mirror of
https://github.com/EGroupware/egroupware.git
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1575 lines
54 KiB
PHP
1575 lines
54 KiB
PHP
<?php
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/**
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* eGroupWare - iCalendar based on Horde 3
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*
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* Class representing iCalendar files.
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*
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*
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* Using the PEAR Log class (which need to be installed!)
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage horde
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* @author Mike Cochrane <mike@graftonhall.co.nz>
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* @author Joerg Lehrke <jlehrke@noc.de>
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* @copyright (c) The Horde Project (http://www.horde.org/)
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* @version $Id$
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*/
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/**
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* Class representing iCalendar files.
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*/
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class Horde_iCalendar {
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/**
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* The parent (containing) iCalendar object.
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*
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* @var Horde_iCalendar
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*/
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var $_container = false;
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/**
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* The name/value pairs of attributes for this object (UID,
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* DTSTART, etc.). Which are present depends on the object and on
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* what kind of component it is.
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*
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* @var array
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*/
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var $_attributes = array();
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/**
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* Any children (contained) iCalendar components of this object.
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*
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* @var array
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*/
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var $_components = array();
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/**
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* According to RFC 2425, we should always use CRLF-terminated lines.
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*
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* @var string
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*/
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var $_newline = "\r\n";
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/**
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* iCalendar format version (different behavior for 1.0 and 2.0
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* especially with recurring events).
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*
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* @var string
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*/
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var $_version;
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function Horde_iCalendar($version = '2.0')
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{
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$this->_version = $version;
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$this->setAttribute('VERSION', $version);
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}
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/**
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* Return a reference to a new component.
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*
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* @param string $type The type of component to return
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* @param Horde_iCalendar $container A container that this component
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* will be associated with.
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*
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* @return object Reference to a Horde_iCalendar_* object as specified.
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*
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* @static
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*/
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function &newComponent($type, &$container)
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{
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$type = String::lower($type);
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$class = 'Horde_iCalendar_' . $type;
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if (!class_exists($class)) {
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include 'Horde/iCalendar/' . $type . '.php';
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}
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if (class_exists($class)) {
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$component = new $class();
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if ($container !== false) {
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$component->_container = &$container;
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// Use version of container, not default set by component
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// constructor.
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$component->_version = $container->_version;
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}
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} else {
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// Should return an dummy x-unknown type class here.
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$component = false;
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}
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return $component;
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}
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/**
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* Sets the value of an attribute.
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*
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* @param string $name The name of the attribute.
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* @param string $value The value of the attribute.
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* @param array $params Array containing any addition parameters for
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* this attribute.
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* @param boolean $append True to append the attribute, False to replace
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* the first matching attribute found.
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* @param array $values Array representation of $value. For
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* comma/semicolon seperated lists of values. If
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* not set use $value as single array element.
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*/
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function setAttribute($name, $value, $params = array(), $append = true,
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$values = false)
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{
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// Make sure we update the internal format version if
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// setAttribute('VERSION', ...) is called.
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if ($name == 'VERSION') {
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$this->_version = $value;
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if ($this->_container !== false) {
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$this->_container->_version = $value;
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}
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}
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if (!$values) {
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$values = array($value);
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}
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$found = false;
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if (!$append) {
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foreach (array_keys($this->_attributes) as $key) {
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if ($this->_attributes[$key]['name'] == String::upper($name)) {
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$this->_attributes[$key]['params'] = $params;
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$this->_attributes[$key]['value'] = $value;
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$this->_attributes[$key]['values'] = $values;
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$found = true;
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break;
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}
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}
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}
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if ($append || !$found) {
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$this->_attributes[] = array(
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'name' => String::upper($name),
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'params' => $params,
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'value' => $value,
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'values' => $values
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);
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}
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}
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/**
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* Sets parameter(s) for an (already existing) attribute. The
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* parameter set is merged into the existing set.
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*
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* @param string $name The name of the attribute.
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* @param array $params Array containing any additional parameters for
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* this attribute.
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* @return boolean True on success, false if no attribute $name exists.
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*/
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function setParameter($name, $params = array())
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{
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$keys = array_keys($this->_attributes);
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foreach ($keys as $key) {
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if ($this->_attributes[$key]['name'] == $name) {
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$this->_attributes[$key]['params'] =
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array_merge($this->_attributes[$key]['params'], $params);
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return true;
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}
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}
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return false;
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}
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/**
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* Get the value of an attribute.
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*
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* @param string $name The name of the attribute.
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* @param boolean $params Return the parameters for this attribute instead
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* of its value.
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*
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* @return mixed (object) PEAR_Error if the attribute does not exist.
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* (string) The value of the attribute.
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* (array) The parameters for the attribute or
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* multiple values for an attribute.
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*/
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function getAttribute($name, $params = false)
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{
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$result = array();
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foreach ($this->_attributes as $attribute) {
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if ($attribute['name'] == $name) {
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if ($params) {
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$result[] = $attribute['params'];
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} else {
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$result[] = $attribute['value'];
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}
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}
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}
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if (!count($result)) {
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require_once 'PEAR.php';
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return PEAR::raiseError('Attribute "' . $name . '" Not Found');
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} if (count($result) == 1 && !$params) {
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return $result[0];
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} else {
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return $result;
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}
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}
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/**
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* Gets the values of an attribute as an array. Multiple values
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* are possible due to:
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*
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* a) multiplce occurences of 'name'
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* b) (unsecapd) comma seperated lists.
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*
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* So for a vcard like "KEY:a,b\nKEY:c" getAttributesValues('KEY')
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* will return array('a', 'b', 'c').
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*
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* @param string $name The name of the attribute.
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* @return mixed (object) PEAR_Error if the attribute does not exist.
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* (array) Multiple values for an attribute.
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*/
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function getAttributeValues($name)
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{
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$result = array();
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foreach ($this->_attributes as $attribute) {
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if ($attribute['name'] == $name) {
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$result = array_merge($attribute['values'], $result);
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}
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}
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if (!count($result)) {
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return PEAR::raiseError('Attribute "' . $name . '" Not Found');
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}
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return $result;
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}
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/**
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* Returns the value of an attribute, or a specified default value
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* if the attribute does not exist.
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*
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* @param string $name The name of the attribute.
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* @param mixed $default What to return if the attribute specified by
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* $name does not exist.
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*
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* @return mixed (string) The value of $name.
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* (mixed) $default if $name does not exist.
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*/
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function getAttributeDefault($name, $default = '')
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{
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$value = $this->getAttribute($name);
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return is_a($value, 'PEAR_Error') ? $default : $value;
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}
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/**
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* Remove all occurences of an attribute.
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*
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* @param string $name The name of the attribute.
