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Parse Trenitalia ICS
<?php
// Based on CalFileParser (https://github.com/controlz/CalFileParser) by Michael Mottola
// Author: @LucaTNT
// My code is MIT licensed as well
// Inserisci qui dove salvare il file ICS sistemato
$saveTo = '/Users/luca/Downloads/AddToiCal.ics';
/*
* CalFileParser
*
* Parser for iCal and vCal files. Reads event information and
* outputs data into an Array or JSON
*
* @author Michael Mottola <mikemottola@gmail.com>
* @license MIT
* @version 1.0
*
*/
class CalFileParser {
private $_base_path = './';
private $_file_name = '';
private $_output = 'array';
private $DTfields = array('dtstart', 'dtend', 'dtstamp', 'created', 'last-modified');
private $timezone = null;
function __construct() {
$this->_default_output = $this->_output;
}
public function set_base_path($path) {
if (isset($path)) {
$this->_base_path = $path;
}
}
public function set_file_name($filename) {
if (!empty($filename)) {
$this->_file_name = $filename;
}
}
public function set_output($output) {
if (!empty($output)) {
$this->_output = $output;
}
}
public function get_base_path() {
return $this->_base_path;
}
public function get_file_name() {
return $this->_file_name;
}
public function get_output() {
return $this->_output;
}
/**
* Read File
*
* @param string $file
* @return string
*
* @example
* read_file('schedule.vcal')
* read_file('../2011-08/'schedule.vcal');
* read_file('http://michaelencode.com/example.vcal');
*/
public function read_file($file = '') {
if (empty($file)) {
$file = $this->_file_name;
}
// check to see if file path is a url
if (preg_match('/^(http|https):/', $file) === 1) {
return $this->read_remote_file($file);
}
//empty base path if file starts with forward-slash
if (substr($file, 0, 1) === '/') {
$this->set_base_path('');
}
if (!empty($file) && file_exists($this->_base_path . $file)) {
$file_contents = file_get_contents($this->_base_path . $file);
return $file_contents;
} else {
return false;
}
}
/**
* Read Remote File
* @param $file
* @return bool|string
*/
public function read_remote_file($file) {
if (!empty($file)) {
$data = file_get_contents($file);
if ($data !== false) {
return $data;
}
}
return false;
}
/**
* Parse
* Parses iCal or vCal file and returns data of a type that is specified
* @param string $file
* @param string $output
* @return mixed|string
*/
public function parse($file = '', $output = '') {
$file_contents = $this->read_file($file);
if ($file_contents === false) {
return 'Error: File Could not be read';
}
if (empty($output)) {
$output = $this->_output;
}
if (empty($output)) {
$output = $this->_default_output;
}
$events_arr = array();
// fetch timezone to create datetime object
if (preg_match('/X-WR-TIMEZONE:(.+)/i', $file_contents, $timezone) === 1) {
$date = DateTime::createFromFormat('e', trim($timezone[1]));
if ($date !== false) {
$this->timezone = $date->getTimezone();
}
}
//put contains between start and end of VEVENT into array called $events
preg_match_all('/(BEGIN:VEVENT.*?END:VEVENT)/si', $file_contents, $events);
if (!empty($events)) {
foreach ($events[0] as $event_str) {
//remove begin and end "tags"
$event_str = trim(str_replace(array('BEGIN:VEVENT','END:VEVENT'),'',$event_str));
//convert string of entire event into an array with elements containing string of 'key:value'
$event_key_pairs = $this->convert_event_string_to_array($event_str);
//convert array of 'key:value' strings to an array of key => values
$events_arr[] = $this->convert_key_value_strings($event_key_pairs);
}
}
$this->_output = $this->_default_output;
return $this->output($events_arr, $output);
}
/**
* Output
* outputs data in the format specified
*
* @param $events_arr
* @param string $output
* @return mixed
*/
private function output($events_arr, $output = 'array') {
switch ($output) {
case 'json' :
return json_encode($events_arr);
break;
default :
return $events_arr;
break;
}
}
/**
* Convert event string to array
* accepts a string of calendar event data and produces array of 'key:value' strings
* See convert_key_value_strings() to convert strings to
* @param string $event_str
* @return array
*/
private function convert_event_string_to_array($event_str = '') {
if (!empty($event_str)) {
//replace new lines with a custom delimiter
$event_str = preg_replace("/[\r\n]/", "%%" ,$event_str);
if (strpos(substr($event_str, 2), '%%') == '0') { //if this code is executed, then file consisted of one line causing previous tactic to fail
$tmp_piece = explode(':',$event_str);
$num_pieces = count($tmp_piece);
$event_str = '';
foreach ($tmp_piece as $key => $item_str) {
if ($key != ($num_pieces -1) ) {
//split at spaces
$tmp_pieces = preg_split('/\s/',$item_str);
//get the last whole word in the string [item]
$last_word = end($tmp_pieces);
//adds delimiter to front and back of item string, and also between each new key
$item_str = trim(str_replace(array($last_word,' %%' . $last_word),array('%%' . $last_word . ':', '%%' . $last_word), $item_str));
}
//build the event string back together, piece by piece
$event_str .= trim($item_str);
}
}
//perform some house cleaning just in case
$event_str = str_replace('%%%%','%%', $event_str);
if (substr($event_str, 0, 2) == '%%') {
$event_str = substr($event_str, 2);
}
//break string into array elements at custom delimiter
$return = explode('%%',$event_str);
} else {
$return = array();
}
return $return;
}
/**
* Parse Key Value String
* accepts an array of strings in the format of 'key:value' and returns an array of keys and values
* @param array $event_key_pairs
* @return array
*/
private function convert_key_value_strings($event_key_pairs = array()) {
$event = array();
if (!empty($event_key_pairs)) {
foreach ($event_key_pairs as $line) {
if (empty($line)) {
continue;
}
if ($line[0] == ' ') {
$event[$key] .= substr($line, 1);
} else {
list($key, $value) = explode(':', $line, 2);
$key = strtolower(trim($key));
// autoconvert datetime fields to DateTime object
if (in_array($key, $this->DTfields)) {
$dt_str = str_replace(array('T', 'Z'), array('-', ''), $value);
$date = @DateTime::createFromFormat('Ymd-His', $dt_str, $this->timezone);
if ($date !== false) {
$value = $date;
}
}
$event[$key] = $value;
}
}
}
// unescape every element if string.
return array_map(function($value) {
return (is_string($value) ? stripcslashes($value) : $value);
}, $event);
}
}
if (!is_file($argv[1]))
{
die('File does not exist');
}
$cal = new CalFileParser();
$event = $cal->parse($file = $argv[1], $output = 'array');
$dtstamp = $event[0]['dtstamp'];
$start = $event[0]['dtstart'];
$end = $event[0]['dtend'];
$location = $event[0]['location'];
$description = str_replace("\n", '', trim($event[0]['description']));
$summary = 'Treno - ';
preg_match('/Carr ([0-9]+)/', $event[0]['summary'], $carrozza);
$summary .= $carrozza[1].'.';
preg_match('/Posti ([0-9]+)([A-Z]+)/', $event[0]['summary'], $posto);
$summary .= $posto[1].$posto[2].' - ';
preg_match('/PNR ([0-9A-Z]+)/', $event[0]['summary'], $PNR);
$summary .= substr($PNR[1], -2, 1); // Penultima PNR
$output = "BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:$dtstamp
DTSTART:$start
DTEND:$end
SUMMARY:$summary
LOCATION:$location
DESCRIPTION:$description
END:VEVENT
END:VCALENDAR";
file_put_contents($saveTo, $output);
?>
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