--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Parser/MimeDir.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,628 @@
+<?php
+
+namespace Sabre\VObject\Parser;
+
+use
+    Sabre\VObject\ParseException,
+    Sabre\VObject\EofException,
+    Sabre\VObject\Component,
+    Sabre\VObject\Property,
+    Sabre\VObject\Component\VCalendar,
+    Sabre\VObject\Component\VCard;
+
+/**
+ * MimeDir parser.
+ *
+ * This class parses iCalendar 2.0 and vCard 2.1, 3.0 and 4.0 files. This
+ * parser will return one of the following two objects from the parse method:
+ *
+ * Sabre\VObject\Component\VCalendar
+ * Sabre\VObject\Component\VCard
+ *
+ * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class MimeDir extends Parser {
+
+    /**
+     * The input stream.
+     *
+     * @var resource
+     */
+    protected $input;
+
+    /**
+     * Root component
+     *
+     * @var Component
+     */
+    protected $root;
+
+    /**
+     * Parses an iCalendar or vCard file
+     *
+     * Pass a stream or a string. If null is parsed, the existing buffer is
+     * used.
+     *
+     * @param string|resource|null $input
+     * @param int|null $options
+     * @return array
+     */
+    public function parse($input = null, $options = null) {
+
+        $this->root = null;
+        if (!is_null($input)) {
+
+            $this->setInput($input);
+
+        }
+
+        if (!is_null($options)) $this->options = $options;
+
+        $this->parseDocument();
+
+        return $this->root;
+
+    }
+
+    /**
+     * Sets the input buffer. Must be a string or stream.
+     *
+     * @param resource|string $input
+     * @return void
+     */
+    public function setInput($input) {
+
+        // Resetting the parser
+        $this->lineIndex = 0;
+        $this->startLine = 0;
+
+        if (is_string($input)) {
+            // Convering to a stream.
+            $stream = fopen('php://temp', 'r+');
+            fwrite($stream, $input);
+            rewind($stream);
+            $this->input = $stream;
+        } elseif (is_resource($input)) {
+            $this->input = $input;
+        } else {
+            throw new \InvalidArgumentException('This parser can only read from strings or streams.');
+        }
+
+    }
+
+    /**
+     * Parses an entire document.
+     *
+     * @return void
+     */
+    protected function parseDocument() {
+
+        $line = $this->readLine();
+
+        // BOM is ZERO WIDTH NO-BREAK SPACE (U+FEFF).
+        // It's 0xEF 0xBB 0xBF in UTF-8 hex.
+        if (   3 <= strlen($line)
+            && ord($line[0]) === 0xef
+            && ord($line[1]) === 0xbb
+            && ord($line[2]) === 0xbf) {
+            $line = substr($line, 3);
+        }
+
+        switch(strtoupper($line)) {
+            case 'BEGIN:VCALENDAR' :
+                $class = isset(VCalendar::$componentMap['VCALENDAR'])
+                    ? VCalendar::$componentMap[$name]
+                    : 'Sabre\\VObject\\Component\\VCalendar';
+                break;
+            case 'BEGIN:VCARD' :
+                $class = isset(VCard::$componentMap['VCARD'])
+                    ? VCard::$componentMap['VCARD']
+                    : 'Sabre\\VObject\\Component\\VCard';
+                break;
+            default :
+                throw new ParseException('This parser only supports VCARD and VCALENDAR files');
+        }
+
+        $this->root = new $class(array(), false);
+
+        while(true) {
+
+            // Reading until we hit END:
+            $line = $this->readLine();
+            if (strtoupper(substr($line,0,4)) === 'END:') {
+                break;
+            }
+            $result = $this->parseLine($line);
+            if ($result) {
+                $this->root->add($result);
+            }
+
+        }
+
+        $name = strtoupper(substr($line, 4));
+        if ($name!==$this->root->name) {
+            throw new ParseException('Invalid MimeDir file. expected: "END:' . $this->root->name . '" got: "END:' . $name . '"');
+        }
+
+    }
+
+    /**
+     * Parses a line, and if it hits a component, it will also attempt to parse
+     * the entire component
+     *
+     * @param string $line Unfolded line
+     * @return Node
+     */
+    protected function parseLine($line) {
+
+        // Start of a new component
+        if (strtoupper(substr($line, 0, 6)) === 'BEGIN:') {
+
+            $component = $this->root->createComponent(substr($line,6), array(), false);
+
+            while(true) {
+
+                // Reading until we hit END:
+                $line = $this->readLine();
+                if (strtoupper(substr($line,0,4)) === 'END:') {
+                    break;
+                }
+                $result = $this->parseLine($line);
+                if ($result) {
+                    $component->add($result);
+                }
+
+            }
+
+            $name = strtoupper(substr($line, 4));
+            if ($name!==$component->name) {
+                throw new ParseException('Invalid MimeDir file. expected: "END:' . $component->name . '" got: "END:' . $name . '"');
+            }
+
+            return $component;
+
+        } else {
+
+            // Property reader
+            $property = $this->readProperty($line);
+            if (!$property) {
+                // Ignored line
+                return false;
+            }
+            return $property;
+
+        }
+
+    }
+
+    /**
+     * We need to look ahead 1 line every time to see if we need to 'unfold'
+     * the next line.