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*/
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function removeAttribute($name)
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{
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$keys = array_keys($this->_attributes);
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foreach ($keys as $key) {
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if ($this->_attributes[$key]['name'] == $name) {
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unset($this->_attributes[$key]);
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}
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}
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}
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/**
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* Get attributes for all tags or for a given tag.
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*
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* @param string $tag Return attributes for this tag, or all attributes if
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* not given.
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*
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* @return array An array containing all the attributes and their types.
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*/
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function getAllAttributes($tag = false)
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{
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if ($tag === false) {
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return $this->_attributes;
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}
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$result = array();
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foreach ($this->_attributes as $attribute) {
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if ($attribute['name'] == $tag) {
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$result[] = $attribute;
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}
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}
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return $result;
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}
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/**
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* Add a vCalendar component (eg vEvent, vTimezone, etc.).
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*
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* @param Horde_iCalendar $component Component (subclass) to add.
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*/
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function addComponent($component)
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{
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if (is_a($component, 'Horde_iCalendar')) {
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$component->_container = &$this;
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$this->_components[] = &$component;
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}
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}
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/**
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* Retrieve all the components.
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*
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* @return array Array of Horde_iCalendar objects.
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*/
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function getComponents()
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{
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return $this->_components;
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}
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function getType()
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{
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return 'vcalendar';
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}
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/**
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* Return the classes (entry types) we have.
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*
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* @return array Hash with class names Horde_iCalendar_xxx as keys
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* and number of components of this class as value.
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*/
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function getComponentClasses()
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{
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$r = array();
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foreach ($this->_components as $c) {
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$cn = strtolower(get_class($c));
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if (empty($r[$cn])) {
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$r[$cn] = 1;
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} else {
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$r[$cn]++;
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}
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}
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return $r;
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}
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/**
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* Number of components in this container.
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*
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* @return integer Number of components in this container.
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*/
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function getComponentCount()
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{
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return count($this->_components);
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}
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/**
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* Retrieve a specific component.
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*
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* @param integer $idx The index of the object to retrieve.
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*
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* @return mixed (boolean) False if the index does not exist.
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* (Horde_iCalendar_*) The requested component.
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*/
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function getComponent($idx)
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{
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if (isset($this->_components[$idx])) {
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return $this->_components[$idx];
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} else {
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return false;
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}
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}
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/**
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* Locates the first child component of the specified class, and returns a
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* reference to it.
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*
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* @param string $type The type of component to find.
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*
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* @return boolean|Horde_iCalendar_* False if no subcomponent of the
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* specified class exists or a reference
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* to the requested component.
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*/
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function &findComponent($childclass)
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{
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$childclass = 'Horde_iCalendar_' . String::lower($childclass);
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$keys = array_keys($this->_components);
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foreach ($keys as $key) {
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if (is_a($this->_components[$key], $childclass)) {
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return $this->_components[$key];
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}
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}
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$component = false;
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return $component;
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}
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/**
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* Locates the first matching child component of the specified class, and
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* returns a reference to it.
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*
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* @param string $childclass The type of component to find.
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* @param string $attribute This attribute must be set in the component
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* for it to match.
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* @param string $value Optional value that $attribute must match.
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*
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* @return boolean|Horde_iCalendar_* False if no matching subcomponent of
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* the specified class exists, or a
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* reference to the requested component.
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*/
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function &findComponentByAttribute($childclass, $attribute, $value = null)
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{
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$childclass = 'Horde_iCalendar_' . String::lower($childclass);
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$keys = array_keys($this->_components);
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foreach ($keys as $key) {
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if (is_a($this->_components[$key], $childclass)) {
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$attr = $this->_components[$key]->getAttribute($attribute);
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if (is_a($attr, 'PEAR_Error')) {
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continue;
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}
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if ($value !== null && $value != $attr) {
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continue;
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}
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return $this->_components[$key];
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}
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}
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$component = false;
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return $component;
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}
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/**
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* Clears the iCalendar object (resets the components and attributes
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* arrays).
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*/
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function clear()
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{
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$this->_components = array();
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$this->_attributes = array();
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}
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/**
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* Checks if entry is vcalendar 1.0, vcard 2.1 or vnote 1.1.
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*
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* These 'old' formats are defined by www.imc.org. The 'new' (non-old)
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* formats icalendar 2.0 and vcard 3.0 are defined in rfc2426 and rfc2445
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* respectively.
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*
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* @since Horde 3.1.2
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*/
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function isOldFormat()
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{
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$retval = true;
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switch ($this->getType()) {
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case 'vcard':
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$retval = ($this->_version < 3);
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break;
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case 'vNote':
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$retval = ($this->_version < 2);
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break;
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default:
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$retval = ($this->_version < 2);
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break;
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}
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return $retval;
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}
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/**
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* Export as vCalendar format.
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*/
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function exportvCalendar()
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{
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// Default values.
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$requiredAttributes['PRODID'] = '-//The Horde Project//Horde_iCalendar Library' . (defined('HORDE_VERSION') ? ', Horde ' . constant('HORDE_VERSION') : '') . '//EN';
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$requiredAttributes['METHOD'] = 'PUBLISH';
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foreach ($requiredAttributes as $name => $default_value) {
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if (is_a($this->getattribute($name), 'PEAR_Error')) {
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$this->setAttribute($name, $default_value);
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}
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}
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return $this->_exportvData('VCALENDAR');
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}
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/**
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* Export this entry as a hash array with tag names as keys.
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*
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* @param boolean $paramsInKeys
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* If false, the operation can be quite lossy as the
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* parameters are ignored when building the array keys.
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* So if you export a vcard with
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* LABEL;TYPE=WORK:foo
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* LABEL;TYPE=HOME:bar
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* the resulting hash contains only one label field!
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* If set to true, array keys look like 'LABEL;TYPE=WORK'
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* @return array A hash array with tag names as keys.
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*/
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function toHash($paramsInKeys = false)
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{
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$hash = array();
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foreach ($this->_attributes as $a) {
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$k = $a['name'];
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if ($paramsInKeys && is_array($a['params'])) {
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foreach ($a['params'] as $p => $v) {
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$k .= ";$p=$v";
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}
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}
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$hash[$k] = $a['value'];
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}
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return $hash;
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}
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/**
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* Parses a string containing vCalendar data.
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*
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* @todo This method doesn't work well at all, if $base is VCARD.
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*
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* @param string $text The data to parse.
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* @param string $base The type of the base object.
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* @param string $charset The encoding charset for $text. Defaults to
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* utf-8 for new format, iso-8859-1 for old format.
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* @param boolean $clear If true clears the iCal object before parsing.
