0E-\x7F]*$/D', $phraseStr)) {
                // ... but it is just ascii text, try escaping some characters
                $phraseStr = $this->escapeSpecials($phraseStr, array('"'));
            } else {
                // ... otherwise it needs encoding
                $phraseStr = $this->encodeWords($header, $string);
            }

            // ... and make it a quoted-string.
            $phraseStr = '"' . $phraseStr . '"';
        }

        return $phraseStr;
    }

    /**
     * Escape special characters in a string (convert to quoted-pairs).
     *
     * @param string   $token
     * @param string[] $include additional chars to escape
     *
     * @return string
     */
    protected function escapeSpecials($token, array $include = array())
    {
        foreach (array_merge(array('\\'), $include) as $char) {
            $token = str_replace($char, '\\' . $char, $token);
        }

        return $token;
    }

    /**
     * Encode needed word tokens within a string of input.
     *
     * @param Swift_Mime_Header|Swift_Mime_Headers_AbstractHeader $header
     * @param string                                              $input
     *
     * @return string
     */
    protected function encodeWords(Swift_Mime_Header $header, $input)
    {
        $value = '';

        $tokens = $this->getEncodableWordTokens($input);

        foreach ($tokens as $token) {
            // See RFC 2822, Sect 2.2 (really 2.2 ?? TODO ?)

38% of this comment could be valid code. Did you maybe forget this after debugging?

            if ($this->tokenNeedsEncoding($token)) {
                // Don't encode starting WSP
                $firstChar = substr($token, 0, 1);
                switch ($firstChar) {
                    case ' ':
                    case "\t":
                        $value .= $firstChar;
                        $token = substr($token, 1);
                }

                $usedLength = strlen($header->getFieldName() . ': ') + strlen($value);
                $value .= $this->getTokenAsEncodedWord($token, $usedLength);

                $header->setMaxLineLength(74); // Forcefully override (we need to save two chars for quoting)

It seems like you code against a concrete implementation and not the interface Swift_Mime_Header as the method setMaxLineLength() does only exist in the following implementations of said interface: Swift_Mime_Headers_AbstractHeader, Swift_Mime_Headers_DateHeader, Swift_Mime_Headers_IdentificationHeader, Swift_Mime_Headers_MailboxHeader, Swift_Mime_Headers_ParameterizedHeader, Swift_Mime_Headers_PathHeader, Swift_Mime_Headers_UnstructuredHeader.

            } else {
                $value .= $token;
            }
        }

        return $value;
    }

    /**
     * Test if a token needs to be encoded or not.
     *
     * @param string $token
     *
     * @return integer
     */
    protected function tokenNeedsEncoding($token)
    {
        if (preg_match('~[\x00-\x08\x10-\x19\x7F-\xFF\r\n]~', $token)) {
            return 1;
        } else {
            return 0;
        }
    }

    /**
     * Splits a string into tokens in blocks of words which can be encoded quickly.
     *
     * @param string $string
     *
     * @return string[]
     */
    protected function getEncodableWordTokens($string)
    {
        $tokens = array();

        $encodedToken = '';
        // Split at all whitespace boundaries
        foreach (preg_split('~(?=[\t ])~', $string) as $token) {
            if ($this->tokenNeedsEncoding($token)) {
                $encodedToken .= $token;
            } else {
                if ($encodedToken !== '') {
                    $tokens[] = $encodedToken;
                    $encodedToken = '';
                }
                $tokens[] = $token;
            }
        }

        if ($encodedToken !== '') {
            $tokens[] = $encodedToken;
        }

        return $tokens;
    }

    /**
     * Get a token as an encoded word for safe insertion into headers.
     *
     * @param string $token           token to encode
     * @param int    $firstLineOffset optional
     *
     * @return string
     */
    protected function getTokenAsEncodedWord($token, $firstLineOffset = 0)
    {
        // Adjust $firstLineOffset to account for space needed for syntax.

        $charsetDecl = $this->_charset;

        if ($this->_lang) {

The expression $this->_lang of type string|null is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== null instead.