+     *
+     * If that was not the case, we store it here.
+     *
+     * @var null|string
+     */
+    protected $lineBuffer;
+
+    /**
+     * The real current line number.
+     */
+    protected $lineIndex = 0;
+
+    /**
+     * In the case of unfolded lines, this property holds the line number for
+     * the start of the line.
+     *
+     * @var int
+     */
+    protected $startLine = 0;
+
+    /**
+     * Contains a 'raw' representation of the current line.
+     *
+     * @var string
+     */
+    protected $rawLine;
+
+    /**
+     * Reads a single line from the buffer.
+     *
+     * This method strips any newlines and also takes care of unfolding.
+     *
+     * @throws \Sabre\VObject\EofException
+     * @return string
+     */
+    protected function readLine() {
+
+        if (!is_null($this->lineBuffer)) {
+            $rawLine = $this->lineBuffer;
+            $this->lineBuffer = null;
+        } else {
+            do {
+                $eof = feof($this->input);
+
+                $rawLine = fgets($this->input);
+
+                if ($eof || (feof($this->input) && $rawLine===false)) {
+                    throw new EofException('End of document reached prematurely');
+                }
+                if ($rawLine === false) {
+                    throw new ParseException('Error reading from input stream');
+                }
+                $rawLine = rtrim($rawLine, "\r\n");
+            } while ($rawLine === ''); // Skipping empty lines
+            $this->lineIndex++;
+        }
+        $line = $rawLine;
+
+        $this->startLine = $this->lineIndex;
+
+        // Looking ahead for folded lines.
+        while (true) {
+
+            $nextLine = rtrim(fgets($this->input), "\r\n");
+            $this->lineIndex++;
+            if (!$nextLine) {
+                break;
+            }
+            if ($nextLine[0] === "\t" || $nextLine[0] === " ") {
+                $line .= substr($nextLine, 1);
+                $rawLine .= "\n " . substr($nextLine, 1);
+            } else {
+                $this->lineBuffer = $nextLine;
+                break;
+            }
+
+        }
+        $this->rawLine = $rawLine;
+        return $line;
+
+    }
+
+    /**
+     * Reads a property or component from a line.
+     *
+     * @return void
+     */
+    protected function readProperty($line) {
+
+        if ($this->options & self::OPTION_FORGIVING) {
+            $propNameToken = 'A-Z0-9\-\._\\/';
+        } else {
+            $propNameToken = 'A-Z0-9\-\.';
+        }
+
+        $paramNameToken = 'A-Z0-9\-';
+        $safeChar = '^";:,';
+        $qSafeChar = '^"';
+
+        $regex = "/
+            ^(?P<name> [$propNameToken]+ ) (?=[;:])        # property name
+            |
+            (?<=:)(?P<propValue> .+)$                      # property value
+            |
+            ;(?P<paramName> [$paramNameToken]+) (?=[=;:])  # parameter name
+            |
+            (=|,)(?P<paramValue>                           # parameter value
+                (?: [$safeChar]*) |
+                \"(?: [$qSafeChar]+)\"
+            ) (?=[;:,])
+            /xi";
+
+        //echo $regex, "\n"; die();
+        preg_match_all($regex, $line, $matches,  PREG_SET_ORDER);
+
+        $property = array(
+            'name' => null,
+            'parameters' => array(),
+            'value' => null
+        );
+
+        $lastParam = null;
+
+        /**
+         * Looping through all the tokens.
+         *
+         * Note that we are looping through them in reverse order, because if a
+         * sub-pattern matched, the subsequent named patterns will not show up
+         * in the result.
