* $ical = new ical('./calendar.ics'); * $ical->parse(); * echo '

'.print_r($ical->get_all_data(), true).'

'; * * */ //namespace Helpers\Calendar; class ical { /** @var string content of file */ private $plain_content = null; /** @var array save iCalendar parse data */ private $cal = []; /** @var string Help variable save last key (multiline string) */ private $last_key = ''; /** @var array buffer */ private $buffer = []; /** @var string nesting or open tag */ private $nesting = 'VCALENDAR'; /** * Constructr iCal parser object * @param string $filename */ public function __construct($filename = null) { if (!is_null($filename)) $this->read_file($filename); } /** * Read iCal file * @param string $filename */ public function read_file($filename) { // FIXME load file content and replace wrong way formated lines $this->plain_content = preg_replace("/[\r\n]{1,} ([:;])/", "\\1", file_get_contents($filename)); // because Mozilla Calendar save values wrong, like this --> #SUMMARY // :Text of sumary // good way is, for example in SunnyBird. SunnyBird save iCal like this example --> #SUMMARY:Text of sumary } /** * Prekladac kalendare * * @param string|url $filename * @return unknown */ public function parse() { $this->plain_content = preg_split("/[\n]/", $this->plain_content); // split by lines // is this text vcalendar standart text ? on line 1 is BEGIN:VCALENDAR if (strpos($this->plain_content[0], 'BEGIN:VCALENDAR') === false) { throw new Exception('Not a VCALENDAR file'); } foreach ($this->plain_content as $text) { $text = trim($text); // trim one line if (!empty($text)) { // get Key and Value VCALENDAR:Begin --> Key = VCALENDAR, Value = begin list($key, $value) = $this->retun_key_value($text); if ($key === false) { $key = $this->last_key; // in case key is empty } // process simple dates if (($key == "DTSTAMP") || ($key == "LAST-MODIFIED") || ($key == "CREATED")) { $value = $this->ical_date_to_unix($value); } // process RRULE if ($key == "RRULE") { $value = $this->ical_rrule($value); } // // process ical date values like // // [DTSTART;VALUE=DATE] => 20121224 // [DTEND;VALUE=DATE] => 20121225 if (strpos($key, 'DTSTART') !== false || strpos($key, 'DTEND') !== false) { list($key, $value) = $this->ical_dt_date($key, $value); } switch ($text) // search special string { case "BEGIN:VCALENDAR": case "BEGIN:DAYLIGHT": case "BEGIN:VTIMEZONE": case "BEGIN:STANDARD": case "BEGIN:VTODO": case "BEGIN:VEVENT": $this->nesting = substr($text, 6); $this->buffer[$this->nesting] = []; // null buffer break; case "END:VCALENDAR": $this->cal['VCALENDAR'] = $this->buffer['VCALENDAR']; // save buffer break; case "END:DAYLIGHT": case "END:VTIMEZONE": case "END:STANDARD": case "END:VEVENT": case "END:VTODO": $this->cal[substr($text, 4)][] = $this->buffer[$this->nesting]; // save buffer break; default: // no special string $this->buffer[$this->nesting][$key] = $value; $this->last_key = $key; // save last key break; } } } return $this->cal; } /* -------------------------------------------------------------------------- * Private parser functions * -------------------------------------------------------------------------- */ /** * Parse text "XXXX:value text some with : " and return array($key = "XXXX", $value="value"); * * @param unknown_type $text * @return unknown */ private function retun_key_value($text) { preg_match("/([^:]+)[:]([\w\W]+)/", $text, $matches); if (empty($matches)) { return [false, $text]; } else { $matches = array_splice($matches, 1, 2); return $matches; } } /** * Parse RRULE return array * * @param unknown_type $value * @return unknown */ private function ical_rrule($value) { $rrule = explode(';', $value); foreach ($rrule as $line) { $rcontent = explode('=', $line); $result[$rcontent[0]] = $rcontent[1]; } return $result; } /** * Return Unix time from ical date time fomrat (YYYYMMDD[T]HHMMSS[Z] or YYYYMMDD[T]HHMMSS) * * @param unknown_type $ical_date * @return unknown */ private function ical_date_to_unix($ical_date) { $ical_date = preg_replace(['/T/', '/Z/'], '', $ical_date); // remove T and Z from strig if (preg_match('/([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{0,2})([0-9]{0,2})([0-9]{0,2})/', $ical_date, $date)) { if ($date[1] <= 1970) { $date[1] = 1971; // FIXME UNIX timestamps can't deal with pre 1970 dates } return mktime((int) $date[4], (int) $date[5], (int) $date[6], (int) $date[2], (int) $date[3], (int) $date[1]); } else { return null; } } /** * Return unix date from iCal date format * * @param string $key * @param string $value * @return array */ private function ical_dt_date($key, $value) { $value = $this->ical_date_to_unix($value); // zjisteni TZID $temp = explode(";", $key); if (empty($temp[1])) // neni TZID { // 2011-06-02 ms fix $value = str_replace('T', '', $value); return [$key, $value]; } // pridani $value a $tzid do pole $key = $temp[0]; $temp = explode("=", $temp[1]); $return_value[$temp[0]] = $temp[1]; $return_value['unixtime'] = $value; return [$key, $return_value]; } /* -------------------------------------------------------------------------- * List of public getters * -------------------------------------------------------------------------- */ /** * Return sorted eventlist as array or false if calenar is empty * * @return array|boolean */ public function get_sort_event_list() { $temp = $this->get_event_list(); if (!empty($temp)) { usort($temp, [&$this, "ical_dtstart_compare"]); return $temp; } else { return false; } } /** * Compare two unix timestamp * * @param array $a * @param array $b * @return integer */ private function ical_dtstart_compare($a, $b) { return strnatcasecmp($a['DTSTART']['unixtime'], $b['DTSTART']['unixtime']); } /** * Return eventlist array (not sort eventlist array) * * @return array */ public function get_event_list() { return $this->cal['VEVENT']; } /** * Return todo arry (not sort todo array) * * @return array */ public function get_todo_list() { if (empty($this->cal['VTODO'])) { return []; } return $this->cal['VTODO']; } /** * Return base calendar data * * @return array */ public function get_calender_data() { return $this->cal['VCALENDAR']; } /** * Return array with all data * * @return array */ public function get_all_data() { return $this->cal; } }