Sending .ics event as email attachment

I'm trying to send an .ics file as an email attachment using Laravel's MAIL class. When email is received, Gmail doesn't ask me to add event to calendar. However I can easily add the event to the calendar by uploading the received file. (Format is valid.) And there is a small calendar icon as well, yet there is no fancy formatting or any formatting at all. Here's the code I'm using:

$filename = "invite.ics";
$data[0]  = "BEGIN:VCALENDAR";
$data[1] = "PRODID:-//Google Inc//Google Calendar 70.9054//EN";
$data[2] = "VERSION:2.0";
$data[3] = "CALSCALE:GREGORIAN";
$data[4] = "METHOD:REQUEST";
$data[8] = "BEGIN:VEVENT";
$data[9] = "DTSTART:20140312T080000Z";
$data[10] = "DTEND:20140312T103000Z";
$data[11] = "DTSTAMP:20140312T072230Z";
$data[12] = "UID:[email protected]";
$data[13] = "CREATED:20140312T072126Z";
$data[14] = "DESCRIPTION:Hair cut\, 2\,5h\, 300Eur";
$data[15] = "LAST-MODIFIED:20140312T072206Z";
$data[16] = "LOCATION:";
$data[17] = "SEQUENCE:0";
$data[18] = "STATUS:CONFIRMED";
$data[19] = "SUMMARY:Matu griešana";
$data[20] = "TRANSP:OPAQUE";
$data[21] = "END:VEVENT";
$data[22] = "END:VCALENDAR";


$data = implode("\r\n", $data);
header("text/calendar");
file_put_contents($filename, "\xEF\xBB\xBF".  $data);

Mail::send('emails.temp', array(), function($message) use($filename)
{
    $message->from([email protected]', 'Jon Doe');
    $message->to([email protected]')->subject('Registration information');

    $message->attach($filename, array('mime' => "text/calendar"));
});

Do it this way, bro:

	\Mail::send('yourMail/file', $data, function($message) use($data)
	{
		$filename = "invite.ics";
		$meeting_duration = (3600 * 2); // 2 hours
		$meetingstamp = strtotime( $data['start_date'] . " UTC");
		$dtstart = gmdate('Ymd\THis\Z', $meetingstamp);
		$dtend =  gmdate('Ymd\THis\Z', $meetingstamp + $meeting_duration);
		$todaystamp = gmdate('Ymd\THis\Z');
		$uid = date('Ymd').'T'.date('His').'-'.rand().[email protected]';
		$description = strip_tags($data['texto']);
		$location = "Telefone ou vídeo conferência";
		$titulo_invite = "Your meeting title";
		$organizer = "CN=Organizer name:[email protected]";
		
		// ICS
		$mail[0]  = "BEGIN:VCALENDAR";
		$mail[1] = "PRODID:-//Google Inc//Google Calendar 70.9054//EN";
		$mail[2] = "VERSION:2.0";
		$mail[3] = "CALSCALE:GREGORIAN";
		$mail[4] = "METHOD:REQUEST";
		$mail[5] = "BEGIN:VEVENT";
		$mail[6] = "DTSTART;TZID=America/Sao_Paulo:" . $dtstart;
		$mail[7] = "DTEND;TZID=America/Sao_Paulo:" . $dtend;
		$mail[8] = "DTSTAMP;TZID=America/Sao_Paulo:" . $todaystamp;
		$mail[9] = "UID:" . $uid;
		$mail[10] = "ORGANIZER;" . $organizer;
		$mail[11] = "CREATED:" . $todaystamp;
		$mail[12] = "DESCRIPTION:" . $description;
		$mail[13] = "LAST-MODIFIED:" . $todaystamp;
		$mail[14] = "LOCATION:" . $location;
		$mail[15] = "SEQUENCE:0";
		$mail[16] = "STATUS:CONFIRMED";
		$mail[17] = "SUMMARY:" . $titulo_invite;
		$mail[18] = "TRANSP:OPAQUE";
		$mail[19] = "END:VEVENT";
		$mail[20] = "END:VCALENDAR";
		
		$mail = implode("\r\n", $mail);
		header("text/calendar");
		file_put_contents($filename, $mail);
		
		$message->subject($data['titulo']);
		$message->to($data['destinatario']);
	    $message->attach($filename, array('mime' => "text/calendar"));
	});

Regards,

David

@davidtoledo

Thank you for your snippet.

@davidtoledo

Thanks for your snippet. It's working in gmail but not working in outlook. I am getting 'The .ICS attachment can't be viewed because the format is not supported.' Please let me know where the problem is?