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*
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* @return boolean True on successful import, false otherwise.
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*/
|
|
function parsevCalendar($text, $base = 'VCALENDAR', $charset = null,
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$clear = true)
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{
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if ($clear) {
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$this->clear();
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}
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if (preg_match('/^BEGIN:' . $base . '(.*)^END:' . $base . '/ism', $text, $matches)) {
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$container = true;
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$vCal = $matches[1];
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} else {
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// Text isn't enclosed in BEGIN:VCALENDAR
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// .. END:VCALENDAR. We'll try to parse it anyway.
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$container = false;
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$vCal = $text;
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}
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if (preg_match('/^VERSION:(\d\.\d)\s*$/ism', $vCal, $matches)) {
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// define the version asap
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#Horde::logMessage("iCalendar VERSION:" . $matches[1], __FILE__, __LINE__, PEAR_LOG_DEBUG);
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$this->setAttribute('VERSION', $matches[1]);
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}
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// Preserve a trailing CR
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$vCal = trim($vCal) . "\n";
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// All subcomponents.
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$matches = null;
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if (preg_match_all('/^BEGIN:(.*)(\r\n|\r|\n)(.*)^END:\1/Uims', $vCal, $matches)) {
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// vTimezone components are processed first. They are
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// needed to process vEvents that may use a TZID.
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foreach ($matches[0] as $key => $data) {
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$type = trim($matches[1][$key]);
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if ($type != 'VTIMEZONE') {
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continue;
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}
|
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$component = &Horde_iCalendar::newComponent($type, $this);
|
|
if ($component === false) {
|
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return PEAR::raiseError("Unable to create object for type $type");
|
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}
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$component->parsevCalendar($data, $type, $charset);
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$this->addComponent($component);
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|
|
// Remove from the vCalendar data.
|
|
$vCal = str_replace($data, '', $vCal);
|
|
}
|
|
|
|
// Now process the non-vTimezone components.
|
|
foreach ($matches[0] as $key => $data) {
|
|
$type = trim($matches[1][$key]);
|
|
if ($type == 'VTIMEZONE') {
|
|
continue;
|
|
}
|
|
$component = &Horde_iCalendar::newComponent($type, $this);
|
|
if ($component === false) {
|
|
return PEAR::raiseError("Unable to create object for type $type");
|
|
}
|
|
$component->parsevCalendar($data, $type, $charset);
|
|
|
|
$this->addComponent($component);
|
|
|
|
// Remove from the vCalendar data.
|
|
$vCal = str_replace($data, '', $vCal);
|
|
}
|
|
} elseif (!$container) {
|
|
return false;
|
|
}
|
|
|
|
// Unfold "quoted printable" folded lines like:
|
|
// BODY;ENCODING=QUOTED-PRINTABLE:=
|
|
// another=20line=
|
|
// last=20line
|
|
while (preg_match_all('/^([^:]+;\s*((ENCODING=)?QUOTED-PRINTABLE|ENCODING=[Q|q])(.*=\r?\n)+(.*[^=])?\r?\n)/mU', $vCal, $matches)) {
|
|
foreach ($matches[1] as $s) {
|
|
$r = preg_replace('/=\r?\n[ \t]*/', '', $s);
|
|
$vCal = str_replace($s, $r, $vCal);
|
|
}
|
|
}
|
|
|
|
// Unfold any folded lines.
|
|
if ($this->isOldFormat()) {
|
|
$vCal = preg_replace('/[\r\n]+([ \t])/', '\1', $vCal);
|
|
} else {
|
|
$vCal = preg_replace('/[\r\n]+[ \t]/', '', $vCal);
|
|
}
|
|
|
|
$isDate = false;
|
|
|
|
// Parse the remaining attributes.
|
|
if (preg_match_all('/^((?:[^":]+|(?:"[^"]*")+)*):([^\r\n]*)\r?$/m', $vCal, $matches)) {
|
|
foreach ($matches[0] as $attribute) {
|
|
preg_match('/([^;^:]*)((;(?:[^":]+|(?:"[^"]*")+)*)?):([^\r\n]*)[\r\n]*/', $attribute, $parts);
|
|
$tag = trim(String::upper($parts[1]));
|
|
$value = $parts[4];
|
|
$params = array();
|
|
|
|
// Parse parameters.
|
|
if (!empty($parts[2])) {
|
|
preg_match_all('/;(([^;=]*)(=([^;]*))?)/', $parts[2], $param_parts);
|
|
foreach ($param_parts[2] as $key => $paramName) {
|
|
$paramName = String::upper($paramName);
|
|
$paramValue = $param_parts[4][$key];
|
|
if ($paramName == 'TYPE') {
|
|
$paramValue = preg_split('/(?<!\\\\),/', $paramValue);
|
|
if (count($paramValue) == 1) {
|
|
$paramValue = $paramValue[0];
|
|
}
|
|
}
|
|
$params[$paramName] = $paramValue;
|
|
}
|
|
}
|
|
|
|
// Charset and encoding handling.
|
|
if (isset($params['QUOTED-PRINTABLE'])) {
|
|
$params['ENCODING'] = 'QUOTED-PRINTABLE';
|
|
}
|
|
if (isset($params['BASE64'])) {
|
|
$params['ENCODING'] = 'BASE64';
|
|
}
|
|
if (isset($params['ENCODING'])) {
|
|
switch (String::upper($params['ENCODING'])) {
|
|
case 'Q':
|
|
case 'QUOTED-PRINTABLE':
|
|
$value = quoted_printable_decode($value);
|
|
if (isset($params['CHARSET'])) {
|
|
$value = $GLOBALS['egw']->translation->convert($value, $params['CHARSET']);
|
|
} else {
|
|
$value = $GLOBALS['egw']->translation->convert($value,
|
|
empty($charset) ? ($this->isOldFormat() ? 'iso-8859-1' : 'utf-8') : $charset);
|
|
}
|
|
break;
|
|
case 'B':
|
|
case 'BASE64':
|
|
$value = base64_decode($value);
|
|
break;
|
|
}
|
|
} elseif (isset($params['CHARSET'])) {
|
|
$value = $GLOBALS['egw']->translation->convert($value, $params['CHARSET']);
|
|
} else {
|
|
// As per RFC 2279, assume UTF8 if we don't have an
|
|
// explicit charset parameter.
|
|
$value = $GLOBALS['egw']->translation->convert($value,
|
|
empty($charset) ? ($this->isOldFormat() ? 'iso-8859-1' : 'utf-8') : $charset);
|
|
}
|
|
|
|
// Get timezone info for date fields from $params.
