The Value class of a Field Type is by design very simple. It is meant to= be stateless, and as lightweight as possible. Therefore, this class must c= ontain as little logic as possible, as this is the responsibility of the Ty= pe class .
The Value will at least contain:
public properties, used to store the actual data
an implementation of the __toString() method (required =
by the Value interface we inherit from)
By default, the constructor from FieldType\Value will be =
used, and allows you to pass a hash of property/value pairs. In our example=
, we can see that we can override it as well if we want.
The Tweet Field Type is going to store three things:
The tweet=E2=80=99s URL
The tweet=E2=80=99s author URL
The body, as an HTML string
At this point, we don=E2=80=99t care where those are stored. All we care= about is what we want our Field Type to expose as an API. We end up with t= he following properties:
/** * Tweet URL on twitter.com (http://twitter.com/UserName/status/id). * @var string */ public $url; =20 /** * Author's tweet URL (http://twitter.com/UserName) * @var string */ public $authorUrl; =20 /** * The tweet's embed HTML * @var string */ public $contents;=20
The only thing left to honor the FieldType\Value interfac=
e is the __toString() method. Let=E2=80=99s say that ours wil=
l return the tweet=E2=80=99s URL:
public function __toString()
{
return $this->url;
}=20