/**
* Parse a string containing vCalendar data.
*
* @access private
* @param String $data The data to parse
*
*/
function parse($data, $ignore)
{
global $_calendar_error, $PERS_TERMIN_KAT;
// match categories
$studip_categories = array();
$i = 1;
foreach ($PERS_TERMIN_KAT as $cat) {
$studip_categories[strtolower($cat['name'])] = $i++;
}
// Unfold any folded lines
// the CR is optional for files imported from Korganizer (non-standard)
$data = preg_replace('/\x0D?\x0A[\x20\x09]/', '', $data);
// UTF-8 decoding
$v_calendar = utf8_decode($data);
if (!preg_match('/BEGIN:VCALENDAR(\r\n|\r|\n)([\W\w]*)END:VCALENDAR\r?\n?/', $v_calendar, $matches)) {
$_calendar_error->throwError(ErrorHandler::ERROR_CRITICAL, _("Die Import-Datei ist keine gültige iCalendar-Datei!"));
return false;
}
// client identifier
if (!$this->_parseClientIdentifier($matches[2])) {
return false;
}
// All sub components
if (!preg_match_all('/BEGIN:VEVENT(\r\n|\r|\n)([\w\W]*?)END:VEVENT(\r\n|\r|\n)/', $matches[2], $v_events)) {
$_calendar_error->throwError(ErrorHandler::ERROR_MESSAGE, _("Die importierte Datei enthält keine Termine."));
return true;
}
if ($this->count) {
$this->count = 0;
}
foreach ($v_events[2] as $v_event) {
$properties['CLASS'] = 'PRIVATE';
// Parse the remain attributes
if (preg_match_all('/(.*):(.*)(\r|\n)+/', $v_event, $matches)) {
$properties = array();
$check = array();
foreach ($matches[0] as $property) {
preg_match('/([^;^:]*)((;[^:]*)?):(.*)/', $property, $parts);
$tag = $parts[1];
$value = $parts[4];
$params = array();
// skip seminar events
if ((!$this->import_sem) && $tag == 'UID') {
if (strpos($value, 'Stud.IP-SEM') === 0) {
continue 2;
}
}
if (!empty($parts[2])) {
preg_match_all('/;(([^;=]*)(=([^;]*))?)/', $parts[2], $param_parts);
foreach ($param_parts[2] as $key => $param_name)
$params[strtoupper($param_name)] = strtoupper($param_parts[4][$key]);
if ($params['ENCODING']) {
switch ($params['ENCODING']) {
case 'QUOTED-PRINTABLE':
$value = $this->_qp_decode($value);
break;
case 'BASE64':
$value = base64_decode($value);
break;
}
}
}
switch ($tag) {
// text fields
case 'DESCRIPTION':
case 'SUMMARY':
case 'LOCATION':
$value = preg_replace('/\\\\,/', ',', $value);
$value = preg_replace('/\\\\n/', "\n", $value);
$properties[$tag] = trim($value);
break;
case 'CATEGORIES':
$categories = array();
$properties['STUDIP_CATEGORY'] = null;
foreach (explode(',', $value) as $category) {
if (!$studip_categories[strtolower($category)]) {
$categories[] = $category;
} else if (!$properties['STUDIP_CATEGORY']) {
$properties['STUDIP_CATEGORY']
= $studip_categories[strtolower($category)];
}
}
$properties[$tag] = implode(',', $categories);
break;
// Date fields
case 'DCREATED': // vCalendar property name for "CREATED"
$tag = "CREATED";
case 'DTSTAMP':
case 'COMPLETED':
case 'CREATED':
case 'LAST-MODIFIED':
$properties[$tag] = $this->_parseDateTime($value);
break;
case 'DTSTART':
case 'DTEND':
// checking for day events
if ($params['VALUE'] == 'DATE')
$check['DAY_EVENT'] = true;
case 'DUE':
case 'RECURRENCE-ID':
$properties[$tag] = $this->_parseDateTime($value);
break;
case 'RDATE':
if (array_key_exists('VALUE', $params)) {
if ($params['VALUE'] == 'PERIOD') {
$properties[$tag] = $this->_parsePeriod($value);
} else {
$properties[$tag] = $this->_parseDateTime($value);
}
} else {
$properties[$tag] = $this->_parseDateTime($value);
}
break;
case 'TRIGGER':
