function parseVFB($lines, &$line_no)
{
for (; $line_no < sizeof($lines); $line_no++) {
$line = $lines[$line_no];
if ($i = strpos($line, ":")) {
$field = substr($line, 0, $i);
$value = substr($line, $i + 1);
switch (strtolower($field)) {
case 'begin':
$line_no++;
$vfb_loc[strtolower($value)] = parseVFB($lines, $line_no);
break;
case 'dtend':
case 'dtstart':
case 'dtstamp':
$vfb_loc[strtolower($field)] = parseVFB_date($value);
break;
case 'freebusy':
if ($i = strpos($value, "/")) {
$val['starttime'] = parseVFB_date(substr($value, 0, $i));
$val['endtime'] = parseVFB_date(substr($value, $i + 1));
}
$vfb_loc[strtolower($field)][] = $val;
break;
case 'end':
return $vfb_loc;
default:
$vfb_loc[strtolower($field)] = $value;
}
}
}
return $vfb_loc;
}
function readFBfromContact($emailaddress, $starttime, $endtime)
{
$email1address = GetPropIDFromString($this->_defaultstore, "PT_STRING8:{00062004-0000-0000-C000-000000000046}:0x8083");
$email2address = GetPropIDFromString($this->_defaultstore, "PT_STRING8:{00062004-0000-0000-C000-000000000046}:0x8093");
$email3address = GetPropIDFromString($this->_defaultstore, "PT_STRING8:{00062004-0000-0000-C000-000000000046}:0x80A3");
$internetfb = GetPropIDFromString($this->_defaultstore, "PT_STRING8:{00062004-0000-0000-C000-000000000046}:0x80D8");
$rows = $this->readResolveRecipientsfromContacts($emailaddress);
foreach ($rows as $entry) {
$res['displayname'] = w2u($entry[PR_DISPLAY_NAME]);
$res['type'] = 2;
if (isset($entry[$email1address]) && $entry[$email1address] == $emailaddress) {
$res['emailaddress'] = $entry[$email1address];
} else {
if (isset($entry[$email2address]) && $entry[$email2address] == $emailaddress) {
$res['emailaddress'] = $entry[$email2address];
} else {
if (isset($entry[$email3address]) && $entry[$email3address] == $emailaddress) {
$res['emailaddress'] = $entry[$email3address];
}
}
}
$entries = array();
if (isset($entry[$internetfb])) {
if ($fb_file = file_get_contents($entry[$internetfb])) {
$lines = preg_split('/\\n/', str_replace("\r", "", $fb_file));
$line_no = 0;
$vfb = parseVFB($lines, $line_no);
if (isset($vfb['vcalendar']['vfreebusy']['freebusy'])) {
foreach ($vfb['vcalendar']['vfreebusy']['freebusy'] as $value) {
if ($value['starttime'] > $starttime || $value['endtime'] < $endtime) {
$entries[] = array('start' => $value['starttime'] < $starttime ? $starttime : $value['starttime'], 'end' => $value['endtime'] > $endtime ? $endtime : $value['endtime'], 'status' => '2');
}
}
}
}
}
$res['entries'] = $entries;
$result[$emailaddress][] = $res;
}
return $result;
}