Planet CakePHP

/**
* A very simple unassuming ICS parser.
*
* Reads a ICS file and splits the information into useable arrays.
* Does not try and interpret the specification, just provides a raw data interface.
*
* @author Aidan Lister
* @version 1.0.0
* @link http://aidanlister.com/repos/v/iCalReader.php
*/
class ICSReader
{
/**
* Element array of data source
*
* @var array
* @access private
*/
var $_source = '';

/**
* Line number to be parsed next
*
* @var int
* @access private
*/
var $_linenum = 0;

/**
* Parsed data
*
* @var array
* @access private
*/
var $_data = array();

/**
* Constructor
*
* @param string Path to file to be parsed
* @access public
*/
function iCalReader($source)
{
$source = file_get_contents($source);
$source = preg_split('#\n(?!s)#', $source);
$this->_source = array_map('trim', $source);

$this->_data['meta'] = $this->_parseMeta();
$this->_data['events'] = $this->_parseEvents();
}

/**
* Return parsed meta information
*
* @access public
* @return array Parsed meta information
*/
function getMeta()
{
return $this->_data['meta'];
}

/**
* Return parsed event information
*
* @access public
* @return array Parsed event information
*/
function getEvents()
{
return $this->_data['events'];
}

/**
* Parse meta information
*
* @access private
*/
function _parseMeta()
{
// Init
$meta = array();
$i = 0;

// Sanity check
if ($this->_source[$i] !== 'BEGIN:VCALENDAR') {
return false;
}

// Iterate source
$i++;
while (isset($this->_source[$i])) {
$line = $this->_source[$i];
list($key, $value) = explode(':', $line, 2);

// Meta information
$meta[$key] = $value;

$i++;

// Check next line for EOM
if ($this->_source[$i] === 'BEGIN:VEVENT') {
break;
}
}

$this->_linenum = $i;
return $meta;
}

/**
* Parse events information
*
* @access private
*/
function _parseEvents()
{
// Init
$events = array();
$i = $this->_linenum;
$j = 0;

// Iterate source
while (isset($this->_source[$i])) {
$line = $this->_source[$i];
list($key, $value) = explode(':', $line, 2);

// Event information
$events[$j++] = $this->_parseEvent();
$i = $this->_linenum;

// Check next line for EOC
if ($this->_source[$i] === 'END:VCALENDAR') {
break;
}
}

return $events;
}

/**
* Parse a single events information
*
* @access private
*/
function _parseEvent()
{
// Init
$event = array();
$i = $this->_linenum;

// Sanity check
if ($this->_source[$i] !== 'BEGIN:VEVENT') {
return false;
}

$i++;
while (isset($this->_source[$i])) {
$line = $this->_source[$i];
list($key, $value) = explode(':', $line, 2);

// Event information
if ($key === 'DESCRIPTION') {
$value = str_replace(
array("\r\n", '\n', ',', ';'),
array('', "\n", ',', ';'),
$value);
}
$event[$key] = $value;
$i++;

// Check next line for EOE
if ($this->_source[$i] === 'END:VEVENT') {
$this->_linenum = $i + 1;
return $event;
}
}

// Parsing error (End tag not found)
return false;
}
}