An extendable, auto mapping, PSR-7 compliant feed generator

Requirements

• PHP 5.6+
• benkle/feed-interfaces 1.1+
• symfony/http-foundation 3.3+
• psr/http-message 1.0+

Installation

FeedResponse can be included in the usual way with composer:

    composer require benkle/feed-response

Usage

Feed responses are built using a factory, which requires a bit of a setup:

use \Benkle\FeedInterfaces as FeedInterfaces;
use \Benkle\FeedResponse\XmlMappers\Atom as Atom;
use \Benkle\FeedResponse\XmlMappers\RSS20 as RSS20;
use \Benkle\FeedResponse\Collections as Collections;
use \Benkle\FeedResponse\FeedResponseFactory;

// You need two feed mappers, each with a collection of mappers
// for specific parts of the feed.

$atomMappers = new Collections\FeedItemMapperCollection();
$atomMappers
    ->add(ItemInterface::class, new Atom\FeedItemMapper())
    ->add(EnclosureInterface::class, new Atom\EnclosureMapper())
    ->add(RelationLinkInterface::class, new Atom\RelationLinkMapper());
$atomMapper = new Atom\FeedMapper();
$atomMapper->setMapperCollection($atomMappers);

$rssMappers = new Collections\FeedItemMapperCollection();
$rssMappers
    ->add(ItemInterface::class, new RSS20\FeedItemMapper())
    ->add(EnclosureInterface::class, new RSS20\EnclosureMapper())
    ->add(RelationLinkInterface::class, new Atom\RelationLinkMapper(true));
$rssMapper = new RSS20\FeedMapper();
$rssMapper->setMapperCollection($rssMappers);

$feedResponseFactory = new FeedResponseFactory();
$feedResponseFactory
    ->setAtomMapper($atomMapper)
    ->setObjectMappers($objectMappers)
    ->setRssMapper($rssMapper)
    ->setFeedPrototype(/* Insert an instance of \Benkle\FeedInterfaces\FeedInterface here */)
    ->setRelationLinkPrototype(/* Insert an instance of \Benkle\FeedInterfaces\RelationLinkInterface here */);

Afterwards you can simply create a response object with the apropriate methods:

$atomFeed = $feedResponseFactory->atom($head, $items, $relations); // For an Atom feed
$rssFeed = $feedResponseFactory->rss($head, $items, $relations); // For an RSS 2.0 feed

These methods allow for some variation on it's three parameters:

• $head can be...
  • an associative array with the following keys:

    key	RSS tag	Atom tag
    title	title	title
    description	description	subtitle
    modified	lastBuildDate	updated
    link	link	link[rel=self]
    id	guid	id

  • an instance of \Benkle\FeedInterfaces\FeedInterface
• $items is an array of any type of object. Instances of \Benkle\FeedInterfaces\FeedItemInterface will be handled directly, for any other type of object you'll also need a matching object mapper.
• $relations is an array where elements can be any of these:
  • An instance of \Benkle\FeedInterfaces\RelationLinkInterface
  • A key-value pair that maps to this tag: <link rel="key" href="value"/>
  • an associative array with the following keys:

    key	tag attribute
    url, href	href
    relationType, rel	rel
    mimeType, mime, type	type
    title	title

TODO

• Moved included collection classes to a utility package (combine with PriorityList from benkle/feed-parser)