|
|
$tzid = isset($params['TZID']) ? trim($params['TZID'], '\"') : false;
|
|
|
|
switch ($tag) {
|
|
case 'VERSION': // already processed
|
|
break;
|
|
// Date fields.
|
|
case 'COMPLETED':
|
|
case 'CREATED':
|
|
case 'LAST-MODIFIED':
|
|
$this->setAttribute($tag, $this->_parseDateTime($value, $tzid), $params);
|
|
break;
|
|
|
|
case 'BDAY':
|
|
case 'X-SYNCJE-ANNIVERSARY':
|
|
$this->setAttribute($tag, $value, $params, true, $this->_parseDate($value));
|
|
break;
|
|
|
|
case 'DTEND':
|
|
case 'DTSTART':
|
|
case 'DTSTAMP':
|
|
case 'DUE':
|
|
case 'AALARM':
|
|
case 'DALARM':
|
|
case 'RECURRENCE-ID':
|
|
// types like AALARM may contain additional data after a ;
|
|
// ignore these.
|
|
$ts = explode(';', $value);
|
|
if (isset($params['VALUE']) && $params['VALUE'] == 'DATE') {
|
|
$isDate = true;
|
|
$this->setAttribute($tag, $this->_parseDateTime($ts[0], $tzid), $params, true, $this->_parseDate($ts[0]));
|
|
} else {
|
|
$this->setAttribute($tag, $this->_parseDateTime($ts[0], $tzid), $params);
|
|
}
|
|
break;
|
|
|
|
case 'TRIGGER':
|
|
if (isset($params['VALUE'])) {
|
|
if ($params['VALUE'] == 'DATE-TIME') {
|
|
$this->setAttribute($tag, $this->_parseDateTime($value, $tzid), $params);
|
|
} else {
|
|
$this->setAttribute($tag, $this->_parseDuration($value), $params);
|
|
}
|
|
} else {
|
|
$this->setAttribute($tag, $this->_parseDuration($value), $params);
|
|
}
|
|
break;
|
|
|
|
// Comma or semicolon seperated dates.
|
|
case 'EXDATE':
|
|
case 'RDATE':
|
|
$dates = array();
|
|
preg_match_all('/[;,]([^;,]*)/', ';' . $value, $values);
|
|
|
|
foreach ($values[1] as $value) {
|
|
if ((isset($params['VALUE'])
|
|
&& $params['VALUE'] == 'DATE') || (!isset($params['VALUE']) && $isDate)) {
|
|
$dates[] = $this->_parseDate($value);
|
|
} else {
|
|
$dates[] = $this->_parseDateTime($value, $tzid);
|
|
}
|
|
}
|
|
$this->setAttribute($tag, isset($dates[0]) ? $dates[0] : null, $params, true, $dates);
|
|
break;
|
|
|
|
// Duration fields.
|
|
case 'DURATION':
|
|
$this->setAttribute($tag, $this->_parseDuration($value), $params);
|
|
break;
|
|
|
|
// Period of time fields.
|
|
case 'FREEBUSY':
|
|
$periods = array();
|
|
preg_match_all('/,([^,]*)/', ',' . $value, $values);
|
|
foreach ($values[1] as $value) {
|
|
$periods[] = $this->_parsePeriod($value);
|
|
}
|
|
|
|
$this->setAttribute($tag, isset($periods[0]) ? $periods[0] : null, $params, true, $periods);
|
|
break;
|
|
|
|
// UTC offset fields.
|
|
case 'TZOFFSETFROM':
|
|
case 'TZOFFSETTO':
|
|
$this->setAttribute($tag, $this->_parseUtcOffset($value), $params);
|
|
break;
|
|
|
|
// Integer fields.
|
|
case 'PERCENT-COMPLETE':
|
|
case 'PRIORITY':
|
|
case 'REPEAT':
|
|
case 'SEQUENCE':
|
|
$this->setAttribute($tag, intval($value), $params);
|
|
break;
|
|
|
|
// Geo fields.
|
|
case 'GEO':
|
|
if ($this->isOldFormat()) {
|
|
$floats = explode(',', $value);
|
|
$value = array('latitude' => floatval($floats[1]),
|
|
'longitude' => floatval($floats[0]));
|
|
} else {
|
|
$floats = explode(';', $value);
|
|
$value = array('latitude' => floatval($floats[0]),
|
|
'longitude' => floatval($floats[1]));
|
|
}
|
|
$this->setAttribute($tag, $value, $params);
|
|
break;
|
|
|
|
// Recursion fields. # add more flexibility
|
|
#case 'EXRULE':
|
|
#case 'RRULE':
|
|
# $this->setAttribute($tag, trim($value), $params);
|
|
# break;
|
|
|
|
// Binary fields.
|
|
case 'PHOTO':
|
|
$this->setAttribute($tag, $value, $params);
|
|
break;
|
|
|
|
// ADR, ORG and N are lists seperated by unescaped semicolons
|
|
// with a specific number of slots.
|
|
case 'ADR':
|
|
case 'N':
|
|
case 'ORG':
|
|
$value = trim($value);
|
|
// As of rfc 2426 2.4.2 semicolon, comma, and colon must
|
|
// be escaped (comma is unescaped after splitting below).
|
|
$value = str_replace(array('\\n', '\\N', '\\;', '\\:'),
|
|
array("\n", "\n", ';', ':'),
|
|
$value);
|
|
|
|
// Split by unescaped semicolons:
|
|
$values = preg_split('/(?<!\\\\);/', $value);
|
|
$value = str_replace('\\;', ';', $value);
|
|
$values = str_replace('\\;', ';', $values);
|
|
$value = str_replace('\\,', ',', $value);
|
|
$values = str_replace('\\,', ',', $values);
|
|
$this->setAttribute($tag, trim($value), $params, true, $values);
|
|
break;
|
|
|
|
// CATEGORIES is a lists seperated by unescaped commas
|
|
// with a unspecific number of slots.
|
|
case 'CATEGORIES':
|
|
$value = trim($value);
|
|
// As of rfc 2426 2.4.2 semicolon, comma, and colon must
|
|
// be escaped (semicolon is unescaped after splitting below).
|
|
$value = str_replace(array('\\n', '\\N', '\\,', '\\:'),
|
|
array("\n", "\n", ',', ':'),
|
|
$value);
|
|
|
|
// Split by unescaped commas:
|
|
$values = preg_split('/(?<!\\\\),/', $value);
|
|
$value = str_replace('\\;', ';', $value);
|
|
$values = str_replace('\\;', ';', $values);
|
|
$value = str_replace('\\,', ',', $value);
|
|
$values = str_replace('\\,', ',', $values);
|
|
$this->setAttribute($tag, trim($value), $params, true, $values);
|
|
break;
|
|
|
|
// String fields.
