Working with Events

Overview display all the events of the year by month

<?php
$year = $factory->getYear(2012);
$eventCollection = $factory->getEvents($year);
?>
<h1>Events in <?= $year ?></h1>
<?php foreach ($year as $month): ?>
<h2><?= $month ?></h2>
<ul>
    <?php foreach ($eventCollection->find($month) as $event): ?>
        <li><?= $event ?></li>
    <?php endforeach ?>
</ul>
<?php endforeach ?>

Create your event class

The events returned by CalendR when you call $factory->getEvents() are you own Plain PHP Objects. So you need to define them to use the event system.

Note : CalendR provides a base event class, CalendR\Event\Event, but in most (all) cases, you'd better to implement your own.

Creating your event class is pretty simple. Just define a class that implements the EventInterface interface, or extends the abstract AbstractEvent class that implements most of the interface methods

<?php
use CalendR\Event\AbstractEvent;

class Event extends AbstractEvent
{
    protected $begin;
    protected $end;
    protected $uid;

    // And all your fields

    public function __construct($uid, \DateTime $start, \DateTime $end)
    {
        $this->uid = $uid;
        $this->begin = clone $start;
        $this->end = clone $end;
    }

    public function getUid()
    {
        return $this->uid;
    }

    public function getBegin()
    {
        return $this->begin;
    }

    public function getEnd()
    {
        return $this->end;
    }
}

In this case, we extends the AbstractEvent, wich is the better choice when you can (sorry Propel users, for you, it seems that implementing all the EventInterface methods is the only choice).

Create your event provider

Now that you have your event class defined, you need to provide them to CalendR via an event provider. An event provider is basically an object that implements CalendR\Event\Provider\ProviderInterface interface.

Note : CalendR provides a basic Provider, CalendR\Event\Provider\Basic, that can be suffisant in case of very simple needs.

A provider can be any type of object, for exemple, if will often be a Doctrine2 Repository, a Propel ActiveQuery, a Doctrine1 table, or, why not, a class that fetch events from an iCalendar Server.

<?php

use CalendR\Event\Provider\ProviderInterface;

class MyAwesomeProvider implements ProviderInterface
{
    public function getEvents(\DateTime $begin, \DateTime $end, array $options = array())
    {
        /*
         Returns an array of events here. $options is the second argument of
         $factory->getEvents(), so you can filter your event on anything (Calendar id/slug ?)
        */
    }
}

Note : CalendR provides lot extensions / tools to ease the creation of your provider, see if there is one for you in the extension part of the doc. For exemple, for Doctrine2 users, we've done the job for you.

Note : If your event source is small and performant, just returns ALL your events in the provider. The CalendR EventManager will filter the events when needed.

Add your provider to Calendar

Ok, the last thing, you have to add your provider to the CalendR EventManager :

<?php

$factory = new CalendR\Calendar;
$factory->getEventManager()->addProvider('myawesomeprovider', new MyAwesomeProvider);

That’s all.

Note : If you use a framework supported by CalendR (symfony, Symfony2, Silex ATM), don't use this syntax, there is a simple way ! Check the Plugin / Bundle / ServiceProvider documentation.