+         */
+        foreach($matches as $match) {
+
+            if (isset($match['paramValue'])) {
+                if ($match['paramValue'] && $match['paramValue'][0] === '"') {
+                    $value = substr($match['paramValue'], 1, -1);
+                } else {
+                    $value = $match['paramValue'];
+                }
+
+                $value = $this->unescapeParam($value);
+
+                if (is_null($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam] = $value;
+                } elseif (is_array($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam][] = $value;
+                } else {
+                    $property['parameters'][$lastParam] = array(
+                        $property['parameters'][$lastParam],
+                        $value
+                    );
+                }
+                continue;
+            }
+            if (isset($match['paramName'])) {
+                $lastParam = strtoupper($match['paramName']);
+                if (!isset($property['parameters'][$lastParam])) {
+                    $property['parameters'][$lastParam] = null;
+                }
+                continue;
+            }
+            if (isset($match['propValue'])) {
+                $property['value'] = $match['propValue'];
+                continue;
+            }
+            if (isset($match['name']) && $match['name']) {
+                $property['name'] = strtoupper($match['name']);
+                continue;
+            }
+
+            // @codeCoverageIgnoreStart
+            throw new \LogicException('This code should not be reachable');
+            // @codeCoverageIgnoreEnd
+
+        }
+
+        if (is_null($property['value'])) {
+            $property['value'] = '';
+        }
+        if (!$property['name']) {
+            if ($this->options & self::OPTION_IGNORE_INVALID_LINES) {
+                return false;
+            }
+            throw new ParseException('Invalid Mimedir file. Line starting at ' . $this->startLine . ' did not follow iCalendar/vCard conventions');
+        }
+
+        // vCard 2.1 states that parameters may appear without a name, and only
+        // a value. We can deduce the value based on it's name.
+        //
+        // Our parser will get those as parameters without a value instead, so
+        // we're filtering these parameters out first.
+        $namedParameters = array();
+        $namelessParameters = array();
+
+        foreach($property['parameters'] as $name=>$value) {
+            if (!is_null($value)) {
+                $namedParameters[$name] = $value;
+            } else {
+                $namelessParameters[] = $name;
+            }
+        }
+
+        $propObj = $this->root->createProperty($property['name'], null, $namedParameters);
+
+        foreach($namelessParameters as $namelessParameter) {
+            $propObj->add(null, $namelessParameter);
+        }
+
+        if (strtoupper($propObj['ENCODING']) === 'QUOTED-PRINTABLE') {
+            $propObj->setQuotedPrintableValue($this->extractQuotedPrintableValue());
+        } else {
+            $propObj->setRawMimeDirValue($property['value']);
+        }
+
+        return $propObj;
+
+    }
+
+    /**
+     * Unescapes a property value.
+     *
+     * vCard 2.1 says:
+     *   * Semi-colons must be escaped in some property values, specifically
+     *     ADR, ORG and N.
+     *   * Semi-colons must be escaped in parameter values, because semi-colons
+     *     are also use to separate values.
+     *   * No mention of escaping backslashes with another backslash.
+     *   * newlines are not escaped either, instead QUOTED-PRINTABLE is used to
+     *     span values over more than 1 line.
+     *
+     * vCard 3.0 says:
+     *   * (rfc2425) Backslashes, newlines (\n or \N) and comma's must be
+     *     escaped, all time time.
+     *   * Comma's are used for delimeters in multiple values
+     *   * (rfc2426) Adds to to this that the semi-colon MUST also be escaped,
+     *     as in some properties semi-colon is used for separators.
+     *   * Properties using semi-colons: N, ADR, GEO, ORG
+     *   * Both ADR and N's individual parts may be broken up further with a
+     *     comma.
+     *   * Properties using commas: NICKNAME, CATEGORIES
+     *
+     * vCard 4.0 (rfc6350) says:
+     *   * Commas must be escaped.
+     *   * Semi-colons may be escaped, an unescaped semi-colon _may_ be a
+     *     delimiter, depending on the property.
+     *   * Backslashes must be escaped
+     *   * Newlines must be escaped as either \N or \n.
+     *   * Some compound properties may contain multiple parts themselves, so a
+     *     comma within a semi-colon delimited property may also be unescaped
+     *     to denote multiple parts _within_ the compound property.
+     *   * Text-properties using semi-colons: N, ADR, ORG, CLIENTPIDMAP.
+     *   * Text-properties using commas: NICKNAME, RELATED, CATEGORIES, PID.
+     *
+     * Even though the spec says that commas must always be escaped, the
+     * example for GEO in Section 6.5.2 seems to violate this.
+     *
+     * iCalendar 2.0 (rfc5545) says:
+     *   * Commas or semi-colons may be used as delimiters, depending on the
+     *     property.
+     *   * Commas, semi-colons, backslashes, newline (\N or \n) are always
+     *     escaped, unless they are delimiters.
+     *   * Colons shall not be escaped.
+     *   * Commas can be considered the 'default delimiter' and is described as
+     *     the delimiter in cases where the order of the multiple values is
+     *     insignificant.
+     *   * Semi-colons are described as the delimiter for 'structured values'.