|
|
default:
|
|
if ($this->isOldFormat()) {
|
|
// vCalendar 1.0 and vCard 2.1 only escape semicolons
|
|
// and use unescaped semicolons to create lists.
|
|
$value = trim($value);
|
|
// Split by unescaped semicolons:
|
|
$values = preg_split('/(?<!\\\\);/', $value);
|
|
$value = str_replace('\\;', ';', $value);
|
|
$values = str_replace('\\;', ';', $values);
|
|
$this->setAttribute($tag, trim($value), $params, true, $values);
|
|
} else {
|
|
$value = trim($value);
|
|
// As of rfc 2426 2.4.2 semicolon, comma, and colon
|
|
// must be escaped (comma is unescaped after splitting
|
|
// below).
|
|
$value = str_replace(array('\\n', '\\N', '\\;', '\\:', '\\\\'),
|
|
array("\n", "\n", ';', ':', '\\'),
|
|
$value);
|
|
|
|
// Split by unescaped commas.
|
|
$values = preg_split('/(?<!\\\\),/', $value);
|
|
$value = str_replace('\\,', ',', $value);
|
|
$values = str_replace('\\,', ',', $values);
|
|
|
|
$this->setAttribute($tag, trim($value), $params, true, $values);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Export this component in vCal format.
|
|
*
|
|
* @param string $base The type of the base object.
|
|
*
|
|
* @return string vCal format data.
|
|
*/
|
|
function _exportvData($base = 'VCALENDAR')
|
|
{
|
|
$result = 'BEGIN:' . String::upper($base) . $this->_newline;
|
|
|
|
// VERSION is not allowed for entries enclosed in VCALENDAR/ICALENDAR,
|
|
// as it is part of the enclosing VCALENDAR/ICALENDAR. See rfc2445
|
|
if ($base !== 'VEVENT' && $base !== 'VTODO' && $base !== 'VALARM' &&
|
|
$base !== 'VJOURNAL' && $base !== 'VFREEBUSY' &&
|
|
$base !== 'VTIMEZONE' && $base !== 'STANDARD' && $base != 'DAYLIGHT') {
|
|
// Ensure that version is the first attribute.
|
|
$result .= 'VERSION:' . $this->_version . $this->_newline;
|
|
}
|
|
foreach ($this->_attributes as $attribute) {
|
|
$name = $attribute['name'];
|
|
if ($name == 'VERSION') {
|
|
// Already done.
|
|
continue;
|
|
}
|
|
|
|
$params_str = '';
|
|
$params = $attribute['params'];
|
|
if ($params) {
|
|
foreach ($params as $param_name => $param_value) {
|
|
/* Skip CHARSET for iCalendar 2.0 data, not allowed. */
|
|
if ($param_name == 'CHARSET' && (!$this->isOldFormat() || empty($param_value))) {
|
|
continue;
|
|
}
|
|
if ($param_name == 'ENCODING' && empty($param_value)) {
|
|
continue;
|
|
}
|
|
/* Skip VALUE=DATE for vCalendar 1.0 data, not allowed. */
|
|
if ($this->isOldFormat() &&
|
|
$param_name == 'VALUE' && $param_value == 'DATE') {
|
|
continue;
|
|
}
|
|
|
|
if ($param_value === null) {
|
|
$params_str .= ";$param_name";
|
|
} else {
|
|
$params_str .= ";$param_name=$param_value";
|
|
}
|
|
}
|
|
}
|
|
|
|
$value = $attribute['value'];
|
|
|
|
switch ($name) {
|
|
// Date fields.
|
|
case 'COMPLETED':
|
|
case 'CREATED':
|
|
case 'DCREATED':
|
|
case 'LAST-MODIFIED':
|
|
$value = $this->_exportDateTime($value);
|
|
break;
|
|
|
|
case 'DTEND':
|
|
case 'DTSTART':
|
|
case 'DTSTAMP':
|
|
case 'DUE':
|
|
case 'AALARM':
|
|
case 'DALARM':
|
|
case 'RECURRENCE-ID':
|
|
if (isset($params['VALUE'])) {
|
|
if ($params['VALUE'] == 'DATE') {
|
|
// VCALENDAR 1.0 uses T000000 - T235959 for all day events:
|
|
if ($this->isOldFormat() && $name == 'DTEND') {
|
|
$d = new Horde_Date($value);
|
|
$value = new Horde_Date(array(
|
|
'year' => $d->year,
|
|
'month' => $d->month,
|
|
'mday' => $d->mday - 1));
|
|
$value->correct();
|
|
$value = $this->_exportDate($value, '235959');
|
|
} else {
|
|
$value = $this->_exportDate($value, '000000');
|
|
}
|
|
} else {
|
|
$value = $this->_exportDateTime($value);
|
|
}
|
|
} else {
|
|
$value = $this->_exportDateTime($value);
|
|
}
|
|
break;
|
|
|
|
// Comma or semicolon seperated dates.
|
|
case 'EXDATE':
|
|
case 'RDATE':
|
|
if (is_array($attribute['values'])) {
|
|
$values = $attribute['values'];
|
|
} elseif (!empty($value)) {
|
|
if ($this->isOldFormat()) {
|
|
$values = explode(';', $value);
|
|
} else {
|
|
$values = explode(',', $value);
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
$dates = array();
|
|
foreach ($values as $date) {
|
|
if (isset($params['VALUE'])) {
|
|
if ($params['VALUE'] == 'DATE') {
|
|
$dates[] = $this->_exportDate($date, '000000');
|
|
} elseif ($params['VALUE'] == 'PERIOD') {
|
|
$dates[] = $this->_exportPeriod($date);
|
|
} else {
|
|
$dates[] = $this->_exportDateTime($date);
|
|
}
|
|
} else {
|
|
$dates[] = $this->_exportDateTime($date);
|
|
}
|
|
}
|
|
if ($this->isOldFormat()) {
|
|
$value = implode(';', $dates);
|
|
} else {
|
|
$value = implode(',', $dates);
|
|
}
|
|
break;
|
|
|
|
case 'TRIGGER':
|
|
if (isset($params['VALUE'])) {
|
|
if ($params['VALUE'] == 'DATE-TIME') {
|
|
$value = $this->_exportDateTime($value);
|
|
} elseif ($params['VALUE'] == 'DURATION') {
|
|
$value = $this->_exportDuration($value);
|
|
}
|
|
} else {
|
|
$value = $this->_exportDuration($value);
|
|
}
|
|
break;
|
|
|
|
// Duration fields.
|
|
case 'DURATION':
|
|
$value = $this->_exportDuration($value);
|
|
break;
|
|
|
|
// Period of time fields.
