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https://git.friendi.ca/friendica/friendica-addons.git
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183 lines
4.7 KiB
PHP
183 lines
4.7 KiB
PHP
<?php
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namespace Sabre\VObject;
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/**
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* VCALENDAR/VCARD reader
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*
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* This class reads the vobject file, and returns a full element tree.
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*
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* TODO: this class currently completely works 'statically'. This is pointless,
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* and defeats OOP principals. Needs refactoring in a future version.
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*
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* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Reader {
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/**
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* Parses the file and returns the top component
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*
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* @param string $data
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* @return Element
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*/
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static function read($data) {
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// Normalizing newlines
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$data = str_replace(array("\r","\n\n"), array("\n","\n"), $data);
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$lines = explode("\n", $data);
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// Unfolding lines
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$lines2 = array();
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foreach($lines as $line) {
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// Skipping empty lines
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if (!$line) continue;
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if ($line[0]===" " || $line[0]==="\t") {
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$lines2[count($lines2)-1].=substr($line,1);
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} else {
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$lines2[] = $line;
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}
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}
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unset($lines);
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reset($lines2);
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return self::readLine($lines2);
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}
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/**
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* Reads and parses a single line.
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*
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* This method receives the full array of lines. The array pointer is used
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* to traverse.
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*
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* @param array $lines
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* @return Element
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*/
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static private function readLine(&$lines) {
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$line = current($lines);
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$lineNr = key($lines);
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next($lines);
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// Components
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if (stripos($line,"BEGIN:")===0) {
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$componentName = strtoupper(substr($line,6));
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$obj = Component::create($componentName);
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$nextLine = current($lines);
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while(stripos($nextLine,"END:")!==0) {
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$obj->add(self::readLine($lines));
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$nextLine = current($lines);
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if ($nextLine===false)
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throw new ParseException('Invalid VObject. Document ended prematurely.');
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}
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// Checking component name of the 'END:' line.
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if (substr($nextLine,4)!==$obj->name) {
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throw new ParseException('Invalid VObject, expected: "END:' . $obj->name . '" got: "' . $nextLine . '"');
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}
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next($lines);
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return $obj;
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}
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// Properties
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//$result = preg_match('/(?P<name>[A-Z0-9-]+)(?:;(?P<parameters>^(?<!:):))(.*)$/',$line,$matches);
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$token = '[A-Z0-9-\.]+';
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$parameters = "(?:;(?P<parameters>([^:^\"]|\"([^\"]*)\")*))?";
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$regex = "/^(?P<name>$token)$parameters:(?P<value>.*)$/i";
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$result = preg_match($regex,$line,$matches);
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if (!$result) {
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throw new ParseException('Invalid VObject, line ' . ($lineNr+1) . ' did not follow the icalendar/vcard format');
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}
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$propertyName = strtoupper($matches['name']);
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$propertyValue = preg_replace_callback('#(\\\\(\\\\|N|n|;|,))#',function($matches) {
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if ($matches[2]==='n' || $matches[2]==='N') {
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return "\n";
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} else {
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return $matches[2];
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}
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}, $matches['value']);
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$obj = Property::create($propertyName, $propertyValue);
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if ($matches['parameters']) {
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foreach(self::readParameters($matches['parameters']) as $param) {
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$obj->add($param);
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}
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}
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return $obj;
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}
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/**
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* Reads a parameter list from a property
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*
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* This method returns an array of Parameter
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*
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* @param string $parameters
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* @return array
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*/
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static private function readParameters($parameters) {
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$token = '[A-Z0-9-]+';
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$paramValue = '(?P<paramValue>[^\"^;]*|"[^"]*")';
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$regex = "/(?<=^|;)(?P<paramName>$token)(=$paramValue(?=$|;))?/i";
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preg_match_all($regex, $parameters, $matches, PREG_SET_ORDER);
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$params = array();
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foreach($matches as $match) {
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$value = isset($match['paramValue'])?$match['paramValue']:null;
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if (isset($value[0])) {
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// Stripping quotes, if needed
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if ($value[0] === '"') $value = substr($value,1,strlen($value)-2);
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} else {
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$value = '';
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}
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$value = preg_replace_callback('#(\\\\(\\\\|N|n|;|,))#',function($matches) {
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if ($matches[2]==='n' || $matches[2]==='N') {
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return "\n";
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} else {
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return $matches[2];
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}
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}, $value);
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$params[] = new Parameter($match['paramName'], $value);
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}
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return $params;
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}
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}
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