if (array_key_exists('VALUE', $params)) {
if ($params['VALUE'] == 'DATE-TIME') {
$properties[$tag] = $this->_parseDateTime($value);
} else {
$properties[$tag] = $this->_parseDuration($value);
}
} else {
$properties[$tag] = $this->_parseDuration($value);
}
break;
case 'EXDATE':
$properties[$tag] = array();
// comma seperated dates
$values = array();
$dates = array();
preg_match_all('/,([^,]*)/', ',' . $value, $values);
foreach ($values as $value) {
if (array_key_exists('VALUE', $params)) {
if ($params['VALUE'] == 'DATE-TIME') {
$dates[] = $this->_parseDateTime($value);
} else if ($params['VALUE'] == 'DATE') {
$dates[] = $this->_parseDate($value);
}
} else {
$dates[] = $this->_parseDateTime($value);
}
}
// some iCalendar exports (e.g. KOrganizer) use an EXDATE-entry for every
// exception, so we have to merge them
array_merge($properties[$tag], $dates);
break;
// Duration fields
case 'DURATION':
$attibutes[$tag] = $this->_parseDuration($value);
break;
// Period of time fields
case 'FREEBUSY':
$values = array();
$periods = array();
preg_match_all('/,([^,]*)/', ',' . $value, $values);
foreach ($values[1] as $value) {
$periods[] = $this->_parsePeriod($value);
}
$properties[$tag] = $periods;
break;
// UTC offset fields
case 'TZOFFSETFROM':
case 'TZOFFSETTO':
$properties[$tag] = $this->_parseUtcOffset($value);
break;
case 'PRIORITY':
$properties[$tag] = $this->_parsePriority($value);
break;
case 'CLASS':
switch (trim($value)) {
case 'PUBLIC':
$properties[$tag] = 'PUBLIC';
break;
case 'CONFIDENTIAL':
$properties[$tag] = 'CONFIDENTIAL';
break;
default:
$properties[$tag] = 'PRIVATE';
}
break;
// Integer fields
case 'PERCENT-COMPLETE':
case 'REPEAT':
case 'SEQUENCE':
$properties[$tag] = intval($value);
break;
// Geo fields
case 'GEO':
$floats = split(';', $value);
$value['latitude'] = floatval($floats[0]);
$value['longitude'] = floatval($floats[1]);
$properties[$tag] = $value;
break;
// Recursion fields
case 'EXRULE':
case 'RRULE':
$properties[$tag] = $this->_parseRecurrence($value);
break;
default:
// string fields
$properties[$tag] = trim($value);
break;
}
}
if (!$properties['RRULE']['rtype'])
$properties['RRULE'] = array('rtype' => 'SINGLE');
$properties['RRULE'] = CalendarEvent::createRepeat($properties['RRULE'], $properties['DTSTART'], $properties['DTEND']);
if (!$properties['LAST-MODIFIED'])
$properties['LAST-MODIFIED'] = $properties['CREATED'];
if (!$properties['DTSTART'] || ($properties['EXDATE'] && !$properties['RRULE'])) {
$_calendar_error->throwError(ErrorHandler::ERROR_CRITICAL, _("Die Datei ist keine gültige iCalendar-Datei!"));
$this->count = 0;
return false;
}
if (!$properties['DTEND'])
$properties['DTEND'] = $properties['DTSTART'];
// day events starts at 00:00:00 and ends at 23:59:59
if ($check['DAY_EVENT'])
$properties['DTEND']--;
// default: all imported events are set to private
if (!$properties['CLASS']
|| ($this->public_to_private && $properties['CLASS'] == 'PUBLIC')) {
$properties['CLASS'] = 'PRIVATE';
}
/*
if (isset($studip_categories[$properties['CATEGORIES']])) {
$properties['STUDIP_CATEGORY'] = $studip_categories[$properties['CATEGORIES']];
$properties['CATEGORIES'] = '';
}
*
*/
$this->components[] = $properties;
} else {
$_calendar_error->throwError(ErrorHandler::ERROR_CRITICAL, _("Die Datei ist keine gültige iCalendar-Datei!"));
$this->count = 0;
return false;
}
$this->count++;
}
return true;
}