|
|
case 'FREEBUSY':
|
|
$value_str = '';
|
|
foreach ($value as $period) {
|
|
$value_str .= empty($value_str) ? '' : ',';
|
|
$value_str .= $this->_exportPeriod($period);
|
|
}
|
|
$value = $value_str;
|
|
break;
|
|
|
|
// UTC offset fields.
|
|
case 'TZOFFSETFROM':
|
|
case 'TZOFFSETTO':
|
|
$value = $this->_exportUtcOffset($value);
|
|
break;
|
|
|
|
// Integer fields.
|
|
case 'PERCENT-COMPLETE':
|
|
case 'PRIORITY':
|
|
case 'REPEAT':
|
|
case 'SEQUENCE':
|
|
$value = "$value";
|
|
break;
|
|
|
|
// Geo fields.
|
|
case 'GEO':
|
|
if ($this->isOldFormat()) {
|
|
$value = $value['longitude'] . ',' . $value['latitude'];
|
|
} else {
|
|
$value = $value['latitude'] . ';' . $value['longitude'];
|
|
}
|
|
break;
|
|
|
|
// Recurrence fields.
|
|
case 'EXRULE':
|
|
break;
|
|
|
|
case 'RRULE':
|
|
if (!empty($params_str) && $params_str[0] == ';')
|
|
{
|
|
// The standard requires a double colon RRULE:...
|
|
$params_str[0] = ':';
|
|
}
|
|
break;
|
|
|
|
case 'PHOTO':
|
|
break;
|
|
|
|
default:
|
|
if ($this->isOldFormat()) {
|
|
if (is_array($attribute['values']) &&
|
|
count($attribute['values']) > 1) {
|
|
$values = $attribute['values'];
|
|
if ($name == 'N' || $name == 'ADR' || $name == 'ORG') {
|
|
$glue = ';';
|
|
} else {
|
|
$glue = ',';
|
|
}
|
|
$values = str_replace(';', '\\;', $values);
|
|
$value = implode($glue, $values);
|
|
} else {
|
|
/* vcard 2.1 and vcalendar 1.0 escape only
|
|
* semicolons */
|
|
$value = str_replace(';', '\\;', $value);
|
|
}
|
|
// Text containing newlines or ASCII >= 127 must be BASE64
|
|
// or QUOTED-PRINTABLE encoded. Currently we use
|
|
// QUOTED-PRINTABLE as default.
|
|
if (preg_match("/[^\x20-\x7F]/", $value) &&
|
|
!isset($params['ENCODING'])) {
|
|
$params['ENCODING'] = 'QUOTED-PRINTABLE';
|
|
$params_str .= ';ENCODING=QUOTED-PRINTABLE';
|
|
// Add CHARSET as well. At least the synthesis client
|
|
// gets confused otherwise
|
|
if (!isset($params['CHARSET'])) {
|
|
$params['CHARSET'] = NLS::getCharset();
|
|
$params_str .= ';CHARSET=' . $params['CHARSET'];
|
|
}
|
|
}
|
|
} else {
|
|
if (is_array($attribute['values']) &&
|
|
count($attribute['values'])) {
|
|
$values = $attribute['values'];
|
|
if ($name == 'N' || $name == 'ADR' || $name == 'ORG') {
|
|
$glue = ';';
|
|
} else {
|
|
$glue = ',';
|
|
}
|
|
// As of rfc 2426 2.5 semicolon and comma must be
|
|
// escaped.
|
|
$values = str_replace(array('\\', ';', ','),
|
|
array('\\\\', '\\;', '\\,'),
|
|
$values);
|
|
$value = implode($glue, $values);
|
|
} else {
|
|
// As of rfc 2426 2.5 semicolon and comma must be
|
|
// escaped.
|
|
$value = str_replace(array('\\', ';', ','),
|
|
array('\\\\', '\\;', '\\,'),
|
|
$value);
|
|
}
|
|
$value = preg_replace('/\r?\n/', "\n", $value);
|
|
}
|
|
}
|
|
|
|
if (!empty($params['ENCODING']) && strlen(trim($value))) {
|
|
switch($params['ENCODING']) {
|
|
case 'Q':
|
|
case 'QUOTED-PRINTABLE':
|
|
$value = str_replace("\r", '', $value);
|
|
$result .= $name . $params_str . ':'
|
|
. str_replace('=0A', '=0D=0A',
|
|
$this->_quotedPrintableEncode($value))
|
|
. $this->_newline;
|
|
break;
|
|
case 'B':
|
|
case 'BASE64':
|
|
$attr_string = $name . $params_str . ":" . $this->_newline . ' ' . $this->_base64Encode($value);
|
|
$attr_string = String::wordwrap($attr_string, 75, $this->_newline . ' ',
|
|
true, 'utf-8', true);
|
|
$result .= $attr_string . $this->_newline;
|
|
if ($this->isOldFormat()) {
|
|
$result .= $this->_newline; // Append an empty line
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
$value = str_replace(array("\r", "\n"), array('', '\\n'), $value);
|
|
$attr_string = $name . $params_str;
|
|
if (!empty($value)) {
|
|
$attr_string .= ':' . $value;
|
|
}
|
|
if (!$this->isOldFormat()) {
|
|
$attr_string = String::wordwrap($attr_string, 75, $this->_newline . ' ',
|
|
true, 'utf-8', true);
|
|
}
|
|
$result .= $attr_string . $this->_newline;
|
|
}
|
|
}
|
|
|
|
foreach ($this->_components as $component) {
|
|
$result .= $component->exportvCalendar();
|
|
}
|
|
|
|
return $result . 'END:' . $base . $this->_newline;
|
|
}
|
|
|
|
/**
|
|
* Parse a UTC Offset field.
|
|
*/
|
|
function _parseUtcOffset($text)
|
|
{
|
|
$offset = array();
|
|
if (preg_match('/(\+|-)([0-9]{2})([0-9]{2})([0-9]{2})?/', $text, $timeParts)) {
|
|
$offset['ahead'] = (bool)($timeParts[1] == '+');
|
|
$offset['hour'] = intval($timeParts[2]);
|
|
$offset['minute'] = intval($timeParts[3]);
|
|
if (isset($timeParts[4])) {
|
|
$offset['second'] = intval($timeParts[4]);
|
|
}
|
|
return $offset;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Export a UTC Offset field.
|
|
*/
|
|
function _exportUtcOffset($value)
|
|
{
|
|
$offset = $value['ahead'] ? '+' : '-';
|
|
$offset .= sprintf('%02d%02d',
|
|
$value['hour'], $value['minute']);
|
|
if (isset($value['second'])) {
|
|
$offset .= sprintf('%02d', $value['second']);
|
|
}
|
|
|
|
return $offset;
|
|
}
|
|
|
|
/**
|
|
* Parse a Time Period field.