+     *     They are specifically used in Semi-colons are used as a delimiter in
+     *     REQUEST-STATUS, RRULE, GEO and EXRULE. EXRULE is deprecated however.
+     *
+     * Now for the parameters
+     *
+     * If delimiter is not set (null) this method will just return a string.
+     * If it's a comma or a semi-colon the string will be split on those
+     * characters, and always return an array.
+     *
+     * @param string $input
+     * @param string $delimiter
+     * @return string|string[]
+     */
+    static public function unescapeValue($input, $delimiter = ';') {
+
+        $regex = '#  (?: (\\\\ (?: \\\\ | N | n | ; | , ) )';
+        if ($delimiter) {
+            $regex .= ' | (' . $delimiter . ')';
+        }
+        $regex .= ') #x';
+
+        $matches = preg_split($regex, $input, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
+
+        $resultArray = array();
+        $result = '';
+
+        foreach($matches as $match) {
+
+            switch ($match) {
+                case '\\\\' :
+                    $result .='\\';
+                    break;
+                case '\N' :
+                case '\n' :
+                    $result .="\n";
+                    break;
+                case '\;' :
+                    $result .=';';
+                    break;
+                case '\,' :
+                    $result .=',';
+                    break;
+                case $delimiter :
+                    $resultArray[] = $result;
+                    $result = '';
+                    break;
+                default :
+                    $result .= $match;
+                    break;
+
+            }
+
+        }
+
+        $resultArray[] = $result;
+        return $delimiter ? $resultArray : $result;
+
+    }
+
+    /**
+     * Unescapes a parameter value.
+     *
+     * vCard 2.1:
+     *   * Does not mention a mechanism for this. In addition, double quotes
+     *     are never used to wrap values.
+     *   * This means that parameters can simply not contain colons or
+     *     semi-colons.
+     *
+     * vCard 3.0 (rfc2425, rfc2426):
+     *   * Parameters _may_ be surrounded by double quotes.
+     *   * If this is not the case, semi-colon, colon and comma may simply not
+     *     occur (the comma used for multiple parameter values though).
+     *   * If it is surrounded by double-quotes, it may simply not contain
+     *     double-quotes.
+     *   * This means that a parameter can in no case encode double-quotes, or
+     *     newlines.
+     *
+     * vCard 4.0 (rfc6350)
+     *   * Behavior seems to be identical to vCard 3.0
+     *
+     * iCalendar 2.0 (rfc5545)
+     *   * Behavior seems to be identical to vCard 3.0
+     *
+     * Parameter escaping mechanism (rfc6868) :
+     *   * This rfc describes a new way to escape parameter values.
+     *   * New-line is encoded as ^n
+     *   * ^ is encoded as ^^.
+     *   * " is encoded as ^'
+     *
+     * @param string $input
+     * @return void
+     */
+    private function unescapeParam($input) {
+
+        return
+            preg_replace_callback(
+                '#(\^(\^|n|\'))#',
+                function($matches) {
+                    switch($matches[2]) {
+                        case 'n' :
+                            return "\n";
+                        case '^' :
+                            return '^';
+                        case '\'' :
+                            return '"';
+
+                    // @codeCoverageIgnoreStart
+                    }
+                    // @codeCoverageIgnoreEnd
+                },
+                $input
+            );
+    }
+
+    /**
+     * Gets the full quoted printable value.
+     *
+     * We need a special method for this, because newlines have both a meaning
+     * in vCards, and in QuotedPrintable.
+     *
+     * This method does not do any decoding.
+     *
+     * @return string
+     */
+    private function extractQuotedPrintableValue() {
+
+        // We need to parse the raw line again to get the start of the value.
+        //
+        // We are basically looking for the first colon (:), but we need to
+        // skip over the parameters first, as they may contain one.
+        $regex = '/^
+            (?: [^:])+ # Anything but a colon
+            (?: "[^"]")* # A parameter in double quotes
+            : # start of the value we really care about
+            (.*)$
+        /xs';
+
+        preg_match($regex, $this->rawLine, $matches);
+
+        $value = $matches[1];
+        // Removing the first whitespace character from every line. Kind of
+        // like unfolding, but we keep the newline.
+        $value = str_replace("\n ", "\n", $value);
+
+        // Microsoft products don't always correctly fold lines, they may be
+        // missing a whitespace. So if 'forgiving' is turned on, we will take
+        // those as well.
+        if ($this->options & self::OPTION_FORGIVING) {
+            while(substr($value,-1) === '=') {
+                // Reading the line
+                $this->readLine();
+                // Grabbing the raw form
+                $value.="\n" . $this->rawLine;
+            }
+        }
+
+        return $value;
+
+    }
+
+}