Implementing the Tweet\Value class

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 clas= s must contain as little logic as possible, as this is the responsibility o= f the Type 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:

eZ/FieldType/Tweet/Value.php

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/**
* Tweet URL on twitter.com (http://twitter.com/UserName/status/id).
* @var string
*/
public $url;

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/**
* Author's tweet URL (http://twitter.com/UserName)
* @var string
*/
public $authorUrl;

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/**
* The tweet's embed HTML
* @var string
*/
public $contents;

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The only thing left to honor the FieldType\Value interfac= e is the __toString() method. Let=E2=80=99s say that ours wi= ll return the tweet=E2=80=99s URL:

eZ/FieldType/Tweet/Value.php

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public function __toString()
{
   return $this->url;
}

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