|
|
*/
|
|
function _parsePeriod($text)
|
|
{
|
|
$periodParts = explode('/', $text);
|
|
|
|
$start = $this->_parseDateTime($periodParts[0]);
|
|
|
|
if ($duration = $this->_parseDuration($periodParts[1])) {
|
|
return array('start' => $start, 'duration' => $duration);
|
|
} elseif ($end = $this->_parseDateTime($periodParts[1])) {
|
|
return array('start' => $start, 'end' => $end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Export a Time Period field.
|
|
*/
|
|
function _exportPeriod($value)
|
|
{
|
|
$period = $this->_exportDateTime($value['start']);
|
|
$period .= '/';
|
|
if (isset($value['duration'])) {
|
|
$period .= $this->_exportDuration($value['duration']);
|
|
} else {
|
|
$period .= $this->_exportDateTime($value['end']);
|
|
}
|
|
return $period;
|
|
}
|
|
|
|
/**
|
|
* Grok the TZID and return an offset in seconds from UTC for this
|
|
* date and time.
|
|
*/
|
|
function _parseTZID($date, $time, $tzid)
|
|
{
|
|
$vtimezone = $this->_container->findComponentByAttribute('vtimezone', 'TZID', $tzid);
|
|
if (!$vtimezone) {
|
|
return false;
|
|
}
|
|
|
|
$change_times = array();
|
|
foreach ($vtimezone->getComponents() as $o) {
|
|
$t = $vtimezone->parseChild($o, $date['year']);
|
|
if ($t !== false) {
|
|
$change_times[] = $t;
|
|
}
|
|
}
|
|
|
|
if (!$change_times) {
|
|
return false;
|
|
}
|
|
|
|
sort($change_times);
|
|
|
|
// Time is arbitrarily based on UTC for comparison.
|
|
$t = @gmmktime($time['hour'], $time['minute'], $time['second'],
|
|
$date['month'], $date['mday'], $date['year']);
|
|
|
|
if ($t < $change_times[0]['time']) {
|
|
return $change_times[0]['from'];
|
|
}
|
|
|
|
for ($i = 0, $n = count($change_times); $i < $n - 1; $i++) {
|
|
if (($t >= $change_times[$i]['time']) &&
|
|
($t < $change_times[$i + 1]['time'])) {
|
|
return $change_times[$i]['to'];
|
|
}
|
|
}
|
|
|
|
if ($t >= $change_times[$n - 1]['time']) {
|
|
return $change_times[$n - 1]['to'];
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parses a DateTime field and returns a unix timestamp. If the
|
|
* field cannot be parsed then the original text is returned
|
|
* unmodified.
|
|
*
|
|
* @todo This function should be moved to Horde_Date and made public.
|
|
*/
|
|
function _parseDateTime($text, $tzid = false)
|
|
{
|
|
$dateParts = explode('T', $text);
|
|
if (count($dateParts) != 2 && !empty($text)) {
|
|
// Not a datetime field but may be just a date field.
|
|
if (!preg_match('/^(\d{4})-?(\d{2})-?(\d{2})$/', $text, $match)) {
|
|
// Or not
|
|
return $text;
|
|
}
|
|
$newtext = $text.'T000000';
|
|
$dateParts = explode('T', $newtext);
|
|
}
|
|
|
|
if (!$date = Horde_iCalendar::_parseDate($dateParts[0])) {
|
|
return $text;
|
|
}
|
|
if (!$time = Horde_iCalendar::_parseTime($dateParts[1])) {
|
|
return $text;
|
|
}
|
|
|
|
// Get timezone info for date fields from $tzid and container.
|
|
$tzoffset = ($time['zone'] == 'Local' && $tzid && is_a($this->_container, 'Horde_iCalendar'))
|
|
? $this->_parseTZID($date, $time, $tzid) : false;
|
|
if ($time['zone'] == 'UTC' || $tzoffset !== false) {
|
|
$result = @gmmktime($time['hour'], $time['minute'], $time['second'],
|
|
$date['month'], $date['mday'], $date['year']);
|
|
if ($tzoffset) {
|
|
$result -= $tzoffset;
|
|
}
|
|
} else {
|
|
// We don't know the timezone so assume local timezone.
|
|
// FIXME: shouldn't this be based on the user's timezone
|
|
// preference rather than the server's timezone?
|
|
$result = @mktime($time['hour'], $time['minute'], $time['second'],
|
|
$date['month'], $date['mday'], $date['year']);
|
|
}
|
|
|
|
return ($result !== false) ? $result : $text;
|
|
}
|
|
|
|
/**
|
|
* Export a DateTime field.
|
|
*/
|
|
function _exportDateTime($value)
|
|
{
|
|
if (is_numeric($value)) {
|
|
$temp = array();
|
|
$tz = date('O', $value);
|
|
$TZOffset = (3600 * substr($tz, 0, 3)) + (60 * substr(date('O', $value), 3, 2));
|
|
$value -= $TZOffset;
|
|
|
|
$temp['zone'] = 'UTC';
|
|
$temp['year'] = date('Y', $value);
|
|
$temp['month'] = date('n', $value);
|
|
$temp['mday'] = date('j', $value);
|
|
$temp['hour'] = date('G', $value);
|
|
$temp['minute'] = date('i', $value);
|
|
$temp['second'] = date('s', $value);
|
|
return Horde_iCalendar::_exportDate($temp) . 'T' . Horde_iCalendar::_exportTime($temp);
|
|
} else if (is_object($value) || is_array($value)) {
|
|
$dateOb = new Horde_Date($value);
|
|
return Horde_iCalendar::_exportDateTime($dateOb->timestamp());
|
|
}
|
|
return $value; // nothing to do with us, let's not touch it
|
|
}
|
|
|
|
/**
|
|
* Parses a Time field.
|
|
*
|
|
* @static
|
|
*/
|
|
function _parseTime($text)
|
|
{
|
|
if (preg_match('/([0-9]{2})([0-9]{2})([0-9]{2})(Z)?/', $text, $timeParts)) {
|
|
$time['hour'] = intval($timeParts[1]);
|
|
$time['minute'] = intval($timeParts[2]);
|
|
$time['second'] = intval($timeParts[3]);
|
|
if (isset($timeParts[4])) {
|
|
$time['zone'] = 'UTC';
|
|
} else {
|
|
$time['zone'] = 'Local';
|
|
}
|
|
return $time;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Exports a Time field.