            $charsetDecl .= '*' . $this->_lang;
        }

        $encodingWrapperLength = strlen('=?' . $charsetDecl . '?' . $this->_encoder->getName() . '??=');

It seems like you code against a concrete implementation and not the interface Swift_Encoder as the method getName() does only exist in the following implementations of said interface: Swift_Mime_ContentEncoder_Base64ContentEncoder, Swift_Mime_ContentEncoder_NativeQpContentEncoder, Swift_Mime_ContentEncoder_PlainContentEncoder, Swift_Mime_ContentEncoder_QpContentEncoder, Swift_Mime_ContentEncoder_QpContentEncoderProxy, Swift_Mime_ContentEncoder_RawContentEncoder, Swift_Mime_HeaderEncoder_Base64HeaderEncoder, Swift_Mime_HeaderEncoder_QpHeaderEncoder.

        if ($firstLineOffset >= 75) {
            // Does this logic need to be here?
            $firstLineOffset = 0;
        }

        /** @noinspection PhpMethodParametersCountMismatchInspection */
        $encodedTextLines = explode(
            "\r\n",
            $this->_encoder->encodeString($token, $firstLineOffset, 75 - $encodingWrapperLength, $this->_charset)

The call to Swift_Encoder::encodeString() has too many arguments starting with $this->_charset.

        );

        if (Swift::strtolowerWithStaticCache($this->_charset) !== 'iso-2022-jp') {
            // special encoding for iso-2022-jp using mb_encode_mimeheader
            foreach ($encodedTextLines as $lineNum => $line) {
                $encodedTextLines[$lineNum] = '=?' . $charsetDecl . '?' . $this->_encoder->getName() . '?' . $line . '?=';

It seems like you code against a concrete implementation and not the interface Swift_Encoder as the method getName() does only exist in the following implementations of said interface: Swift_Mime_ContentEncoder_Base64ContentEncoder, Swift_Mime_ContentEncoder_NativeQpContentEncoder, Swift_Mime_ContentEncoder_PlainContentEncoder, Swift_Mime_ContentEncoder_QpContentEncoder, Swift_Mime_ContentEncoder_QpContentEncoderProxy, Swift_Mime_ContentEncoder_RawContentEncoder, Swift_Mime_HeaderEncoder_Base64HeaderEncoder, Swift_Mime_HeaderEncoder_QpHeaderEncoder.

            }
        }

        return implode("\r\n ", $encodedTextLines);
    }

    /**
     * Generates tokens from the given string which include CRLF as individual tokens.
     *
     * @param string $token
     *
     * @return string[]
     */
    protected function generateTokenLines($token)
    {
        return preg_split('~(\r\n)~', $token, -1, PREG_SPLIT_DELIM_CAPTURE);
    }

    /**
     * Set a value into the cache.
     *
     * @param string $value
     */
    protected function setCachedValue($value)
    {
        $this->_cachedValue = $value;
    }

    /**
     * Get the value in the cache.
     *
     * @return string
     */
    protected function getCachedValue()
    {
        return $this->_cachedValue;
    }

    private function clearCachedValue()
    {
        $this->setCachedValue(null);
    }

    /**
     * Clear the cached value if $condition is met.
     *
     * @param bool $condition
     */
    protected function clearCachedValueIf($condition)
    {
        if (true === $condition) {
            $this->clearCachedValue();
        }
    }

    /**
     * Generate a list of all tokens in the final header.
     *
     * @param string $string The string to tokenize
     *
     * @return array An array of tokens as strings
     */
    protected function toTokens($string = null)
    {
        if (null === $string) {
            $string = $this->getFieldBody();
        }

        $tokens = array();

        // Generate atoms; split at all invisible boundaries followed by WSP
        foreach (preg_split('~(?=[ \t])~', $string) as $token) {
            $newTokens = $this->generateTokenLines($token);
            foreach ($newTokens as $newToken) {
                $tokens[] = $newToken;
            }
        }

        return $tokens;
    }

    /**
     * Takes an array of tokens which appear in the header and turns them into
     * an RFC 2822 compliant string, adding FWSP where needed.
     *
     * @param string[] $tokens
     *
     * @return string
     */
    private function _tokensToString(array $tokens)
    {
        $lineCount = 0;
        $headerLines = array();
        $headerLines[] = $this->_name . ': ';
        $currentLine = &$headerLines[$lineCount++];

        // Build all tokens back into compliant header
        foreach ($tokens as $i => $token) {
            // Line longer than specified maximum or token was just a new line
            if (
                ("\r\n" === $token)
                ||
                (
                    strlen($currentLine) > 0
                    &&
                    (
                        $i > 0
                        &&
                        strlen($currentLine . $token) > $this->_lineLength
                    )
                )
            ) {
                $headerLines[] = '';
                $currentLine = &$headerLines[$lineCount++];
            }

            // Append token to the line
            if ("\r\n" !== $token) {
                $currentLine .= $token;
            }
        }

        // Implode with FWS (RFC 2822, 2.2.3)

38% of this comment could be valid code. Did you maybe forget this after debugging?

        return implode("\r\n", $headerLines) . "\r\n";
    }

    /**
     * Make a deep copy of object
     */
    public function __clone()
    {
        if ($this->_encoder !== null) {
            $this->_encoder = clone $this->_encoder;
        }
    }
}