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====== Matrix bot task: Celtic game warning ======

I want to know if the pub is gonna be busy or if certain friends might not be available, so I need to know when Celtic games are on.

The first hit when I searched 'celtic games' was this [[https://www.skysports.com/celtic-fixtures|Sky Sports: Celtic Fixtures]] page.  Luckily they provide an iCal feed of the games.  I used the [[https://sabre.io/vobject/icalendar/|Sabre VObject PHP class]] to parse their [[webcal://www.skysports.com/calendars/football/fixtures/teams/celtic?live=false|calendar file]].

Install VObject using composer:
<code bash>
cd projectdir
composer require sabre/vobject ~4.1
</code>

<code php celtic-warning.php>
<?php
use Sabre\VObject;
include  'vendor/autoload.php';

$url = "https://www.skysports.com/calendars/football/fixtures/teams/celtic?live=false";
$vcalendar = VObject\Reader::read(fopen($url, 'r'));

$today = date("Ymd");
$str = "";

foreach($vcalendar->VEVENT as $event) {
   $date = substr($event->DTSTART,0,8);
   if($today == $date) {
      $time = substr($event->DTSTART,8,12);

      $str .= "Warning:  Celtic game today at ";
      $str .= date("g:ia", strtotime($time));
      $str .= " (";
      $str .= $event->SUMMARY;
      $str .= ")";
      $str .= "\n";
   }
}

if(!empty($str)) {

   require("matrix.class.php");
   $mat = new matrix();

   $room = "#glasgow";

   $mat->post($str, $room);

}

</code>

That runs once a day, in the morning and warns me in the main #glasgow channel.  It uses my [[Matrix PHP class]] to post.

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