|
|
*/
|
|
function _exportTime($value)
|
|
{
|
|
$time = sprintf('%02d%02d%02d',
|
|
$value['hour'], $value['minute'], $value['second']);
|
|
if ($value['zone'] == 'UTC') {
|
|
$time .= 'Z';
|
|
}
|
|
return $time;
|
|
}
|
|
|
|
/**
|
|
* Parses a Date field.
|
|
*
|
|
* @static
|
|
*/
|
|
function _parseDate($text)
|
|
{
|
|
$parts = explode('T', $text);
|
|
if (count($parts) == 2) {
|
|
$text = $parts[0];
|
|
}
|
|
|
|
if (!preg_match('/^(\d{4})-?(\d{2})-?(\d{2})$/', $text, $match)) {
|
|
return false;
|
|
}
|
|
|
|
return array('year' => $match[1],
|
|
'month' => $match[2],
|
|
'mday' => $match[3]);
|
|
}
|
|
|
|
/**
|
|
* Exports a date field.
|
|
*
|
|
* @param object|array $value Date object or hash.
|
|
* @param string $autoconvert If set, use this as time part to export the
|
|
* date as datetime when exporting to Vcalendar
|
|
* 1.0. Examples: '000000' or '235959'
|
|
*/
|
|
function _exportDate($value, $autoconvert = false)
|
|
{
|
|
if (is_object($value)) {
|
|
$value = array('year' => $value->year, 'month' => $value->month, 'mday' => $value->mday);
|
|
}
|
|
if ($autoconvert !== false && $this->isOldFormat()) {
|
|
return sprintf('%04d%02d%02dT%s', $value['year'], $value['month'], $value['mday'], $autoconvert);
|
|
} else {
|
|
return sprintf('%04d%02d%02d', $value['year'], $value['month'], $value['mday']);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse a Duration Value field.
|
|
*/
|
|
function _parseDuration($text)
|
|
{
|
|
if (preg_match('/([+]?|[-])P(([0-9]+W)|([0-9]+D)|)(T(([0-9]+H)|([0-9]+M)|([0-9]+S))+)?/', trim($text), $durvalue)) {
|
|
// Weeks.
|
|
$duration = 7 * 86400 * intval($durvalue[3]);
|
|
|
|
if (count($durvalue) > 4) {
|
|
// Days.
|
|
$duration += 86400 * intval($durvalue[4]);
|
|
}
|
|
if (count($durvalue) > 5) {
|
|
// Hours.
|
|
$duration += 3600 * intval($durvalue[7]);
|
|
|
|
// Mins.
|
|
if (isset($durvalue[8])) {
|
|
$duration += 60 * intval($durvalue[8]);
|
|
}
|
|
|
|
// Secs.
|
|
if (isset($durvalue[9])) {
|
|
$duration += intval($durvalue[9]);
|
|
}
|
|
}
|
|
|
|
// Sign.
|
|
if ($durvalue[1] == "-") {
|
|
$duration *= -1;
|
|
}
|
|
|
|
return $duration;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Export a duration value.
|
|
*/
|
|
function _exportDuration($value)
|
|
{
|
|
$duration = '';
|
|
if ($value < 0) {
|
|
$value *= -1;
|
|
$duration .= '-';
|
|
}
|
|
$duration .= 'P';
|
|
|
|
$weeks = floor($value / (7 * 86400));
|
|
$value = $value % (7 * 86400);
|
|
if ($weeks) {
|
|
$duration .= $weeks . 'W';
|
|
}
|
|
|
|
$days = floor($value / (86400));
|
|
$value = $value % (86400);
|
|
if ($days) {
|
|
$duration .= $days . 'D';
|
|
}
|
|
|
|
if ($value) {
|
|
$duration .= 'T';
|
|
|
|
$hours = floor($value / 3600);
|
|
$value = $value % 3600;
|
|
if ($hours) {
|
|
$duration .= $hours . 'H';
|
|
}
|
|
|
|
$mins = floor($value / 60);
|
|
$value = $value % 60;
|
|
if ($mins) {
|
|
$duration .= $mins . 'M';
|
|
}
|
|
|
|
if ($value) {
|
|
$duration .= $value . 'S';
|
|
}
|
|
}
|
|
|
|
return $duration;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert an 8bit string to a base64 string
|
|
* to RFC2045, section 6.7.
|
|
*
|
|
* @param string $input The string to be encoded.
|
|
*
|
|
* @return string The base64 encoded string.
|
|
*/
|
|
function _base64Encode($input = '')
|
|
{
|
|
return base64_encode($input);
|
|
}
|
|
|
|
|
|
/**
|
|
* Converts an 8bit string to a quoted-printable string according to RFC
|
|
* 2045, section 6.7.
|
|
*
|
|
* imap_8bit() does not apply all necessary rules.
|
|
*
|
|
* @param string $input The string to be encoded.
|
|
*
|
|
* @return string The quoted-printable encoded string.
|
|
*/
|
|
function _quotedPrintableEncode($input = '')
|
|
{
|
|
$output = $line = '';
|
|
$len = strlen($input);
|
|
|
|
for ($i = 0; $i < $len; ++$i) {
|
|
$ord = ord($input[$i]);
|
|
// Encode non-printable characters (rule 2).
|
|
if ($ord == 9 ||
|
|
($ord >= 32 && $ord <= 60) ||
|
|
($ord >= 62 && $ord <= 126)) {
|
|
$chunk = $input[$i];
|
|
} else {
|
|
// Quoted printable encoding (rule 1).
|
|
$chunk = '=' . String::upper(sprintf('%02X', $ord));
|
|
}
|
|
$line .= $chunk;
|
|
// Wrap long lines (rule 5)
|
|
if (strlen($line) + 1 > 76) {
|
|
$line = String::wordwrap($line, 75, "=\r\n", true, 'us-ascii', true);
|
|
$newline = strrchr($line, "\r\n");
|
|
if ($newline !== false) {
|
|
$output .= substr($line, 0, -strlen($newline) + 2);
|
|
$line = substr($newline, 2);
|
|
} else {
|
|
$output .= $line;
|
|
}
|
|
continue;
|
|
}
|
|
// Wrap at line breaks for better readability (rule 4).
|
|
if (substr($line, -3) == '=0A') {
|
|
$output .= $line . "=\r\n ";
|
|
$line = '';
|
|
}
|
|
}
|
|
$output .= $line;
|
|
|
|
// Trailing whitespace must be encoded (rule 3).
|
|
$lastpos = strlen($output) - 1;
|
|
if ($output[$lastpos] == chr(9) ||
|
|
$output[$lastpos] == chr(32)) {
|
|
$output[$lastpos] = '=';
|
|
$output .= String::upper(sprintf('%02X', ord($output[$lastpos])));
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
}
|